A clamping tool for the outer circle of a high-speed boring of a cylinder liner

Abstract

The utility model discloses a kind of outer circle clamping tool for cylinder liner high-speed boring, comprising: annular support, its outer side is welded and fixed with arc tube;Oil reservoir, it is fixed in the left side of annular support, its left side is set as opening, its top right side and bottom right side are respectively communicated and fixed with the both ends of arc tube, the oil reservoir and arc tube are filled with hydraulic oil in both;PLC controller, fixedly connected in the top of oil reservoir.The utility model is provided with a series of structures, which facilitates driving multiple clamping rods to clamp and fix the cylinder liner from multiple directions to the middle, utilizes the pressure control clamping and fixing mode, conveniently controls the clamping force within the safety range, avoids the phenomenon that clamping is damaged or unstable due to excessive pressure or too small, improves clamping stability and safety, and utilizes the mode of outer clamping, which can effectively avoid the interference shielding phenomenon at the end when boring cutter enters the hole operation, improves the processing convenience and applicability under certain conditions.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, specifically to a clamping fixture for the outer diameter of a cylinder liner high-speed boring machine. Background Technology

[0002] Currently, the double-end clamping or single-end clamping machining fixtures widely used in the field of high-speed boring machines have significant advantages such as convenient clamping and high machining efficiency when machining the inner side of cylinder liners. However, they still have some drawbacks when machining the inner side of cylinder liners: 1. The end clamping and fixing method is prone to interference and obstruction when the boring tool enters the inner hole, which affects the convenience and applicability of machining under certain conditions; 2. Traditional clamping methods are difficult to control the clamping force within a safe range. Excessive clamping force can cause deformation, while insufficient clamping force can lead to instability, resulting in poor stability and safety. In view of this, this application proposes an outer diameter clamping fixture for high-speed boring of cylinder liners to solve the above-mentioned problems. Utility Model Content

[0003] The purpose of this invention is to provide an outer diameter clamping fixture for high-speed boring of cylinder liners, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a clamping fixture for the outer diameter of a cylinder liner during high-speed boring, comprising:

[0005] The ring-shaped support has an arc-shaped tube welded and fixed to its outer side;

[0006] An oil reservoir is embedded and fixed on the left side of an annular support. Its left side is set as an opening, and its top right side and bottom right side are respectively connected and fixed to the two ends of the arc-shaped tube. Both the oil reservoir and the arc-shaped tube are filled with hydraulic oil.

[0007] The PLC controller is fixedly connected to the top of the oil reservoir;

[0008] The pressure-measuring horizontal drive hydraulic assembly is installed inside the oil reservoir and electrically connected to the PLC controller; the pressure-measuring horizontal drive hydraulic assembly is used to control the pressure and push of hydraulic oil under the control of the PLC controller.

[0009] The clamping assembly consists of multiple sets that are embedded and fixed in a ring at equal intervals inside the ring support. An oil passage pipe is fixed between the rear side of the assembly and the front side of the arc-shaped tube. Multiple clamping assemblies are used to synchronously control and clamp the outer side of the cylinder liner from multiple directions towards the center when the hydraulic oil is pushed under controlled pressure.

[0010] The support components consist of two sets, which are fixedly connected to the bottom of both sides of the annular support; the support components are used to provide fixed support for the annular support.

[0011] Preferably, the pressure-measuring transverse drive hydraulic assembly includes a first piston plate, a pressure sensor, a U-shaped seat, and an electric telescopic rod. The first piston plate is sealed and slidably fitted inside the oil reservoir. The pressure sensor is fixedly installed on the left side of the first piston plate by four screws. The U-shaped seat is fixedly connected to the left side of the oil reservoir. The electric telescopic rod is fixedly installed on the left side of the U-shaped seat. The extended end of the electric telescopic rod is fixedly connected to the left side of the pressure sensor. Both the pressure sensor and the electric telescopic rod are electrically connected to the PLC controller.

[0012] Preferably, the clamping assembly includes an outer tube, a second piston plate, a square guide rod, a spring, a clamping rod, and an anti-slip strip. Multiple outer tubes are annularly and equally spaced and fixed inside the annular support. The ends of the multiple outer tubes that are close together are all configured with a sealing structure. A vent hole is opened on one side of each outer tube, located inside the annular support. The ends of the multiple outer tubes that are opposing each other are fixed with a cap by four screws. A sealing gasket is adhered to one side of each cap, making tight contact with the corresponding end of the outer tube. The second piston plate is slidably and sealingly fitted inside the corresponding outer tube. Square guide rods are fixedly connected to one side of multiple second piston plates. The ends of multiple square guide rods extend to the inner side of the annular support and are fixedly connected to the corresponding clamp rods. Multiple anti-slip strips are respectively glued and fixed to one side of multiple clamp rods. The outer tube is slidably sleeved on the corresponding square guide rod. The spring is movably sleeved on the outer side of the corresponding square guide rod. The two ends of the spring are fixedly connected to the corresponding second piston plate and the inner wall of the outer tube, respectively. The front end of the oil pipe is connected and fixed to the rear side of the corresponding outer tube. Multiple second piston plates are located between multiple oil pipes.

[0013] Preferably, the support assembly includes two L-shaped supports and a fixed seat. The bottom sides of the annular support are fixedly connected to the corresponding two L-shaped supports, and the fixed seat is fixedly connected to the bottom of the corresponding two L-shaped supports. The top of the fixed seat has four mounting holes in a rectangular shape, and the arc-shaped tube is located between the two L-shaped supports that are opposite to each other.

[0014] Preferably, two first sealing rings are bonded to the outer side of the first piston plate, and the outer side of the first sealing rings is pressed and slidably in contact with the inner wall of the oil reservoir.

[0015] Preferably, a square guide hole is provided at one end of each of the multiple outer tubes, and the inner wall of the square guide hole slides and fits with the outer side of the corresponding square guide rod.

[0016] Preferably, the number of clamping rods is six to nine, and the six to nine clamping rods are arranged in a ring with equal spacing.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. Through the cooperation of the set support components, ring support, oil reservoir, PLC controller, pressure measuring horizontal drive oil pressure component, arc pipe, oil passage pipe and clamping component, multiple clamping rods can be driven to synchronously control the pressure and clamp the outer side of the cylinder liner from multiple directions towards the center. By using the pressure control clamping method, it is convenient to control the clamping force within a safe range, avoid the phenomenon of clamping damage or instability caused by excessive or insufficient pressure, and improve the clamping stability and safety.

[0019] 2. In addition, by using external clamping, the phenomenon that conventional end clamping can easily cause obstruction at the end is avoided. This prevents interference at the end when the boring tool enters the inner hole, thus improving the convenience and applicability of machining under certain conditions.

[0020] This utility model features a series of structures that facilitate the simultaneous controlled pressure clamping of multiple clamping rods from multiple directions towards the outer side of the cylinder liner. This controlled pressure clamping method allows for easy control of the clamping force within a safe range, preventing damage or instability caused by excessive or insufficient pressure, thus improving clamping stability and safety. Furthermore, the outer clamping method effectively avoids interference or obstruction at the end when the boring tool enters the inner hole, enhancing the convenience and applicability of machining under certain conditions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an outer diameter clamping fixture for high-speed boring of cylinder liners proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the main cross-sectional structure of an outer diameter clamping fixture for high-speed boring of cylinder liners proposed in this utility model;

[0023] Figure 3 for Figure 2 A magnified structural diagram of part A in the diagram.

[0024] In the diagram: 1. Annular support; 101. L-shaped support; 2. Oil reservoir; 201. First piston plate; 202. U-shaped seat; 203. Electric telescopic rod; 204. Pressure sensor; 3. PLC controller; 4. Arc-shaped pipe; 401. Oil pipe; 5. Outer pipe; 501. Second piston plate; 502. Square guide rod; 503. Clamping rod; 504. Anti-slip rubber strip; 505. Spring; 506. Vent hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1 to 3 As shown in this embodiment, a clamping fixture for the outer diameter of a cylinder liner high-speed boring machine includes:

[0027] The annular support 1 has an arc-shaped tube 4 welded and fixed to its outer side;

[0028] The oil reservoir 2 is embedded and fixed on the left side of the annular support 1. Its left side is set as an opening, and its top right side and bottom right side are respectively connected and fixed to the two ends of the arc-shaped tube 4. Both the oil reservoir 2 and the arc-shaped tube 4 are filled with hydraulic oil. The left side of the annular support 1 is provided with an embedding groove that is welded and fixed to the outside of the oil reservoir 2.

[0029] PLC controller 3 is fixedly connected to the top of oil reservoir 2;

[0030] The pressure-measuring horizontal drive hydraulic assembly is installed inside the oil reservoir 2 and electrically connected to the PLC controller 3; the pressure-measuring horizontal drive hydraulic assembly is used to control the pressure and push of hydraulic oil under the control of the PLC controller 3.

[0031] The clamping assembly consists of multiple sets that are embedded and fixed in a ring at equal intervals inside the ring support 1. An oil pipe 401 is fixed between the rear side of the clamping assembly and the front side of the arc-shaped tube 4. The multiple clamping assemblies are used to synchronously control the pressure and clamp the outer side of the cylinder liner from multiple directions towards the center when the hydraulic oil is pushed under controlled pressure.

[0032] The support components consist of two sets, which are fixedly connected to the bottom of both sides of the annular support 1 respectively; the support components are used to fix and support the annular support 1.

[0033] Furthermore, such as Figure 1 and 2 As shown, the pressure-measuring horizontal drive hydraulic assembly includes a first piston plate 201, a pressure sensor 204, a U-shaped seat 202, and an electric telescopic rod 203. The first piston plate 201 is sealed and slidably sleeved inside the oil reservoir 2. The pressure sensor 204 is fixedly installed on the left side of the first piston plate 201 by four screws. The U-shaped seat 202 is fixedly connected to the left side of the oil reservoir 2. The electric telescopic rod 203 is fixedly installed on the left side of the U-shaped seat 202. The extended end of the electric telescopic rod 203 is fixedly connected to the left side of the pressure sensor 204. Both the pressure sensor 204 and the electric telescopic rod 203 are electrically connected to the PLC controller 3.

[0034] In this embodiment, two first sealing rings are bonded to the outer side of the first piston plate 201. The outer side of the first sealing ring is squeezed and slidably in contact with the inner wall of the oil reservoir 2, so as to achieve a double-layer sliding seal between the outer side of the first piston plate 201 and the inner side of the oil reservoir 2.

[0035] In this implementation scheme, the first piston plate 201, pressure sensor 204, U-shaped seat 202, and electric telescopic rod 203 work together. The PLC controller 3 is pre-set to control the closing pressure value of the electric telescopic rod 203. When the operator starts the electric telescopic rod 203 in the forward direction, it drives the pressure sensor 204 to move to the right. The pressure sensor 204 drives the first piston plate 201 to the right to squeeze the hydraulic oil in the oil reservoir 2, forcing it into the arc-shaped tube 4. When the hydraulic oil is damped and subjected to damping force, the first piston plate 201 is also damped and resisted under the mutual transmission of forces. At this time, the pressure sensor 204 detects the squeezing force applied by the electric telescopic rod 203, converts it into a standard electrical signal, and transmits it to the PLC controller 3. The PLC controller 3 converts the received standard electrical signal into an actual pressure value through analog-to-digital conversion. When the preset pressure value is reached, the PLC controller 3 controls the electric telescopic rod 203 to automatically close, achieving the effect of controlling the pressure and pushing of the hydraulic oil.

[0036] Furthermore, such as Figure 1 , 2 As shown in Figure 3, the clamping assembly includes an outer tube 5, a second piston plate 501, a square guide rod 502, a spring 505, a clamping rod 503, and an anti-slip strip 504. Multiple outer tubes 5 are annularly and equally spaced and fixed inside the annular support 1. The ends of the multiple outer tubes 5 that are close together are all configured as sealing structures. A vent hole 506 is opened on one side of each outer tube 5, located inside the annular support 1. The ends of the multiple outer tubes 5 that are opposing each other are fixed with caps by four screws. A sealing gasket is adhered to one side of each cap, making tight contact with the corresponding end of the outer tube 5. The second piston plate 501 is slidably fitted inside the corresponding outer tube 5. Multiple square guide rods 502 are respectively fixed... The first piston plate 501 is fixedly connected to one side of the second piston plate 501. The first end of the second piston plate 502 extends to the inner side of the annular support 1 and is fixedly connected to the corresponding clamping rod 503. The second piston plate 502 is fixedly connected to one side of the clamping rod 503. The outer tube 5 is slidably sleeved on the corresponding square guide rod 502. The spring 505 is movably sleeved on the outer side of the corresponding square guide rod 502. The two ends of the spring 505 are fixedly connected to the inner wall of the corresponding second piston plate 501 and the outer tube 5, respectively. The front end of the oil pipe 401 is connected and fixed to the rear side of the corresponding outer tube 5. The second piston plate 501 is located between the multiple oil pipes 401.

[0037] In this embodiment, square guide holes are provided at the near ends of multiple outer tubes 5. The inner wall of the square guide hole slides and fits with the outer side of the corresponding square guide rod 502, so as to allow the square guide rod 502 to pass through and guide it. There are six to nine clamping rods 503, and the six to nine clamping rods 503 are arranged in a ring at equal intervals. The inner side of the ring support 1 is provided with multiple fitting holes that are welded and fixed to the outer side of the corresponding outer tube 5. Two second sealing rings are bonded and fitted on the outer side of the second piston plate 501. The outer side of the second sealing ring is squeezed and slidably fitted to the inner wall of the outer tube 5, so as to achieve a double-layer sliding seal between the outer side of the second piston plate 501 and the inner side of the outer tube 5.

[0038] In this embodiment, through the cooperation of the outer tube 5, the second piston plate 501, the square guide rod 502, the spring 505, the clamping rod 503, and the anti-slip rubber strip 504, when the hydraulic oil is pushed into the arc-shaped tube 4, the hydraulic oil is evenly distributed through multiple oil pipes 401 into multiple outer tubes 5, and squeezed and driven multiple second piston plates 501 to retract and move towards the center. The multiple second piston plates 501 drive multiple clamping rods 503 to retract and move towards the center through multiple square guide rods 502, compressing multiple springs 505. The multiple clamping rods 503 drive multiple anti-slip rubber strips 504 to clamp the cylinder liner to the center. By using the controlled pressure pushing method of the hydraulic oil, the multiple clamping rods 503 are driven to move towards the center of the cylinder from multiple directions. The outer-side synchronous pressure-controlled clamping method effectively controls the clamping force within a safe range, preventing damage or instability caused by excessive or insufficient pressure. This improves clamping stability and safety. Furthermore, the outer-side clamping method avoids the obstruction that can occur with conventional end clamping. Additionally, the final pressure-controlled clamping force can be pre-detected by measuring the damping force generated by the compression of multiple springs 505 during clamping. This damping force can be added to the preset control shut-off pressure, or the control pressure can be set slightly higher within the safe range. For example, two to three pressures are considered safe, and the pressure can be set arbitrarily within this range or biased towards three. This allows personnel to flexibly set the pressure according to actual needs using the programming function of the PLC controller 3.

[0039] Furthermore, such as Figure 1 and 2 As shown, the support assembly includes two L-shaped supports 101 and a fixed seat. The bottom sides of the annular support 1 are fixedly connected to the corresponding two L-shaped supports 101 respectively. The fixed seat is fixedly connected to the bottom of the corresponding two L-shaped supports 101. The top of the fixed seat is rectangular and has four mounting holes. The arc-shaped tube 4 is located between the two L-shaped supports 101 that are opposite each other.

[0040] In this embodiment, the fixed seat is installed and fixed on the high-speed boring machine by means of two L-shaped supports 101 and fixed seat, and the annular support 1 is fixedly supported by the two fixed seats through four L-shaped supports 101.

[0041] It should be noted that the PLC controller 3 preferably adopts the Siemens S7-200SMART programmable controller with integrated analog input module, which can receive the standard electrical signal output by the pressure sensor 204 and convert it into the actual pressure value through the integrated analog-to-digital conversion function; the pressure sensor 204 is preferably a plate (pressure) weighing sensor of the Transcell BSS series.

[0042] Furthermore, the electrical connection between the electric telescopic rod 203 and the PLC controller 3 is achieved through wires and a servo driver. The preferred servo driver is a Siemens V90 servo driver, a common driver for motors and electric actuators used with Siemens programmable controllers, meeting the direct control requirements of the programmable controller over the electric telescopic rod 203. The pressure sensor 204 is electrically connected to the PLC controller 3 via a flexible wire. Given that the pressure sensor 204 is a moving component, the connecting flexible wire has a pre-reserved bending length to meet its displacement requirements. This method of establishing a direct electrical connection to the PLC controller 3 via wires is a mature and well-known technology for conventional wired control of the controller, and will not be elaborated further here.

[0043] Regarding power supply, given that the high-speed boring machine for cylinder liners is a machining site with sufficient power supply measures and conditions, all electrical components of this device are connected to the mains power supply on site. They are connected to the power input interfaces of each device through conventional power distribution devices such as circuit breakers, contactors, and power modules (not marked in the figure) to form a complete power supply circuit. This power supply scheme is a conventional power distribution method for industrial equipment and is a mature and well-known technical means, so it will not be described in detail here.

[0044] It should be further explained that the first piston plate 201, U-shaped seat 202, oil reservoir 2, annular support 1, arc-shaped tube 4, oil passage pipe 401, outer tube 5, second piston plate 501, square guide rod 502 and clamping rod 503 are all preferably made of stainless steel. The advantages of stainless steel are high hardness, high wear resistance and good maintenance-free effect, which ensures the explosion-proof effect of the hydraulic oil under high pressure and compression.

[0045] The method of use in this embodiment is as follows: When using the outer diameter clamping fixture for high-speed boring of cylinder liners, the cylinder liner is inserted into the annular support 1 and positioned between multiple clamping rods 503. The pressure value for closing the electric telescopic rod 203 is preset using the PLC controller 3. When the operator starts the electric telescopic rod 203 in the forward direction, it drives the pressure sensor 204 to move to the right. The pressure sensor 204 drives the first piston plate 201 to the right to squeeze the hydraulic oil in the oil reservoir 2, forcing it into the arc-shaped tube 4. When the hydraulic oil is pushed into the arc-shaped tube 4, it utilizes the characteristic of liquid self-uniform flow distribution to evenly distribute the hydraulic oil through multiple oil passages 401. The hydraulic fluid flows into multiple outer tubes 5, compressing and driving multiple second piston plates 501 to retract and move towards the center. These second piston plates 501, via multiple square guide rods 502, drive multiple clamping rods 503 to retract and move towards the center, compressing multiple springs 505. The clamping rods 503 then drive multiple anti-slip rubber strips 504 to clamp the outer side of the cylinder liner towards the center. In this clamped state, the clamping rods 503 are blocked and restricted by the cylinder liner, which in turn blocks and restricts the multiple second piston plates 501. The multiple second piston plates 501 dampen and block the hydraulic fluid. When the hydraulic fluid is damped and subjected to damping force, the first piston plate 201 is also damped and resisted through the mutual transmission of forces. At this time, the pressure sensor 204 detects the compressive force applied by the electric telescopic rod 203, converts it into a standard electrical signal, and transmits it to the PLC controller 3. The PLC controller 3 converts the received standard electrical signal into an actual pressure value through analog-to-digital conversion. When the preset pressure value is reached, the PLC controller 3 controls the electric telescopic rod 203 to automatically close, achieving the effect of driving multiple clamping rods 503 to synchronously control the pressure and clamp the outer side of the cylinder liner from multiple directions towards the center. By using the pressure-controlled clamping method, it is convenient to control the clamping force within a safe range, avoiding the phenomenon of clamping damage or instability caused by excessive or insufficient pressure, thus improving clamping stability and safety. Furthermore, by using the outer clamping method... To avoid the phenomenon that conventional end clamping can easily cause obstruction at the end, and thus avoid interference at the end when the boring tool enters the inner hole, the processing convenience and applicability under certain conditions are improved. In addition, for the final control clamping force, the damping force formed by the compression of multiple springs 505 used during clamping can be detected in advance. The preset control closing pressure is added to this damping force, or the control pressure is set to be larger within the safe range. For example, the safe range is between two and three pressures. It can be set arbitrarily within this range or biased towards three. Personnel can use the programming function of PLC controller 3 to flexibly set it according to the actual situation.

[0046] When the clamping is released, the electric telescopic rod 203 is activated in the reverse direction, causing it to drive the first piston plate 201 to move back to the left via the pressure sensor 204. This draws back the hydraulic oil, releasing the pressure on the multiple second piston plates 501. At this time, the elastic force of the multiple springs 505, which are in a compressed state, drives the multiple second piston plates 501 to expand and move back outward. The multiple second piston plates 501 drive the multiple clamping rods 503 to expand and move back outward via the multiple square guide rods 502, releasing the clamping state on the cylinder liner. The cylinder liner can then be removed for replacement.

[0047] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamping fixture for the outer diameter of a cylinder liner high-speed boring machine, comprising an annular support (1), characterized in that: include: An annular support (1) has an arc-shaped tube (4) welded and fixed to its outer side; The oil reservoir (2) is embedded and fixed on the left side of the annular support (1). Its left side is set as an opening, and its top right side and bottom right side are respectively connected and fixed to the two ends of the arc tube (4). The oil reservoir (2) and the arc tube (4) are both filled with hydraulic oil. The PLC controller (3) is fixedly connected to the top of the oil reservoir (2); The pressure-measuring horizontal drive oil pressure assembly is installed in the oil reservoir (2) and electrically connected to the PLC controller (3); The clamping assembly consists of multiple sets that are embedded and fixed in a ring at equal intervals inside the ring support (1), and an oil pipe (401) is fixed between its rear side and the front side of the arc-shaped pipe (4). The support components consist of two sets, which are fixedly connected to the bottom of both sides of the annular support (1).

2. The clamping fixture for the outer diameter of a cylinder liner high-speed boring machine according to claim 1, characterized in that: The pressure-measuring horizontal drive hydraulic assembly includes a first piston plate (201), a pressure sensor (204), a U-shaped seat (202), and an electric telescopic rod (203). The first piston plate (201) is sealed and slidably sleeved inside the oil reservoir (2). The pressure sensor (204) is fixedly installed on the left side of the first piston plate (201) by four screws. The U-shaped seat (202) is fixedly connected to the left side of the oil reservoir (2). The electric telescopic rod (203) is fixedly installed on the left side of the U-shaped seat (202). The extended end of the electric telescopic rod (203) is fixedly connected to the left side of the pressure sensor (204). Both the pressure sensor (204) and the electric telescopic rod (203) are electrically connected to the PLC controller (3).

3. The clamping fixture for the outer diameter of a cylinder liner high-speed boring machine according to claim 1, characterized in that: The clamping assembly includes an outer tube (5), a second piston plate (501), a square guide rod (502), a spring (505), a clamping rod (503), and an anti-slip strip (504). Multiple outer tubes (5) are annularly and equally spaced and fixed inside the annular support (1). The ends of the multiple outer tubes (5) that are close together are all configured with a sealing structure. One side of each outer tube (5) has a vent hole (506) located inside the annular support (1). The ends of the multiple outer tubes (5) that are opposing each other are fixed with caps by four screws. One side of each cap is bonded with a sealing gasket that is tightly pressed against the end of the corresponding outer tube (5). The second piston plate (501) is slidably fitted inside the corresponding outer tube (5). Multiple square guide rods (502) are respectively fixed... Connected to one side of multiple second piston plates (501), one end of multiple square guide rods (502) extends to the inside of the annular support (1) and is fixedly connected to the corresponding clamp rod (503). Multiple anti-slip strips (504) are respectively bonded and fixed to one side of multiple clamp rods (503). The outer tube (5) is slidably sleeved on the corresponding square guide rod (502). The spring (505) is movably sleeved on the outside of the corresponding square guide rod (502). The two ends of the spring (505) are fixedly connected to the inner wall of the corresponding second piston plate (501) and the outer tube (5) respectively. The front end of the oil pipe (401) is connected and fixed to the rear side of the corresponding outer tube (5). Multiple second piston plates (501) are located between multiple oil pipes (401).

4. The clamping fixture for the outer diameter of a cylinder liner high-speed boring machine according to claim 1, characterized in that: The support assembly includes two L-shaped supports (101) and a fixed seat. The bottom sides of the annular support (1) are fixedly connected to the corresponding two L-shaped supports (101) respectively. The fixed seat is fixedly connected to the bottom of the corresponding two L-shaped supports (101). The top of the fixed seat is rectangular and has four mounting holes. The arc-shaped tube (4) is located between the two L-shaped supports (101) that are opposite each other.

5. A clamping fixture for the outer diameter of a cylinder liner high-speed boring machine according to claim 2, characterized in that: The outer side of the first piston plate (201) is fitted with two first sealing rings, and the outer side of the first sealing rings is pressed and slidably in contact with the inner wall of the oil reservoir (2).

6. The clamping fixture for the outer diameter of a cylinder liner high-speed boring machine according to claim 3, characterized in that: A square guide hole is provided at one end of each of the multiple outer tubes (5), and the inner wall of the square guide hole slides and fits with the outer side of the corresponding square guide rod (502).

7. A clamping fixture for the outer diameter of a cylinder liner high-speed boring machine according to claim 3, characterized in that: The number of clamps (503) is six to nine, and the six to nine clamps (503) are arranged in a ring with equal spacing.

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