CN111097873A - Processing technology of trailer connecting frame - Google Patents
Processing technology of trailer connecting frame Download PDFInfo
- Publication number
- CN111097873A CN111097873A CN201911359373.7A CN201911359373A CN111097873A CN 111097873 A CN111097873 A CN 111097873A CN 201911359373 A CN201911359373 A CN 201911359373A CN 111097873 A CN111097873 A CN 111097873A
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- China
- Prior art keywords
- forging
- connecting frame
- piece
- forge piece
- hours
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K7/00—Making railway appurtenances; Making vehicle parts
- B21K7/12—Making railway appurtenances; Making vehicle parts parts for locomotives or vehicles, e.g. frames, underframes
-
- 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
- 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
Abstract
The invention relates to the technical field of trailer connecting frame processing, and discloses a trailer connecting frame processing technology, which comprises the following steps: the method comprises the following steps: preparing materials: preparing a plurality of forgings and a plurality of high-strength steel bars, pre-cutting the forgings by using a numerical control machine, and cutting the steel bars by using a cutting machine to obtain a plurality of steel plates and a plurality of steel bars for later use; step two: forging and preheating: preheating the forging by using a heating furnace, heating the forging to 350-380 ℃, setting the time for heating the forging to be 1-2 hours, and keeping the forging in a heat preservation state for 2-2.5 hours after the forging is heated; step three: forging the forged piece roughly: and after the forging is heated and kept for 2-2.5 hours in the second step, forging and forming the forging. According to the trailer connecting frame machining process, the strength of the connecting frame is improved by carrying out temperature machining on the forge piece and forging for multiple times.
Description
Technical Field
The invention relates to the technical field of trailer connecting frame processing, in particular to a trailer connecting frame processing technology.
Background
A trailer refers to a vehicle that is towed by a car without power drive per se. A combination of a car (truck or tractor, forklift) and one or more trailers. The truck and the tractor are driving sections of the automobile train and are called as main trains. The slave node towed by the master is called a trailer. The method is an important vehicle type for road transportation, and the transportation by adopting the automobile train is the most effective and simple important means for improving the economic benefit. The method has the advantages of rapidness, mobility, flexibility, safety and the like; the zone transportation can be conveniently realized. The trailer can only be combined with a tractor or other vehicle to form a complete vehicle. The total weight of the trailer is borne by itself and is called a full trailer, also referred to as a trailer for short. The trailer is characterized in that the trailer is unpowered and independently loaded, and the vehicle trailer which runs by being pulled by other vehicles needs to be pulled by an automobile according to the design and technical characteristics to be normally used for carrying personnel or goods. A trailer with the full trailer pulled by a tractor and the full mass borne by itself; a trailer that is towed by a tractor and whose part of the mass is taken up by the tractor.
The trailer connecting frame is a vital part on a trailer, the steps of the traditional trailer connecting frame machining process comprise forging selection, forging and machining into a finished product, so that the forging is low in strength, potential safety hazards exist in the use process of the forging, the use of the trailer is further influenced, and the trailer connecting frame machining process is provided for solving the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a trailer connecting frame processing technology which has the advantages of small friction coefficient and small damage to a ground piece, and solves the problems that the friction coefficient is large, the ground piece is greatly damaged, the mechanical strength of a product is not high enough and some special requirements cannot be met at present.
(II) technical scheme
In order to achieve the purpose of accurately obtaining effective assessment about the financial capacity of an enterprise, the invention provides the following technical scheme: a trailer connecting frame machining process comprises the following steps:
the method comprises the following steps: preparing materials: preparing a plurality of forgings and a plurality of high-strength steel bars, pre-cutting the forgings by using a numerical control machine, and cutting the steel bars by using a cutting machine to obtain a plurality of steel plates and a plurality of steel bars for later use;
step two: forging and preheating: preheating the forging by using a heating furnace, heating the forging to 350-380 ℃, setting the time for heating the forging to be 1-2 hours, and keeping the forging in a heat preservation state for 2-2.5 hours after the forging is heated;
step three: forging the forged piece roughly: after the forge piece in the second step is heated and kept for 2-2.5 hours, forging and forming the forge piece according to the specified requirements, after forging is carried out until the forge piece is preliminarily formed, rapidly cooling the forge piece in a water cooling mode, keeping the cooled forge piece at the normal temperature, standing for 1-1.5 hours, and entering a fourth step;
step four: fine forging of the forged piece: heating the forge piece cooled for 1-1.5 hours to 800-1000 ℃ by using the heating furnace, setting the heating time of the forge piece to be 20-40 minutes, preserving the heat of the forge piece for 40-60 minutes after the forge piece is heated, then placing the forge piece into a water tank, cooling the forge piece to 20-30 ℃ by using the water tank, then precisely forging the forge piece subjected to heating processing by using a numerical control machine, forging the forge piece to be completely molded, and entering the fifth step;
step five: preheating the forging again: heating the forged piece obtained in the fourth step to 560-580 ℃ by using a heating furnace, then preserving heat of the forged piece in the heating furnace for 3-4 hours, then cooling the forged piece in a natural cooling mode, and keeping the cooling time for 4-5 hours;
step six: punching: fixing the forged piece obtained by the processing in the fifth step by using a punch press, and punching the forged piece by using the punch press;
step seven: connecting and forming a finished product: fixing the forged piece processed in the sixth step by using a fixing frame, welding the steel bar prepared in the first step with the processed forged piece by using an electric welding machine, and performing welding processing according to a specified pattern to obtain a required connecting frame;
step eight: coating: and coating a protective layer paint on the connecting frame processed in the seventh step.
Preferably, when the forgings in the second step, the third step, the fourth step and the fifth step are heated at high temperature, the temperature keeping time in the second step, the third step, the fourth step and the fifth step is shortened, and the temperature cooling time in the second step, the third step, the fourth step and the fifth step is lengthened.
Preferably, the natural cooling in the fifth step refers to cooling by adopting a cooling mode without human intervention, namely, a cooling mode of cooling by utilizing air and a mode of taking away heat of the forged piece by natural flow so that the forged piece temperature casting is cooled down naturally.
Preferably, the environment for the finish forging of the forge piece in the fourth step is a processing environment filled with nitrogen.
Preferably, after the welding processing of the connecting frame processed in the step eight is finished, the tearing resistance and the shearing performance test need to be carried out, and the connecting frame obtained after the processing can be packaged and stored in a warehouse for storage after the tearing resistance and the shearing performance test are finished.
Preferably, the finished connecting frame obtained after the processing in the seventh step is polished and polished according to the processing requirements and the processing degree of the forge piece.
Preferably, the material used for the protective layer coating in the eighth step is a CVD coating.
(III) advantageous effects
Compared with the prior art, the invention provides a trailer connecting frame processing technology, which has the following beneficial effects:
this trailer link processing technology, the process of processing includes the material preparation, forge and preheat, the forging rough forging, the forging finish forging, forge and preheat once more, punch and protective layer coating step, wherein forge and preheat, the forging rough forging, the forging finish forging preheats the processing step once more with forging, heat the forging earlier to 350 degrees centigrade up, water-cooling after that, make inside steel and iron molecular strength improve, heat to 800 degrees centigrade up once more, then treat the forging cooling back, heat the forging to 560 degrees centigrade up, utilize natural cooling's mode, go up the decline to the forging temperature, make the interior molecule of forging reorganization many times, improve the intensity of forging, and then improve the intensity of trailer link.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A trailer connecting frame machining process comprises the following steps:
the method comprises the following steps: preparing materials: preparing a plurality of forgings and a plurality of high-strength steel bars, pre-cutting the forgings by using a numerical control machine, and cutting the steel bars by using a cutting machine to obtain a plurality of steel plates and a plurality of steel bars for later use;
step two: forging and preheating: preheating the forge piece by using a heating furnace, heating the forge piece to 350-380 ℃, setting the time for heating the forge piece to be 1-2 hours, and keeping the forge piece at the temperature for 2-2.5 hours after heating;
step three: forging the forged piece roughly: after the forge piece in the second step is heated and kept for 2-2.5 hours, forging and forming the forge piece according to the specified requirements, rapidly cooling the forge piece in a water cooling mode after the forge piece is forged to be preliminarily formed, keeping the cooled forge piece at the normal temperature for 1-1.5 hours, and entering the fourth step;
step four: fine forging of the forged piece: heating the forging piece cooled for 1-1.5 hours to 800-1000 ℃ by using a heating furnace, setting the heating time of the forging piece to be 20-40 minutes, preserving the heat of the forging piece for 40-60 minutes after the heating is finished, then placing the forging piece into a water tank, cooling the forging piece to 20-30 ℃ by using the water tank, then performing precision forging treatment on the heated forging piece by using a numerical control machine, forging the forging piece to be completely molded, and entering the fifth step;
step five: preheating the forging again: heating the forged piece obtained in the fourth step to 560-580 ℃ by using a heating furnace, then preserving the heat of the forged piece in the heating furnace for 3-4 hours, then cooling the forged piece in a natural cooling mode, and keeping the cooling time for 4-5 hours;
step six: punching: fixing the forged piece processed in the fifth step by using a punch, and punching the forged piece by using the punch;
step seven: connecting and forming a finished product: fixing the forged piece processed in the sixth step by using a fixing frame, welding the prepared steel bar in the first step with the processed forged piece by using an electric welding machine, and performing welding processing according to a specified pattern to obtain a required connecting frame;
step eight: coating: coating a protective layer paint on the connecting frame processed in the step seven;
the process of processing includes the material preparation, forge and preheat, the forging is rough forged, forging finish forging, forge and preheat once more, punch and protective layer coating step, wherein forge and preheat, forging rough forging, forging finish forging and forge preheating process step once more, heat the forging to 350 degrees centigrade up earlier, then the water-cooling, make inside steel molecular strength improve, heat to 800 degrees centigrade up again, then treat the forging cooling back, heat the forging to 560 degrees centigrade up, utilize natural cooling's mode, go up the decline to the forging temperature, make the inside molecule of forging recombine many times, improve the intensity of forging, and then improve the intensity of trailer link.
When the forgings in the second step, the third step, the fourth step and the fifth step are heated at high temperature, the heat preservation temperature keeping time in the corresponding second step, the third step, the fourth step and the fifth step is shortened, and the temperature cooling time in the corresponding second step, the third step, the fourth step and the fifth step is prolonged.
And in the step five, natural cooling refers to cooling which is carried out in a cooling mode without human intervention, namely a cooling mode which utilizes air and natural flow to take away heat of the forged piece so as to naturally cool the forged piece temperature casting.
And in the fourth step, the environment for precisely forging and processing the forge piece is processed by adopting a processing environment filled with nitrogen, so that the strength of the connecting frame is improved.
And eighthly, after the connecting frame which is processed in the step eight is welded, the tearing resistance and the shearing performance test are required to be carried out, and the connecting frame which is obtained after processing can be packaged and stored in a warehouse after the tearing resistance and the shearing performance test are carried out.
And seventhly, polishing and polishing the connecting frame obtained after machining according to the machining requirement and the machining degree of the forge piece, so that the quality of the connecting frame is improved.
And in the step eight, the protective layer coating is made of a CVD coating, so that the connecting frame is prevented from rusting.
This trailer link processing technology, the process of processing includes the material preparation, forge and preheat, the forging rough forging, the forging finish forging, forge and preheat once more, punch and protective layer coating step, wherein forge and preheat, the forging rough forging, the forging finish forging preheats the processing step once more with forging, heat the forging earlier to 350 degrees centigrade up, water-cooling after that, make inside steel and iron molecular strength improve, heat to 800 degrees centigrade up once more, then treat the forging cooling back, heat the forging to 560 degrees centigrade up, utilize natural cooling's mode, go up the decline to the forging temperature, make the interior molecule of forging reorganization many times, improve the intensity of forging, and then improve the intensity of trailer link.
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The processing technology of the trailer connecting frame is characterized in that: the method comprises the following steps:
the method comprises the following steps: preparing materials: preparing a plurality of forgings and a plurality of high-strength steel bars, pre-cutting the forgings by using a numerical control machine, and cutting the steel bars by using a cutting machine to obtain a plurality of steel plates and a plurality of steel bars for later use;
step two: forging and preheating: preheating the forging by using a heating furnace, heating the forging to 350-380 ℃, setting the time for heating the forging to be 1-2 hours, and keeping the forging in a heat preservation state for 2-2.5 hours after the forging is heated;
step three: forging the forged piece roughly: after the forge piece in the second step is heated and kept for 2-2.5 hours, forging and forming the forge piece according to the specified requirements, after forging is carried out until the forge piece is preliminarily formed, rapidly cooling the forge piece in a water cooling mode, keeping the cooled forge piece at the normal temperature, standing for 1-1.5 hours, and entering a fourth step;
step four: fine forging of the forged piece: heating the forge piece cooled for 1-1.5 hours to 800-1000 ℃ by using the heating furnace, setting the heating time of the forge piece to be 20-40 minutes, preserving the heat of the forge piece for 40-60 minutes after the forge piece is heated, then placing the forge piece into a water tank, cooling the forge piece to 20-30 ℃ by using the water tank, then precisely forging the forge piece subjected to heating processing by using a numerical control machine, forging the forge piece to be completely molded, and entering the fifth step;
step five: preheating the forging again: heating the forged piece obtained in the fourth step to 560-580 ℃ by using a heating furnace, then preserving heat of the forged piece in the heating furnace for 3-4 hours, then cooling the forged piece in a natural cooling mode, and keeping the cooling time for 4-5 hours;
step six: punching: fixing the forged piece obtained by the processing in the fifth step by using a punch press, and punching the forged piece by using the punch press;
step seven: connecting and forming a finished product: fixing the forged piece processed in the sixth step by using a fixing frame, welding the steel bar prepared in the first step with the processed forged piece by using an electric welding machine, and performing welding processing according to a specified pattern to obtain a required connecting frame;
step eight: coating: and coating a protective layer paint on the connecting frame processed in the seventh step.
2. The trailer connecting frame machining process as claimed in claim 1, characterized in that: when the forgings in the second step, the third step, the fourth step and the fifth step are heated at high temperature, the holding time of the heat preservation temperature in the second step, the third step, the fourth step and the fifth step is shortened, and the temperature cooling time in the second step, the third step, the fourth step and the fifth step is prolonged.
3. The trailer connecting frame machining process as claimed in claim 1, characterized in that: and in the step five, natural cooling refers to cooling which is carried out in a cooling mode without human intervention, namely a cooling mode which utilizes air and natural flow to take away heat of the forged piece so as to naturally cool the forged piece temperature casting.
4. The trailer connecting frame machining process as claimed in claim 1, characterized in that: and the environment for the fine forging processing of the forge piece in the fourth step is processed by adopting a processing environment filled with nitrogen.
5. The trailer connecting frame machining process as claimed in claim 1, characterized in that: and step eight, after the connecting frame which is processed in the step eight is welded, the tearing resistance and the shearing performance test are required to be carried out, and after the tearing resistance and the shearing performance test of the connecting frame which is obtained after the processing is carried out, the connecting frame can be packaged and stored in a warehouse for storage.
6. The trailer connecting frame machining process as claimed in claim 1, characterized in that: and step seven, polishing and polishing the connecting frame obtained after machining according to machining requirements and the machining degree of the forge piece.
7. The trailer connecting frame machining process as claimed in claim 1, characterized in that: and the material adopted by the protective layer coating in the step eight is a CVD coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911359373.7A CN111097873A (en) | 2019-12-25 | 2019-12-25 | Processing technology of trailer connecting frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911359373.7A CN111097873A (en) | 2019-12-25 | 2019-12-25 | Processing technology of trailer connecting frame |
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| Publication Number | Publication Date |
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| CN111097873A true CN111097873A (en) | 2020-05-05 |
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| CN201911359373.7A Pending CN111097873A (en) | 2019-12-25 | 2019-12-25 | Processing technology of trailer connecting frame |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6471233B1 (en) * | 2001-06-14 | 2002-10-29 | The Heil Co. | Method of converting a refuse collection body to a semi-trailer and a refuse collection semi-trailer |
| CN102990295A (en) * | 2012-09-28 | 2013-03-27 | 江苏永昊高强度螺栓有限公司 | Aviation connecting piece with consistent metal flow and producing method thereof |
| CN103287232A (en) * | 2012-02-28 | 2013-09-11 | 理研精工株式会社 | Towing hook and method for manufacturing the towing hook |
| CN104874719A (en) * | 2015-06-05 | 2015-09-02 | 湖北三环锻造有限公司 | Process for vertically obliquely forging and machining steering knuckles of automobiles |
| CN106041421A (en) * | 2016-06-20 | 2016-10-26 | 安徽省瑞杰锻造有限责任公司 | Stabilizing treatment technology of forged piece machining |
-
2019
- 2019-12-25 CN CN201911359373.7A patent/CN111097873A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6471233B1 (en) * | 2001-06-14 | 2002-10-29 | The Heil Co. | Method of converting a refuse collection body to a semi-trailer and a refuse collection semi-trailer |
| CN103287232A (en) * | 2012-02-28 | 2013-09-11 | 理研精工株式会社 | Towing hook and method for manufacturing the towing hook |
| CN102990295A (en) * | 2012-09-28 | 2013-03-27 | 江苏永昊高强度螺栓有限公司 | Aviation connecting piece with consistent metal flow and producing method thereof |
| CN104874719A (en) * | 2015-06-05 | 2015-09-02 | 湖北三环锻造有限公司 | Process for vertically obliquely forging and machining steering knuckles of automobiles |
| CN106041421A (en) * | 2016-06-20 | 2016-10-26 | 安徽省瑞杰锻造有限责任公司 | Stabilizing treatment technology of forged piece machining |
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