CN111360488A - Processing method of caterpillar track link for caterpillar track - Google Patents
Processing method of caterpillar track link for caterpillar track Download PDFInfo
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- CN111360488A CN111360488A CN202010190239.5A CN202010190239A CN111360488A CN 111360488 A CN111360488 A CN 111360488A CN 202010190239 A CN202010190239 A CN 202010190239A CN 111360488 A CN111360488 A CN 111360488A
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- track link
- caterpillar track
- processing
- quenching
- caterpillar
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
-
- 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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- 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
- C21D9/0087—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for chains, for chain links
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a processing method of a caterpillar track section for a caterpillar track, which comprises the following steps: blanking round steel, heating, fine forging, integral quenching, tempering, processing shaft holes, trepanning and bolt holes, performing magnetic powder inspection and assembling. According to the method for processing the caterpillar track link for the caterpillar track, the traditional 'quenching and tempering and tread induction heat treatment' process is replaced by the full-hardening heat treatment process, and the tread and the nut surface adopt the finish cutting process when the caterpillar track link is forged, so that the process flow is simplified, the investment of processing equipment is reduced, and the production cost is reduced.
Description
Technical Field
The invention relates to a method for processing a caterpillar track section for a caterpillar track, and belongs to the field of engineering machinery caterpillar tracks.
Background
The caterpillar track section is a core part of the crawler-type traveling mechanism, is widely applied to engineering mechanical equipment such as an excavator, a rotary drilling rig, a bulldozer and the like, needs to bear the weight of the excavator, operation load, impact vibration force generated in operation and the like during operation, and has high requirements on overall strength, wear resistance, impact toughness and the like.
The conventional processing method of the caterpillar link comprises the following steps: blanking round steel → heating → forging → residual heat tempering or conventional tempering (matrix hardness 311-375 HB) → tread surface milling processing → tread induction quenching → tempering (surface hardness 48-56 HRC) → processing of shaft holes, trepanning, bolt holes → pulling nut surface → magnetic powder inspection → assembling. The conventional processing method has the problems of complex process, high production cost and the like, and can not meet the requirements of modern industrial production.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for processing a caterpillar track link, which can obtain a caterpillar track link finished product with low cost and high performance.
In order to achieve the purpose, the invention adopts a processing method of a caterpillar track link, which comprises the following steps: blanking round steel, heating, fine forging, integral quenching, tempering, processing shaft holes, trepanning and bolt holes, performing magnetic powder inspection and assembling.
As a further improvement, the processing method of the track link for the crawler comprises the following specific steps:
s1, heating the round steel by a diathermic furnace after blanking;
step S2, flattening, pre-forging, finish forging and finish cutting the heated round steel to perform caterpillar link finish forging;
s3, performing air cooling treatment on the precisely forged track link, and then reheating a track link blank and performing integral quenching and low-temperature tempering;
step S4, processing the shaft hole, the trepanning and the bolt hole;
and step S5, assembling after the magnetic powder inspection is qualified.
As a further improvement, the heating in the step S1 and the finish forging in the step S2 are both at 1120-1180 ℃.
As a further improvement, in the step S2, the finish forging of the track link is performed by finishing the finish forged track link with a composite die and by performing the steps of trimming, tread cutting, nut cutting, punching, and shaping.
In the step S3, the reheating temperature of the track link blank is 850-880 ℃, and the integral quenching is carried out after the heat preservation for 1-1.5 hours.
In a further improvement, in the step S3, the quenching medium is a water-based quenching liquid, the effective concentration of the quenching liquid is 6-10%, and the temperature of the quenching liquid is 20-40 ℃.
In the step S3, after quenching, tempering treatment is carried out at 220-280 ℃, the temperature is kept for 3-4 hours, and the section hardness of the track link is controlled to be 45-50 HRC.
The principle of the invention is as follows: the invention obtains better comprehensive performance by controlling the structure form of the quenched martensite of the workpiece. And integrally quenching at 850-880 ℃ to obtain a quenched martensite structure with the whole section, wherein the grain size is more than 6 grades, and high integral strength and wear resistance are obtained. Tempering at 220-280 ℃ to obtain a martensite structure, controlling the decomposition amount of quenched martensite, improving the impact toughness of the caterpillar link and obtaining better comprehensive performance.
Compared with the prior art, the processing method of the caterpillar track link for the caterpillar track adopts the full-hardening heat treatment process to replace the traditional 'quenching and tempering + tread induction heat treatment' process, and the tread and the nut surface adopt the finish cutting process when the caterpillar track link is forged, so that the process flow is simplified, the investment of processing equipment is reduced, and the production cost is reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.
A processing method of a caterpillar track link for a caterpillar track comprises the following steps: blanking round steel, heating, fine forging, integral quenching, tempering, processing shaft holes, trepanning and bolt holes, performing magnetic powder inspection and assembling.
As a further improvement, the processing method of the track link for the crawler comprises the following specific steps:
s1, heating the round steel by a diathermic furnace after blanking;
step S2, flattening, pre-forging, finish forging and finish cutting the heated round steel to perform caterpillar link finish forging;
s3, performing air cooling treatment on the precisely forged track link, and then reheating a track link blank and performing integral quenching and low-temperature tempering;
step S4, processing the shaft hole, the trepanning and the bolt hole;
and step S5, assembling after the magnetic powder inspection is qualified.
As a further improvement, the heating in the step S1 and the finish forging in the step S2 are both at 1120-1180 ℃.
As a further improvement, in the step S2, the finish forging of the track link is performed by finishing the finish forged track link with a composite die and by performing the steps of trimming, tread cutting, nut cutting, punching, shaping, and the like. The caterpillar track section forging adopts a precision forging process, the tread and the nut surface are precisely cut to the size of a finished product, and subsequent processing is not required
In a further improvement, in the step S3, the reheating temperature of the track link blank is 850-880 ℃, the overall quenching is performed after the heat preservation is performed for 1-1.5 hours, the effective concentration of the quenching liquid is 6-10%, the quenching liquid can be, for example, AQ251 aqueous solution, the temperature of the quenching liquid is 20-40 ℃, the tempering treatment is performed at 220-280 ℃ after the quenching, the heat preservation is performed for 3-4 hours, and the section hardness of the track link is controlled to be 45-50 HRC. After forging, the caterpillar track section is subjected to integral heat treatment once, integral quenching is carried out at 850-880 ℃, low-temperature tempering is carried out at 220-280 ℃, the integral hardness is controlled at 45-50 HRC, and the caterpillar track section subjected to integral hardening treatment is obtained.
Example 1
A processing method of a caterpillar track link for a caterpillar track specifically comprises the following steps:
s1, heating round steel to 1120-1130 ℃ by a diathermic furnace after blanking;
step S2, flattening, pre-forging, finish forging, fine cutting and other processes are carried out on the heated round steel at 1120-1130 ℃, and simultaneously, the processes of trimming, cutting a tread, cutting a nut face, punching, shaping and the like are completed;
s3, carrying out air cooling treatment on the precisely forged track link, then reheating to 850-860 ℃, carrying out overall quenching after heat preservation for 1 hour, wherein a quenching medium is a water-based quenching liquid, the effective concentration of the quenching liquid is 6%, the temperature of the quenching liquid is 20 ℃, carrying out tempering treatment at 220-230 ℃ after quenching, carrying out heat preservation for 3 hours, and controlling the section hardness of the track link to be 45-50 HRC;
step S4, processing the shaft hole, the trepanning and the bolt hole;
and step S5, assembling after the magnetic powder inspection is qualified.
Example 2
A processing method of a caterpillar track link for a caterpillar track specifically comprises the following steps:
s1, heating round steel to 1140-1150 ℃ by a diathermic furnace after blanking;
step S2, flattening, pre-forging, finish forging, fine cutting and other processes are carried out on the heated round steel at 1140-1150 ℃, and simultaneously the processes of trimming, cutting a tread, cutting a nut face, punching, shaping and the like are completed;
step S3, carrying out air cooling treatment on the precisely forged track link, then reheating to 865-870 ℃, carrying out integral quenching after heat preservation for 1.5 hours, wherein a quenching medium is a water-based quenching liquid, the effective concentration of the quenching liquid is 8%, the temperature of the quenching liquid is 30 ℃, carrying out tempering treatment at 270-280 ℃ after quenching, carrying out heat preservation for 3.5 hours, and controlling the section hardness of the track link to be 45-50 HRC;
step S4, processing the shaft hole, the trepanning and the bolt hole;
and step S5, assembling after the magnetic powder inspection is qualified.
The caterpillar track section processed by the method has the tensile strength of more than or equal to 1600MPa, the elongation of more than or equal to 11 percent and the impact toughness of more than or equal to 40J/cm2。
According to the method for processing the caterpillar track link for the caterpillar track, the traditional 'quenching and tempering plus tread induction heat treatment' process is replaced by the full-hardening heat treatment process, and the tread and the nut surface adopt the finish cutting process when the caterpillar track link is forged, so that the process flow is simplified, the investment of processing equipment is reduced, and the production cost is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A processing method of a caterpillar track link for a caterpillar track is characterized by comprising the following steps: blanking round steel, heating, fine forging, integral quenching, tempering, processing shaft holes, trepanning and bolt holes, performing magnetic powder inspection and assembling.
2. The method for processing the caterpillar track link according to claim 1, wherein the method comprises the following steps:
s1, heating the round steel by a diathermic furnace after blanking;
step S2, flattening, pre-forging, finish forging and finish cutting the heated round steel to perform caterpillar link finish forging;
s3, performing air cooling treatment on the precisely forged track link, and then reheating a track link blank and performing integral quenching and low-temperature tempering;
step S4, processing the shaft hole, the trepanning and the bolt hole;
and step S5, assembling after the magnetic powder inspection is qualified.
3. The method for processing the track link for the crawler according to claim 2, wherein the heating in the step S1 and the finish forging in the step S2 are both at a temperature of 1120-1180 ℃.
4. The method of claim 2 or 3, wherein the step of finish forging the track link in step S2 includes the steps of trimming, cutting the tread, cutting the nut face, punching, and shaping while finish-cutting the finish-forged track link with a composite die.
5. The method for processing the caterpillar track link as claimed in claim 2, wherein in step S3, the caterpillar track link blank is reheated to 850-880 ℃, and is subjected to integral quenching after being kept warm for 1-1.5 hours.
6. The method for processing the caterpillar track link according to claim 5, wherein in the step S3, the quenching medium is a water-based quenching liquid, the effective concentration of the quenching liquid is 6-10%, and the temperature of the quenching liquid is 20-40 ℃.
7. The method for processing the caterpillar track link according to claim 6, wherein in step S3, the tempering treatment is performed at 220-280 ℃ after quenching, the temperature is maintained for 3-4 hours, and the section hardness of the caterpillar track link is controlled to be 45-50 HRC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010190239.5A CN111360488A (en) | 2020-03-18 | 2020-03-18 | Processing method of caterpillar track link for caterpillar track |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010190239.5A CN111360488A (en) | 2020-03-18 | 2020-03-18 | Processing method of caterpillar track link for caterpillar track |
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| CN111360488A true CN111360488A (en) | 2020-07-03 |
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Cited By (7)
| 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 |
| 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 |
| CN113122692A (en) * | 2021-04-01 | 2021-07-16 | 苏州九源机械有限公司 | Heat treatment process for production of excavator caterpillar link |
| EP4163410A1 (en) * | 2021-10-07 | 2023-04-12 | Berco S.p.A. | Track link production method |
| CN117401402A (en) * | 2023-12-14 | 2024-01-16 | 莱州市莱索制品有限公司 | Conveying device for caterpillar links |
| CN117778878A (en) * | 2023-12-19 | 2024-03-29 | 索特传动设备有限公司 | Wear-resistant manganese boron steel, caterpillar track section, preparation method and application thereof |
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| US7040080B2 (en) * | 2002-06-14 | 2006-05-09 | Komatsu Ltd. | Track link production method and track link produced by the same |
| CN101314812A (en) * | 2008-06-05 | 2008-12-03 | 南京汽车锻造有限公司 | Smithing exhaust heat quenching process for caterpillar track node with node pitch more than 200mm |
| CN103540716A (en) * | 2013-09-22 | 2014-01-29 | 徐州徐工铁路装备有限公司 | Processing method of tread thermal treatment for caterpillar link |
| CN107282839A (en) * | 2017-08-01 | 2017-10-24 | 台州市宇鹏机械锻造有限公司 | A kind of forging technology of forging |
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Patent Citations (5)
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| CN1126679A (en) * | 1994-08-16 | 1996-07-17 | 托比工业株式会社 | Method for producing a vehicular endless track link |
| US7040080B2 (en) * | 2002-06-14 | 2006-05-09 | Komatsu Ltd. | Track link production method and track link produced by the same |
| CN101314812A (en) * | 2008-06-05 | 2008-12-03 | 南京汽车锻造有限公司 | Smithing exhaust heat quenching process for caterpillar track node with node pitch more than 200mm |
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Cited By (10)
| 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 |
| 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 |
| CN113122692A (en) * | 2021-04-01 | 2021-07-16 | 苏州九源机械有限公司 | Heat treatment process for production of excavator caterpillar link |
| CN113000777A (en) * | 2021-04-06 | 2021-06-22 | 苏州九源机械有限公司 | Forging process of excavator caterpillar link |
| 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 |
| EP4163410A1 (en) * | 2021-10-07 | 2023-04-12 | Berco S.p.A. | Track link production method |
| WO2023057430A1 (en) * | 2021-10-07 | 2023-04-13 | Berco S.P.A. | Track link production method |
| CN117401402A (en) * | 2023-12-14 | 2024-01-16 | 莱州市莱索制品有限公司 | Conveying device for caterpillar links |
| CN117401402B (en) * | 2023-12-14 | 2024-02-13 | 莱州市莱索制品有限公司 | Conveying device for caterpillar links |
| CN117778878A (en) * | 2023-12-19 | 2024-03-29 | 索特传动设备有限公司 | Wear-resistant manganese boron steel, caterpillar track section, preparation method and application thereof |
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Application publication date: 20200703 |