CN101569982A - Manufacturing process for tooth crown of high strength double-geared roller crusher - Google Patents
Manufacturing process for tooth crown of high strength double-geared roller crusher Download PDFInfo
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Abstract
The invention relates to a manufacturing process for a tooth crown of a high strength double-geared roller crusher. The manufacturing process adopts a deformation control process, a control process of the build-up welding time and pre-build-up surface treatment of a hard alloy overlay, a selection process of tooth crown clamping and alignment, a machining process of a draw bar angular hole on the tooth crown, which is used for being connected with a geared ring and a machining process of an inner R arc surface on the tooth crown. The manufacturing process is used for preparing the tooth crown used on the high strength double-geared roller crusher. The tooth crown completely reaches the drawing and assembly requirements concerning the shape and precision, has good use, lays a firm foundation for the design and the manufacture of a larger high strength crusher, extends the market at home and abroad, and has wide application and popularization value.
Description
Technical field:
The present invention relates to the mine machine-building, especially a kind of manufacturing process of tooth crown of high strength double-geared roller crusher.
Prior art
At present, the use occupation rate in each big mine is very big at home at present for large-scale powerful double-geared roller crusher, along with the specification of the continuous development disintegrating machine of China mine industry also is tending towards maximizing, crown is one of main key component in the powerful double-geared roller crusher, in whole shattering process, participate in the work of broken huge ore directly, its physical dimension, process complexity, make, it is also increasing along with the increase of disintegrating machine specification to assemble smart required precision, especially the crown manufacturing of super power crusher, need to solve Deformation control in the manufacturing, the clamping difficulty, measure difficulty, the accuracy of manufacture requires problems such as height, and conventional mechanical manufacturing method can not satisfy the manufacturing needs.
Powerful double-geared roller crusher is participated in the work of broken huge ore directly in whole shattering process with crown, need bear active forces such as the bending force of huge impact power, alternation and friction, and crown structure and manufacturability complexity, clamping, centering difficulty, required precision height in the manufacturing, difficulty of processing is big, and some can not be finished by a clamping to be subjected to locating surface (or arc surface) that structural limitations and its correlated parts ring gear install, can't measure after the manufacturing, and the quality that these faces (or arc surface) are made will directly have influence on assembly quality and serviceability; 1. because its complex structure makes that its rough-cast surplus is quite big, cause the stress deformation that produces in the manufacturing bigger in addition; 2. because crown is participated in fragmentation directly, service life is extremely short in the work, therefore will be at the thick wearing layer of its surface overlaying 10mm, to improve wearability and service life, and also produce bigger distortion and internal stress in the weld deposit process, and mostly the method for eliminating machining stress and the distortion that causes of weldering tension usually is heat treatment, will directly influence the hardness of overlay cladding, and these bring certain degree of difficulty also for the manufacture process of crown.
Summary of the invention:
For solving above-mentioned all difficult problems, the technical program is at the manufacturing of the super power crusher crown of large scale specification, mainly solve the problem of aspects such as Deformation control in making, clamping difficulty, measurement difficulty, the high accuracy of manufacture, adopt the processing process of following crown:
Founding, rule, rough mill, rule, rough mill, heavy boring, heat treatment, shot-peening, built-up welding, line, finish-milling, line, finish-milling and half finish-milling, line, finish-milling, line, right boring, line, slotting machine processing, line, brill, boring processing, pincers worker, check.
Concrete enforcement:
1, founding: adopt die modeling founding crown foundry goods;
2, line: on the crown foundry goods, mark A, B, Q, C, K face;
3, rough mill: adopt milling machine to carry out coarse milling by the A that marks on the crown, B, Q, C, K face and process A, B, Q, C, K face;
4, line: on the crown blank, mark D two sides, R arc surface;
5, rough mill: adopt milling machine to rough mill by the line on the crown blank and process D two sides, R arc surface;
6, heavy boring: adopt boring machine to process line face remaining external surface in addition;
7, heat treatment: because the shape of crown belongs to " saddle-shape ", in the process of casting, the cold and hot contraction of each is inhomogeneous, Volume Changes when the foundry goods inside metallographic changes in addition, the internal stress of blank is very big, in addition because the crown upper face will be participated in broken work, therefore its surface heat also will carry out the thick carbide alloy of built-up welding 10-15mm after handling, in weld deposit process, also can produce bigger distortion, stress is concentrated and crackle, if can not get timely elimination in the mill, to directly influence the accuracy of manufacture, thereby directly influence serviceabilities such as the smoothness of operation of super power crusher and disposal ability, how more effectively to reduce internal stress and the control distortion in making and become the key issue that this crown will solve in the mill; Carry out tempering after heat treatment adopts heating furnace to quench earlier again and eliminate internal stress, hardening heat: 850 ± 10 ℃, firing rate≤80 ℃/h, temperature retention time: 1-2h cools off 20-30min in the oil then; Tempering firing rate≤60 ℃/h, heating-up temperature: 560 ± 10 ℃, temperature retention time: 3-5h, the air cooling of coming out of the stove then;
8, shot-peening: the crown blank after the heat treatment is adopted the bead blank surface;
9, built-up welding: because crown is participated in fragmentation directly, working life is extremely short, so adopt the built-up welding mode to carry out the build-up wear-resistant layer in the crown upper surface, improves wearability and working life, wearing layer thickness: 5-15mm; Overlaying method adopts three kinds of method: I according to purposes: the employing of wear-resisting bed thickness 5-6mm: welding rod need not be dried, alternating current-direct current all can, welding current: 220-280A, hardness detects HRC＞52; II: the employing of wear-resisting bed thickness 8-10mm: in advance welding rod cures 50-60min through 300-350 ℃, adopts dc reverse connection, welding current: 190-230A, and interlayer temperature＜200 ℃, overlay cladding 〉=3 layer, the postwelding air cooling, hardness detects HRC＞52; III: the employing of wear-resisting bed thickness 10-15mm: welding rod cures the 50-60m workpiece through 300-350 ℃ and is preheated to 150 employing dc reverse connections in advance, welding current: 190-230A, welding rod cures 50-60min through 300-350 ℃ in advance, workpiece is preheated to 150 ± 10 ℃, adopt dc reverse connection, welding current: 180-250A, interlayer temperature＜200 ℃, overlay cladding 〉=layer 2-4, hardness detects H RC＞55-60;
10, line: on the crown blank, mark A, Q face;
11, finish-milling: the A, the Q face that adopt milling machine that the crown blank is marked carry out finish-milling;
12, line: on the crown blank, mark C, K, B face and P, D, R+0.23+0.13 face;
13, finish-milling: after adopting milling machine that crown C, K, B face are carried out finish-milling, carry out half finish-milling P, D, R+0.23+0.13 face again;
14, line: on the crown blank, mark size E+0.5+0.3, J 0-0.2 face;
15, finish-milling: adopt milling machine that size E+0.5+0.3, J 0-0.2, the D face that marks on the crown blank carried out finish-milling;
16, line: on the crown blank, mark right boring allowance;
17, right boring: the allowance to heavy boring carries out right boring to finished size;
18, line: on the crown blank, mark the R+0.23+0.13 arc surface;
19, slotting machine processing: adopt slotting machine processing R+0.23+0.13 arc surface;
20, line: adopt and on the crown blank, to mark crown and connect ring gear
70 inclined holes;
21, brill, boring processing: after the slanted angle that adopts special-purpose face mold keyhole start position and employing to form with special-purpose mold control central line and crown blank locating surface was holed and processed, the employing boring machine carried out inclined hole fine finishining;
22, pincers worker: the crown after the machining is carried out pincers worker rest and reorganize;
23, check: on request the crown finished product is tested.
Characteristics of the present invention:
1, because the crown shape is similar to " shape of a saddle ", the structure specific performance makes its processing technology complexity, adopt method thick, that fine finishining separates, when roughing, adopt the mechanical processing technique of efficient cutting such as multiple milling and boring that the most of allowance of crown blank is got rid of before heat treatment, reach basic forming, subsequently the crown blank of roughing is heat-treated, fully eliminate casting stress, improve mechanical performance and reduce the cutting stress that produces in the fine finishining process and the distortion that causes.
2, because the crown shape is similar to " shape of a saddle ", the structure specific performance makes its processing technology complexity, at every turn rough mill, the processing technology of ruling before the heavy boring, finish-milling, half finish-milling, right boring, slotting machine processing;
This programme has rationally increased process area terrace and technological datum face on part, make itself and part processing face form certain plane system (as: former heart O point, A face, Q face, B face, C face, K face, crown are used to be connected the pull bar inclined hole of ring gear and the center intersection point of ring gear locating surface is former heart O point), as clamping benchmark in making; And control the size of this plane system in the mill, make this plane system pass through all the time to scurry and be through in the whole manufacturing process.Can not finish by a clamping for some, require necessary consistent machined surface (as: E+0.5+0.3) and make back relative size, reach the machined surface (as: R+0.23+0.13 arc surface) of installing and after manufacturing, can't measuring with its correlated parts ring gear, reasonably select some technological datum face (as: P in the mill for use, the B face, size H-0.15, G ± 0.075)) as centering in the manufacture process and measuring basis, and guarantee that these datum levels and above-mentioned clamping datum level form certain system relation, equally all the time, pass through to scurry and be through in the whole manufacturing process, thereby solve clamping in the crown manufacture process, the problem of centering difficulty; Process area terrace and technological datum face promptly on the crown blank, have rationally been increased, make itself and part processing face form certain plane system (as: former heart O point, A face, Q face, B face, C face, K face), be used to connect the pull bar inclined hole of ring gear on the crown and the center intersection point of ring gear locating surface is former heart O point, as clamping benchmark in making; And control the size of this plane system in the mill, make this plane system pass through all the time to scurry and be through in the whole manufacturing process.
3, employing fine finishining after heat treatment windrow weldering wearing layer method of advancing, the hard alloy layer hardness of built-up welding is reduced, influence the timely service life of wearability of crown, before built-up welding, also the crown surface to be carried out blasting treatment and necessary polishing, and adopt rational overlaying process to improve the resistance to impact of the wearing layer adhesive force surperficial with it, make the overlay cladding difficult drop-off.Concentrate at the distortion that produces in the weld deposit process, stress in addition and the method for the solution of crackle is to select rational built-up welding time, rational heat treatment method, before promptly adopting built-up welding blank is carried out the laggard windrow weldering of heat treatment earlier according to purposes, improve the mechanical performance and the weldability of material, and the distortion that workpiece caused when solving built-up welding of the surplus mode of utilizing fine finishining to stay.
Beneficial effect
By the crown that above-mentioned large-scale super power crusher crown manufacturing technology is made, owing to taked above quality assurance measure, the accuracy of manufacture reaches drawing and matching requirements fully in manufacture process.Established solid foundation for manufacturing and designing more large-scale super power crusher, opened up the domestic and international market, had and use widely and promotional value.
Description of drawings:
Further specify below in conjunction with description of drawings:
Fig. 1 is the manufacturing process of a kind of powerful double-geared roller crusher with crown
Fig. 2 is crown shape figure.
Embodiment 1:
1, founding: adopt die modeling founding crown foundry goods;
2, line: on the crown foundry goods, mark A, B, Q, C, K face;
3, rough mill: adopt milling machine to carry out coarse milling by the A that marks on the crown, B, Q, C, K face and process A, B, Q, C, K face;
4, line: on the crown blank, mark D two sides, R arc surface;
5, rough mill: adopt milling machine to rough mill by the line on the crown blank and process D two sides, R arc surface;
6, heavy boring: adopt boring machine to process line face remaining external surface in addition;
7, heat treatment: carry out tempering after adopting heating furnace to quench earlier again and eliminate internal stress, hardening heat: 850 ± 10 ℃, firing rate≤80 ℃/h, temperature retention time: 1h cools off 20min in the oil then; Tempering firing rate≤60 ℃/h, heating-up temperature: 560 ± ℃, temperature retention time: 3h, the air cooling of coming out of the stove then;
8, shot-peening: the crown blank after the heat treatment is adopted the bead blank surface;
9, built-up welding: so adopt the built-up welding mode to carry out build-up wear-resistant bed thickness 5-6mm in the crown upper surface, overlaying method adopts according to purposes: welding rod need not be dried, alternating current-direct current all can, welding current: 220-280A, hardness detects HRC＞52;
10, line: on the crown blank, mark A, Q face;
11, finish-milling: the A, the Q face that adopt milling machine that the crown blank is marked carry out finish-milling;
12, line: on the crown blank, mark C, K, B face and P, D, R+0.23+0.13 face;
13, finish-milling: after adopting milling machine that crown C, K, B face are carried out finish-milling, carry out half finish-milling P, D, R+0.23+0.13 face again;
14, line: on the crown blank, mark size E+0.5+0.3, J 0-0.2 face;
15, finish-milling: adopt milling machine that size E+0.5+0.3, J 0-0.2, the D face that marks on the crown blank carried out finish-milling;
16, line: on the crown blank, mark right boring allowance;
17, right boring: the allowance to heavy boring carries out right boring to finished size;
18, line: on the crown blank, mark the R+0.23+0.13 arc surface;
19, slotting machine processing: adopt slotting machine processing R+0.23+0.13 arc surface;
20, line: adopt and on the crown blank, to mark crown and connect ring gear
70 inclined holes;
21, brill, boring processing: after the slanted angle that adopts special-purpose face mold keyhole start position and employing to form with special-purpose mold control central line and crown blank locating surface was holed and processed, the employing boring machine carried out inclined hole fine finishining;
22, pincers worker: the crown after the machining is carried out pincers worker rest and reorganize;
23, check: on request the crown finished product is tested.
Embodiment 2:
1, founding: adopt die modeling founding crown foundry goods;
2, line: on the crown foundry goods, mark A, B, Q, C, K face;
3, rough mill: adopt milling machine to carry out coarse milling by the A that marks on the crown, B, Q, C, K face and process A, B, Q, C, K face;
4, line: on the crown blank, mark D two sides, R arc surface;
5, rough mill: adopt milling machine to rough mill by the line on the crown blank and process D two sides, R arc surface;
6, heavy boring: adopt boring machine to process line face remaining external surface in addition;
7, heat treatment: carry out tempering after adopting heating furnace to quench earlier again and eliminate internal stress, hardening heat: 850 ± 10 ℃, firing rate≤80 ℃/h, temperature retention time: 2h cools off 20min in the oil then; Tempering firing rate≤60 ℃/h, heating-up temperature: 560 ± ℃, temperature retention time: 4h, the air cooling of coming out of the stove then;
8, shot-peening: the crown blank after the heat treatment is adopted the bead blank surface;
9, built-up welding: so adopt the built-up welding mode to carry out the build-up wear-resistant layer in the crown upper surface, improve wearability and working life, wearing layer thickness: 10-15mm adopts: welding rod cures the 50-60m workpiece through 300-350 ℃ and is preheated to 150 ℃ in advance, adopt dc reverse connection, welding current: 190-230A, welding rod cures 50-60min through 300-350 ℃ in advance, workpiece is preheated to 150 ± 10 ℃, adopt dc reverse connection, welding current: 180-250A, interlayer temperature＜200 ℃, overlay cladding 〉=layer 2-4, hardness detects HRC＞55-60;
10, line: on the crown blank, mark A, Q face;
11, finish-milling: the A, the Q face that adopt milling machine that the crown blank is marked carry out finish-milling;
12, line: on the crown blank, mark C, K, B face and P, D, R+0.23+0.13 face;
13, finish-milling: after adopting milling machine that crown C, K, B face are carried out finish-milling, carry out half finish-milling P, D, R+0.23+0.13 face again;
14, line: on the crown blank, mark size E+0.5+0.3, J 0-0.2 face;
15, finish-milling: adopt milling machine that size E+0.5+0.3, J 0-0.2, the D face that marks on the crown blank carried out finish-milling;
16, line: on the crown blank, mark right boring allowance;
17, right boring: the allowance to heavy boring carries out right boring to finished size;
18, line: on the crown blank, mark the R+0.23+0.13 arc surface;
19, slotting machine processing: adopt slotting machine processing R+0.23+0.13 arc surface;
20, line: adopt and on the crown blank, to mark crown and connect ring gear
70 inclined holes;
21, brill, boring processing: after the slanted angle that adopts special-purpose face mold keyhole start position and employing to form with special-purpose mold control central line and crown blank locating surface was holed and processed, the employing boring machine carried out inclined hole fine finishining;
22, pincers worker: the crown after the machining is carried out pincers worker rest and reorganize;
23, check: on request the crown finished product is tested.
Embodiment 3:
1, founding: adopt die modeling founding crown foundry goods;
2, line: on the crown foundry goods, mark A, B, Q, C, K face;
3, rough mill: adopt milling machine to carry out coarse milling by the A that marks on the crown, B, Q, C, K face and process A, B, Q, C, K face;
4, line: on the crown blank, mark D two sides, R arc surface;
5, rough mill: adopt milling machine to rough mill by the line on the crown blank and process D two sides, R arc surface;
6, heavy boring: adopt boring machine to process line face remaining external surface in addition;
7, heat treatment: carry out tempering after adopting heating furnace to quench earlier again and eliminate internal stress, hardening heat: 850 ± 10 ℃, firing rate≤80 ℃/h, temperature retention time: 2h cools off 30min in the oil then; Tempering firing rate≤60 ℃/h, heating-up temperature: 560 ± ℃, temperature retention time: 5h, the air cooling of coming out of the stove then;
8, shot-peening: the crown blank after the heat treatment is adopted the bead blank surface;
9, built-up welding: so adopt the built-up welding mode to carry out the build-up wear-resistant layer in the crown upper surface, improve wearability and working life, wearing layer thickness: 8-10mm, overlaying method adopts according to purposes: welding rod cures 50-60min through 300-350 ℃ in advance, adopt dc reverse connection, welding current: 190-230A, interlayer temperature＜200 ℃, overlay cladding 〉=3 layer, the postwelding air cooling, hardness detects HRC＞52;
10, line: on the crown blank, mark A, Q face;
11, finish-milling: the A, the Q face that adopt milling machine that the crown blank is marked carry out finish-milling;
12, line: on the crown blank, mark C, K, B face and P, D, R+0.23+0.13 face;
13, finish-milling: after adopting milling machine that crown C, K, B face are carried out finish-milling, carry out half finish-milling P, D, R+0.23+0.13 face again;
14, line: on the crown blank, mark size E+0.5+0.3, J 0-0.2 face;
15, finish-milling: adopt milling machine that size E+0.5+0.3, J 0-0.2, the D face that marks on the crown blank carried out finish-milling;
16, line: on the crown blank, mark right boring allowance;
17, right boring: the allowance to heavy boring carries out right boring to finished size;
18, line: on the crown blank, mark the R+0.23+0.13 arc surface;
19, slotting machine processing: adopt slotting machine processing R+0.23+0.13 arc surface;
20, line: adopt and on the crown blank, to mark crown and connect ring gear
70 inclined holes;
21, brill, boring processing: after the slanted angle that adopts special-purpose face mold keyhole start position and employing to form with special-purpose mold control central line and crown blank locating surface was holed and processed, the employing boring machine carried out inclined hole fine finishining;
22, pincers worker: the crown after the machining is carried out pincers worker rest and reorganize;
23, check: on request the crown finished product is tested.
Claims (4)
1, a kind of manufacturing process of tooth crown of high strength double-geared roller crusher is characterized in that: the processing process that adopts following crown: founding, rule, rough mill, rule, rough mill, heavy boring, heat treatment, shot-peening, built-up welding, line, finish-milling, line, finish-milling and half finish-milling, line, finish-milling, line, right boring, line, slotting machine processing, line, brill, boring processing, pincers worker, check.
2, the manufacturing process of a kind of tooth crown of high strength double-geared roller crusher according to claim 1 is characterized in that: the processing process of employing is as follows:
1), founding: adopt die modeling founding crown foundry goods;
2), line: on the crown foundry goods, mark A, B, Q, C, K face;
3), rough mill: adopt milling machine to carry out coarse milling by the A that marks on the crown, B, Q, C, K face and process A, B, Q, C, K face;
4), line: on the crown blank, mark D two sides, R arc surface;
5), rough mill: adopt milling machine to rough mill by the line on the crown blank and process D two sides, R arc surface;
6), heavy boring: adopt boring machine to process line face remaining external surface in addition;
7), heat treatment: carry out tempering after adopting heating furnace to quench earlier again and eliminate internal stress, hardening heat: 850 ± 10 ℃, firing rate≤80 ℃/h, temperature retention time: 1-2h cools off 20-30min in the oil then; Tempering firing rate≤60 ℃/h, heating-up temperature: 560 ± ℃, temperature retention time: 3-5h, the air cooling of coming out of the stove then;
8), shot-peening: the crown blank after the heat treatment is adopted the bead blank surface;
9), built-up welding: adopt the built-up welding mode to carry out the build-up wear-resistant layer in the crown upper surface, wearing layer thickness: 5-15mm; Overlaying method adopts three kinds of method: I according to purposes: the employing of wear-resisting bed thickness 5-6mm: welding rod need not be dried, alternating current-direct current all can, welding current: 220-280A, hardness detects HRC＞52; II: the employing of wear-resisting bed thickness 8-10mm: in advance welding rod cures 50-60min through 300-350 ℃, adopts dc reverse connection, welding current: 190-230A, and interlayer temperature＜200 ℃, overlay cladding 〉=3 layer, the postwelding air cooling, hardness detects HRC＞52; III: the employing of wear-resisting bed thickness 10-15mm: welding rod cures the 50-60m workpiece through 300-350 ℃ and is preheated to 150 employing dc reverse connections in advance, welding current: 190-230A, welding rod cures 50-60min through 300-350 ℃ in advance, workpiece is preheated to 150 ± 10 ℃, adopt dc reverse connection, welding current: 180-250A, interlayer temperature＜200 ℃, overlay cladding 〉=layer 2-4, hardness detects HRC＞55-60;
10), line: on the crown blank, mark A, Q face;
11), finish-milling: the A, the Q face that adopt milling machine that the crown blank is marked carry out finish-milling;
12), line: on the crown blank, mark C, K, B face and P, D, R+0.23+0.13 face;
13), finish-milling: after adopting milling machine that crown C, K, B face are carried out finish-milling, carry out half finish-milling P, D, R+0.23+0.13 face again;
14), line: on the crown blank, mark size E+0.5+0.3, J0-0.2 face;
15), finish-milling: adopt milling machine that size E+0.5+0.3, J0-0.2, the D face that marks on the crown blank carried out finish-milling;
16), line: on the crown blank, mark right boring allowance;
17), right boring: the allowance to heavy boring carries out right boring to finished size;
18), line: on the crown blank, mark the R+0.23+0.13 arc surface;
19), slotting machine processing: adopt slotting machine processing R+0.23+0.13 arc surface;
20), line: adopt and on the crown blank, mark ￠ 70 inclined holes that crown connects ring gear;
21), brill, boring processing: after the slanted angle that adopts special-purpose face mold keyhole start position and employing to form with special-purpose mold control central line and crown blank locating surface was holed and processed, the employing boring machine carried out inclined hole fine finishining;
22), pincers worker: the crown after the machining is carried out pincers worker rest and reorganize;
23), check: on request the crown finished product is tested.
3, the manufacturing process of a kind of tooth crown of high strength double-geared roller crusher according to claim 1, it is characterized in that: adopt method thick, that fine finishining separates, when roughing, adopt the mechanical processing technique of efficient cutting such as multiple milling and boring that the most of allowance of crown blank is got rid of before heat treatment, reach basic forming, subsequently the crown blank of roughing is heat-treated, fully eliminate casting stress, improve mechanical performance and reduce the cutting stress that produces in the fine finishining process and the distortion that causes.
4, the manufacturing process of a kind of tooth crown of high strength double-geared roller crusher according to claim 1 is characterized in that: adopt at every turn rough mill, the processing technology of ruling before the heavy boring, finish-milling, half finish-milling, right boring, slotting machine processing.
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| CNA2008101878361A CN101569982A (en) | 2008-12-24 | 2008-12-24 | Manufacturing process for tooth crown of high strength double-geared roller crusher |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101878361A CN101569982A (en) | 2008-12-24 | 2008-12-24 | Manufacturing process for tooth crown of high strength double-geared roller crusher |
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| CN101569982A true CN101569982A (en) | 2009-11-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102294573A (en) * | 2011-07-27 | 2011-12-28 | 上海第一机床厂有限公司 | Manufacturing method of falcula |
| CN103862236A (en) * | 2014-03-07 | 2014-06-18 | 苏州捷德瑞精密机械有限公司 | Processing method of mechanical parts |
| CN104097033A (en) * | 2014-06-30 | 2014-10-15 | 什邡市明日宇航工业股份有限公司 | Manufacturing process for integral irregular welding box section of advanced training machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102294573A (en) * | 2011-07-27 | 2011-12-28 | 上海第一机床厂有限公司 | Manufacturing method of falcula |
| CN102294573B (en) * | 2011-07-27 | 2013-05-01 | 上海第一机床厂有限公司 | Manufacturing method of falcula |
| CN103862236A (en) * | 2014-03-07 | 2014-06-18 | 苏州捷德瑞精密机械有限公司 | Processing method of mechanical parts |
| CN104097033A (en) * | 2014-06-30 | 2014-10-15 | 什邡市明日宇航工业股份有限公司 | Manufacturing process for integral irregular welding box section of advanced training machine |
| CN114102068A (en) * | 2021-12-17 | 2022-03-01 | 江西洪都航空工业集团有限责任公司 | Method and die for machining support arm part with special-shaped structure |
| CN114102068B (en) * | 2021-12-17 | 2023-10-03 | 江西洪都航空工业集团有限责任公司 | Processing method and die for support arm part with special-shaped structure |
| CN115070346A (en) * | 2022-05-20 | 2022-09-20 | 洛阳中重铸锻有限责任公司 | Manufacturing and correcting method for large four-tooth-roller crushing tooth block |
| CN115070346B (en) * | 2022-05-20 | 2023-08-29 | 洛阳中重铸锻有限责任公司 | Manufacturing and correcting method for large four-tooth roller crushing tooth block |
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