CN111408696A

CN111408696A - Sand mold device for nodular cast iron hub

Info

Publication number: CN111408696A
Application number: CN202010350179.9A
Authority: CN
Inventors: 黄远霞
Original assignee: Hanshan County Zhaoxia Casting Co ltd
Current assignee: Hanshan County Zhaoxia Casting Co ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-07-14

Abstract

The invention relates to the technical field of sand casting, in particular to a sand molding device of a nodular cast iron wheel hub, which comprises a base and a mounting frame fixedly connected with the base, wherein the top of the base is fixedly connected with a lower sand box, an upper sand box is arranged above the lower sand box, two ejection mechanisms which are symmetrically distributed are arranged inside the lower sand box and the base, one side of the base is provided with a limiting mechanism matched with the ejection mechanisms, and one side of the upper sand box is provided with a guide positioning mechanism inserted with the limiting mechanism; the limiting mechanism is used for limiting the ejection mechanism, the guiding and positioning mechanism is used for guiding and positioning when the lower sand box and the upper sand box are assembled, the assembly is conveniently and smoothly performed, and after the sand mold is processed, the guiding and positioning mechanism can relieve the limiting of the limiting mechanism on the ejection mechanism, so that the guiding and positioning mechanism can drive the hub to be ejected out of the lower sand box while relieving the guiding and positioning effect, and the hub processed by the sand mold can be conveniently taken out for subsequent processing.

Description

Sand mold device for nodular cast iron hub

Technical Field

The invention relates to the technical field of sand casting, in particular to a sand molding device for a nodular cast iron hub.

Background

The nodular cast iron is a high-strength cast iron material, the comprehensive performance of the nodular cast iron is close to that of steel, and the nodular cast iron is successfully used for casting parts which are complex in stress and high in requirements on strength, toughness and wear resistance based on the excellent performance of the nodular cast iron.

The sand casting is widely applied to the molding and manufacturing of various iron castings, and mainly comprises a sand box and a vertical sprue with a casting opening, wherein a casting cavity is arranged in the sand box. The basic flow of the traditional sand mold casting process comprises the following steps: the method comprises the steps of sand preparation, mold making, core making, modeling, pouring, sand shakeout, polishing processing, inspection and the like.

The sand casting is carried out on the nodular cast iron wheel hub, the quality of the wheel hub directly influences the driving safety, the wheel hub bears complex alternating load due to the fact that the wheel hub is located in a special position during driving, the service condition is poor, when the existing wheel hub is used for sand mold treatment, firstly, a cope flask and a drag flask are molded and core-making is completed, casting molding is carried out in the sand flask through mold closing, a wheel hub workpiece is taken out after molding, and due to the fact that the mold and the core-making are in a certain shape inside the sand flask, the mold and the core-making are required to be subjected to shakeout treatment when the workpiece is taken out, the workpiece can be taken out, and the workpiece is taken out in a mode which is troublesome and inconvenient.

Disclosure of Invention

Technical problem to be solved

The invention aims to overcome the defects in the prior art and provides a sand molding device for a nodular cast iron hub.

(II) technical scheme

The utility model provides a nodular cast iron wheel hub's sand mould device, includes the base and with base fixed connection's mounting bracket, the top fixedly connected with drag flask of base, the top of drag flask is provided with the cope flask, the inside of drag flask and base is provided with two ejection mechanism that are symmetric distribution, one side of base is provided with the stop gear with ejection mechanism matched with, one side of cope flask is provided with the guiding orientation mechanism who pegs graft with stop gear.

Preferably, the ejection mechanism comprises an ejector rod in sliding connection with the drag box, a fixed block is fixedly connected to the outer side of the ejector rod, an ejection spring is fixedly connected between the ejector rod and the drag box, two sliding blocks which are symmetrically distributed are slidably connected to the inner portion of the base, the bottoms of the two sliding blocks are fixedly connected through a U-shaped rod, one sliding block and the bottom of the ejector rod are inclined planes matched with each other, and an extrusion spring is fixedly connected between the sliding block and the inner wall of the base.

Preferably, stop gear include with base sliding connection's gag lever post, the gag lever post is the inclined plane of looks adaptation with the contact surface of keeping away from the sliding block of ejector pin, one side sliding connection of base have with the L templates of gag lever post top contact, the inside fixedly connected with dead lever of base, L template slip through dead lever.

Preferably, guiding orientation mechanism include with cope flask both sides fixed connection's fixed plate, be provided with the cylinder between fixed plate and the mounting bracket, the bottom fixedly connected with of fixed plate and the reference column of the inside looks adaptation of gag lever post, one side of reference column is provided with the locating piece of L template top looks adaptation, it has the connecting rod to articulate between locating piece and the reference column, the bottom fixedly connected with connecting plate of fixed connecting rod, fixedly connected with reset spring between connecting plate and the reference column.

Preferably, the top of the L template is "concave", and the size of the bottom of reference column is less than the width size of L template "concave" department.

Preferably, when the bottom surface of the L template contacts the top end of the stop rod, the compression spring is in a compressed state, and at the moment, the ejector rod is positioned in the inner part of the drag flask.

Preferably, when the cope flask and the drag flask are assembled, the positioning column is inserted into the limiting rod, at the moment, the positioning block is inserted into the L template, and the L template is separated from the top of the limiting rod.

(III) advantageous effects

The invention provides a sand mold device for a nodular cast iron hub, which has the following advantages:

1. the limiting mechanism is used for limiting the ejection mechanism, the guiding and positioning mechanism is used for guiding and positioning when the lower sand box and the upper sand box are matched, so that the matching is facilitated to be carried out smoothly, and after the sand mold treatment is completed, the guiding and positioning mechanism can relieve the limiting of the limiting mechanism on the ejection mechanism, so that the guiding and positioning mechanism can drive the hub to be ejected out of the lower sand box while relieving the guiding and positioning effect, and the hub subjected to the sand mold treatment can be taken out conveniently for subsequent treatment;

2. the limiting rod is limited by moving the L template, so that the limiting rod moves in the base, the sliding block compresses the extrusion spring under the action of the U-shaped rod, the ejector rod is matched with the fixing block under the action of the elastic force of the ejection spring, the sand mold treatment of the upper sand box and the lower sand box on the wheel hub is not influenced when the ejector rod is arranged in the lower sand box, the positioning column can limit the ejector rod while realizing the guiding and positioning effect when the lower sand box and the upper sand box are assembled, and the wheel hub workpiece can be better taken out by separating the positioning column from the limiting rod after the sand mold treatment of the wheel hub is finished.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only for the present invention and protect some embodiments, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic main sectional view of the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1;

FIG. 3 is an enlarged view of the area B in FIG. 1;

FIG. 4 is an enlarged schematic view of a top view of the spacing mechanism of the present invention;

fig. 5 is a schematic front view of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the automatic sand box comprises a base, 2, a mounting frame, 3, a drag flask, 4, a cope flask, 5, an ejection mechanism, 51, a push rod, 52, a fixed block, 53, an ejection spring, 54, a sliding block, 55, a U-shaped rod, 56, an extrusion spring, 6, a limiting mechanism, 61, a limiting rod, 62, L templates, 63, a fixed rod, 7, a guiding and positioning mechanism, 71, a fixed plate, 72, a cylinder, 73, a positioning column, 74, a positioning block, 75, a connecting rod, 76, a connecting plate, 77 and a return spring.

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. 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.

Referring to fig. 1-5, the sand molding device for a nodular cast iron hub provided by the invention comprises a base 1 and a mounting frame 2 fixedly connected with the base 1, wherein a drag flask 3 is fixedly connected with the top of the base 1, a cope flask 4 is arranged above the drag flask 3, two ejection mechanisms 5 which are symmetrically distributed are arranged inside the drag flask 3 and the base 1, a limiting mechanism 6 matched with the ejection mechanisms 5 is arranged on one side of the base 1, a guiding and positioning mechanism 7 inserted with the limiting mechanism 6 is arranged on one side of the cope flask 4, specifically, the cope flask 4 and the drag flask 3 are used for sand molding of the nodular cast iron hub, a pouring gate is arranged at the bottom of the cope flask 4, a pouring hopper is arranged above the pouring gate, the size of the pouring hopper is slightly smaller than that of the pouring gate, the nodular cast iron hub is processed by the matching of the cope flask 4 and the drag flask 3, the ejection mechanism 5 is used for ejecting the poured nodular cast iron wheel hub, the wheel hub can be conveniently taken out, the limiting mechanism 6 is used for limiting the ejection mechanism 5, the guiding and positioning mechanism 7 is used for guiding and positioning the lower sand box 3 and the upper sand box 4 during die assembly, the die assembly can be conveniently and smoothly carried out, after the sand mold treatment is completed, the guiding and positioning mechanism 7 can relieve the limiting of the ejection mechanism 5 by the limiting mechanism 6, the guiding and positioning mechanism 7 can drive the wheel hub to be ejected out of the lower sand box 3 while relieving the guiding and positioning effect, and the wheel hub subjected to the sand mold treatment can be conveniently taken out for subsequent treatment.

Further, the ejection mechanism 5 comprises an ejector rod 51 slidably connected with the drag flask 3, a fixed block 52 is fixedly connected to the outer side of the ejector rod 51, an ejection spring 53 is fixedly connected between the fixed block 52 and the drag flask 3 of the ejector rod 51, two sliding blocks 54 symmetrically distributed are slidably connected to the inner part of the base 1, the bottoms of the two sliding blocks 54 are fixedly connected through a U-shaped rod 55, one of the sliding blocks 54 and the bottom of the ejector rod 51 are inclined surfaces matched with each other, an extrusion spring 56 is fixedly connected between the sliding block 54 and the inner wall of the base 1, and in an initial state, the sliding block 54 extrudes the ejector rod 51 under the elastic action of the extrusion spring 56, so that the top end of the ejector rod 51 extends into the drag flask 3; when the drag flask 3 is subjected to molding treatment and the like, and the other slide block 54 is extruded by the limiting mechanism 6, the slide block 54 compresses the extrusion spring 56 by the action of the U-shaped rod 55, and the ejector rod 51 is arranged in the drag flask 3 by the elastic force of the ejector spring 53 and the fixed block 52, so that the sand mold treatment of the cope flask 4 and the drag flask 3 on the hub is not influenced.

Further, stop gear 6 includes gag lever post 61 with base 1 sliding connection, gag lever post 61 is the inclined plane of looks adaptation with the contact surface of the sliding block 54 of keeping away from ejector pin 51, one side sliding connection of base 1 has L template 62 with gag lever post 61 top contact, the inside fixedly connected with dead lever 63 of base 1, L template 62 slides and runs through dead lever 63, it is specific, realize the contact extrusion to sliding block 54 through gag lever post 61, thereby make ejector pin 51 be located the inside of drag box 3, L template 62 is used for spacing gag lever post 61, prevent that ejector pin 51 from extending out when the compound die, dead lever 63 is used for removing L template 62, improve L template 62 stability of motion, thereby be convenient for carry on spacing and contact spacing to gag lever post 61.

Further, the guiding and positioning mechanism 7 includes a fixing plate 71 fixedly connected to two sides of the cope flask 4, an air cylinder 72 is disposed between the fixing plate 71 and the mounting frame 2, a positioning column 73 is fixedly connected to the bottom of the fixing plate 71 and is adapted to the inside of the limiting rod 61, a positioning block 74 is disposed on one side of the positioning column 73 and is adapted to the top of the L mold plate 62, a connecting rod 75 is hinged between the positioning block 74 and the positioning column 73, a connecting plate 76 is fixedly connected to the bottom of the determined connecting rod 75, a return spring 77 is fixedly connected between the connecting plate 76 and the positioning column 73, specifically, when the cope flask 4 and the drag flask 3 are clamped by the two air cylinders 72, the positioning mechanism 6 limits the ejector mechanism 5, the ejector rod 51 is located inside the drag flask 3, the positioning column 73 is inserted into the limiting rod 61 from the mold plate 62, at this time, the positioning block 74 on one side of the positioning column 73 is inserted into the top of the mold plate 62, when the positioning column 73 moves towards the inside of the limiting rod 61 to the completion of the mold clamping, at this time, the positioning column 74 compresses the L, the positioning column 57 moves towards the outside of the limiting rod 61, the positioning column 62, L is in a state, the positioning column 73, the positioning column drives the positioning column to push out the hub of the work piece 71 through the positioning column 73, and is convenient for the extrusion of the hub of.

The specific application of the scheme is that before the cope flask 3 and the drag flask 4 are clamped, the limiting rod 61 is limited by moving L the template 62, so that the limiting rod 61 moves in the base 1, the sliding block 54 compresses the extrusion spring 56 through the action of the U-shaped rod 55, at the moment, the ejector rod 51 is matched with the fixed block 52 through the elastic force of the ejection spring 53, so that the sand mold treatment of the wheel hub by the cope flask 4 and the drag flask 3 is not influenced, when the cope flask 4 and the drag flask 3 drive the positioning column 73 and the limiting rod 61 to carry out plug-in mould clamping through the air cylinder 72, when the positioning column 73 moves towards the inside of the limiting rod 61 to complete mould clamping, the positioning block 74 compresses L the template 62 at the moment, so that the L template 62 moves towards the outer side, the L template 62 is separated from the limiting rod 61, at the moment, the limiting rod 61 is limited through the positioning column 73, after the mould clamping and the casting is completed, the air cylinder 72 drives the fixing plate 71 to ascend, so that the positioning column 73 is separated from the limiting rod 61, at the workpiece wheel hub in the drag flask 3 is conveniently taken out through the elastic force of the ejector rod 51.

Furthermore, the top of the L-shaped plate 62 is concave, the bottom end of the positioning column 73 is smaller than the width of the concave part of the L-shaped plate 62, specifically, the positioning column 73 can be moved to limit the position of the limiting rod 61 through the L-shaped plate 62 before mold closing is finished, the ejector rod 51 is prevented from extending into the lower sand box 3, and the positioning column 73 is arranged in size, so that when guiding and positioning are performed in the mold closing process, the positioning column 73 can achieve guiding and positioning effects and can limit the position of the limiting rod 61.

Further, when the bottom surface of the L template 62 contacts the top end of the limit rod 61, the extrusion spring 56 is in a compressed state, and at this time, the ejector rod 51 is located inside the drag flask 3, and specifically, when it is ensured that the L template 62 limits the limit rod 61, the ejector rod 51 is located inside the drag flask 3 by the elastic force of the ejection spring 53, so that the influence on the processing of the hub workpiece sand mold when the drag flask 3 and the cope flask 4 are clamped can be effectively prevented.

Furthermore, when the cope flask 4 and the drag flask 3 are matched, the positioning column 73 is inserted into the limiting rod 61, the positioning block 74 is inserted into the L-shaped plate 62, the L-shaped plate 62 is separated from the top of the limiting rod 61, and particularly, when the drag flask 3 and the cope flask 4 are matched, the positioning column 73 can perform a guiding and positioning function and can limit the ejector rod 51, and after the hub sand mold treatment is completed, the hub workpiece can be better taken out through the separation of the positioning column 73 and the limiting rod 61.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a nodular cast iron wheel hub's sand mould device, includes base (1) and with base (1) fixed connection's mounting bracket (2), the top fixedly connected with drag flask (3) of base (1), the top of drag flask (3) is provided with cope flask (4), its characterized in that: the sand box comprises a lower sand box (3), a base (1) and two ejection mechanisms (5) which are symmetrically distributed, wherein a limiting mechanism (6) matched with the ejection mechanisms (5) is arranged on one side of the base (1), and a guide positioning mechanism (7) inserted with the limiting mechanism (6) is arranged on one side of an upper sand box (4).

2. The sand molding device for the nodular cast iron hub according to claim 1, wherein: the ejection mechanism (5) comprises an ejector rod (51) which is in sliding connection with the drag box (3), a fixed block (52) is fixedly connected to the outer side of the ejector rod (51), an ejection spring (53) is fixedly connected between the fixed block (52) and the drag box (3) and is positioned on the ejector rod (51), two sliding blocks (54) which are symmetrically distributed are in sliding connection with the inner part of the base (1), the bottoms of the two sliding blocks (54) are fixedly connected through a U-shaped rod (55), one of the sliding blocks (54) and the bottom of the ejector rod (51) is an adaptive inclined plane, and an extrusion spring (56) is fixedly connected between the sliding block (54) and the inner wall of the base (1).

3. The ductile iron hub sand molding device according to claim 1, wherein the limiting mechanism (6) comprises a limiting rod (61) in sliding connection with the base (1), the contact surface of the limiting rod (61) and the sliding block (54) far away from the top rod (51) is an adaptive inclined surface, one side of the base (1) is in sliding connection with an L-shaped plate (62) in contact with the top of the limiting rod (61), a fixing rod (63) is fixedly connected to the inside of the base (1), and the L-shaped plate (62) penetrates through the fixing rod (63) in a sliding manner.

4. The sand molding device for the nodular cast iron wheel hub according to claim 1, wherein the guiding and positioning mechanism (7) comprises a fixing plate (71) fixedly connected with two sides of the cope flask (4), an air cylinder (72) is arranged between the fixing plate (71) and the mounting frame (2), the bottom of the fixing plate (71) is fixedly connected with a positioning column (73) matched with the inside of the limiting rod (61), one side of the positioning column (73) is provided with L positioning blocks (74) matched with the tops of the shaping plates (62), a connecting rod (75) is hinged between the positioning blocks (74) and the positioning column (73), the bottom of the connecting rod (75) is fixedly connected with a connecting plate (76), and a return spring (77) is fixedly connected between the connecting plate (76) and the positioning column (73).

5. The sand molding device for the nodular cast iron hub according to the claim 3, wherein the top of the L template (62) is concave, and the bottom of the positioning column (73) is smaller than the width of the L template (62).

6. A sand molding apparatus for a nodular cast iron hub according to claim 5, wherein when the bottom surface of said L pattern plate (62) contacts the top end of said limiting rod (61), said squeeze spring (56) is in a compressed state, and at this time, said top rod (51) is located inside said drag flask (3).

7. The ductile iron hub sand molding device according to claim 1, wherein when the cope flask (4) and the drag flask (3) are closed, the positioning column (73) is inserted into the inside of the limiting rod (61), the positioning block (74) is inserted into the L-shaped plate (62), and the L-shaped plate (62) is separated from the top of the limiting rod (61).