阅读说明：本技术 一种曲轴的垂直分型排布浇注系统及浇注工艺 (Vertical parting arrangement pouring system and pouring process for crankshaft ) 是由 洪军 黄克俊 代伟 张建 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种曲轴的垂直分型排布浇注系统及浇注工艺,涉及曲轴浇注技术领域。本发明包括横浇道、连接在横浇道下部的三个竖浇道、对称连接在竖浇道周侧的压边、连接在竖浇道下部的薄片、连接在薄片一端与压边连接的竖向曲柄、反向搭接在位于三个压边中间处的压边下部的直浇浇道、连接在直浇浇道两端的横向曲柄。本发明通过竖向曲柄竖直放置,且从压边和薄片两道入水,增加入水时的水流量,加快了竖向曲柄浇注速度；通过设置薄片可过滤铁水杂质,压边便于对向上铁水减压,减缓浇注速度,便于减少竖向曲柄冲砂。(The invention discloses a pouring system and a pouring process for vertical parting arrangement of a crankshaft, and relates to the technical field of crankshaft pouring. The invention comprises a horizontal pouring channel, three vertical pouring channels connected with the lower part of the horizontal pouring channel, blank holders symmetrically connected with the peripheral sides of the vertical pouring channels, a thin sheet connected with the lower part of the vertical pouring channels, a vertical crank connected with one end of the thin sheet and connected with the blank holders, a straight pouring channel reversely lapped on the lower part of the blank holders positioned in the middle of the three blank holders, and transverse cranks connected with the two ends of the straight pouring channel. According to the invention, the vertical crank is vertically arranged, and water enters from the blank holder and the sheet, so that the water flow during water entering is increased, and the pouring speed of the vertical crank is accelerated; through setting up the thin slice filterable molten iron impurity, the blank holder is convenient for to the molten iron decompression that makes progress, slows down pouring speed, is convenient for reduce vertical crank sand washing.)

1. The utility model provides a pouring system is arranged in perpendicular somatotype of bent axle which characterized in that includes: the novel vertical pouring gate comprises a horizontal pouring gate (1), three vertical pouring gates (2) connected to the lower portion of the horizontal pouring gate (1), blank pressing portions (3) symmetrically connected to the peripheral sides of the vertical pouring gates (2), a sheet (4) connected to the lower portion of the vertical pouring gates (2), vertical cranks (5) connected to one ends of the sheet (4) and connected with the blank pressing portions (3), straight pouring gates (6) reversely overlapped at the lower portions of the blank pressing portions (3) located in the middle of the three blank pressing portions (3), and transverse cranks (7) connected to two ends of the straight pouring gates (6).

2. A vertically parted arrangement gating system for crankshafts, as in claim 1, characterised in that the lamellae (4) are cross-shaped lamellae, the upper part of the transverse runner (1) being connected to the gates (8).

3. The vertical parting, arranging and pouring process of the crankshaft is characterized by comprising the following steps of:

step one, checking a material to be processed,

mixing new sand, new and old mixed sand, bentonite and mixed powder according to a certain proportion, and molding the mixed sand material by a molding machine;

step three, weighing a certain mass of the materials after the sand mulling, and then smelting the materials;

pouring the smelted molten iron into a mold, and obtaining a finished product after the molten iron is molded;

step five, detecting a finished product, and separating the die from the finished product by using an iron hammer or a riser separator during separation, wherein the product body cannot be directly knocked;

step six, performing shot blasting and polishing on the finished product, wherein the polishing standards are no sprue gate residue, no burr and no flash;

and seventhly, boxing, and performing rust prevention treatment on the finished product, wherein the rust prevention treatment is to uniformly spray rust prevention oil on the outer side of the finished product.

4. The vertical parting arrangement pouring process of a crankshaft as claimed in claim 3, wherein in the second step, the new sand is 0-50kg, the new and old mixed sand is 1800-2500kg, the bentonite is 0-15kg, the mixed powder is 20-40kg, the sand mixing time is 130-180S, the water content is 3.1-3.8%, the wet pressure strength is 0.17-0.185 Pa, the mud content is 9-12%, and the blue absorption is 7-9.5%, wherein the ignition decrement is 3.5-4.5.

5. The vertical parting arrangement pouring process of the crankshaft as claimed in claim 3, wherein in the second step, the extrusion force during molding of the molding machine is 9-12 KP, the sand shooting pressure is 1.5-2.5 bar, the sand mold thickness is 190-300mm, and the mold assembling force is 50-62 bar.

6. The vertical parting arrangement pouring process of a crankshaft as claimed in claim 3, wherein the weight of the materials weighed in the third step is 500kg of pig iron, 2100kg of scrap steel and 4000kg of scrap iron.

7. The process of claim 3, wherein the melting temperature in step three is 1550-1580 ℃.

8. The casting process for vertical parting arrangement of a crankshaft as claimed in claim 3, wherein the casting temperature in the fourth step is 1380-.

9. The process of claim 3, wherein the melted molten iron is taken out for transfer in the fourth step, wherein the temperature of the transferred molten iron is 1550-1580 ℃, the wire feeding temperature TE crankshaft 1480-1500 ℃ and the normal crankshaft 1460-1480 ℃.

10. The process of claim 3, wherein the detection criteria in step five are: the hardness is 190-270HR, the tensile strength is more than or equal to 600MPa, and the elongation is as follows: 3% or more, elastic modulus: over 155GPa, spheroidization rate: more than 80%, spheroidization grading is more than 3 grades, and the graphite length is as follows: 5-6 grade, pearlite more than or equal to 50 percent and cementite less than 1 percent.

Technical Field

The invention belongs to the technical field of crankshaft pouring, and particularly relates to a vertical parting arrangement pouring system and a pouring process for a crankshaft.

Background

The crankshaft is the most important component in the engine. It takes the force from the connecting rod and converts it into torque to be output by the crankshaft and drive other accessories on the engine. The crankshaft is subjected to the combined action of centrifugal force of the rotating mass, gas inertia force of periodic variation and reciprocating inertia force, so that the crankshaft is subjected to the action of bending and twisting load. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the surface of the journal needs to be wear-resistant, work uniformly and balance well.

However, the existing crankshaft pouring efficiency is low, and the pouring quality is affected by sand washing easily during pouring.

Disclosure of Invention

The invention aims to provide a pouring system and a pouring process for vertical parting arrangement of a crankshaft, and solves the technical problems that the existing crankshaft is low in pouring efficiency and easy to wash sand during pouring.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the utility model provides a gating system is arranged in perpendicular somatotype of bent axle, includes the cross gate, connects at the three vertical runner of cross gate lower part, the blank pressing of symmetric connection all sides at the vertical runner, connects at the thin sheet of vertical runner lower part, connects at the vertical crank that thin sheet one end and blank pressing are connected, reverse overlap joint is in the sprue gate, the horizontal crank at sprue both ends of connecting of the blank pressing lower part of locating in the middle of the three blank pressing.

Optionally, the sheet is a cross-shaped sheet, and the upper part of the horizontal runner is connected with a pouring gate.

A vertical parting arrangement pouring process of a crankshaft comprises the following steps:

step one, checking a material to be processed,

mixing new sand, new and old mixed sand, bentonite and mixed powder according to a certain proportion, and molding the mixed sand material by a molding machine;

step three, weighing a certain mass of the materials after the sand mulling, and then smelting the materials;

pouring the smelted molten iron into a mold, and obtaining a finished product after the molten iron is molded;

step five, detecting a finished product, and separating the die from the finished product by using an iron hammer or a riser separator during separation, wherein the product body cannot be directly knocked;

step six, performing shot blasting and polishing on the finished product, wherein the polishing standards are no sprue gate residue, no burr and no flash;

and seventhly, boxing, and performing rust prevention treatment on the finished product, wherein the rust prevention treatment is to uniformly spray rust prevention oil on the outer side of the finished product.

Optionally, in the second step, the new sand is 0-50kg, the new and old mixed sand is 1800-2500kg, the bentonite is 0-15kg, the mixed powder is 20-40kg, the sand mixing time is 130-180S, the moisture content is 3.1-3.8%, the wet pressure strength is 0.17-0.185 Pa, the mud content is 9-12%, the blue absorption is 7-9.5%, and the ignition loss is 3.5-4.5%.

Optionally, in the second step, the extrusion force of the molding machine during molding is 9-12 KP, the sand shooting pressure is 1.5-2.5 bar, the thickness of the sand mold is 190-300mm, and the mold assembling force is 50-62 bar.

Optionally, the weight of the materials weighed in the third step is 500kg of pig iron, 2100kg of scrap steel and 4000kg of scrap material.

Optionally, the smelting temperature in the third step is 1550-1580 ℃.

Optionally, in the fourth step, the casting temperature is 1380-.

Optionally, the melted molten iron is taken out for transfer in the fourth step, wherein the temperature of the transferred molten iron is 1550-1580 ℃, the wire feeding temperature TE crankshaft 1480-.

Optionally, the detection standard in the step five is as follows: the hardness is 190-270HR, the tensile strength is more than or equal to 600MPa, and the elongation is as follows: 3% or more, elastic modulus: over 155GPa, spheroidization rate: more than 80%, spheroidization grading is more than 3 grades, and the graphite length is as follows: 5-6 grade, pearlite more than or equal to 50 percent and cementite less than 1 percent.

The embodiment of the invention has the following beneficial effects:

according to the embodiment of the invention, the vertical crank is vertically arranged, and water enters from the blank holder and the sheet, so that the water flow during water entering is increased, and the pouring speed of the vertical crank is accelerated; the thin sheets are arranged, so that impurities in molten iron can be filtered, the pressure of the blank holder is convenient to reduce the pressure of upward molten iron, the pouring speed is reduced, and the sand washing of a vertical crank is convenient to reduce; when in pouring, the thin sheet is firstly poured into water below the vertical crank, and then the water is poured from the blank holder after a certain amount of molten iron is arranged below the vertical crank, so that the molten iron at the blank holder can fall into the molten iron poured from the thin sheet, and sand washing can be prevented; through the arrangement of the direct pouring gate, the transverse crank can be conveniently and quickly poured into water directly; through the reverse lap joint of the thin sheet and the straight pouring gate, the sand washing is reduced, and the transverse crank pouring gate adopts the straight pouring pressurization pouring, so that the pouring speed is improved.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic perspective view of an embodiment of the present invention.

Wherein the figures include the following reference numerals:

the device comprises a horizontal pouring channel 1, a vertical pouring channel 2, a blank holder 3, a sheet 4, a vertical crank 5, a straight pouring channel 6, a horizontal crank 7 and a pouring gate 8.

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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.

Referring to fig. 1, in the present embodiment, a vertical parting arrangement gating system for a crankshaft is provided, including: the device comprises a horizontal pouring gate 1, three vertical pouring gates 2 connected to the lower part of the horizontal pouring gate 1, blank holders 3 symmetrically connected to the peripheral sides of the vertical pouring gates 2, a thin sheet 4 connected to the lower part of the vertical pouring gates 2, a vertical crank 5 connected to one end of the thin sheet 4 and connected with the blank holders 3, a straight pouring gate 6 reversely lapped on the lower part of the blank holders 3 positioned in the middle of the three blank holders 3, and transverse cranks 7 connected to two ends of the straight pouring gate 6;

the sheet 4 is a cross-shaped sheet, and the upper part of the horizontal pouring channel 1 is connected with a pouring gate 8.

The vertical crank 5 is vertically arranged, and water enters from the two sides of the blank holder 3 and the thin sheet 4, so that the water flow during water entering is increased, and the pouring speed of the vertical crank 5 is accelerated;

the thin sheets 4 are arranged to filter impurities in molten iron, and the blank holders 3 are convenient for reducing pressure of upward molten iron, slowing down the pouring speed and reducing sand washing of the vertical crank 5;

when in pouring, the thin sheet 4 is firstly poured into water below the vertical crank 5, and then is poured into water from the blank holder 3 after a certain amount of molten iron is arranged below the vertical crank 5, so that the molten iron at the blank holder 3 can fall into the molten iron from the thin sheet 4, and sand washing can be prevented;

through the arrangement of the direct pouring gate 6, the transverse crank 7 can be conveniently and directly poured with water;

through the reverse overlap joint of the sheet 4 and the straight pouring gate 6, the sand washing is reduced, and the pouring gate of the transverse crank 7 adopts the straight pouring pressurization pouring, so that the pouring speed is improved.

A vertical parting arrangement pouring process of a crankshaft comprises the following steps:

step one, checking a material to be processed,

mixing new sand, new and old mixed sand, bentonite and mixed powder according to a certain proportion, and molding the mixed sand material by a molding machine, wherein the new sand is 0-50kg, the new and old mixed sand is 1800-2500kg, the bentonite is 0-15kg, the mixed powder is 20-40kg, the sand mixing time is 130-180S, the water content is 3.1-3.8%, the wet pressure strength is 0.17-0.185 Pa, the mud content is 9-12%, the blue absorption amount is 7-9.5%, the ignition decrement is 3.5-4.5, the extrusion force during molding by the molding machine is 9-12 KP, the sand shooting pressure is 1.5-2.5 bar, the sand mold thickness is 190-300mm, and the mold assembly force is 50-62 bar;

step three, weighing a certain mass of the materials after sand mixing, and then smelting the materials, wherein the weighed materials comprise 500kg of pig iron, 2100kg of scrap steel and 4000kg of foundry returns, and the smelting temperature is 1550-1580 ℃;

taking out the melted molten iron from the melted molten iron, transferring the melted molten iron, pouring the transferred molten iron into a mold, and obtaining a finished product after the molten iron is molded, wherein the pouring temperature is 1380-;

step five, detecting the finished product, separating the die from the finished product, separating by using an iron hammer or a riser separator during separation, and not directly knocking the product body, wherein the detection standard is as follows: the hardness is 190-270HR, the tensile strength is more than or equal to 600MPa, and the elongation is as follows: 3% or more, elastic modulus: over 155GPa, spheroidization rate: more than 80%, spheroidization grading is more than 3 grades, and the graphite length is as follows: 5-6 grade, pearlite is more than or equal to 50 percent, and cementite is less than 1 percent;

step six, performing shot blasting and polishing on the finished product, wherein the polishing standards are no sprue gate residue, no burr and no flash;

and seventhly, boxing, and performing rust prevention treatment on the finished product, wherein the rust prevention treatment is to uniformly spray rust prevention oil on the outer side of the finished product.

The above embodiments may be combined with each other.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.