CN111195696A - Processing technology for large-size forged caterpillar link and caterpillar link - Google Patents
Processing technology for large-size forged caterpillar link and caterpillar link Download PDFInfo
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- CN111195696A CN111195696A CN202010008887.4A CN202010008887A CN111195696A CN 111195696 A CN111195696 A CN 111195696A CN 202010008887 A CN202010008887 A CN 202010008887A CN 111195696 A CN111195696 A CN 111195696A
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- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- 238000000137 annealing Methods 0.000 claims abstract description 45
- 238000005242 forging Methods 0.000 claims abstract description 33
- 238000010791 quenching Methods 0.000 claims abstract description 25
- 230000000171 quenching effect Effects 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 230000006698 induction Effects 0.000 claims abstract description 8
- 238000004080 punching Methods 0.000 claims abstract description 7
- 238000009966 trimming Methods 0.000 claims abstract description 7
- 238000005496 tempering Methods 0.000 claims abstract description 6
- 238000007127 saponification reaction Methods 0.000 claims abstract description 4
- 238000011084 recovery Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000005485 electric heating Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 239000008399 tap water Substances 0.000 claims description 4
- 235000020679 tap water Nutrition 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 239000000344 soap Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/18—Tracks
- B62D55/20—Tracks of articulated type, e.g. chains
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Forging (AREA)
Abstract
The invention belongs to the technical field of caterpillar link processing, and particularly relates to a processing technology for large-size forged caterpillar links and caterpillar links, which comprise the following processing steps: s1: annealing treatment, namely preparing annealing equipment; s2: blanking; s3: phosphorization and saponification treatment; s4: forging and forging the blank, namely placing the blank on a caterpillar track section die, fixing the die on large forging equipment, wherein the forging pressure of the forging equipment is more than 10000 tons, heating the blank to the range of 1200 +/-25 ℃ during forging, and the temperature difference between the core surface and the surface is less than or equal to 50 ℃; s5: punching and trimming; s6: quenching, namely quenching the large-size forged caterpillar track section, carrying out continuous induction quenching, continuously scanning the heating speed of 350-: tempering; the large-size forged caterpillar track section has the advantages of good surface quality, good mechanical property and difficulty in brittle fracture.
Description
Technical Field
The invention relates to the technical field of caterpillar link processing, in particular to a processing technology for large-size forged caterpillar links and caterpillar links.
Background
Forging is a forging processing method which enables a blank or an ingot to generate plastic deformation under the action of forging equipment and a die so as to obtain a certain geometric shape and quality.
The casting is a processing method which comprises the steps of smelting metal into liquid meeting certain requirements, pouring the liquid into a casting mold, cooling, solidifying and cleaning to obtain a casting with a preset shape, size and performance.
The caterpillar track section with the maximum distance of 350mm in the world is one of large engineering machinery chassis parts and is commonly used on electric shovels and excavators with the distance of more than 250T. The track shoe produced by adopting the casting process has the defects of easy formation of air holes and shrinkage cavities, poor surface quality, poor mechanical property, easy brittle failure and the like, and cannot meet the use requirement. The mechanical property of a forged piece product produced by the existing forging process is much superior to that of a product produced by a casting process, and a special ultra-large forging device and a special ultra-large forging die for forging the caterpillar track link are required to be provided for applying the forging process to the production process of the caterpillar track link.
In order to solve the problems, the application provides a processing technology for forging the caterpillar track section in a large size and the caterpillar track section.
Disclosure of Invention
Objects of the invention
In order to solve the technical problems in the background art, the invention provides a processing technology of a large-size forged caterpillar track section and the caterpillar track section, and the processing technology has the characteristic of replacing the traditional casting production mode.
(II) technical scheme
In order to solve the problems, the invention provides a processing technology of a large-size forged caterpillar track section, which comprises the following processing steps:
s1: annealing treatment, namely preparing annealing equipment, and putting the blank into the annealing equipment, wherein the annealing equipment comprises an annealing furnace and a heat recovery box, a first temperature sensor is arranged on the annealing furnace, the detection end of the first temperature sensor extends into the annealing furnace, an S-shaped heat exchange tube is arranged in the heat recovery box, two ends of the S-shaped heat exchange tube are communicated with the inside of the annealing furnace, a water inlet tube and a water outlet tube are arranged on one side of the heat recovery box, a second temperature sensor is also arranged on the heat recovery box, and the detection end of the second temperature sensor extends into the heat recovery box;
s2: blanking, namely processing by adopting a centerless lathe, peeling the whole round steel, and then blanking by using a sawing machine;
s3: phosphating and saponifying, namely removing oxide skin on the surface of the blank by hydrochloric acid; after acid washing, a layer of phosphate film is generated on the surface of the blank through phosphating treatment, and the phosphated blank is put into a saponification cylinder to absorb soap liquid;
s4: forging and forging the blank, namely placing the blank on a caterpillar track section die, fixing the die on large forging equipment, wherein the forging pressure of the forging equipment is more than 10000 tons, heating the blank to the range of 1200 +/-25 ℃ during forging, and the temperature difference between the core surface and the surface is less than or equal to 50 ℃;
s5: punching and trimming, namely placing the formed workpiece in a high-speed machining center for machining, and punching and trimming the workpiece to obtain a formed large-size forged caterpillar link;
s6: quenching, namely quenching the large-size forged caterpillar track section, carrying out continuous induction quenching, continuously scanning the heating speed of 350-;
s7: and (4) tempering, namely heating the quenched large-size forged track section at the temperature of 230 ℃ and 250 ℃, and preserving the heat for 1-4 hours to obtain the finished large-size forged track section.
Preferably, the interior bottom of annealing stove is provided with first electric heating wire, the interior upper portion of annealing stove is provided with second electric heating wire, and the annealing stove inside that is located first electric heating wire top is fixed with the supporting network, the top of supporting network is fixed with the support frame, the top of support frame is provided with the tray, be provided with the stock in the tray.
Preferably, all the cooperation is installed the valve on inlet tube and the outlet pipe, the upper end of S-shaped heat exchange tube is connected with first connecting pipe, the upper portion at the annealing stove is connected to the other end of first connecting pipe, the lower extreme of S-shaped heat exchange tube is connected with the second connecting pipe, and the second connecting pipe is connected with turbofan 'S air inlet end, turbofan' S air-out end is connected with the third connecting pipe, the other end of third connecting pipe and the sub-unit connection of annealing stove.
Preferably, the first connecting pipe is provided with an electromagnetic valve.
Preferably, in S6, quenching the large-size forged track link, performing continuous induction quenching, continuously scanning and heating at 365mm/min, wherein the quenching medium is tap water and the water temperature is 30 ℃.
Preferably, in the step S7, tempering, heating the quenched large-size forged track link at 240 ℃, and preserving heat for 2.5 hours to obtain a finished large-size forged track link.
A large-size forged caterpillar track section is formed by processing a large-size forged caterpillar track section through a processing technology.
Preferably, the large size forged track section has a pitch of 350 mm.
The technical scheme of the invention has the following beneficial technical effects:
1. the large-size forged caterpillar track section obtained by the processing technology of the large-size forged caterpillar track section has good surface quality and mechanical property and is not easy to brittle fracture;
2. when annealing the stock, unnecessary heat according to the processing condition, can be appropriate discharge the heat to the heat recovery case, and the aquatic in heat transfer to the heat recovery case, water absorbs the heat, and hot water can supply people to use.
Drawings
FIG. 1 is a flow chart of the process of the present invention;
FIG. 2 is a schematic view of the structure of an annealing apparatus according to the present invention;
FIG. 3 is a schematic view of a large-sized forged track link according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example 1
As shown in fig. 1-3, the processing technology of the large-size forged track link provided by the invention comprises the following processing steps:
s1: annealing treatment, preparing annealing equipment, and putting the blank into the annealing equipment, wherein the annealing equipment comprises an annealing furnace 2 and a heat recovery box 3, a first temperature sensor 5 is arranged on the annealing furnace 2, the detection end of the first temperature sensor 5 extends into the annealing furnace 2, an S-shaped heat exchange tube 12 is arranged in the heat recovery box 3, two ends of the S-shaped heat exchange tube 12 are communicated with the inside of the annealing furnace 2, a water inlet tube 14 and a water outlet tube 15 are arranged on one side of the heat recovery box 3, a second temperature sensor 17 is also arranged on the heat recovery box 3, and the detection end of the second temperature sensor 17 extends into the heat recovery box 3;
s2: blanking, namely processing by adopting a centerless lathe, peeling the whole round steel, and then blanking by using a sawing machine;
s3: phosphating and saponifying, namely removing oxide skin on the surface of the blank by hydrochloric acid; after acid washing, a layer of phosphate film is generated on the surface of the blank through phosphating treatment, and the phosphated blank is put into a saponification cylinder to absorb soap liquid;
s4: forging and forging the blank, namely placing the blank on a caterpillar track section die, fixing the die on large forging equipment, wherein the forging pressure of the forging equipment is more than 10000 tons, heating the blank to the range of 1200 +/-25 ℃ during forging, and the temperature difference between the core surface and the surface is less than or equal to 50 ℃;
it is worth to be noted that when the die is produced and processed, a cavity of the die needs to be processed by a high-speed processing center so as to ensure the precision of the die, a blank of the die needs to be heated to be within the range of 1200 +/-25 ℃, and the temperature difference between the core surface and the surface is less than or equal to 50 ℃;
s5: punching and trimming, namely placing the formed workpiece in a high-speed machining center for machining, and punching and trimming the workpiece to obtain a formed large-size forged caterpillar link;
s6: quenching, namely quenching the large-size forged caterpillar track section, carrying out continuous induction quenching, continuously scanning the heating speed of 350-;
s7: and (4) tempering, namely heating the quenched large-size forged track section at the temperature of 230 ℃ and 250 ℃, and preserving the heat for 1-4 hours to obtain the finished large-size forged track section.
In this embodiment, it should be noted that the first electric heating wire 18 is disposed at the inner bottom of the annealing furnace 2, the second electric heating wire 4 is disposed at the inner upper portion of the annealing furnace 2, the supporting net 8 is fixed inside the annealing furnace 2 above the first electric heating wire 18, the supporting frame 6 is fixed at the top of the supporting net 8, the tray 7 is disposed at the top of the supporting frame 6, and the blank is disposed in the tray 7.
In this embodiment, it should be noted that valves 16 are respectively installed on the water inlet pipe 14 and the water outlet pipe 15 in a matching manner, the upper end of the S-shaped heat exchange pipe 12 is connected with a first connection pipe 11, the other end of the first connection pipe 11 is connected to the upper portion of the annealing furnace 2, the lower end of the S-shaped heat exchange pipe 12 is connected with a second connection pipe, the second connection pipe is connected with the air inlet end of the turbo fan 9, the air outlet end of the turbo fan 9 is connected with a third connection pipe 10, and the other end of the third connection pipe 10 is connected with the lower.
In this embodiment, it should be noted that the solenoid valve 13 is mounted on the first connecting pipe 11.
In this embodiment, in S6, quenching is performed, in which a large-sized forged track link is quenched, continuous induction quenching is performed, the heating speed is 365mm/min by continuous scanning, the quenching medium is tap water, and the water temperature is 30 ℃.
In this embodiment, it should be noted that in S7, the large-size forged track link after quenching is tempered, heated to 240 ℃, and then heat preserved for 2.5 hours, so as to obtain a finished large-size forged track link.
In the scheme of the invention, a first temperature sensor 5 is arranged on an annealing furnace 2, a detection end of the first temperature sensor 5 extends to the inside of the annealing furnace 2, an S-shaped heat exchange tube 12 is arranged in a heat recovery box 3, two ends of the S-shaped heat exchange tube 12 are communicated with the inside of the annealing furnace 2, a water inlet tube 14 and a water outlet tube 15 are arranged on one side of the heat recovery box 3, a second temperature sensor 17 is also arranged on the heat recovery box 3, a detection end of the second temperature sensor 17 extends to the inside of the heat recovery box 3, when blank materials are annealed, redundant heat can be properly discharged into the heat recovery box 3 according to the processing condition, the heat is transferred into water in the heat recovery box 3, the water absorbs the heat, and the hot water can be used by people;
example 2
As shown in fig. 3, a large-size forged track link 1 is formed by a machining process of the large-size forged track link.
In this embodiment, it should be noted that the pitch of the large-sized forged track link is 350 mm.
According to the invention, the large-size forged caterpillar track section is quenched, continuous induction quenching is carried out, the heating speed is continuously scanned at 365mm/min, the quenching medium is tap water, the water temperature is 30 ℃, the workpiece is integrally heated by controlling the heating speed and the heat preservation time of the workpiece, the full tempering of the caterpillar track section is ensured, the organization is better stabilized, the residual internal stress is reduced, the product quality is improved, and the large-size forged caterpillar track section has good surface quality, good mechanical property and is not easy to brittle fracture.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A processing technology for large-size forged caterpillar track sections is characterized by comprising the following processing steps:
s1: annealing, preparing annealing equipment, and putting the blank into the annealing equipment, wherein the annealing equipment comprises an annealing furnace (2) and a heat recovery box (3), a first temperature sensor (5) is arranged on the annealing furnace (2), the detection end of the first temperature sensor (5) extends into the annealing furnace (2), an S-shaped heat exchange tube (12) is arranged in the heat recovery box (3), two ends of the S-shaped heat exchange tube (12) are communicated with the inside of the annealing furnace (2), a water inlet tube (14) and a water outlet tube (15) are arranged on one side of the heat recovery box (3), a second temperature sensor (17) is further arranged on the heat recovery box (3), and the detection end of the second temperature sensor (17) extends into the heat recovery box (3);
s2: blanking, namely processing by adopting a centerless lathe, peeling the whole round steel, and then blanking by using a sawing machine;
s3: phosphating and saponifying, namely removing oxide skin on the surface of the blank by hydrochloric acid; after acid washing, a layer of phosphate film is generated on the surface of the blank through phosphating treatment, and the phosphated blank is put into a saponification cylinder to absorb soap liquid;
s4: forging and forging the blank, namely placing the blank on a caterpillar track section die, fixing the die on large forging equipment, wherein the forging pressure of the forging equipment is more than 10000 tons, heating the blank to the range of 1200 +/-25 ℃ during forging, and the temperature difference between the core surface and the surface is less than or equal to 50 ℃;
s5: punching and trimming, namely placing the formed workpiece in a high-speed machining center for machining, and punching and trimming the workpiece to obtain a formed large-size forged caterpillar link;
s6: quenching, namely quenching the large-size forged caterpillar track section, carrying out continuous induction quenching, continuously scanning the heating speed of 350-;
s7: and (4) tempering, namely heating the quenched large-size forged track section at the temperature of 230 ℃ and 250 ℃, and preserving the heat for 1-4 hours to obtain the finished large-size forged track section.
2. The processing technology of the large-size forged caterpillar track section according to claim 1, wherein a first electric heating wire (18) is arranged at the inner bottom of the annealing furnace (2), a second electric heating wire (4) is arranged at the inner upper portion of the annealing furnace (2), a supporting net (8) is fixed inside the annealing furnace (2) above the first electric heating wire (18), a supporting frame (6) is fixed at the top of the supporting net (8), a tray (7) is arranged at the top of the supporting frame (6), and a blank is arranged in the tray (7).
3. The machining process of the large-size forged caterpillar track section according to claim 2, wherein valves (16) are installed on the water inlet pipe (14) and the water outlet pipe (15) in a matched mode, a first connecting pipe (11) is connected to the upper end of the S-shaped heat exchange pipe (12), the other end of the first connecting pipe (11) is connected to the upper portion of the annealing furnace (2), a second connecting pipe is connected to the lower end of the S-shaped heat exchange pipe (12), the second connecting pipe is connected with the air inlet end of the turbofan (9), the air outlet end of the turbofan (9) is connected with a third connecting pipe (10), and the other end of the third connecting pipe (10) is connected with the lower portion of the annealing furnace (2).
4. A process for machining a large-size forged track link as claimed in claim 3, wherein said first connecting pipe (11) is provided with a solenoid valve (13).
5. The processing technology of the large-size forged track link as claimed in claim 1, wherein in step S6, quenching is performed, the large-size forged track link is quenched and is subjected to continuous induction quenching, the heating speed is continuously scanned at 365mm/min, the quenching medium is tap water, and the water temperature is 30 ℃.
6. The processing technology of the large-size forged track link as claimed in claim 1, wherein in the step S7, the large-size forged track link after quenching is tempered, heated to 240 ℃ and kept warm for 2.5 hours to obtain the finished large-size forged track link.
7. A large size forged track link, characterized in that said large size forged track link (1) is formed by a process of any one of claims 1 to 6.
8. The oversized forged track section as claimed in claim 7, wherein the oversized forged track section has a pitch of 350 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010008887.4A CN111195696A (en) | 2020-01-06 | 2020-01-06 | Processing technology for large-size forged caterpillar link and caterpillar link |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010008887.4A CN111195696A (en) | 2020-01-06 | 2020-01-06 | Processing technology for large-size forged caterpillar link and caterpillar link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112475163A (en) * | 2020-12-08 | 2021-03-12 | 徐州徐工履带底盘有限公司 | Full-automatic caterpillar track section forging process adopting multi-station die |
| CN112496675A (en) * | 2020-11-06 | 2021-03-16 | 青岛征和工业股份有限公司 | Machining process for low-speed high-power marine engine transmission chain plate |
| CN113000778A (en) * | 2021-04-08 | 2021-06-22 | 苏州九源机械有限公司 | Caterpillar track link processing technology based on trimming die |
| CN113000777A (en) * | 2021-04-06 | 2021-06-22 | 苏州九源机械有限公司 | Forging process of excavator caterpillar link |
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| CN107828953A (en) * | 2017-08-22 | 2018-03-23 | 徐州徐工履带底盘有限公司 | A kind of Chain Link quenching unit and processing technology |
| CN107805694A (en) * | 2017-11-18 | 2018-03-16 | 双威大昌锻造(安徽)有限公司 | The quenching unit and its operating method of a kind of Chain Link |
| CN207435503U (en) * | 2017-11-18 | 2018-06-01 | 双威大昌锻造(安徽)有限公司 | It is a kind of to be used for Chain Link axis, the heating unit of axle sleeve |
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| CN112475163A (en) * | 2020-12-08 | 2021-03-12 | 徐州徐工履带底盘有限公司 | Full-automatic caterpillar track section forging process adopting multi-station die |
| CN112475163B (en) * | 2020-12-08 | 2022-05-10 | 徐州徐工履带底盘有限公司 | Full-automatic caterpillar track section forging process adopting multi-station die |
| CN113000777A (en) * | 2021-04-06 | 2021-06-22 | 苏州九源机械有限公司 | Forging process of excavator caterpillar link |
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