CN215657682U - Molding sand box of lower rocker arm - Google Patents
Molding sand box of lower rocker arm Download PDFInfo
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- CN215657682U CN215657682U CN202122258154.9U CN202122258154U CN215657682U CN 215657682 U CN215657682 U CN 215657682U CN 202122258154 U CN202122258154 U CN 202122258154U CN 215657682 U CN215657682 U CN 215657682U
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- rocker arm
- lower rocker
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Abstract
The utility model provides a molding sand box of a lower rocker arm, comprising: an upper box, wherein molding sand is arranged in the upper box, and an upper groove is formed by the molding sand; the lower box is internally provided with molding sand, and a lower groove corresponding to the upper groove is formed through the molding sand so that the upper groove and the lower groove form a cavity corresponding to the lower rocker arm; the first sand core is arranged in the cavity and corresponds to one end of the lower rocker arm so as to form a first shaft fork through casting; the second sand core is arranged in the cavity and corresponds to the other end of the lower rocker arm so as to form a second shaft fork through casting; the third sand core is arranged in the cavity and corresponds to the middle part of the lower rocker arm so as to form a main body of the lower rocker arm through pouring; the lower rocker arm is molded through the sand core, so that the problems of product deformation, uneven wall thickness and unqualified flaw detection can be effectively solved, the workload of defect repair welding of a finishing process is reduced to a great extent, the production cost is effectively saved, and the delivery construction period is shortened.
Description
Technical Field
The utility model belongs to the technical field of casting technology, and particularly relates to a molding sand box of a lower rocker arm.
Background
The lower rocker arm is an important part of vertical mill equipment, the R angle and the processing surface require ultrasonic flaw detection according to the JB/T5000.14 grade 2, and due to the casting structure, the modeling is difficult (low efficiency), the problems of uneven wall thickness of a product, unqualified flaw detection and the like are easily caused.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a reasonable sand box which can meet the technical quality requirements of the product.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a lower swing arm molding flask, the flask comprising:
the upper box is internally provided with molding sand, and an upper groove is formed through the molding sand;
the lower box is internally provided with molding sand, a lower groove corresponding to the upper groove is formed through the molding sand, and the upper box is correspondingly buckled above the lower box so that the upper groove and the lower groove form a cavity corresponding to the lower rocker arm;
the first sand core is arranged in the cavity and corresponds to one end of the lower rocker arm so as to form a first shaft fork through casting;
the second sand core is arranged in the cavity and corresponds to the other end of the lower rocker arm so as to form a second shaft fork through casting;
the third sand core is arranged in the cavity and corresponds to the middle of the lower rocker arm, so that the main body of the lower rocker arm is formed by casting;
and the pouring gate is arranged on the upper box and used for pouring molten steel into the cavity.
Preferably, support columns are arranged on two sides of the first sand core, the second sand core and the third sand core and are inserted into corresponding molding sand, so that shaft holes are formed in the first shaft fork, the second shaft fork and the main body of the lower rocker arm through pouring.
Preferably, the sand box further comprises:
the first chilling block is arranged on the inner wall of the position, corresponding to the shaft hole, of the first shaft fork;
and the second chilling block is arranged on the outer wall of the position, corresponding to the shaft hole, of the second shaft fork.
Preferably, the number of the gates is two, and the two gates are respectively positioned at two sides of the main body of the lower rocker arm;
three risers corresponding to the lower rocker arm are further distributed on the upper type groove, and one of the three risers is positioned at the connecting position of the lower rocker arm main body and the second shaft fork; the other two of the three risers are located on two tines of the first fork, respectively.
Preferably, the parting line of the upper box and the lower box is positioned on the upper edge of the integral shape of the lower rocker arm;
or the parting line of the upper box and the lower box is positioned at the central line of the integral shape of the lower rocker arm.
Preferably, exhaust passages are arranged on both sides of the cavity.
Preferably, three exhaust points are arranged on each side of the cavity, the three exhaust points are respectively located at the first shaft fork, the second shaft fork and the main body, and the three exhaust points are communicated with the exhaust passage so as to exhaust in the pouring process.
Preferably, the exhaust points on both sides of the cavity are located on the same horizontal plane.
Preferably, the third sand core has a triangular prism-like structure so that a groove-like body is formed in the lower rocker arm main body by casting.
Preferably, the cavity is provided with a communicating groove corresponding to one end of the first shaft fork, and two ends of the communicating groove are correspondingly communicated with two sides of the first shaft fork so as to form reinforcing ribs connecting two sides of the first shaft fork through pouring.
Has the advantages that: the lower rocker arm is molded through the sand core, so that the problems of product deformation, uneven wall thickness and unqualified flaw detection can be effectively solved, the workload of defect repair welding of a finishing process is reduced to a great extent, the production cost is effectively saved, and the delivery construction period is shortened.
In addition, a parting line of the upper box and the lower box is arranged on the upper edge of the integral shape of the lower rocker arm or the central line of the integral shape of the lower rocker arm; the surface area of the upper box of the product is reduced, and the effect of reducing the sand and air hole defects on the surface of the upper box is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. Wherein:
FIG. 1 is a schematic illustration of a parting line at the centerline of the overall shape of the lower rocker arm in an embodiment of the present invention;
FIG. 2 is a schematic view of a parting line located along an upper edge of the overall shape of the lower rocker arm in an embodiment of the present invention;
FIG. 3 is a diagrammatic cross-sectional view of FIG. 2;
FIG. 4 is a schematic illustration of the cast lower rocker arm of the embodiment of the present invention;
FIG. 5 is a schematic top view of a lower rocker arm after being cast into shape in accordance with an embodiment of the present invention.
In the figure: 1. a lower rocker arm; 2. discharging the box; 3. feeding the box; 4. a first sand core; 5. a third sand core; 6. a second sand core; 7. parting lines; 8. a riser; 9. a gate; 10. an exhaust passage; 11. a shaft hole; 12. performing cold iron; 13. reinforcing ribs; 14. a second chill; 1.1, a first shaft fork, 1.2 and a second shaft fork; 1.3, main body.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
1-5, a lower swing arm molding flask, the flask comprising: an upper box 3, wherein molding sand is arranged in the upper box 3, and an upper groove is formed through the molding sand; the lower box 2 is internally provided with molding sand, a lower groove corresponding to the upper groove is formed through the molding sand, and the upper box 3 is correspondingly buckled above the lower box 2 so as to form a cavity corresponding to the lower rocker arm 1; the first sand core 4 is arranged in the cavity and corresponds to one end of the lower rocker arm 1, so that a first shaft fork 1.1 is formed by casting; the second sand core 6 is arranged in the cavity and corresponds to the other end of the lower rocker arm 1, so that a second shaft fork 1.2 is formed through casting; the third sand core 5 is arranged in the cavity and corresponds to the middle of the lower rocker arm 1, so that a main body 1.3 of the lower rocker arm 1 is formed by casting; the pouring gate 9 is arranged on the upper box 3, and is used for pouring molten steel into the cavity; the first shaft fork 1.1, the second shaft fork 1.2 and the main body 1.3 of the lower rocker arm 1 are formed by the first sand core 4, the second sand core 6 and the third sand core 5 respectively, and the lower rocker arm 1 is molded by the sand cores, so that the problems of product deformation, uneven wall thickness and unqualified flaw detection can be effectively solved.
In another optional embodiment of the present application, support columns are disposed on two sides of the first sand core 4, the second sand core 6 and the third sand core 5, and are inserted into the corresponding molding sand, and the outer diameters of the support columns can be prefabricated according to the inner diameter of the actually required formed shaft hole, so that the shaft holes 11 are formed at the first shaft fork 1.1, the second shaft fork 1.2 and the main body 1.3 of the lower rocker arm 1 through pouring. The first shaft fork 1.1 and the second shaft fork 1.2 are used for connecting a hinge shaft and are connected with a driving device and the vertical mill through the hinge shaft.
Correspondingly, the sand box still includes: the first chilling block 12 is arranged on the inner wall of the position, corresponding to the shaft hole 11, of the first shaft fork 1.1, and the chilling block at the position is annular and is concentrically arranged with the shaft hole at the position; and the second chilling block 14, the second chilling block 14 is arranged at the outer wall of the position of the second shaft fork 1.2 corresponding to the shaft hole 11, and the second chilling block 14 is matched with the second shaft fork in shape and is provided with a through hole corresponding to the shaft hole at the second shaft fork. In the chill casting production, the chill can accelerate the cooling speed of the iron casting in the pouring process, control shrinkage and obtain directional solidification so as to ensure the casting quality.
In another alternative embodiment of the present application, a plurality of risers 8 corresponding to the lower rocker arm 1 are further distributed on the upper profiled groove. Two gates 9 are arranged, and the two gates 9 are respectively positioned at two sides of the main body 1.3 of the lower rocker arm 1; three risers 8 are provided, and one of the three risers 8 is positioned at the joint of the main body 1.3 of the lower rocker arm 1 and the second shaft fork 1.2; the other two of the three risers 8 are located on the two prongs of the first shaft fork 1.1. Feeding is carried out on the lower rocker arm 1 in the forming process through a plurality of risers 8 so as to ensure the quality of the cast workpiece.
In another alternative embodiment of the present application, the parting line 7 of the upper and lower cases 3, 2 is located at the upper edge of the lower rocker arm integral molding; alternatively, the parting line 7 of the upper and lower cases 3 and 2 is located at the centerline of the lower rocker arm overall molding. The overall shape of the lower rocker arm is the outline shape of the lower rocker arm in an orthographic projection view, and is specifically shown in fig. 1 or fig. 2; parting line 7 is located lower rocking arm overall modeling's central line or above the midline to this area that reduces upper groove inner wall has played the effect that reduces 3 face sand gas pocket defects on the upper box.
In an alternative embodiment of the application, venting channels 10 are provided on both sides of the mould cavity. Three exhaust points are arranged on each side of the cavity, the three exhaust points are respectively located at the first shaft fork 1.1, the second shaft fork 1.2 and the main body 1.3, and the three exhaust points are communicated with an exhaust passage 10 to exhaust in the casting process. All set up a plurality of exhaust points in the both sides of rocker arm 1 down, can discharge unnecessary gas rapidly, reduce the problem that the defective rate is high of detecting a flaw, the exhaust gas passes through the exhaust passage and discharges, and the exhaust passage extends to the upper surface of last case.
In this embodiment, the exhaust points located on the two sides of the cavity are located on the same horizontal plane, and the exhaust points are located on the lower-section groove, so that the excess gas is exhausted in the initial pouring stage, and the reject ratio is reduced.
In another alternative embodiment of the present application, the third sand core 5 is of a triangular prism-like configuration, such that the lower rocker arm 1 body 1.3 is formed into a trough-like body by casting. Make main part 1.3 middle part form class triangular prism form cell body through third psammitolite 5, reduced main part 1.3's weight, make main part 1.3 have higher intensity through class triangular prism column structure simultaneously, class triangular prism is the column or the platellite that overall profile is similar with the triangular prism.
In addition, the third sand core may be any one of a hexagonal prism, an octagonal prism, a cylinder, and a quadrangular prism, and of course, the third sand core may have other shapes, and the specific shape is selected according to the shape and size of the body 1.3 to be molded.
In this embodiment, any two adjacent surfaces of the third sand core 5 are transited through the arc transition surface, so that stress concentration is avoided, and the molding quality of the main body 1.3 is improved.
In another alternative embodiment of the present application, the sand core is composed of casting sand, molding sand and a binder, and after the casting is completed, the sand core is broken and taken out.
In this embodiment, the cavity is provided with a communicating groove corresponding to one end of the first shaft fork 1.1, and two ends of the communicating groove are correspondingly communicated with two sides of the first shaft fork 1.1, so as to form the reinforcing rib 13 connecting two sides of the first shaft fork 1.1 through pouring. The lower rocker arm 1 is prevented from deforming in the cooling process, and the qualification rate of products is improved.
In summary, the application provides a molding sand box of a lower rocker arm, the lower rocker arm 1 is integrally molded by arranging a sand core, the problems of product deformation, uneven wall thickness and unqualified flaw detection can be effectively solved, and a parting line 7 of an upper box 3 and a lower box 2 is arranged on the upper edge of the integral molding of the lower rocker arm 1 or the central line of the integral molding of the lower rocker arm 1; the surface area of the upper box 3 of the product is reduced, and the effect of reducing the sand and air hole defects on the surface of the upper box 3 is achieved; production data show that the qualification rate of the lower rocker arm 1 produced by the improved sand box can be improved by 20-30%. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
The above description is only exemplary of the utility model and should not be taken as limiting the utility model, as any modification, equivalent replacement, or improvement made within the spirit and principle of the utility model is intended to be covered by the appended claims.
Claims (10)
1. A drag flask for a lower swing arm, the flask comprising:
the upper box is internally provided with molding sand, and an upper groove is formed through the molding sand;
the lower box is internally provided with molding sand, a lower groove corresponding to the upper groove is formed through the molding sand, and the upper box is correspondingly buckled above the lower box so that the upper groove and the lower groove form a cavity corresponding to the lower rocker arm;
the first sand core is arranged in the cavity and corresponds to one end of the lower rocker arm so as to form a first shaft fork through casting;
the second sand core is arranged in the cavity and corresponds to the other end of the lower rocker arm so as to form a second shaft fork through casting;
the third sand core is arranged in the cavity and corresponds to the middle of the lower rocker arm, so that the main body of the lower rocker arm is formed by casting;
and the pouring gate is arranged on the upper box and used for pouring molten steel into the cavity.
2. The lower swing arm molding flask according to claim 1, wherein support pillars are provided on both sides of said first core, said second core and said third core, and are inserted into corresponding molding sand, so that shaft holes are formed at said first yoke, said second yoke and said body of said lower swing arm by casting.
3. The lower swing arm molding flask according to claim 2, further comprising:
the first chilling block is arranged on the inner wall of the position, corresponding to the shaft hole, of the first shaft fork;
and the second chilling block is arranged on the outer wall of the position, corresponding to the shaft hole, of the second shaft fork.
4. The lower swing arm molding flask according to claim 3,
the two gates are respectively positioned at two sides of the main body of the lower rocker arm;
three risers corresponding to the lower rocker arm are further distributed on the upper type groove, and one of the three risers is positioned at the connecting position of the lower rocker arm main body and the second shaft fork; the other two of the three risers are located on two tines of the first fork, respectively.
5. The lower swing arm molding flask according to claim 1, wherein the parting line of said upper and lower boxes is located at the upper edge of the lower swing arm integral molding;
or the parting line of the upper box and the lower box is positioned at the central line of the integral shape of the lower rocker arm.
6. The lower swing arm molding flask according to claim 1, wherein an exhaust duct is provided on both sides of the cavity.
7. The lower rocker arm molding flask of claim 6, wherein three venting points are provided on each side of the mold cavity, at said first and second yokes and said body, respectively, and wherein said venting points are in communication with said vent passage for venting during casting.
8. The lower swing arm molding flask according to claim 7, wherein said venting points on both sides of the cavity are located on the same horizontal plane.
9. The lower rocker molding flask of claim 1, wherein the third sand core is of a triangular prism-like configuration to form a trough-like shape in the lower rocker body by casting.
10. The lower swing arm molding flask according to claim 1, wherein the cavity is provided with a communication groove at an end corresponding to the first yoke, and both ends of the communication groove are communicated with both sides of the first yoke, respectively, to form a reinforcing rib connecting both sides of the first yoke by casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122258154.9U CN215657682U (en) | 2021-09-17 | 2021-09-17 | Molding sand box of lower rocker arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122258154.9U CN215657682U (en) | 2021-09-17 | 2021-09-17 | Molding sand box of lower rocker arm |
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| Publication Number | Publication Date |
|---|---|
| CN215657682U true CN215657682U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122258154.9U Active CN215657682U (en) | 2021-09-17 | 2021-09-17 | Molding sand box of lower rocker arm |
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| CN (1) | CN215657682U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114570889A (en) * | 2022-02-24 | 2022-06-03 | 天地上海采掘装备科技有限公司 | Casting process of rocker arm shell of ultra-thick coal seam mining machine |
-
2021
- 2021-09-17 CN CN202122258154.9U patent/CN215657682U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114570889A (en) * | 2022-02-24 | 2022-06-03 | 天地上海采掘装备科技有限公司 | Casting process of rocker arm shell of ultra-thick coal seam mining machine |
| CN114570889B (en) * | 2022-02-24 | 2024-05-03 | 天地上海采掘装备科技有限公司 | Casting technology of rocker arm shell of super-thick coal seam coal mining machine |
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