CN214349450U

CN214349450U - A casting device for a hydraulic pump body

Info

Publication number: CN214349450U
Application number: CN202023086679.0U
Authority: CN
Inventors: 唐德秋; 张汝文; 宋玉秋; 孙玉龙
Original assignee: Rongcheng Hengjia Auto Parts Manufacturing Co ltd
Current assignee: Rongcheng Hengjia Auto Parts Manufacturing Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-10-08
Anticipated expiration: 2030-12-18

Abstract

The utility model relates to a casting field just discloses a casting device of the hydraulic pump body. The casting device of the pump body is practical, adopts sand shell molding, and has simple manufacturing process, simple and convenient operation, high production efficiency, high smoothness of the obtained casting and high dimensional accuracy; meanwhile, the riser is arranged above the casting, so that the feeding effect is good, the internal quality is high, the casting and the riser are integrated, two parts are formed in one mould, the utilization rate of molten iron is high, the using amount of molding materials is small, and the cost is saved.

Description

Casting device of hydraulic pump body

Technical Field

The utility model relates to a casting technical field specifically is a casting device of hydraulic pump body.

Background

With the progress and development of scientific technology, the requirements on the quality of castings are higher and higher, the requirements on the appearance and the internal quality are higher and higher, the appearance quality of some castings with complex shapes is difficult to guarantee by using a common casting method, the production efficiency is low, the cost is high by using a precision casting method, and in order to solve the problems, the precoated sand process is carried out, and some manufacturers using the precoated sand process exist in the current market, and the traditional casting process method is not broken through by using the outer sand burying of the precoated sand shell mold. The hydraulic pump body is a pressure-resistant piece, the shape is complex, the wall thickness difference is large, the defects of shrinkage porosity, air holes and slag inclusion exist due to the fact that the internal quality of the existing hydraulic pump body is not too high, the defects of oil leakage and oil leakage exist generally, the failure rate is high, the cost is high, and the practicability is poor.

Disclosure of Invention

Not enough to prior art, the utility model provides a casting device of the hydraulic pump body possesses advantages such as the practicality is strong, has solved the hydraulic pump body production efficiency low, and inherent defect is many, technical problem with high costs.

In order to solve the technical problem, the utility model comprises a device body, wherein the device body comprises two shells to form the appearance of the device body, the device body comprises two inner sand cores to form the interior of the device body, a riser is arranged on the device body, and a pouring gate is arranged on the riser;

the device is characterized in that outer sand shell exhaust holes are formed in the first surface and the second surface of the device body, a positioning groove and a boss are formed in the shell, inner sand core exhaust holes are formed in the inner sand core, and a part enclosed between the shell and the inner sand core is a casting.

Preferably, the housings are provided in two and symmetrically arranged along a diagonal.

Preferably, the two shells which are symmetrical along the diagonal are provided with a positioning groove and a boss, and the positioning groove and the boss are tightly pressed together by the sealant to form a closed cavity.

Preferably, the two shells are provided with outer sand shell vent holes, and the number of the vent holes is four.

Preferably, the two shells are provided with a riser, the slot ingate of which is connected to the two castings.

Preferably, the inner sand cores are two groups of combination, and the sand cores are provided with hollow inner sand core exhaust holes.

Preferably, the gate is located above the riser, and the gate and the riser are integrally provided.

Compared with the prior art, the utility model provides a casting device of the hydraulic pump body possesses following beneficial effect:

1. this casting device of hydraulic pump body, two shells are equipped with symmetrical positioning groove and boss along the diagonal, closely fuses positioning groove and boss through sealed glue, forms inclosed outer cavity. Compact structure, the intensity of sand shell, rigidity are high, have replaced traditional sand shell and need bury the casting method of sand outward, have reduced a process, easy operation, production efficiency is high.

2. This casting device of the hydraulic pump body, two interior psammitolites are the combination core, have draw-in groove and locating frame, easy operation mutually supports through outer sand shell and interior psammitolite, can reach, and the location is accurate, and size and shape are the purpose that the tolerance precision is high, have improved the practicality of the casting device of the pump body.

3. The casting device of the pump body of the hydraulic pump effectively eliminates gas in the cavity through the exhaust hole of the sand shell and the exhaust hole of the inner sand core, reduces the formation of air holes and inclusions, and improves the internal quality of the pump body. Through the gap ingate, the filling is stable, the generation of slag and gas in the pouring process is reduced, the internal quality of the pump body is improved, and the service life of the pump body is prolonged.

4. According to the casting device of the hydraulic pump body, the sprue is arranged above the riser, the riser is arranged above the pump body, the feeding channel from top to bottom is realized by positive temperature gradient, shrinkage porosity and shrinkage cavity are avoided, and the leakage rate of the pump body is reduced. The safety and the reliability of the pump body are improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of the housing of the present invention;

FIG. 3 is a schematic view of the structure of the combined internal sand core of the present invention;

fig. 4 is a sectional view of the present invention;

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

The symbols in the figures indicate:

1. a device body; 2. an inner sand core; 3. an outer sand shell; 4. a riser; 5. a gate; 6. a pump body; 7. an inner sand core exhaust hole; 8. an outer sand shell vent hole; 9. positioning groove and boss.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Please refer to fig. 1-5, the utility model provides a casting device of hydraulic pump body, including device body 1, device body 1 comprises the appearance of device body by two outer sand shells 3, psammitolite 2 is through the location in two combinations, the core head card is in the position at two outer sand shells 3 places, the location is accurate, and is stable, firm reliable, the cavity that psammitolite 2 enclosed in two outer sand shells 3 and two combinations is exactly the pump body 6, be equipped with a rising head 4 on two outer sand shells 3, two pump body spare of riser pipe, the sectional area of interior watering is invariable, the pouring technology is stable, the steady quality. During operation, the first combined inner sand core 2 is flatly placed in one outer sand shell 2, the second combined inner sand core is glued on the positioning grooves of the two outer sand shells, the other half of the outer sand shells are buckled, and the sprue 5 is stuck on the riser 4.

Two outer sand shells 3 symmetrical along the diagonal line form the appearance of the device body, the thickness of the sand shell is uniform, no deformation is generated, the outer sand shell is provided with symmetrical positioning grooves and bosses 9 along the diagonal line, when the shell is assembled, sealant is coated in the positioning grooves, the two half outer sand shells are tightly attached together to form a closed cavity, and meanwhile, the appearance of the sand shell is provided with uniform reinforcing ribs, the pressure of molten iron can be borne, molten iron does not run out, and a box does not expand. The outer sand shell is provided with an outer sand shell exhaust hole 8, the outer sand shell exhaust hole 8 has the function of positioning the inner sand core, each core head is provided with one exhaust hole, and the total number of the four exhaust holes is four, so that gas in the cavity can be effectively discharged, when molten iron is poured into the cavity, gas generated by the combustion of molding materials is reduced, the formation of air holes and oxide inclusions is reduced, and the inherent quality of the pump body is improved.

The two combined inner sand cores 2 are empty, and four inner sand core exhaust holes 7 are formed in total, so that the using amount of sand is reduced, and the exhaust effect is achieved. The inner sand core is vertically arranged, so that the gas in the inner sand shell and the gas in the outer sand shell can be favorably surrounded, the exhaust is smooth, the generation of invasive gas is avoided, the formation of air holes and oxide inclusions is avoided, and the internal quality of the pump body is improved. The four positioning frames of the inner sand core are combined, symmetrically distributed, connected with the 8 positioning bolt holes of the pump body, clamped on the inner sand core and simultaneously clamped at the positioning position of the outer sand shell, so that the operation is simple and convenient, the positioning is accurate, and the dimensional tolerance and the form and position tolerance of the pump body are ensured. Completely meets the requirement of precision casting.

The riser 4 is directly arranged on the two outer sand shells 3, one outer sand shell 3 is provided with a half riser, the other outer sand shell 3 is provided with the other half riser, and the two outer sand shells 3 are combined to form the riser 4. A riser 4 is provided for the two pump elements 6. The riser is pressed on the pump body part 6 through the gap ingate, and on one hand, the gap ingate enables molten iron poured into the pump body to flow along the wall, so that the filling is stable, slag entrapment and gas entrapment are avoided, and harmful defects such as air holes and slag inclusion are reduced. On the other hand, the heat of the molten iron is dispersed, and the influence of local overheating on the performance of the pump body is avoided. The riser 4 presses on the pump body 6, so that the molten iron poured into the cavity establishes a positive temperature gradient, the temperature of the molten iron poured firstly is low, the temperature of the molten iron poured later is high, the molten iron poured firstly is firstly solidified to form a feeding channel from top to bottom, a good feeding effect is achieved on the pump body 6 with uneven wall thickness, shrinkage cavities and shrinkage porosity are avoided, the obtained pump body 6 is compact, the problems of oil leakage and oil leakage of the pump body 6 are solved, the failure rate is reduced, and the safety and the reliability of the pump body 6 are improved.

The pouring gate 5 is directly pressed on the riser 4, after molten iron is poured, the riser 4 is always in a hot state, the feeding effect is good, the molten iron is saved by the integration of the pouring gate and the riser, the utilization rate of the molten iron is high, the utilization rate of the molten iron is improved from 70-75% of the traditional molten iron to 85-90% of the traditional molten iron, the energy is saved, and the cost is saved. The sprue 5 and the riser 4 are integrally arranged to realize a feeding channel from top to bottom.

To sum up, the utility model provides a casting device of the hydraulic pump body possesses advantages such as the practicality is strong, has solved hydraulic pump body production efficiency low, and inherent defect is many, problem with high costs.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a casting device of hydraulic pump body, includes device body (1), its characterized in that: the device body (1) is formed by two shells (3) to form the appearance of the device body (1), the device body (1) is formed by two inner sand cores (2) to form the interior of the device body (1), a dead head (4) is arranged on the device body (1), and a pouring gate (5) is arranged on the dead head;

the sand core device is characterized in that outer sand shell exhaust holes (8) are formed in the first surface and the second surface of the device body (1), a positioning groove and a boss (9) are formed in the shell (3), inner sand core exhaust holes (7) are formed in the inner sand core, and a part enclosed between the shell (3) and the inner sand core (2) is a casting (6).

2. The casting device for a hydraulic pump body according to claim 1, characterized in that: the two shells (3) are symmetrically arranged along the diagonal.

3. The casting device for a hydraulic pump body according to claim 2, characterized in that: two shells (3) which are symmetrical along the opposite angle are provided with a positioning groove and a lug boss (9), and the positioning groove and the lug boss (9) are tightly pressed together by sealant to form a closed cavity.

4. The casting device for a hydraulic pump body according to claim 2, characterized in that: two the shell (3) is equipped with outer sand shell exhaust hole (8), and the quantity in exhaust hole is four.

5. The casting device for a hydraulic pump body according to claim 2, characterized in that: two the shell (3) is provided with a riser (4), and a slit ingate of the riser (4) is connected to the two castings (6).

6. The casting device for a hydraulic pump body according to claim 1, characterized in that: the inner sand cores (2) are two groups of combination, and the sand cores are provided with hollow inner sand core exhaust holes (7).

7. The casting device for a hydraulic pump body according to claim 1, characterized in that: and the pouring gate (5) is arranged above the riser (4), and the pouring gate and the riser are integrally arranged.