Honing tool, oilstone rounding method and precise hole honing machining method

Abstract

The invention discloses a honing tool, an oilstone rounding method and a precise hole honing method, the honing tool comprises a honing execution unit, the honing execution unit comprises a honing head, a plurality of oilstones installed on the honing head, and a feeding mechanism driving the oilstones to be synchronously fed in the radial direction of the honing head; the size detection unit comprises a plug gauge and a plug gauge seat, and the plug gauge is installed at the front end of the plug gauge seat and used for detecting the hole diameter of the workpiece in real time in the honing process; the plug gauge is provided with a detection part, the outer peripheral surface of the detection part is formed by alternately connecting N convex spherical surfaces and N planes, and the cross section of the detection part is a rounded polygon; wherein N is a positive integer not less than 2. According to the scheme, stable point or small area contact with the hole wall can be adaptively formed by arranging the convex spherical surface, so that the problem of interference or clamping stagnation caused by axis deflection is solved, and the reliability of real-time size detection and the accuracy of a measurement result under a complex working condition are remarkably improved.

Description

Technical Field

[0001] This application generally relates to the field of mechanical manufacturing technology. More specifically, this application relates to a honing tool; further, this application also relates to a method for rounding an oilstone for honing a tool; further still, this application also relates to a method for precision hole honing. Background Technology

[0002] In existing technologies, the honing of internal holes in high-hardness parts with diameter accuracy requirements at the micrometer level generally faces the following technical bottlenecks: First, hole diameter detection during the machining process usually relies on offline measurement after machining. This lag feedback cannot guide the machining process in real time, easily leading to dimensional deviations or requiring multiple reworks, severely restricting machining efficiency and first-pass yield. Second, although attempts have been made to integrate contact probes near the tool to achieve online detection, traditional probes (such as cylindrical plug gauges or point contact probes) are extremely sensitive to the alignment accuracy between the tool and the workpiece hole axis. Under actual high-speed honing conditions, unavoidable minor vibrations and misalignments can lead to inaccurate measurement signals, probe wear, or even damage, making it difficult to guarantee the stability and reliability of the detection. Furthermore, existing online detection solutions are often complex in structure and cumbersome in operation, making it difficult to seamlessly integrate with the honing action to achieve true closed-loop automatic control, thus limiting their efficient application in automated production lines.

[0003] In view of this, there is an urgent need to provide a honing tool, an oilstone rounding method, and a precision hole honing machining method to improve the reliability of workpiece size detection. Summary of the Invention

[0004] In order to at least solve one or more of the technical problems mentioned above, this application proposes a honing tool, an oilstone rounding method, and a precision hole honing processing method in several aspects to improve the reliability of workpiece size detection.

[0005] In a first aspect, this application provides a honing tool, comprising: a honing execution unit including a honing head, multiple oilstones mounted on the honing head, and a feed mechanism for driving the oilstones to feed synchronously along the radial direction of the honing head; and a dimension detection unit including a plug gauge and a plug gauge seat, the plug gauge being mounted on the front end of the plug gauge seat for real-time detection of the workpiece hole diameter during honing; the plug gauge having a detection part, the outer peripheral surface of the detection part being composed of N convex spherical surfaces and N planes alternately connected, and its cross-section being a rounded polygon; wherein, N is a positive integer not less than 2.

[0006] In some embodiments, the outer peripheral surface of the detection unit is composed of six concentric convex spherical surfaces and six planes alternately connected, and its cross-section is a rounded hexagon.

[0007] In some embodiments, the plug gauge has at least two circumferentially spaced first connecting portions on the side near the plug gauge seat, the first connecting portions extending axially and having a first groove on their outer periphery; the plug gauge seat has at least two second connecting portions that are staggered and correspond to the first connecting portions on the side near the plug gauge, and the outer periphery of the second connecting portions has a second groove; when the plug gauge and the plug gauge seat are in an assembled state, the first groove and the second groove are aligned and together form a complete annular groove, and the wire retaining ring is engaged in the annular groove.

[0008] In some embodiments, the feeding mechanism includes: a push rod movably disposed axially; a feed cone connected to the push rod and having an outer conical surface; and a plurality of oilstone seats, each of the oilstone seats for mounting one oilstone, and having an inclined surface on its side facing away from the oilstone that matches the outer conical surface of the feed cone; wherein, the axial movement of the push rod drives the feed cone to move axially, and the axial movement is converted into the radial movement of the oilstone seat through the cooperation of the outer conical surface and the inclined surface, thereby driving the oilstone to be radially fed or reset.

[0009] In some embodiments, a return spring and a retaining ring are further included; a retaining groove is provided on the push rod, and the retaining ring is installed in the retaining groove; the return spring is sleeved on the push rod, with one end abutting against the retaining ring and the other end abutting against the plug gauge seat, for providing axial elastic force for the push rod and the feed cone to return.

[0010] In some embodiments, the honing head is provided with a plurality of radially extending guide grooves evenly distributed along the circumference, and the honing stone seat is slidably disposed in the guide grooves; the honing head is provided with an axial through hole at its center, and the feed cone is slidably disposed in the axial through hole.

[0011] In some embodiments, the oilstone seat has grooves at both ends along its sliding direction, and a circular spring sealing ring is installed in each groove; the circular spring sealing ring is configured to provide elastic restoring force when the feed cone moves in the reverse direction and removes the radial thrust on the oilstone seat, thereby driving the oilstone seat and the oilstone to radially reset.

[0012] In some embodiments, the plug gauge seat has a first cylindrical section and a second cylindrical section coaxially connected and having different outer diameters, and the first cylindrical section has a stepped portion inside; the honing tool further includes a flange handle, the flange handle has a hollow structure for accommodating a push rod, and its end is provided with a threaded boss; when the flange handle and the plug gauge seat are in an assembled state, the plug gauge seat is sleeved on the flange handle, the threaded boss is screwed into the honing head, the end face of the threaded boss abuts against the end face of the honing head, and axially limits the stepped portion.

[0013] In some embodiments, the size detection unit further includes an adjustable limit trigger mechanism; the adjustable limit trigger mechanism includes: a tray, which is threadedly sleeved on the outside of the plug gauge seat to set the end point of the travel of the plug gauge trigger detection signal; and a locking nut, which is threadedly connected to the plug gauge seat and located above the tray, for locking and fixing the tray after adjustment.

[0014] In some embodiments, a rounding plug is also included; the rounding plug is detachably connected to the flange tool holder and is configured to push the push rod by simulating machining feed action, causing the honing stone to expand to a rounded state, thereby providing conditions for the overall outer diameter grinding of the honing tool to be rounded.

[0015] In a second aspect, this application provides a method for rounding honing stones for the aforementioned honing tool, comprising the following steps: installing a rounding drive: assembling the rounding plug into the flange tool holder and abutting against the push rod, causing it to push the push rod to move axially, thereby causing all honing stones to expand radially to a rounded state; overall positioning: clamping the honing tool in the expanded honing stone state onto an external cylindrical grinding machine, and positioning it using preset positioning references at both ends of the honing tool; overall grinding: starting the external cylindrical grinding machine and performing overall grinding on the outer circumferential surface of the honing stones until the outer diameter of all honing stones is consistent and the total runout reaches the set accuracy requirement; disassembly and reset: removing the rounding plug, causing the honing stones to radially retract and reset under the action of the reset mechanism.

[0016] In some embodiments, in the overall positioning step, a double-center positioning is used, wherein the first center abuts against the center hole at the end of the flange tool holder, and the second center abuts against the center hole at the front end of the feed cone.

[0017] In a third aspect, this application provides a precision hole honing method using the aforementioned honing tool, comprising the following steps: synchronous processing and detection: driving the honing tool to rotate and feed axially, while simultaneously driving the honing stone radially via the feed mechanism to hone the inner hole of the workpiece; during this process, the plug gauge moves with the tool and performs real-time contact detection of the hole diameter; signal triggering and judgment: when the inner hole of the workpiece is honed to the target size, the plug gauge falls into the hole to a depth set by the tray under its own weight and axial feed, triggering a position detection signal; closed-loop control response: based on the position detection signal, the control system controls the honing tool to stop radial feed and processing at the current station.

[0018] Using the honing tool provided above, this embodiment of the application employs a plug gauge detection section composed of N convex spherical surfaces and N flat surfaces alternately connected. This structure allows the plug gauge to exhibit excellent tolerance for unavoidable minor alignment errors or misalignments between the tool axis and the workpiece hole axis during inspection. In other words, the convex spherical surfaces can adaptively form stable point or small-area contact with the hole wall, thereby overcoming interference or jamming problems caused by axis misalignment. This characteristic ensures that even under high-speed, dynamic machining conditions, the inspection operation can still be performed normally and smoothly, and the inspection signal can accurately reflect the actual size of the hole diameter. Attached Figure Description

[0019] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein:

[0020] Figure 1 An exploded view of a honing tool according to an embodiment of this application is shown; Figure 2 It shows Figure 1 A cross-sectional view of the honing tool in the assembly state along the AA direction; Figure 3 This diagram shows a plug gauge and plug gauge seat in an assembled state according to an embodiment of this application; Figure 4 A top view of a plug gauge according to an embodiment of this application is shown; Figure 5 This diagram shows a honing tool in a rounded state according to an embodiment of this application. Figure 6 The diagram shows the changing states of the honing tool during processing according to an embodiment of this application.

[0021] In the diagram: 100, honing tool; 200, workpiece; 101. Plug gauge; 1011. Inspection section; 1011-1. Outer convex spherical surface; 1011-2. Flat surface; 1012. First connecting part; 102. Plug gauge seat; 1021. First cylindrical section; 1022. Second cylindrical section; 1023. Second connecting part; 1024. Stepped part; 103. Wire retaining ring; 1031. Notch; 104. Probe; 105. Tray; 106. Locking nut; 107. Flange handle; 1071. Boss; 108. Honing head; 109. Oilstone seat; 1091. Inclined surface; 110. Oilstone; 111. Feed cone; 112. Push rod; 113. Spring; 114. Snap ring; 115. Spring sealing ring; 116. Plug; 117. Center; 118. Grinding wheel. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0025] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0026] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0027] like Figure 1 , Figure 3 and Figure 4As shown, in some embodiments, this application provides a honing tool 100, including: a honing execution unit comprising a honing head 108, multiple honing stones 110 mounted on the honing head 108, and a feed mechanism for driving the honing stones 110 to feed synchronously along the radial direction of the honing head 108; and a dimension detection unit comprising a plug gauge 101 and a plug gauge seat 102, the plug gauge 101 being mounted at the front end of the plug gauge seat 102 for real-time detection of the hole diameter of the workpiece 200 during the honing process; the plug gauge 101 having a detection part 1011, the outer peripheral surface of the detection part 1011 being formed by N convex spherical surfaces 1011-1 and N planes 1011-2 alternately connected, and its cross-section being a rounded polygon; wherein, N is a positive integer not less than 2.

[0028] In this application, a honing tool 100 is provided, which mainly consists of a honing execution unit and a dimensional detection unit. Specifically, the honing execution unit includes a honing head 108, multiple honing stones 110 mounted thereon, and a feed mechanism that drives these honing stones 110 to synchronously and precisely feed radially along the honing head 108. This feed mechanism can control the expansion and contraction of the outer diameter of the honing stones 110 according to machining instructions, thereby efficiently honing internal holes with high hardness and high precision requirements.

[0029] The dimensional inspection unit is tightly integrated above the honing head 108, and includes a plug gauge 101 for direct contact measurement and a plug gauge seat 102 for mounting the plug gauge 101. The outer circumferential surface of the inspection part 1011 of the plug gauge 101 is formed by N convex spherical surfaces 1011-1 and N planes 1011-2 alternately connected along the circumferential direction (N is a positive integer not less than 2), so that the cross-section of the inspection part 1011 presents a rounded polygonal structure. The core principle of this geometric design is that multiple convex spherical surfaces 1011-1 constitute the main inspection contact surface.

[0030] When the plug gauge 101 attempts to enter the machined hole, even if there is a slight angular deviation between the axis of the plug gauge 101 and the axis of the hole in the workpiece 200 due to machine tool vibration, clamping errors, or misalignment of the workpiece 200, the spherical contact characteristics ensure that at least a portion of the spherical area forms a stable and reliable contact with the hole wall, unlike traditional cylindrical plug gauges 101 which may experience jamming or measurement inaccuracies due to edge contact. Furthermore, the alternating planes 1011-2 help guide the flow of cutting fluid and remove micro-chips during the inspection process, and provide auxiliary guidance at specific angles, further enhancing the stability of the inspection process.

[0031] like Figure 6As shown, during honing, the plug gauge 101 is held above the workpiece 200, and as machining progresses, it continuously attempts to fall into the machined hole. When the diameter of the hole in the workpiece 200 is machined to the target size range, the plug gauge 101, guided by its spherical structure, smoothly falls to the set depth. This action generates a confirmation signal. This confirmation signal can be immediately fed back to the machine tool's CNC system, thereby automatically stopping the radial feed of the current station or proceeding to the next machining step, realizing a fully closed-loop automated operation from machining to inspection to control.

[0032] The solution presented in this application employs a plug gauge 101 detection unit 1011, which is composed of N convex spherical surfaces 1011-1 and N flat surfaces 1011-2 alternately connected. This structure allows the plug gauge 101 to exhibit excellent tolerance for unavoidable minor alignment errors or misalignments between the tool axis and the workpiece 200 hole axis during inspection. The principle lies in the fact that the convex spherical surfaces 1011-1 can adaptively form stable point or small-area contact with the hole wall, thereby overcoming interference or jamming problems caused by axis misalignment. This characteristic ensures that the inspection action can still be performed normally and smoothly even under high-speed, dynamic machining conditions, and the inspection signal can accurately reflect the actual size of the hole diameter. Therefore, this solution significantly improves the reliability of real-time dimensional inspection and the accuracy of measurement results under complex working conditions.

[0033] like Figure 4 As shown, in a specific embodiment, the outer peripheral surface of the detection unit 1011 is composed of six concentric convex spherical surfaces 1011-1 and six planes 1011-2 connected alternately, and its cross-section is a rounded hexagon.

[0034] In this application, the outer peripheral surface of the detection section 1011 of the plug gauge 101 is composed of six concentric convex spherical surfaces 1011-1 and six planes 1011-2 alternately connected, resulting in a rounded hexagonal cross-section. During the inspection process, when there is an unavoidable slight misalignment between the plug gauge 101 and the axis of the workpiece 200 hole, the convex spherical surface 1011-1 can first form a stable point or small area contact with the hole wall. Based on the adaptive characteristics of spherical contact, the plug gauge 101 can effectively compensate for slight deviations between axes, thus smoothly sliding into the hole when the hole diameter is qualified, avoiding jamming, surface damage, or signal misjudgment caused by misalignment. Therefore, this rounded hexagonal cross-section design, especially the arrangement of its concentric convex spherical surfaces 1011-1, significantly improves the tolerance of the inspection action to axis misalignment, thereby enhancing the reliability and accuracy of online real-time inspection.

[0035] It is worth noting that this solution does not limit the number of the convex spherical surface 1011-1 and the flat surface 1011-2 of the detection part 1011 of the plug gauge 101. That is to say, in addition to the six mentioned above, there can be other numbers.

[0036] like Figure 1 and Figure 3 As shown, in a specific embodiment, the plug gauge 101 has at least two circumferentially spaced first connecting portions 1012 on the side near the plug gauge seat 102. Each first connecting portion 1012 extends axially and has a first groove on its outer periphery. The plug gauge seat 102 has at least two second connecting portions 1023 on the side near the plug gauge 101, which are staggered and correspond to the first connecting portions 1012. Each second connecting portion 1023 has a second groove on its outer periphery. When the plug gauge 101 and the plug gauge seat 102 are in an assembled state, the first and second grooves are aligned and together form a complete annular groove, and the wire retaining ring 103 is engaged within the annular groove. It is worth noting that the wire retaining ring 103 in this embodiment has a notch 1031.

[0037] In this application, a mechanical connection structure is adopted between the plug gauge 101 and the plug gauge seat 102 to facilitate quick disassembly and assembly and serial replacement. Specifically, on the side of the plug gauge 101 near the plug gauge seat 102, at least two first connecting portions 1012 are provided, evenly spaced circumferentially. These first connecting portions 1012 extend axially, and a first groove is machined on their outer circumferential surface. Correspondingly, on the side of the plug gauge seat 102 near the plug gauge 101, at least two second connecting portions 1023 are provided, the same number as the first connecting portions 1012, and staggered. A second groove is machined on the outer circumferential surface of the second connecting portions 1023.

[0038] When the plug gauge 101 and the plug gauge seat 102 are assembled, their connecting parts interlock and fit together, so that the first groove and the second groove are accurately aligned radially, forming a continuous annular groove. A flexible steel wire retaining ring 103 is inserted into the annular groove, and its own clamping force reliably locks the plug gauge 101 and the plug gauge seat 102 together axially, thereby achieving a stable connection between the two.

[0039] In this solution, the plug gauge 101 and the plug gauge seat 102 are fixed by a steel wire retaining ring 103. While ensuring the rigidity and accuracy of the connection, the plug gauge 101 can be quickly replaced, which provides convenience for serial production to adapt to different hole diameters.

[0040] like Figure 1 and Figure 2As shown, in a specific embodiment, the feeding mechanism includes: a push rod 112, which is axially movable; a feed cone 111, which is connected to the push rod 112 and has an outer conical surface; and a plurality of whetstone seats 109, each whetstone seat 109 for mounting a whetstone 110, and having an inclined surface 1091 on its side facing away from the whetstone 110 that is adapted to the outer conical surface of the feed cone 111; wherein, the axial movement of the push rod 112 drives the feed cone 111 to move axially, and through the cooperation of the outer conical surface and the inclined surface 1091, the axial movement is converted into the radial movement of the whetstone seat 109, thereby driving the whetstone 110 to be radially fed or reset.

[0041] In this application, the feeding mechanism includes a push rod 112, a feed cone 111, and multiple honing stone seats 109. The push rod 112 is axially movable. The feed cone 111 is threadedly connected to the push rod 112, and its outer surface forms an outer conical surface. Each honing stone seat 109 is used to mount a honing stone 110, and its side facing away from the honing stone 110 is machined with an inclined surface 1091 that matches the outer conical surface of the feed cone 111. The axial movement of the push rod 112 drives the feed cone 111 connected to it to move axially synchronously. When the feed cone 111 moves, its outer conical surface slides against the inclined surface 1091 of each honing stone seat 109, thereby converting the axial linear movement of the feed cone 111 into the radial linear movement of each honing stone seat 109 along the honing head 108, thereby driving the honing stone 110 mounted on the honing stone seat 109 to achieve radial feed expansion or contraction and reset.

[0042] In one specific implementation, a return spring 113 and a retaining ring 114 are also included; a retaining groove is provided on the push rod 112, and the retaining ring 114 is installed in the retaining groove; the return spring 113 is sleeved on the push rod 112, one end of which abuts against the retaining ring 114, and the other end abuts against the plug gauge seat 102, for providing axial elastic force for the push rod 112 and the feed cone 111 to return.

[0043] In this application, the honing tool 100 also includes a reset assembly, which comprises a reset spring 113 and a retaining ring 114. An annular groove is machined into the shaft of the push rod 112, and the retaining ring 114 is fitted into this groove. The reset spring 113 is sleeved on the outside of the push rod 112, with one end abutting against the retaining ring 114 and the other end abutting against the plug gauge seat 102. This reset assembly constitutes an automatic reset mechanism for the push rod 112 and the feed cone 111. During machining, when the push rod 112 is pushed and drives the feed cone 111 to move axially to achieve radial feeding of the honing stone 110, the reset spring 113 stores elastic potential energy due to compression. When the machining operation ends, this elastic potential energy is released, providing a reverse, stable axial reset force to the push rod 112 and the feed cone 111, driving them to accurately return to their initial position, thereby ensuring that the honing stone 110 can reliably retract and reset radially. The reset component provided in this solution ensures the stable and consistent state of the tool after each machining cycle, providing a foundation for continuous and precise honing operations.

[0044] In one specific implementation, the honing head 108 is provided with a plurality of radially extending guide grooves evenly distributed along the circumference, and the honing stone seat 109 is slidably disposed in the guide grooves; the honing head 108 is provided with an axial through hole at its center, and the feed cone 111 is slidably disposed in the axial through hole.

[0045] In this application, the honing head 108 has multiple radially extending guide grooves evenly distributed along its circumference. These guide grooves provide precise tracks for the installation and movement of the honing stone seats 109. The honing stone seats 109 are slidably disposed within the corresponding guide grooves. Simultaneously, an axial through hole is provided through the center of the honing head 108, and the feed cone 111 is axially slidably fitted into this axial through hole. This arrangement allows the axial linear motion of the feed cone 111 to be accurately converted into the radial linear motion of each honing stone seat 109 along the guide grooves through the conical surface fit, thereby driving the honing stones 110 to achieve precise and synchronous radial feed or reset. Furthermore, the evenly distributed guide grooves combined with the centrally located axial through hole form a rigid and precisely guided motion transmission core, ensuring that multiple honing stones 110 are subjected to uniform force and move in unison during processing.

[0046] In one specific implementation, the oilstone seat 109 has grooves at both ends along its sliding direction, and a circular spring seal ring 115 is installed in each groove; the circular spring seal ring 115 is configured such that when the feed cone 111 moves in the opposite direction and removes the radial thrust on the oilstone seat 109, the circular spring seal ring 115 provides an elastic restoring force to drive the oilstone seat 109 and the oilstone 110 to radially reset.

[0047] In this application, a groove is provided at each end of the oilstone seat 109 along its sliding direction. A circular spring sealing ring 115 is installed in each groove. The circular spring sealing ring 115 is designed to have both sealing and elastic restoring functions. When the feed cone 111 is driven to move forward, its conical surface pushes the oilstone seat 109 to move radially outward to achieve machining feed, the spring sealing ring 115 undergoes elastic deformation. When machining is completed, the feed cone 111 moves in the opposite direction and removes the radial thrust on the oilstone seat 109. The circular spring sealing ring 115, relying on its own stored elastic restoring force, can actively and smoothly drive the oilstone seat 109, together with the oilstone 110 on it, to slide radially inward, accurately restoring it to its initial position.

[0048] The circular spring seal 115 provided in this solution not only provides a reliable automatic reset mechanism for the radial movement of the oilstone 110, ensuring the consistency of the machining cycle, but its sealing characteristics also help prevent grinding impurities from entering the moving parts, thereby improving the reliability and service life of the tool.

[0049] like Figure 3 and Figure 6 As shown, in a specific embodiment, the plug gauge seat 102 has a first cylindrical section 1021 and a second cylindrical section 1022 that are coaxially connected and have different outer diameters. The first cylindrical section has a stepped portion 1024 inside. The honing tool 100 also includes a flange handle 107, which has a hollow structure for accommodating the push rod 112 and a threaded boss 1071 at its end. When the flange handle 107 and the plug gauge seat 102 are in the assembled state, the plug gauge seat 102 is sleeved on the flange handle, and the threaded boss 1071 is screwed into the honing head 108. The end face of the threaded boss abuts against the end face of the honing head 108 and axially limits the stepped portion 1024.

[0050] In this application, the plug gauge seat 102 adopts a two-section cylindrical structure with coaxial connection but different outer diameters, including a first cylindrical section 1021 and a second cylindrical section 1022. An inwardly stepped portion 1024 is machined on the inner wall of the first cylindrical section 1021. The honing tool 100 also includes a flange tool holder 107, which has a hollow structure for through which the push rod 112 is installed, and a threaded boss 1071 is formed at its end facing the plug gauge seat 102.

[0051] When the flange tool holder 107 is assembled with the plug gauge seat 102, the plug gauge seat 102 is fitted over the flange tool holder, and the threaded boss 1071 is screwed into the honing head 108. The end face of the threaded boss abuts against the end face of the honing head 108, and forms an axial limit on the stepped portion 1024 of the inner wall of the first cylindrical section 1021. The structure of the stepped portion 1024, the flange tool holder 107, and the honing head 108 provides precise axial positioning and hard limiting for the entire dimensional inspection unit, preventing axial movement due to vibration or its own weight during honing. This ensures the long-term stability and repeatability of the axial position of the inspection unit relative to the honing execution unit, laying an important mechanical foundation for the reliability of real-time dimensional inspection.

[0052] It should be noted that this solution does not limit the number of bosses 1071. The two bosses 1071 shown in the figure are only an illustration of a specific embodiment. In practical applications, other numbers of bosses 1071 can be used according to structural requirements.

[0053] In one specific implementation, the dimension detection unit further includes an adjustable limit trigger mechanism; the adjustable limit trigger mechanism includes: a tray 105, which is threadedly connected to the outside of the plug gauge seat 102 for setting the end point of the travel of the plug gauge 101 trigger detection signal; and a locking nut 106, which is threadedly connected to the plug gauge seat 102 and located above the tray 105 for locking the tray 105 after adjustment.

[0054] In this application, the dimensional detection unit further includes an adjustable limit trigger mechanism, which consists of a tray 105 and a locking nut 106. The tray 105 is threadedly fitted onto the outside of the plug gauge seat (specifically the second cylindrical section). By rotating the tray 105, its axial position can be changed, thereby setting the end point of the travel of the plug gauge 101's trigger signal during the detection process. The locking nut 106 is threadedly connected to the plug gauge seat 102 and located above the tray 105. After the position of the tray 105 is adjusted, it is locked and fixed to prevent displacement during processing.

[0055] During actual operation, the probe 104 or displacement sensor equipped on the machine tool monitors the position of the tray 105 in real time. When the workpiece 200 hole diameter reaches the target size during honing, the plug gauge 101 falls into the hole, driving the plug gauge seat 102 and the tray 105 to move axially to the preset trigger position. The probe 104 then detects this position change and sends a signal. This signal is transmitted to the machine tool control system to immediately stop the feed at the current station, thereby realizing closed-loop automatic control of machining and inspection. The adjustable limit trigger mechanism provided in this solution not only ensures the accuracy and reliable triggering of the detection signal, but its adjustable characteristics also allow the tool to flexibly adapt to the machining needs of workpieces 200 of different depths or specifications.

[0056] like Figure 5 As shown, in one specific embodiment, a rounding plug 116 is also included; the rounding plug 116 is detachably connected to the flange tool holder 107 and is configured to push the push rod 112 by simulating machining feed action, so that the honing stone 110 expands to a rounded state, thereby providing conditions for the overall external cylindrical grinding of the honing tool 100 to be rounded.

[0057] In this application, the honing tool 100 is also equipped with a rounding plug 116. This plug 116 is detachably connected to the tail of the flange tool holder 107. Its function is as follows: when screwed in, the plug 116 simulates the feed action during actual machining, pushing the push rod 112 forward, which in turn drives all the honing stones 110 to synchronously expand radially to a pre-set, uniform outer diameter position via the feed cone 111; this state is called the rounding state. This allows the entire outer diameter of the honing tool 100 (i.e., the outer surface of all the honing stones) to be treated as a complete cylindrical surface for subsequent grinding and finishing.

[0058] With this solution, when performing a rounding operation on a newly replaced or worn oilstone 110, it is not necessary to remove the oilstone 110 from the tool or rely on a special external rounding fixture. High-precision overall grinding can be completed directly on a general-purpose cylindrical grinding machine, effectively avoiding errors introduced by repeated disassembly and assembly, and significantly improving rounding accuracy, ease of operation and tool maintenance efficiency.

[0059] like Figure 5 As shown, in some embodiments, this application provides a method for rounding honing stones for the above-mentioned honing tool, including the following steps: Installing a rounding drive: assembling a rounding plug 116 into the flange tool holder 107 and abutting against the push rod 112, causing it to push the push rod 112 to move axially, thereby causing all honing stones 110 to expand radially to a rounded state; Overall positioning: clamping the honing tool 100 in the expanded state of the honing stones 110 onto an external cylindrical grinding machine, and positioning it according to the preset positioning references at both ends of the honing tool 100; Overall grinding: starting the external cylindrical grinding machine and performing overall grinding on the outer circumferential surface of the honing stones 110 until the outer diameter of all honing stones 110 is consistent and the total runout reaches the set accuracy requirement; Disassembly and reset: removing the rounding plug 116, causing the honing stones 110 to radially retract and reset under the action of the reset mechanism. In the overall positioning process, a double center 117 is used for positioning, wherein the first center 117 is held in the center hole at the end of the flange tool holder 107, and the second center 117 is held in the center hole at the front end of the feed cone 111.

[0060] This application provides a method for rounding honing stones specifically for the aforementioned honing tool. The method first involves installing the rounding drive: a rounding plug 116 is fitted to the tail of the flange tool holder 107 and abuts against the end of the push rod 112; the plug 116 is screwed in to push the push rod 112 axially, thereby driving all honing stones 110 to synchronously expand radially to a uniform predetermined outer diameter position via the feed cone 111, thus entering the rounding preparation state. Subsequently, overall positioning is performed: the honing tool 100, in the expanded honing stone state, is clamped onto an external cylindrical grinding machine using a double-center 117 positioning method. The first center 117 abuts against the center hole at the end of the flange tool holder 107, and the second center 117 abuts against the center hole at the front end of the feed cone 111, thereby ensuring precise alignment of the tool's rotation axis with the grinding machine spindle axis. Next, perform overall grinding: Start the cylindrical grinding machine and perform synchronous, overall grinding on the outer circumferential surface of the oilstones 110 in the expanded state until the outer diameter of all oilstones 110 is consistent and the total runout accuracy of their outer surfaces meets the set requirements. Finally, disassemble and reset: Remove the rounding plug 116, and the push rod 112 and feed cone 111 retract axially under the action of the return spring 113. The oilstones 110 then retract radially under the elastic restoring force of the circular spring seal ring 115, returning to the initial machining state.

[0061] It is worth noting that precision dressing is required in conjunction with the grinding wheel 118. After the honing stones 110 are pushed and radially expanded to the set position by the rounding plug 116, the outer surfaces of multiple honing stones 110 together form a combined cylindrical surface with a size slightly larger than the target value and an irregular shape. At this time, by rotating and grinding it with the grinding wheel 118, excess material on the surface of each honing stone 110 can be gradually removed, thereby uniformly grinding its outer diameter to the required precise value, and simultaneously correcting its roundness, cylindricity and other geometric accuracy, thus establishing a precise and regular starting reference surface for subsequent honing.

[0062] The oilstone rounding method provided in this application utilizes the tool's own structure to achieve rounding preparation and completes the overall grinding in one clamping, which has the characteristics of high precision, simple operation and outstanding efficiency.

[0063] In some embodiments, this application provides a precision hole honing method using the aforementioned honing tool 100, comprising the following steps: synchronous processing and inspection: driving the honing tool 100 to rotate and feed axially, while simultaneously driving the honing stone 110 to feed radially through the feed mechanism to hone the inner hole of the workpiece 200. During this process, the plug gauge 101 moves with the tool and performs real-time contact detection of the hole diameter; signal triggering and judgment: when the inner hole of the workpiece 200 is honed to the target size, the plug gauge 101 falls into the hole to the depth set by the tray 105 under its own weight and axial feed, triggering a position detection signal; closed-loop control response: based on the position detection signal, the control system controls the honing tool 100 to stop radial feeding and processing at the current station.

[0064] In this application, the precision hole honing method based on the aforementioned honing tool 100 first performs a synchronous processing and inspection step: the honing tool 100 is driven to rotate and feed along the axial direction of the workpiece 200, while the honing stone 110 is driven to expand radially through its internal feed mechanism to hone the inner hole of the workpiece 200. During this process, the plug gauge 101 installed at the front end of the tool moves with the tool and continuously performs real-time, in-situ contact detection of the changing hole diameter. Then, a signal triggering and judgment step is performed: as honing progresses, when the inner hole size is processed to a preset target value, the plug gauge 101, aided by its own weight and the axial feed of the tool, falls completely into the hole of the workpiece 200 until it reaches the axial depth preset by the adjustable tray 105. At this time, the probe 104 associated with this depth position is triggered, generating a position detection signal indicating that the hole diameter is qualified.

[0065] Finally, the closed-loop control response step is executed: the position detection signal is transmitted to the machine tool CNC system in real time, and the control system then issues a command to control the honing tool 100 to immediately stop the radial feed motion at the current machining position, usually accompanied by spindle reset, thereby automatically and accurately terminating the machining at this station.

[0066] The precision hole honing method provided in this application realizes a fully closed-loop intelligent control from machining and real-time detection to automatic shutdown, which effectively ensures the consistency of hole diameter machining dimensions and significantly improves production efficiency and process reliability.

[0067] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A honing tool (100), characterized in that, include: A honing execution unit includes a honing head (108), a plurality of honing stones (110) mounted on the honing head (108), and a feeding mechanism that drives the honing stones (110) to feed synchronously along the radial direction of the honing head (108). as well as The dimension detection unit includes a plug gauge (101) and a plug gauge seat (102). The plug gauge (101) is installed at the front end of the plug gauge seat (102) and is used to detect the hole diameter of the workpiece (200) in real time during honing. The plug gauge (101) has a detection part (1011). The outer peripheral surface of the detection part (1011) is composed of N convex spherical surfaces (1011-1) and N planes (1011-2) connected alternately, and its cross-section is a rounded polygon. Wherein, N is a positive integer not less than 2.

2. The honing tool (100) according to claim 1, characterized in that, The outer peripheral surface of the detection unit (1011) is composed of six concentric convex spherical surfaces (1011-1) and six planes (1011-2) connected alternately, and its cross-section is a rounded hexagon.

3. The honing tool (100) according to claim 1, characterized in that, The plug gauge (101) has at least two circumferentially spaced first connecting portions (1012) on the side near the plug gauge seat (102), the first connecting portions (1012) extending axially and having a first groove on their outer periphery; The plug gauge seat (102) has at least two second connecting portions (1023) on the side near the plug gauge (101) that are staggered and correspond to the first connecting portion (1012), and the outer periphery of the second connecting portion (1023) has a second groove; When the plug gauge (101) and the plug gauge seat (102) are in the assembled state, the first groove and the second groove are aligned and together form a complete annular groove, and the wire retaining ring (103) is stuck in the annular groove.

4. The honing tool (100) according to claim 3, characterized in that, The feeding mechanism includes: A push rod (112) is movably mounted along the axial direction; The feed cone (111) is connected to the push rod (112) and has an outer conical surface; Multiple oilstone holders (109), each of the oilstone holders (109) is used to mount one of the oilstones (110), and its side facing away from the oilstone (110) is provided with an inclined surface (1091) that is adapted to the outer conical surface of the feed cone (111). The axial movement of the push rod (112) drives the feed cone (111) to move axially. Through the cooperation between the outer cone surface and the inclined surface (1091), the axial movement is converted into the radial movement of the oilstone seat (109), thereby driving the oilstone (110) to feed radially or reset.

5. The honing tool (100) according to claim 4, characterized in that, It also includes a return spring (113) and a retaining ring (114). The top rod (112) is provided with a groove, and the retaining spring (114) is installed in the groove; The return spring (113) is sleeved on the push rod (112), with one end abutting against the snap ring (114) and the other end abutting against the plug gauge seat (102), and is used to provide axial elastic force for the return of the push rod (112) and the feed cone (111).

6. The honing tool (100) according to claim 5, characterized in that, The honing head (108) has a plurality of radially extending guide grooves evenly distributed along the circumference, and the oilstone seat (109) is slidably disposed in the guide grooves; The honing head (108) has an axial through hole at its center, and the feed cone (111) is axially slidably disposed in the axial through hole.

7. The honing tool (100) according to any one of claims 4-6, characterized in that, The oilstone base (109) has grooves at both ends along its sliding direction, and a circular spring sealing ring (115) is installed in each groove. The circular spring seal (115) is configured to provide an elastic restoring force when the feed cone (111) moves in the reverse direction to remove the radial thrust on the oilstone seat (109), thereby driving the oilstone seat (109) and the oilstone (110) to radially reset.

8. The honing tool (100) according to claim 7, characterized in that, The plug gauge seat (102) has a first cylindrical section (1021) and a second cylindrical section (1022) that are coaxially connected and have different outer diameters. The first cylindrical section has a stepped portion (1024) inside. The honing tool (100) also includes a flange handle (107), which has a hollow structure for accommodating a push rod (112) and a threaded boss (1071) at its end. When the flange handle (107) and the plug gauge seat (102) are in the assembled state, the plug gauge seat (102) is sleeved on the flange handle (107), and the threaded boss (1071) is screwed into the honing head (108). The end face of the boss (1071) abuts against the end face of the honing head (108) and axially limits the stepped portion (1024).

9. The honing tool (100) according to claim 1, characterized in that, The size detection unit also includes an adjustable limit trigger mechanism; The adjustable limit trigger mechanism includes: A tray (105), which is threadedly fitted onto the outside of the plug gauge seat (102), is used to set the end point of the travel of the plug gauge (101) to trigger the detection signal; and A locking nut (106), which is threaded onto the plug gauge seat (102) and located above the tray (105), is used to lock and fix the tray (105) after adjustment.

10. The honing tool (100) according to claim 8, characterized in that, It also includes a rounding plug (116); The rounding plug (116) is detachably connected to the flange tool holder (107) and is configured to push the push rod (112) by simulating machining feed action, so that the honing stone (110) expands to a rounded state, thereby providing conditions for the overall outer circle grinding of the honing tool (100) to be rounded.

11. A method for rounding an oilstone for the honing tool of claim 10, characterized in that, Includes the following steps: Install the rounding drive: assemble the rounding plug (116) into the flange knife handle (107) and abut against the push rod (112), so that it pushes the push rod (112) to move axially, thereby causing all the oilstones (110) to expand radially to the rounding state; Overall positioning: The honing tool (100) in the expanded state of the honing stone (110) is clamped as a whole on the external cylindrical grinding machine and positioned by the positioning references preset at both ends of the honing tool (100); Overall grinding: Start the external cylindrical grinding machine and perform overall grinding on the outer circumferential surface of the oilstone (110) until the outer diameter of all oilstones (110) is consistent and the total runout reaches the set accuracy requirement; Disassembly and Reset: Remove the rounding plug (116) so that the oilstone (110) can be radially retracted and reset under the action of the reset mechanism.

12. The method for rounding an oilstone according to claim 11, characterized in that, In the overall positioning step, a double center (117) is used for positioning, wherein the first center (117) is held in the center hole at the end of the flange tool holder (107), and the second center (117) is held in the center hole at the front end of the feed cone (111).

13. A method for precision hole honing, using the honing tool (100) as described in any one of claims 1-10, characterized in that, Includes the following steps: Synchronous processing and inspection: drive the honing tool (100) to rotate and feed axially, and at the same time drive the honing stone (110) to feed radially through the feeding mechanism to hone the inner hole of the workpiece (200). During this process, the plug gauge (101) moves with the tool and performs real-time contact inspection of the hole diameter. Signal triggering and judgment: When the inner hole of the workpiece (200) is honed to the target size, the plug gauge (101) falls into the hole to the depth set by the tray (105) under its own weight and axial feed, triggering a position detection signal; Closed-loop control response: Based on the position detection signal, the control system controls the honing tool to stop radial feed and machining at the current station.

Images