A hydraulic pump cover casting system

Abstract

The present application relates to a kind of hydraulic pump cover pouring system, which uses sand core assembled by several sand cores;Sand core is three, one is main core, one is left sand core, one is right sand core;Main core constitutes the internal flow passage of hydraulic pump cover, including two main oil channels, four auxiliary oil channels, two main oil channels are placed in hydraulic pump cover side by side, four auxiliary oil channels are placed in hydraulic pump cover side by side, main oil channel and auxiliary oil channel are vertical, one main oil channel and two auxiliary oil channels meet in hydraulic pump cover, another main oil channel and another two auxiliary oil channels meet in hydraulic pump cover, two main oil channel end is connected by process core head;Left sand core, right sand core are plate core;The pouring system includes by straight gate, high narrow horizontal gate, flat gate, riser, sand mould is connected, sand mould is combined by sand core assembly and sand box;Right sand core is provided with inner gate, and the shape of inner gate is high right trapezoidal structure and is located above center line. Product meets product design tolerance requirement, and there is no internal defect.

Description

TECHNICAL FIELD

[0001] The present application relates to casting technology, in particular to a hydraulic pump cover sand core pouring process. BACKGROUND

[0002] Using traditional process means, the size precision of each oil outlet position of the cast hydraulic pump cover cannot be controlled, which does not meet the product design tolerance requirements, and internal casting defects are often left, with a high unqualified rate. SUMMARY

[0003] To solve the above problems, the present application provides a hydraulic pump cover pouring process.

[0004] The technical scheme of the present application is as follows:

[0005] A hydraulic pump cover sand core assembly is assembled by a plurality of sand cores; the sand core assembly includes three sand cores, one of which is a main core, one is a left sand core, and one is a right sand core;

[0006] The main core constitutes the internal flow channel of the hydraulic pump cover, including two main oil channels and four auxiliary oil channels, the two main oil channels are arranged side by side in the hydraulic pump cover, and their two ends are respectively connected to the oil ports arranged on the upper and lower surfaces of the hydraulic pump cover, the four auxiliary oil channels are arranged side by side in the hydraulic pump cover, and their two ends are respectively connected to the oil ports arranged on the left and right surfaces of the hydraulic pump cover, the main oil channels are perpendicular to the auxiliary oil channels, one main oil channel intersects with two auxiliary oil channels in the hydraulic pump cover, and the other main oil channel intersects with the other two auxiliary oil channels in the hydraulic pump cover, and the end portions of the two main oil channels are connected by a process core head;

[0007] The left sand core is a plate core, and four hole core head sockets are arranged on the left sand core, the left ends of the four auxiliary oil channels of the main core extend out of the hydraulic pump cover, and a left core head is arranged on each of the left ends, the four left core heads are embedded one by one into the four hole core head sockets on the left sand core, and the main core and the left sand core are connected;

[0008] The right sand core is also a plate core, and four hole core head sockets are arranged on the right sand core, the right ends of the four auxiliary oil channels of the main core extend out of the hydraulic pump cover, and a right core head is arranged on each of the right ends, the four right core heads are embedded one by one into the four hole core head sockets on the right sand core, and the main core and the right sand core are connected.

[0009] The middle part of the main oil channel is semilunar, and the two ends are columnar, the auxiliary oil channels are columnar, and the middle part and the two ends of the main oil channel are connected to the middle part of the auxiliary oil channel; the two main oil channels are opposite.

[0010] Among the four hole core head sockets on the left sand core, at least one hole core head socket is a stepped groove, which matches the left core head embedded therein, forming a positioning and error prevention structure of the main core and the left sand core;

[0011] Among the four orifice core head recesses on the right sand core, at least one orifice core head recess is a step groove, which matches with the right core head embedded therein to form the positioning and error-proof structure of the main core and the right sand core.

[0012] A hydraulic pump cover pouring system, the pouring system is formed by a straight gate, a high and narrow cross gate, a flat gate, a riser, and a sand mold connection, the sand mold is assembled by a sand core and a sand box; the hydraulic pump cover is divided into upper and lower parts, and the sand core assembly is as follows;

[0013] An inner gate for water feeding and shrinkage is arranged on the right sand core, the inner gate is in the shape of a high right trapezoidal structure and is located above the center line;

[0014] The riser is arranged on the upper mold;

[0015] The riser is connected with the sand mold through the inner gate on the right sand core, and a riser recess is naturally formed from the bottom of the riser to the inner gate on the right sand core.

[0016] The sand mold is two, arranged on both sides of the riser; one drag two design, that is, the molten iron enters the riser from the high and narrow cross gate and simultaneously pours and shrinks two product castings, thereby improving the process yield.

[0017] The pouring system further comprises a filter, the filter is installed at the front end of the high and narrow cross gate; the filter is a foam ceramic filter.

[0018] The present application has the following beneficial effects:

[0019] 1) The combined sand core design is adopted, the main core is used to build the pump cover inner cavity oil channel, each main oil channel and auxiliary oil channel are connected into one, and the two main flow channels are connected by a process core head, which not only ensures the position accuracy of the oil hole connected with the main oil channel, but also strengthens the sand core structure strength, the left and right sand cores are used to position, prevent errors and fix the oil hole position of the auxiliary oil channel, which also ensures the consistency of the oil hole coordinate size and meets the high precision requirement, so that the cast product meets the product design tolerance requirement;

[0020] 2) Research shows that the internal defects of the product are caused by the inability to process shrinkage for the upper half of the hot spot of the product, therefore, an inner gate for water feeding and shrinkage is designed on the right sand core, which is in the shape of a high right trapezoidal structure and is located above the center line, during pouring, the inner gate can be poured and shrunk at the nearest position of the internal quality risk of the product, and the size and height of the riser are reasonably designed, which effectively processes the shrinkage of the upper half of the hot spot of the product and ensures the internal quality of the product without casting defects;

[0021] 3) Naturally formed a riser nest, no need to add a riser nest to store hot molten iron, both to compensate for the role of the internal quality of qualified castings, but also to save iron, reduce manufacturing costs;

[0022] 4) The third generation of advanced foam ceramic filter technology is used, and the filter is arranged at the front end of the high and narrow horizontal runner on the pouring system to block and filter the iron liquid slag and sand. At the same time, a flat runner is designed at the position where the iron liquid enters the riser, so as to further strengthen the purification of the iron liquid and avoid the production of slag and sand holes in the product, thereby improving the machining and cutting performance of the castings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic view of a pouring system structure (top view).

[0024] Figure 2 is a schematic view of a pouring system structure (top view). Figure 1

[0025] Figure 3 is a schematic view of a pouring system structure (top view). Figure 1

[0026] Figure 4 is a schematic view of a pouring system structure (top view).

[0027] Figure 5 is a schematic view of a pouring system structure (top view).

[0028] Figure 6 is a schematic view of a pouring system structure (top view). Figure 5

[0029] Figure 7 is a schematic view of a pouring system structure (top view). Figure 5

[0030] Figure 8 is a schematic view of a pouring system structure (top view). Figure 5

[0031] In the figure, the straight runner 1; the high and narrow horizontal runner 2; the flat runner 3; the riser 4; the sand core assembly 5, the main core 5-1, the main oil channel 5-1-1, the auxiliary oil channel 5-1-2, the process core head 5-1-3, the left core head 5-1-4, the right core head 5-1-5, the left sand core 5-2, the right sand core 5-3, the ingate 5-5-1; the hydraulic pump cover 6; the riser nest 7; the filter 8. DETAILED DESCRIPTION

[0032] As shown in Figures 1-8 , a hydraulic pump cover pouring system, the pouring system is composed of a straight runner 1, a high and narrow horizontal runner 2, a flat runner 3, a riser 4, and a sand mold connected by a sand core assembly 5 and a sand box;

[0033] ​​​​​The sand core assembly 5 is assembled by several sand cores; the sand cores are three, one is the main core 5-1, one is the left sand core 5-2, and one is the right sand core 5-3;

[0034] The main core 5-1 constitutes the internal flow channel of the hydraulic pump cover 6, including two main oil channels 5-1-1 and four auxiliary oil channels 5-1-2, the two main oil channels 5-1-1 are arranged side by side in the hydraulic pump cover 6, and the two ends are respectively connected to the oil ports arranged on the upper and lower surfaces of the hydraulic pump cover 6, the four auxiliary oil channels 5-1-2 are arranged side by side in the hydraulic pump cover 6, and the two ends are respectively connected to the oil ports arranged on the left and right surfaces of the hydraulic pump cover 6, the main oil channel 5-1-1 is perpendicular to the auxiliary oil channel 5-1-2, one main oil channel 5-1-1 intersects with two auxiliary oil channels 5-1-2 in the hydraulic pump cover 6, and the other main oil channel 5-1-1 intersects with the other two auxiliary oil channels 5-1-2 in the hydraulic pump cover 6, and the two main oil channels 5-1-1 are connected through a process core head 5-1-3;

[0035] The left sand core 5-2 is a plate core, and four orifice core head recesses are arranged thereon, the left ends of the four auxiliary oil channels 5-1-2 of the main core 5-1 extend out of the hydraulic pump cover 6, and left core heads 5-1-4 are arranged thereon, the four left core heads 5-1-4 are embedded in the four orifice core head recesses on the left sand core 5-2 one by one, and the main core 5-1 and the left sand core 5-2 are connected;

[0036] The right sand core 5-3 is also a plate core, and four orifice core head recesses are arranged thereon, the right ends of the four auxiliary oil channels 5-1-2 of the main core 5-1 extend out of the hydraulic pump cover 6, and right core heads 5-1-5 are arranged thereon, the four right core heads 5-1-5 are embedded in the four orifice core head recesses on the right sand core 5-3 one by one, and the main core 5-1 and the right sand core 5-3 are connected;

[0037] The middle part of the main oil channel 5-1-1 is semilunar, and the two ends are columnar, the auxiliary oil channel 5-1-2 is columnar, and the middle part and the two ends of the main oil channel 5-1-1 are connected to the middle part of the auxiliary oil channel 5-1-2; the two main oil channels 5-1-1 are opposite;

[0038] Among the four orifice core head recesses on the left sand core 5-2, at least one orifice core head recess is a step groove, which matches the left core head 5-1-4 embedded therein, to form a positioning and error prevention structure of the main core 5-1 and the left sand core 5-2;

[0039] Among the four orifice core head recesses on the right sand core 5-3, at least one orifice core head recess is a step groove, which matches the right core head 5-1-5 embedded therein, to form a positioning and error prevention structure of the main core 5-1 and the right sand core 5-3;

[0040] The right sand core 5-3 is provided with an ingate 5-5-1 for water feeding and shrinkage compensation of the product, and the shape of the ingate 5-5-1 is a high right trapezoidal structure and is located above the center line;

[0041] The riser 2 is arranged in the cope;

[0042] The sand mold 3 is two in total, respectively arranged at two sides of the riser 2;

[0043] The riser 2 is connected with the sand mold 3 through the ingate 5-5-1 on the right sand core 5-3, and a riser nest 7 is naturally formed from the bottom of the riser 2 to the ingate 5-5-1 on the right sand core 5-3;

[0044] The gating system further comprises a filter 8, which is arranged at the front end of the high-narrow cross gate 2; the filter 8 is a ceramic foam filter.

[0045] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A hydraulic pump cover pouring system, the pouring system is formed by a straight sprue, a high and narrow cross gate, a flat gate, a riser, a sand mold connection, the sand mold is assembled by a sand core and a sand box; the hydraulic pump cover is divided into upper and lower halves; characterized in that, The sand core is assembled by several sand cores; the sand core is three, one is a main core, one is a left sand core, and one is a right sand core; the main core constitutes the internal flow channel of the hydraulic pump cover, including two main oil channels and four auxiliary oil channels, the two main oil channels are arranged side by side in the hydraulic pump cover, and the two ends are respectively connected with the oil ports arranged on the upper and lower surfaces of the hydraulic pump cover, the four auxiliary oil channels are arranged side by side in the hydraulic pump cover, and the two ends are respectively connected with the oil ports arranged on the left and right surfaces of the hydraulic pump cover, the main oil channel is perpendicular to the auxiliary oil channel, one main oil channel intersects with two auxiliary oil channels in the hydraulic pump cover, and the other main oil channel intersects with the other two auxiliary oil channels in the hydraulic pump cover, and the end portions of the two main oil channels are connected through a process core head; the left sand core is a plate core, and four orifice core head sockets are arranged on the left sand core, the left ends of the four auxiliary oil channels of the main core extend out of the hydraulic pump cover, and left core heads are arranged on the left ends, the four left core heads are embedded in the four orifice core head sockets on the left sand core one by one, and the main core and the left sand core are connected; the right sand core is also a plate core, and four orifice core head sockets are arranged on the right sand core, the right ends of the four auxiliary oil channels of the main core extend out of the hydraulic pump cover, and right core heads are arranged on the right ends, the four right core heads are embedded in the four orifice core head sockets on the right sand core one by one, and the main core and the right sand core are connected; the middle of the main oil channel is semilunar, and the two ends are columnar, the auxiliary oil channel is columnar, and the middle and the two ends of the main oil channel are connected with the middle of the auxiliary oil channel; the two main oil channels are opposite; among the four orifice core head sockets on the left sand core, at least one orifice core head socket is a step groove, which matches the left core head embedded therein, to form the positioning and error prevention structure of the main core and the left sand core; among the four orifice core head sockets on the right sand core, at least one orifice core head socket is a step groove, which matches the right core head embedded therein, to form the positioning and error prevention structure of the main core and the right sand core; An inner gate for water feeding and shrinkage compensation is arranged on the right sand core, and the inner gate is in the shape of a high right trapezoidal structure and is located above the center line; The riser is arranged on the upper mold; The riser and the sand mold are connected through the inner gate on the right sand core, and a riser socket is naturally formed from the bottom of the riser to the inner gate on the right sand core; The sand mold is two, arranged on both sides of the riser; The gating system further comprises a filter, and the filter is installed at the front end of the high and narrow cross gate; the filter is a foam ceramic filter.

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