A large long cylindrical multi-station horizontal extrusion hydraulic press

Abstract

The present invention belongs to the technical field of extrusion hydraulic presses, and specifically discloses a large-scale long-cylinder multi-station horizontal extrusion hydraulic press, comprising a base, a column, a front beam, a rear beam, a slider, a return cylinder, a main cylinder, a punch assembly, and a die assembly; the column is fixed between the front beam and the rear beam; the main cylinder and the return cylinder are used to drive the slider to reciprocate; the punch assembly comprises a punch structure, a slide, a slide, and a punch switching cylinder, the slide is fixed on the slider, and the punch switching cylinder is fixed on the slide; the punch structure is arranged on the slide; the slide is vertically slidably connected to the slide; the punch structure comprises a roughing punch and a stretching punch; the punch switching cylinder is used to drive the slide to move vertically; the die assembly comprises a stretching die and a clamping die structure, and the clamping die structure is used to install the stretching die. By providing a roughing punch and a stretching punch, and using a punch switching cylinder to drive the roughing punch and the stretching punch to move vertically, the corresponding punches are moved to the working position, thereby realizing a rapid conversion of the roughing or extrusion process.

Description

Technical Field

[0001] The invention belongs to the technical field of extrusion hydraulic presses, and in particular relates to a large-scale long-cylinder multi-station horizontal extrusion hydraulic press. Background Art

[0002] Some large, long cylindrical extruded workpieces often cannot be completed in one step during hot extrusion processing. They need to go through processes such as roughing and extrusion. Some workpieces even require multiple extrusion processes to complete. Traditional hot extrusion processing generally requires multiple hydraulic presses to complete multi-step forming processing, which leads to a temperature drop in the blank during the transfer process, increased process uncontrollability, and increased scrap. At the same time, transfers between processes require repositioning, and complex, high-load automated equipment is required, which occupies a large area and has low forming efficiency. Using traditional processes, multiple extrusion passes are performed on multiple horizontal extruders. Due to the eccentricity of the punch, the extrusion often has large wall thickness deviations, and each extrusion pass is not on the same axis. In addition, oxide scale will be produced before each extrusion forming pass, which greatly affects product quality. It is particularly difficult to produce products with equal wall thickness that meet the requirements. Summary of the Invention

[0003] The purpose of the present invention is to provide a large-scale long-cylinder multi-station horizontal extrusion hydraulic press to solve the problems in the prior art that the blank needs to be transferred, resulting in a drop in temperature of the blank during the transfer process, increased process uncontrollability, and increased scrap. In addition, the transfer between processes requires repositioning, requires the installation of complex large-load automated equipment, occupies a relatively large area, and has low forming efficiency.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a large-scale long-cylinder multi-station horizontal extrusion hydraulic press, including a base, a column, a front beam, a rear beam, a slider, a return cylinder and a main cylinder; the base is used to support the front beam and the rear beam; the column is provided with four groups, and the columns are fixed between the front beam and the rear beam; the four groups of columns form a working space; the main cylinder and the return cylinder are used to drive the slider to move back and forth; it also includes a punch assembly and a mold assembly; the punch assembly includes a punch structure, a slide, a slide and a punch switching cylinder, the slide is fixed on the slider, and the punch switching cylinder is fixed on the slide; the punch structure is provided on the slide; the slide is vertically slidably connected to the slide; the punch structure includes a roughing punch and a stretching punch; the punch switching cylinder is used to drive the slide to move vertically; the mold assembly includes a stretching die and a clamping die structure, and the clamping die structure is used to install the stretching die; the stretching punch matches the stretching die.

[0005] Furthermore, the die clamping structure includes a die clamping cylinder, a die base, a die clamping slider and a guide sleeve, the die base and the die clamping cylinder are fixed on the front beam, the die clamping cylinder is used to drive the die clamping slider to move, the die clamping slider is horizontally slidably connected to the column, and a horizontal first guide hole is provided on the die clamping slider, the stretching die includes a mold and a limit seat fixed on one side of the mold, the first guide hole is used to guide the mold, and the mold can move in the first guide hole along the length direction of the first guide hole; the two sides of the limit seat can be abutted against the die base and the die clamping slider; the guide sleeve and the limit seat are respectively located on both sides of the die clamping slider, and the mold can be abutted against the bottom of the guide sleeve; the guide sleeve is fixed on the die clamping slider; the guide sleeve is provided with a second guide hole for guiding the stretching punch; the stretching punch enters the mold after passing through the second guide hole.

[0006] Furthermore, it also includes an ejection structure; the ejection structure includes an ejection cylinder and an ejection rod, the ejection cylinder is fixed on the front beam, and the die base and the stretching die are both provided with ejection holes; the ejection cylinder is used to drive the ejection rod to move horizontally; the ejection rod can be inserted into the ejection holes on the die base and the stretching die and eject the workpiece in the stretching die.

[0007] Furthermore, the stretching die, stretching punch and guide sleeve correspond to each other one by one and are respectively provided in multiple groups; the stretching punch is detachably connected to the slide; the guide sleeve is detachably connected to the clamping slider; the structure, size and shape of the exterior of several stretching dies are the same, and the structure, size and shape of the exterior of several guide sleeves are the same.

[0008] Furthermore, it also includes a support assembly, the stretching punch is movably connected to the slide, the support assembly is installed on the column and is used to support the stretching punch; the support assembly includes a mounting seat, a support cylinder and a support seat; the mounting seat is fixed on the driving slider; the support cylinder is installed on the mounting seat; the support cylinder is used to drive the support seat to move vertically.

[0009] Furthermore, the stretching punch and the slide are movably connected via a movable joint; the movable joint includes a mounting head, a floating head and a clamping structure, one side of the floating head is set to be arc-shaped, a connecting hole is provided on the slide, the floating head has freedom of movement in the connecting hole, and the other side of the floating head is fixed to the mounting head; a mounting cavity is provided in the floating head; the clamping structure is used to press the stretching die into the mounting cavity.

[0010] Furthermore, the clamping structure includes a first clamping block, a second clamping block and a clamping screw; a first stepped hole is provided at the center of the first clamping block, and a mounting protrusion is provided on the stretching punch; the diameter of the mounting protrusion is larger than the diameter of the small diameter hole of the first stepped hole and smaller than the diameter of the large diameter hole of the first stepped hole, and the stretching punch can be inserted into the small diameter hole of the first stepped hole; the outer periphery of the first clamping block is set as a frustum structure, and the small diameter end of the frustum structure is away from the bottom of the mounting cavity; a tapered hole that can match the frustum structure is provided in the second clamping block; a first channel that can pass through the stretching die is provided on the second clamping block, and a second channel that can pass through the stretching die is provided on the mounting head, and the opening area of ​​the second channel is smaller than the opening area of ​​the first channel; a threaded hole is provided on the mounting head, and the clamping screw is threadedly connected to the threaded hole and can clamp the second clamping block in the mounting cavity.

[0011] Furthermore, the mounting head and the floating head are connected by a connecting block; a second stepped hole is provided at the center of the connecting block; an internal thread is provided in the large diameter hole of the second stepped hole, and an external thread is provided on the outside of the floating head, and the connecting block and the floating head can be threadedly connected by the external and internal threads; a boss is provided at the end of the mounting head, and the diameter of the boss is larger than the diameter of the mounting head, larger than the diameter of the small diameter hole of the second stepped hole, and smaller than the diameter of the large diameter hole of the second stepped hole; the diameter of the mounting head is smaller than the diameter of the small diameter hole of the second stepped hole; the length of the large diameter hole of the second stepped hole is larger than the thickness of the boss.

[0012] Furthermore, a plurality of heating holes are provided on the circumference of the clamping slider, and heating elements are provided in the heating holes, and the heating elements are used to achieve heat preservation of the stretching die.

[0013] Furthermore, the surfaces of the two groups of columns on the lower side are provided with a first guide rail, and each group of the first guide rails is slidably connected with a first sliding block and a second sliding block, the first sliding block is connected to the driving slider, and the second sliding block is connected to the clamping slider; the bottom surfaces of the two groups of columns on the upper side are provided with a second guide rail, and each group of the second guide rails is slidably connected with a third sliding block and a fourth sliding block, the third sliding block is connected to the driving slider, and the fourth sliding block is connected to the clamping slider; the outer side of the second guide rail is set as a first inclined surface, and the first inclined surface is inclined outward from bottom to top; the bottom surface of the second guide rail is a plane; the outer sides of the third sliding block and the fourth sliding block are provided with a second inclined surface matching the first inclined surface, and the bottom surfaces of the third sliding block and the fourth sliding block are planes.

[0014] The beneficial effects of this technical solution are as follows: ① In this technical solution, by providing a roughing punch and a stretching punch, and using a punch switching cylinder to drive the roughing punch and the stretching punch to move vertically, the corresponding punches are moved to the working position, enabling rapid conversion between the roughing or extrusion process. Furthermore, the use of a clamping structure allows the removal and installation of the stretching die, allowing for rapid replacement of the stretching punch. When replacing the stretching die, it is only necessary to remove the stretching die from the first guide hole of the clamping slider and insert another stretching die, achieving a rapid mold switching function, reducing mold change time, reducing the flow time between workpiece processes, and reducing the temperature drop of the workpiece. The guide sleeve is detachably connected to the clamping slider, so another guide sleeve can be quickly removed and installed. Therefore, in this technical solution, the guide sleeve, stretching punch, and stretching die can be quickly replaced and quickly adapted to different types of parts. ② A heating element is provided in the clamping slider to achieve mold insulation, ensure the workpiece temperature during forming, and ensure the controllability of process parameters. ③ Use guide sleeves and movable joints to ensure that the stretching punch maintains a high degree of coaxiality with the stretching die during extrusion, so as to ensure that the product has a more uniform wall thickness after extrusion. ④ The support assembly can support and adjust the stretching punch to ensure the coaxiality of the stretching punch. ⑤ Since it is quickly extruded on a single device and the switching time of the intermediate workstation is short, cleaning the oxide scale before loading the blank can ensure that only less oxide scale is produced later, thereby improving product quality. ⑥ The outer side of the second guide rail is set as a first bevel, and the outer sides of the third sliding block and the fourth sliding block are provided with a second bevel that matches the first bevel. This design can adapt to thermal deformation under high temperature and ensure that the hydraulic press drive slider is not stuck under high temperature radiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of a large-scale long-cylinder multi-station horizontal extrusion hydraulic press according to the present invention;

[0016] Figure 2 for Figure 1 The main view;

[0017] Figure 3 for Figure 1 A top view of

[0018] Figure 4 for Figure 3 Middle AA section view;

[0019] Figure 5 for Figure 4 Magnified image of;

[0020] Figure 6 for Figure 1 A cross-sectional view of the movable joint;

[0021] Figure 7 for Figure 1 Schematic diagram of the structure of the middle support assembly and the punch assembly;

[0022] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0023] Figure 9 for Figure 2 Middle CC section view. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] 1 , a first pressing block 37 , a second pressing block 38 , a third pressing block 39 , a first inclined plane 20 , a second inclined plane 21 , an ejector rod 22 , a die base 23 , a drawing die 24 , a workpiece 25 , a limit seat 26 , a die 27 , a guide sleeve 28 , a heating element 29 , a support seat 30 , a mounting seat 31 , a support cylinder 32 , a mounting head 33 , a floating head 34 , a connecting block 35 , a mounting protrusion 36 , a first pressure block 37 , a second pressure block 38 , a boss 39 , a threaded hole 40 , a guide rod 41 , a second sliding block 42 , and a fourth sliding block 43 .

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The embodiment is basically as shown in the attached Figure 1-9 As shown: A large long cylindrical multi-station horizontal extrusion hydraulic press, including a base 1, columns 4, a front beam 2, a rear beam 3, a driving slider 7, a return cylinder 6, a main cylinder 5, an ejection structure, a support assembly, a punch assembly and a die assembly; the base 1 is used to support the front beam 2 and the rear beam 3; there are four groups of columns 4, and the columns 4 are fixed between the front beam 2 and the rear beam 3; the four groups of columns 4 form a working space; the main cylinder 5 and the return cylinder 6 are used to drive the driving slider 7 to reciprocate.

[0028] like Figure 7As shown, the punch assembly includes a punch structure, a slide 12, a slide 11 and a punch switching cylinder 15. The slide 11 is fixed on the driving slider 7, and the punch switching cylinder 15 is fixed on the slide 11; the punch structure is arranged on the slide 12; the slide 12 is vertically slidably connected to the slide 11; the punch structure includes a roughing punch 13 and a stretching punch 14; the stretching punch 14 is located below the roughing punch 13, and the punch switching cylinder 15 is used to drive the slide 12 to move vertically.

[0029] like Figure 4 、 5 As shown, the mold assembly includes a drawing die 24 and a clamping structure. The clamping structure is used to mount the drawing die 24; the drawing punch 14 matches the drawing die 24. The clamping structure includes a clamping cylinder 10, a die base 23, a clamping slide 8, and a guide sleeve 28. The die base 23 and the clamping cylinder 10 are fixed to the front beam 2. The clamping cylinder 10 is used to drive the clamping slide 8 to move. The clamping slide 8 is horizontally connected to the column 4. The clamping slide 8 is provided with a horizontal first guide hole. The clamping slide 8 is provided with a plurality of heating holes along its circumference. The heating holes are provided with heating elements 29. The heating elements 29 are used to achieve heat insulation of the drawing die 24. The drawing die 24 includes a mold 27 and a limit seat 26 fixed to one side of the mold 27. The first guide hole is used to guide the mold 27. The mold 27 can move within the first guide hole along the length of the first guide hole. The two sides of the limit seat 26 can abut against the mold base 23 and the clamping slide 8. The guide sleeve 28 and the limit seat 26 are located on either side of the clamping slide 8, respectively. The mold 27 can abut against the bottom of the guide sleeve 28. The guide sleeve 28 is fixed to the clamping slide 8 and is provided with a second guide hole for guiding the stretch punch 14. The stretch punch 14 enters the mold 27 after passing through the second guide hole.

[0030] The stretching die 24, the stretching punch 14 and the guide sleeve 28 correspond to each other one by one and are respectively provided in multiple groups; the stretching punch 14 is detachably connected to the slide 12; the guide sleeve 28 is detachably connected to the clamping slider 8, specifically by a bolt connection; the external structure, size and shape of several stretching dies 24 are the same, and the external structure, size and shape of several guide sleeves 28 are the same.

[0031] The stretching punch 14 is movably connected to the slide 12. Specifically, the stretching punch 14 is movably connected to the slide 12 via a movable joint. Figure 6As shown, the movable joint includes a mounting head 33, a floating head 34, and a clamping structure. The right side of the floating head 34 is designed in an arc shape. The slide 12 is provided with a connecting hole, and the floating head 34 has freedom of movement within the connecting hole. The left side of the floating head 34 is fixed to the mounting head 33. Specifically, the mounting head 33 and the floating head 34 are connected by a connecting block 35. The center of the connecting block 35 is provided with a second stepped hole. The large diameter hole of the second stepped hole is internally threaded. The left side of the floating head 34 is provided with an external thread, and the connecting block 35 and the floating head 34 can be threadedly connected by the external and internal threads. A boss 39 is provided at the right end of the mounting head 33. The diameter of the boss 39 is larger than the diameter of the mounting head 33, larger than the diameter of the small diameter hole of the second stepped hole, and smaller than the diameter of the large diameter hole of the second stepped hole. The diameter of the mounting head 33 is smaller than the diameter of the small diameter hole of the second stepped hole. The length of the large diameter hole of the second stepped hole is greater than the thickness of the boss 39.

[0032] A mounting cavity is provided in the floating head 34 ; the pressing structure is used to press the stretching die 24 into the mounting cavity. The clamping structure includes a first pressure block 37, a second pressure block 38 and a tightening threaded member; a first stepped hole is provided at the center of the first pressure block 37, and a mounting protrusion 36 is provided on the stretching punch 14; the diameter of the mounting protrusion 36 is larger than the diameter of the small diameter hole of the first stepped hole and smaller than the diameter of the large diameter hole of the first stepped hole, and the stretching punch 14 can be inserted into the small diameter hole of the first stepped hole; the outer periphery of the first pressure block 37 is set as a frustum structure, and the small diameter end of the frustum structure is away from the bottom of the mounting cavity; a tapered hole that can match the frustum structure is provided in the second pressure block 38; a first channel that can pass through the stretching die 24 is provided on the second pressure block 38, and a second channel that can pass through the stretching die 24 is provided on the mounting head 33, and the opening area of ​​the second channel is smaller than the opening area of ​​the first channel; a plurality of threaded holes 40 are provided on the mounting head 33, and the tightening threaded member is threadedly connected to the threaded hole 40 and can tighten the second pressure block 38, the first pressure block 37 and the mounting protrusion 36 in the mounting cavity.

[0033] like Figure 7 、 9 As shown, the support assembly is mounted on the column 4 and is used to support the stretch punch 14. The support assembly includes a mounting base 31, a support cylinder 32, and a support base 30. The mounting base 31 is fixed to the drive slider 7. The support cylinder 32 is mounted on the mounting base 31. The support cylinder 32 is used to drive the support base 30 to move vertically. A guide rod 41 is vertically slidably connected to the mounting base 31, and the upper end of the guide rod 41 is fixed to the support base 30.

[0034] like Figure 4 、 5As shown, the ejection structure includes an ejection cylinder 9 and an ejection rod 22. The ejection cylinder 9 is fixed on the front beam 2. Ejection holes are provided on the die base 23 and the stretching die 24. The ejection cylinder 9 is used to drive the ejection rod 22 to move horizontally. The ejection rod 22 can be inserted into the ejection holes on the die base 23 and the stretching die 24 and eject the workpiece 25 in the stretching die 24.

[0035] like Figure 7-9 As shown, the surfaces of the two groups of columns 4 on the lower side are provided with a first guide rail 16, and each group of first guide rails 16 is slidably connected with a first sliding block 17 and a second sliding block 42, the first sliding block 17 is connected to the driving slider 7, and the second sliding block 42 is connected to the clamping slider 8; the bottom surfaces of the two groups of columns 4 on the upper side are provided with a second guide rail 18, and each group of second guide rails 18 is slidably connected with a third sliding block 19 and a fourth sliding block 43, the third sliding block 19 is connected to the driving slider 7, and the fourth sliding block 43 is connected to the clamping slider 8; the outer side of the second guide rail 18 is set as a first inclined surface 20, and the first inclined surface 20 is inclined outward from bottom to top; the bottom surface of the second guide rail 18 is a plane; the outer sides of the third sliding block 19 and the fourth sliding block 43 are provided with a second inclined surface 21 matching the first inclined surface 20, and the bottom surfaces of the third sliding block 19 and the fourth sliding block 43 are planes.

[0036] The specific implementation process is as follows:

[0037] Initially, the roughing punch 13 is in the working position, and the stretching die 24 is inserted into the first guide hole of the clamping die slide 8. The clamping die slide 8 presses the limit seat 26 against the die base 23. The main cylinder 5 drives the driving slide 7 to move, and the driving slide 7 drives the roughing punch 13 to move through the slide 11 and the slide 12 to achieve roughing of the workpiece 25. After the roughing is completed, the return cylinder 6 drives the driving slide 7, the slide 11 and the slide 12 to reset, and the punch switching cylinder 15 drives the slide 12 to rise vertically until the stretching punch 14 is in the working position. During this process, the support cylinder 32 drives the support seat 30 to rise with the stretching punch 14 to support the stretching punch 14. During extrusion, the main cylinder 5 drives the driving slide 7 to move, and the driving slide 7 drives the stretching punch 14 to move through the slide 11 and the slide 12. The stretching punch 14 cooperates with the stretching die 24 to extrude the workpiece 25. During this process, the heating element 29 is turned on to heat the clamping slider 8, thereby keeping the drawing die 24 warm. During this process, the support cylinder 32 drives the support seat 30 to move downward to avoid interference.

[0038] When replacing the stretching die 24, the clamping cylinder 10 drives the clamping slide 8 and the stretching die 24 away from the die base 23. The stretching die 24 is then removed from the clamping slide 8 and the guide sleeve 28 is removed from the clamping slide 8. The corresponding guide sleeve 28 is then bolted onto the clamping slide 8. The corresponding stretching die 24 is then inserted into the first guide hole of the clamping slide 8.

[0039] When replacing the stretch punch 14, unscrew the connecting block 35 from the floating head 34 and remove the abutting screws, thereby separating the mounting head 33 from the floating head 34 and removing the first pressing block 37, the second pressing block 38, and the stretch punch 14 from the mounting cavity. Then, insert the first pressing block 37 and the second pressing block 38 onto another stretch punch 14, ensuring that the mounting protrusion 36 on the stretch punch 14 is located within the large-diameter hole of the first stepped hole. The second pressing block 38 is then installed on the frustum of the first pressing block 37. The first pressing block 37 and the second pressing block 38 are then placed in the mounting cavity. The connecting block 35 is then used to secure the mounting head 33 and the floating head 34. The abutting screws are then used to press the first pressing block 37, the second pressing block 38, and the mounting protrusion 36 into the mounting cavity.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0041] The above is only an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A large-scale long cylindrical multi-station horizontal extrusion hydraulic press, comprising a base (1), columns (4), a front beam (2), a rear beam (3), a driving slide (7), a return cylinder (6) and a main cylinder (5); the base (1) is used to support the front beam (2) and the rear beam (3); the columns (4) are provided in four groups, and the columns (4) are fixed between the front beam (2) and the rear beam (3); the four groups of columns (4) form a working space; the main cylinder (5) and the return cylinder (6) are used to drive the driving slide (7) to reciprocate; and the characteristics are: It also includes a punch assembly and a die assembly; the punch assembly includes a punch structure, a slide (12), a slide (11) and a punch switching cylinder (15); the slide (11) is fixed on the driving slider (7), and the punch switching cylinder (15) is fixed on the slide (11); the punch structure is arranged on the slide (12); the slide (12) is vertically slidably connected to the slide (11); the punch structure includes a roughing punch (13) and a stretching punch (14); the punch switching cylinder (15) is used to drive the slide (12) to move vertically; the die assembly includes a stretching die (24) and a clamping die structure; the clamping die structure is used to install the stretching die (24); the stretching punch (14) matches the stretching die (24); The clamping structure comprises a clamping cylinder (10), a die base (23), a clamping slider (8) and a guide sleeve (28); the die base (23) and the clamping cylinder (10) are fixed on the front beam (2); the clamping cylinder (10) is used to drive the clamping slider (8) to move; the clamping slider (8) is horizontally slidably connected to the column (4); a horizontal first guide hole is provided on the clamping slider (8); the stretching die (24) comprises a die (27) and a limit seat (26) fixed on one side of the die (27); the first guide hole is used to guide the die (27); the die (27) can The mold (27) can move in the first guide hole along the length direction of the first guide hole; the two sides of the limit seat (26) can abut against the mold base (23) and the clamping slider (8); the guide sleeve (28) and the limit seat (26) are respectively located on both sides of the clamping slider (8), and the mold (27) can abut against the bottom of the guide sleeve (28); the guide sleeve (28) is fixed on the clamping slider (8); the guide sleeve (28) is provided with a second guide hole for guiding the stretching punch (14); the stretching punch (14) enters the mold (27) after passing through the second guide hole.

2. A large-scale long cylindrical multi-station horizontal extrusion hydraulic press according to claim 1, characterized in that: The invention also includes an ejection structure; the ejection structure includes an ejection cylinder (9) and an ejection rod (22); the ejection cylinder (9) is fixed on the front beam (2); the die base (23) and the stretching die (24) are both provided with ejection holes; the ejection cylinder (9) is used to drive the ejection rod (22) to move horizontally; the ejection rod (22) can be inserted into the ejection holes on the die base (23) and the stretching die (24) and eject the workpiece (25) in the stretching die (24).

3. The large-scale long cylindrical multi-station horizontal extrusion hydraulic press according to claim 1, characterized in that: The stretching die (24), the stretching punch (14) and the guide sleeve (28) correspond to each other and are respectively provided in multiple groups; the stretching punch (14) is detachably connected to the slide seat (12); the guide sleeve (28) is detachably connected to the clamping slider (8); the structure, size and shape of the exterior of the multiple groups of the stretching dies (24) are the same, and the structure, size and shape of the exterior of the multiple groups of the guide sleeves (28) are the same.

4. A large-scale long cylindrical multi-station horizontal extrusion hydraulic press according to claim 3, characterized in that: The invention also includes a support assembly, wherein the stretching punch (14) is movably connected to the slide (12), and the support assembly is installed on the column (4) and is used to support the stretching punch (14); the support assembly includes a mounting seat (31), a support cylinder (32) and a support seat (30); the mounting seat (31) is fixed on the driving slider (7); the support cylinder (32) is installed on the mounting seat (31); and the support cylinder (32) is used to drive the support seat (30) to move vertically.

5. The large-scale long cylindrical multi-station horizontal extrusion hydraulic press according to claim 4, characterized in that: The stretching punch (14) and the slide (12) are movably connected via a movable joint; the movable joint includes a mounting head (33), a floating head (34) and a clamping structure; one side of the floating head (34) is set to be arc-shaped; a connecting hole is provided on the slide (12); the floating head (34) has freedom of movement in the connecting hole; the other side of the floating head (34) is fixed to the mounting head (33); a mounting cavity is provided in the floating head (34); the clamping structure is used to press the stretching die (24) in the mounting cavity.

6. The large-scale long cylindrical multi-station horizontal extrusion hydraulic press according to claim 5, characterized in that: The clamping structure includes a first clamping block (37), a second clamping block (38) and a tightening screw; a first stepped hole is provided at the center of the first clamping block (37), and a mounting protrusion (36) is provided on the stretching punch (14); the diameter of the mounting protrusion (36) is larger than the diameter of the small diameter hole of the first stepped hole and smaller than the diameter of the large diameter hole of the first stepped hole, and the stretching punch (14) can be inserted into the small diameter hole of the first stepped hole; the outer periphery of the first clamping block (37) is set as a frustum structure, and the small diameter end of the frustum structure is away from the mounting cavity The bottom of the second pressing block (38) is provided with a tapered hole capable of matching the truncated cone structure; the second pressing block (38) is provided with a first channel capable of passing through the drawing die (24); the mounting head (33) is provided with a second channel capable of passing through the drawing die (24), and the opening area of ​​the second channel is smaller than the opening area of ​​the first channel; the mounting head (33) is provided with a threaded hole (40), and the tightening screw is threadedly connected to the threaded hole (40) and can tighten the second pressing block (38) in the mounting cavity.

7. The large-scale long cylindrical multi-station horizontal extrusion hydraulic press according to claim 5, characterized in that: The mounting head (33) and the floating head (34) are connected via a connecting block (35); a second stepped hole is provided at the center of the connecting block (35); an internal thread is provided in the large diameter hole of the second stepped hole, and an external thread is provided on the outside of the floating head (34); the connecting block (35) and the floating head (34) can be threadedly connected via the external and internal threads; a boss (39) is provided at the end of the mounting head (33), the diameter of the boss (39) is larger than the diameter of the mounting head (33), larger than the diameter of the small diameter hole of the second stepped hole and smaller than the diameter of the large diameter hole of the second stepped hole; the diameter of the mounting head (33) is smaller than the diameter of the small diameter hole of the second stepped hole; the length of the large diameter hole of the second stepped hole is larger than the thickness of the boss (39).

8. The large-scale long cylindrical multi-station horizontal extrusion hydraulic press according to claim 1, characterized in that: A plurality of heating holes are provided in the circumference of the clamping die slider (8), and a heating element (29) is provided in the heating hole. The heating element (29) is used to achieve heat preservation of the stretching die (24).

9. The large-scale long cylindrical multi-station horizontal extrusion hydraulic press according to claim 1, characterized in that: The surfaces of the two groups of columns (4) on the lower side are both provided with a first guide rail (16), and each group of the first guide rail (16) is slidably connected to a first sliding block (17) and a second sliding block (42), the first sliding block (17) is connected to the driving slider (7), and the second sliding block (42) is connected to the clamping slider (8); the bottom surfaces of the two groups of columns (4) on the upper side are both provided with a second guide rail (18), and each group of the second guide rail (18) is slidably connected to a third sliding block (19) and a fourth sliding block (43), the third sliding block (19 ) is connected to the driving slider (7), and the fourth sliding block (43) is connected to the clamping slider (8); the outer side of the second guide rail (18) is set as a first inclined surface (20), and the first inclined surface (20) is inclined outward from bottom to top; the bottom surface of the second guide rail (18) is a plane; the outer sides of the third sliding block (19) and the fourth sliding block (43) are provided with a second inclined surface (21) matching the first inclined surface (20), and the bottom surfaces of the third sliding block (19) and the fourth sliding block (43) matching the bottom surface of the second guide rail (18) are planes.

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