阅读说明：本技术 一种缸套离心铸造工艺 (Centrifugal casting process for cylinder sleeve ) 是由 周国荣 于 2019-12-10 设计创作，主要内容包括：本发明属于汽车零部件铸造加工技术领域,具体涉及一种缸套离心铸造工艺,包括如下步骤：浇铸液熔炼；离心铸造机准备；将浇道移至离心铸造机的浇注口内；浇铸；脱模；脱模的具体方法为：驱动组件驱动卡爪凸伸至筒状模具本体内,同时驱动卡爪沿筒状模具本体径向向缸套内壁靠拢；驱动组件驱动第一端板向第二端板所在方向滑动,第一端板将缸套顶出,第二端板在缸套的作用下与筒状模具本体分离；缸套与筒状模具本体完全分离后,驱动组件驱动卡爪栋缸套内部抽出,缸套在重力作用下向下掉落,完成缸套脱模。本工艺将第一端板和第二端板设置为活动式结构,缸套成型后,利用第一端板将缸套从模具中顶出,实现了铸件的自动脱模,提高了缸套铸造加工效率。(The invention belongs to the technical field of automobile part casting processing, and particularly relates to a cylinder sleeve centrifugal casting process, which comprises the following steps: smelting a casting liquid; preparing a centrifugal casting machine; moving the pouring gate to a pouring gate of a centrifugal casting machine; casting; demolding; the specific method for demolding comprises the following steps: the driving component drives the clamping jaws to protrude into the cylindrical die body, and simultaneously drives the clamping jaws to move close to the inner wall of the cylinder sleeve along the radial direction of the cylindrical die body; the driving assembly drives the first end plate to slide towards the direction of the second end plate, the first end plate pushes out the cylinder sleeve, and the second end plate is separated from the cylindrical die body under the action of the cylinder sleeve; after the cylinder sleeve is completely separated from the cylindrical mold body, the driving assembly drives the clamping jaws to pull out the interior of the multi-span cylinder sleeve, and the cylinder sleeve falls downwards under the action of gravity to complete cylinder sleeve demolding. According to the process, the first end plate and the second end plate are arranged to be movable, and after the cylinder sleeve is formed, the cylinder sleeve is ejected out of the die by the first end plate, so that the automatic demolding of a casting is realized, and the casting processing efficiency of the cylinder sleeve is improved.)

1. A centrifugal casting process of a cylinder sleeve comprises the following steps:

step 1: smelting the casting liquid, namely adding the raw materials into a medium-frequency electric furnace for smelting and slagging off to obtain the casting liquid;

step 2: preparing a centrifugal casting machine, cleaning the inner wall of the centrifugal casting machine, spraying and hanging a coating, and preheating a mould;

and step 3: moving the pouring gate to a pouring gate of a centrifugal casting machine;

and 4, step 4: casting, starting a centrifugal casting machine, pouring the casting liquid into a pouring gate by using a casting ladle, and enabling the casting liquid to flow into a mold through the pouring gate;

and 5: demolding, after the casting is cooled, taking the casting out of the mold, and finishing the casting of the cylinder sleeve;

the method is characterized in that: the centrifugal casting machine comprises a cylindrical die body which is rotatably arranged along a horizontal axis, a first end plate is arranged at the first end of the cylindrical die body, and a second end plate is arranged at the second end of the cylindrical die body; the first end plate and the second end plate are both of annular structures, and are in sliding fit with the cylindrical die body along the axial direction of the cylindrical die body; the centrifugal casting machine further comprises a demoulding device, wherein the demoulding device comprises a clamping jaw which is arranged in a center hole of the first end plate, can be opened and closed along the radial direction of the cylindrical mould body and can move along the axial direction of the cylindrical mould body, and a driving assembly which is arranged beside the cylindrical mould body and is used for driving the first end plate, the second end plate and the clamping jaw to move; in the step 5, the demolding method specifically comprises the following steps:

1) the driving component drives the clamping jaws to protrude into the cylindrical die body, and simultaneously drives the clamping jaws to move close to the inner wall of the cylinder sleeve along the radial direction of the cylindrical die body;

2) the driving assembly drives the first end plate to slide towards the direction of the second end plate, the first end plate pushes out the cylinder sleeve, and the second end plate is separated from the cylindrical die body under the action of the cylinder sleeve;

3) after the cylinder sleeve is completely separated from the cylindrical mold body, the driving assembly drives the clamping jaws to pull out the interior of the multi-span cylinder sleeve, and the cylinder sleeve falls downwards under the action of gravity to complete cylinder sleeve demolding.

2. The cylinder liner centrifugal casting process of claim 1, wherein: the runner comprises a bowl-shaped receiving groove and a fixed flow channel connected with the bowl-shaped receiving groove, a revolving body is sleeved on the fixed flow channel and rotatably arranged along a rotating shaft parallel to the length direction of the fixed flow channel, a movable flow channel is formed in the revolving body and penetrates from the inner ring surface of the revolving body to the outer ring surface of the revolving body, and the movable flow channel is spirally arranged; the movable flow channel is a double-spiral structure symmetrically extending from the middle part of the revolving body to two ends of the revolving body respectively; the end part of the fixed flow channel is correspondingly arranged at the intersection of the double helix; in the step 4, the casting method specifically comprises the following steps:

a. before casting, the angle of the revolving body is adjusted, so that the intersection of the double spirals of the movable flow channel is positioned at the bottom of the revolving body;

b. pouring casting liquid into the material receiving groove by using a casting ladle, wherein the casting liquid flows into the revolving body along the fixed runner, and the revolving body is driven to rotate at a constant speed at the moment so that a liquid outlet at the bottom of the movable runner gradually moves towards two sides of the revolving body;

c. and after all the casting liquid enters the cylindrical die body, drawing out the pouring gate from the cylindrical die body, and finishing the casting process.

3. The cylinder liner centrifugal casting process according to claim 2, wherein: the driving assembly comprises a driving disc, the driving disc is arranged in a sliding mode along the axis direction of the cylindrical die body, the clamping jaw is in a long strip shape, a strip-shaped hole is formed in the clamping jaw, the clamping jaw is in sliding pin joint with a hinged support arranged on the first end plate through the strip-shaped hole, one end of the clamping jaw is hinged with a first guide pillar, the first guide pillar is fixedly connected with the driving disc, and a hinged shaft between the clamping jaw and the first guide pillar is closer to the axis of the cylindrical die body than the hinged support; when the first guide pillar slides towards the second end of the cylindrical die body relative to the first end plate, the included angle between the clamping jaw and the axis of the cylindrical die body is gradually increased, and when the first guide pillar slides towards the first end of the cylindrical die body relative to the first end plate, the included angle between the clamping jaw and the cylindrical die body is gradually decreased.

4. The cylinder liner centrifugal casting process of claim 3, wherein: the driving assembly comprises a driving disc, a shifting fork and an electric cylinder, wherein the driving disc is provided with an annular groove on the outer annular surface, two rollers are symmetrically arranged in the annular groove, the axis of each roller is perpendicular to the axis of the driving disc, the rollers are rotatably arranged on the shifting fork, the driving assembly further comprises the electric cylinder arranged in the direction parallel to the axis of the cylindrical die body, and the shifting fork is fixedly connected with a sliding block of the electric cylinder.

5. The cylinder liner centrifugal casting process of claim 4, wherein: the first end plate is in sliding fit with a first cover plate fixedly arranged at the first end of the cylindrical die body through a second guide pillar; a second cover plate is arranged on the outer side of the second end plate, a heat insulation pad is arranged between the second cover plate and the second end plate, and the second cover plate is in sliding fit with the cylindrical die body through a third guide pillar; the driving assembly further comprises a gear rod arranged on the outer side of the second cover plate, the gear rod is fixedly connected with a sliding block of the electric cylinder, and the gear rod is in blocking connection with the outer side of the second cover plate.

6. The cylinder liner centrifugal casting process of claim 5, wherein: the jack catch sets up 3 at least along the even interval of the circumference of tube-shape mould body.

7. The cylinder liner centrifugal casting process of claim 6, wherein: the diameter of the inner ring surface of the revolving body is gradually increased from the intersection of the double spirals to the two ends of the revolving body.

8. The cylinder liner centrifugal casting process of claim 7, wherein: the bowl-shaped material receiving groove, the fixed runner and the revolving body are all made of high-temperature-resistant ceramics.

9. The cylinder liner centrifugal casting process of claim 8, wherein: the centrifugal casting runner is installed on a sliding seat, the sliding seat is arranged on a sliding rail which is arranged in parallel to the axis of the revolving body in a sliding mode, and the sliding rail is an electric sliding rail.

10. The cylinder liner centrifugal casting process of claim 9, wherein: a rotary driving motor is arranged on the sliding seat, and the rotary body is arranged on a bearing seat arranged on the sliding seat through a bearing; the outer ring surface of the revolving body is provided with a driven gear, a main shaft of the revolving driving motor is provided with a driving gear, and the driving gear is meshed with the driven gear.

Technical Field

The invention belongs to the technical field of automobile part casting and processing, and particularly relates to a centrifugal casting process for a cylinder sleeve.

Background

The engine cylinder sleeve is generally manufactured by adopting a centrifugal casting process, the existing centrifugal casting equipment needs to depend on a large amount of manual operation, for example, the processes of mold closing, pouring, mold opening, mold stripping and the like need to be manually operated, the labor intensity is high, and the production efficiency is low; in addition, the centrifugal casting equipment in the prior art is generally a fixed pouring channel, namely, the casting liquid flows into the mold from a fixed position, so that the casting liquid in the mold is unevenly distributed, the molding period is prolonged, and the cylinder sleeve is easy to generate local internal stress to influence the molding quality of the cylinder sleeve.

Disclosure of Invention

The invention aims to provide a cylinder sleeve centrifugal casting process capable of improving the forming efficiency.

The technical scheme adopted by the invention is as follows:

a centrifugal casting process of a cylinder sleeve comprises the following steps:

step 1: smelting the casting liquid, namely adding the raw materials into a medium-frequency electric furnace for smelting and slagging off to obtain the casting liquid;

step 2: preparing a centrifugal casting machine, cleaning the inner wall of the centrifugal casting machine, spraying and hanging a coating, and preheating a mould;

and step 3: moving the pouring gate to a pouring gate of a centrifugal casting machine;

and 4, step 4: casting, starting a centrifugal casting machine, pouring the casting liquid into a pouring gate by using a casting ladle, and enabling the casting liquid to flow into a mold through the pouring gate;

and 5: demolding, after the casting is cooled, taking the casting out of the mold, and finishing the casting of the cylinder sleeve;

the centrifugal casting machine comprises a cylindrical die body which is rotatably arranged along a horizontal axis, a first end plate is arranged at the first end of the cylindrical die body, and a second end plate is arranged at the second end of the cylindrical die body; the first end plate and the second end plate are both of annular structures, and are in sliding fit with the cylindrical die body along the axial direction of the cylindrical die body; the centrifugal casting machine further comprises a demoulding device, wherein the demoulding device comprises a clamping jaw which is arranged in a center hole of the first end plate, can be opened and closed along the radial direction of the cylindrical mould body and can move along the axial direction of the cylindrical mould body, and a driving assembly which is arranged beside the cylindrical mould body and is used for driving the first end plate, the second end plate and the clamping jaw to move; in the step 5, the demolding method specifically comprises the following steps:

1) the driving component drives the clamping jaws to protrude into the cylindrical die body, and simultaneously drives the clamping jaws to move close to the inner wall of the cylinder sleeve along the radial direction of the cylindrical die body;

2) the driving assembly drives the first end plate to slide towards the direction of the second end plate, the first end plate pushes out the cylinder sleeve, and the second end plate is separated from the cylindrical die body under the action of the cylinder sleeve;

3) after the cylinder sleeve is completely separated from the cylindrical mold body, the driving assembly drives the clamping jaws to pull out the interior of the multi-span cylinder sleeve, and the cylinder sleeve falls downwards under the action of gravity to complete cylinder sleeve demolding.

The runner comprises a bowl-shaped receiving groove and a fixed flow channel connected with the bowl-shaped receiving groove, a revolving body is sleeved on the fixed flow channel and rotatably arranged along a rotating shaft parallel to the length direction of the fixed flow channel, a movable flow channel is formed in the revolving body and penetrates from the inner ring surface of the revolving body to the outer ring surface of the revolving body, and the movable flow channel is spirally arranged; the movable flow channel is a double-spiral structure symmetrically extending from the middle part of the revolving body to two ends of the revolving body respectively; the end part of the fixed flow channel is correspondingly arranged at the intersection of the double helix; in the step 4, the casting method specifically comprises the following steps:

a. before casting, the angle of the revolving body is adjusted, so that the intersection of the double spirals of the movable flow channel is positioned at the bottom of the revolving body;

b. pouring casting liquid into the material receiving groove by using a casting ladle, wherein the casting liquid flows into the revolving body along the fixed runner, and the revolving body is driven to rotate at a constant speed at the moment so that a liquid outlet at the bottom of the movable runner gradually moves towards two sides of the revolving body;

c. and after all the casting liquid enters the cylindrical die body, drawing out the pouring gate from the cylindrical die body, and finishing the casting process.

The driving assembly comprises a driving disc, the driving disc is arranged in a sliding mode along the axis direction of the cylindrical die body, the clamping jaw is in a long strip shape, a strip-shaped hole is formed in the clamping jaw, the clamping jaw is in sliding pin joint with a hinged support arranged on the first end plate through the strip-shaped hole, one end of the clamping jaw is hinged with a first guide pillar, the first guide pillar is fixedly connected with the driving disc, and a hinged shaft between the clamping jaw and the first guide pillar is closer to the axis of the cylindrical die body than the hinged support; when the first guide pillar slides towards the second end of the cylindrical die body relative to the first end plate, the included angle between the clamping jaw and the axis of the cylindrical die body is gradually increased, and when the first guide pillar slides towards the first end of the cylindrical die body relative to the first end plate, the included angle between the clamping jaw and the cylindrical die body is gradually decreased.

The driving assembly comprises a driving disc, a shifting fork and an electric cylinder, wherein the driving disc is provided with an annular groove on the outer annular surface, two rollers are symmetrically arranged in the annular groove, the axis of each roller is perpendicular to the axis of the driving disc, the rollers are rotatably arranged on the shifting fork, the driving assembly further comprises the electric cylinder arranged in the direction parallel to the axis of the cylindrical die body, and the shifting fork is fixedly connected with a sliding block of the electric cylinder.

The first end plate is in sliding fit with a first cover plate fixedly arranged at the first end of the cylindrical die body through a second guide pillar; a second cover plate is arranged on the outer side of the second end plate, a heat insulation pad is arranged between the second cover plate and the second end plate, and the second cover plate is in sliding fit with the cylindrical die body through a third guide pillar; the driving assembly further comprises a gear rod arranged on the outer side of the second cover plate, the gear rod is fixedly connected with a sliding block of the electric cylinder, and the gear rod is in blocking connection with the outer side of the second cover plate.

The jack catch sets up 3 at least along the even interval of the circumference of tube-shape mould body.

The diameter of the inner ring surface of the revolving body is gradually increased from the intersection of the double spirals to the two ends of the revolving body;

the bowl-shaped material receiving groove, the fixed runner and the revolving body are all made of high-temperature-resistant ceramics.

The centrifugal casting runner is installed on a sliding seat, the sliding seat is arranged on a sliding rail which is arranged in parallel to the axis of the revolving body in a sliding mode, and the sliding rail is an electric sliding rail.

A rotary driving motor is arranged on the sliding seat, and the rotary body is arranged on a bearing seat arranged on the sliding seat through a bearing; the outer ring surface of the revolving body is provided with a driven gear, a main shaft of the revolving driving motor is provided with a driving gear, and the driving gear is meshed with the driven gear.

The invention has the technical effects that: according to the centrifugal casting system for the cylinder sleeve, the first end plate and the second end plate are arranged to be movable, and the cylinder sleeve is ejected out of the mold by the first end plate after the cylinder sleeve is formed, so that automatic demolding of a casting is realized, and the casting and processing efficiency of the cylinder sleeve is improved.

Drawings

FIG. 1 is a perspective view of a centrifugal casting system provided by an embodiment of the present invention;

FIG. 2 is a side view of a centrifugal casting system provided by an embodiment of the present invention;

FIG. 3 is a top view of a centrifugal casting system provided by an embodiment of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a perspective view of a demolding device provided in accordance with an embodiment of the present invention;

FIG. 6 is a perspective view showing the internal structure of the ejector according to the embodiment of the present invention;

FIG. 7 is a perspective view of a casting unit provided by an embodiment of the present invention;

fig. 8 is a cross-sectional view of a drive assembly provided by an embodiment of the present invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.