CN116117441A - Processing method of inner hole smooth arc empty cutter groove - Google Patents
Processing method of inner hole smooth arc empty cutter groove Download PDFInfo
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- CN116117441A CN116117441A CN202211543585.2A CN202211543585A CN116117441A CN 116117441 A CN116117441 A CN 116117441A CN 202211543585 A CN202211543585 A CN 202211543585A CN 116117441 A CN116117441 A CN 116117441A
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- Prior art keywords
- inner hole
- area
- workpiece
- cutter groove
- circular arc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The invention discloses a processing method of an inner hole smooth arc empty knife groove, which comprises the steps of determining the reverse deformation of the inner hole according to the depth requirement of the empty knife groove; and applying a pretightening force on the excircle of the blank slot area of the milling shaft inner hole to uniformly shrink the area to a specified value. The circular arc empty cutter groove with the surface roughness reaching more than Ra0.8 can be processed in the inner hole of the milling shaft.
Description
Technical Field
The invention belongs to the field of heavy numerical control boring machines, and particularly relates to a processing method of an inner hole smooth circular arc empty cutter groove.
Background
The high speed of the heavy numerical control boring machine has become a necessary development trend. An important factor limiting the rotation speed of the spindle is that the heat productivity of the bearing part is large during high-speed operation, so that the milling shaft is easy to deform due to heating, and the boring shaft is locked and cannot stretch normally. In order to eliminate the influence of thermal deformation on the high-speed running of the milling shaft, a smooth transition arc blank groove needs to be added in an inner hole area of a heated part of the milling shaft, and the surface roughness needs to be more than Ra0.8.
The common processing method of the circular arc-shaped empty cutter groove is to program and turn by a numerical control lathe. The processing method can meet the requirement of the circular arc profile of the empty cutter groove, but the surface roughness can not reach more than Ra0.8, and an effective processing method is lacked.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a processing method of an inner hole smooth circular arc empty cutter groove, which can process the circular arc empty cutter groove with the surface roughness reaching more than Ra0.8 in the inner hole of a milling shaft.
In order to achieve the above purpose, the invention adopts the following technical scheme: a processing method of an inner hole smooth arc empty cutter groove comprises the following steps:
(1) Determining the reverse deformation of the inner hole according to the depth requirement of the empty cutter groove;
(2) Applying a pretightening force on the excircle of the blank slot area of the milling shaft inner hole to uniformly shrink the area to a specified value;
(3) Performing precise grinding processing on the inner hole of the pre-tightening part, and correcting the micro deformation of the inner hole;
(4) And (3) unloading the pretightening force applied in the step (2), and forming a smooth transition arc empty cutter groove after the inner hole is reversely deformed.
In the above technical scheme, in step 1, the diameter sizes of the inner hole and the outer circle of the pre-tightening area are measured first.
In the above technical scheme, in step 2, an expansion sleeve is arranged outside the hollow cutter groove area of the milling shaft inner hole, and the pretightening force is applied through the expansion sleeve.
In the technical scheme, before the expansion sleeve is installed, a layer of lubricating oil is smeared on the area so as to protect the outer circle surface of the workpiece.
In the above technical scheme, in step 3, before performing precision grinding processing on the inner hole of the pre-tightening part, the workpiece is placed for several hours, and the state of the workpiece is stabilized.
In the above technical scheme, in step 4, after the pretightening force is removed, the workpiece is placed for several hours, and the size of the empty tool groove area of the inner hole is measured after the workpiece state is stabilized.
The beneficial effects of the invention are as follows: by utilizing the processing method of the smooth circular arc empty cutter groove, through the reverse deformation processing technology, the circular arc empty cutter groove with the surface roughness reaching more than Ra0.8 can be processed in the inner hole of the milling shaft, and the technical problem that the boring shaft of the high-speed numerical control boring machine is locked by the milling shaft is solved.
Drawings
FIG. 1 is a schematic diagram of a milling shaft inner hole arc clearance groove structure and surface roughness requirements in the invention;
FIG. 2 is a schematic diagram of the present invention for applying a preload to the outer circumference of an arcuate pocket region;
FIG. 3 is a schematic illustration of the grinding of the reverse deformation zone of the inner bore in the present invention;
fig. 4 is a schematic diagram of a smooth transition clearance groove formed by reverse deformation of an inner hole after the inner hole is ground and then the pretightening force is removed.
Wherein: 1. the circular arc blank tool groove area, the expansion sleeve, the internal grinding round rod and the milling shaft.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples.
FIG. 1 shows the structure and the surface roughness requirement of an arc blank groove of an inner hole of a milling shaft.
A processing method of an inner hole smooth arc empty cutter groove comprises the following steps:
(1) Determining the reverse deformation of the inner hole according to the depth requirement of the empty cutter groove;
(2) As shown in fig. 2, an expansion sleeve is arranged on the outer circle of a blank slot area of an inner hole of a milling shaft, screws distributed on the circumference of the expansion sleeve are screwed, the expansion sleeve is uniformly screwed according to the principle of diagonal angle and intersection during screwing, the vertical condition of the outer ring end surface of the expansion sleeve and the outer circle of a workpiece is checked by a square during screwing, the vertical condition of the outer ring end surface of the expansion sleeve and the outer circle of the workpiece is timely adjusted, the vertical condition of the outer ring end surface of the expansion sleeve and the outer circle of the workpiece is ensured, the dimensional change condition of the inner hole in all directions of a pre-tightening position is measured during screwing, the uniform shrinkage of the inner hole in all directions is ensured, and pre-tightening is stopped after the dimensional shrinkage of the inner hole reaches a specified value;
(3) Placing the workpiece for a plurality of hours, stabilizing the state of the workpiece, and performing precise grinding processing on the inner hole of the pre-tightening part as shown in figure 3, and correcting the micro deformation of the inner hole of the pre-tightening part;
(4) As shown in fig. 4, the pretightening force applied in the step 2 is removed, and the inner hole is deformed reversely to form a smooth transition arc empty tool groove, which is specifically as follows:
1) After the inner hole of the pre-tightening part is corrected, the expansion sleeve is disassembled, the pre-tightening force is removed, all screws are loosened diagonally during the disassembly, and the expansion sleeve can be disassembled after the expansion sleeve is loosened.
2) And placing the workpiece for several hours, and measuring the corresponding size and the surface roughness value of the arc blank groove of the reverse deformation area after the state is stable.
In the above technical scheme, in step 1, the diameter sizes of the inner hole and the outer circle of the pre-tightening area are measured first.
In the technical scheme, before the expansion sleeve is installed, a layer of lubricating oil is smeared on the area so as to protect the outer circle surface of the workpiece.
In the above technical scheme, in step 3, before performing precision grinding processing on the inner hole of the pre-tightening part, the workpiece is placed for several hours, and the state of the workpiece is stabilized.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (6)
1. A processing method of an inner hole smooth arc empty cutter groove is characterized by comprising the following steps: the method comprises the following steps:
(1) Determining the reverse deformation of the inner hole according to the depth requirement of the empty cutter groove;
(2) Applying a pretightening force on the excircle of the blank slot area of the milling shaft inner hole to uniformly shrink the area to a specified value;
(3) Performing precise grinding processing on the inner hole of the pre-tightening part, and correcting the micro deformation of the inner hole;
(4) And (3) unloading the pretightening force applied in the step (2), and forming a smooth transition arc empty cutter groove after the inner hole is reversely deformed.
2. The method for processing the smooth circular arc empty slot of the inner hole according to claim 1, which is characterized in that: in the step 1, the diameter sizes of the inner hole and the outer circle of the pre-tightening area are measured firstly.
3. The method for processing the smooth circular arc empty slot of the inner hole according to claim 1, which is characterized in that: in the step 2, an expansion sleeve is arranged outside the blank groove area of the milling shaft inner hole, and pretightening force is applied through the expansion sleeve.
4. The method for machining the smooth circular arc empty slot of the inner hole according to claim 3, wherein the method comprises the following steps: before the expansion sleeve is installed, a layer of lubricating oil is smeared on the area so as to protect the outer circle surface of the workpiece.
5. The method for processing the smooth circular arc empty slot of the inner hole according to claim 1, which is characterized in that: in the step 3, before the inner hole of the pre-tightening part is precisely ground, the workpiece is placed for a plurality of hours, and the state of the workpiece is stabilized.
6. The method for processing the smooth circular arc empty slot of the inner hole according to claim 1, which is characterized in that: and 4, after the pretightening force is removed, placing the workpiece for a plurality of hours, and measuring the size of the empty cutter groove area of the inner hole after the workpiece is stabilized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211543585.2A CN116117441A (en) | 2022-12-03 | 2022-12-03 | Processing method of inner hole smooth arc empty cutter groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211543585.2A CN116117441A (en) | 2022-12-03 | 2022-12-03 | Processing method of inner hole smooth arc empty cutter groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116117441A true CN116117441A (en) | 2023-05-16 |
Family
ID=86294682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211543585.2A Pending CN116117441A (en) | 2022-12-03 | 2022-12-03 | Processing method of inner hole smooth arc empty cutter groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116117441A (en) |
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2022
- 2022-12-03 CN CN202211543585.2A patent/CN116117441A/en active Pending
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