CN215879849U - Casting mould is used in connecting rod processing - Google Patents

Abstract

The utility model belongs to the technical field of casting molds, and particularly relates to a casting mold for machining a connecting rod, which comprises an upper mold, a lower mold, a material ejecting mechanism and a power mechanism, wherein the upper mold is provided with a first mold cavity and a second mold cavity; the upper die is provided with an upper die liquid separating cavity and at least one upper die cavity communicated with the upper die liquid separating cavity, and the upper die is provided with a pouring gate; the lower die is provided with a lower die liquid distribution cavity and at least one lower die groove communicated with the lower die liquid distribution cavity, the lower die is connected with a forming block in a sliding manner, the forming block and the lower die groove can form a lower die cavity in a surrounding manner, and the upper die cavity and the lower die cavity form a forming die cavity of the connecting rod casting; the forming block is provided with an inclined hole inclined towards one side of the lower die cavity, the upper die is provided with an inclined rod capable of being inserted into the inclined hole, and the forming block and the lower die cavity are surrounded to form a lower die cavity under the action of the inclined rod during die assembly. This scheme of use, lower die cavity enclose by shaping piece and lower die cavity and close and constitute, and the lower die cavity is kept away from automatically to shaping piece during the branch mould for lower die cavity is by the split, can not be inhaled during the connecting rod drawing of patterns, and the connecting rod can be comparatively easy drawing of patterns under liftout mechanism's effect.

Description

Casting mould is used in connecting rod processing

Technical Field

The utility model belongs to the technical field of casting molds, and particularly relates to a casting mold for machining a connecting rod.

Background

The connecting rod is connected with the piston and the crankshaft, and transmits acting force borne by the piston to the crankshaft, so that reciprocating motion of the piston is converted into rotating motion of the crankshaft. The connecting rod is one of key parts of an engine and is formed by connecting a connecting rod body and a connecting rod cover through bolts. The forming method of the connecting rod comprises two processes of casting and die forging, wherein the casting is a common means for producing the connecting rod, and a casting mould is required for producing the connecting rod by using the casting process. The existing casting mold comprises an upper mold, a lower mold and an ejection mechanism, wherein an upper mold cavity is arranged in the upper mold, a lower mold cavity is arranged in the lower mold, when the upper mold and the lower mold are closed, the upper mold cavity and the lower mold are combined into a closed mold cavity for forming a connecting rod, molten aluminum is poured into the mold cavity, and the connecting rod is formed after the molten aluminum is cooled. After the upper die and the lower die are separated, the ejection mechanism ejects the connecting rod in the upper die cavity, so that the demoulding of the connecting rod is realized. The following problems are present in the demolding process using the existing casting mold: because the connecting rod and the lower die cavity form a closed space, when the connecting rod is gradually ejected out by the ejection mechanism, the pressure in the lower die cavity is reduced, and the connecting rod is absorbed in the lower die cavity under the action of pressure difference, so that the connecting rod is difficult to demold.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a casting mold for machining a connecting rod, and aims to solve the problem that the connecting rod is difficult to demould due to the fact that the connecting rod is sucked in a lower mold cavity when the connecting rod is demoulded by using the existing mold for casting the connecting rod.

In order to achieve the purpose, the scheme of the utility model is as follows: the casting mould for processing the connecting rod comprises an upper mould, a lower mould, a material ejecting mechanism and a power mechanism for driving the lower mould to move up and down; the upper die is provided with an upper die liquid separating cavity and at least one upper die cavity communicated with the upper die liquid separating cavity, and the upper die is provided with a pouring channel communicated with the upper die liquid separating cavity; the lower die is provided with a lower die liquid distribution cavity and at least one lower die groove communicated with the lower die liquid distribution cavity, the lower die is slidably connected with a forming block opposite to the lower cavity, the forming block and the lower die groove can form a lower die cavity in a surrounding manner, and the upper die cavity and the lower die cavity form a forming die cavity of the connecting rod casting; the forming block is provided with an inclined hole inclined towards one side of the lower die cavity, the upper die is provided with an inclined rod capable of being inserted into the inclined hole, and the forming block and the lower die cavity are surrounded to form a lower die cavity under the action of the inclined rod during die assembly.

The working principle of the scheme is as follows: when the connecting rod is cast, the lower die is driven to move upwards through the power mechanism, in the process, the inclined hole in the forming block gradually extends into the inclined rod, the forming block gradually moves towards one side of the lower die cavity under the action of the inclined rod, when the upper die and the lower die are combined, the forming block and the lower die cavity are enclosed to form a lower die cavity, and the lower die cavity and the upper die cavity are enclosed to form a forming die cavity. Add aluminium liquid through watering, aluminium liquid gets into and goes up the mould and divide the liquid chamber that liquid chamber and lower mould constitute, then flow into the shaping die cavity gradually, after the connecting rod foundry goods cooling shaping in the shaping die cavity, through power unit drive lower mould downstream, at the down in-process of lower mould, the effort is applyed to the shaping piece to the down pole for the shaping piece is to keeping away from lower die groove one side motion, and lower die cavity is split, and lower die groove can not form sealed space with the connecting rod foundry goods. And ejecting the connecting rod casting in the lower die cavity through an ejection mechanism after die parting.

The beneficial effect of this scheme lies in: in the scheme, the lower die cavity is formed by surrounding a forming block and a lower die groove, the forming block moves spontaneously under the action of an inclined rod in the processes of die assembly and die separation, and the forming block and the lower die groove surround to form a lower die cavity during die assembly, so that aluminum liquid can be formed in the forming die cavity formed by the upper die cavity and the lower die cavity; the automatic die cavity of keeping away from of shaping piece during the branch mould for lower die cavity is split, and connecting rod and lower die cavity can't form inclosed space, and when drawing of patterns to the connecting rod, the connecting rod can not be inhaled, ensures that the connecting rod can comparatively easy drawing of patterns under liftout mechanism's effect.

Optionally, the power mechanism includes a frame, an oil cylinder mounted on the frame, and a mounting plate fixed on a piston rod of the oil cylinder, the mounting plate is located below the lower die, and a transmission rod is connected between the mounting plate and the lower die. The upper die on the mounting plate and the mounting plate is driven to lift by the oil cylinder, so that the die closing action of the upper die and the lower die is realized, the operation is convenient and fast, and the time and the labor are saved.

Optionally, the material ejecting mechanism comprises a push plate and a plurality of ejector rods arranged on the push plate; the push plate is positioned above the mounting plate, and the upper part of the transmission rod penetrates through the mounting plate; the lower die is provided with a mandril hole communicated with the lower die cavity, and the mandril is connected to the mandril hole in a sliding way; a limit groove is formed on the rack, and a bulge connected in the limit groove in a sliding manner is arranged on the push plate; when the push plate is contacted with the mounting plate, the ejector rod is positioned at the bottom of the lower die cavity. When the mounting plate moves upwards to a certain position, the mounting plate is contacted with the bottom surface of the push plate, the ejector rod on the push plate extends into the top end of the ejector rod hole and is just positioned at the bottom of the lower die cavity, and the mounting plate drives the lower die and the push plate to move upwards continuously until the lower die and the upper die are matched. And after the aluminum liquid is poured, the connecting rod is preliminarily molded, the mounting plate and the lower die are driven to move downwards by the oil cylinder, and the push plate moves downwards under the action of self gravity at the moment. When the mounting plate goes down to a certain position, the push plate moves to the lower limit position, the mounting plate continues to drive the lower die to go down, and the ejector rod on the push plate extends into the lower die cavity to eject the connecting rod casting in the lower die cavity, so that discharging is realized.

Optionally, a filter screen is arranged in the pouring channel. The filter screen can filter the impurity in the filled aluminium liquid, avoids impurity entering foundry goods, improves the product quality of foundry goods.

Optionally, 4 lower mold grooves are arranged, 2 lower mold grooves are distributed on the left side and the right side of the lower mold respectively, and the lower mold grooves on the left side and the right side are symmetrically arranged; the lower die liquid distribution cavity is positioned in the middle of the 4 lower die cavities; the equal sliding connection in left and right sides of lower mould has the shaping piece, and 2 lower die slot cooperations of a shaping piece and homonymy can enclose and close 2 die cavities down that form. Set up like this, rational in infrastructure, 4 connecting rod castings can be produced to the compound die of once moreover, effectively improve production efficiency.

Optionally, the lower die is provided with a dovetail groove, and the molding block is provided with a sliding block connected in the dovetail groove in a sliding manner. The dovetail groove has a guiding function to the movement of the forming block, so that the forming block can be stably and slidably connected to the lower die.

Optionally, a guide groove is formed in the upper die, and a guide rod connected in the guide groove in a sliding manner is arranged on the lower die. Through setting up guide bar, guide way, realize going up the stable compound die of mould and lower mould, improve the stability of going up mould and lower mould motion.

Optionally, a shunting cone located in the lower die liquid-separating cavity is arranged on the lower die. The shunting cone has the function of guiding the flow of the aluminum liquid, so that the aluminum liquid can flow and be distributed better.

Drawings

FIG. 1 is a plan view of a lower mold of a casting mold for machining a connecting rod according to the present invention (when not closed);

FIG. 2 is a plan view of a lower mold of the casting mold for connecting rod processing according to the present invention (at the time of mold closing);

FIG. 3 is a sectional view taken along the line A-A in FIG. 2 (FIG. 3 completes the upper mold and the frame not shown in FIG. 2);

fig. 4 is a left-side sectional view (at the time of mold clamping) of the casting mold for connecting rod working according to the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises an upper die 10, an upper die cavity 11, an inclined rod 12, a lower die 20, a lower die cavity 21, a shunting cone 22, a lower die liquid distribution cavity 23, a forming block 24, an inclined hole 241, a guide rod 25, a push plate 30, a top rod 31, a protrusion 32, a mounting plate 40, a transmission rod 41, a rack 50 and a limiting groove 51.

As shown in fig. 1 to 4, the casting mold for machining the connecting rod includes an upper mold 10, a lower mold 20, an ejector mechanism, and a power mechanism for driving the lower mold 20 to move up and down. The upper die 10 is provided with 4 guide grooves, and the lower die 20 is fixed with a guide rod 25 which is connected in the guide grooves in a sliding way. The power mechanism comprises a frame 50, an oil cylinder and a mounting plate 40 welded on a piston rod of the oil cylinder, and the oil cylinder is fixedly mounted on the frame 50. The mounting plate 40 is located below the lower mold 20, 4 transmission rods 41 are connected between the mounting plate 40 and the lower mold 20, and the mounting plate 40 drives the lower mold 20 to move together through the transmission rods 41.

The lower die 20 is provided with 4 lower die grooves 21 and 1 lower die liquid distribution cavity 23 which are communicated with the lower die grooves 21, the left side and the right side of the lower die 20 are respectively distributed with 2 lower die grooves 21, and the lower die grooves 21 on the left side and the right side are symmetrically arranged; the lower die liquid distribution cavity 23 is positioned in the middle of the area enclosed by the 4 lower die grooves 21. A shunting cone 22 positioned in a lower die liquid distribution cavity 23 is fixed on the lower die 20, and the shunting cone 22 has a flow guiding effect on the aluminum liquid. The left side and the right side of the lower die 20 are both connected with forming blocks 24 in a sliding mode, specifically, dovetail grooves are formed in the lower die 20, and sliding blocks connected in the dovetail grooves in a sliding mode are welded on the forming blocks 24. A forming block 24 can be matched with 2 lower die cavities 21 on the same side to form 2 lower die cavities in a surrounding mode.

Go up mould 10 fixed mounting on frame 50, go up the last mould that is equipped with 4 last die cavities 11 and 1 on mould 10 and all communicates with last die cavity 11 and divide the sap cavity, go up the left and right sides equipartition of mould 10 and have put 2 last die cavities 11, go up the last die cavity 11 symmetry setting of mould 10 left and right sides, go up the middle part that the sap cavity that divides is located 4 last die cavity 11 enclosure and become the region. The 4 upper cavities 11 are opposed to the 4 lower cavities 21, respectively. When the die is closed, the upper die cavity 11 and the lower die cavity are spliced to form a molding die cavity of the connecting rod casting; the upper mold liquid distribution cavity and the lower mold liquid distribution cavity 23 are spliced to form a liquid distribution cavity. The upper die 10 is also provided with a pouring channel communicated with the liquid separating cavity of the upper die, and the pouring channel is internally provided with a filter screen. The forming block 24 is provided with an inclined hole 241 inclined towards one side of the lower die cavity 21, an inclined rod 12 capable of being inserted into the inclined hole 241 is fixed on the upper die 10, when the die is closed, the inclined rod 12 extends into the inclined hole 241, and the forming block 24 and the lower die cavity 21 are enclosed to form a lower die cavity under the action of the inclined rod 12.

The ejection mechanism comprises a push plate 30 and a plurality of ejector rods 31 welded on the push plate 30, the push plate 30 is positioned above the mounting plate 40, and the upper part of the transmission rod 41 penetrates through the mounting plate 40. The lower die 20 is provided with a mandril hole communicated with the lower die cavity, and the mandril 31 extends into the mandril hole and is connected with the mandril hole in a sliding way. The left side and the right side of the rack 50 are both provided with limiting grooves 51, the push plate 30 is welded with bulges 32 which are connected in the limiting grooves 51 in a sliding manner, and the motion range of the push plate 30 is limited under the action of the limiting grooves 51. When the push plate 30 contacts the mounting plate 40, the ejector rod 31 extends into the top end of the ejector rod hole and is just positioned at the bottom of the lower mold cavity.

When the connecting rod is cast, the oil cylinder drives the mounting plate 40 and the lower die 20 on the mounting plate 40 to move upwards, when the mounting plate 40 moves upwards to a certain position, the mounting plate 40 is contacted with the bottom surface of the push plate 30, at the moment, the ejector rod 31 on the push plate 30 extends into the top end of the ejector rod hole and is just positioned at the bottom of the lower die cavity, and the mounting plate 40 drives the lower die 20 and the push plate 30 to move upwards continuously until the lower die 20 and the upper die 10 are matched.

During the process of the upper die 20 moving upwards, the inclined hole 241 on the forming block 24 gradually extends into the inclined rod 12, the forming block 24 gradually moves towards one side of the lower die cavity 21 under the action of the inclined rod 12, when the upper die 10 and the lower die 20 are closed, the forming block 24 and the lower die cavity 21 enclose to form a lower die cavity, and the lower die cavity and the upper die cavity 11 enclose to form a forming die cavity. Molten aluminum is added through a pouring gate, the molten aluminum enters the liquid distribution cavity and then gradually flows into the forming die cavity, after a connecting rod casting in the forming die cavity is cooled and formed, the mounting plate 40 and the lower die 20 are driven to move downwards through the oil cylinder, and at the moment, the push plate 30 also moves downwards under the action of self gravity. During the downward movement of the lower die 20, the inclined rod 12 applies acting force to the forming block 24, so that the forming block 24 moves to the side away from the lower die groove 21, the lower die cavity is disassembled, and the lower die groove 21 and the connecting rod casting cannot form a sealed space. When the mounting plate 40 descends to a certain position, the push plate 30 moves to the lower limit position, the mounting plate 40 continues to drive the lower die 20 to descend, and at the moment, the ejector rod 31 on the push plate 30 extends into the lower die cavity to eject the connecting rod casting in the lower die cavity, so that the discharging is realized.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.

Claims (8)

1. Casting mould is used in connecting rod processing, its characterized in that: comprises an upper die, a lower die, a material ejecting mechanism and a power mechanism for driving the lower die to move up and down; the upper die is provided with an upper die liquid separating cavity and at least one upper die cavity communicated with the upper die liquid separating cavity, and the upper die is provided with a pouring channel communicated with the upper die liquid separating cavity; the lower die is provided with a lower die liquid distribution cavity and at least one lower die groove communicated with the lower die liquid distribution cavity, the lower die is slidably connected with a forming block opposite to the lower cavity, the forming block and the lower die groove can form a lower die cavity in a surrounding manner, and the upper die cavity and the lower die cavity form a forming die cavity of the connecting rod casting; the forming block is provided with an inclined hole inclined towards one side of the lower die cavity, the upper die is provided with an inclined rod capable of being inserted into the inclined hole, and the forming block and the lower die cavity are surrounded to form a lower die cavity under the action of the inclined rod during die assembly.

2. The casting mold for machining a connecting rod according to claim 1, wherein: the power mechanism comprises a rack, an oil cylinder arranged on the rack and a mounting plate fixed on a piston rod of the oil cylinder, the mounting plate is positioned below the lower die, and a transmission rod is connected between the mounting plate and the lower die.

3. The casting mold for machining a connecting rod according to claim 2, wherein: the ejection mechanism comprises a push plate and a plurality of ejector rods arranged on the push plate; the push plate is positioned above the mounting plate, and the upper part of the transmission rod penetrates through the mounting plate; the lower die is provided with a mandril hole communicated with the lower die cavity, and the mandril is connected to the mandril hole in a sliding way; a limit groove is formed on the rack, and a bulge connected in the limit groove in a sliding manner is arranged on the push plate; when the push plate is contacted with the mounting plate, the ejector rod is positioned at the bottom of the lower die cavity.

4. The casting mold for machining a connecting rod according to claim 3, wherein: a filter screen is arranged in the pouring channel.

5. The casting mold for connecting rod working according to any one of claims 1 to 4, wherein: the number of the lower die grooves is 4, 2 lower die grooves are respectively distributed on the left side and the right side of the lower die, and the lower die grooves on the left side and the right side are symmetrically arranged; the lower die liquid distribution cavity is positioned in the middle of the 4 lower die cavities; the equal sliding connection in left and right sides of lower mould has the shaping piece, and 2 lower die slot cooperations of a shaping piece and homonymy can enclose and close 2 die cavities down that form.

6. The casting mold for machining a connecting rod according to claim 5, wherein: the lower die is provided with a dovetail groove, and the forming block is provided with a slide block which is connected in the dovetail groove in a sliding way.

7. The casting mold for machining a connecting rod according to claim 5, wherein: a guide groove is formed in the upper die, and a guide rod which is connected in the guide groove in a sliding manner is arranged on the lower die.

8. The casting mold for machining a connecting rod according to claim 5, wherein: the lower die is provided with a shunting cone positioned in the liquid-separating cavity of the lower die.

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