阅读说明：本技术 一种多冲程与单冲程复合珩磨工艺 (Multi-stroke and single-stroke composite honing process ) 是由 荆兴亚 景军清 邵宗光 徐�明 于 2020-07-06 设计创作，主要内容包括：本发明公布一种多冲程与单冲程复合珩磨工艺,属于阀芯孔加工技术领域。包括如下步骤：A．采用多冲程珩磨工艺对单个片式多路阀的阀芯孔进行珩磨,片式多路阀的阀芯孔形成连续网纹；B．将多个片式多路阀联接,装配拧紧；采用单冲程珩铰工艺对装配后的片式多路阀的阀芯孔进行珩铰。本发明基于多冲程珩磨和单冲程珩铰复合工艺,多冲程珩磨采用在线测量反馈系统,构建参数与误差间的数学模型,实时反馈与补偿到转速、进给等控制参数,提高单体珩磨精度；采用单冲程珩铰工艺整体修珩装配拧紧后变形阀体,通过刀头和夹具双浮动形式,提高整体珩磨精度,解决阀芯孔装配变形造成的卡滞问题,对液压阀制造同行企业具有一定的借鉴意义。(The invention discloses a multi-stroke and single-stroke composite honing process, and belongs to the technical field of valve core hole machining. The method comprises the following steps: A. honing the valve core hole of a single sheet type multi-way valve by adopting a multi-stroke honing process, and forming continuous reticulate patterns by the valve core hole of the sheet type multi-way valve; B. connecting a plurality of sheet type multi-way valves, assembling and screwing; and honing and reaming the valve core hole of the assembled sheet type multi-way valve by adopting a single-stroke honing and reaming process. The multi-stroke honing and single-stroke honing and reaming combined process is based on the multi-stroke honing and single-stroke honing and reaming combined process, the multi-stroke honing adopts an online measurement feedback system, a mathematical model between parameters and errors is constructed, control parameters such as rotating speed, feeding and the like are fed back and compensated in real time, and the single honing precision is improved; the valve body is deformed after the valve body is integrally repaired, honed, assembled and screwed down by adopting a single-stroke honing and reaming process, the integral honing precision is improved through a double-floating mode of the tool bit and the clamp, the clamping stagnation problem caused by the assembly deformation of the valve core hole is solved, and the valve body has certain reference significance for hydraulic valve manufacturing enterprises.)

1. A multi-stroke and single-stroke composite honing process is characterized in that: the method comprises the following steps:

A. honing the valve core hole of a single sheet type multi-way valve by adopting a multi-stroke honing process, and forming continuous reticulate patterns by the valve core hole of the sheet type multi-way valve;

B. connecting a plurality of sheet type multi-way valves, assembling and screwing; and honing and reaming the valve core hole of the assembled sheet type multi-way valve by adopting a single-stroke honing and reaming process.

2. A multi-stroke and single-stroke compound honing process according to claim 1 wherein: the multi-stroke honing process in the step A comprises the following steps,

feeding back working condition parameters of cutting torque and expansion force and error data of the shape and the size of a valve hole in the machining process in real time through an online measurement feedback system;

constructing a mathematical model among the error data, the working condition parameters and the control parameters;

and optimizing the control parameters through a real-time compensation algorithm to realize the online dynamic compensation of the control parameters.

3. A multi-stroke and single-stroke compound honing process according to claim 1 or 2, wherein: and in the step B, the tool bit and the clamp adopt a double-floating mode in the single-stroke honing and reaming process.

Technical Field

The invention relates to the technical field of valve core hole machining, in particular to a multi-stroke and single-stroke compound honing process.

Background

The precision processing scheme of the valve core hole in the same industry is multi-stroke honing or single-stroke honing, the two processes have advantages and disadvantages respectively, the multi-stroke honing has advantages for ensuring the straightness of the valve hole, the single-stroke honing has advantages for ensuring the roundness of the valve hole, and the two processes are used independently and hardly reach the design requirement of the cylindricity of 3 mu m. For the chip type multi-way valve, after the valve body of the single chip honing is assembled, the valve core hole with the ultra-large length-diameter ratio is deformed due to the tightening torque, the matching precision of the valve rod and the valve core hole is reduced, and the problem of valve rod clamping stagnation is caused.

The Chinese patent discloses an inner hole honing process (CN 108907907A), which comprises the following steps: A. detecting; B. positioning; C. the honing plate is tightly propped against the inner hole; D. honing; E. and removing dandruff. This scheme can carry out the honing to differential mechanism housing's centre bore, half shaft hole and two planet shaft holes simultaneously, has improved differential mechanism housing hole honing's efficiency greatly to improve the effective rate of honing through detecting, improve differential mechanism housing hole honing's precision through location and antidandruff, thereby improved differential mechanism housing's processingquality.

The above technology has the following disadvantages:

1. the inner hole honing process mentioned in the patent can not realize on-line detection and real-time compensation, and has poor operability;

2. the inner hole honing process form stated in the patent is only suitable for a single valve body structure, can not solve the problem of valve core hole deformation clamping stagnation after assembly and screwing, is not suitable for chip type multi-way valve core hole honing, and is not favorable for market popularization.

Disclosure of Invention

In order to solve the technical problem, the invention provides a multi-stroke and single-stroke compound honing process.

The invention is realized by the following technical scheme: a multi-stroke and single-stroke compound honing process comprises the following steps: A. honing the valve core hole of a single sheet type multi-way valve by adopting a multi-stroke honing process, and forming continuous reticulate patterns by the valve core hole of the sheet type multi-way valve; B. connecting a plurality of sheet type multi-way valves, assembling and screwing; and honing and reaming the valve core hole of the assembled sheet type multi-way valve by adopting a single-stroke honing and reaming process.

The multi-stroke honing process in the step A comprises the following steps,

feeding back working condition parameters of cutting torque and expansion force and error data of the shape and the size of a valve hole in the machining process in real time through an online measurement feedback system;

constructing a mathematical model among the error data, the working condition parameters and the control parameters;

and optimizing the control parameters through a real-time compensation algorithm to realize the online dynamic compensation of the control parameters.

And in the step B, the tool bit and the clamp adopt a double-floating mode in the single-stroke honing and reaming process.

Compared with the prior art, the invention has the beneficial effects that:

based on a multi-stroke honing and single-stroke honing and reaming composite process, an online measurement feedback system is adopted for multi-stroke honing, a mathematical model between parameters and errors is constructed, control parameters such as rotating speed, feeding and the like are fed back and compensated in real time, and the precision of monomer honing is improved;

2, the valve body is deformed after the valve body is integrally repaired, honed, assembled and screwed down by adopting a single-stroke honing and reaming process, the integral honing precision is improved through a double-floating mode of the tool bit and the clamp, and the problem of clamping stagnation caused by assembly deformation of the valve core hole is solved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A multi-stroke and single-stroke compound honing process comprises the following steps:

A. honing the valve core hole of a single sheet type multi-way valve by adopting a multi-stroke honing process, and forming continuous reticulate patterns by the valve core hole of the sheet type multi-way valve;

1.1, receiving a valve body to be processed and a self-checking recording list, confirming that the valve body is roughly cleaned, and returning to a cleaning process if the valve body is not roughly cleaned;

1.2 calling and confirming a processing program according to a product drawing number and a process parameter attached table, selecting and installing a tool and a cutter, aligning the tool, and then closing a protective door;

1.3, confirming that no flash, burr, rust, bump and the like exist on the surface of the valve body, confirming that no scratch exists in the valve core hole, if yes, marking and then independently storing, and informing an inspector to process;

1.4, selecting any cross section in the valve hole, measuring the size of the valve core hole before honing, confirming that the tolerance is in the range required by an attached table, and if the tolerance is out of tolerance, marking and separately storing the valve core hole, and informing an inspector of processing;

1.5 cleaning up the positioning surface of the tool, clamping the workpiece according to the diagram and ensuring correct positioning; in the installation process, the processed surface cannot be collided or scratched;

1.6, starting processing after confirming that the parameter settings are correct;

the multi-stroke honing process comprises an online detection and real-time compensation technology and is based on control parameters such as feed amount, rotating speed and the like;

working condition parameters such as cutting torque, expansion force and the like and valve hole shape and size error data in the machining process are fed back in real time through an online measurement feedback system, a mathematical model among the error data, the working condition parameters and the control parameters is constructed, the control parameters are optimized through a real-time compensation algorithm, and online dynamic compensation is realized. Therefore, the problem of dynamic compensation of non-uniform grinding force under the conditions of high length-diameter ratio, non-continuity and multiple sections is solved, and the high-efficiency grinding requirements of high dimensional accuracy, high cylindricity, high finish and high consistency are met;

1.7 disassembling the processed workpiece, checking whether the valve core hole has defects such as scratches or not, if yes, storing the valve core hole independently and informing an inspector of processing; and (5) detecting the size of the valve core hole by using an electronic three-point inside micrometer according to the requirement of a recording meter and recording.

B. Connecting a plurality of sheet type multi-way valves, assembling and screwing; honing and reaming the valve core hole of the assembled plate type multi-way valve by adopting a single-stroke honing and reaming process;

2.1 conjunct;

firstly, connecting the valve bodies according to the process requirements of an assembly operation instruction;

checking whether the code printing of the valve body is clear or not, and recording the serial number of the workpiece assembly and the serial number of each valve body;

2.2 checking the workpiece fixture;

checking a fixture positioning surface;

checking and confirming that the surface of a workpiece to be subjected to honing and reaming and the valve core hole are not collided or scratched, and no obvious burrs exist at the hole opening and the groove of the valve core hole;

2.3 clamping the workpiece;

cleaning residual cutting fluid on the bottom surface and the positioning surface of the clamp, and wiping the residual cutting fluid clean by using industrial wiping paper;

secondly, the combined small digging valve is hoisted on the clamp to ensure that the workpiece is aligned with the positioning surface of the clamp,

installing a guide tool to ensure that the upper hole of the guide plate is aligned with the hole of the valve body and the bottom surface of the guide plate is aligned with the plane of the working connection valve body;

inserting the two mandrels into the guide plate hole and the valve hole of the working union valve body to ensure that the two mandrels can be completely inserted;

fifthly, after the mandrel is installed, fixing the guide plate on the valve body by using an M4 hexagon socket wrench and a bolt, after the guide plate is fixed, pulling out the mandrel, and sequentially installing the rest guide plates;

2.4, feeding;

firstly, hoisting a clamp for clamping the valve body to a feeding mechanism by a crane;

secondly, after the valve body is determined to be clamped correctly again, two bolts on the clamp are screwed down manually, so that the bolts tightly push the valve body;

thirdly, pushing the clamp through a feeding mechanism, pushing the clamp onto a honing machine working platform, and then inserting two positioning pins into positioning holes of the clamp and the working platform (ensuring that the positioning pins are completely inserted);

fourthly, rechecking whether the valve body is clamped in place or not;

2.5, processing;

firstly, a tool bit and a clamp adopt a double-floating mode, a numerical control program is selected, and machining is started;

secondly, paying attention to abnormal sound and alarm in the processing process;

2.6 blanking;

firstly, before a workpiece is disassembled, whether a valve hole is processed in place is checked;

blowing the lubricating liquid and scrap iron on the surface of the valve body and in each hole by using compressed air;

thirdly, pulling the clamp out of the workbench, then hanging the workpiece and the clamp down by using a traveling crane, detaching the guide plate, and loosening the puller bolt;

fourthly, checking whether the valve hole is scratched or not, and moving the valve hole back and forth by using the core rod to judge whether the valve hole is smooth or not;

2.7, checking;

firstly, a workpiece is hung to an assembly workbench by a traveling crane for inspection;

measuring the size of the valve hole after the hinge is honed by using a momentum meter and making corresponding records on a recording table;

thirdly, the valve body after being inspected is transferred to the next procedure, if unqualified workpieces appear, the valve body is marked and needs to be processed by an inspector;

2.8, adjusting the cutter;

controlling the size of the valve hole between phi 14.9985 and phi 15.000 after honing and reaming, and adjusting the diameter of a cutter (the size of the cutter is adjusted to be 15.000 as much as possible) according to the measured size of the valve hole after honing and reaming;

firstly, a 12mm open spanner is used for clamping a cutter bar and a nut on the upper part of a cutter sleeve, and the nut is screwed clockwise (only the nut is screwed off, but not too much);

secondly, a 12mm open spanner is used for clamping the cutter bar and the nut at the lower part of the cutter sleeve, and the nut is screwed in the anticlockwise direction (the diameter is enlarged by about 1 mu m by rotating the spanner by 15 degrees according to the measured dimension;

and thirdly, after the second step is executed, a 12mm open spanner is used for clamping the cutter bar and the nut on the upper part of the cutter sleeve, the nut is tightly driven by a counterclockwise needle, the size of the valve hole is measured after the cutter is adjusted, and the machining is continued after the requirement is met.

The embodiment aims at the problems of low machining precision and assembly deformation of a valve core hole of a chip multi-way valve, and discloses a multi-stroke and single-stroke composite honing process.

The embodiment combines the process characteristics of multi-stroke honing and single-stroke honing and reaming, adopts the multi-stroke honing process of the valve core hole with multiple punching and single punching to ensure the straightness, ensures the roundness in a single stroke, controls the diameter tolerance of the valve core hole to be less than or equal to 0.003mm, controls the roughness to be less than or equal to Ra0.2 and controls the cylindricity to be within 3 mu m, thereby reaching the international advanced level.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.