CN-121988768-A - Machining method of cylinder barrel of oil cylinder and numerical control boring machine

CN121988768ACN 121988768 ACN121988768 ACN 121988768ACN-121988768-A

Abstract

The invention discloses a processing method of an oil cylinder barrel and a numerical control boring machine, wherein the numerical control boring machine comprises a machine tool, a headstock, a guide rail, an oil receiver and an outer circle cutting device arranged between the headstock and the oil receiver, the outer circle cutting device comprises a first moving mechanism, a second moving mechanism and a cutter holder, the first moving mechanism is used for driving the second moving mechanism and the cutter holder to reciprocate on the guide rail, the second moving mechanism is used for driving the cutter holder to reciprocate along the direction perpendicular to the guide rail, and the cutter holder is used for mounting a turning tool for processing an outer circle frame. Therefore, the invention realizes one-time clamping synchronous processing of the inner hole of the cylinder barrel and the outer circle frame position of the oil cylinder by additionally arranging the outer circle cutting device on the numerical control boring machine, eliminates positioning errors and reference conversion errors caused by repeated clamping, greatly improves the coaxiality precision of the inner hole of the cylinder barrel and the outer circle frame position of the oil cylinder, meets the assembly and use requirements of high-precision hydraulic oil cylinders such as the hydraulic support oil cylinder of a coal mine, improves the processing efficiency and shortens the whole production period.

Inventors

ZHONG QINGFU
LI HUAIGUANG
FANG LEI
QIN FENGCAI
WANG DAHAI
ZHANG CHAO
TENG CHAO
LIU ZHENSHENG
LI HANG

Assignees

山东矿机华能装备制造有限公司

Dates

Publication Date: 20260508
Application Date: 20260319

Claims (10)

1. The numerical control boring machine comprises a machine tool, a headstock, a guide rail and an oil receiver, wherein the headstock is arranged at one end of the top of the machine tool, the guide rail is arranged at the top of the machine tool, and the oil receiver is arranged on the guide rail and is in sliding connection with the guide rail; the first moving mechanism is arranged on the guide rail and is in sliding connection with the guide rail, and the first moving mechanism is used for driving the second moving mechanism and the tool apron to move in a reciprocating manner on the guide rail; The second moving mechanism is fixed on the first moving mechanism and is used for driving the tool apron to reciprocate along the direction vertical to the guide rail; The tool apron is fixed in the second moving mechanism, and the tool apron is used for installing a turning tool for machining the outer circle frame.
2. The numerical control boring machine of claim 1, wherein the first moving mechanism comprises a first supporting plate and a first power component, the first supporting plate is arranged on the guide rail in a crossing mode, the first power component drives the first supporting plate to move, and the second moving mechanism is fixed on the first supporting plate.
3. The numerical control boring machine of claim 2, wherein the first power component comprises a first drive motor, a drive gear, and a front rack engaged with the drive gear; the driving gear is fixed on an output shaft of the first driving motor; The front side rack is arranged along the extending direction of the guide rail, and the front side rack is arranged on the side wall of the machine tool.
4. The numerical control boring machine of claim 2, wherein a guide structure is disposed between the guide rail and the first support plate, and the guide structure includes a guide protrusion disposed on a surface of the guide rail and a guide groove disposed at a bottom of the first support plate.
5. The numerical control boring machine of claim 1, wherein the second moving mechanism comprises a linear guide rail, a second supporting plate which is arranged on the linear guide rail and is in sliding connection with the linear guide rail, and a second power component which drives the second supporting plate to move, the linear guide rail is fixed on the first moving mechanism, and the tool apron is arranged on the top of the second supporting plate.
6. The numerical control boring machine of claim 1, wherein a collecting tray is provided between the outer circle cutting device and the headstock, and/or a baffle is provided on a side of the outer circle cutting device.
7. The processing method of the cylinder barrel of the oil cylinder is characterized by comprising the following steps of: clamping an oil cylinder barrel to be processed between a headstock and an oil receiver of the numerical control boring machine according to any one of claims 1 to 6; Step two, processing an inner hole of a cylinder barrel of the oil cylinder and an outer circle frame position, wherein the outer circle frame position processing comprises the following steps: Starting the first moving mechanism, driving the second moving mechanism and the tool apron to move along the guide rail, and stopping moving to the outer circle frame position processing position of the outer wall of the cylinder barrel of the oil cylinder; starting a second moving mechanism to drive the tool apron and the turning tool to move to the cylinder barrel side of the oil cylinder until the turning tool contacts the outer wall of the cylinder barrel of the oil cylinder and stops; According to the size of the outer circle frame, the first moving mechanism is controlled to drive the tool apron and the turning tool to move, so that the turning tool can process the outer circle frame; The processing is completed, controlling the excircle cutting device to drive the tool apron the turning tool moves back to the outer wall of the cylinder barrel of the oil cylinder, so as to avoid the cylinder barrel of the oil cylinder.
8. The method for machining the cylinder barrel of the oil cylinder according to claim 7, wherein the machining of the inner bore of the cylinder barrel in the second step includes the steps of: The outer circle cutting device is controlled to move, a space is reserved between the tool apron, the turning tool and the outer wall of the cylinder barrel of the oil cylinder; According to the parameters of the inner hole of the cylinder barrel of the oil cylinder, the control main shaft drives the boring bar and the boring tool to move, and (5) processing the inner hole.
9. The method of claim 7, wherein the first step specifically comprises: tightly propping one end of a cylinder barrel of an oil cylinder to be processed against a first dental tray, and installing the first dental tray on a headstock; And tightly jacking the other end of the cylinder barrel of the cylinder to be processed with a second dental disc, wherein the second dental disc is arranged on the oil receiver, so that the cylinder barrel of the cylinder to be processed is clamped on a numerical control boring machine, and the first dental disc and the second dental disc are taper self-centering dental discs.
10. The method of claim 9, wherein the taper of the first and second tooth plates is the same as the chamfer of the end of the cylinder barrel to be machined.

Description

Machining method of cylinder barrel of oil cylinder and numerical control boring machine Technical Field The invention relates to the technical field of oil cylinder manufacturing, in particular to a processing method of an oil cylinder barrel and a numerical control boring machine. Background The cylinder barrel of the oil cylinder is a core bearing component of a hydraulic system, is widely applied to the fields of engineering machinery, coal mine machinery (such as a hydraulic support), metallurgical equipment and the like, and directly determines the sealing performance, bearing capacity and service life of the hydraulic oil cylinder by the dimensional accuracy of an inner hole, coaxiality of an outer circular support and surface roughness of the inner circular support. In the prior art, the processing of the inner hole and the outer circle frame of the cylinder barrel of the oil cylinder commonly adopts a process scheme of step clamping and sequential processing, and part of the process is also added with a plurality of clamping and correcting processes to try to correct processing deviation. This step-by-step processing mode has technical drawbacks that are difficult to overcome, mainly in the following respects: 1. The coaxiality error is large, in the process of repeated clamping, the positioning reference of a workpiece is converted, the clamping error, the tool centering error and the repeated positioning error of a machine tool are transmitted in a superposition way, so that the coaxiality of an inner hole axis and an outer circle rack axis is difficult to control, and the coaxiality can only reach the tolerance grade of more than phi 0.1mm, and the assembly requirement of a high-precision hydraulic cylinder (such as a hydraulic support cylinder phi 0.05mm of a coal mine) cannot be met, so that the problems of cylinder piston movement clamping stagnation, aggravation of abrasion of a sealing element, hydraulic system leakage and the like are caused. 2. The machining efficiency is low, the cost is high, the workpiece is required to be clamped, corrected and disassembled for multiple times in step machining, the manual operation strength and the equipment input cost are increased, the whole production period is prolonged, and the large-scale and high-efficiency production requirements are difficult to adapt. 3. The unified difficulty of the standard is great, in the prior art, part of schemes try to process an inner hole or an outer circle by adopting one-time clamping, but the scheme is limited by the problem of interference between a machine tool structure and a cutter, and the inner hole cutting and the outer circle frame turning cannot be completed at the same time. If the compound machine tool is adopted for processing, the problems of high equipment acquisition cost and complex process debugging exist, and small and medium enterprises are difficult to bear, so that the popularity of the technical scheme is low. In summary, the existing processing technology of the inner hole and the outer circle frame of the cylinder barrel of the oil cylinder cannot be compatible with processing precision and production efficiency due to inherent defects of positioning reference conversion and repeated clamping error superposition, and the existing improvement scheme is limited by equipment cost or process feasibility and is difficult to widely popularize in industry. Disclosure of Invention Aiming at the defects, the invention aims to provide the processing method of the cylinder barrel of the oil cylinder and the numerical control boring machine, so that one-time clamping synchronous processing of the inner hole and the outer circle frame position of the cylinder barrel is realized, positioning errors and reference conversion errors caused by repeated clamping are eliminated, the coaxiality precision of the inner hole and the outer circle frame position of the cylinder barrel is improved, the assembly and use requirements of high precision are met, the processing efficiency is improved, and the whole production period is shortened. In order to solve the technical problems, the technical scheme of the invention is as follows: The numerical control boring machine comprises a machine tool, a headstock, a guide rail and an oil receiver, wherein the headstock is arranged at one end of the top of the machine tool, the guide rail is arranged at the top of the machine tool, the oil receiver is arranged on the guide rail and is in sliding connection with the guide rail, the numerical control boring machine further comprises an excircle cutting device arranged between the headstock and the oil receiver, the excircle cutting device comprises a first moving mechanism, a second moving mechanism and a cutter holder, the first moving mechanism is arranged on the guide rail and is in sliding connection with the guide rail, the first moving mechanism is used for driving the second moving mechanism and the cutter holder to