JP2800979B2 - Cylinder block casting equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cylinder block casting apparatus in which a cylinder liner and a bearing insert are co-cast together with a base metal.

(Prior art) In general, a die-casting method using a mold is adopted for a cylinder block made of an aluminum alloy. In this case, the strength and abrasion resistance of a cylinder sliding surface or a bearing portion supporting a crankshaft are provided. In order to ensure the performance, it is customary to set a cylinder liner and a bearing insert made of cast iron on the mold side, and co-cast this with a base metal.

And when setting a cast-in member such as a cylinder liner on the mold side in this way, conventionally, for example, generally, for example,
As disclosed in Japanese Patent Publication No. 58-13264, the cast-in member is held on a movable frame configured to be able to enter an intermediate position with the mold open, and this is placed on the mold side. A device provided with a setting means that can be delivered was used.

(Problems to be Solved by the Invention) However, in the above-mentioned known example, since only the setting means of the cylinder liner is provided on the movable frame, it is necessary to set a bearing insert in addition to the cylinder liner. A separate setting means must be prepared and the bearing insert must be set in a step different from the setting of the cylinder liner, resulting in poor work efficiency.

Further, the movable frame is provided with only the setting means of the cylinder liner set on one of the mold sides, and the reaction force at the time of setting the cylinder liner is directly applied to the possible frame. It is required to have a simple configuration, the device becomes large for a single function,
There is a problem that leads to an increase in cost.

Therefore, the present invention is to provide a cylinder block casting apparatus which can set a cylinder liner and a bearing insert into a mold more efficiently and in a short time, and can reduce the cost of the apparatus itself. Things.

(Means for Solving the Problems) According to the present invention, as a concrete means for solving such problems, a first abutting or separating member which can be mutually abutted and forms a cavity therein in the abutting state.
A mold and a second mold are provided, and a bearing insert is arranged on the first mold side, and a cylinder liner is arranged on the second mold side. The bearing insert and the cylinder liner are arranged together with the base metal. In a cylinder block casting apparatus adapted to be co-cast, the bearing insert is held on a movable base which can enter between the first mold and the second mold in a separated state, and A bearing insert setting means for transferring and setting in a predetermined state while being inserted into an insert receiving portion disposed on the first mold side, and a liner receiving portion supporting the cylinder liner and disposing the cylinder liner on the second mold side. Cylinder liner setting means for transferring and setting in a predetermined state while being inserted into Ri attached and it was characterized that is as constructed and operative further the bearing insert set means and the cylinder liner set means and is substantially at the same time.

(Operation) Since the present invention has such a configuration, (1) the cylinder liner and the bearing insert can be set in one process in a short time by operating the liner setting means and the bearing insert setting means substantially simultaneously. (2) Since the cylinder liner setting means and the bearing insert setting means operate at substantially the same time, the reaction force accompanying the setting of the cylinder liner and the setting of the bearing insert on the movable base from opposite directions. The reaction force is applied at the same time to cancel each other out, and the substantial load applied to the movable base is reduced as much as possible.

(Effects of the Invention) Therefore, according to the cylinder block casting apparatus of the present invention, (1) the cylinder liner and the bearing insert can be set to the mold in one process in a short time.
The work efficiency of setting the cylinder liner and the like and thus the work of casting the cylinder block can be improved. (2) Despite the configuration in which the cylinder liner and the bearing insert are set at the same time, the movable base Since the load applied to the table is reduced as much as possible, the movable member can be made smaller and lighter, and the cost of the apparatus can be reduced.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 and 2 show a die casting type casting apparatus Z according to an embodiment of the present invention. This casting device Z
As shown in FIG. 1, a cylinder block 80 of a V-type 6-cylinder engine made of an aluminum alloy is formed.
The cylinder block 80 co-casts a cylinder liner 6 made of cast iron on a sliding surface of each of the cylinders 81, 81, and a bearing insert 7 made of cast iron on a crankshaft bearing portion 82 together with a base metal. Therefore, it is necessary to set these co-cast members in the mold before the mold is set. As described later, a mechanism for this is provided in parallel with the mold. The bearing insert 7 is integrally formed in a semicircular shape with a flange. An oil hole 71 is formed in the center of the circular arc portion, and bolt receiving holes 72, 72 are formed in the flange portions on both sides thereof. ing.

Hereinafter, a specific configuration of the casting apparatus Z including the co-casting member setting means will be described.

As shown in FIGS. 1 and 2, the casting apparatus Z includes a first mold 1 attached to a fixed platen 9 and an abutment or separation with respect to the first mold 1 attached to a movable platen 8. A second mold 2 which is made possible, and four slide dies 3, 3 which are slidably mounted on the movable platen 8 and which can be abutted or separated from the second mold 2 from all sides. , ・ ・Then, the second mold 2 is brought into contact with the first mold 1 and each of the slide molds 3, 3,.
Is abutted against the second mold 2, whereby a predetermined cavity is formed between each of the molds.

Among the first mold 1 and the second mold 2, the first mold 1 is for molding the lower surface side of the cylinder block 80, that is, the crankshaft bearing portion 82 side, and has a cavity surface 1a. At four positions (see FIG. 2) separated by a predetermined distance, as shown in FIG. 1, a long first guide pin 15 and two short second guide pins 16, 16 are provided. The first guide pins 15 are erected at predetermined intervals with the first guide pins 15 positioned in the middle. Each of the guide pins 15, 16, 16 corresponds to an insert receiving portion in the claims. The first guide pin 15 is provided in the oil hole 71 of the bearing insert 7, and the bolt receiving hole 72 is provided. , 72, the second guide pin 1
The mounting positions are set such that the six and the sixteen correspond to each other and can be fitted therein. In addition, each of these guide pins 15,1
6 has an axial length such that the bearing insert 7 projects outward from the bearing insert 7 in a state where the bearing insert 7 abuts against the cavity surface 1a of the first mold 1 as shown by a chain line in FIG. As shown in FIG. 3, the oil hole 71 is formed in the cylinder block 80 by the protruding portion.
An oil passage 83 continuous with the bolt hole 72 and a pilot hole 84 continuous with the bolt receiving hole 72 are formed.

On the other hand, the second mold 2 is provided with the cylinder block 80.
Of the cylinders 81, 81,... Side, and the cavity surface 2a is provided with the respective cylinders 8
1,81 ,. ・ Water jacket 85,8 formed around
(See FIG. 2) A pair of upper and lower cylindrical jacket cores whose axes are shifted by a predetermined dimension in the cylinder arrangement direction and have a predetermined crossing angle α so as to correspond to the formation position. Three sets of 21, 21 are formed at predetermined intervals, that is, a total of six sets are formed.

A large-diameter shaft-shaped cylinder core 22 is attached to the inside of each of the jacket core portions 21, 21... So as to be able to advance and retreat in the axial direction. A liner fitting gap 23 into which the cylinder liner 6 is fitted is formed between the inner peripheral surface and the outer peripheral surface of the cylinder core 22. The top surface 22a of the cylinder core 22
Has a fitting recess 24 having a predetermined depth. In this embodiment, the cylinder core 22 corresponds to a liner receiving portion in the claims.

In order to set the bearing insert 7 on each of the guide pins 15 and 16 of the first mold 1 and the cylinder liner 6 on each of the cylinder cores 22 of the second mold 2, In the example casting apparatus Z, a direction perpendicular to the mold opening direction of the second mold 2 (arrow A in FIG. 2)
(B direction), the movable base 10 is disposed between the first mold 1 and the second mold 2 and the movable substrate
On the side surface 10a of the first mold 1 on the side of the ten, four bearing insert setting heads 12, 12,.
Six liner setting heads 11, 11,... Described later are attached to the side surface 10b on the mold 2 side. Hereinafter, specific configurations of the bearing insert setting head 12 and the liner setting head 11 will be described in detail.

Bearing Insert Setting Head 12 The bearing insert setting head 12 is brought into and out of contact with the first mold 1 by a pushing cylinder 13 fixed to the movable base 10, as shown in FIGS. A first guide pin is provided inside a base plate 30 movably mounted in the direction (the direction of arrow CD in FIG. 2).
A guide cylinder 31 in which a slidable fitting 32 is inserted, and a second
A pair of upper and lower guide rods 33, 33 in which guide pins 34 are slidably fitted, are attached so as to sandwich the guide tube 31 up and down. The arrangement interval between the pair of guide rods 33 is set so as to match the interval between the second guide pins 16 of the first die 1.

The first guide pin 32 is connected to the bearing insert 7.
And is supported so as to always protrude outward by the air pressure of the pressurized air introduced into the pressure chamber 35 on the back side thereof.
The position of the first guide pin 32 in the protruding direction is regulated by engaging a stopper 36 provided on the guide cylinder 31 with a stopper bolt 37 provided at the rear end of the first guide pin 32.

On the other hand, the second guide pin 34 is inserted into the bolt receiving hole 72 of the bearing insert 7 to support an end thereof, and always projects outward by air pressure introduced into the pressure chamber 38. As well as being urged, the position in the projecting direction is restricted by the stopper 39 similarly to the first guide pin 32.
And the stopper bolt 40. The guide rod 33 is supported by the movable base 10 via a slide bearing 41 so as to be slidable in the axial direction.

In addition, the base plate 30
Is set to be larger than the urging force of the first guide pin 32 and the second guide pin 34 due to the air pressure.

In this embodiment, the base plate 30 and the pushing cylinder 13 are shared by the two sets of bearings 12 and 12 for setting the insert.

The bearing insert 7 is connected to the first mold 1 by the bearing insert setting head 12 configured as described above.
When the bearing insert 7 is set on the side, first, the bearing insert 7 is supported by the protruding guide pins 32, 34, 34 as shown by the solid line in FIG. Of the mold is retracted backward from the mold cavity position).

When the pushing cylinder 13 is extended from this state, the guide cylinder 31 and the guide rods 33, 33 together with the base plate 30 move forward (with the first mold 1) while supporting the bearing insert 7 by the guide pins 32, 34, 34 thereof. Side). Then, each of the guide pins 32, 34, 34 is connected to the first guide pin 15 and the second guide pin 16, 1 on the first mold 1 side.
After the cylinder 13 for pushing is further extended after contacting the guide pins 6, the respective guide pins 32, 34, 34
The guide pins 15 and the second guide pins 16 are retracted by the guide pins 15 and the first guide pins 15 and the second guide pins 16 and 16 are inserted into the bolt receiving holes 72 and the oil holes 71 of the bearing insert 7. Into the bearing insert 7
Is transferred from the guide pins 32, 34, 34 to the first guide pin 15 and the second guide pins 16, 16. Also,
At this time, the bearing insert 7 itself is
It is moved to the first mold 1 side by the pushing force of the pushing cylinder 13 through 33, 33, and abuts against the cavity surface 1a of the first mold 1 as shown by a chain line in FIG. The setting of the bearing insert 7 in the first mold 1 is completed.

After the setting of the bearing insert 7 is completed, the pushing cylinder 13 is retracted to prepare for the next setting operation.

Liner setting head 11 As shown in FIGS. 1 and 2, two liner setting heads 11 are vertically arranged so as to be coaxially spaced from and opposed to the cylinder cores 22, 22,. Three sets, six in total, are arranged in an intersecting state and separated by a predetermined distance in the cylinder arrangement direction. Head 11 for this liner set
Will be described in detail with reference to FIG.

The liner setting head 11 is fixed to the movable base 10 upright, and has a fixed rod 51 having an outer dimension slightly smaller than the inner diameter of the cylinder liner 6. The movable rod 52 has a substantially bottomed cylindrical shape and is inserted. A first pressure chamber 58 and a second pressure chamber 59 are formed between the two rods by a first piston 53 attached to the distal end of the fixed rod 51. The distal end surface 52a of the movable rod 52 includes
A fitting projection 63 that can be fitted to the fitting recess 24 of the cylinder core 22 is formed.

Therefore, when the pressurized air is introduced into the first pressure chamber 58, the movable rod 52 projects outward from the fixed rod 51 (the state of the liner setting head 11 shown in the upper part of FIG. 1). By introducing pressurized air into the second pressure chamber 59, the movable rod 52 is reduced and stored on the fixed rod 51 side (the state of the liner setting head 11 shown in the lower part of FIG. 1).

On the other hand, a guide sleeve 55 with a flange is fitted and fixed at a predetermined interval outside the movable rod 52, and the guide sleeve 55 is moved integrally with the movable rod 52. A second piston 54 having an axial length of about half of the guide sleeve 55 is disposed between the movable rod 52 and the guide sleeve 55,
The proximal end of the guide sleeve 55 by the second piston 54
A third pressure chamber 60 is formed at a position near 55a. Also,
The second piston 54 is constantly urged toward the third pressure chamber 60 by a return spring 61 disposed between the second piston 54 and a stopper 62 provided at the distal end of the guide sleeve 55.

Therefore, the second piston 54 is normally provided with a return spring.
Due to the urging force of 61, the guide sleeve 55 is immersed in the proximal end side (the state shown in the lower part of FIG. 1).
When the pressurized air is introduced into the pressure chamber 60, it is made to protrude toward the distal end (the state shown in the upper part of FIG. 1).

Then, as shown in the liner setting head 11 on the lower side in FIG. 1, the cylinder liner 6 is fitted to the outside of the movable rod 52 and in contact with the distal end surface 54a of the second piston 54. It is inserted and held.

When the cylinder liner 6 is set on the cylinder core 22 of the second mold 2 using the liner setting head 11 configured as described above, first, the movable base
With the 10 retracted from each mold, the cylinder liner 6 is attached to the liner setting head 11 in a contracted state as shown in the lower part of FIG.

In this state, the movable base 10 is advanced to a predetermined position in the middle of the mold. Then, here, pressurized air is introduced into the first pressure chamber 58 to make the movable rod 52 protrude, and the fitting projection at the tip thereof is provided.
The liner setting head 11 is positioned by fitting the 63 into the fitting concave portion 24 of the cylinder core 22. At this time,
The second piston 54 moves integrally with the movable rod 52 in the contracted state.

Thereafter, pressurized air is introduced into the third pressure chamber 60 to make the second piston 54 protrude. Then, the cylinder liner 6 is pushed forward by the second piston 54 and delivered to the cylinder core 22 side (the state shown in the upper part of FIG. 1).

Method of using the casting apparatus Z The liner set heads 11, 11,.
When the cylinder block 80 is formed by casting using the casting apparatus Z according to the embodiment of the present invention including the heads 12 and 12 for bearing insert setting, the movable base 10 is moved outward from the mold. , The cylinder liners 6 are respectively mounted on the respective liner set heads 11, 11,...
Set the bearing inserts 7, 12, 12, ... respectively.

Thereafter, the movable base 10 is advanced to a predetermined position in the middle of the opened mold. In this state, first, the heads 12, 12,... For each bearing insert set are simultaneously operated, and the bearing inserts 7, 7,. And set it. Each of the bearing insert setting heads 12, 12,... Is used to set the bearing inserts 7 until the setting of each cylinder liner 6 by the subsequent liner setting heads 11, 11,. Condition (ie, head 12 for bearing insert set)
(In a state where the bearing insert 7 is pressed against the first mold 1 side by the guide rods 33, 33).

On the other hand, on the liner set head 11 side, of the pair of liner set heads 11
For example, each of the liner set heads 11, 11, 11 in the upper position is simultaneously operated with each of the bearing insert set heads 12, 12,. Transfer it to 22 and set it in place. When the delivery of the cylinder liner 6 is completed and the respective upper liner setting heads 11, 11, 11 return to the initial position, subsequently, the lower liner setting heads 11, 1, 11 at the respective lower positions.
By operating the cylinders 1 and 11, the cylinder liners 6 are transferred to the corresponding cylinder cores 22 and set.

And the heads 11, 11, for each liner set on this lower side
When the setting operation of the cylinder liner 6 by the step 11 is completed, the respective lower liner setting heads 11, 11, 11 and the respective bearing insert setting heads 12, 12,.

When the setting of each cylinder liner 6 and the bearing insert 7 is completed, the movable base 10 is retracted from the middle position of the mold, and thereafter, the second mold 2 and each slide mold 3, 3,.
Is closed to form a cavity therein. In this state, a molten metal is poured into the cavity from a pouring device (not shown) to form the cylinder block 80.

As described above, in the casting apparatus Z of this embodiment, since the movable base 10 is provided with the liner setting head 11 and the bearing insert setting head 12, the cylinder liners 6 and the bearing inserts 7 can be combined in one process. It can be set in predetermined dies 1 and 2, for example, compared with the case where the set of cylinder liner 6 and the set of bearing insert 7 must be performed in separate processes using separate devices. Therefore, it is possible to promote the improvement of the working efficiency and the cost reduction.

In addition, since the head 11 for the liner set and the head 12 for the bearing insert set are arranged in directions opposite to each other with respect to the movable base 10, and since they are operated almost simultaneously, the movable base 10 if,
The reaction force at the time of setting the cylinder liner 6 and the reaction force at the time of setting the bearing insert 7 are offset and reduced as much as possible. Therefore,
The set load applied to the movable base 10 in a substantially appropriate manner is, for example, smaller than that in a case where only one side of the movable base 10 is provided with a setting head such as a liner. This makes it possible to reduce the strength performance of the base 10 to reduce its size and weight and simplify its structure.

Furthermore, in this embodiment, when the bearing insert 7 is set by the bearing insert setting head 12, the bearing insert setting head 12 and the first guide pin on the first mold 1 side are used.
Since the movable base 10 can be positioned in the forward and backward directions by the 15 and the second guide pins 16 and 16, for example, the operation of the liner setting head 11 is performed following the operation of the bearing insert setting head 12. Accordingly, the liner setting head 11 can be positioned without providing any dedicated positioning mechanism, and the cost of the apparatus can be reduced as compared with the case where the dedicated positioning mechanism is provided.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a casting apparatus according to an embodiment of the present invention, FIG. 2 is a view taken along the line II-II of FIG. 1, and FIG. 3 is a longitudinal cross-sectional view of a cylinder block. DESCRIPTION OF SYMBOLS 1 ... 1st metal mold 2 ... 2nd metal mold 3 ... Slide type 6 ... Cylinder liner 7 ... Bearing insert 10 ... Movable base 11 ... Head for liner set 12 ... Head for bearing insert set 15 First guide pin 16 Second guide pin 22 Core 30 for cylinder Base plate 31 Guide cylinder 32 First guide pin 33 Guide rod 34 Second guide pin 51 …… Fixed rod 52 …… Movable rod 53 …… First piston 54 …… Second piston

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuo Takeuchi 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Co., Ltd. (56) References JP-A-59-189059 (JP, A) JP-A-59 −156562 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B22D 17/00, 17/24

Claims (1)

(57) [Claims] A first mold and a second mold which are mutually abuttable or separable and form a cavity therein in the abutted state; and wherein the first mold has a first mold and a second mold. A cylinder block casting apparatus in which a bearing insert and a cylinder liner are arranged on the second mold side, respectively, and the bearing insert and the cylinder liner are co-cast with a base metal, wherein the cylinder block is separated from the second block in a separated state. The bearing insert is held on a movable base that can be inserted between the first mold and the second mold, and is delivered while being inserted into an insert receiving portion arranged on the first mold side. And a bearing insert setting means for setting the cylinder liner in a predetermined state, and supporting the cylinder liner and mounting the cylinder liner on the second mold side. Cylinder liner set means for transferring and setting in a predetermined state while being inserted are attached in opposite directions in a substantially back-to-back state, and the bearing insert set means and the cylinder liner set means are configured to operate substantially simultaneously. An apparatus for casting a cylinder block.