CN111633253A - Processing method for milling groove of round nut - Google Patents
Processing method for milling groove of round nut Download PDFInfo
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- CN111633253A CN111633253A CN202010513150.8A CN202010513150A CN111633253A CN 111633253 A CN111633253 A CN 111633253A CN 202010513150 A CN202010513150 A CN 202010513150A CN 111633253 A CN111633253 A CN 111633253A
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- Prior art keywords
- groove
- milling
- workpiece
- positioning block
- flat tongs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/28—Grooving workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G9/00—Working screws, bolt heads, or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanks; Finishing, e.g. polishing, any screw-thread
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G9/00—Working screws, bolt heads, or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanks; Finishing, e.g. polishing, any screw-thread
- B23G9/005—Working nuts
- B23G9/006—Slotting nuts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The processing method of the round nut milling groove comprises two major parts, namely a straight groove part of the milling groove and an arc groove part of the milling groove; the invention adopts a new improved tool method, overcomes the defects of long cutter bar and poor rigidity in the original process, increases the cutting amount, and the qualification rate of the produced part product can reach 100 percent, and the production efficiency is greatly improved compared with the processing in a processing center, wherein each part needs to be used for about 45 minutes by adopting the original processing method, each part needs to be used for 10 minutes by adopting the new tool method, the new tool method obviously improves the production efficiency, saves 2/3 processing time, ensures the quality, improves the production efficiency, and reduces the cost, the expense and the labor time of the cutter.
Description
Technical Field
The invention relates to a processing method for milling a groove in a round nut.
Background
As shown in figures 1 and 2, in the milling process, the round nut needs to finish the processing of 6 grooves, each groove consists of two parts, namely a straight groove part, a groove width of 4mm and a groove depth of 5mm, the other part is an arc groove, the groove width is 4mm, the groove bottom is an arc of R30, and the groove surface roughness is Ra6.3. The method is characterized in that a part to be machined, namely a round nut, is made of 1Cr12Ni2WMoVNb stainless steel, heat treatment is carried out on the part HBC 30-36, in the groove milling process, machining equipment of an original process selects a machining center for machining, in the machining process, a special cutter is needed for the cutter needed by the part, the cutter bar of the cutter is long, large cutting amount cannot be used in the use, the machined surface roughness is poor, and a machined product cannot meet the process requirement. Therefore, a reasonable, economical and efficient processing technology must be adopted, the efficiency is improved, and economical milling equipment is selected.
The conventional processing method in the groove milling process comprises the following steps:
1) turning the blank in the groove milling process, wherein the blank is shown in figures 3 and 4, the part is circular, the thickness of the part is 16mm, the outer circle is phi 65, and the inner hole is a threaded hole (M52 multiplied by 1.5-6H); the material 1Cr12Ni2WMoVNb is chromium-nickel stainless steel which has excellent comprehensive mechanical property, high heat strength, good toughness and difficult processing. The material 1Cr12Ni2WMoVNb contains 12-30% of chromium, 6-12% of nickel and a small amount of elements;
2) machine tool selection of the existing process: processing by a VTC-16AN processing center;
3) the cutter selection of the existing process is as follows: a special T-shaped slot milling cutter is used for processing, as shown in figures 5 and 6;
4) the existing process comprises the following processing steps: on a VTC-16AN machining center machine tool, carrying out groove milling machining by using a special T-shaped groove milling cutter according to a machining track; after the first groove and the second groove are milled, the workpiece needs to rotate by 60 degrees, the third groove and the fourth groove are machined by the same method, and the fifth groove and the sixth groove are machined in the same way.
5) The processing difficulty is as follows: 1. the cutter bar is longer and has poor rigidity; the cutting amount is small, and the production efficiency is low; the size is difficult to ensure, and the qualified rate is low. The roughness of the processed surface is poor, the vibration lines exist, and the quality can not meet the process requirement. 2. The selected equipment is expensive and low in efficiency, so that the processing cost is high; 3. because the arc groove is arranged on the part, the machining center can only be ensured by a forming cutter, and the machining on the machining center can cause the connection dislocation and the unsmooth of the arc groove and the straight groove part, and the yield is low.
Disclosure of Invention
The invention aims to solve the technical problems that the connection of the arc groove and the straight groove is staggered, not smooth and low in qualified rate when the machining center is machined.
In order to solve the technical problems, the invention adopts the following technical scheme:
the processing method of the round nut milling groove comprises two major parts, namely a straight groove part of the milling groove and an arc groove part of the milling groove;
the straight groove part of the milling groove comprises the following steps:
the method comprises the following steps: selecting a machine tool as an X62W universal milling machine, and selecting machine tool accessories as a universal dividing table and a three-jaw chuck; before milling is started, the center position of the three-jaw chuck and the center position of the milling blade are corrected by using a dial indicator, the center point of the three-jaw chuck needs to be aligned, and the machining can be started only when the symmetry degree cannot exceed the tolerance range of the product;
step two: a workpiece is clamped on a three-jaw chuck on the indexing table, and the jaws use soft jaws to prevent clamping the outer circle of the workpiece; when a straight groove is milled by a saw blade milling cutter, the universal indexing table is rotated for 60 degrees, indexing is accurate, and another straight groove is milled;
step three: rotating the universal indexing table by 60 degrees, and milling the last straight groove;
the circular arc groove part of the milling groove comprises the following steps:
the method comprises the following steps: selecting a positioning block of a workpiece;
step two: positioning of the workpiece: the positioning block is fixed on the workbench, a straight groove milled by a workpiece is used as a positioning groove, and a convex part in the positioning block is embedded into the straight groove of the workpiece;
step three: clamping the workpiece: correcting flat tongs, wherein the flat tongs are fixed on a workbench; placing a positioning block into the flat tongs, enabling the positioning block to be tightly attached to the flat tongs, fixing the positioning block by using a pressing plate to fix the position of the positioning block, placing a workpiece into the flat tongs, using a milled straight groove of the workpiece as a positioning groove, embedding a convex part in the positioning block into the straight groove of the workpiece, and clamping the workpiece by using the flat tongs to process;
step four: selecting a cutter: selecting a disc saw blade milling cutter; the thickness dimension of the blade is required to be equal to the width dimension of the workpiece groove, and half of the diameter dimension of the blade is equal to the radius dimension of the bottom of the arc groove;
step five: selection of a machine tool: adjusting to a horizontal position by an X62W universal milling machine;
step six: milling the arc groove: the flat tongs need to be fixed on a milling machine workbench; placing a positioning block into the flat tongs, enabling the positioning block to be tightly attached to the flat tongs, fixing the positioning block by using a pressing plate to fix the position of the positioning block, using a milled straight groove of a workpiece as a positioning groove, embedding a convex part in the positioning block into the straight groove of the workpiece, and then clamping the workpiece by using the flat tongs; the disc saw blade milling cutter with the external diameter of phi 60 is arranged in a cutter bar to be fixed, the thickness center of a milling cutter blade is adjusted to be superposed with the center line of a processed part, and then the height position of the disc saw blade milling cutter is adjusted; the highest point of the blade is aligned to the position of a product to be machined, the upper and lower sizes of the workbench are adjusted by a dial indicator for machining, after the first arc groove is machined, the workbench is lowered, the rear arc grooves are machined sequentially, and the milling reaches the size requirement shown in the figure.
The beneficial effect of adopting above-mentioned technical scheme is:
the invention adopts a new improved tool method, overcomes the defects of long cutter bar and poor rigidity in the original process, increases the cutting amount, and the qualification rate of the produced part product can reach 100 percent, and the production efficiency is greatly improved compared with the processing in a processing center, wherein each part needs to be used for about 45 minutes by adopting the original processing method, each part needs to be used for 10 minutes by adopting the new tool method, the new tool method obviously improves the production efficiency, saves 2/3 processing time, ensures the quality, improves the production efficiency, and reduces the cost, the expense and the labor time of the cutter.
Drawings
Fig. 1 is a schematic structural view of a round nut.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic view of the structure of a processed blank.
Fig. 4 is a left side view of fig. 1.
Fig. 5 is a schematic view of a prior art cutter structure.
Fig. 6 is a top view of fig. 5.
FIG. 7 is a schematic view of a positioning block according to the present invention.
Fig. 8 is a top view of fig. 7.
Fig. 9 is a left side view of fig. 7.
FIG. 10 is a schematic view of the positioning block and the components of the present invention.
Fig. 11 is a top view of fig. 10.
FIG. 12 is a schematic view of the part clamp of the present invention.
Fig. 13 is a top view of fig. 12.
Fig. 14 is a schematic view showing the construction of the circular saw blade milling cutter according to the present invention.
Fig. 15 is a top view of fig. 14.
Fig. 16 is a schematic view of the processing of the circular arc groove in the present invention.
Fig. 17 is a top view of fig. 16.
Fig. 18 is a partial enlarged view of fig. 16 at B.
In the figure: 1-positioning block, 2-workpiece, 3-flat tongs, 4-cutter bar and 5-disc saw blade milling cutter.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
the processing method of the round nut milling groove comprises two major parts, namely a straight groove part of the milling groove and an arc groove part of the milling groove;
the straight groove part of the milling groove comprises the following steps:
the method comprises the following steps: firstly, milling a straight groove part of a groove; machine tool: X62W universal milling machine, machine tool attachment: universal indexing table, three-jaw chuck. Before milling is started, the center position of the three-jaw chuck and the center position of the milling blade are corrected by using a dial indicator, the center point of the three-jaw chuck needs to be aligned, and the machining can be started only when the symmetry degree cannot exceed the tolerance range of the product;
step two: a workpiece is clamped on a three-jaw chuck on the indexing table, and the jaws use soft jaws to prevent clamping the outer circle of the workpiece; when a straight groove is milled by a saw blade milling cutter, the universal indexing table is rotated for 60 degrees, indexing is accurate, and another straight groove is milled;
step three: rotating the universal indexing table by 60 degrees, and milling the last straight groove; in the working procedure, the groove width dimension of 4+0.10 +0.05 needs to be strictly controlled, and because the groove width is the reference for milling the arc groove in the next step, if 6 grooves milled are not uniform, connection dislocation can be caused when the arc groove is milled, and the processed product is scrapped;
the circular arc groove part of the milling groove comprises the following steps:
the method comprises the following steps: the positioning block of the workpiece is shown in fig. 7, 8 and 9;
step two: positioning of the workpiece: as shown in fig. 10 and 11; the positioning block is fixed on the workbench, a straight groove milled by a workpiece is used as a positioning groove, and the convex part in the positioning block in the figures 7, 8 and 9 is embedded into the straight groove of the workpiece;
step three: clamping the workpiece: correcting flat tongs, wherein the flat tongs are fixed on a workbench; placing a positioning block into flat tongs (shown in figure 8), enabling the positioning block to be tightly attached to the flat tongs, fixing the positioning block by using a pressing plate to fix the position of the positioning block, placing a workpiece into the flat tongs, using a milled straight groove of the workpiece as a positioning groove, embedding a convex part in the positioning block into the straight groove of the workpiece, and clamping the workpiece by using the flat tongs at the positions shown in figures 12 and 13 to process;
step four: selecting a cutter: selecting a disc saw blade milling cutter; as shown in fig. 14 and 15:
the thickness dimension of the blade is required to be equal to the width dimension of the workpiece groove, and half of the diameter dimension of the blade is equal to the radius dimension of the bottom of the arc groove;
step five: selection of a machine tool: adjusting to a horizontal position by an X62W universal milling machine;
step six: milling the arc groove: the flat tongs need to be fixed on a milling machine workbench; and (3) placing the positioning block into the flat-nose pliers, as shown in figures 16, 17 and 18, tightly attaching the positioning block to the flat-nose pliers, fixing the positioning block by using a pressing plate to fix the position of the positioning block, placing the workpiece into the position shown in figures 16, 17 and 18, using a milled straight groove of the workpiece as a positioning groove, embedding a convex part in the positioning block into the straight groove of the workpiece, and clamping the workpiece by using the flat-nose pliers. The disc saw blade milling cutter with the external diameter of phi 60 is arranged in a cutter bar to be fixed, the thickness center of a milling cutter blade is adjusted to be superposed with the center line of a processed part, and then the height position of the disc saw blade milling cutter is adjusted; the highest point of the blade is aligned to the position of a product to be machined, the upper and lower sizes of the workbench are adjusted by a dial indicator for machining, after the first arc groove is machined, the workbench is lowered, the rear arc grooves are machined sequentially, and the milling reaches the size requirement shown in the figure.
Claims (1)
1. The round nut groove milling processing method is characterized in that: the milling cutter comprises a straight groove part for milling a groove and an arc groove part for milling the groove;
the straight groove part of the milling groove comprises the following steps:
the method comprises the following steps: selecting a machine tool as an X62W universal milling machine, and selecting machine tool accessories as a universal dividing table and a three-jaw chuck; before milling is started, the center position of the three-jaw chuck and the center position of the milling blade are corrected by using a dial indicator, the center point of the three-jaw chuck needs to be aligned, and the machining can be started only when the symmetry degree cannot exceed the tolerance range of the product;
step two: a workpiece is clamped on a three-jaw chuck on the indexing table, and the jaws use soft jaws to prevent clamping the outer circle of the workpiece; when a straight groove is milled by a saw blade milling cutter, the universal indexing table is rotated for 60 degrees, indexing is accurate, and another straight groove is milled;
step three: rotating the universal indexing table by 60 degrees, and milling the last straight groove;
the circular arc groove part of the milling groove comprises the following steps:
the method comprises the following steps: selecting a positioning block of a workpiece;
step two: positioning of the workpiece: the positioning block is fixed on the workbench, a straight groove milled by a workpiece is used as a positioning groove, and a convex part in the positioning block is embedded into the straight groove of the workpiece;
step three: clamping the workpiece: correcting flat tongs, wherein the flat tongs are fixed on a workbench; placing a positioning block into the flat tongs, enabling the positioning block to be tightly attached to the flat tongs, fixing the positioning block by using a pressing plate to fix the position of the positioning block, placing a workpiece into the flat tongs, using a milled straight groove of the workpiece as a positioning groove, embedding a convex part in the positioning block into the straight groove of the workpiece, and clamping the workpiece by using the flat tongs to process;
step four: selecting a cutter: selecting a disc saw blade milling cutter; the thickness dimension of the blade is required to be equal to the width dimension of the workpiece groove, and half of the diameter dimension of the blade is equal to the radius dimension of the bottom of the arc groove;
step five: selection of a machine tool: adjusting to a horizontal position by an X62W universal milling machine;
step six: milling the arc groove: the flat tongs need to be fixed on a milling machine workbench; placing a positioning block into the flat tongs, enabling the positioning block to be tightly attached to the flat tongs, fixing the positioning block by using a pressing plate to fix the position of the positioning block, using a milled straight groove of a workpiece as a positioning groove, embedding a convex part in the positioning block into the straight groove of the workpiece, and then clamping the workpiece by using the flat tongs; the disc saw blade milling cutter with the external diameter of phi 60 is arranged in a cutter bar to be fixed, the thickness center of a milling cutter blade is adjusted to be superposed with the center line of a processed part, and then the height position of the disc saw blade milling cutter is adjusted; the highest point of the blade is aligned to the position of a product to be machined, the upper and lower sizes of the workbench are adjusted by a dial indicator for machining, after the first arc groove is machined, the workbench is lowered, the rear arc grooves are machined sequentially, and the milling reaches the size requirement shown in the figure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513150.8A CN111633253A (en) | 2020-06-08 | 2020-06-08 | Processing method for milling groove of round nut |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513150.8A CN111633253A (en) | 2020-06-08 | 2020-06-08 | Processing method for milling groove of round nut |
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| CN111633253A true CN111633253A (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010513150.8A Pending CN111633253A (en) | 2020-06-08 | 2020-06-08 | Processing method for milling groove of round nut |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953570A (en) * | 2021-11-26 | 2022-01-21 | 郑州亨睿精密机械科技有限公司 | Burr-free cutting process for heat dissipation bottom plate of power battery compartment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6052213A (en) * | 1983-08-29 | 1985-03-25 | Tekunoroole Kk | Engraving method of groove on roll circumferential surface |
| CN202461626U (en) * | 2012-03-14 | 2012-10-03 | 惠州智科实业有限公司 | Device for machining angle R |
| CN105522225A (en) * | 2015-11-12 | 2016-04-27 | 陕西一品达石化有限公司 | Big-modulus long rack machining method |
| CN107442828A (en) * | 2017-08-11 | 2017-12-08 | 广西汽车集团有限公司 | Arc groove processing technology |
| CN110142446A (en) * | 2019-05-28 | 2019-08-20 | 南京信息职业技术学院 | The milling mounting tool of arc groove |
-
2020
- 2020-06-08 CN CN202010513150.8A patent/CN111633253A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6052213A (en) * | 1983-08-29 | 1985-03-25 | Tekunoroole Kk | Engraving method of groove on roll circumferential surface |
| CN202461626U (en) * | 2012-03-14 | 2012-10-03 | 惠州智科实业有限公司 | Device for machining angle R |
| CN105522225A (en) * | 2015-11-12 | 2016-04-27 | 陕西一品达石化有限公司 | Big-modulus long rack machining method |
| CN107442828A (en) * | 2017-08-11 | 2017-12-08 | 广西汽车集团有限公司 | Arc groove processing technology |
| CN110142446A (en) * | 2019-05-28 | 2019-08-20 | 南京信息职业技术学院 | The milling mounting tool of arc groove |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953570A (en) * | 2021-11-26 | 2022-01-21 | 郑州亨睿精密机械科技有限公司 | Burr-free cutting process for heat dissipation bottom plate of power battery compartment |
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Application publication date: 20200908 |
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