JPH0716781B2 - Method of manufacturing block body for fluid branching - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a block body for fluid branching. More specifically, multiple ports are collectively arranged,
The present invention relates to a method suitable for manufacturing a block body for fluid branching in which each port communicates with an internal circuit via a distribution circuit.

<Prior Art> Conventionally, in hydraulic piping and pneumatic piping, fluid such as hydraulic oil and compressed air is relayed and branched by a base block.

FIG. 6 is a perspective view showing an example of a conventional base block, in which a first internal circuit (41) and a second internal circuit (42) are provided along the longitudinal direction of the block body (1 ′). In addition, a third internal circuit (43) and a fourth internal circuit (44) are provided along the width direction of the block body (1 '), and the upper surface of the block body (1') is The first port (51), the first port (52), the third port (53), and the fourth port (54) are collectively arranged. Further, one ends of the first internal circuit (41) and the second internal circuit (42) are configured as a T port (T) and a P port (P), respectively, and the third internal circuit (43). ) And one end of the fourth internal circuit (44) are configured as an A port (A) and a B port (B), respectively. The first port (51), the second port (52), the third port (53), and the fourth port (54), which are collectively arranged, respectively, include the first distribution circuit (61). , A second distribution circuit (62), a third
Through the first distribution circuit (63) and the fourth distribution circuit (64), the first internal circuit (41), the second internal circuit (42), the third internal circuit (43), and the fourth internal circuit (42). Is connected to the internal circuit (44). The above ports (51) (52) (53) (54)
(A) (B) and distribution circuit (61) (62) (63) (64)
With regard to the above, as a set, a plurality of sets are provided at predetermined intervals along the longitudinal direction of the block body (1 ').
Further, at both ends of the block body (1 '), bolt insertion holes (71) for attaching the block body (1') to a predetermined portion are formed.

Then, as a method of manufacturing the block body for branching the fluid having the above-mentioned configuration, after forming the solid block body (1 ') by casting, each internal circuit (41) (42) is formed by mechanical drilling such as drilling. (43) (44) and distribution circuit (61) (6
2) The method of forming (63) (64) is generally adopted.

<Problems to be Solved by the Invention> However, according to the method for manufacturing a cylinder block, the internal circuit (41) (42) (43) is formed by machining the solid block body (1 ′) with a mechanical hole. ) (44) and distribution circuits (61) (62) (63) (64), there is a problem that a very large number of processing steps are required and the material yield is low. Especially each port (51) (52)
(53) (54) (A) (B) and distribution circuit (61) (62)
If (63) and (64) are formed in multiples along the longitudinal direction of the block body (1 '), the same hole drilling process needs to be repeated many times, resulting in extremely high production efficiency. However, there was a problem that the manufacturing cost was very high.

<Object of Invention> The present invention has been made in view of the above problems,
An object of the present invention is to provide a method for manufacturing a block body for fluid branching, which has excellent productivity and can improve the material yield.

<Means for Solving the Problems> A method for manufacturing a block body for fluid branching according to the present invention for achieving the above-mentioned object includes a circuit at least a part of the internal circuit at the end of the block body. Circuit part formed by the first vanishing model in the distribution circuit and the internal circuit by connecting a first vanishing model forming a portion including an end of the And a second vanishing model forming an intermediate part of the block body including the remaining circuit part except for embedded in a sand mold, and casting the molten metal in this state, at least the distribution circuit and the internal circuit are After obtaining the formed casting block, a required portion of the casting block is finished.

<Operation> In the method of manufacturing the block body for fluid branching having the above configuration, since the casting block is formed by the casting method using the disappearance model, the distribution circuit and the internal circuit are formed at the same time. It can be formed efficiently. Moreover, as the vanishing model, a combination of the first vanishing model forming the end of the block body and the second vanishing model in which a plurality of unit models of uniform shape are connected is used. Therefore, by appropriately increasing or decreasing the number of constituent units of the unit model, it is possible to increase or decrease the number of constituent units of the port and the distribution circuit. Therefore, it is possible to share a model for casting block bodies for fluid branching in which the number of constituent sets of ports and distribution circuits is different.

<Embodiment> An embodiment will be described in detail below with reference to the accompanying drawings.

FIG. 3 is a perspective view of an essential part showing a base block as a block body for fluid branch obtained by applying the present invention. The basic structure is the same as that of the conventional base block. That is, the first internal circuit (11) and the second internal circuit (12) are provided at predetermined intervals along the longitudinal direction of the block body (1) and along the width direction of the block body (1). A third internal circuit (13) and a fourth internal circuit (14) are provided, and a first port (21), a second port (22), and a second port (22) are provided on the upper surface of the block body (1). Three
Port (23) and the fourth port (24) are collectively arranged. The first internal circuit (11) and the second internal circuit (12) are respectively connected to the T port (T) and the P port (P) formed on the end surface of the block body (1). , A third internal circuit (13) and a fourth internal circuit (1
4) communicates with A port (A) and B port (B) formed on the side surface of the block body (1). Then, the first port (21), the second port (22), the third port (23), and the fourth port (24) that are collectively arranged as described above.
Respectively through the first distribution circuit (31), the second distribution circuit (32), the third distribution circuit (33), and the fourth distribution circuit (34) through the first internal circuit (11). ), The second internal circuit (12), the third internal circuit (13), and the fourth internal circuit (14).

In the base block having the above configuration, the third distribution circuit (33) and the fourth distribution circuit (34) are formed vertically with respect to the upper surface of the block body (1), and each has a third structure. It is orthogonal to the internal circuit (13) and the fourth internal circuit (14). In addition, the first distribution circuit (31),
Regarding the second distribution circuit (32), the predetermined range on the first port (21) side and the second port (22) side, respectively, has an aperture defined by ISO on the upper surface of the block body (1). On the other hand, they are formed vertically, and the ranges from below the vertical portions (21a) (22a) to the first internal circuit (11) and the second internal circuit (12) are at least the XY plane. It is crossed so as to incline at the top.

The above ports (21) (22) (23) (24) (A)
With respect to (B) and the distribution circuits (31), (32), (33) and (34), a plurality of sets are provided at predetermined intervals along the longitudinal direction of the block body (1) as one set. Also,
At both ends of the block body (1), the block body (1)
Has a bolt insertion hole (H) for attaching it to a predetermined portion (see FIG. 2).

Next, a method of manufacturing the base block having the above structure will be described. First, as shown in FIGS. 1A and 1B, a block body (1) is formed by a disappearance model casting method (full molding method, lost foam casting method). ), A casting block (2) having a shape corresponding to That is, as shown in FIG. 1A, a disappearing model (4) formed of a synthetic resin foam such as expanded polystyrene and having a shape corresponding to the block body (1) is embedded in a sand mold (3), As shown in FIG. 1B, the disappearance model (4) is replaced with molten metal by pouring the molten metal in the internal circuits (11) (12) (1
3) A casting block (2) having (14), distribution circuits (31) (32) (33) (34), bolt insertion holes (H) and the like is obtained. At this time, ductile cast iron such as FCD40 is used as a casting material. The disappearing model (4) is foam-molded using a publicly known mold with a slide core.
In the state of FIG. A, each circuit (11) (12) (13) (14) (31) (3) of the vanishing model (4) buried in the sand mold (3)
2) Spaces for forming the (33) and (34) and the bolt insertion holes (H) are filled with sand to form a part of the sand mold (3).

Further, as the fusible model (4) used in the above-mentioned fusible model casting method, as shown in FIG. 4, a pair of first fusible properties having shapes corresponding to both ends of the block body (1) are used. With the second vanishing model (4b) having a shape corresponding to the middle part of the block body (1) interposed between the model (4a), the two are integrated by fitting means or adhesive means. The second vanishing model (4b) above is
A plurality of unit models (4c) each having a shape obtained by equally dividing the middle part of the block body (1) are connected by fitting means, bonding means, or the like. The first vanishing model (4a) is a portion of the block body (1) including a bolt insertion hole (H) and ends of the first internal circuit (11) and the second internal circuit (12). And is for forming this portion. The second vanishing model (4b) corresponds to the rest of the block body (1) excluding the portion formed by the first vanishing model (4a). It is for forming the remaining part. That is, the remaining part means the middle part of the first internal circuit (11) and the second internal circuit (12) in the block body (1), the distribution circuits (31) (32) (33) ( 34), and a portion including the third internal circuit (13) and the fourth internal circuit (14).

Next, as shown in FIG. 1C, the casting block (2) obtained by the above disappearance model casting method is austempered using a salt bath or an electric furnace to obtain ferrite, pearlite, or these. The matrix structure of the casting block (2) composed of the mixed structure of (1) is bainitized and austenized to give desired strength and toughness.

Further, as shown in FIG. 6D, each distribution circuit (31) (32)
(33) A predetermined area (small diameter portion) on the upper side of (34) is finished to a predetermined dimensional accuracy by finishing such as drilling, and if necessary, a predetermined portion such as the upper surface and end surface of the block body (1) is polished. Finished with etc., desired block body (1)
To get

According to the manufacturing method of the base block having the above structure, the internal circuit (11) (12) (13) (14) is manufactured by the disappearance model casting method.
Since the distribution circuits (31) (32) (33) (34) are formed, the circuits can be formed more efficiently than in the case where they are formed by mechanical processing such as drilling. Moreover, as the vanishing model (4), the second vanishing model is formed by connecting the first vanishing model (4a) having a shape corresponding to both ends of the block body (1) and the unit model (4c) having the same shape. Since the one consisting of the model (4b) is used, the above unit model (4c)
By increasing or decreasing the number of connected ports, the ports (21) (22)
(23) (24) (A) (B) and distribution circuit (31) (32)
(33) (34) can be formed in a desired number of sets along the longitudinal direction of the block body (1). Therefore, the vanishing model for the base blocks in which the number of constituent sets of the ports (21) (22) (23) (24) (A) (B) and the distribution circuits (31) (32) (33) (34) is different. (4) can be shared, and eventually the cost of the vanishing model (4) can be reduced. Furthermore, the above block body (1)
Is made of austempered ductile cast iron, it is possible to obtain strength equivalent to that of forged steel in mechanical properties such as tensile strength, impact resistance and toughness, and it can withstand sufficiently as a base block for high pressure piping. You will get it. In addition, since the dimensional accuracy can be obtained by the disappearance model casting method, the workability of the casting block (2) can be reduced.

Regarding the ductile cast iron as the material of the block body (1), for example, C: 2.5 to 4.0 wt%, Si: 1.5 to 3.5 wt%, Mn: 0.1 to 1.0 wt%, Ni: 0.3 to 2.0 wt%, Mo: 0.1
.About.5% by weight, Mg: 0.02 to 0.1% by weight, and the balance being substantially Fe is preferable because the austempering can be easily and stably performed. Further, the austempering treatment is performed by heating the casting block (2) made of the ductile cast iron to 885 to 915 ° C. and holding it for 1 to 2 hours, and then rapidly cooling it to 355 to 385 ° C. It is then allowed to cool, and by the austempering treatment, the volume ratio of the residual austempered structure is adjusted to 30% of that of the base structure.
Can be ~ 40%.

In addition, regarding the block body (1) obtained as described above, a predetermined upper side range of the first distribution circuit (31) and the second distribution circuit (32) is perpendicular to the upper surface of the block body (1). Since the first port (21) and the second port (22) are formed, the contours of the first port (21) and the second port (22) can be formed in a uniform circular shape. Therefore, the opening areas of the first port (21) and the second port (22) can be maximized. Moreover, since the inner depth side of each distribution circuit (31) (32) (33) (34) is made thicker than the port (21) (22) (23) (24) side diameter, The circuit resistance of the part can also be reduced.

The method for manufacturing the block body for fluid branching of the present invention is not limited to the above-mentioned embodiment, and for example, the use of another cast iron material such as gray cast iron as the molten metal, the first fugitive model (4a ) To form the bolt insertion hole (H) and the distribution circuit (31) (32) (33) (34) of the end body of the block body (1), and to form the bolt insertion hole (H) after casting, Internal circuit (11) (12) (13) (14) side of each distribution circuit (31) (32) (33) (34), port (21) (22)
(23) Block body (1) with eccentricity from (24) side
Of the present invention, such as forming vertically to the surface of the base plate (see FIG. 5) and forming each distribution circuit (31) (32) (33) (34) in the same structure as the conventional base block. Various changes can be made without changing the gist.

Further, the block body for fluid branching according to the present invention can be applied to and implemented by a block body for fluid branching other than the above base block such as a stack valve.

<Effects of the Invention> As described above, according to the method for manufacturing a block body for fluid branching of the present invention, since the distribution circuit and the internal circuit are formed by the disappearance model casting method, each circuit can be easily and efficiently formed. As the vanishing model, the first vanishing model forming the end of the block body and the second vanishing model in which a plurality of unit models having a uniform shape are connected are combined as the vanishing model. Since it is used, it is possible to use it as a model for a block body with a different number of constituent groups of ports and distribution circuits by appropriately increasing or decreasing the number of constituent units of the above unit model, and sharing the model. Can be planned.

Therefore, there is a peculiar effect that the manufacturing cost of the fluid branch block body can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic view showing the manufacturing process of the base block, FIG. 2 is a plan view of the base block, FIG. 3 is a perspective view of a main part of the base block, FIG. 4 is a perspective view showing a vanishing model, and FIG. FIG. 6 is a sectional view of a main part showing another embodiment of the base block, and FIG. 6 is a perspective view showing a conventional base block. (1) ... block body, (2) ... cast block, (11)
(12) (13) (14) ... Internal circuit, (21) (22) (23)
(24)… Ports arranged in a group, (31) (32) (33)
(34) ... Distribution circuit, (4a) ... First vanishing model, (4b)
… Second vanishing model, (4c)… Unit model.

Claims (2)

[Claims] 1. A method of manufacturing a block body for fluid branching, wherein a plurality of ports arranged in a group are connected to an internal circuit via a distribution circuit, the method comprising the steps of: A first vanishing model forming a portion including an end portion of at least a part of the internal circuit is connected to a plurality of unit models having a uniform shape, and the first vanishing part of the distribution circuit and the internal circuit. Embedded in a sand mold in combination with a second vanishing model forming an intermediate part of the block body including the remaining circuit part except the circuit part formed by the sex model,
A method for manufacturing a block body for fluid branching, which comprises casting a molten metal in this state to obtain a casting block in which at least a distribution circuit and an internal circuit are formed, and then finishing a required portion of the casting block. . 2. The method for manufacturing a fluid branch block body according to claim 1, wherein ductile cast iron is used as a material for the casting block, and the casting block is subjected to austempering after casting.