CN117381115A - Cutting method for improving in-hole cutting quality - Google Patents
Cutting method for improving in-hole cutting quality Download PDFInfo
- Publication number
- CN117381115A CN117381115A CN202311382343.4A CN202311382343A CN117381115A CN 117381115 A CN117381115 A CN 117381115A CN 202311382343 A CN202311382343 A CN 202311382343A CN 117381115 A CN117381115 A CN 117381115A
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- CN
- China
- Prior art keywords
- cutting
- hole
- improving
- intersection point
- instruction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005498 polishing Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
Abstract
The invention discloses a cutting method for improving in-hole cutting quality, which comprises the following steps: a cutting instruction generating step: generating a cutting instruction in a numerical control system of the plasma cutting machine, and adding setting information of gap bridge spacing in the cutting instruction to enable a cutting intersection point to be at a certain distance from the edge of the hole; cutting: according to the cutting instruction generated in the previous step, cutting by taking the cutting intersection point as the starting point and the ending point of the cutting track, and forming a convex part protruding out of the inner surface of the hole at the cutting intersection point after cutting is finished, wherein the distance between the two ends of the root part of the convex part is the gap bridge distance; polishing: the boss is removed. After twice melting of the plasma arc of the cutting head, the protruding part is basically melted, only a smaller part is remained, and after cutting, the hole can be polished to a smooth state only by slightly polishing the protruding part.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a cutting method for improving cutting quality in a hole in a plasma cutting process.
Background
In the process of cutting the hole by the plasma cutting machine, the start position point and the end position point of the cutting track are both positioned at the same position of the edge of the hole, and an intersection point is generated. The cutting machine cuts according to a pre-defined starting cutting point (start) and a cutting path in a cutting instruction, the cutting path transits from outside the part to the edge of the hole, a closed loop is formed through the same point (cutting intersection point) on the edge of the hole after cutting for one circle, and the cutting of the hole of one part is completed after finishing outside the part (end) in a symmetrical path.
Therefore, in the cutting process, because the cutting head is melted twice at the cutting intersection point, the excessive burning is caused by improper control, a notch is formed on the part, repair welding and polishing are needed when the part is light, and the part is wasted when the part is heavy.
Disclosure of Invention
The invention aims to provide a cutting method for improving in-hole cutting quality so as to solve the problems in the prior art.
The purpose of the invention is realized in the following way: a cutting method for improving the quality of in-hole cutting, which performs an operation of cutting holes in a steel plate using a plasma cutter in the process of performing the method, comprising the steps of:
a cutting instruction generating step: generating a cutting instruction in a numerical control system of the plasma cutting machine, and adding setting information of gap bridge spacing in the cutting instruction to enable a cutting intersection point to be at a certain distance from the edge of the hole;
cutting: according to the cutting instruction generated in the previous step, cutting by taking the cutting intersection point as the starting point and the ending point of the cutting track, and forming a convex part protruding out of the inner surface of the hole at the cutting intersection point after cutting is finished, wherein the distance between the two ends of the root part of the convex part is the gap bridge distance;
polishing: the boss is removed.
The invention has the beneficial effects that:
after twice melting of the plasma arc of the cutting head, the protruding part is basically melted, only a smaller part is left, and after cutting is finished, the hole can be polished to a smooth state only by slightly polishing the protruding part, so that the overburning phenomenon is prevented, and a notch is prevented from being generated in the hole, so that the requirement of cutting precision is met.
Drawings
Fig. 1 is a schematic view of the process principle of the present invention.
Fig. 2 is an illustration of an application example for circular cut holes.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Detailed Description
The invention will be further described with reference to figures 1-3 and the specific examples.
As shown in fig. 1 to 3, a cutting method for improving the cutting quality in a hole is performed by using a plasma cutting machine to cut a hole in a steel plate, and the shape of the hole 1 is not limited, and the present embodiment is described in detail by taking a round hole as an example.
The cutting method comprises the following steps:
a cutting instruction generating step: generating a cutting instruction (namely determining a movement track of a cutting head) in a numerical control system of the plasma cutting machine, and adding setting information of a gap distance 3 in the cutting instruction to enable a cutting intersection point 2 to be at a certain distance from the edge of a hole 1 (as long as the cutting intersection point is not burnt through, a notch is not formed at the edge of the hole 1, the cutting instruction can be 1.5-3mm, and the specific size is determined according to specific equipment);
cutting: according to the cutting instruction generated in the previous step, taking the cutting intersection point 2 as a starting point and an ending point of a cutting track, executing a cutting action, and after the cutting is finished, forming a protruding part 11 protruding out of the inner surface of the hole 1 at the cutting intersection point 2, wherein the distance between the two ends of the root part of the protruding part 11 is a gap bridge distance 3;
polishing: the boss 11 is removed.
The height of the projections 11 (distance of the cutting intersection 2 from the edge of the hole 1) depends on the bridge distance 3. In the process of determining the size of the gap bridge 3, according to the specific model of the plasma cutting machine, multiple trial cutting operations are performed to determine the proper size value of the gap bridge 3, and then setting information of the gap bridge 3 is added in a cutting instruction. After the test of the cutting machine, the size parameter of the interval 3 is determined, so that the cutting precision requirement is met.
In the polishing step, the raised portion 11 is polished off with a hand-held polisher to smooth the edge of the hole 1. An automated device for automatically grinding the edges of the holes 1 may also be used.
In order to facilitate the smooth process, the two sides of the protruding portion 11 conform to the cutting track, and the cutting intersection 2 is the highest point of the protruding portion 11 and is the intersection of the two sides of the protruding portion 11.
As shown in fig. 3, in an ideal state, two sides of the boss 11 are concave arc-shaped sides, namely a start side 11a and a stop side 11b, respectively, the cutting intersection point 2 is an intersection point of the start side 11a and the stop side 11b, a distance between an end point of the start side 11a and a start point of the stop side 11b is a gap bridge distance 3, and the start side 11a and the stop side 11b both conform to a cutting track, so that the cutting intersection point 2 and an edge of the hole 1 are in smooth transition.
The specific shape of the boss 11 may be unlimited, and a solution with good results is proposed in this patent.
In the actual state, a bulge 11 is formed at the cutting intersection point 2, after twice melting of the plasma arc of the cutting head, the bulge 11 is basically melted, only a smaller part is remained, and after the cutting is finished, the hole 1 can be polished to a smooth state only by slightly polishing the position of the bulge 11.
The foregoing is a preferred embodiment of the present invention, and various changes and modifications may be made therein by those skilled in the art without departing from the general inventive concept, and such changes and modifications should be considered as falling within the scope of the present invention as defined in the appended claims.
Claims (6)
1. A cutting method for improving the quality of in-hole cutting, which performs an operation of cutting holes in a steel plate using a plasma cutter in the process of performing the method, characterized by comprising the steps of:
a cutting instruction generating step: generating a cutting instruction in a numerical control system of the plasma cutting machine, and adding setting information of the gap bridge distance (3) into the cutting instruction to enable a cutting intersection point (2) to be at a certain distance from the edge of the hole (1);
cutting: according to the cutting instruction generated in the previous step, taking the cutting intersection point (2) as a starting point and an ending point of a cutting track, executing cutting action, and forming a convex part (11) protruding out of the inner surface of the hole (1) at the cutting intersection point (2) after cutting is finished, wherein the distance between two ends of the root of the convex part (11) is a gap bridge distance (3);
polishing: the boss (11) is removed.
2. The cutting method for improving in-hole cutting quality according to claim 1, wherein: the height of the protruding part (11) depends on the gap bridge distance (3).
3. The cutting method for improving in-hole cutting quality according to claim 1, wherein: in the polishing step, the raised portion (11) is removed by polishing with a hand-held polisher to smooth the edge of the hole (1).
4. The cutting method for improving in-hole cutting quality according to claim 2, wherein: both sides of the bulge (11) conform to the cutting track.
5. The cutting method for improving in-hole cutting quality according to claim 2, wherein: the cutting intersection point (2) is the highest point of the protruding part (11), and is the intersection point of two sides of the protruding part (11).
6. The cutting method for improving in-hole cutting quality according to claim 2, wherein: in determining the size of the gap bridge spacing (3), a plurality of trial cutting operations are performed according to the specific model of the plasma cutting machine to determine a suitable size value of the gap bridge spacing (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311382343.4A CN117381115A (en) | 2023-10-24 | 2023-10-24 | Cutting method for improving in-hole cutting quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311382343.4A CN117381115A (en) | 2023-10-24 | 2023-10-24 | Cutting method for improving in-hole cutting quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117381115A true CN117381115A (en) | 2024-01-12 |
Family
ID=89468046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311382343.4A Pending CN117381115A (en) | 2023-10-24 | 2023-10-24 | Cutting method for improving in-hole cutting quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117381115A (en) |
-
2023
- 2023-10-24 CN CN202311382343.4A patent/CN117381115A/en active Pending
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