CN112589531B - Numerical control machining tool setting method for middle profiling tool - Google Patents
Numerical control machining tool setting method for middle profiling tool Download PDFInfo
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- CN112589531B CN112589531B CN202011219525.6A CN202011219525A CN112589531B CN 112589531 B CN112589531 B CN 112589531B CN 202011219525 A CN202011219525 A CN 202011219525A CN 112589531 B CN112589531 B CN 112589531B
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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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
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Abstract
The invention relates to a numerical control machining tool setting method of a middle profiling cutter, which directly calculates the actual installation angle of the cutter by a method of trial cutting slope at two points in the tool setting process, and then calculates the tool setting measurement value of the cutter in the symmetrical direction through the slope; the tool setting device is simple, convenient and quick, the tool setting precision is improved qualitatively, and a theoretical basis is provided for machining high-precision parts.
Description
Technical Field
The invention belongs to the field of numerical control turning, and particularly relates to a tool setting method for numerical control machining of a middle profiling tool.
Background
The middle profiling cutter is widely applied to numerical control turning, and is irreplaceable particularly for processing of special profile surfaces. However, compared with the offset cutter, due to the particularity of the geometric profile, the cutter setting in the direction of the symmetrical center of the cutting edge is difficult, and the cutter setting precision is low. This in turn affects its use to some extent, particularly for some precision-sized machining. How to improve the tool setting precision of the middle profiling lathe tool is an important subject in the field of numerical control turning.
Disclosure of Invention
The invention aims to solve the technical problem of providing a numerical control machining tool setting method for a middle profiling tool, which is simple, convenient and quick to set the tool and high in tool setting precision.
The technical scheme adopted by the invention is as follows:
a numerical control machining tool setting method for a middle profiling tool comprises the following steps:
correctly installing the cutter to the corresponding cutter position of the numerical control machine tool;
setting the cutter in the radial direction, and resetting the relative coordinate U to zero;
moving the cutter to feed along the U-direction shaft, and setting the depth U1 of the first U-direction trial cutter;
moving the W to feed to the shaft, trial cutting the end face for the first time, and resetting the relative coordinate W after contacting the end face;
moving the U-direction shaft to feed, and setting a second U-direction trial cutting tool depth U2;
moving the W to feed to the shaft, trial cutting the end face for the second time, and recording the current value of the W direction as C when the end face is just contacted;
calculating the actual mounting angle alpha of the tool:
calculating the length LA of the segment A:
calculating the length LB of the segment B:
LB＝tan(45°-α/2)×R ③
wherein R is the arc radius of the tool nose of the tool;
the final tool setting measurement value is LA + LB;
and carrying out tool setting according to the tool setting measurement value.
Further, before setting the tool setting for the tool, the end face and the outer circle of the workpiece are finish-turned by using a bias tool.
Further, a correction value Δ Z is added when calculating the tool setting measurement value so that Z becomes LA + LB + Δ Z.
The invention has the positive effects that: the invention calculates the actual installation angle of the cutter by using a two-point trial cut mode in the cutter setting process, and then calculates the cutter setting measurement value of the cutter in the symmetrical direction. The tool setting device is simple, convenient and quick, the tool setting precision is improved qualitatively, and a theoretical basis is provided for machining high-precision parts.
Drawings
FIG. 1 is a schematic diagram of the present invention;
fig. 2-6 are data record diagrams in the tool setting process according to the embodiment of the invention.
Detailed Description
As shown in fig. 1, which is a schematic diagram of the present invention, in the actual tool setting process, a workpiece is in a fixed state, and tool setting is performed by using a moving tool, wherein the diagram is a diagram of two contact positions of the workpiece and the tool.
The invention comprises the following steps:
s1: and (4) correctly installing the cutter to the corresponding cutter position of the numerical control machine tool.
S2: and (5) finely turning the end face and the outer circle of the workpiece by using a bias cutter.
S3: and setting the cutter in the radial direction, and resetting the relative coordinate U to zero.
S4: the tool moves U to the axis feed, giving a first U to trial tool depth U1.
S5: moving the W to feed to the shaft, trial cutting the end face for the first time, and resetting the relative coordinate W after contacting the end face.
S6: the U-axis feed is moved, giving a second U-axis trial cutting tool depth U2.
S7: moving W to feed axially, trial cutting the end face for the second time, and recording the current value of W when the end face is just contacted, and recording the current value as C.
S8: calculating the actual mounting angle alpha of the tool:
calculating the length LA of the segment A:
calculating the length LB of the segment B:
LB＝tan(45°-α/2)×R ③
wherein R is the arc radius of the tool nose of the tool. The sum of the lengths of the line segment A and the line segment B is the tool setting measurement value, and the intersection point of the line segments A and B is on the extension line of the corresponding tool end face. And the line segment B is tangent to the tool nose arc of the middle copying tool, so that the angle beta is 45-alpha/2.
The final tool setting measurement value Z is LA + LB; in the actual operation process, the movement error of the cutter in the trial cutting end face is considered, a correction value delta Z is added, Z is LA + LB + delta Z, delta Z is an empirical value, the value range is 0.001-0.01, and the method can be flexibly mastered according to specific conditions.
S9: and carrying out tool setting according to the tool setting measurement value.
The method directly calculates the actual installation angle of the cutter by a 'two-point' trial cut slope method in the cutter setting process. And then calculating the tool setting measurement value of the tool in the symmetrical direction through the slope. Compared with the existing tool setting method, the method has the advantage that the precision is greatly improved.
The process of the invention is illustrated below with reference to specific examples:
in the present embodiment, the cutting edge arc radius R of the center copying tool is 0.4.
S1: and (4) correctly installing the cutter to the corresponding cutter position of the numerical control machine tool.
S2: and (5) finely turning the end face and the outer circle of the workpiece by using a bias cutter.
S3: and setting the cutter in a radial direction, and resetting the relative coordinate U to zero, as shown in the attached figure 2.
S4: moving the U-axis feed, given the first U-axis trial cutting depth, U1 is 10, as shown in fig. 3.
S5: and moving the W to feed the shaft, trial-cutting the end face for the first time, and using an X1 gear when the end face is to be trial-cut. After trial cutting to the end face, the relative coordinates W are cleared, as shown in fig. 4.
S6: the U-axis feed is moved, giving a second U-axis trial knife depth U2 of 20, as shown in fig. 5.
S7: moving W to feed to the shaft, trial cutting the end face for the second time, and using the X1 gear position when the end face is just to be trial cut, recording the current value of W, as shown in fig. 6, wherein C is 1.6.
S8: actual setting angle of the tool
Since the machine tool is set to be in a diameter working mode, the diameter working mode needs to be divided by 2 in the calculation process to carry out radius conversion.
Then
LB-rxtan (45 ° - α/2) ≈ 0.4 × tan36.1275 ° -0.292, and tool setting measurement Z-LA + LB + Δ Z-3.492 + Δ Z.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. A numerical control machining tool setting method for a middle profiling tool is characterized by comprising the following steps:
correctly installing the cutter to the corresponding cutter position of the numerical control machine tool;
setting the cutter in the radial direction, and resetting the relative coordinate U to zero;
moving the cutter to feed along the U-direction shaft, and setting the depth U1 of the first U-direction trial cutter;
moving the W to feed to the shaft, trial cutting the end face for the first time, and resetting the relative coordinate W after contacting the end face;
moving the U-direction shaft to feed, and setting a second U-direction trial cutting tool depth U2;
moving the W to feed to the shaft, trial cutting the end face for the second time, and recording the current value of the W direction as C when the end face is just contacted;
calculating the actual mounting angle alpha of the tool:
calculating the length LA of the segment A:
calculating the length LB of the segment B:
LB＝tan(45°-α/2)×R ③
wherein R is the arc radius of the tool nose of the tool;
the final tool setting measurement value Z is LA + LB;
and carrying out tool setting according to the tool setting measurement value.
2. The tool setting method for the numerical control machining of the middle profiling tool is characterized in that an end face and an outer circle of a workpiece are finish-turned by using an eccentric tool before the tool setting is carried out on the tool.
3. The tool setting method for the numerical control machining of the middle profiling tool according to claim 1, characterized in that a correction value Δ Z is added when tool setting measurement values are calculated, so that Z is LA + LB + Δ Z.
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5586479A (en) * | 1993-03-10 | 1996-12-24 | Eastman Kodak Company | Cutting apparatus for cutting an image from a receiving sheet |
| CN103611956B (en) * | 2013-10-17 | 2016-09-14 | 厦门金鹭特种合金有限公司 | A kind of profiling blade and use the cutting tool of this blade |
| CN104190963B (en) * | 2014-07-07 | 2016-06-08 | 昆明学院 | A kind of numerical control lathe adjusting tool device based on machine vision and presetting cutter method |
| CN106271875B (en) * | 2016-09-14 | 2018-08-07 | 西安航天动力测控技术研究所 | A kind of measuring block of fast run-up inclined-plane coordinate system |
| CN108942413B (en) * | 2018-08-28 | 2024-04-19 | 天津科技大学 | Non-contact accurate tool setting gauge and tool setting method for ultra-precise turning diamond tool |
| CN109396959B (en) * | 2018-11-19 | 2020-11-17 | 四川航天烽火伺服控制技术有限公司 | Method for machining grooves in 90-degree annular conical parting surface |
| CN111890122B (en) * | 2019-05-06 | 2022-02-08 | 四川大学 | On-machine detection and calculation method for initial phase of front tool face of cutter |
| CN110744354B (en) * | 2019-11-08 | 2021-06-15 | 大连理工大学 | Method for determining alternate time in material increasing and decreasing composite manufacturing |
| CN111702555B (en) * | 2020-06-02 | 2022-05-20 | 大连理工大学 | Device and method for precisely adjusting height of turning tool nose on machine |
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