CN109366261B - Peripheral grinding process and device for butterfly blade - Google Patents
Peripheral grinding process and device for butterfly blade Download PDFInfo
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- CN109366261B CN109366261B CN201811218626.4A CN201811218626A CN109366261B CN 109366261 B CN109366261 B CN 109366261B CN 201811218626 A CN201811218626 A CN 201811218626A CN 109366261 B CN109366261 B CN 109366261B
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- grinding
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- blade
- butterfly blade
- butterfly
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/46—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of disc blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention relates to a periphery grinding process and a periphery grinding device for a butterfly blade, which solve the problems that two small peripheries of the butterfly blade are provided with concave arcs and the grinding of a periphery grinding machine cannot be realized and the relative hole symmetry is poor in the grinding process. The method comprises the steps of firstly placing a butterfly blade on a peripheral grinding machine to carry out peripheral grinding around an eccentric taper hole on the large periphery and the non-periphery, then placing the butterfly blade with the pre-ground periphery on a clamp, arranging the clamp on a workbench of a flat grinding machine, positioning and clamping by using two clamp pressing blocks, grinding a small periphery with an internal concave arc by using a parallel grinding wheel, then loosening the clamp pressing block, grinding the small periphery of the butterfly blade (turning and clamping, and grinding the small periphery of the other internal concave arc by using the parallel grinding wheel, and finally realizing the grinding processing of the three peripheries.
Description
Technical Field
The invention relates to a periphery grinding process of a butterfly blade, in particular to a periphery grinding method and a grinding device of the butterfly blade.
Background
The indexable insert is one of the important cutting tools for cutting and machining at present, and is widely applied due to the fact that the indexable insert can be replaced, saves materials and efficiently exchanges tools. The highly efficient and exchangeable prerequisite for indexable inserts is good peripheral positioning accuracy.
The butterfly blade is widely applied because of the special structure, which provides special functions of compact structure and multiple blades for efficiently cutting the replaceable blade. However, three peripheries of the butterfly-shaped blade are asymmetrically distributed relative to the central hole, and meanwhile, the small periphery is internally provided with the concave arc platform and cannot be processed and finished by the numerical control peripheral grinding machine in a high-efficiency and high-precision mode.
Disclosure of Invention
The invention aims to provide a process and a device for grinding the periphery of a butterfly blade, wherein the small periphery of the butterfly blade is provided with a concave arc platform, so that the small periphery of the butterfly blade cannot be processed by a numerical control peripheral grinding machine in a high-efficiency and high-precision manner at one time, and the periphery of the grinded butterfly blade is high in positioning precision.
The invention is realized by the following steps:
a grinding method for the periphery of a butterfly blade comprises a clamp 2, a pressing block 3 and a pressing screw 8, wherein two working faces of the small periphery of the butterfly blade are distributed in a regular triangle manner relative to the large periphery, a positioning groove on the clamp 2 is profiled with one corner of the butterfly blade, a first edge which is attached to the large periphery M1 of the butterfly blade and is 60 degrees relative to the clamping horizontal direction is arranged, pre-grinding edges M2 and M3 of the butterfly blade are attached, a second edge which is attached to the large periphery M1 of the butterfly blade and is 60 degrees to 70 degrees relative to the clamping horizontal direction is arranged, (the angle dimension of the angle dimension is derived from that the pre-grinding edges M2 and M3 of the butterfly blade are irregular surfaces, and the angle of the angle is. The clamp 2 is also provided with a screw hole which is matched with the compression screw 8 for use, and the connecting pressing block 3 ensures that the blade is ensured to be clamped under the action of screw tightening force.
Comprises the following steps of (a) carrying out,
a. the left and right peripheral grinding centering chucks 5 are adjusted based on the large faces M7 and M8 of the butterfly blade and the eccentric tapered hole M4, and the blade is clamped on the left and right peripheral grinding centering chucks 5. The opposite surface of the peripheral grinding centering chuck is an arc surface matched with the taper hole surfaces of the two surfaces of the blade, the arc surface is in contact clamping with the taper hole surfaces of the two surfaces of the blade, symmetrical tangent lines generated by the contact of the arc surface and the taper hole surfaces of the blade can form resultant forces with equal size and opposite directions in the axial direction of the taper holes of the two surfaces of the butterfly blade in space to generate a centering effect, the left and right peripheral grinding centering chucks 5 are fixed on a peripheral grinding machine and transmit clamping force generated by the machine,
b. grinding the large periphery of the butterfly blade by using the grinding wheel 4, then pre-grinding non-periphery M2 and M3 by deflecting the grinding wheel 4 in the direction of 60-70 degrees, after finishing, unloading the periphery grinding centering chuck 5,
c. the large periphery M1 and the pre-ground small peripheries M2 and M3 are combined, the butterfly blade is positioned and clamped on a clamp 2 by a pressing block 3, and the clamp 2 is horizontally placed and fixed on a workbench of a flat grinding machine.
d. And grinding the small periphery of one in-band concave arc by using the parallel grinding wheel, loosening the clamp pressing block 3, turning over the butterfly blade and clamping the butterfly blade, and grinding the small periphery of the other in-band concave arc by using the parallel grinding wheel.
In the step b, the central distance between the large peripheral working surface of the butterfly blade and the central tapered hole is (t- δ) =4.5 ± 0.01 mm. Be is the distance of the center of the circle of the butterfly blade inscribed circle relative to the center of the butterfly blade center taper hole, K1 is the distance from the small periphery M5 and M6 to the center taper hole, t is the distance from the large periphery M1 to the butterfly blade center taper hole, a is the included angle between the small periphery M5 and M6 and the large periphery M1, and PhiD is the diameter value of the inscribed circle of the three sides of the small periphery M5 and M6 and the large periphery M1.
In the step D, the center distance deviation sigma of the phi D circle center relative to the central conical hole is smaller than 0.05 mm.
In the steps b and d, the planeness of the working surfaces of the large periphery and the two small peripheries of the butterfly blade is less than 0.005mm, and the verticality relative to the two planes M7 and M8 of the butterfly blade is less than 0.007 mm.
The centering clamp comprises a clamp 2, a pressing block 3, a compression screw 8, a left and right periphery grinding centering chuck 5, wherein two small periphery working faces of a butterfly blade are distributed in a regular triangle manner relative to a large periphery, a positioning groove on the clamp is profiled with one corner of the butterfly blade, a first edge which is attached to the large periphery (M1) of the butterfly blade and is 60 degrees relative to the clamping horizontal direction is arranged, a pre-grinding edge (M2 and M3) which is attached to the butterfly blade is arranged, a second edge which is attached to the large periphery (M1) of the butterfly blade and is 60 degrees-70 degrees relative to the clamping horizontal direction is arranged, the butterfly blade is provided with symmetrical two-sided conical holes, and opposite faces of the left and right periphery grinding centering chuck.
The invention analyzes the peripheral grinding characteristics of the butterfly blade aiming at the peripheral precise and efficient grinding requirements of the butterfly blade, improves the grinding precision of the large periphery by process innovation and device design, and solves the problem of grinding the concave surface of the small periphery by a new device and a new process.
The invention has the following advantages:
1. compared with the traditional butterfly blade peripheral grinding, the peripheral grinding machine has the advantages that the peripheral grinding machine realizes automatic transposition by utilizing the control of a numerical control system, obviously improves the transposition precision and can improve the reliability of a transposition cutter. The numerical control system controls automatic transposition to be realized as follows: when the blade is linearly interpolated in the peripheral processing process, the blade is also angularly interpolated relative to the center hole of the butterfly blade, two surfaces M2 and M3 are naturally formed after processing, and because the programs are fixed, the linear interpolation and the angular adjustment are also changed according to the same parameters, and the angle formed by the processed surface is well ensured.
2. Compared with the traditional butterfly blade peripheral grinding which is positioned by a single manual clamp, the consistency of the peripheral dimension of the blade is poor, the opposite surfaces of the left and right peripheral grinding centering chucks 5 of the invention are arc surfaces matched with the taper hole surfaces of the two surfaces of the blade, the two ends of the peripheral grinding centering chucks are provided with arc surfaces, the arc surfaces are in contact clamping with the taper hole surfaces of the two surfaces of the blade, the opposite surfaces of the peripheral grinding centering chucks are arc surfaces matched with the taper hole surfaces of the two surfaces of the blade, the arc surfaces are in contact clamping with the taper hole surfaces of the two surfaces of the blade, by utilizing a symmetrical tangent line generated by the contact of the arc surfaces and the taper hole surfaces of the blade, resultant forces with equal size and opposite directions in the axial direction of the taper holes of the two surfaces of the butterfly blade can be formed in space to generate a centering effect, the left and right peripheral grinding centering chucks 5 are fixed on a peripheral grinding machine and transmit clamping force generated by the, the product precision of the blade is improved.
3. The periphery grinding process and the grinding device of the butterfly blade have the advantages that the small periphery with the concave circular arc platform can be processed by a numerical control periphery grinding machine in a high-efficiency and high-precision mode, and the periphery of the grinded butterfly blade is high in positioning precision. The grinding machine has the characteristics of high peripheral processing precision, high efficiency and high precision grinding of the concave periphery, high peripheral positioning precision of the grinded butterfly blade, good interchangeability, reliable clamping of the blade on a tool holder and long service life of the blade.
Drawings
Figure 1 is a schematic diagram of a grinding facet.
FIG. 2 is a schematic view of the peripheral grinding and pre-grinding clamping.
Fig. 3 is a top view of a butterfly blade.
Fig. 4 is a side view of a butterfly blade.
FIG. 5 is a schematic view of a peripheral grinding centering collet.
FIG. 6 is a schematic view of a clamp.
Detailed Description
Example 1:
a method for grinding the periphery of a butterfly blade, the small periphery grinding device of the butterfly blade includes the clamp 2, the briquetting 3, the hold-down screw 8, two small peripheral working faces of the butterfly blade become the regular triangle distribution relatively to the large periphery, the locating slot on the clamp 2 and a corner profile modeling of the butterfly blade, have the first side relative to clamping horizontal direction of 60 degrees of laminating the large periphery M1 of the butterfly blade, there are laminating butterfly blade and grinding the side M2, M3 in advance, it is relative to clamping horizontal direction 60 degrees-70 degrees second sides, its angular dimension comes from: the pre-grinding edges M2 and M3 of the butterfly blades are irregular surfaces, and the angle of the angle is automatically compensated by a numerical control system in the grinding process.
Comprises the following steps of (a) carrying out,
a. the left and right peripheral grinding centering chucks 5 are adjusted based on the large faces M7 and M8 of the butterfly blade and the eccentric tapered hole M4, and the blade is clamped on the left and right peripheral grinding centering chucks 5. The opposite surface of the peripheral grinding centering chuck 5 is an arc surface matched with the taper hole surfaces on the two surfaces of the blade, and the arc surface is contacted with the taper hole surfaces on the two surfaces of the blade to clamp and center.
b. Grinding the large periphery of the butterfly blade by using the grinding wheel 4, then pre-grinding non-periphery M2 and M3 by deflecting the grinding wheel 4 in the direction of 60-70 degrees, after finishing, dismounting the periphery grinding centering chuck 5,
c. the large periphery M1 and the pre-ground small peripheries M2 and M3 are combined, the butterfly blade is positioned and clamped on a clamp 2 by a pressing block 3, and the clamp 2 is horizontally placed and fixed on a workbench of a flat grinding machine.
d. And grinding the small periphery of one in-band concave arc by using the parallel grinding wheel, loosening the clamp pressing block 3, turning over the butterfly blade and clamping the butterfly blade, and grinding the small periphery of the other in-band concave arc by using the parallel grinding wheel.
In the step b, the central distance between the large peripheral working surface of the butterfly blade and the central tapered hole is (t- δ) =4.5 ± 0.01 mm. Be is the distance between the center of the circle inscribed in the butterfly blade and the center of the conical hole in the center of the butterfly blade, Be <0.05mm, K1 is the distance between the small periphery M5 and M6 and the central conical hole, K1=5.085mm, t is the distance between the large periphery M1 and the conical hole in the center of the butterfly blade, t =4.5mm, a is the included angle between the small periphery M5 and M6 and the large periphery M1, a =60 °, Φ D is the diameter value of the three-side inscribed circle between the small periphery M5 and M6 and the large periphery M1, and Φ D =10.17 mm.
In the step D, the two small peripheral working surfaces of the butterfly blade are distributed in a regular triangle relative to the large periphery, namely, the extension lines of the two small peripheral working surfaces and the large periphery respectively form an included angle of 60 degrees, and simultaneously, the central distance Be of the phi D circle center relative to the central conical hole is smaller than 0.05 mm.
In the steps b and d, the planeness of the working surfaces of the large periphery and the two small peripheries of the butterfly blade is less than 0.005mm, and the verticality relative to the two planes M7 and M8 of the butterfly blade is less than 0.007 mm.
Example 2:
the periphery grinding device of the butterfly blade comprises a clamp 2, a pressing block 3, a compression screw 8 and a centering chuck 5 for grinding the left periphery and the right periphery, wherein two small periphery working faces of the butterfly blade are distributed in a regular triangle relative to a large periphery, a positioning groove on the clamp is profiled with one corner of the butterfly blade, a first side which is attached to the large periphery M1 of the butterfly blade and is 60 degrees relative to the clamping horizontal direction is arranged, pre-grinding sides M2 and M3 of the butterfly blade are attached, a second side which is 60 degrees to 70 degrees relative to the clamping horizontal direction is arranged, the butterfly blade is provided with symmetrical two-sided taper holes, and the opposite faces of the centering chuck 5 for grinding the left periphery and the right periphery are arc faces matched with the two-sided taper hole faces of.
Claims (4)
1. A method for grinding the periphery of a butterfly blade is characterized in that: the small periphery grinding device of the butterfly blade comprises a clamp (2), a pressing block (3) and a compression screw (8), wherein two small periphery working faces and a large periphery of the butterfly blade jointly form a regular triangle distribution, a positioning groove on the clamp is profiled with one corner of the butterfly blade, a 1 st side which is attached to the large periphery (M1) of the butterfly blade and forms an angle of 60 degrees relative to the clamping horizontal direction and a 2 nd side which is attached to the 1 st and 2 nd pre-grinding sides (M2 and M3) of the butterfly blade and forms an angle of 60 degrees to 70 degrees relative to the clamping horizontal direction are arranged, the butterfly blade is provided with symmetrical eccentric tapered holes, opposite surfaces of a left and right periphery grinding centering chuck (5) are arc surfaces matched with the eccentric tapered hole surfaces of the butterfly blade, and the grinding device comprises the following steps,
a. by taking the 1 st plane and the 2 nd plane (M7 and M8) and the eccentric taper hole (M4) of the butterfly blade as the standard, adjusting the left and the right periphery grinding centering chucks (5), clamping the blade on the left and the right periphery grinding centering chucks, wherein the opposite surfaces of the periphery grinding centering chucks are arc surfaces matched with the eccentric taper hole surface of the blade, the arc surfaces are in contact clamping with the eccentric taper hole surface of the blade, and by utilizing symmetrical tangent lines generated by the contact of the arc surfaces and the eccentric taper hole surface of the blade, acting forces with equal magnitude and opposite directions in the axial direction of the eccentric taper hole of the butterfly blade can be formed in space to generate a centering effect, and the left and the right periphery grinding centering chucks (5) are fixed on a periphery grinding machine and transmit clamping force generated by the machine tool,
b. grinding the large periphery of the butterfly blade by using a grinding wheel (4), then pre-grinding the 1 st and 2 nd pre-ground edges (M2 and M3) by deflecting the grinding wheel (4) in the direction of 60-70 degrees, after finishing, disassembling a periphery grinding centering chuck (5),
c. combining the large periphery (M1) and the 1 st and 2 nd pre-grinding edges (M2, M3), positioning and clamping the butterfly blade on a clamp (2) by a pressing block (3), wherein the clamp (2) is horizontally placed and fixed on a workbench of a flat grinding machine,
d. and (3) grinding the small periphery of one in-band concave arc by using the parallel grinding wheel, then loosening the clamp pressing block (3), turning over the butterfly blade and clamping the butterfly blade, and grinding the small periphery of the other in-band concave arc by using the parallel grinding wheel.
2. The method of grinding the periphery of a butterfly blade as claimed in claim 1, wherein: in the step b, the distance between the large periphery working surface of the butterfly blade and the center of the eccentric tapered hole is (t-sigma) =4.5 +/-0.01 mm, wherein sigma is the distance between the center of an inscribed circle of the butterfly blade and the center of the eccentric tapered hole of the butterfly blade, and t is the distance between the large periphery (M1) and the eccentric tapered hole of the butterfly blade.
3. The method of grinding the periphery of a butterfly blade as set forth in claim 2, wherein: the deviation sigma of the center of the phi D circle from the center of the eccentric tapered hole is less than 0.05mm, and the phi D is the diameter value of a trilateral inscribed circle of a small periphery (M5, M6) and a large periphery (M1).
4. The method of grinding the periphery of a butterfly blade as claimed in claim 1, wherein: in the steps b and d, the flatness of the working surfaces of the large periphery and the two small peripheries of the butterfly blade is less than 0.005mm, and the verticality relative to the 1 st and 2 nd planes (M7 and M8) of the butterfly blade is less than 0.007 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811218626.4A CN109366261B (en) | 2018-10-19 | 2018-10-19 | Peripheral grinding process and device for butterfly blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811218626.4A CN109366261B (en) | 2018-10-19 | 2018-10-19 | Peripheral grinding process and device for butterfly blade |
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| Publication Number | Publication Date |
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| CN109366261A CN109366261A (en) | 2019-02-22 |
| CN109366261B true CN109366261B (en) | 2021-06-29 |
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| CN201811218626.4A Active CN109366261B (en) | 2018-10-19 | 2018-10-19 | Peripheral grinding process and device for butterfly blade |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114473596B (en) * | 2022-03-18 | 2024-04-19 | 安徽省凌锋冶金机械有限公司 | Fixed turning and grinding clamp for left-right rotary scrap shears and application thereof |
| CN118513919A (en) * | 2024-07-23 | 2024-08-20 | 新拓精密刀具(浙江)有限公司 | Carbide three-edge groove blade processing equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006035845A1 (en) * | 2006-08-01 | 2008-02-07 | Erwin Junker Maschinenfabrik Gmbh | Method of grinding an indexable insert and grinding wheel for carrying out the grinding process |
| JP2013018096A (en) * | 2011-07-13 | 2013-01-31 | Hitachi Tool Engineering Ltd | Outer peripheral surface grinding method of insert |
| CN202964304U (en) * | 2012-11-30 | 2013-06-05 | 綦江齿轮传动有限公司 | Multidigit blade relief grinding fixture |
| CN203156467U (en) * | 2013-03-21 | 2013-08-28 | 河南富耐克超硬材料股份有限公司 | Grinding clamp of blade |
| CN206296741U (en) * | 2016-11-08 | 2017-07-04 | 镇江东艺机械有限公司 | For the fixture of indexable insert tip, throw away tip grinding |
| CN207387248U (en) * | 2017-09-13 | 2018-05-22 | 茂康材料科技（常熟）有限公司 | A kind of grip device for blade grinding |
| CN108568710A (en) * | 2018-05-11 | 2018-09-25 | 广西奇飞科技有限公司 | A kind of dish blade processing fixed swivel base of polishing |
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