A hydraulic cylinder machining drilling device and method

Abstract

The application discloses a drilling device and method for hydraulic oil cylinder processing and relates to the technical field of hydraulic oil cylinders.The drilling device for hydraulic oil cylinder processing comprises a machine tool for boring a blind hole in the inner wall of a cylinder body, and the machine tool is provided with a first thickness gauge, a second thickness gauge and a third thickness gauge; a first rotating mechanism is arranged on the machine tool and is used for rotating the cylinder body at a point where the spherical head surface of the cylinder body intersects with the Z axis, and the rotating shaft is parallel to the Y axis; a second rotating mechanism is arranged on the machine tool and is used for rotating the cylinder body at the point where the spherical head surface of the cylinder body intersects with the Z axis, and the rotating shaft is parallel to the X axis; a first displacement mechanism is arranged on the machine tool and is used for linearly moving the cylinder body along the X axis; a second displacement mechanism is arranged on the machine tool and is used for linearly moving the cylinder body along the Y axis; and a clamping mechanism is arranged on the machine tool and is used for fixing the cylinder body when the machine tool is boring the blind hole in the inner wall of the cylinder body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic oil cylinder, more particularly, it relates to a drilling device and method for hydraulic oil cylinder processing. BACKGROUND

[0002] The hydraulic support is the main equipment for the comprehensive mechanized mining of coal mines, and the hydraulic oil cylinder is a power component. The working environment in the coal mine is harsh, and the humidity is large, which causes the inner wall of the hydraulic oil cylinder to be corroded and worn. The hydraulic oil cylinder needs to be overhauled every certain period of time to ensure the overall performance of the hydraulic support. In the maintenance of the hydraulic oil cylinder, the inner wall of the cylinder body is basically repaired by honing. However, when the rust pit depth of the inner wall of the cylinder body is greater than 1mm and the rust pit distribution area is large, the coaxiality of the honed inner wall of the cylinder body and the inner diameter of the cylinder port is poor, which is often greater than 0.1mm, resulting in that the hydraulic oil cylinder cannot be assembled or used.

[0003] As an improved method, the method comprises the following steps: clamping the cylinder bottom by a four-jaw chuck, fine-tuning the four-jaw chuck, measuring the wall thickness of the cylinder body by an ultrasonic thickness gauge, keeping the wall thickness deviation within 0.1mm, and making the outer cylindrical surface of the cylinder body coaxial with the rotating axis of the four-jaw chuck; and turning the frame socket at the bottom end of the cylinder body and the frame socket of the cylinder port.

[0004] The center frame is erected at the cylinder port frame socket, the magnetic dial indicator is used to measure the frame socket at the bottom end of the cylinder body, the four-jaw chuck is fine-tuned, and the runout is less than 0.1mm.

[0005] The magnetic dial indicator is adsorbed on the deep hole drilling bed rod, the cylinder port inner hole is measured by the magnetic dial indicator, the height of the center frame and the four-jaw chuck is fine-tuned, and the runout is less than 0.1mm.

[0006] The cylinder body inner wall blind hole is bored to remove the corrosion, rust pit and wear of the cylinder diameter inner wall, and the normal operation of the deep hole drilling and boring machine can be performed.

[0007] However, the hydraulic support is a structure for controlling the mine pressure of the coal mining face. The mine pressure of the coal mining face acts on the hydraulic support in the form of external load. The pile type hydraulic support relies on the top beam to support the roof rock, and the cylinder body outer wall may be impacted and deformed due to factors such as rock falling. At this time, the error of coaxial alignment by wall thickness measurement is large, the coaxiality of the cylinder body inner wall blind hole after treatment cannot be guaranteed to be less than 0.1mm, and the repaired hydraulic oil cylinder cannot be well assembled and used. SUMMARY

[0008] The present application provides a drilling device for hydraulic oil cylinder processing, which solves the technical problem that the cylinder body outer wall is impacted and deformed due to factors such as rock falling, the error of coaxial alignment by wall thickness measurement is large at this time, the coaxiality of the cylinder body inner wall blind hole after treatment cannot be guaranteed to be less than 0.1mm, and the repaired hydraulic oil cylinder cannot be well assembled and used.

[0009] The application provides a drilling device for hydraulic cylinder processing, which comprises a machine tool for boring a blind hole in an inner wall of a cylinder body, and is characterized by comprising:

[0010] a first thickness gauge capable of moving along a first path in a first plane;

[0011] a second thickness gauge capable of moving along a second path in a second plane;

[0012] a third thickness gauge arranged at an origin of a three-axis coordinate system;

[0013] a Z-axis of the three-axis coordinate system is a processing axis of the machine tool when the machine tool bores the blind hole in the inner wall of the cylinder body, and an X-axis and a Y-axis are parallel to the first plane and the second plane respectively;

[0014] a first rotating mechanism for rotating the cylinder body at a point where a spherical head surface of the cylinder body intersects with the Z-axis, and a rotating axis of the first rotating mechanism is parallel to the Y-axis;

[0015] a second rotating mechanism for rotating the cylinder body at the point where the spherical head surface of the cylinder body intersects with the Z-axis, and a rotating axis of the second rotating mechanism is parallel to the X-axis;

[0016] a first displacement mechanism for linearly moving the cylinder body along the X-axis;

[0017] a second displacement mechanism for linearly moving the cylinder body along the Y-axis;

[0018] a clamping mechanism for fixing the cylinder body when the machine tool bores the blind hole in the inner wall of the cylinder body.

[0019] Further, the first rotating mechanism comprises a first track and a first driving mechanism for moving the cylinder body along the first track, the first track is located on a spherical surface with a point where the spherical head surface of the cylinder body intersects with the Z-axis as a spherical center, and the first track takes the Y-axis as an axis.

[0020] Further, the first driving mechanism comprises a first sliding seat in sliding connection with the first track, the first sliding seat is connected with the cylinder body, the first sliding seat is hinged with a piston rod of a first hydraulic cylinder, and a cylinder base of the first hydraulic cylinder is hinged with the first track.

[0021] Further, the second rotating mechanism comprises a second track and a second driving mechanism for moving the cylinder body along the second track, the second track is arranged on the first sliding seat, the second track is located on a spherical surface with the point where the spherical head surface of the cylinder body intersects with the Z-axis as a spherical center, and the second track takes the X-axis as an axis.

[0022] Further, the second driving mechanism comprises a second sliding seat in sliding connection with the second track, the second sliding seat is connected with the cylinder body, the second sliding seat is hinged with a piston rod of a second hydraulic cylinder, and a cylinder base of the second hydraulic cylinder is hinged with the second track.

[0023] Further, a positioner and a third displacement mechanism are further included, the third displacement mechanism is used for linearly moving the cylinder body along the Z axis, and the positioner is used for marking a reference point in space and moving the cylinder body along the X axis, the Y axis and the Z axis until the reference point is located on the surface of the ball head of the cylinder body.

[0024] Further, the second displacement mechanism includes a third sliding seat connected with the second sliding seat in sliding mode, and the third sliding seat is connected with a linear driving mechanism used for driving the third sliding seat to linearly move along the Y axis.

[0025] Further, the first displacement mechanism includes a fourth sliding seat connected with the third sliding seat in sliding mode, and the fourth sliding seat is connected with a linear driving mechanism used for driving the fourth sliding seat to linearly move along the X axis.

[0026] Further, the clamping mechanism includes clamping pieces arranged on both sides of the machine tool, the clamping pieces are rotatably connected with clamping sliding blocks through rotating shafts arranged along the X axis, the clamping sliding blocks can move along the X axis and the Y axis, the clamping pieces are moved and rotated after the cylinder body is positioned to adapt to the positioned cylinder body, and then the cylinder body is clamped and fixed.

[0027] The application provides a blind hole repairing method for oil cylinder processing, which comprises the following steps:

[0028] Definition: the processing axis of the machine tool when boring the blind hole in the inner wall of the cylinder body is the Z axis, the X axis, the Y axis and the Z axis intersect at the origin, and the X axis, the Y axis and the Z axis are perpendicular to each other; the first plane and the second plane are parallel to the plane formed by the X axis and the Y axis;

[0029] The thickness gauge is moved along the first path in the first plane, the first path is in the first plane and parallel to the X axis, and the midpoint is located on the Z axis, and the probe of the thickness gauge faces the direction of the Z axis;

[0030] The thickness values measured by moving the thickness gauge along the first path are sorted according to the measurement time to obtain a first thickness sequence, if there is only one thickness value equal to the radius of the ball head in the first thickness sequence, the cylinder body is not moved;

[0031] If there are two thickness values equal to the radius of the ball head in the first thickness sequence, the thickness values between the two thickness values are deleted from the first thickness sequence to generate two first subsequences;

[0032] The cylinder body is rotated at the point where the surface of the ball head of the cylinder body intersects with the Z axis, the rotation axis is parallel to the Y axis, and the endpoint of the rotation is that the total difference of the thickness values of the two first subsequences is less than a set first difference value;

[0033] The thickness gauge is moved along the second path in the second plane, the second path is a straight line along the Y axis, and the midpoint is located on the Z axis, and the probe of the thickness gauge faces the direction of the Z axis;

[0034] The thickness values measured by the thickness gauge moving along the second path are sorted according to the time of measurement to obtain a second thickness sequence, if there is only one thickness value equal to the radius of the ball head in the second thickness sequence, the cylinder body is not moved;

[0035] If there are two thickness values equal to the radius of the ball head in the second thickness sequence, the thickness values between the two thickness values are deleted from the second thickness sequence to generate two second subsequences;

[0036] The cylinder body is rotated with the point where the ball head surface of the cylinder body intersects with the Z axis as the rotation center, and the rotation axis is parallel to the X axis, and the end point of the rotation is that the total difference of the thickness values of the two second subsequences is less than a set first difference value;

[0037] The cylinder body is linearly moved along the X axis and the Y axis directions until the thickness value measured at the origin is equal to the radius of the ball head;

[0038] Then the cutter is moved along the Z axis to bore the blind hole of the inner wall of the cylinder body.

[0039] The beneficial effects of the present application are that the cylinder body is adjusted by the first rotating mechanism, the second rotating mechanism, the first displacement mechanism and the second displacement mechanism, so that the axis of the cylinder body approaches the coaxial state with the machining axis, and the coaxiality of the blind hole of the inner wall of the cylinder body after the boring process meets the requirements, and the repaired hydraulic oil cylinder can be assembled and used well. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is the front view of the drilling device for the hydraulic oil cylinder of the present application;

[0041] Figure 2 is the front view of the first thickness gauge, the second thickness gauge, the third thickness gauge, the first rotating mechanism, the second rotating mechanism, the positioner and the clamping mechanism of the present application;

[0042] Figure 3 is the Figure 2 structure front view of the first rotating mechanism in the present application;

[0043] Figure 4 is the dynamic schematic diagram of the adjustment along the Y axis of the present application.

[0044] In the figure: 1, machine tool; 2, cylinder body; 3, first thickness gauge; 4, second thickness gauge; 5, third thickness gauge; 6, first rotating mechanism; 61, first rail; 62, first sliding seat; 63, first hydraulic cylinder; 7, second rotating mechanism; 71, second rail; 72, second sliding seat; 73, second hydraulic cylinder; 8, first displacement mechanism; 81, fourth sliding seat; 9, second displacement mechanism; 91, third sliding seat; 10, positioner; 11, clamping mechanism. DETAILED DESCRIPTION

[0045] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that discussions of these implementations are merely provided to enable better understanding of the subject matter described herein, and can include various process or components according to one embodiment or another. Each of the processes and components can be used independently of the other processes and components and can be combined in various permutations and combinations. Additionally, the features described with respect to some examples can be combined in other examples.

[0046] The application provides a blind hole repairing method for oil cylinder processing, comprising the following steps:

[0047] Definition: the processing axis of the machine tool 1 when boring the blind hole in the inner wall of the cylinder body 2 is the Z axis (the tool rotates around the processing axis during boring processing), the X axis, the Y axis and the Z axis intersect at the origin, and the X axis, the Y axis and the Z axis are perpendicular to each other; the first plane and the second plane are parallel to the plane formed by the X axis and the Y axis;

[0048] The cylinder body 2 is fixed on the clamping mechanism 11 of the machine tool 1, the blind hole of the cylinder body 2 faces the boring mechanism on the left side of the machine tool 1, the processing axis of the boring mechanism is the Z axis, the Z axis extends horizontally left and right, and the ball head of the cylinder body 2 faces the thickness measuring mechanism on the right side of the machine tool 1;

[0049] Two laser positioners 10 are arranged in a plane perpendicular to the Z axis, the light emitted by the two laser positioners 10 is perpendicular to each other, and the intersection of the two light beams is located on the Z axis, the position of the ball head of the cylinder body 2 is adjusted so that the light source points of the two laser positioners 10 on the ball head of the cylinder body 2 coincide, and the coincidence point is the reference point;

[0050] The thickness gauge is moved along the first path in the first plane, the first path is in the first plane and parallel to the X axis, and the midpoint is located on the Z axis, and the probe of the thickness gauge faces the direction of the Z axis;

[0051] The thickness values measured by moving the thickness gauge along the first path are sorted according to the measurement time to obtain a first thickness sequence, if there is only one thickness value equal to the radius of the ball head in the first thickness sequence, the cylinder body 2 is not moved;

[0052] If there are two thickness values equal to the radius of the ball head in the first thickness sequence, the thickness values between the two thickness values are deleted from the first thickness sequence to generate two first subsequences;

[0053] The cylinder body 2 is rotated around the point where the surface of the ball head of the cylinder body 2 intersects with the Z axis, and the rotation axis is parallel to the Y axis, and the end point of the rotation is that the total difference of the thickness values of the two first subsequences is less than a set first difference value;

[0054] The thickness gauge is moved along a second path in a second plane, the second path is a straight line along the Y-axis direction and the midpoint is located on the Z-axis, and the probe of the thickness gauge is directed towards the Z-axis;

[0055] The thickness values measured by moving the thickness gauge along the second path are sorted according to the time of measurement to obtain a second thickness sequence, if there is only one thickness value equal to the radius of the spherical head in the second thickness sequence, the cylinder body 2 is not moved;

[0056] If there are two thickness values equal to the radius of the spherical head in the second thickness sequence, the thickness values between the two thickness values are deleted from the second thickness sequence to generate two second sub-sequences;

[0057] The cylinder body 2 is rotated at the point where the spherical head surface of the cylinder body 2 intersects the Z-axis, and the rotation axis is parallel to the X-axis, and the endpoint of the rotation is that the total difference of the thickness values of the two second sub-sequences is less than a set first difference value;

[0058] The cylinder body 2 is moved linearly along the X-axis and the Y-axis directions until the thickness value measured at the origin is equal to the radius of the spherical head;

[0059] Then the cutter is moved along the Z-axis to bore the blind hole on the inner wall of the cylinder body 2.

[0060] Before performing the foregoing steps, the spherical body of the cylinder body 2 can be polished to have a roundness tolerance less than 0.02 mm.

[0061] At least one embodiment of the present application provides a drilling device for processing a hydraulic oil cylinder, as shown in the accompanying drawings, comprising: Figures 1-4 As shown in the accompanying drawings, comprising:

[0062] A machine tool 1 is used to bore the blind hole on the inner wall of the cylinder body 2, and the machine tool 1 is provided with:

[0063] A first thickness gauge 3 capable of moving along a first path in a first plane;

[0064] A second thickness gauge 4 capable of moving along a second path in a second plane;

[0065] A third thickness gauge 5 capable of moving to the origin of a three-axis coordinate system;

[0066] The Z-axis of the three-axis coordinate system is the processing axis of the machine tool 1 when boring the blind hole on the inner wall of the cylinder body 2, and the X-axis and the Y-axis are parallel to the first plane and the second plane, respectively;

[0067] A first rotating mechanism 6 is used to rotate the cylinder body 2 at the point where the spherical head surface of the cylinder body 2 intersects the Z-axis, and the rotation axis is parallel to the Y-axis;

[0068] A second rotating mechanism 7 is used to rotate the cylinder body 2 at the point where the spherical head surface of the cylinder body 2 intersects the Z-axis, and the rotation axis is parallel to the X-axis;

[0069] a first displacement mechanism 8 for linearly moving the cylinder body 2 along the X axis;

[0070] a second displacement mechanism 9 for linearly moving the cylinder body 2 along the Y axis;

[0071] a clamping mechanism 11 for fixing the cylinder body 2 when the lathe 1 bores the blind hole in the inner wall of the cylinder body 2.

[0072] In an embodiment of the present application, the first rotating mechanism 6 comprises a first track 61 and a first driving mechanism for moving the cylinder body 2 along the first track 61, the first track 61 is located on a spherical surface with the point where the spherical head surface of the cylinder body 2 intersects the Z axis as the center, and the first track 61 has the Y axis as the axis.

[0073] In an embodiment of the present application, the first driving mechanism comprises a first sliding seat 62 in sliding connection with the first track 61, the first sliding seat 62 is connected to the cylinder body 2, the first sliding seat 62 is hinged to the piston rod of a first hydraulic cylinder 63, and the cylinder base of the first hydraulic cylinder 63 is hinged to the first track 61.

[0074] In an embodiment of the present application, the second rotating mechanism 7 comprises a second track 71 and a second driving mechanism for moving the cylinder body 2 along the second track 71, the second track 71 is arranged on the first sliding seat 62, the second track 71 is located on a spherical surface with the point where the spherical head surface of the cylinder body 2 intersects the Z axis as the center, and the second track 71 has the X axis as the axis.

[0075] In an embodiment of the present application, the second driving mechanism comprises a second sliding seat 72 in sliding connection with the second track 71, the second sliding seat 72 is connected to the cylinder body 2, the second sliding seat 72 is hinged to the piston rod of a second hydraulic cylinder 73, and the cylinder base of the second hydraulic cylinder 73 is hinged to the second track 71.

[0076] In an embodiment of the present application, the point where the spherical head surface of the cylinder body 2 intersects the Z axis has a constant coordinate at the origin of the three-axis coordinate system, and the point is defined as the reference point.

[0077] The drilling device for processing the hydraulic oil cylinder further comprises a positioner 10 and a third displacement mechanism for linearly moving the cylinder body 2 along the Z axis, and the positioner 10 is used for marking the reference point in space, moving the cylinder body 2 along the X axis, the Y axis and the Z axis until the reference point is located on the surface of the spherical head of the cylinder body 2.

[0078] It should be noted that the positioner 10 includes but is not limited to two laser positioners vertically arranged in the same plane, and the intersection of the light rays of the two laser positioners is the reference point, and the intersection is located on the Z axis, the third displacement mechanism comprises a support platform slidingly installed on the lathe, the support platform is connected to a linear driving mechanism for driving the support platform to linearly move along the Z axis, and the first track 61 of the first rotating mechanism 6 is fixedly installed on the support platform.

[0079] The second shifting mechanism 9 includes a third slide 91 slidably connected to the second slide 72, and the third slide 91 is connected to a linear drive mechanism for driving it to move linearly along the Y-axis.

[0080] In one embodiment of the present invention, the first shifting mechanism 8 includes a fourth slide 81 slidably connected to the third slide 91, and the fourth slide 81 is connected to a linear drive mechanism for driving it to move linearly along the X-axis.

[0081] In one embodiment of the present invention, the clamping mechanism 11 is disposed on the fourth slide 81.

[0082] In one embodiment of the present invention, the clamping mechanism 11 includes clamping members disposed on both sides of the machine tool 1. The clamping members are rotatably connected to the clamping slider via a rotating shaft arranged along the X-axis. The clamping slider can move along the X-axis and Y-axis. After the cylinder 2 is positioned, the clamping members are moved and rotated to adapt to the positioned cylinder 2, and then the cylinder 2 is clamped and fixed.

[0083] In one embodiment of the present invention, the specific implementation scenario for adjusting the cylinder 2 by means of the second rotating mechanism 7 is as follows:

[0084] If the second thickness gauge 4 is moved within the second plane, and there is only one thickness value in the second thickness sequence that is equal to the radius of the ball head, it means that the axis of the cylinder 2 is parallel to the Z-axis, and the second rotating mechanism 7 does not need to be started.

[0085] If there are two thickness values ​​in the second thickness sequence that are equal to the radius of the sphere head, such as... Figure 4 As shown, a, b, c, and d sequentially illustrate the adjustment process of cylinder 2. The dashed line in the middle of cylinder 2 represents the Z-axis, and the dashed line connecting the thickness gauge represents its thickness measurement path. (See reference...) Figure 1 In the second thickness measurement 4, during the movement, there are two thickness values ​​in the second thickness sequence that are equal to the radius of the sphere head. Figure 4 In step b), at this point, the axis of cylinder 2 is necessarily not parallel and does not coincide with the Z-axis. That is, cylinder 2 is tilted relative to the Z-axis. The second rotating mechanism 7 is used to adjust cylinder 2 to rotate around the reference point until the total difference in thickness values ​​of the two first subsequences is less than the set first difference. At this point, the axis of cylinder 2 will approach the state of being parallel to the Z-axis. Figure 4 c);

[0086] Next, the position of the cylinder 2 in the Y-axis direction is adjusted by the second shifting mechanism 9 until the thickness value measured at the origin is equal to the radius of the ball head. Then, the adjustment of the cylinder 2 is completed by the second rotating mechanism 7. Figure 4 d) in the middle;

[0087] As an example, the second thickness gauge 4 moves from top to bottom, and samples every fixed moving distance, and the recorded second thickness sequence is {0, 0.5, 1, …, 10, …, 15, …, 10, …, 0}. 10 is the radius of the ball head.

[0088] The two first sub-sequences are {0, 0.5, 1, …, 10} and {10, …, 0} respectively; the sum of the sequence units of the first sub-sequences is summed to obtain the sum value, and the total difference value of the thickness values of the two first sub-sequences is obtained by subtracting the sum values of the two first sub-sequences.

[0089] At this time, the posture of the cylinder body 2 is as shown in a of Figure 4 The length of the first sub-sequence {0, 0.5, 1, …, 10} is greater than {10, …, 0}, at this time, the cylinder body 2 is rotated counterclockwise, that is, if the length of the first sub-sequence containing the starting point of the second thickness sequence is greater than the first sub-sequence containing the end point of the second thickness sequence, the cylinder body 2 is rotated counterclockwise, otherwise the cylinder body 2 is rotated clockwise.

[0090] In an embodiment of the present application, the third thickness gauge is used to measure the thickness value of the ball head at the origin;

[0091] In an embodiment of the present application, the third thickness gauge can also be connected to the piston rod of the air cylinder, and when the operation of linearly moving the cylinder body along the X-axis and Y-axis directions is performed, the third thickness gauge is driven to move to the origin by the air cylinder, and before the cylinder body needs to be linearly moved along the X-axis and Y-axis directions, the air cylinder can drive the third thickness gauge to move away from the origin, so as to avoid possible position blockage, such as avoiding hindering the movement of the first thickness gauge and the second thickness gauge.

[0092] It should be noted that the process of adjusting the cylinder body 2 by the first rotating mechanism 6 is the same as the principle of the second rotating mechanism 7, and in addition, the adjustment process of the first displacement mechanism 8 and the second displacement mechanism 9 can also be performed after the adjustment of the first rotating mechanism 6 and the second rotating mechanism 7 is completed.

[0093] The above describes the embodiment of the present embodiment, but the present embodiment is not limited to the specific embodiments described above, and the specific embodiments described above are only illustrative and not limiting, and a person of ordinary skill in the art can make many forms under the inspiration of the present embodiment, which all belong to the protection of the present embodiment.

Claims

1. A hydraulic cylinder machining drilling device, comprising a machine tool for boring a blind hole in the inner wall of a cylinder body, characterized in that: The machine tool is provided with: A first thickness gauge capable of moving along a first path in a first plane; A second thickness gauge capable of moving along a second path in a second plane; A third thickness gauge provided at the origin of a three-axis coordinate system; The Z-axis of the three-axis coordinate system is the machining axis of the machine tool when boring the blind hole in the inner wall of the cylinder body, and the X-axis and Y-axis are parallel to the first plane and the second plane, respectively; A first rotating mechanism for rotating the cylinder body at a point where the spherical head surface of the cylinder body intersects the Z-axis, and the rotation axis is parallel to the Y-axis; A second rotating mechanism for rotating the cylinder body at a point where the spherical head surface of the cylinder body intersects the Z-axis, and the rotation axis is parallel to the X-axis; A first displacement mechanism for linearly moving the cylinder body along the X-axis; A second displacement mechanism for linearly moving the cylinder body along the Y-axis; A clamping mechanism for fixing the cylinder body when the machine tool bores the blind hole in the inner wall of the cylinder body; The first rotating mechanism includes a first track and a first drive mechanism for moving the cylinder body along the first track, the first track is located on a spherical surface with the point where the spherical head surface of the cylinder body intersects the Z-axis as the center, and the first track has the Y-axis as the axis; The first drive mechanism includes a first sliding seat in sliding connection with the first track, the first sliding seat is connected to the cylinder body, the first sliding seat is hinged to the piston rod of a first hydraulic cylinder, and the cylinder base of the first hydraulic cylinder is hinged to the first track; The second rotating mechanism includes a second track and a second drive mechanism for moving the cylinder body along the second track, the second track is provided on the first sliding seat, the second track is located on a spherical surface with the point where the spherical head surface of the cylinder body intersects the Z-axis as the center, and the second track has the X-axis as the axis; The second drive mechanism includes a second sliding seat in sliding connection with the second track, the second sliding seat is connected to the cylinder body, the second sliding seat is hinged to the piston rod of a second hydraulic cylinder, and the cylinder base of the second hydraulic cylinder is hinged to the second track; The second displacement mechanism includes a third sliding seat in sliding connection with the second sliding seat, the third sliding seat is connected to a linear drive mechanism for driving it to linearly move along the Y-axis; The first displacement mechanism includes a fourth sliding seat in sliding connection with the third sliding seat, the fourth sliding seat is connected to a linear drive mechanism for driving it to linearly move along the X-axis.

2. The drilling device for hydraulic cylinder according to claim 1, characterized in that: Further comprising a positioner and a third displacement mechanism for linearly moving the cylinder body along the Z-axis, and the positioner is used to mark a reference point in space, and move the cylinder body along the X-axis, Y-axis and Z-axis until the reference point is located on the surface of the spherical head of the cylinder body.

3. The drilling device for hydraulic cylinder according to claim 1, characterized in that: The clamping mechanism includes clamping pieces provided on both sides of the machine tool, the clamping pieces are rotatably connected to clamping sliding blocks through shafts arranged in the X-axis direction, the clamping sliding blocks can move along the X-axis and Y-axis, and after the cylinder body is positioned, the clamping pieces are moved and rotated to adapt to the positioned cylinder body, and then the cylinder body is clamped and fixed.

4. A blind hole repairing method for oil cylinder processing, using the drilling device for oil cylinder processing according to any one of claims 1-3, characterized in that: The method comprises the following steps: Definition: the machining axis of the machine tool when boring the blind hole in the inner wall of the cylinder body is the Z-axis, the X-axis, Y-axis and Z-axis intersect at the origin, and the X-axis, Y-axis and Z-axis are perpendicular to each other; the first plane and the second plane are parallel to the plane formed by the X-axis and Y-axis; Move the thickness gauge along the first path in the first plane, the first path is in the first plane and parallel to the X-axis, and the midpoint is located on the Z-axis, and the probe of the thickness gauge faces the direction of the Z-axis; The thickness values measured by moving the thickness gauge along the first path are sorted according to the time of measurement to obtain a first thickness sequence, and if there is only one thickness value in the first thickness sequence that is equal to the radius of the ball head, the cylinder body is not moved; If there are two thickness values in the first thickness sequence that are equal to the radius of the ball head, the thickness values between the two thickness values are deleted from the first thickness sequence to generate two first subsequences; The cylinder body is rotated about the point where the surface of the ball head of the cylinder body intersects the Z axis, and the rotation axis is parallel to the Y axis, and the endpoint of the rotation is that the total difference between the thickness values of the two first subsequences is less than a set first difference value; The thickness gauge is moved along a second path in a second plane, the second path is a straight line along the Y axis direction, and the midpoint is located on the Z axis, and the probe of the thickness gauge faces the direction of the Z axis; The thickness values measured by moving the thickness gauge along the second path are sorted according to the time of measurement to obtain a second thickness sequence, and if there is only one thickness value in the second thickness sequence that is equal to the radius of the ball head, the cylinder body is not moved; If there are two thickness values in the second thickness sequence that are equal to the radius of the ball head, the thickness values between the two thickness values are deleted from the second thickness sequence to generate two second subsequences; The cylinder body is rotated about the point where the surface of the ball head of the cylinder body intersects the Z axis, and the rotation axis is parallel to the X axis, and the endpoint of the rotation is that the total difference between the thickness values of the two second subsequences is less than a set first difference value; The cylinder body is moved linearly along the X axis and the Y axis directions until the thickness value measured at the origin is equal to the radius of the ball head; Then the cutter is moved along the Z axis to bore the blind hole of the inner wall of the cylinder body.

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