Valve seat ring press-fitting device for engine cylinder cover

Abstract

The valve seat ring press-fitting device comprises a feeding mechanism, a material receiving mechanism, a press-fitting mechanism and a material receiving seat, the material receiving mechanism is arranged on the material receiving seat, the material receiving mechanism is communicated with a discharging port of the feeding mechanism, the material receiving mechanism comprises a left material clamping block and a right material clamping block, and the left material clamping block and the right material clamping block are arranged on the material receiving seat. The left material clamping block and the right material clamping block are both rotationally connected with the material receiving base, a left limiting groove and a right limiting groove are formed in one sides of the opposite ends of the left material clamping block and the right material clamping block correspondingly, the press fitting mechanism comprises a servo press and a pressing rod connected with the servo press, and a control assembly is arranged on the material receiving mechanism. The control assembly and the pressing rod are matched with the corresponding left material clamping block and the corresponding right material clamping block so as to control the left material clamping block and the right material clamping block to be opened and closed on the material receiving base. In this way, the seat ring and the engine cylinder cover can be stably and automatically pressed.

Description

Technical Field

[0001] The invention relates to the technical field of engine cylinder head processing, in particular to a valve seat ring press-fitting device for an engine cylinder head. Background Art

[0002] On the automobile cylinder head assembly line, a large number of assemblies need to be completed by pressing. For example, the valve seat ring on the engine cylinder head needs to be pressed onto the valve step hole on the cylinder head. The pressing quality of the seat ring is crucial. If the pressing is skewed or not in place, it will cause the seat ring hole to be processed slanted or the sealing surface position to be unqualified, the sealing performance of the seat ring will be reduced, air leakage will occur, fuel consumption will increase, and the abnormal wear of the seat ring hole will be accelerated, affecting the performance parameters of the entire engine.

[0003] The conventional press-fitting method of the seat ring is to manually tap and press, make non-standard seat ring press-fitting tools, manually install the seat ring on the press-fitting tools first, and then tap and install them one by one. This method is convenient to operate and low in cost, but low in efficiency. In addition, the press-fitting process has poor controllability, the press-fitting force is uneven, the seat ring is pressed into the bottom hole of the seat ring after being subjected to instantaneous impact, and the press-fitting depth consistency is poor. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a method for stably and automatically pressing a seat ring and an engine cylinder head.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a valve seat ring pressing device for an engine cylinder head, comprising: a feeding mechanism, a receiving mechanism, a pressing mechanism and a receiving seat, the receiving mechanism being arranged on the receiving seat, the receiving mechanism being connected with a material outlet of the feeding mechanism, and being used for carrying the seat ring from the feeding mechanism, the receiving mechanism comprising a left material clamping block and a right material clamping block, both of which are rotatably connected with the receiving seat, a left limiting groove and a right limiting groove are respectively provided on one side of the opposite ends of the left material clamping block and the right material clamping block, the left limiting groove and the right limiting groove are arranged relatively and matched with the seat ring, the pressing mechanism comprising a servo press and a pressing rod connected with the servo press, when the seat ring is pressed onto the cylinder head, the servo press drives the pressing rod to pass between the left limiting groove and the right limiting groove and press the seat ring into the cylinder head with the seat ring;

[0006] The material receiving mechanism is provided with a control component, and the control component and the pressure rod cooperate with the corresponding left material clamping block and right material clamping block to control the opening and closing between the left material clamping block and the right material clamping block on the material receiving seat;

[0007] When the pressure rod is not extended and the left clamping block and the right clamping block are in a closed state with the cooperation of the control assembly, the distance between the left limit groove and the right limit groove in the closed state matches the outer diameter of the seat ring;

[0008] When the pressure rod is extended and with the cooperation of the control assembly, the left clamping block and the right clamping block are in an open state, and in the open state, the distance between the left limiting groove and the right limiting groove is greater than the diameter of the seat ring.

[0009] Preferably, the left material clamping block and the right material clamping block are rotatably connected to the material receiving seat via a rotating shaft arranged on the material receiving seat, and the control component includes a spring and a limit pin, one end of the spring abuts against the material receiving seat, and the other end abuts against the end of the corresponding left material clamping block or the right material clamping block away from the discharge port, thereby forcing the left material clamping block and the right material clamping block to be in a closed state at one end, and the limit pin is arranged on the corresponding left material clamping block and the right material clamping block, and when the left material clamping block and the right material clamping block are in a closed state, one end of the limit pin abuts against the material receiving seat, thereby ensuring the minimum spacing between the left limit groove and the right limit groove in the closed state.

[0010] Preferably, the pressure rod comprises a rod portion and a head portion, the diameter of the rod portion is larger than the diameter of the head portion, the head portion matches with the seat ring, and when the head portion of the pressure rod is inserted into the seat ring, the seat ring is placed on the head portion of the pressure rod.

[0011] Preferably, a left roller and a right roller are respectively installed on the left clamping block and the right clamping block, and the minimum spacing between the left roller and the right roller is larger than the outer diameter of the pressure rod head and smaller than the outer diameter of the pressure rod rod. When the head is inserted into the seat ring, the rod contacts the left roller and the right roller, forcing the left roller and the right roller to move the left clamping block and the right clamping block away from each other and be in an open state, thereby avoiding obstruction to the movement of the pressure rod.

[0012] Preferably, a transition portion is provided between the head portion and the stem portion, and an outer diameter of the transition portion is larger than an outer diameter of the head portion and smaller than an outer diameter of the stem portion.

[0013] Preferably, an avoidance gap is provided on the head, the avoidance gap is provided on the side of the head close to the left roller and the right roller, and a transition surface with the left roller and the right roller is provided on the side of the transition portion close to the left roller and the right roller.

[0014] Preferably, a magnet is embedded in the head of the pressure rod, and the magnet is used to adsorb the seat ring onto the head of the pressure rod.

[0015] Preferably, it also includes a material picking assembly arranged in the moving direction of the pressure rod, the material picking assembly includes a material picking cylinder and a material picking claw arranged on the material picking cylinder, the material picking cylinder is arranged on one side of the material receiving seat, and the material picking claw is used to clamp and remove the seat ring that fails to be pressed on the pressure rod.

[0016] Preferably, a bushing is provided in the material receiving seat, and the pressure rod is slidably matched with the bushing.

[0017] The beneficial effects of the present invention are as follows: through the cooperation of the left clamping block, the right clamping block and the control component, the incoming seat ring can be stably received and the stability of the seat ring posture can be guaranteed. In cooperation with the pressure rod, the pressure rod utilizes the changes in the outer diameters of the head, the transition part and the rod part and in cooperation with the control component to control the opening or closing between the left clamping block and the right clamping block, so that the pressure rod carries the seat ring through or receives the next incoming seat ring, and the position of the pressure rod is controlled by the servo press, thereby ensuring the consistency of the pressing depth of the seat ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the positional relationship between the present invention and the equipment in which it is located;

[0019] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the material receiving mechanism, the material removing assembly, and the material receiving seat of the present invention;

[0021] Figure 4 is a cross-sectional view of the material receiving mechanism of the present invention when it is in a closed state;

[0022] Figure 5 is a cross-sectional view of the material receiving mechanism of the present invention when it is in an open state;

[0023] Figure 6 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0024] The markings of the components in the accompanying drawings are as follows:

[0025] 1. Feeding mechanism; 11. Discharging port;

[0026] 2. Material receiving mechanism; 21. Left clamping block; 211. Left limit slot; 212. Left roller; 22. Right clamping block; 221. Right limit slot; 222. Right roller; 23. Rotating shaft;

[0027] 3. Pressing mechanism; 31. Servo press; 32. Pressing rod; 321. Rod portion; 322. Head portion; 3221. Avoidance gap; 323. Transition portion; 3231. Transition surface;

[0028] 4. Material receiving seat;

[0029] 5. Control assembly; 51. Spring; 52. Limit pin;

[0030] 6. Material picking assembly; 61. Material picking cylinder; 62. Material picking claw;

[0031] 7. Bushing;

[0032] 8. Seat ring. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0039] Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0040] Example:

[0041] refer to Figure 1-Figure 6 A valve seat ring press-fitting device for an engine cylinder head comprises: a feeding mechanism 1, a receiving mechanism 2, a press-fitting mechanism 3 and a receiving seat 4, wherein the receiving mechanism 2 is mounted on the receiving seat 4, the receiving mechanism 2 is connected to the discharge port 11 of the feeding mechanism 1, and is used to carry the seat ring 8 from the feeding mechanism 1, the receiving mechanism 2 comprises a left clamping block 21 and a right clamping block 22, the left clamping block 21 and the right clamping block 22 are rotatably connected to the receiving seat 4 through a rotating shaft 23 mounted on the receiving seat 4, and one side of the opposite end of the left clamping block 21 and the right clamping block 22 is respectively provided with The left limiting groove 211 and the right limiting groove 221 are arranged opposite to each other and matched with the seat ring 8. The press-fitting mechanism 3 includes a servo press 31 and a pressing rod 32 connected to the servo press 31. When the seat ring 8 is pressed onto the cylinder head, the servo press 31 drives the pressing rod 32 to pass between the left limiting groove 211 and the right limiting groove 221 and carries the seat ring 8 into the cylinder head. A bushing 7 is installed in the material receiving seat 4. The pressing rod 32 is slidably matched with the bushing 7, so as to keep the pressing rod 32 running stably and smoothly. The servo press 31 is installed on the material receiving seat 4.

[0042] The receiving mechanism 2 is provided with a control assembly 5, and the control assembly 5 is arranged in two groups. Each group of control assembly 5 cooperates with the corresponding left clamping block 21 and right clamping block 22 and the pressure rod 32 to limit the opening and closing between the left clamping block 21 and the right clamping block 22 on the receiving seat 4;

[0043] like Figure 4 As shown, when the pressure rod 32 is not extended and the left clamping block 21 and the right clamping block 22 are in a closed state with the cooperation of the control assembly 5, the distance between the left limiting groove 211 and the right limiting groove 221 in the closed state matches the outer diameter of the seat ring 8.

[0044] like Figure 5 As shown, when the pressure rod 32 is extended and with the cooperation of the control component 5, the left clamping block 21 and the right clamping block 22 are in an open state. In the open state, the distance between the left limit groove 211 and the right limit groove 221 is greater than the diameter of the seat ring 8, thereby not affecting the pressure rod 32 from taking away the seat ring 8.

[0045] refer to Figure 3-Figure 5 The control assembly 5 includes a spring 51 and a limit pin 52. One end of the spring 51 abuts against the material receiving seat 4, and the other end abuts against the end of the corresponding left clamping block 21 or the right clamping block 22 away from the discharge port 11, thereby forcing the ends of the left clamping block 21 and the right clamping block 22 close to the discharge port 11 to approach each other and be in a closed state. The limit pin 52 is installed on the corresponding left clamping block 21 or the right clamping block 22 and when the left clamping block 21 and the right clamping block 22 are in the closed state, one end of the limit pin 52 abuts against the material receiving seat 4, thereby limiting the minimum spacing between the left limit slot 211 and the right limit slot 221 when they are in the closed state through the limit pin 52. At this time The spacing between the left limit groove 211 and the right limit groove 221 is slightly larger than the outer diameter of the seat ring 8, and the width of the left limit groove 211 and the right limit groove 221 matches the width of the seat ring 8. The width of the left limit groove 211 and the right limit groove 221 can be slightly larger than the width of the seat ring 8 without affecting the action of the left clamping block 21 and the right clamping block 22 switching from a closed state to an open state, thereby limiting the position of the seat ring 8 and maintaining the consistency of the position and posture of the seat ring 8 under the joint action of the left limit groove 211 and the right limit groove 221, and then the seat ring 8 falling from the discharge port 11 is jointly supported by the left limit groove 211 and the right limit groove 221.

[0046] Reference 2- Figure 6The pressure rod 32 includes a rod portion 321 and a head portion 322, and the rod portion 321 and the head portion 322 are integrally formed. The diameter of the rod portion 321 is larger than the diameter of the head portion 322, and the outer diameter of the head portion 322 matches the inner diameter of the seat ring 8, so that when the head portion 322 of the pressure rod 32 is inserted into the seat ring 8 and the seat ring 8 is placed on the head portion 322 of the pressure rod 32 under the blocking force of the left limiting groove 211 and the right limiting groove 221, the left roller 212 and the right roller 222 are respectively installed on the left clamping block 21 and the right clamping block 22, and the minimum spacing between the left roller 212 and the right roller 222 is larger than the outer diameter of the head portion 322 of the pressure rod 32 and smaller than the outer diameter of the rod portion 321 of the pressure rod 32. When the rod portion 321 is not in contact with the left roller 212 and the right roller 22 2, the lower left clamping block 21 and the right clamping block 22 are in a closed state, and when the rod portion 321 contacts the left roller 212 and the right roller 222, the lower left clamping block 21 and the right clamping block 22 are in an open state; a transition portion 323 is provided between the head portion 322 and the rod portion 321, the outer diameter of the transition portion 323 is larger than the outer diameter of the head portion 322 and smaller than the outer diameter of the rod portion 321, the outer diameter of the transition portion 323 is slightly larger than the distance between the left roller 212 and the right roller 222 and smaller than the distance between the left roller 212 and the right roller 222 when in the open state, so that when the transition portion 323 contacts the left roller 212 and the right roller 222, it is a transition between the closed state and the open state of the left clamping block 21 and the right clamping block 22.

[0047] Reference 2- Figure 6 In the process of the pressing rod 32 moving toward the seat ring 8, the head 322 of the pressing rod 32 first contacts the seat ring 8 without contacting the left roller 212 and the right roller 222. When the head 322 just contacts the seat ring 8, the side of the transition part 323 contacts the left roller 212 and the right roller 222, so that the left clamping block 21 and the right clamping block 22 begin to open slightly outward. When the head 322 completely penetrates into the inner diameter of the seat ring 8, the rod part 321 contacts the left roller 212 and the right roller 222, so that the left clamping block 21 and the right clamping block 22 are completely opened, so that the left limiting groove 211 and the right limiting groove 221 are completely separated from the seat ring 8, thereby avoiding hindering the pressing rod 32 from moving toward the cylinder head with the seat ring 8. The setting of the transition part 323 makes the process of the pressing rod 32 contacting the seat ring 8 and the process of the pressing rod 32 leaving the material receiving seat 4 with the seat ring 8 more stable and smooth.

[0048] refer to Figure 6In order to further avoid the contact between the head 322 and the left roller 212 and the right roller 222, an avoidance notch 3221 is provided on the head 322. The avoidance notch 3221 is provided on the side of the head 322 close to the left roller 212 and the right roller 222, thereby further reducing the risk of the head 322 contacting the left roller 212 and the right roller 222, thereby ensuring the stability of the position of the seat ring 8 in the left limiting groove 211 and the right limiting groove 221 before the head 322 contacts the seat ring 8;

[0049] In order to make the transition part 323 and the left roller 212 and the right roller 222 more stable and smooth, the side of the transition part 323 close to the left roller 212 and the right roller 222 is provided with a transition surface 3231 with the left roller 212 and the right roller 222, and the outer diameter spacing of the transition surfaces 3231 on both sides gradually increases until it continues to the rod part 321, so that when the left and right rollers 222 contact with the transition part 323, the transition from the closed state to the open state is more stably achieved, and the left clamping block 21 and the right clamping block 22 are slowly and linearly opened, reducing the impact on the seat ring 8 during the opening process;

[0050] A magnet is embedded in the head 322 of the pressure rod 32, and the magnet is used to adsorb the seat ring 8 onto the head 322 of the pressure rod 32. In this way, when the head 322 of the pressure rod 32 just contacts the seat ring 8, there is a preliminary adsorption force of the magnetic force on the seat ring 8, which further reduces the influence of the left clamping block 21 and the right clamping block 22 on the seat ring 8 during the gradual opening process, and also improves the stability of the head 322 of the pressure rod 32 when inserting into the seat ring 8, so that the head 322 is more easily inserted into the inner diameter of the seat ring 8.

[0051] refer to Figure 2 and Figure 3, and also includes a material-removing assembly 6 arranged in the moving direction of the pressure rod 32. The material-removing assembly 6 includes a material-removing cylinder 61 and a material-removing claw 62 installed on the material-removing cylinder 61. The material-removing cylinder 61 can be a finger cylinder. The material-removing cylinder 61 is bolted to one side of the material receiving seat 4. The material-removing claw 62 is used to clamp and remove the seat ring 8 that fails to be pressed on the pressure rod 32. When the pressure rod 32 completes the press-fitting of the seat ring 8, the servo press 31 resets the pressure rod 32. When the head 322 of the pressure rod 32 moves to When the pick-up claw 62 is at the position, the pressing rod 32 stops moving, and the pick-up cylinder 61 controls the clamping action of the pick-up claw 62, that is, the pick-up claw 62 moves closer, but the pick-up claw 62 does not contact the head 322, that is, if there is a seat ring 8 on the head 322, the position of the pick-up claw 62 when it moves closer can clamp the seat ring 8, if there is no seat ring 8 on the head 322, even if the pick-up claw 62 moves closer, it will not contact the head 322, the servo press 31 continues to run to drive the pressing rod 32 to reset in place, and the pick-up claw 62 is reset. By setting the pick-up claw 62, even if the seat ring 8 is still on the head 322 of the pressing rod 32 after the press-fitting fails, the pick-up claw 62 can clamp and discard the seat ring 8, avoiding affecting the pressing rod 32 and the next seat ring 8.

[0052] Operation process: After the manipulator moves the cylinder head to be processed to the designated processing position, the seat ring 8 falls into the space formed by the left limit groove 211 and the right limit groove 221 through the discharge port 11 of the feeding mechanism 1. At this time, the left clamping block 21 and the right clamping block 22 are in a closed state. Then, the servo press 31 drives the pressure rod 32 to move toward the seat ring 8. The head 322 of the pressure rod 32 contacts the seat ring 8 without contacting the left roller 212 and the right roller 222. At the same time, the transition part 323 of the pressure rod 32 contacts the left roller 212 and the right roller 222, thereby forcing the left roller 212 and the right roller 222 to carry the left clamping block 21 and the right clamping block 22, respectively. The material block 22 rotates so that the left limiting groove 211 and the right limiting groove 221 at one end of the left clamping block 21 and the right clamping block 22 close to the receiving and delivering outlet 11 gradually move away from each other. This is a transition state from a closed state to an open state. As the head 322 of the pressure rod 32 extends into the seat ring 8 until it is completely extended into the seat ring 8, the rod portion 321 of the pressure rod 32 has contacted the left roller 212 and the right roller 222, forcing the left clamping block 21 and the right clamping block 22 to reach the maximum open state. At this time, they are in an open state, and then the servo press 31 continues to control the pressure rod 32 to move the seat ring 8 toward the cylinder head until the seat ring 8 is pressed onto the cylinder head. Then the servo press 31 controls the pressure rod 32 to reset, and the head 322 of the pressure rod 32 briefly stops at the material-removing claw 62, and the material-removing claw 62 moves. Then the servo press 31 continues to control the pressure rod 32 to reset. When the pressure rod 32 is no longer in contact with the left roller 212 and the right roller 222, the left clamping block 21 and the right receiving block are forced to approach each other at one end close to the discharge port 11 by the action of the spring 51 until the limit pin 52 contacts the receiving seat 4 and prevents the left clamping block 21 and the right clamping block 22 from approaching each other. At this time, it resets to the closed state, and the servo press 31 controls the pressure rod 32 until it resets in place, and the next cycle starts.

[0053] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A valve seat ring press-fitting device for an engine cylinder head, characterized in that: include: A feeding mechanism (1), a receiving mechanism (2), a pressing mechanism (3) and a receiving seat (4), wherein the receiving mechanism (2) is arranged on the receiving seat (4), the receiving mechanism (2) is connected to the discharge port (11) of the feeding mechanism (1), and is used to carry the seat ring (8) from the feeding mechanism (1), the receiving mechanism (2) comprises a left clamping block (21) and a right clamping block (22), the left clamping block (21) and the right clamping block (22) are both rotatably connected to the receiving seat (4), and the left clamping block (21) and the right clamping block (22) are rotatably connected to the receiving seat (4). A left limit groove (211) and a right limit groove (221) are respectively provided on one side of the opposite end of the cylinder head. The left limit groove (211) and the right limit groove (221) are arranged opposite to each other and matched with the seat ring (8). The press-fitting mechanism (3) comprises a servo press (31) and a press rod (32) connected to the servo press (31). When the seat ring (8) is press-fitted onto the cylinder head, the servo press (31) drives the press rod (32) to pass through the left limit groove (211) and the right limit groove (221) and carry the seat ring (8) to be pressed into the cylinder head. The material receiving mechanism (2) is provided with a control component (5), and the control component (5) and the pressure rod (32) cooperate with the corresponding left material clamping block (21) and the right material clamping block (22) to control the opening and closing of the left material clamping block (21) and the right material clamping block (22) on the material receiving seat (4); When the pressure rod (32) is not extended and the left clamping block (21) and the right clamping block (22) are in a closed state with the cooperation of the control assembly (5), the distance between the left limiting groove (211) and the right limiting groove (221) in the closed state matches the outer diameter of the seat ring (8); When the pressure rod (32) is extended and with the cooperation of the control assembly (5), the left clamping block (21) and the right clamping block (22) are in an open state, and in the open state, the distance between the left limiting groove (211) and the right limiting groove (221) is greater than the diameter of the seat ring (8).

2. A valve seat ring press-fitting device for an engine cylinder head according to claim 1, characterized in that: The left material clamping block (21) and the right material clamping block (22) are rotatably connected to the material receiving seat (4) via a rotating shaft (23) arranged on the material receiving seat (4); the control component (5) comprises a spring (51) and a limit pin (52); one end of the spring (51) abuts against the material receiving seat (4); the other end abuts against an end of the corresponding left material clamping block (21) or right material clamping block (22) away from the material discharge port (11), thereby forcing the end of the left material clamping block (21) or right material clamping block (22) close to the material discharge port (11) to be in a closed state; the limit pin (52) is arranged on the corresponding left material clamping block (21) or right material clamping block (22); when the left material clamping block (21) and the right material clamping block are in a closed state, one end of the limit pin (52) abuts against the material receiving seat (4), thereby ensuring a minimum spacing between the left limit groove (211) and the right limit groove (221) in the closed state.

3. A valve seat ring press-fitting device for an engine cylinder head according to claim 1, characterized in that: The pressure rod (32) comprises a rod portion (321) and a head portion (322); the diameter of the rod portion (321) is greater than the diameter of the head portion (322); the head portion (322) matches with the seat ring (8); when the head portion (322) of the pressure rod (32) is inserted into the seat ring (8), the seat ring (8) is placed on the head portion (322) of the pressure rod (32).

4. A valve seat ring press-fitting device for an engine cylinder head according to claim 3, characterized in that: A left roller (212) and a right roller (222) are respectively mounted on the left clamping block (21) and the right clamping block (22); the minimum distance between the left roller (212) and the right roller (222) is greater than the outer diameter of the head (322) of the pressure rod (32) and smaller than the outer diameter of the rod (321) of the pressure rod (32); when the head (322) is inserted into the seat ring (8), the rod (321) contacts the left roller (212) and the right roller (222), forcing the left roller (212) and the right roller (222) to move away from each other with the left clamping block (21) and the right clamping block (22) and to be in an open state, thereby avoiding obstruction to the movement of the pressure rod (32).

5. A valve seat ring press-fitting device for an engine cylinder head according to claim 4, characterized in that: A transition portion (323) is provided between the head portion (322) and the rod portion (321), and the outer diameter of the transition portion (323) is larger than the outer diameter of the head portion (322) and smaller than the outer diameter of the rod portion (321).

6. A valve seat ring press-fitting device for an engine cylinder head according to claim 5, characterized in that: The head (322) is provided with an avoidance notch (3221), and the avoidance notch (3221) is provided on the side of the head (322) close to the left roller (212) and the right roller (222), and the side of the transition portion (323) close to the left roller (212) and the right roller (222) is provided with a transition surface (3231) with the left roller (212) and the right roller (222).

7. A valve seat ring press-fitting device for an engine cylinder head according to any one of claims 3 to 6, characterized in that: A magnet is embedded in the head (322) of the pressure rod (32), and the magnet is used to adsorb the seat ring (8) onto the head (322) of the pressure rod (32).

8. The valve seat ring press-fitting device for an engine cylinder head according to claim 1, characterized in that: It also includes a material-removing assembly (6) arranged in the moving direction of the pressure rod (32), the material-removing assembly (6) including a material-removing cylinder (61) and a material-removing claw (62) arranged on the material-removing cylinder (61), the material-removing cylinder (61) is arranged on one side of the material receiving seat (4), and the material-removing claw (62) is used to clamp and remove the seat ring (8) on the pressure rod (32) that fails to be pressed.

9. A valve seat ring press-fitting device for an engine cylinder head according to claim 1, characterized in that: A bushing (7) is arranged in the material receiving seat (4), and the pressing rod (32) is slidably matched with the bushing (7).

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