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CN-122007475-A - Deep hole machining device and method for packer

CN122007475ACN 122007475 ACN122007475 ACN 122007475ACN-122007475-A

Abstract

The invention relates to a deep hole machining device and method for a packer, and belongs to the technical field of packer machining. The automatic feeding device comprises a body, a clamping rotating structure and a processing feeding structure are sequentially arranged on the body along the axial direction of a workpiece, a packer workpiece is coaxially clamped and fixed on the clamping rotating structure, a floating guide centering assembly is arranged at the processing end of the processing feeding structure, a self-adaptive follow-up assembly is arranged on the body corresponding to the middle section position of the packer workpiece, and an on-line monitoring assembly is respectively arranged on the floating guide centering assembly and the self-adaptive follow-up assembly. According to the invention, through the cooperative linkage of the structural components, the precise clamping and rotation of a packer workpiece, the high-precision feeding of a drilling head, the precise guiding and centering in the drilling process and the elastic close-range follow-up support of a cutting area are realized, and the on-line monitoring and the numerical control closed-loop adjustment are combined, so that the eccentric error is corrected in real time, and the machining vibration is restrained.

Inventors

  • QI SHIJUN
  • ZHANG CHAO

Assignees

  • 大庆市腾飞石油机械有限公司

Dates

Publication Date
20260512
Application Date
20260407

Claims (10)

  1. 1. The deep hole machining device for the packer is characterized by comprising a body (1), wherein a clamping rotating structure (2) and a machining feeding structure (4) are sequentially arranged on the body (1) along the axial direction of a workpiece, the packer workpiece (3) is coaxially clamped and fixed on the clamping rotating structure (2), a floating guide centering assembly (5) is arranged at the machining end of the machining feeding structure (4), an adaptive follow-up assembly (6) is arranged on the body (1) corresponding to the middle section of the packer workpiece (3), an online monitoring assembly (7) is respectively arranged on the floating guide centering assembly (5) and the adaptive follow-up assembly (6), and a numerical control structure (8) electrically connected with each structure and each assembly is arranged on the body (1); The floating guide centering assembly (5) is used for realizing the accurate centering of the drilling head of the machining feeding structure (4) and the pre-orifice of the packer workpiece (3); The self-adaptive follow-up assembly (6) is used for synchronously feeding along with the drilling head in the axial direction, carrying out elastic near-distance support on the packer workpiece (3) and inhibiting workpiece vibration in the machining process in real time; The on-line monitoring component (7) is used for collecting radial eccentric data of the packer workpiece (3) and workpiece vibration data in the machining process in real time; The numerical control structure (8) is used for controlling the actions of all the structures and the components and realizing closed-loop adjustment of the machining process.
  2. 2. The deep hole machining device for the packer according to claim 1, wherein the clamping and rotating structure (2) comprises a driving motor (201) fixedly installed on the body (1), a clamping piece (202) is coaxially connected with a driving end of the driving motor (201) in a driving mode, and the clamping piece (202) is a three-jaw self-centering chuck and can coaxially clamp and fix packer workpieces (3) with different outer diameter specifications.
  3. 3. Deep hole machining device for packer according to claim 2, characterized in that the machining feeding structure (4) comprises a servo motor (401) fixedly mounted on the body (1), a screw rod (402) axially arranged along the workpiece is coaxially and drivingly connected to the driving end of the servo motor (401), a sliding seat (403) is slidably connected to the screw rod (402), a first mounting plate (404) is fixedly connected to the sliding seat (403), a drilling device (405) is fixedly mounted on the first mounting plate (404), and the machining end of the drilling device (405) is a drilling head capable of axially feeding.
  4. 4. The deep hole machining device for the packer according to claim 3, wherein the floating guide centering assembly (5) comprises a plurality of elastic telescopic rods (501) which are uniformly distributed along the circumferential direction of the drilling head, fixed ends of the elastic telescopic rods (501) are fixedly arranged on the surface of a shell of the drilling equipment (405) through bolts, telescopic ends of the elastic telescopic rods (501) are fixedly connected to a guide sleeve base (502) through bolts, a round hole through which the drilling head can freely pass is formed in the central position of the guide sleeve base (502), and the axis of the round hole coincides with the axis of the drilling head.
  5. 5. The deep hole processing device for the packer according to claim 4, wherein an inner layer guide sleeve (503) is fixedly installed on the inner side of the front end of the guide sleeve base (502), a guide conical surface (504) which is matched with a pre-orifice of a packer workpiece (3) is arranged at the front end of the inner layer guide sleeve (503), a floating guide sleeve (505) is sleeved on the outer side of the inner layer guide sleeve (503), a plurality of elastic reset pieces (506) are uniformly installed between the floating guide sleeve (505) and the inner layer guide sleeve (503) in the circumferential direction, two groups of radial servo push rods (507) are orthogonally arranged on the outer circumference of the floating guide sleeve (505), and each group of servo push rods (507) are oppositely arranged and the telescopic ends of the servo push rods are in butt joint with the outer wall of the floating guide sleeve (505) through spherical ejection heads.
  6. 6. The deep hole processing device for the packer according to claim 5, wherein the self-adaptive follow-up assembly (6) comprises two follow-up sliding grooves (601) which are formed in parallel on the body (1) along the axial direction of the workpiece, a follow-up sliding block (602) is connected inside the follow-up sliding grooves (601) in a sliding mode, a rigid connecting plate I (603) is fixedly connected between the follow-up sliding block (602) and a mounting plate I (404) of the processing feeding structure (4), the self-adaptive follow-up assembly (6) is synchronously axially fed along the follow-up sliding grooves (601) along the connecting plate I (603) along with the mounting plate I (404), a connecting piece (604) is vertically and fixedly installed on the follow-up sliding block (602), and an arc-shaped frame (605) for wrapping the workpiece (3) of the packer is fixedly connected to the top end of the connecting piece (604).
  7. 7. The deep hole processing device for the packer of claim 6, wherein three mounting plates II (606) are uniformly arranged on the inner wall of the arc-shaped frame (605) along the circumferential direction, a small hydraulic cylinder (607) is radially arranged on the mounting plates II (606) along the arc-shaped frame (605), a telescopic cylinder (608) is fixedly connected to the telescopic end of the small hydraulic cylinder (607), a floating supporting claw (609) which is matched with the outer circle of the packer workpiece (3) is arranged at one end of the telescopic cylinder (608) far away from the small hydraulic cylinder (607), the floating supporting claw (609) is axially corresponding to a cutting point of the drilling head and is arranged in a short distance and is used for elastically supporting the packer workpiece (3) in a cutting area, a plurality of small nylon rollers (610) which are axially arranged along the workpiece are arranged at the inner sides of the floating supporting claws (609), and disc springs (611) sleeved at the telescopic end of the small hydraulic cylinder (607) are arranged inside the telescopic cylinder (608).
  8. 8. The deep hole processing device for the packer according to claim 7, wherein the online monitoring assembly (7) comprises an eddy current displacement sensor (701) and a piezoelectric vibration sensor (702), the eddy current displacement sensor (701) is provided with two groups, the eddy current displacement sensor is respectively and orthogonally arranged at the front end of a guide sleeve base (502) of the floating guide centering assembly (5) along the horizontal direction and the vertical direction, and a sensor probe is opposite to the outer circle surface of the packer workpiece (3).
  9. 9. The deep hole machining apparatus for packers according to claim 8, wherein the piezoelectric vibration sensor (702) is embedded inside the telescopic cylinder (608) for detecting the vibration amplitude and frequency of the work piece at the floating support jaw (609).
  10. 10. A method of processing a deep hole processing apparatus for a packer, which is applied to the deep hole processing apparatus for a packer according to claim 9, characterized by comprising the steps of: S1, workpiece clamping and positioning, namely coaxially clamping a packer workpiece (3) on a clamping piece (202) of a clamping rotary structure (2), setting processing parameters by a numerical control structure (8), controlling a self-adaptive follow-up assembly (6) to move to a workpiece to-be-processed end along with a first mounting plate (404), starting a small hydraulic cylinder (607) to flexibly attach a floating supporting claw (609) to the excircle of the workpiece, and pre-tightening a belleville spring (611) to finish primary vibration reduction supporting; S2, guiding centering pre-alignment, wherein a numerical control structure (8) controls a servo motor (401) of a machining feeding structure (4) to drive a screw rod (402) to drive a sliding seat (403) to move towards a workpiece, a self-adaptive follow-up assembly (6) advances synchronously, a front end guiding conical surface (504) of an inner layer guiding sleeve (503) is attached to a pre-orifice of the workpiece, an elastic telescopic rod (501) stretches naturally, a servo push rod (507) resets to drive a floating guiding sleeve (505) to coaxially center with the inner layer guiding sleeve (503) and the pre-orifice; S3, starting an on-line monitoring assembly (7), acquiring radial eccentric data of workpiece rotation by two groups of orthogonal eddy current displacement sensors (701), acquiring workpiece vibration data at a floating supporting claw (609) by a piezoelectric vibration sensor (702), and transmitting all monitoring data to a numerical control structure (8) in real time to wait for a processing instruction; S4, controlling a driving motor (201) to drive a workpiece to rotate by a numerical control structure (8), continuously feeding a drilling head along with a sliding seat (403), synchronously advancing a self-adaptive follow-up assembly (6), enabling the drilling head to enter cutting through a guide sleeve base (502), synchronously compressing an elastic telescopic rod (501), enabling an inner guide sleeve (503) to be tightly attached to an orifice for guiding, adjusting by the numerical control structure (8) according to monitoring data, finely adjusting a servo push rod (507) when the eccentric value exceeds a threshold value, increasing the supporting pressure of a hydraulic cylinder when the vibration exceeds the threshold value, and correcting errors and inhibiting vibration in real time; S5, after the drilling head finishes the machining stroke, the numerical control structure (8) controls the drilling head to reversely retract, the self-adaptive follow-up assembly (6) synchronously retreats, the elastic telescopic rod (501) resets, the floating guide centering assembly (5) is separated from the workpiece, the clamping rotating structure (2) is closed, the machined workpiece is taken down, and finally the self-adaptive follow-up assembly (6) and the belleville spring (611) are controlled to reset to the initial position, so that the machining is finished.

Description

Deep hole machining device and method for packer Technical Field The invention relates to the technical field of packer processing, in particular to a deep hole processing device and method for a packer. Background The packer is used as a core component in the field of oil and gas exploitation, the key structures such as a cylinder body and a mandrel of the packer are mostly elongated metal parts, a high-precision deep hole needs to be machined, and the coaxiality and straightness of the deep hole directly determine the sealing performance and the working stability of the packer, so that the requirement on the precision and the stability of deep hole machining is severe. At present, the deep hole processing of a packer mostly adopts a traditional deep hole drilling machine, a workpiece is fixed through a simple clamping structure, a feeding structure drives a drill bit to process, the equipment has the technical defects that firstly, a special guiding centering structure is lacked, the drill bit is not continuously and accurately guided during feeding, the eccentric deep hole is easily caused by workpiece clamping errors and drill bit deflection, and the processing precision is difficult to guarantee, secondly, aiming at the processing of an elongated workpiece of the packer, a cutting area is not provided with a close-range follow-up supporting structure, the workpiece is easily vibrated and deflected greatly in the processing process, the processing precision is easily influenced, the drill bit is easily worn, the surface of the workpiece is easily scratched, the yield is reduced, thirdly, a real-time monitoring and closed-loop adjusting mechanism is not needed in the processing process, eccentric vibration data of the workpiece cannot be timely captured, the detection can only be carried out after the processing is finished, if errors are found, the workpiece is directly scrapped, the waste of materials and the processing cost is caused, fourthly, each processing structure independently acts, cooperative linkage control is not needed, the processing automation degree is low, manual frequent manual intervention is needed, the processing efficiency is low, and additional errors are easily introduced by manual operation. Therefore, the application provides a deep hole processing device and a deep hole processing method for a packer, which meet the demands. Disclosure of Invention The invention aims to solve the technical problems of inaccurate clamping, discontinuous centering and guiding, lack of elastic support in a cutting area, lack of real-time monitoring and closed-loop adjustment in a processing process and incapability of cooperative linkage of structures by providing a deep hole processing device and a deep hole processing method for a packer. In order to solve the technical problems, the invention provides the following technical scheme: A deep hole machining device for a packer comprises a body, a clamping rotating structure and a machining feeding structure are sequentially arranged on the body along the axial direction of a workpiece, a packer workpiece is coaxially clamped and fixed on the clamping rotating structure, a floating guide centering assembly is arranged at the machining end of the machining feeding structure, an adaptive follow-up assembly is arranged on the body corresponding to the middle section of the packer workpiece, on-line monitoring assemblies are respectively arranged on the floating guide centering assembly and the adaptive follow-up assembly, numerical control structures electrically connected with the structures and the assemblies are arranged on the body, the floating guide centering assembly is used for realizing accurate centering of a drilling head of the machining feeding structure and a pre-orifice of the packer workpiece, the adaptive follow-up assembly is used for synchronous axial feeding along with the drilling head and carrying out elastic near-distance support on the packer workpiece and suppressing workpiece vibration in the machining process in real time, the on-line monitoring assemblies are used for collecting radial eccentric data of the packer workpiece and workpiece vibration data in the machining process in real time, and the numerical control structures are used for controlling the actions of the structures and the assemblies and realizing closed-loop adjustment of the machining process. Optionally, the centre gripping revolution mechanic includes fixed mounting on the body driving motor, driving end coaxial drive of driving motor is connected with the clamping piece, the clamping piece is three-jaw self-centering chuck, can coaxial clamp the packer work piece of fixed different external diameter specifications. Optionally, the processing feeding structure comprises a servo motor fixedly mounted on the body, a screw rod axially arranged along the workpiece is coaxially driven and connected with the driving end of the servo motor, a sliding seat is