CN113210776B - Linear cutting method for large ring forging - Google Patents
Linear cutting method for large ring forging Download PDFInfo
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- CN113210776B CN113210776B CN202110474835.0A CN202110474835A CN113210776B CN 113210776 B CN113210776 B CN 113210776B CN 202110474835 A CN202110474835 A CN 202110474835A CN 113210776 B CN113210776 B CN 113210776B
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- scribing
- ring forging
- template
- forging
- cutting
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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
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Forging (AREA)
Abstract
The invention discloses a linear cutting method of a large ring forging, which sequentially comprises the following steps: a. manufacturing a scribing template; b. manufacturing a scribing module; c. scribing; d. and (5) wire cutting. Compared with the prior art, the invention has the advantages that the corresponding scribing template and scribing module can be manufactured according to the cutting angle, then the scribing template and the scribing module are used for scribing and then wire cutting is carried out, the quality of the wire cutting surface is good, the subsequent machining is not needed, compared with the separate forging, the invention has high production efficiency, the material cost and the die cost are saved, in addition, the influence on the physical and chemical properties of the product is lower during the finish machining and cutting, and the performance difference of each section caused by the separate forging is avoided.
Description
Technical Field
The invention relates to a linear cutting method of a large ring forging piece, in particular to a linear cutting method for carrying out special angles on the large ring forging piece.
Background
With the continuous development of the social productivity level, various heavy and large-scale mechanical equipment such as bucket-wheel stacker-reclaimers, heading machines, large cranes, heavy machine tools and the like are continuously applied to the fields of energy sources, ports, mines, metallurgy, bridge tunneling, mechanical processing and the like. The mining or turning sections of these equipment often employ annular forgings of various cross-sectional shapes, such as annular rails, slewing bearings, and the like.
Due to the structural or assembly requirements, the annular forging is often divided into a plurality of sections, and the section angle is sometimes special, and the annular forging is generally produced by the following methods in industrial production:
1. firstly, each section is subjected to layout, a square plate with reasonable size is forged by a press according to the layout result, and then cutting processing is carried out; however, when the arc section is machined by adopting the method, the cutting amount is large, more materials are wasted, and the streamline of the forged square plate is damaged when the arc section is machined due to different curvatures of the streamline and the arc section, so that the physicochemical properties of the product, in particular the mechanical properties of the product, are affected;
2. forging the blank into a strip with a proper section, bending the strip into an arc according to the curvature of a product, and then milling; however, the arc section is processed by adopting the method, so that the cutting amount is large, the time for bending the arc is long, a die is needed, and the cost is high;
3. an annular forging with curvature meeting the requirement is rolled, sawed into arc sections with proper length on a common sawing machine, and then spliced, processed and milled to form two angled ends. The arc section is processed by the method, and the sawing machine cannot be adjusted to a special angle, so that a larger allowance is also required to be reserved in the wall thickness direction of the ring forging piece so as to ensure that a needed shape can be milled after sawing.
The problems of material waste, low production efficiency, high requirements on machining equipment and large influence on product performance exist in the production mode, so that a method which is easy to operate and low in equipment requirements needs to be found.
Disclosure of Invention
The invention aims to solve the problems in the prior art by providing a wire cutting method for a large ring forging.
The invention aims at realizing the following technical scheme:
a wire cutting method of a large ring forging sequentially comprises the following steps:
a. manufacturing a scribing template: the method comprises the steps of machining a scribing template with an arc-shaped structure, wherein the radian of the scribing template is the same as that of an annular forging piece, the scribing template is provided with a first positioning surface which can be attached to the upper end surface of the annular forging piece, the inner diameter of the scribing template, the inner diameter of the upper end surface of the annular forging piece or the outer diameter of the scribing template and the outer diameter of the upper end surface of the annular forging piece are the same, two ends of the scribing template are provided with first scribing parts for scribing linear marking lines, the first scribing parts are horizontally arranged, and a first cutting included angle is formed between the first scribing parts and the central line of the end surface of the scribing template;
b. and (3) manufacturing a scribing module: machining a scribing module, wherein the scribing module is provided with a second positioning surface which can be attached to the inner side surface of the ring forging piece, one end of the second positioning surface is provided with a second scribing part used for scribing a curve marking, and a second cutting included angle is formed between the plane where the second scribing part is located and the axis of the ring forging piece;
c. scribing: placing a scribing template on the upper end face of the ring forging, tightly attaching a first positioning face of the scribing template to the upper end face of the ring forging, scribing a linear marking on the upper end face of the ring forging along a first scribing part, placing a scribing module on the inner side of the ring forging, tightly attaching a second positioning face of the scribing module to the inner side face of the ring forging, connecting the upper end of a second scribing part with one end of the inner side of the first scribing part, and scribing a curve marking on the inner side face of the ring forging along a second scribing part;
d. wire cutting: the linear marking line of the upper end surface of the ring forging and the curve marking line of the inner side surface of the ring forging jointly determine a processing plane, and the position of the ring forging is adjusted to enable the processing plane to coincide with a linear cutting wire of a linear cutting machine, so that cutting can be performed.
In the step a, a scribing module is processed by adopting a linear cutting mode.
As a preferable mode of the invention, the scribing module is a steel plate with the thickness of 2 mm.
In the step b, a scribing module is processed by a numerical control milling machine or a processing center.
As a preferred embodiment of the present invention, the wire cutting wire is a molybdenum wire.
Compared with the prior art, the method has the advantages that the corresponding scribing template and scribing module can be manufactured according to the cutting angle, then the scribing template and the scribing module are used for scribing and then wire cutting is carried out, the quality of a wire cutting surface is good, subsequent machining is not needed, compared with separate forging, the method has high production efficiency, the material cost and the die cost are saved, the influence on the physical and chemical properties of products during finish machining and cutting is low, the performance difference of each section caused by separate forging is avoided, in addition, the CNC machining center has limited machining capacity, the large-size ring forging cannot be divided, the ring forging is not used for scribing by an upper machine tool by adopting the method, the requirement on equipment during large-size ring forging segmentation is reduced, and the equipment use cost is greatly reduced.
Drawings
FIG. 1 is a schematic structural view of a ring forging;
FIG. 2 is a front view of an arc segment of the segmented ring forging;
FIG. 3 is a top view of an arc segment after ring segment segmentation;
FIG. 4 is a schematic structural view of a scribing template;
FIG. 5 is a schematic perspective view of a scribing module;
fig. 6 is a schematic structural view of the scribing module.
In the figure:
1. a first positioning surface; 2. a first scribing portion; 3. a second positioning surface; 4. and a second scribing portion.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings. It is to be understood that the embodiments described herein are merely illustrative of the invention and are not limiting thereof.
Referring to fig. 1 to 6, in the present embodiment, a wire cutting method of a large ring forging includes the following steps in order:
a. manufacturing a scribing template: the method comprises the steps that a scribing template with an arc-shaped structure is processed in a linear cutting mode, the radian of the scribing template is the same as that of an annular forging piece, the scribing template is provided with a first positioning surface 1 which can be attached to the upper end face of the annular forging piece, the inner diameter of the scribing template, the inner diameter of the upper end face of the annular forging piece or the outer diameter of the scribing template and the outer diameter of the upper end face of the annular forging piece are the same, two ends of the scribing template are provided with first scribing portions 2 for scribing linear scribing lines, the first scribing portions 2 are horizontally arranged, and a first cutting included angle a is formed between the first scribing portions 2 and the central line of the end face of the scribing template;
b. and (3) manufacturing a scribing module: a scribing module is processed by adopting a processing center, the scribing module is provided with a second positioning surface 3 which can be attached to the inner side surface of the ring forging piece, one end of the second positioning surface 3 is provided with a second scribing part 4 for scribing a curve marking, and a second cutting included angle is formed between the plane of the second scribing part 4 and the axis of the ring forging piece;
c. scribing: placing a scribing template on the upper end face of the ring forging, tightly attaching a first positioning face 1 of the scribing template to the upper end face of the ring forging, scribing a linear marking on the upper end face of the ring forging along a first scribing part 2, placing a scribing module on the inner side of the ring forging, tightly attaching a second positioning face 3 of the scribing module to the inner side face of the ring forging, connecting the upper end of a second scribing part 4 with one end of the inner side of the first scribing part 2, and scribing a curve marking on the inner side face of the ring forging along a second scribing part 4;
d. wire cutting: the linear marking line of the upper end surface of the ring forging and the curve marking line of the inner side surface of the ring forging jointly determine a processing plane, and the position of the ring forging is adjusted to enable the processing plane to coincide with a linear cutting wire of a linear cutting machine, so that cutting can be performed.
Specifically, in this embodiment, the scribing module is a steel plate with a thickness of 2 mm.
Specifically, in this embodiment, the wire cutting filament is a molybdenum filament.
The invention can manufacture the corresponding scribing template and scribing module according to the cutting angle, then uses the scribing template and scribing module to scribe and then performs linear cutting, the quality of the linear cutting surface is good, the subsequent machining is not needed, compared with separate forging, the invention has high production efficiency, saves the material cost and the die cost, has lower influence on the physical and chemical properties of the product during finish machining and cutting, avoids the performance difference of each section caused by separate forging, and can not divide the large-size ring forging due to the limited processing capacity of the CNC machining center.
Compared with the scribing of an upper numerical control machine tool, the scribing template and the scribing module are simple tools, so that the problem of insufficient machining capacity of the machine tool caused by scribing by adopting a large numerical control machine tool is avoided.
The above embodiments merely illustrate the basic principles and features of the present invention, and the present invention is not limited to the above embodiments, but can be variously changed and modified without departing from the spirit and scope of the present invention, which is within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims.
Claims (5)
1. A wire cutting method of a large ring forging is characterized by comprising the following steps of: the method sequentially comprises the following steps of:
a. manufacturing a scribing template: the method comprises the steps of machining a scribing template with an arc-shaped structure, wherein the radian of the scribing template is the same as that of an annular forging piece, the scribing template is provided with a first positioning surface which can be attached to the upper end surface of the annular forging piece, the inner diameter of the scribing template, the inner diameter of the upper end surface of the annular forging piece or the outer diameter of the scribing template and the outer diameter of the upper end surface of the annular forging piece are the same, two ends of the scribing template are provided with first scribing parts for scribing linear marking lines, the first scribing parts are horizontally arranged, and a first cutting included angle is formed between the first scribing parts and the central line of the end surface of the scribing template;
b. and (3) manufacturing a scribing module: machining a scribing module, wherein the scribing module is provided with a second positioning surface which can be attached to the inner side surface of the ring forging piece, one end of the second positioning surface is provided with a second scribing part used for scribing a curve marking, and a second cutting included angle is formed between the plane where the second scribing part is located and the axis of the ring forging piece;
c. scribing: placing a scribing template on the upper end face of the ring forging, tightly attaching a first positioning face of the scribing template to the upper end face of the ring forging, scribing a linear marking on the upper end face of the ring forging along a first scribing part, placing a scribing module on the inner side of the ring forging, tightly attaching a second positioning face of the scribing module to the inner side face of the ring forging, connecting the upper end of a second scribing part with one end of the inner side of the first scribing part, and scribing a curve marking on the inner side face of the ring forging along a second scribing part;
d. wire cutting: the linear marking line of the upper end surface of the ring forging and the curve marking line of the inner side surface of the ring forging jointly determine a processing plane, and the position of the ring forging is adjusted to enable the processing plane to coincide with a linear cutting wire of a linear cutting machine, so that cutting can be performed.
2. The wire cutting method of the large ring forging according to claim 1, wherein the wire cutting method comprises the following steps: in the step a, a scribing template is processed by adopting a linear cutting mode.
3. The wire cutting method of the large ring forging according to claim 2, wherein the wire cutting method comprises the following steps: the scribing template is a steel plate with the thickness of 2 mm.
4. A wire cutting method of a large ring forging according to claim 3, wherein: in the step b, a numerical control milling machine or a machining center is adopted to process the scribing module.
5. A wire cutting method of a large ring forging according to any one of claims 1 to 4, wherein: the wire cutting wire is molybdenum wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110474835.0A CN113210776B (en) | 2021-04-29 | 2021-04-29 | Linear cutting method for large ring forging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110474835.0A CN113210776B (en) | 2021-04-29 | 2021-04-29 | Linear cutting method for large ring forging |
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| CN113210776A CN113210776A (en) | 2021-08-06 |
| CN113210776B true CN113210776B (en) | 2023-08-01 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007276101A (en) * | 2006-03-15 | 2007-10-25 | Sumikin Seiatsuhin Kogyo Kk | Method of manufacturing annular forged part |
| CN102179674B (en) * | 2011-05-17 | 2013-01-09 | 陕西宏远航空锻造有限责任公司 | Sectional wire cutting processing method for ring-shaped workpiece in large thickness and large size |
| CN107414428B (en) * | 2017-08-24 | 2019-05-21 | 中航卓越锻造（无锡）有限公司 | The manufacturing process of ultra-large type fission ring |
| CN207724283U (en) * | 2017-09-27 | 2018-08-14 | 安徽合力股份有限公司合肥铸锻厂 | A kind of heavy castings processing marking-off plate |
| CN109366449A (en) * | 2018-12-04 | 2019-02-22 | 无锡透平叶片有限公司 | A kind of large size arc forging radial center benchmark scribing tooling |
| CN110695623A (en) * | 2019-10-18 | 2020-01-17 | 哈尔滨汽轮机厂有限责任公司 | Process for machining fan-shaped section |
| CN112548979B (en) * | 2020-12-01 | 2022-09-02 | 四川航天长征装备制造有限公司 | Marking method for melon petal chemical milling sample plate |
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