CN112916971B - Compensation method for taper cutting for linear cutting machining - Google Patents
Compensation method for taper cutting for linear cutting machining Download PDFInfo
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- CN112916971B CN112916971B CN202110088100.4A CN202110088100A CN112916971B CN 112916971 B CN112916971 B CN 112916971B CN 202110088100 A CN202110088100 A CN 202110088100A CN 112916971 B CN112916971 B CN 112916971B
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- guide wheel
- molybdenum wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
Abstract
The invention discloses a compensation method of taper cutting for linear cutting processing, when a U shaft and a V shaft move to enable a molybdenum wire to form a target angle, at the moment, the position of a tangent point of the molybdenum wire on an upper guide wheel and a lower guide wheel changes, so that the overall position height of the molybdenum wire also changes, and the larger the angle is, the larger the change is; the tangent point of the molybdenum wire and the guide wheel is constantly changed in the process of pulling the angle, so that the contact position of the molybdenum wire and the workpiece is changed, compensation is required to be introduced, and the compensation is on the Y axis; according to the invention, through comparison and measurement of multiple taper cutting, the compensation method is found to be capable of well solving the problems of overlarge size deviation, non-straight line, mold position deviation and the like in large taper cutting, is an effective method, and is completely suitable for linear cutting taper cutting.
Description
Technical Field
The invention relates to the field of linear cutting, in particular to a compensation method for taper cutting for linear cutting machining.
Background
With the expansion of industrial production scale and the development of manufacturing technology, the wire cutting technology is one of special processing technologies, and is widely applied to mechanical processing production by virtue of the characteristics of high processing precision, high production efficiency, low power consumption, low manufacturing cost and the like. Particularly in the die machining industry, the wire cut electrical discharge machining technology is widely applied to cold punching die and extrusion die machining, changes the machining mode of using a split die and curve grinding in the past, shortens the manufacturing period, reduces the manufacturing cost and has high matching precision.
Wire electric discharge machining is sometimes called wire cutting. The basic working principle is to use continuously moving fine metal wire (called electrode wire) as electrode to perform pulse spark discharge to remove metal and cut and shape the workpiece.
The wire cut electrical discharge machining technology is one of special machining, and is different from the traditional machining technology that mechanical force and mechanical energy are needed for cutting, and the machining of materials is mainly realized by utilizing electric energy. Therefore, the wire electric discharge machining technique is not limited by material properties, and can machine materials of any hardness, strength and brittleness, and is an important position in the current machining.
Disclosure of Invention
The invention aims to provide a taper cutting compensation method for linear cutting processing, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a compensation method of taper cutting for linear cutting processing,
when the U-axis and the V-axis move to enable the molybdenum wire to form a target angle, the overall position height of the molybdenum wire is changed due to the change of the tangent point positions of the molybdenum wire on the upper guide wheel and the lower guide wheel, and the larger the angle is, the larger the change is;
when U =0, V =0, namely the U axis is not angular, the V axis is not angular;
at the moment, when the molybdenum wire is vertical, the tangent points of the upper guide wheel, the lower guide wheel and the molybdenum wire are all on the central horizontal line of the guide wheels, and the vertical height of the tangent points of the upper guide wheel and the lower guide wheel is considered to be H;
when U is not equal to 0, V is not equal to 0, namely the U axis has an angle, and the V axis has no angle;
at the moment, when the U shaft moves, the upper guide wheel and the lower guide wheel rotate according to the angle change of the molybdenum wire, so that the tangent points of the guide wheel and the molybdenum wire are always kept on the horizontal central line of the guide wheel, and at the moment, the vertical heights of the tangent points of the upper guide wheel and the lower guide wheel are kept unchanged;
when U =0,V is not equal to 0, namely the U axis has no angle, and the V axis has an angle;
at the moment, when only the V shaft moves, the positions of the tangent points of the upper guide wheel, the lower guide wheel and the molybdenum wire are changed;
when V-is needed, the tangent point of the guide wheel and the molybdenum wire is below the horizontal center line of the guide wheel, and the actual position of the molybdenum wire is parallel offset to the outer side of the guide wheel compared with the position when the molybdenum wire is vertical, so the offset needs to be compensated in the Y axis;
v-time, parallel offset distance:
when V + is reached, the tangent point of the guide wheel and the molybdenum wire is above the horizontal central line of the guide wheel, and the actual position of the molybdenum wire is parallel offset to the outer side of the guide wheel compared with the position when the molybdenum wire is vertical, and the offset needs to be compensated in the Y axis;
v +, parallel offset distance:
when U is not equal to 0,V is not equal to 0, namely the U axis has an angle, and the V axis has an angle;
taking U-direction and V-direction as an example, when the V-axis moves in the negative direction, the tangent point positions of the upper guide wheel, the lower guide wheel and the molybdenum wire will deviate below the horizontal center line of the guide wheel,
offset vertical height: hv = R · SIN (α);
at the moment, when the U-axis moves in the negative direction, the position of a tangent point of the guide wheel and the molybdenum wire is not changed on the guide wheel, but the guide wheel rotates according to the angle change of the molybdenum wire, the horizontal height of the tangent point is deviated upwards,
hu = hv-hv · cos (β), the deviations caused by hu still need to be compensated in the Y axis;
in summary, the tangent point of the molybdenum wire to the guide wheel is constantly changed during the process of drawing the angle, thereby causing the contact position of the molybdenum wire and the workpiece to be changed, and compensation needs to be introduced, wherein the compensation is on the Y axis.
Compared with the prior art, the invention has the beneficial effects that:
through comparison and measurement of multiple taper cutting, the compensation method is found to be an effective method, and is completely suitable for taper cutting of linear cutting.
Drawings
FIG. 1 is a schematic view of the upper idler offset on the U and V axes.
Fig. 2 is a schematic view of the angle change with the height position of the upper guide wheel unchanged.
FIG. 3 is a schematic view of the change in position of the upper idler with a constant target angle.
FIG. 4 is a schematic view of a molybdenum wire with no U-axis angle and no V-axis angle.
FIG. 5 is a schematic view of a molybdenum wire with an angle on the U-axis and no angle on the V-axis.
FIG. 6 is a schematic view of a U-axis non-angled molybdenum wire with an angled V-axis.
FIG. 7 is a schematic view of a molybdenum wire with an angle in the U-axis and an angle in the V-axis.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
During taper cutting, the upper part of the molybdenum wire bypasses the upper guide wheel, the lower part of the molybdenum wire bypasses the lower guide wheel, the left and right direction of the molybdenum wire is defined as an X axis, the front and back direction of the molybdenum wire is defined as a Y axis, the horizontal direction of the upper guide wheel and the X axis is defined as a U axis, and the horizontal direction of the upper guide wheel and the Y axis is defined as a V axis; in actual equipment, the lower guide wheel only rotates and does not move in position, the upper guide wheel can move in the directions of the U shaft and the V shaft, and the molybdenum wire is inclined to a target angle through the movement of the upper guide wheel in the U shaft and the V shaft to finish machining;
as shown in fig. 1, the movement of the upper guide wheel in the U-axis determines the angle in the X-axis direction, and the movement of the upper guide wheel in the V-axis determines the angle in the Y-axis direction;
the moving distance of the upper guide wheel on the U shaft and the V shaft depends on the size of the target angle and the height of the upper guide wheel and the lower guide wheel; the position of the lower guide wheel is fixed, so that the height of the upper guide wheel and the height of the lower guide wheel are the position height of the upper guide wheel;
as shown in fig. 2, under the condition that the height position of the upper guide wheel is not changed, the larger the target angle is, the larger the moving distance of the upper guide wheel on the U-axis and the V-axis is;
as shown in fig. 3, in the case that the target angle is not changed, the higher the position of the upper guide wheel is, the larger the moving distance of the upper guide wheel on the U-axis and the V-axis is;
a compensation method of taper cutting for linear cutting processing,
when the U-axis and the V-axis move to enable the molybdenum wire to form a target angle, the overall position height of the molybdenum wire is changed due to the change of the tangent point positions of the molybdenum wire on the upper guide wheel and the lower guide wheel, and the larger the angle is, the larger the change is;
as shown in fig. 4, when U =0, V =0, i.e., the U axis is not angled, the V axis is not angled;
at the moment, when the molybdenum wire is vertical, the tangent points of the upper guide wheel, the lower guide wheel and the molybdenum wire are all on the central horizontal line of the guide wheels, and the vertical height of the tangent points of the upper guide wheel and the lower guide wheel is considered to be H;
as shown in fig. 5, when U ≠ 0, V =0, i.e. the U axis has an angle, the V axis has no angle;
at the moment, when the U shaft moves, the upper guide wheel and the lower guide wheel rotate according to the angle change of the molybdenum wire, so that the tangent points of the guide wheel and the molybdenum wire are always kept on the horizontal central line of the guide wheel, and at the moment, the vertical heights of the tangent points of the upper guide wheel and the lower guide wheel are kept unchanged;
as shown in fig. 6, when U =0,V ≠ 0, i.e. the U-axis is not angled, the V-axis is angled;
at the moment, when only the V shaft moves, the positions of tangent points of the upper guide wheel, the lower guide wheel and the molybdenum wire are changed;
v-time, the tangent point of the guide wheel and the molybdenum wire is below the horizontal center line of the guide wheel, and the actual position of the molybdenum wire is parallel offset to the outer side of the guide wheel compared with the molybdenum wire in the vertical state, so that the offset needs to be compensated in the Y axis;
v-time, parallel offset distance:
when V + is reached, the tangent point of the guide wheel and the molybdenum wire is above the horizontal central line of the guide wheel, and the actual position of the molybdenum wire is parallel offset to the outer side of the guide wheel compared with the position when the molybdenum wire is vertical, and the offset needs to be compensated in the Y axis;
v +, parallel offset distance:
as shown in FIG. 7, when U ≠ 0,V ≠ 0, i.e. the U-axis has an angle and the V-axis has an angle;
taking U-direction and V-direction as an example, when the V-axis moves in the negative direction, the tangent point positions of the upper guide wheel, the lower guide wheel and the molybdenum wire will deviate below the horizontal center line of the guide wheel,
offset vertical height: hv = R · SIN (α);
at the moment, when the U-axis moves in the negative direction, the position of a tangent point of the guide wheel and the molybdenum wire is not changed on the guide wheel, but the guide wheel rotates according to the angle change of the molybdenum wire, the horizontal height of the tangent point is deviated upwards,
hu = hv-hv · cos (β), the deviations caused by hu still need to be compensated in the Y axis;
in summary, the tangent point of the molybdenum wire to the guide wheel is constantly changed during the process of drawing the angle, thereby causing the contact position of the molybdenum wire and the workpiece to be changed, and compensation needs to be introduced, wherein the compensation is on the Y axis.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (1)
1. A compensation method for taper cutting for linear cutting machining is characterized in that when a U shaft and a V shaft move to enable a molybdenum wire to form a target angle, the position of a tangent point of the molybdenum wire on an upper guide wheel and a lower guide wheel changes, so that the overall position height of the molybdenum wire also changes, and the larger the angle is, the larger the change is;
when U =0, V =0, namely the U axis is not angular, the V axis is not angular;
at the moment, when the molybdenum wire is vertical, the tangent points of the upper guide wheel, the lower guide wheel and the molybdenum wire are all on the central horizontal line of the guide wheels, and at the moment, the vertical height of the tangent points of the upper guide wheel and the lower guide wheel is considered to be H;
when U is not equal to 0, V is not equal to 0, namely the U axis has an angle, and the V axis has no angle;
at the moment, when the U shaft moves, the upper guide wheel and the lower guide wheel rotate according to the angle change of the molybdenum wire, so that the tangent points of the guide wheel and the molybdenum wire are always kept on the horizontal central line of the guide wheel, and at the moment, the vertical heights of the tangent points of the upper guide wheel and the lower guide wheel are kept unchanged;
when U =0,V is not equal to 0, namely the U axis has no angle, and the V axis has an angle;
at the moment, when only the V shaft moves, the positions of the tangent points of the upper guide wheel, the lower guide wheel and the molybdenum wire are changed;
v-time, the tangent point of the guide wheel and the molybdenum wire is below the horizontal center line of the guide wheel, and the actual position of the molybdenum wire is parallel offset to the outer side of the guide wheel compared with the molybdenum wire in the vertical state, so that the offset needs to be compensated in the Y axis;
v-time, parallel offset distance:
when V + is reached, the tangent point of the guide wheel and the molybdenum wire is above the horizontal central line of the guide wheel, and the actual position of the molybdenum wire is parallel offset to the outer side of the guide wheel compared with the position when the molybdenum wire is vertical, and the offset needs to be compensated in the Y axis;
v +, parallel offset distance:
when U is not equal to 0,V is not equal to 0, namely the U axis has an angle, and the V axis has an angle;
taking U-direction and V-direction as an example, when the V-axis moves in the negative direction, the tangent point positions of the upper guide wheel, the lower guide wheel and the molybdenum wire will deviate below the horizontal center line of the guide wheel,
offset vertical height: hv = R · SIN (α);
at the moment, when the U-axis moves in the negative direction, the position of a tangent point of the guide wheel and the molybdenum wire is not changed on the guide wheel, but the guide wheel rotates according to the angle change of the molybdenum wire, the horizontal height of the tangent point is deviated upwards,
hu = hv-hv · cos (β), the deviations caused by hu still need to be compensated in the Y-axis;
the tangent point of the molybdenum wire and the guide wheel is continuously changed in the process of drawing the angle, so that the contact position of the molybdenum wire and the workpiece is changed, and compensation is required to be introduced, wherein the compensation is on the Y axis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110088100.4A CN112916971B (en) | 2021-01-22 | 2021-01-22 | Compensation method for taper cutting for linear cutting machining |
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| CN202110088100.4A CN112916971B (en) | 2021-01-22 | 2021-01-22 | Compensation method for taper cutting for linear cutting machining |
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| CN112916971A CN112916971A (en) | 2021-06-08 |
| CN112916971B true CN112916971B (en) | 2022-12-16 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202070U (en) * | 1985-05-31 | 1986-03-19 | 国营长风机械总厂 | Large-taper cutting device for eletric spark linear cutting lathe |
| CN2286438Y (en) * | 1997-02-19 | 1998-07-22 | 孙银焕 | Tumbling rod type taper line frame structure of linear cutting machine |
| CN200942448Y (en) * | 2006-08-23 | 2007-09-05 | 杭州杭机数控机床有限公司 | Large taper large thickness wire frame device for wire cutting |
| CN203649587U (en) * | 2013-10-21 | 2014-06-18 | 南京航空航天大学 | Intercutting-error-free big-tapered follow-up wire guiding and water spraying mechanism for wire-cut electric discharge machine |
| CN105522241B (en) * | 2016-02-03 | 2017-07-18 | 浙江三奇机械设备有限公司 | Taper line cutting electrode filament length degree compensation mechanism and control method |
| CN110202227A (en) * | 2019-07-01 | 2019-09-06 | 泰州市晨虹数控设备制造有限公司 | A kind of zero offset formula taper wire cutting machine tool |
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