A new process for machining valve holes of high-pressure plate valve combination valve and a special fixture thereof

Abstract

A new process for machining valve hole of high-pressure plate valve combination valve and a special fixture thereof, comprising the following steps: step one, using a numerical control machine tool to machine the positioning surface blank hole of the valve body into a shape; step two, expanding the hole, leaving a first excess amount of the valve hole diameter; step three, reaming the hole, leaving a second excess amount of the valve hole diameter, the rotating speed of the main shaft is a first rotating speed, the feeding amount is a first feeding amount, and the load current proportion is less than 15%; step four, assembling the valve, assembling the required plate valve to form a combination valve body, and uniformly assembling the torque; and step five, precision honing, putting the assembled combination valve body into a honing workbench simple tool fixture to hone the valve hole. The present application can effectively solve the technical problems of deformation after assembly, roundness, cylindricity and straightness out-of-tolerance, effectively reduce the labor intensity in the valve body carrying process, and ensure the positioning stability, clamping speed and reliability, and the precision requirement of the valve hole, thereby improving the product quality.

Description

TECHNICAL FIELD

[0001] The present application relates to valve body processing technical field, specifically speaking, it is a kind of high-pressure slice valve combination valve valve hole processing new process and its special fixture. BACKGROUND

[0002] Valve body is a kind of common hydraulic parts, is indispensable important parts in hydraulic control valve, valve body parts valve hole is matched with valve core quantity, and size and shape tolerance requirement is very high, as shown in the attached Figure 1 Figure: the size tolerance band of general valve hole is 0.005-0.008, the roughness of hole is Ra0.2, the cylindricity of hole is 0.003;In the processing of valve hole, generally adopt single piece processing mode, after processing detection can meet the tolerance requirement, but in the final detection after tightening torque assembly, affected by screw torque, hole figure is bent, hole diameter size appears oval deformation about 0.006-0.01mm, cylindricity will be worse to 0.012 or even more, directly cause valve core to be stuck in valve hole, easy to cause the damage of whole machine, can not meet the use requirement;Therefore, this single processing mode can not meet the demand of workpiece batch processing, can not reach the purpose of saving time, labor and energy saving, most importantly, it can not meet the technical problem of hole diameter deformation, roundness, cylindricity and straightness out-of-tolerance caused by assembly clamping pressure. SUMMARY

[0003] In view of the above defects existing in the prior art, the purpose of the present application is to provide a kind of high-pressure slice valve combination valve valve hole processing new process and its special fixture, effectively solve the technical problem of valve hole deformation, roundness, cylindricity and straightness out-of-tolerance caused by assembly clamping force, improve production processing efficiency and save energy.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] A kind of high-pressure slice valve combination valve valve hole processing new process, comprising the following steps:

[0006] Step one: use numerical control machine tool to process valve body positioning surface blank hole into shape;

[0007] Step two: reaming, use probe to correct hole center, define coordinate system, prepare processing program, then reaming is carried out in machining center, valve hole diameter has first excess amount;

[0008] Step three: reaming, according to assembly mode, tighten the same torque, use precision reamer with internal cooling hole, internal cooling and external cooling are carried out simultaneously during processing;Use micrometer to check and adjust the each tool face of reamer, the radial runout of blade cannot be greater than 0.003;

[0009] The machining is programmed, the valve hole diameter has a second excess amount, the rotating speed of the main shaft is a first rotating speed, the feeding amount is a first feeding amount, and the load current proportion is less than 15%;

[0010] Step four: assemble the valve, use the first fixed plate and the second fixed plate to assemble the required valve to form a combined valve body, and uniformly assemble the torque;

[0011] Step five: precision honing, the assembled combined valve body is clamped into the honing workbench simple fixture, the gasket and the positioning plate are used to improve the positioning accuracy of the combined valve body, the adjusting rod is used to adjust the first rotating disc to the machining angle, and the valve hole is honed.

[0012] The valve hole honing is performed three times;

[0013] The first honing uses a first tool with a diameter of the valve hole diameter minus 0.015-0.020mm, the main shaft rotating speed is a second rotating speed, and the feeding amount is a second feeding amount;

[0014] The second honing uses a second tool with a diameter of the valve hole diameter minus 0.005-0.010mm, the main shaft rotating speed is a second rotating speed, and the feeding amount is a second feeding amount;

[0015] The third honing uses a third tool with a diameter of the valve hole diameter plus 0.003-0.000mm, the main shaft rotating speed is a second rotating speed, and the feeding amount is a second feeding amount.

[0016] The machining center is a 3-axis or 4-axis machining center.

[0017] The first excess amount is 1-2mm.

[0018] The second excess amount is 0.05-0.08mm.

[0019] The first rotating speed is 1200-1500n / min, and the first feeding amount is 0.8-1.2mm / n.

[0020] The second rotating speed is 200-400n / min, and the second feeding amount is 20-40mm / min.

[0021] A special fixture for a new high-pressure valve assembly valve hole machining process, comprising a first support seat, a second support seat, a bottom plate, and a clamping assembly;

[0022] The first support seat is provided with a first rotating shaft, the first rotating shaft is provided with a first rotating disc, and the first support seat is provided with an adjusting rod for adjusting the angle of the first rotating shaft;

[0023] The second support seat is provided with a second rotating shaft, and the second rotating shaft is provided with a second rotating disc; the first rotating shaft and the first rotating disc rotate synchronously, and the second rotating shaft and the second rotating disc rotate synchronously;

[0024] A bottom plate is arranged between the first rotating disc and the second rotating disc, and the bottom plate is provided with at least four positioning holes;

[0025] The clamping assembly comprises a positioning plate, a backing plate and a fixing plate;

[0026] The fixing plate comprises a first fixing plate and a second fixing plate, and the first fixing plate and the second fixing plate combine at least two valve bodies together to form a combined valve body;

[0027] The backing plate is one of a long backing plate, a short backing plate and a middle backing plate, or at least two combinations thereof, and the backing plate is used for supporting the combined valve body; a bolt is used to pass through the positioning hole, the backing plate and a preset mounting hole at the bottom of the combined valve body to be connected;

[0028] The positioning plate is one of a long positioning plate, a short positioning plate and a middle positioning plate, or at least two combinations thereof, and the positioning plate is arranged at the rear end surface of the combined valve body.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] The present application can effectively solve the technical problems of deformation of the clamping force after assembly, and out-of-tolerance of roundness, cylindricity and straightness, can effectively reduce the labor intensity in the valve body carrying process, is stable in positioning, fast and reliable in clamping, can guarantee the precision requirement of the valve body hole, improves the product quality, and realizes no alignment, fast hydraulic clamping and assembly line production, and greatly improves the production efficiency in batch production. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a size schematic view of a valve body processed by a new valve hole processing technology of a high-pressure disc valve combined valve of the present application;

[0032] Figure 2 is a single valve body part structure schematic view of the present application;

[0033] Figure 3 is a combined valve body clamping schematic view of the present application;

[0034] Figure 4 is a combined valve body structure schematic view of the present application;

[0035] Figure 5 is a combined valve body special fixture structure schematic view of the present application;

[0036] In the figure: 1, the first support seat; 2, the second support seat; 31, the first rotating shaft; 32, the second rotating shaft; 41, the first rotating disc; 42, the second rotating disc; 5, the bottom plate; 6, the long positioning plate; 7, the short positioning plate; 8, the long gusset plate; 9, the short gusset plate; 10, the middle gusset plate; 11, the middle positioning plate; 12, the first fixed plate; 13, the second fixed plate. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] Please refer to Figures 3 to 5 The present application provides a special fixture for a new process of machining valve hole of a high-pressure plate valve combination valve, comprising a first support seat 1, a second support seat 2, a bottom plate 5, and a clamping assembly; the first support seat 1 is provided with a first rotating shaft 31, the first rotating shaft 31 is provided with a first rotating disc 41, the first support seat 1 is provided with an adjusting rod for adjusting the angle of the first rotating shaft 31, the second support seat 2 is provided with a second rotating shaft 32, the second rotating shaft 32 is provided with a second rotating disc 42, the first rotating shaft 31 and the first rotating disc 41 rotate synchronously, and the second rotating shaft 32 and the second rotating disc 42 rotate synchronously; the bottom plate 5 is arranged between the first rotating disc 41 and the second rotating disc 42, and at least four positioning holes are arranged on the bottom plate.

[0039] The clamping assembly comprises a positioning plate, a gusset plate, and a fixed plate, the fixed plate comprises a first fixed plate and a second fixed plate, the first fixed plate and the second fixed plate combine at least two valve bodies together to form a combination valve body; the gusset plate is one or at least two of a long gusset plate 8, a short gusset plate 9, and a middle gusset plate 11, and is used for supporting the combination valve body to improve the positioning accuracy of the combination valve body; the positioning plate is one or at least two of a long positioning plate 6, a short positioning plate 7, and a middle positioning plate 11, and is arranged on the rear end surface of the combination valve body to improve the positioning accuracy of the combination valve body.

[0040] Embodiment 1

[0041] Please refer to Figures 1 to 5 A new process of machining valve hole of a high-pressure plate valve combination valve comprises the following steps:

[0042] Step one: use a numerical control machine tool to machine the blank hole of the valve body positioning surface into shape;

[0043] Step two: reaming, using the probe to correct the hole center, setting the coordinate system, programming and processing, then reaming the valve body in the 3-axis machining center, leaving a 1mm allowance for the valve hole diameter;

[0044] Step three: reaming, according to the assembly method, tightening the same torque, using a precision reamer with internal cooling hole, internal cooling and external cooling are carried out at the same time; check and adjust the reamer with a micrometer, the radial runout of the cutting edge should not be greater than 0.003;

[0045] Programming and processing, leaving a second allowance for the valve hole diameter, the spindle speed is 1200n / min, the feed rate is 0.8mm, and the load current ratio is less than 15%;

[0046] Step four: assemble the valve, use the first fixed plate 12 and the second fixed plate 13 to assemble the required valve to form a combined valve body, assemble the required valve to form a combined valve body, and uniformly assemble the torque;

[0047] Step five: precision honing, put the assembled combined valve body into the honing workbench simple fixture, use the spacer and positioning plate to improve the positioning accuracy of the combined valve body, use the adjusting rod to adjust the first turntable 1 to the processing angle, and perform honing on the valve hole;

[0048] The first honing uses a first tool with a diameter of 0.015-0.020mm less than the valve hole diameter, the spindle speed is 200n / min, and the feed rate is 20mm / min;

[0049] The second honing uses a second tool with a diameter of 0.005-0.010mm less than the valve hole diameter, the spindle speed is 200n / min, and the feed rate is 20mm / min;

[0050] The third honing uses a third tool with a diameter of 0.003-0.000mm greater than the valve hole diameter, the spindle speed is 200n / min, and the feed rate is 20mm / min.

[0051] Example 2:

[0052] Please refer to Figures 1 to 5 A new process for processing high-pressure valve hole of a combined valve, comprising the following steps:

[0053] Step one: use a numerical control machine tool to process the valve body positioning surface blank hole into a shape;

[0054] Step two: reaming, using the probe to correct the hole center, setting the coordinate system, programming and processing, then reaming the valve body in the 3-axis machining center, leaving a 1mm allowance for the valve hole diameter;

[0055] Step three: reaming, according to the assembly method, tighten the same torque, use precision reamer with internal cooling hole, internal cooling and external cooling are carried out at the same time during processing; check and adjust the tool face of reamer with micrometer, the radial runout of cutting edge should not be greater than 0.003;

[0056] Programming for processing, the valve hole diameter has a second allowance, the speed of the main shaft is 1350n / min, the feed amount is 1mm, and the load current ratio is less than 15%;

[0057] Step four: assemble the valve, use the first fixed plate 12 and the second fixed plate 13 to assemble the required valve to form a combined valve body, assemble the required valve to form a combined valve body, and uniformly assemble the torque;

[0058] Step five: precision honing, put the assembled combined valve body into the honing workbench simple fixture, use the backing plate and positioning plate to improve the positioning accuracy of the combined valve body, use the adjusting rod to adjust the first turntable 1 to the processing angle, and perform honing on the valve hole;

[0059] The first honing uses a first tool with a diameter of 0.015-0.020mm less than the valve hole diameter, the main shaft speed is 300n / min, and the feed amount is 30mm / min;

[0060] The second honing uses a second tool with a diameter of 0.005-0.010mm less than the valve hole diameter, the main shaft speed is 300n / min, and the feed amount is 30mm / min;

[0061] The third honing uses a third tool with a diameter of 0.003-0.000mm greater than the valve hole diameter, the main shaft speed is 300n / min, and the feed amount is 30mm / min.

[0062] Example 3:

[0063] Please refer to Figures 1 to 5 A new process for processing high-pressure valve hole of combined valve, comprising the following steps:

[0064] Step one: use numerical control machine tool to process the valve body positioning surface blank hole into shape;

[0065] Step two: reaming, use probe to correct the hole center, set the coordinate system, program the processing, then ream the valve body in 3-axis machining center, the valve hole diameter has a 2mm allowance;

[0066] Step three: reaming, according to the assembly method, tighten the same torque, use precision reamer with internal cooling hole, internal cooling and external cooling are carried out at the same time during processing; check and adjust the tool face of reamer with micrometer, the radial runout of cutting edge should not be greater than 0.003;

[0067] The machining program is programmed, the valve hole diameter has a second excess amount, the rotating speed of the main shaft is 1500n / min, the feeding amount is 1.2mm, and the load current proportion is less than 15%;

[0068] Step four: assemble the valve, use the first fixed plate 12 and the second fixed plate 13 to assemble the required valve to form a combined valve body, assemble the required valve to form a combined valve body, and uniformly assemble the torque;

[0069] Step five: precision honing, put the assembled combined valve body into the honing workbench simple fixture, use the backing plate and positioning plate to improve the positioning accuracy of the combined valve body, use the adjusting rod to adjust the first turntable 1 to the machining angle, and perform honing on the valve hole;

[0070] The first honing uses a first cutter with a diameter of the valve hole diameter minus 0.015-0.020mm, the main shaft rotating speed is 400n / min, and the feeding amount is 40mm / min;

[0071] The second honing uses a second cutter with a diameter of the valve hole diameter minus 0.005-0.010mm, the main shaft rotating speed is 400n / min, and the feeding amount is 40mm / min;

[0072] The third honing uses a third cutter with a diameter of the valve hole diameter plus 0.003-0.000mm, the main shaft rotating speed is 400n / min, and the feeding amount is 40mm / min.

[0073] The final measurement data size tolerance band of the above embodiment can be guaranteed within 0.002, the hole roughness Ra is within 0.2, and the hole cylindricity is within 0.003, which can effectively solve the technical problems of assembly deformation, roundness, cylindricity, and straightness, reduce the labor intensity of valve body handling, stabilize the positioning, quickly and reliably clamp, guarantee the precision requirements of the valve hole, improve the product quality, and realize no need for alignment, quick hydraulic clamping, and assembly line production, which greatly improves the production efficiency in batch production.

[0074] It should be noted that the machining program is programmed according to the specific size of the produced parts, which is clear to those skilled in the art.

[0075] In the present application, the parts themselves that are not discussed in detail, and the connection methods of the parts in the present application are all known technologies in the technical field. They can be directly applied and will not be described in detail.

[0076] In the present application, the term "a plurality of" refers to two or more, unless otherwise expressly specified. The terms "mounting", "connected", "connecting", "fixed", and the like are to be interpreted broadly, for example, "connected" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0077] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation to the present application.

[0078] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment", and the like, mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0079] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A new process for machining valve holes of high-pressure plate valve combination valves, characterized in that, It comprises the following steps: Step one: use numerical control machine tool to process valve body positioning surface blank hole into shape; Step two: expand hole, use probe to correct hole center, set coordinate system, compile processing program, then expand hole in processing center, valve hole diameter has first excess amount; Step three: reaming, according to assembly mode, hit tight same torque, use precise reamer with inner cooling hole, inner cooling and outer cooling are carried out at the same time during processing; use micrometer to check and adjust each tool face of reamer, radial runout of blade can not be greater than 0.003; Program processing, valve hole diameter has second excess amount, spindle speed is first speed, feed amount is first feed amount, load current proportion is less than 15%; Step four: assemble valve, use first fixed plate and second fixed plate to assemble required valve to form combined valve body, assemble torque is unified; Step five: precise honing, put the assembled combined valve body into honing workbench simple fixture, use pad, positioning plate to improve positioning accuracy of combined valve body, use adjusting rod to adjust first rotating disc to processing angle, carry out honing of valve hole.

2. The new process for machining valve hole of high-pressure plate valve combination valve according to claim 1, characterized in that, The honing of the valve hole is carried out three times; First honing uses first tool with diameter of valve hole diameter minus 0.015-0.020mm, spindle speed is second speed, feed amount is second feed amount; Second honing uses second tool with diameter of valve hole diameter minus 0.005-0.010mm, spindle speed is second speed, feed amount is second feed amount; Third honing uses third tool with diameter of valve hole diameter plus 0.003-0.000mm, spindle speed is second speed, feed amount is second feed amount.

3. The new process for machining valve hole of high-pressure plate valve combination valve according to claim 1, characterized in that, The processing center is 3-axis processing center or 4-axis processing center.

4. The new process for machining valve hole of high-pressure plate valve combination valve according to claim 1, characterized in that, The first excess amount is 1-2mm.

5. The new process for machining valve hole of high-pressure plate valve combination valve according to claim 1, characterized in that, The second excess amount is 0.05-0.08mm.

6. The new process for machining valve hole of high-pressure plate valve combination valve according to claim 1, characterized in that, The first speed is 1200-1500n / min, the first feed amount is 0.8-1.2mm / n.

7. The new process for machining valve hole of high-pressure plate valve combination valve according to claim 2, characterized in that, The second speed is 200-400n / min, the second feed amount is 20-40mm / min.

8. A special fixture for machining valve hole of high-pressure plate valve combination valve, characterized in that, It comprises first support seat, second support seat, bottom plate, clamping assembly; The first support seat is provided with first rotating shaft, the first rotating shaft is provided with first rotating disc, the first support seat is provided with adjusting rod for adjusting angle of first rotating shaft; The second support seat is provided with second rotating shaft, the second rotating shaft is provided with second rotating disc; the first rotating shaft and the first rotating disc rotate synchronously, the second rotating shaft and the second rotating disc rotate synchronously; The bottom plate is arranged between the first rotating disc and the second rotating disc, and at least four positioning holes are arranged on the bottom plate; The clamping assembly comprises positioning plate, pad and fixed plate; The fixed plate comprises first fixed plate and second fixed plate, and the first fixed plate and the second fixed plate combine at least two valve bodies to form combined valve body; The pad is one of long pad, short pad and middle pad, or at least two combinations, and the pad is used for supporting the combined valve body; the bolt passes through the positioning hole, the pad and the combined valve body bottom pre-installed hole to be connected. The positioning plate is one or at least two of a long positioning plate, a short positioning plate, and a middle positioning plate, and the positioning plate is arranged on the rear end surface of the combined valve body.

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