Honing tool with eccentric structure

Abstract

The present application relates to the field of honing technology, and particularly relates to a honing tool with eccentric structure, which comprises a honing rod and a honing bar, and the outer contour surface of the cutter rod of the honing rod is an eccentric outer circular contour surface relative to the axial cutter surface on one side of the tool center; or the outer contour surface of the cutter rod is divided into a coaxial outer circular contour surface of the cutter rod on one side of the cutter surface and an eccentric outer circular contour surface of the cutter rod on one side of the cutter back, which is used for making the radial height difference H1 of the cutter rod and the cutter head on one side of the cutter back greater than the radial height difference H2 of the cutter rod and the cutter head on one side of the cutter surface. The beneficial effect is that, through the eccentric design of the cutter rod, the radial height difference H1 of the cutter rod and the cutter head on one side of the cutter back can be increased without reducing the strength of the cutter rod, so that the rotation center of the honing tool can be adjusted in a larger range, and the service life is improved; meanwhile, the eccentric cutter rod is easy to manufacture, the overall cost of the honing tool is increased less, and when the cutter rod and the chip surface are both designed to be eccentric, the overall cost of the honing tool is even lower.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of honing technology, and particularly relates to a honing tool with an eccentric structure. BACKGROUND

[0002] The honing rod of the honing tool is generally divided into a tool head, a tool rod and a tool handle from front to back, the tool head has a honing bar that can expand outward, the outer contour surfaces of the tool head, the tool rod and the tool handle are coaxial, the tool rod is narrow relative to the tool head, and the tool rod and the tool head have a radial height difference.

[0003] The honing tool is divided into single-bar and multi-bar forms according to the number of embedded honing bars, the single-honing-bar honing tool has a honing bar on one side of the tool face of the tool head, the back of the tool head is a support surface, and the number of honing bars is generally one or more, such as the Chinese patent application CN208231537U disclosed by the applicant. The multi-honing-bar honing tool has honing bars on the tool face and the back of the tool head.

[0004] The single-honing-bar honing tool is further divided into a large-diameter single-honing-bar honing tool and a small-diameter single-honing-bar honing tool, the back of the large-diameter single-honing-bar honing tool has a retracted chip removal surface, a support bar is fixed on the chip removal surface, and the outer contour surface of the support bar serves as a support surface of the tool, and the small-diameter single-honing-bar honing tool directly uses the outer contour surface of the back side of the honing rod as the support surface.

[0005] When the single-honing-bar honing tool is used for honing, the support surface of the tool head will be worn, causing the honing center of the tool head to deviate from the rotation center of the tool, affecting the form and position tolerances and the surface roughness of the honing bore, and especially for honing of small bores, the honing rod will be broken.

[0006] When the honing center of the tool head deviates from the rotation center of the tool, the rotation center of the honing tool can be adjusted to coincide with the honing center again, for example, the axial displacement adjustable chuck of the honing tool of the Chinese patent application CN111922897A disclosed by the applicant can be used to adjust the rotation center of the honing tool.

[0007] However, the adjustment of the rotation center of the tool is limited, when the support surface of the tool head is worn too much, causing the radial height difference H1 between the tool rod and the tool head on the back side to be too small, the honing tool will also be scrapped and cannot be used again.

[0008] Although reducing the diameter of the tool rod can increase the radial height difference between the tool rod and the tool head, so that the honing tool can be adjusted in a larger range, the strength of the reduced tool rod is reduced, and the tool rod is prone to breaking at the tool rod, which cannot achieve the purpose of improving the service life. Although increasing the diameter of the tool rod can enhance the strength of the tool rod, so that the honing tool is not prone to breaking, the adjustment range after wear is small, and the purpose of improving the service life cannot be achieved.

[0009] The wear-resistant treatment of the honing rod can reduce the wear of the support surface of the small-diameter single honing strip honing tool, but the wear-resistant treatment increases the cost, and the honing rod after the wear-resistant treatment has poor elasticity and is prone to breakage.

[0010] The preparation method of the honing rod of the large-diameter single honing strip honing tool comprises the following steps:

[0011] 1. Center holes are punched at both ends of the rod, and the outer shape is machined, as shown in FIG. 1; Figure 1

[0012] 2. A positioning inclined groove 7 is milled, as shown in FIG. 2; Figure 2

[0013] 3. A positioning bottom plate notch 8 is milled, as shown in FIG. 3; Figure 3

[0014] 4. A wire cutting bottom plate groove 9 is performed, as shown in FIG. 4; Figure 4

[0015] 5. A positioning groove 10 at the front end of the honing rod is wire cut, as shown in FIG. 5; Figure 5

[0016] 6. A chip removal surface 6 of the tool bit is milled, as shown in FIG. 6; Figure 6

[0017] 7. A fixed support strip 5 is welded, as shown in FIG. 7. Figure 7 SUMMARY

[0018] The technical problem to be solved by the present application is how to improve the service life of the honing tool.

[0019] The technical scheme adopted by the present application to solve the technical problem is: a honing tool with an eccentric structure, comprising a honing rod and a honing strip, the honing rod is divided into a tool bit, a tool shank and a tool handle from front to back, the outer contour surface of the tool bit and the tool handle is coaxial relative to the center axis of the tool, the tool shank is a narrow part relative to the tool bit, the honing strip is located on one side of the tool face of the tool bit, the outer contour surface of the tool shank is an eccentric outer circular contour surface relative to the center axis of the tool towards one side of the tool face, for making the radial height difference H1 of the tool shank and the tool bit on the tool back side greater than the radial height difference H2 of the tool shank and the tool bit on the tool face side; or, the outer contour surface of the tool shank is divided into a tool shank coaxial outer circular contour surface on one side of the tool face and a tool shank eccentric outer circular contour surface on one side of the tool back, the tool shank coaxial outer circular contour surface is coaxial relative to the center axis of the tool, the tool shank eccentric outer circular contour surface is eccentric relative to the center axis of the tool towards one side of the tool face, for making the radial height difference H1 of the tool shank and the tool bit on the tool back side greater than the radial height difference H2 of the tool shank and the tool bit on the tool face side.

[0020] ​​​​​​​Further, the tool head comprises a tool head body and a support strip fixed on the tool back side of the tool head body, the outer contour surface of the tool head body is divided into a tool head coaxial outer circular contour surface on the tool face side and a tool head eccentric outer circular contour surface on the tool back side, the tool head coaxial outer circular contour surface is coaxial to the tool center axis, and the tool head eccentric outer circular contour surface is eccentric to the tool face side relative to the tool center axis and is used as a chip removal surface, and the support strip is fixed on the chip removal surface.

[0021] In order to more conveniently process the honing rod, further, the eccentricity of the tool head eccentric outer circular contour surface is the same as that of the tool rod eccentric outer circular contour surface.

[0022] The beneficial effects of the present application are that, through the eccentric design of the tool rod, the radial height difference H1 of the tool rod and the tool head on the tool back side can be increased without reducing the strength of the tool rod, the rotation center of the honing tool can be adjusted in a larger range, and the service life is improved.

[0023] Meanwhile, the tool rod with the eccentric design is convenient to manufacture, the overall cost of the honing tool is increased less, and when the tool rod and the chip removal surface are both designed to be eccentric, the overall cost of the honing tool is even lower. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0025] Figure 1 is a structural schematic view of the honing rod bar prepared in step 1 of the existing preparation method;

[0026] Figure 2 is a structural schematic view of the honing rod bar prepared in step 2 of the existing preparation method;

[0027] Figure 3 is a structural schematic view of the honing rod bar prepared in step 3 of the existing preparation method;

[0028] Figure 4 is a structural schematic view of the honing rod bar prepared in step 4 of the existing preparation method;

[0029] Figure 5 is a structural schematic view of the honing rod bar prepared in step 6 of the existing preparation method;

[0030] Figure 6 is Figure 5 A-A sectional view of

[0031] Figure 7 is the honing rod bar in Figure 5 after fixing the support strip;

[0032] Figure 8 is a structural schematic view of the honing rod bar prepared in step 2 of the embodiment 1 of the present application;

[0033] Figure 9 is a B-B sectional view of Figure 8 ;

[0034] Figure 10 is a structural schematic diagram of the honing rod bar prepared in step 2 of the embodiment 2 of the present application;

[0035] Figure 11 is a C-C sectional view of Figure 10 ;

[0036] Figure 12 is a structural schematic diagram of the honing rod bar prepared in step 2 of the embodiment 3 of the present application;

[0037] Figure 13 is a D-D sectional view of Figure 12 ;

[0038] Figure 14 is an E-E sectional view of Figure 12 ;

[0039] Figure 15 is a structural schematic diagram of the honing rod bar after the bottom plate groove is opened and the support strip is fixed in Figure 13 ;

[0040] In the figure, 1. tool center axis, 2. tool head, 2-1. tool head coaxial outer circular profile surface, 2-2. tool head eccentric outer circular profile surface, 3. tool rod, 3-1. tool rod coaxial outer circular profile surface, 3-2. tool rod eccentric outer circular profile surface, 4. tool handle, 5. support strip, 6. chip removal surface, 7. positioning inclined groove, 8. positioning bottom plate slot, 9. bottom plate groove, 10. positioning groove. DETAILED DESCRIPTION

[0041] Embodiment 1, as shown in Figure 8 and 9 , a honing tool with eccentric structure, specifically a small diameter single honing strip honing tool, comprising a honing rod and a honing strip, the honing rod is divided into a tool head 2, a tool rod 3 and a tool handle 4 from front to back, the outer profile surface of the tool head 2 and the tool handle 4 is coaxial with respect to the tool center axis 1, the tool rod 3 is a narrow part with respect to the tool head 2, the honing strip is located on the flank side of the tool head 2, the tool head 2 is a support surface on the back side, the outer profile surface of the tool rod 3 is an eccentric outer circular profile surface with respect to the tool center axis 1 to the flank side, for making the radial height difference H1 of the tool rod 3 and the tool head 2 on the back side greater than the radial height difference H2 of the tool rod 3 and the tool head 2 on the flank side.

[0042] The diameter of the tool bit 2 of the small-diameter single honing strip honing tool of the present embodiment 1 is between 4 mm and 10 mm, the radial height difference H2 is less than that of the existing honing rod box, between 0.1 mm and 0.2 mm, the radial height difference H1 is the same as that of the existing honing rod box, between 0.5 mm and 1.2 mm.

[0043] Other functional structures on the honing rod are the same as those of the existing small-diameter single honing strip honing tool, and will not be described in detail. For example, the honing strip is expandably installed in the bottom plate groove 9 of the honing rod, and the number of honing strips is one. The honing strip includes a bottom plate and an abrasive stone fixed on the bottom plate. The number of abrasive stones is also usually one.

[0044] The preparation method of the honing rod of the honing tool with eccentric structure of the present embodiment 1 includes the following processing steps:

[0045] (1) Coaxial clamping processing: taking the tool center shaft 1 as the rotating processing center, the outer circle of the rod material is processed to obtain the honing rod material, and the two ends of the honing rod material are tool bit 2 and tool handle 4.

[0046] Specifically, the other end of the rod material is clamped by the coaxial clamp of the lathe, a center hole is punched on the other end of the rod material, and the outer circle is processed; then, the other end of the rod material is processed to obtain the honing rod material.

[0047] (2) Eccentric clamping processing: taking the eccentric shaft eccentric to the tool face side relative to the tool center shaft 1 as the rotating processing center, the middle part of the honing rod material is processed to directly process the tool rod 3.

[0048] Specifically, the lathe clamps the one end of the honing rod material eccentrically by means of the eccentric clamp sleeve, and the middle part of the honing rod material is processed to directly process the tool rod 3.

[0049] (3) Subsequent processing is performed on the honing rod material as shown in Figure 8 and Figure 9 to complete the processing of the honing rod. Specifically, it includes: milling the positioning inclined groove 7; milling the positioning bottom plate groove 8; wire cutting the bottom plate groove 9; wire cutting the positioning groove 10 at the front end of the honing rod.

[0050] Embodiment 2, as shown in Figure 10 and 11As shown in FIG. 1, a honing tool with eccentric structure, specifically a small-diameter single honing bar honing tool, is basically the same as that of Example 1, except that the outer contour surface of the tool bar 3 is divided into a tool bar coaxial outer circular contour surface 3-1 on the tool face side and a tool bar eccentric outer circular contour surface 3-2 on the tool back side. The tool bar coaxial outer circular contour surface 3-1 is coaxial with the tool center axis 1, and the tool bar eccentric outer circular contour surface 3-2 is eccentric to the tool center axis 1 toward the tool face side, so as to make the radial height difference H1 of the tool bar 3 and the tool head 2 on the tool back side greater than the radial height difference H2 of the tool bar 3 and the tool head 2 on the tool face side.

[0051] The preparation method of the honing bar of the honing tool with eccentric structure of Example 2 comprises the following processing steps:

[0052] (1) Coaxial clamping processing: taking the tool center axis 1 as the rotating processing center, the outer circle of the bar material is processed to obtain a honing bar material with a narrowed middle part. The two ends of the honing bar material are the tool head 2 and the tool handle 4, and the middle part is the pre-processed tool bar 3. The radial height difference of the pre-processed tool bar 3 and the tool head 2 on the tool face and tool back side is the radial height difference H2.

[0053] Specifically, the same as Example 1, except that the pre-processed tool bar 3 is processed while the outer shape of the bar material is processed.

[0054] (2) Eccentric clamping processing: taking the eccentric axis eccentric to the tool center axis 1 toward the tool face side as the rotating processing center, the middle part of the honing bar material is processed to complete the processing of the tool bar 3.

[0055] Specifically, the lathe eccentrically clamps one end of the honing bar material by means of the eccentric clamping sleeve, and processes the outer circle of the middle part of the honing bar material to complete the processing of the tool bar 3.

[0056] (3) The honing bar material as shown in FIG. 1 is processed subsequently to complete the processing of the honing bar, which is the same as Example 1. Figure 10 and 11

[0057] Example 3, as shown in FIG. 1, Figure 12 , 13 ​, 14 and 15, a honing tool with eccentric structure, in particular a large-diameter single honing strip honing tool, comprising a honing rod and a honing strip, the honing rod is divided into a tool bit 2, a tool shank 3 and a tool handle 4 from front to back, the outer contour surface of the tool bit 2 and the tool handle 4 is coaxial with the tool center axis 1, the tool shank 3 is a narrow part relative to the tool bit 2, the honing strip is located on the flank side of the tool bit 2, the outer contour surface of the tool shank 3 is divided into a tool shank coaxial outer circular contour surface 3-1 on the flank side and a tool shank eccentric outer circular contour surface 3-2 on the back side, the tool shank coaxial outer circular contour surface 3-1 is coaxial with the tool center axis 1, the tool shank eccentric outer circular contour surface 3-2 is eccentric to the flank side relative to the tool center axis 1, for making the radial height difference H1 of the tool shank 3 and the tool bit 2 on the back side greater than the radial height difference H2 of the tool shank 3 and the tool bit 2 on the flank side.

[0058] The tool bit 2 comprises a tool bit body and a support strip 5 fixed on the back side of the tool bit body, the outer contour surface of the tool bit body is divided into a tool bit coaxial outer circular contour surface 2-1 on the flank side and a tool bit eccentric outer circular contour surface 2-2 on the back side, the tool bit coaxial outer circular contour surface 2-1 is coaxial with the tool center axis 1, the tool bit eccentric outer circular contour surface 2-2 is eccentric to the flank side relative to the tool center axis 1, for serving as a chip removal surface 6, the support strip 5 is fixed on the chip removal surface 6.

[0059] The diameter of the tool bit 2 of the large-diameter single honing strip honing tool of the present embodiment 3 is greater than or equal to 10 mm, the radial height difference H2 is less than that of the existing honing rod box, between 1.2 mm and 2.5 mm, the radial height difference H1 is the same as that of the existing honing rod box, between 1.5 mm and 3 mm.

[0060] Other functional structures on the honing rod are the same as those of the existing large-diameter single honing strip honing tool, and will not be described in detail. For example, the number of honing strips is one. The honing strip comprises a bottom plate and a grinding stone fixed on the bottom plate.

[0061] The preparation method of the honing rod of the honing tool with eccentric structure of the present embodiment 3 is basically the same as that of embodiment 2, also comprising the coaxial clamping processing step, the eccentric clamping processing step and the subsequent processing step, the difference lies in that in the eccentric clamping processing step of step (2), in addition to completing the processing of the tool shank 3, turning processing of the tool bit eccentric outer circular contour surface 2-2 is also performed.

[0062] Embodiment 4, a honing tool with eccentric structure, is basically the same as embodiment 3, the difference lies in that the eccentricity of the tool shank eccentric outer circular contour surface 3-2 is different from that of the tool bit eccentric outer circular contour surface 2-2, the eccentricity of the tool bit eccentric outer circular contour surface 2-2 is greater than that of the tool shank eccentric outer circular contour surface 3-2.

[0063] The preparation method of the honing rod of the honing tool with eccentric structure of this embodiment 4 is basically the same as that of embodiment 3, and the difference lies in that in the eccentric clamping machining step of step (2), after the machining of the tool rod 3 is completed by using one eccentric sleeve, secondary clamping is carried out by using another eccentric sleeve with different eccentricity, so that the turning machining of the eccentric outer circle contour surface 2-2 of the tool head can be carried out.

Claims

1. A honing tool with an eccentric structure, comprising a honing rod and a honing strip, wherein the honing rod is divided into a head (2), a shank (3), and a handle (4) from front to back, the outer contour surfaces of the head (2) and the handle (4) are coaxial with respect to the tool's central axis (1), the shank (3) is a narrower section relative to the head (2), and the honing strip is located on one side of the cutting surface of the head (2), characterized in that: The outer contour surface of the tool holder (3) is an outer circular contour surface that is eccentric to the side of the tool face relative to the tool center axis (1), which is used to make the radial height difference H1 between the tool holder (3) and the tool head (2) on the back side of the tool greater than the radial height difference H2 between the tool holder (3) and the tool head (2) on the side of the tool face; Alternatively, the outer contour surface of the tool holder (3) is divided into a coaxial outer circular contour surface (3-1) on the side of the tool face and an eccentric outer circular contour surface (3-2) on the side of the tool back. The coaxial outer circular contour surface (3-1) is coaxial with the tool center axis (1), and the eccentric outer circular contour surface (3-2) is eccentric with respect to the tool center axis (1) towards the side of the tool face. This is used to make the radial height difference H1 between the tool holder (3) and the tool head (2) on the side of the tool back greater than the radial height difference H2 between the tool holder (3) and the tool head (2) on the side of the tool face.

2. The honing tool with an eccentric structure according to claim 1, characterized in that: The cutting head (2) includes a cutting head body and a support bar (5) fixed to one side of the back of the cutting head body. The outer contour surface of the cutting head body is divided into a coaxial outer circle contour surface (2-1) on the cutting face side and an eccentric outer circle contour surface (2-2) on the back of the cutting head side. The coaxial outer circle contour surface (2-1) is coaxial with the tool center axis (1), and the eccentric outer circle contour surface (2-2) is eccentric to the cutting face side with respect to the tool center axis (1) and is used as a chip removal surface (6). The support bar (5) is fixed on the chip removal surface (6).

3. The honing tool with an eccentric structure according to claim 2, characterized in that: The eccentricity of the cutter head eccentric outer circular profile surface (2-2) is the same as that of the cutter bar eccentric outer circular profile surface (3-2).

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