阅读说明：本技术 一种汽车发动机曲轴新型随型小冷铁应用工艺 (Novel conformal small chill application process for automobile engine crankshaft ) 是由 周小龙 张晓锋 龚华林 刘金林 于 2021-10-15 设计创作，主要内容包括：本发明公开了一种汽车发动机曲轴新型随型小冷铁应用工艺,包括曲轴P1连杆、随型小冷铁、随型小冷铁制作模具、随型小冷铁在P1连杆下模模具结构和随型小冷铁在P1连杆上模模具结构,本发明所达到的有益效果是：某曲轴铸造模数8.5mm,对应的P1连杆位置铸造模数10.3mm,导致曲轴P1连杆加工后内侧出现微观缩松缺陷,通过随型小冷铁的使用,完美的解决了曲轴P1连杆位置的加工缩孔缩松缺陷,工艺结构对应曲轴的P1连杆位置设置有一个随型小冷铁,随型小冷铁单重0.04Kg,根据曲轴P1连杆的分型要求,在曲轴模具中分为上下两个部分,位于曲轴下模的模具结构定位部分,以及位于曲轴上模模具结构与P1连杆直接接触部分。(The invention discloses a novel conformal small chill application process of an automobile engine crankshaft, which comprises a crankshaft P1 connecting rod, conformal small chills, a conformal small chill manufacturing mold, a conformal small chill lower mold structure at a P1 connecting rod and a conformal small chill upper mold structure at a P1 connecting rod, and has the following beneficial effects that: the casting modulus of a certain crankshaft is 8.5mm, the casting modulus of the corresponding P1 connecting rod position is 10.3mm, so that the inner side of the processed P1 connecting rod of the crankshaft has the micro shrinkage porosity defect, the processing shrinkage porosity defect of the P1 connecting rod position of the crankshaft is perfectly solved by using the following type small chill, the process structure is provided with the following type small chill corresponding to the P1 connecting rod position of the crankshaft, the weight of the following type small chill is 0.04Kg, the crankshaft mold is divided into an upper part and a lower part according to the parting requirement of the P1 connecting rod of the crankshaft, the mold structure positioning part positioned on the lower mold of the crankshaft and the direct contact part of the mold structure positioned on the upper mold of the crankshaft and the P1 connecting rod.)

1. A novel type-following small chilling block application process of an automobile engine crankshaft is characterized by comprising a crankshaft P1 connecting rod (1), a type-following small chilling block (2), a type-following small chilling block manufacturing mold structure (3), a type-following small chilling block lower mold structure (4) on a P1 connecting rod and a type-following small chilling block upper mold (5) on a P1 connecting rod, wherein the crankshaft P1 connecting rod (1) is provided with the type-following small chilling block (2), the type-following small chilling block lower mold structure (4) on the P1 connecting rod and the type-following small chilling block upper mold structure (5) on the P1 connecting rod are divided into an upper part and a lower part in the crankshaft mold according to the parting requirement of the crankshaft P1 connecting rod (1), the lower mold part of the mold belongs to the positioning part of the type-following small chilling block (2), the corresponding size of the type-following small chilling block lower mold structure is 21 x 10H 15mm, and the distance from the inner side of the crankshaft P1 connecting rod (1) is 16mm, the minimum distance from the side faces of two ends of a connecting rod of a crankshaft P1 is 8mm, the single side of a positioning gap designed by the following type small chiller on a lower die structure (4) of the P1 connecting rod is 0.3-0.5mm, the upper die part positioned on the die belongs to the actual working part of the following type small chiller (2), the corresponding size of the actual working part is 35H 20mm, the corresponding inner side direct contact part with the connecting rod (1) of the crankshaft P1 is 5.5H 6mm, the minimum distance from the side faces of two ends of the connecting rod (1) of the crankshaft P1 is 5mm, and the single side of a die assembly gap designed by the following type small chiller on an upper die structure (5) of the P1 connecting rod is 0.8-1.2 mm.

2. The novel conformal small chilling block application process for the automobile engine crankshaft as claimed in claim 1, wherein the conformal small chilling block (2) is 0.04Kg per unit weight.

3. The application process of the novel conformal small chilling block for the crankshaft of the automobile engine as claimed in claim 1, wherein the conformal small chilling block (2) is in direct contact with the inner side of the P1 connecting rod (1), and the contact area is 33mm²。

Technical Field

The invention relates to a conformal small chilling block application process, in particular to a novel conformal small chilling block application process for an automobile engine crankshaft, and belongs to the technical field of automobile parts.

Background

The automobile engine crankshaft is a large platform-based product and can be applied to various automobile models, a client requires that the crankshaft product connecting rod position cannot have the defect of microcosmic shrinkage porosity after magnetic particle inspection after being processed, namely, the crankshaft product connecting rod position cannot have the defect after being viewed visually, the magnetic particle inspection cannot have the defect after being processed, the appearance and internal quality requirements are very high, and a production enterprise faces severe technical challenges according to the high quality requirements of clients.

In order to meet the requirement on the position quality of a crankshaft connecting rod, the similar products cast by the traditional process at present adopt the following modes: the P1 connecting rod is placed in the following type external chill technology, the weight of the chill is 0.35kg, the whole chill is connected with the P1 connecting rod of the crankshaft, the contact surface with the P1 connecting rod reaches 5500mm2, the subsequent cleaning workload of the chill is extremely large due to the large contact surface with the P1 connecting rod, the chill cannot be cleaned manually, a special press is needed for cleaning, and the cleaning workload is increased. Because the contact surface of the external chill and the connecting rod is large, the coating on the surface of the external chill must be coated in place, otherwise, abnormal coating on the coating can also cause the external chill not to be pressed down by a press, and the contact surface is too large, so that the hardness of the contact surface of the processed corresponding to the chill is higher than that of other positions, and the processing efficiency is influenced.

Therefore, a new crankshaft process structure is needed to be designed, which can ensure the quality of the crankshaft connecting rod product after processing, eliminate the cold iron removing procedure of the press, facilitate the operation and reduce the production cost.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and the technical problem to be solved by the invention is to provide a novel conformal small chill application process for a crankshaft of an automobile engine, wherein the defect of shrinkage cavity and shrinkage porosity in the machining of the position of a connecting rod P1 of the crankshaft is perfectly overcome by using the conformal small chill. Compared with the traditional chilling block process structure, the chilling block has the single weight of only one eighth of the original weight after the novel random small chilling block process structure is adopted, and a special press is not needed for separating the chilling block, so that the production cost is reduced, and the working efficiency is improved. Not only meets the quality requirement of the position of the connecting rod of the product, is convenient to operate, but also reduces the production cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

the novel type-following small chilling block application process for the automobile engine crankshaft comprises a crankshaft P1 connecting rod, a type-following small chilling block manufacturing mold, a type-following small chilling block lower mold structure in a P1 connecting rod and a type-following small chilling block upper mold structure in a P1 connecting rod, wherein a type-following small chilling block is arranged on the crankshaft P1 connecting rod, the crankshaft mold is divided into an upper portion and a lower portion according to the parting requirement of the crankshaft P1 connecting rod, the type-following small chilling block located on the crankshaft lower mold is in the P1 connecting rod lower mold structure, and the type-following small chilling block located on the crankshaft upper mold is in the P1 connecting rod upper mold structure.

Preferably, the weight of the conformal small chilling block is 0.04 Kg.

Preferably, the lower die part of the die belongs to the positioning part of the following small chill, the corresponding size of the positioning part is 21 × 10 × H15mm, the minimum distance from the inner side of a connecting rod of a crankshaft P1 to the side faces of two ends of the connecting rod of the crankshaft P1 is 8mm, and the following small chill is 0.3-0.5mm of the single side of the positioning clearance of the structural design of the lower die of the connecting rod P1.

Preferably, the upper die part of the die belongs to the actual working part of the following small chill, the corresponding size is 35 × 10 × H20mm, the corresponding part in direct contact with the inner side of the connecting rod of the crankshaft P1 is 5.5 × H6mm, the minimum distance from the side faces of two ends of the connecting rod of the crankshaft P1 is 5mm, and the following small chill is designed to have a die closing gap of 0.8-1.2mm on one side in the upper die structure of the connecting rod P1.

Preferably, the conformal small chilling block is directly contacted with the inner side of the P1 connecting rod, and the contact area is 33mm²。

The novel conformal small chilling block application process for the automobile engine crankshaft has the beneficial effects that: the invention provides a novel conformal small chill application process for a crankshaft of an automobile engine, wherein a casting modulus of a certain crankshaft is 8.5mm, and a casting modulus of a corresponding P1 connecting rod position is 10.3mm, so that the inner side of the processed connecting rod of the crankshaft P1 has a microscopic shrinkage porosity defect, and the defect of processing shrinkage porosity at the connecting rod position of the crankshaft P1 is perfectly solved by using the conformal small chill. The process structure is provided with 1 shape-following small chilling block corresponding to the position of a P1 connecting rod of a crankshaft, the single weight of the shape-following small chilling block is 0.04Kg, and the shape-following small chilling block is divided into an upper part and a lower part in a crankshaft mold according to the shape-dividing requirement of the P1 connecting rod of the crankshaft, a mold structure positioning part positioned at a lower mold of the crankshaft, and a part positioned at an upper mold of the crankshaft and in direct contact with the P1 connecting rod. The microcosmic shrinkage porosity defect of the surface of the P1 connecting rod of the crankshaft is in the upper half part of the die, so that the P1 connecting rod is directly contacted with the chilling block when the chilling block is designed, the cooling effect can be enhanced through direct contact, the contact part is similar to a plane part, the contact area of the chilling block and the P1 connecting rod is 33mm2, the contact area is small, and the plane part is similar to a plane area, so that the subsequent chilling block can be conveniently cleaned and separated. Because the chill directly contacts with the position of P1 connecting rod shrinkage porosity, the P1 connecting rod shrinkage porosity defect can be effectively eliminated, and the quality of the product processing surface is improved. According to the conventional process method, the adopted conformal large chilling block process structure is that the chilling block has the weight of 0.35kg, the whole chilling block is connected with a P1 connecting rod of a crankshaft, the contact surface of the chilling block and the P1 connecting rod reaches 5500mm2, and the subsequent cleaning workload of the chilling block is extremely large due to the large contact surface of the chilling block and the P1 connecting rod, so that the chilling block cannot be cleaned manually, a special press is required for cleaning, and the cleaning workload is increased. Compared with the traditional process structure, the single weight of the chilling block is only one eighth of the original weight after the novel random small chilling block process structure is adopted, and a special press is not needed for separating the chilling block, so that the production cost is reduced, and the working efficiency is improved.

Drawings

FIG. 1 is a schematic view of a novel conformal small chilling block of a P1 connecting rod in the application process of the novel conformal small chilling block of the automobile engine crankshaft provided by the invention;

FIG. 2 is a schematic diagram of a mold for manufacturing a conformal small chill in the novel conformal small chill application process of the automobile engine crankshaft provided by the invention;

FIG. 3 is a schematic diagram of a mold structure of a following type small chilling block at a lower mold of a P1 connecting rod in the novel following type small chilling block application process of the automobile engine crankshaft provided by the invention;

FIG. 4 is a schematic diagram of a mold structure of a conformal small chiller on a P1 connecting rod in the novel conformal small chiller application process of the automobile engine crankshaft provided by the invention;

FIG. 5 is a schematic view of a conventional process accompanied by a large chill process.

In the figure: 1. a crankshaft P1 connecting rod; 2. carrying out shape-following small chilling blocks; 3. manufacturing a mould by using the free-form small chill; 4. the following small chill is in a lower die structure of a P1 connecting rod; 5. and (3) forming a mould structure on the P1 connecting rod by the following small chilling block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.

Referring to fig. 1-4, a novel type-following small chill application process of an automobile engine crankshaft comprises a crankshaft P1 connecting rod 1, a type-following small chill 2, a type-following small chill manufacturing mold 3, a type-following small chill lower mold structure 4 on a P1 connecting rod and a type-following small chill upper mold structure 5 on a P1 connecting rod, wherein the crankshaft P1 connecting rod 1 is provided with the type-following small chill 2, the type-following small chill lower mold structure 4 on the P1 connecting rod and the type-following small chill upper mold structure 5 on the P1 connecting rod are divided into an upper portion and a lower portion in the crankshaft mold according to the parting requirement of the crankshaft P1 connecting rod 1.

Preferably, the small shape-following chiller 2 is 0.04Kg in weight, the manufacturing die structure of the chiller is shaped on the same side, the difference of the size of the chiller caused by misalignment in the manufacturing of the chiller can be avoided, the chiller is manufactured into a step type, and the subsequent cleaning is convenient.

Preferably, the lower die part of the die belongs to the positioning part of the following small chill 2, the corresponding size of the positioning part is 21 × 10 × H15mm, the positioning part is 16mm away from the inner side of the connecting rod 1 of the crankshaft P1, the minimum distance from the side faces of two ends of the connecting rod of the crankshaft P1 is 8mm, so as to ensure the requirement of stripping the die and the requirement that the lower chill does not damage a sand mold cavity, and the following small chill is designed to have a positioning gap of 0.3-0.5mm on one side in the lower die structure 4 of the P1 connecting rod, so that the following small chill is not tight when the lower chill is used, and meanwhile, the following small chill is prevented from being too loose.

Preferably, the upper die part of the mold belongs to the actual working part of the free-form small chill 2, the corresponding size is 35 × 10 × H20mm, the corresponding part in direct contact with the inner side of the connecting rod 1 of the crankshaft P1 is 5.5 × H6mm, the minimum distance from the side faces of two ends of the connecting rod 1 of the crankshaft P1 is 5mm, the distance meets the requirements of the mold drawing process, the free-form small chill is designed to have a mold closing gap of 0.8-1.2mm on one side of the mold structure 5 on the P1 connecting rod, and the mold closing after the lower chill is ensured not to have abnormalities such as sand making and the like.

Preferably, the conformal small chilling block 2 is directly contacted with the inner side of the P1 connecting rod 1, and the contact area is 33mm²The conventional process method adopts a conformal large chill process structure, the weight of a chill is 0.35kg, the whole chill is connected with a P1 connecting rod of a crankshaft, the contact surface with a P1 connecting rod reaches 5500mm2, and the subsequent cleaning workload of the chill is very large due to the large contact surface with a P1 connecting rod, so that the chill cannot be cleaned manually, a special press is required for cleaning, and the cleaning workload is increased. Compared with the traditional chilling block process structure, the chilling block has the single weight of only one eighth of the original weight after the novel random small chilling block process structure is adopted, and a special press is not needed for separating the chilling block, so that the production cost is reduced, and the working efficiency is improved.

In summary, the process structure provided by the invention comprises that the following type small chilling block mold 3 structure is divided into an upper part and a lower part in the crankshaft mold, the lower mold part positioned on the mold structure belongs to the positioning part of the following type small chilling block 2, the corresponding size of the positioning part is 21 x 10 x H15mm, the positioning part is 16mm away from the inner side of the connecting rod 1 of the crankshaft P1, and the minimum distance from the side surfaces of two ends of the connecting rod of the crankshaft P1 is 8mm, so that the mold drawing requirement and the requirement that the lower chilling block does not damage a sand mold cavity are ensured. The die structure is designed with the positioning part of the small chilling block 2 with the size, the positioning clearance is 0.3-0.5mm on one side, tightness during chilling block descending is ensured, and excessive looseness of the chilling block is avoided. The mould structure of the conformal small chilling block is divided into an upper part and a lower part in the crankshaft mould, the upper mould part positioned on the mould structure belongs to the actual working part of the conformal small chilling block 2, the corresponding size of the upper mould part is 35 x 10 x H20mm, the corresponding part in direct contact with the inner side of a crankshaft P1 connecting rod 1 is 5.5 x H6mm, and the direct contact area is 33mm²The minimum distance from the side faces of the two ends of the connecting rod 1 of the crankshaft P1 is 5mm, and the distance meets the requirement of the stripping process. The mold structure is designed with the mold closing clearance of 0.8-1.2mm along with the actual working part of the small chill, so that the abnormality of sand making and the like can be avoided after the chill is put into a mold box. The conformal small chiller 2 is directly contacted with the inner side of the P1 connecting rod 1, and the contact area is 33mm 2. Tradition ofThe process method adopts a conformal large chill process structure, the weight of the chill is 0.35kg, the whole chill is connected with a P1 connecting rod of a crankshaft, the contact surface with the P1 connecting rod reaches 5500mm2, and the subsequent cleaning workload of the chill is extremely large due to the large contact surface with the P1 connecting rod, the chill cannot be cleaned manually, a special press is required for cleaning, and the cleaning workload is increased. Compared with the traditional chilling block process structure, the chilling block has the single weight of only one eighth of the original weight after the novel random small chilling block process structure is adopted, and a special press is not needed for separating the chilling block, so that the production cost is reduced, and the working efficiency is improved. Therefore, the invention effectively overcomes the defects of the prior art and has high industrial utilization value.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.