Oil cylinder piston guide ring pressing device and guide ring pressing method

Abstract

The present invention relates to the technical field of oil cylinders, and in particular to an oil cylinder piston guide ring pressing device and a guide ring pressing method, comprising a pressing oil cylinder, an ejection oil cylinder, and a rotary power mechanism; the ejection oil cylinder is arranged at the end of the pressing oil cylinder, and the rotary power mechanism is arranged at the bottom of the ejection oil cylinder and connected through a servo system driving mechanism; a rotating shaft passes through the piston rod of the ejection oil cylinder, a positioning seat is arranged at the upper end of the rotating shaft, and the lower end of the rotating shaft is connected to the rotary power mechanism; a piston rough blank, a prefabricated copper ring and a mold are arranged above the positioning seat; the piston rough blank, the prefabricated copper ring and the mold are movably connected; the lower chamber of the pressing oil cylinder is connected to the lower chamber of the ejection oil cylinder through a high-pressure manifold; and a hydraulic one-way valve is arranged at the high-pressure manifold. Pressing the prefabricated copper ring into the groove of the piston rough blank replaces the copper welding process in the traditional process. It greatly saves its time cost and improves production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of oil cylinders, and in particular to an oil cylinder piston guide ring pressing device and a guide ring pressing method. Background Art

[0002] The functions of existing piston guide rings in oil cylinders mainly include sealing, heat conduction, oil control, support and guidance. At present, there are also many piston guide rings made of composite materials, which have the advantages of low cost and good interchangeability; but this kind of guide ring is often soft in texture, and has the disadvantages of poor high pressure resistance, poor wear resistance and support capacity, and is not suitable for long-stroke oil cylinder applications. The traditional method of processing oil cylinder piston guide rings is to first machine a groove on the piston rough blank, and then melt copper in the groove by welding; after the copper welding is completed, it is necessary to wait for the workpiece to cool before secondary finishing. The following problems exist in the traditional processing method of oil cylinder piston guide rings:

[0003] 1. As the diameter of the piston increases, the volume of copper that needs to be melted in the groove also increases. The melting time is long, which will lead to low efficiency of this processing process;

[0004] 2. The quality of copper welding depends on the skill level of the operator. The stability of welding quality is poor and its labor cost is high.

[0005] 3. The surface of the welded copper is relatively rough and uneven, so a large machining allowance needs to be reserved, which not only increases the cost of consumables, but also requires a large amount of secondary finishing, reducing the overall efficiency of the piston guide ring.

[0006] In view of the above technical defects, the present invention provides a guide ring pressing device and a guide ring pressing method for a cylinder piston, which presses a prefabricated copper ring into the groove of a piston rough blank, replacing the copper welding process in the traditional process, greatly saving its time cost and improving production efficiency. Summary of the invention

[0007] The purpose of the present invention is to solve the problems existing in the prior art and to propose a cylinder piston guide ring pressing device and a guide ring pressing method.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A cylinder piston guide ring pressing device, the cylinder piston guide ring pressing device includes a pressing cylinder, an ejection cylinder, and a rotating power mechanism; the ejection cylinder is arranged at the end of the pressing cylinder, the rotating power mechanism is arranged at the bottom of the ejection cylinder and is connected through a servo system driving mechanism; a rotating shaft passes through the piston rod of the ejection cylinder, a positioning seat is arranged at the upper end of the rotating shaft, and the lower end of the rotating shaft is connected to the rotating power mechanism; a piston rough blank, a prefabricated copper ring and a mold are arranged above the positioning seat; the piston rough blank, the prefabricated copper ring and the mold are movably connected; the lower chamber of the pressing cylinder and the lower chamber of the ejection cylinder are connected through a high-pressure manifold; a hydraulic one-way valve is arranged at the high-pressure manifold;

[0010] The pressure-covering oil cylinder comprises an upper cylinder body, a pressure-covering cylinder piston rod, and a lower cylinder body; a pressure-covering cylinder cover is arranged above the upper cylinder body, a pressure-covering cylinder lower piston is arranged at the end of the pressure-covering cylinder piston rod, and the pressure-covering cylinder piston rod and the pressure-covering cylinder lower piston are tightened by a piston cap;

[0011] A first inner conical surface is arranged inside the cover cylinder cover, and the first inner conical surface is in contact with the upper part of the mold and slides up and down relatively; a second inner conical surface is arranged inside the cover cylinder piston rod, and the second inner conical surface is in contact with the lower part of the mold and slides up and down relatively;

[0012] The mold includes a mold outer ring and multiple mold top blocks. Two adjacent mold top blocks are connected by elastic objects and are evenly distributed in a circle on a horizontal plane. A mold pressure head matching the size of the mold top block is arranged on the inner side of the mold top block.

[0013] The guide ring pressing method of the oil cylinder piston guide ring pressing device comprises the following steps:

[0014] S1, the longitudinal oblique conical surface 1 and the longitudinal oblique conical surface 2 of the mold top block are respectively fitted with the first inner conical surface inside the cylinder head of the pressure cylinder and the second inner conical surface inside the piston rod of the pressure cylinder;

[0015] S2. When the pressing oil cylinder is pushed out, the mold is clamped in the horizontal direction, and the mold moves in the vertical direction to press the prefabricated copper ring into the groove of the piston rough blank;

[0016] S3. Set the upward movement distance of the mold to 1 / 2 of the ejection distance of the pressure cylinder;

[0017] S4, align the die pressure head and the prefabricated copper ring with the groove of the piston rough blank, and keep the ejection cylinder and the covering pressure cylinder moving;

[0018] S5. The follow-up stroke of the ejection cylinder is synchronously maintained at 1 / 2 of the ejection stroke of the covering cylinder.

[0019] Furthermore, the inner ring of the mold outer ring is provided with tooth blocks of the same number as the mold top block, and a groove is provided on the back of each mold top block; the tooth blocks and the grooves cooperate and slide relatively; the outer side surfaces of the upper and lower parts of the mold top block are longitudinal inclined cone surface 1 and longitudinal inclined cone surface 2; the first inner cone surface is in contact with the longitudinal inclined cone surface 1 and slides up and down relatively; the second inner cone surface is in contact with the longitudinal inclined cone surface 2 and slides up and down relatively.

[0020] Furthermore, the upper chamber cylinder body is provided with an oil port A, the lower chamber cylinder body 1 is provided with an oil port B, and the upper chamber cylinder body and the lower chamber cylinder body 1 are connected via a sealing groove.

[0021] Further, the S5 includes S51, when the pressure oil cylinder is ejected, the hydraulic oil discharged from the lower chamber cylinder body is transported to the lower chamber of the ejection oil cylinder through the high-pressure manifold for the ejection action of the ejection oil cylinder,

[0022] S52. During the ejection action, the lower chamber cylinder body 1 of the pressure oil cylinder is connected to the lower chamber cylinder body 2 of the ejection oil cylinder, and the two oil cylinders are designed to satisfy the relationship between the ejection stroke of the pressure oil cylinder and the ejection stroke of the ejection oil cylinder: The lower chamber cylinder body 1 of the covering pressure cylinder is connected with the lower chamber cylinder body 2 of the ejecting cylinder, wherein h1 is the ejecting stroke of the covering pressure cylinder, and h2 is the ejecting stroke of the ejecting cylinder.

[0023] Furthermore, the step S2 includes:

[0024] S21, the ejection cylinder drives the positioning seat to be ejected to the position of the feeding guide sleeve;

[0025] S22, loading;

[0026] S23, after loading is completed, the ejector cylinder returns to the initial position;

[0027] S24, the pressing cylinder is pressed, and the mold moves up with the ejection of the pressing cylinder, and the ejection cylinder moves with it;

[0028] S25, after the first pressing is completed, the pressing cylinder retreats, at which point the mold moves downward as the pressing cylinder is pushed out by the elastic object, and at the same time, oil is introduced into the oil port of the ejection cylinder to realize retreat;

[0029] S26, the rotating power mechanism drives the rotating shaft to drive the positioning seat and the workpiece thereon to rotate 22°-25°, and repeat steps S24-S25 to complete the second pressing;

[0030] S27, the rotating power mechanism drives the rotating shaft to drive the positioning seat and the workpiece thereon to rotate another 22°-25°, and repeat steps S24-S25 to complete the third pressing;

[0031] S28, ejection cylinder ejects the workpiece;

[0032] S29, take materials.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] The present invention proposes a guide ring covering pressing device and a guide ring covering pressing method for a cylinder piston. It is particularly important to process a guide copper ring on the cylinder piston, which can be used for a high-pressure cylinder and can improve its wear resistance and better support capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a three-dimensional structural schematic diagram of the oil cylinder piston guide ring pressing device in the present invention;

[0036] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0037] Figure 3 It is a cross-sectional structural schematic diagram of the pressure-covering oil cylinder in the present invention;

[0038] Figure 4 It is a schematic diagram of the three-dimensional structure of the mold in the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the prefabricated copper ring in the present invention;

[0040] Figure 6 It is a schematic diagram of the structure of the prefabricated copper ring and piston rough blank before pressing in the present invention;

[0041] Figure 7 This is a schematic diagram of the rough structure of the piston before pressing in the present invention;

[0042] Figure 8 This is a schematic diagram of the finished product structure after lamination in the present invention;

[0043] In the figure: 1-pressure cylinder; 101-upper chamber cylinder body; 102-pressure cylinder piston rod; 103-lower chamber cylinder body 1; 104-pressure cylinder lower chamber piston; 105-piston cap; 106-feeding guide sleeve; 107-pressure cylinder cover; 2-ejection cylinder; 3-rotational power mechanism; 4-high pressure manifold; 5-hydraulic check valve; 6-mold; 7-piston rough blank; 8-prefabricated copper ring; 601-mold outer ring; 602-mold top block; 603-mold pressure head; 604-elastic object; 605-tooth block; 606-groove; 9-positioning seat; 10-rotating shaft. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 work are within the scope of protection of the present invention.

[0045] The present invention designs a cylinder piston guide ring pressing device, such as Figure 5 As shown, the use of this equipment to process the oil cylinder piston guide ring requires a prefabricated copper ring 8, which can be cut by purchasing prefabricated copper tubes, which is also quite convenient. Figure 6-Figure 8 As shown, when the piston rough blank 7 is processing the guide ring groove 606, Figure 7 As shown in FIG. 6 , it is necessary to process a barb at the bottom of the groove 606 so that the prefabricated copper ring 8 can fit better after being pressed into the groove 606. Figure 8 As shown in the figure, it is the finished product state diagram after the copper ring is covered and pressed. Due to the properties of copper itself, copper is ductile and is a soft metal, which will produce certain deformation after covering and pressing.

[0046] Example 1, in this example, a cylinder piston guide ring pressing device, see Figure 1 Combination Figure 2 In the embodiment, the covering pressure cylinder 1, the ejection cylinder 2 and the rotary power mechanism 3 are included; the covering pressure cylinder 1 usually refers to a hydraulic cylinder used to provide covering pressure in a mechanical device in this embodiment. It is driven by a hydraulic system and can generate linear thrust or pulling force to achieve a specific mechanical action or apply a specific pressure. In different mechanical equipment, the specific purpose and working mode of the covering pressure cylinder may be different. In some presses, stamping equipment, construction machinery, etc., the covering pressure cylinder may play an important role. In this embodiment, the ejection cylinder 2 is arranged at the end of the covering pressure cylinder 1, and the rotating power mechanism 3 is arranged at the bottom of the ejection cylinder 2 and connected through the servo system drive mechanism; a rotating shaft 10 passes through the piston rod of the ejection cylinder 2, and a positioning seat 9 is arranged at the upper end of the rotating shaft 10, and the lower end of the rotating shaft 10 is connected to the rotating power mechanism 3; a piston blank 7, a prefabricated copper ring 8 and a mold 6 are arranged above the positioning seat 9; the piston blank 7, the prefabricated copper ring 8 and the mold 6 are movably connected, and the lower cavity of the covering pressure cylinder 1 and the lower cavity of the ejection cylinder 2 are connected through a high-pressure manifold 4; a hydraulic one-way valve 5 is provided at the high-pressure manifold 4 to control the oil inlet or oil outlet of the oil port 2.

[0047] Example 2, please continue to see Figure 3In the embodiment, the covering pressure oil cylinder 1 includes an upper cylinder body 101, a covering pressure cylinder piston rod 102, and a lower cylinder body 103; a covering pressure cylinder cylinder cover 107 is arranged above the upper cylinder body 101, and a covering pressure cylinder lower chamber piston 104 is arranged at the end of the covering pressure cylinder piston rod 102, the covering pressure cylinder piston rod 102 and the covering pressure cylinder lower chamber piston 104 are tightened by a piston cap 105, and a first inner conical surface is arranged inside the covering pressure cylinder cylinder cover 107, and the first inner conical surface is in contact with the upper part of the mold 6 and slides up and down relatively; a second inner conical surface is arranged inside the covering pressure cylinder piston rod 102; the second inner conical surfaces are respectively in contact with the lower part of the mold 6 and slide up and down relatively.

[0048] Example 3, based on the above Example 2, please continue to refer to Figure 3 In the embodiment, an oil port A is provided in the upper cylinder body 101, and an oil port B is provided in the lower cylinder body 103. The upper cylinder body 101 and the lower cylinder body 103 are connected by a sealing groove. In this embodiment, the working principle of the pressure cylinder 1 is as follows: when oil enters the oil port A of the upper cylinder body 101, the pressure cylinder piston rod 102 moves upward, and drives the mold 6 to move upward and clamp in the horizontal direction. When oil enters the oil port B of the lower cylinder body 103, the pressure cylinder piston rod 102 moves downward, and the mold 6 expands and loosens outward in the horizontal direction due to the action of the elastic object 604.

[0049] Example 4, based on the above Example 1, please refer to Figure 4 In the embodiment, the mold 6 includes a mold outer ring 601 and 8 mold top blocks 602, wherein two adjacent mold top blocks 602 are connected by elastic objects 604 and are evenly distributed in a circle in a horizontal plane; a mold pressing head 603 matching the size of the mold top block 602 is arranged on the inner side of the mold top block 602, and mold pressing heads 603 of different specifications can be designed for interchangeability when the oil cylinder piston guide rings of different outer diameters are pressed; 8 tooth blocks 605 of the same number as the mold top block 602 are arranged on the inner ring of the mold outer ring 601, and a groove 606 is arranged on the back side of each of the mold top blocks 602; the tooth blocks 605 and the grooves 606 cooperate and slide relatively, and the tooth blocks 605 can be pressed in the grooves 606 on the back side of the mold top block 602, and play a guiding and outer hoop role on the mold top block 602 to prevent the elastic object 604 from slipping off. The elastic object 604 is a spring in this embodiment.

[0050] In Example 5, the outer side surfaces of the upper and lower parts of the mold top block 602 are longitudinal oblique conical surface 1 and longitudinal oblique conical surface 2; the first inner conical surface is in contact with the longitudinal oblique conical surface 1 and slides up and down relatively; the second inner conical surface is in contact with the longitudinal oblique conical surface 2 and slides up and down relatively.

[0051] Embodiment 6, a cylinder piston guide ring pressing device and a guide ring pressing method as described in any one of the above, comprising the following steps:

[0052] S1, the longitudinal oblique conical surface 1 and the longitudinal oblique conical surface 2 of the mold top block 602 are respectively fitted with the first inner conical surface inside the pressure cylinder cover 107 and the second inner conical surface inside the pressure cylinder piston rod 102;

[0053] S2, when the pressing oil cylinder 1 is pushed out, the mold 6 is clamped in the horizontal direction, and the mold 6 moves in the vertical direction to press the prefabricated copper ring 8 into the groove 606 of the piston rough blank 7;

[0054] S3, set the upward moving distance of the mold 6 to 1 / 2 of the ejection distance of the pressure cylinder 1;

[0055] S4, align the die pressing head 603 and the prefabricated copper ring 8 with the groove 606 of the piston rough blank 7, and keep the ejection cylinder 2 and the covering pressure cylinder 1 moving with each other;

[0056] S5. The follow-up stroke of the ejection cylinder 2 is synchronously maintained at 1 / 2 of the ejection stroke of the covering pressure cylinder 1.

[0057] Embodiment 7, the S5 includes S51, when the covering pressure cylinder 1 is ejected, the hydraulic oil discharged from the lower chamber cylinder body 103 is transported to the lower chamber of the ejection cylinder 2 through the high-pressure manifold 4, for the ejection action of the ejection cylinder 2;

[0058] S52, during the ejection action, the lower chamber cylinder body 103 of the covering pressure cylinder 1 is connected with the lower chamber cylinder body 2 of the ejection cylinder 2. Since the ejection cylinder 2 and the covering pressure cylinder 1 should keep the same speed during the following process, the hydraulic oil in the lower chamber of the covering pressure cylinder 1 cannot be completely discharged to the lower chamber of the ejection cylinder 2, and part of the hydraulic oil will be discharged through the oil port B of the covering pressure cylinder 1. A hydraulic proportional valve can be installed at the oil port B of the covering pressure cylinder 1 for adjustment, and the two cylinders are designed to meet the relationship between the ejection stroke of the covering pressure cylinder 1 and the ejection stroke of the ejection cylinder 2: , where h1 is the ejection stroke of the pressure cylinder 1, and h2 is the ejection stroke of the ejection cylinder 2.

[0059] Embodiment 8, in the above step S2, it includes S21, the ejection oil cylinder 2 drives the positioning seat 9 to be ejected to the position of the feeding guide sleeve 106; S22, feeding; 23, after the feeding is completed, the ejection oil cylinder 2 returns to the initial position;

[0060] S24, the pressing cylinder 1 is pressed, and the mold 6 moves upward with the ejection of the pressing cylinder 1, and the ejection cylinder 2 moves with it;

[0061] S25, after the first pressing is completed, the pressing cylinder 1 is retracted, at which point the mold 6 is pushed out by the pressing cylinder 1 through the action of the elastic object 604 and moves downward, and at the same time, the oil port of the ejecting cylinder 2 is filled with oil to realize the retraction;

[0062] S26, the rotating power mechanism 3 drives the rotating shaft 10 to drive the positioning seat 9 and the workpiece thereon to rotate 22°-25°, and repeats the above steps S24-S25 to complete the second pressing; in this embodiment, the rotating power mechanism 3 drives the rotating shaft 10 to drive the positioning seat 9 and the workpiece thereon to rotate 22.5°, and then repeats the above steps S24-S25 to complete the second pressing;

[0063] S27, the rotating power mechanism 3 drives the rotating shaft 10 to drive the positioning seat 9 and the workpiece thereon to rotate another 22°-25°, and repeats the above steps S24-S25 to complete the third pressing; in this embodiment, the rotating power mechanism 3 drives the rotating shaft 10 to drive the positioning seat 9 and the workpiece thereon to rotate another 22.5°, and then continues to repeat the above steps S24-S25 to complete the third pressing;

[0064] S28, ejection cylinder 2 ejects the workpiece;

[0065] S29, take materials.

[0066] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cylinder piston guide ring pressing device, characterized in that: The oil cylinder piston guide ring pressing device comprises a pressing oil cylinder (1), an ejection oil cylinder (2), and a rotary power mechanism (3); the ejection oil cylinder (2) is arranged at the end of the pressing oil cylinder (1), and the rotary power mechanism (3) is arranged at the bottom of the ejection oil cylinder (2) and is connected through a servo system drive mechanism; a rotating shaft (10) passes through the piston rod of the ejection oil cylinder (2), a positioning seat (9) is arranged at the upper end of the rotating shaft (10), and the lower end of the rotating shaft (10) is connected to the rotary power mechanism (3); a piston rough blank (7), a prefabricated copper ring (8) and a mold (6) are arranged above the positioning seat (9); the piston rough blank (7), the prefabricated copper ring (8) and the mold (6) are movably connected; the lower chamber of the pressing oil cylinder (1) and the lower chamber of the ejection oil cylinder (2) are connected through a high-pressure manifold (4); a hydraulic check valve (5) is provided at the high-pressure manifold (4); The pressure-covering oil cylinder (1) comprises an upper cylinder body (101), a pressure-covering cylinder piston rod (102), and a lower cylinder body (103); a pressure-covering cylinder cylinder cover (107) is arranged above the upper cylinder body (101), a pressure-covering cylinder lower piston (104) is arranged at the end of the pressure-covering cylinder piston rod (102), and the pressure-covering cylinder piston rod (102) and the pressure-covering cylinder lower piston (104) are tightened together via a piston cap (105); A first inner conical surface is arranged inside the pressure cylinder cover (107), and the first inner conical surface is in contact with the upper part of the mold (6) and slides up and down relatively to each other; a second inner conical surface is arranged inside the pressure cylinder piston rod (102), and the second inner conical surface is in contact with the lower part of the mold (6) and slides up and down relatively to each other; The mold (6) comprises a mold outer ring (601), a plurality of mold top blocks (602), two adjacent mold top blocks (602) are connected by elastic objects (604) and are evenly distributed in a circle on a horizontal plane; a mold pressing head (603) matching the size of the mold top block (602) is arranged on the inner side of the mold top block (602); The inner ring of the mold outer ring (601) is provided with tooth blocks (605) of the same number as the mold top block (602), and a groove (606) is provided on the back of each mold top block (602); the tooth blocks (605) and the grooves (606) are matched and slide relative to each other; the outer side surfaces of the upper and lower parts of the mold top block (602) are longitudinal oblique cone surface 1 and longitudinal oblique cone surface 2; the first inner cone surface is in contact with the longitudinal oblique cone surface 1 and slides up and down relatively; the second inner cone surface is in contact with the longitudinal oblique cone surface 2 and slides up and down relatively; The guide ring pressing method of the oil cylinder piston guide ring pressing device comprises the following steps: S1, the longitudinal oblique conical surface 1 and the longitudinal oblique conical surface 2 of the mold top block (602) are respectively fitted with the first inner conical surface inside the pressure cylinder cover (107) and the second inner conical surface inside the pressure cylinder piston rod (102); S2, when the pressing oil cylinder (1) is pushed out, the mold (6) is clamped in the horizontal direction, and the mold (6) moves in the vertical direction to press the prefabricated copper ring (8) into the groove (606) of the piston rough blank (7); S3, setting the upward movement distance of the mold (6) to 1 / 2 of the ejection distance of the pressure cylinder (1); S4, aligning the die pressing head (603) and the prefabricated copper ring (8) with the groove (606) of the piston rough blank (7), and keeping the ejection cylinder (2) and the covering pressure cylinder (1) moving in tandem; S5. The follow-up stroke of the ejection cylinder (2) is synchronously maintained at 1 / 2 of the ejection stroke of the covering cylinder (1).

2. The oil cylinder piston guide ring pressing device according to claim 1, characterized in that: The upper chamber cylinder body (101) is provided with an oil port A, and the lower chamber cylinder body (103) is provided with an oil port B. The upper chamber cylinder body (101) and the lower chamber cylinder body (103) are connected via a sealing groove.

3. The oil cylinder piston guide ring pressing device according to claim 1, characterized in that: The S5 includes S51, when the pressure oil cylinder (1) is ejected, the hydraulic oil discharged from the lower chamber cylinder body (103) is transported to the lower chamber of the ejection oil cylinder (2) through the high-pressure manifold (4) for the ejection action of the ejection oil cylinder (2), S52. During the ejection operation, the lower chamber cylinder body 1 (103) of the pressure cylinder (1) is connected to the lower chamber cylinder body 2 of the ejection cylinder (2), and the two cylinders are designed to satisfy the relationship between the ejection stroke of the pressure cylinder (1) and the ejection stroke of the ejection cylinder (2): The lower chamber cylinder body 1 (103) of the covering pressure cylinder (1) is connected to the lower chamber cylinder body 2 of the ejecting cylinder (2), wherein h1 is the ejecting stroke of the covering pressure cylinder (1), and h2 is the ejecting stroke of the ejecting cylinder (2).

4. The oil cylinder piston guide ring pressing device according to claim 1, characterized in that: The step S2 includes: S21, the ejection cylinder (2) drives the positioning seat (9) to be ejected to the position of the feeding guide sleeve (106); S22, loading; S23, after loading is completed, the ejector cylinder (2) returns to its initial position; S24, the pressing cylinder (1) is pressed, and the mold (6) moves upward along with the ejection of the pressing cylinder (1), while the ejection cylinder (2) moves with it; S25, after the first pressing is completed, the pressing cylinder (1) is retracted, at which point the mold (6) is pushed out by the pressing cylinder (1) through the action of the elastic object (604) and moves downward, and at the same time, oil is introduced into the oil port of the ejection cylinder (2), thereby achieving retraction; S26, the rotating power mechanism (3) drives the rotating shaft (10) to drive the positioning seat (9) and the workpiece thereon to rotate 22°-25°, and steps S24-S25 are repeated to complete the second pressing; S27, the rotating power mechanism (3) drives the rotating shaft (10) to drive the positioning seat (9) and the workpiece thereon to rotate by another 22°-25°, and steps S24-S25 are repeated to complete the third pressing; S28, the ejection cylinder (2) ejects the workpiece; S29, take materials.

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