JPH0438926Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a core unit assembling device for assembling a core unit formed by combining a plurality of cores into a main mold.

(Prior Art) Generally, when manufacturing a cavity in a casting, a sand mold called a core is set in the main mold in order to prevent molten metal from entering the part corresponding to the cavity during casting. It is being done. For example, when manufacturing a casting with a complex shape such as an engine block, the hollow part, etc. must have a complex shape, so a unit made by combining multiple cores is used. Sometimes,
When assembling such unitized cores into the main mold, a plurality of cores supplied by a core feeder are transferred to a core assembly jig using a core carrier, and the cores are assembled into a core. It has already been proposed that a core unit assembled in a tooling jig is assembled to a main mold using a core setter (see Japanese Patent Laid-Open No. 146450/1983).

(Problem to be solved by the invention) As in the above-mentioned known example, when combining multiple cores in a core assembly jig, if each core is not positioned accurately, the core setter will not be able to hold the core unit. When assembling the core into the main mold, there is a risk that the core will deviate from the predetermined assembly position. In particular, in the case of a core unit made up of multiple cores, variations in dimensions may occur depending on how they are assembled, so it is necessary to assemble the core unit to the main mold before assembling it with a core setter. It is necessary to accurately position the core unit in the attached position and to assemble it into the main mold without changing the position of the core unit in the positioned state. If the core is not assembled accurately to the main mold, it may lead to a decrease in the dimensional accuracy of the casting or to the occurrence of defects such as sand clumps, so there is currently a desire to improve the accuracy of core assembly.

This invention was made in view of the above points,
The purpose is to improve the accuracy of assembling the core unit to the main mold.

(Means for solving the problem) In the present invention, as a means for solving the above problem, a core unit made by combining a plurality of cores is positioned in an assembly posture to the main mold. A transfer means for transferring the core unit to a positioning station; a positioning device provided on the positioning station for positioning the core unit in a main mold assembly posture; In a core unit assembling device equipped with a core setter that acts to assemble the core unit into a mold, the core setter includes a clamp arm that clamps the core unit in a floating state, and a clamp arm that controls movement of the clamp arm after clamping by the clamp arm. A locking means is provided for locking.

(Function) In the present invention, the following effects can be obtained by the above means.

That is, at the positioning station, the core unit, which is positioned in the assembly position to the main mold by the positioning device, is clamped in a floating state by the core setter, and then locked by the locking means to maintain the clamped state, and then the core unit is fixed to the main mold. By assembling the core unit to the main mold, the possibility of assembling errors to the main mold is extremely reduced, and this greatly contributes to improving the assembly accuracy of the core unit.

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

As shown in FIG. 2, the core unit assembling apparatus of this embodiment is constructed by combining a plurality of cores, that is, a cylinder bore core 1a, a cylinder head core 1b, a jacket core 1c, etc. The child unit 1 is transferred to the vertical frameless molding line L (see Figure 3).
As shown in FIG. 1, the core unit is placed on a pallet 3 and is transported to the transfer station _S1 . A positioning station that positions 1 in the assembly posture to the main mold 2
a transfer means 4 for transferring the core unit to S ₂ ; a positioning means 5 provided at the positioning station S ₂ for positioning the core unit 1 in the main mold assembly posture;
A core setter 6 is provided at the assembly station _S3 and operates to clamp the core unit 1 positioned by the positioning means 5 and to assemble it to the main mold 2.

The pallet 3 is conveyed to the transfer station _S1 by a pallet conveying means (not shown) and then positioned.

The transfer means 4 has a movable base 9 that can move forward and backward toward the positioning station S ₂ by a horizontal cylinder 8 fixed on a base 7, and can be raised and lowered by a vertical cylinder 10 fixed to the movable base 9. It is constituted by an elevating table 11 and a pair of clamp members 12, 12 vertically installed on the elevating table 11. The movable base 9 is fixed to the tip of the piston rod 8a of the horizontal cylinder 8, and is moved to the positioning station by the extension of the horizontal cylinder 8.
It is designed so that it can be moved horizontally towards _S2 . On the other hand, the elevating table 11 has a vertical cylinder 10
It is fixed to the tip of the piston rod 10a,
It is adapted to be moved upward by the extension of the vertical cylinder 10. The clamp member 1
2 and 12 are supported in a state opposite to horizontal rods 13 and 13 and feed screws 14 and 14 provided on the lifting platform 11, respectively. The feed screws 14, 14 are configured to be rotated in the forward and reverse directions by the forward and reverse rotation of the motors 15, 15, and the clamp members 12, 12 are moved toward or away from each other by the forward and reverse rotation of the feed screws 14, 14. It is designed to be able to move horizontally. At the upper and lower positions on both sides of the core unit 1, upper and lower protrusions 16, 16 and 17, 17 (fourth
) is provided, and the clamp member 1
2 and 12 are shaped to be able to suspend and hold the upper projections 16 and 16 of the core unit 1 placed on the pallet 3. Therefore, the transfer of the core unit 1 on the pallet 3 is carried out by lifting the lifting table 11 (i.e., by lifting the lift table 11 with the upper protrusions 16, 16 of the core unit 1 suspended by the clamp members 12, 12). 10 extension actuations),
This is performed by the forward movement of the movable table 9 (that is, the extension movement of the horizontal cylinder 8) and the downward movement of the elevating table 11 (that is, the contraction movement of the vertical cylinder 10).

A positioning device 5 for positioning the core unit 1 in the main mold assembly attitude is installed in the positioning station _S2 . The positioning device 5 is
As shown in FIGS. 1 and 5, upper and lower positioning units 19 and 20 are provided which are movable up and down relative to the machine frame 18.

The upper positioning unit 19 is connected to the machine frame 1.
an upper elevating table 22 connected to a piston rod 21a of a drive cylinder 21 fixed to an upper frame 18a of 8; and two pairs of upper positioning arms 2 supported horizontally movably with respect to the upper elevating table 22.
3, 23 and 24, 24, and drive means 25, 26 for horizontally moving these upper positioning arms 23, 23 and 24, 24. Reference numeral 46 denotes a guide rod that guides the upper lifting platform 22 during lifting and lowering operations.

The upper positioning arms 23, 23 and 2
Since the support structures 4 and 24 and the structure of the drive means 25 and 26 are common, only one will be explained below.

The upper positioning arms 23, 23 are supported by support rods 26 mounted on bearing portions 22a, 22a that protrude downward facing the upper lifting platform 22.
The support stand 18c is slidably supported opposite to the machine frame 18 and is provided at a middle position of the machine frame 18
It is configured so that both sides of the upper protrusion 16 formed on the side surface of the core unit 1 transferred from the transfer station _S1 can be held therebetween.

The driving means 25 includes a feed screw 29 rotatably installed between the bearing portions 22a, 22a so as to be parallel to the support rod 22, and the feed screw 29.
A rotating shaft 28a is connected to one end of the motor 28, and a motor 28 is fixed to a bracket 27 vertically installed on the upper lifting platform 22. The feed screw 29 is connected to the upper positioning arms 23, 2.
3 has a right-hand threaded portion 29a and a left-hand threaded portion 29b which are screwed together, respectively, and are adapted to be rotated forward and backward as the motor 28 rotates forward and backward. The upper positioning arms 23, 23 are moved toward or away from each other by forward and reverse rotation of the feed screw 29.

Further, the lower positioning unit 20 includes a lower lifting table 31 connected to a piston rod 30a of a drive cylinder 30 fixed to the lower frame 18b of the machine frame 18, and a lower lifting table 31 connected to the upper positioning unit 19 with respect to the lower lifting table 31. two pairs of first lower positioning arms 32, 32 and 33, 3 supported so as to be horizontally movable in a direction parallel to the two pairs of upper positioning arms 23, 23 and 24, 24;
3, a pair of second lower positioning arms 34, 34 supported with respect to the lower lifting table 31 so as to be horizontally movable in a direction orthogonal to the first lower positioning arms 32, 32 and 33, 33; 1
Lower positioning arms 32, 32 and 33, 33
driving means 35, 36 for horizontally moving the
and a driving means 37 for horizontally moving the second lower positioning arms 34, 34. Reference numeral 47 is a guide rod that guides the lower lifting platform 31 during lifting and lowering operations.

Support structure and drive means 35, 36 for the first lower positioning arms 32, 32 and 33, 33
Since the structure of is common, only one will be explained below.

The first lower positioning arms 32, 32 are installed on bearing parts 31a, 31a which are provided on the lower lifting table 31 and protrude upward so as to face each other and parallel to the bearing parts 22a, 22a of the upper lifting table 22. It is slidably supported on the first support rod 38, and is configured to be able to sandwich both sides of the lower protrusion 17 formed on the side surface of the core unit 1 on the machine frame support stand 18c. ing.

The driving means 35 is connected to the first support rod 38.
a first feed screw 41 rotatably installed between the bearing portions 31a, 31a so as to be parallel to the above, and a rotating shaft 40a connected to one end of the first feed screw 41;
A bracket 39 vertically installed on the lower lifting platform 31
The first motor 40 is fixed to the first motor 40. The first feed screw 41 has a right-hand threaded portion 41a and a left-hand threaded portion 41b into which the first lower positioning arms 32, 32 are screwed, respectively. It is designed so that it can be rotated in forward and reverse directions. and,
By rotating the first feed screw 41 forward and backward, the first lower positioning arms 32, 32 are moved toward or away from each other.

On the other hand, the second lower positioning arm 34 is a second support installed on the lower lifting platform 31 at bearing parts 31b, 31b which are protruded upward in a direction perpendicular to the bearing parts 31a, 31a. It is slidably supported on the rod 42 and is configured to sandwich the outer end surfaces of lower projections 17, 17 formed on both sides of the core unit 1 on the machine frame support stand 18c.

The driving means 37 is connected to the second support rod 42.
a second feed screw 45 rotatably installed between the bearing portions 31b, 31b so as to be parallel to the second feed screw 45;
A rotating shaft 44a is connected to one end of a feed screw 45, and a second motor 44 is fixed to a bracket 43 vertically installed on the lower lifting platform 31. The second feed screw 45 has a right-hand threaded portion 45a and a left-hand threaded portion 45b into which the second lower positioning arms 34, 34 are screwed, respectively. It is designed so that it can be rotated in forward and reverse directions. By rotating the second feed screw 45 forward and backward, the second lower positioning arms 34, 34 are moved toward or away from each other.

Furthermore, as shown in FIGS. 1 and 3, the core setter 6 is guided by a guide rod 68 at an assembly station _S3 to move the core unit 1 to the receiving position and the core unit 1 to the main mold 2. A core setter main body 49 is attached to a movable body 48 that moves between positions so as to be movable toward the main mold 2 on the positioning station _S2 side and the molding line L side, and upper and lower frames 49a of the core setter main body 49, Two pairs of clamp arms 51, 51, 5 supported vertically and slidably on two guide bars 50, 50 installed between 49b.
1, 51, and these clamp arms 51, 51,
It is composed of clamp cylinders 52, 52 which act as driving means for moving the clamp arms 51, 51 up and down, and lock means 53 which locks each clamp arm 51 so that it cannot slide.

The core setter main body 49 has a drive cylinder 54
The main mold 2 on the positioning station _S2 side and the molding line L side can be moved forward and backward by the drive cylinder 54.
The tip of the piston rod 54a is the core setter body 4.
It is attached to 9. When the core setter body 49 is on the positioning station _S2 side or on the molding line L side, the core setter body 49 is guided by the guide rod 69 and moves forward and backward by the contraction and expansion operations of the drive cylinder 54. On the other hand, a piston rod 55a of a drive cylinder 55 is attached to the movable body 48, and the movable body 48 is moved forward and backward toward the positioning station _S2 and the molding line L by the contraction and expansion of the drive cylinder 55. It's getting old.

The clamp arms 51, 51 are opposed to each other and supported by the guide bars 50, 50 so as to be able to clamp the upper and lower surfaces of the core unit 1. It is designed to be able to slide toward or away from each other. In other words, the clamp arm 51,
51 is adapted to clamp the upper and lower surfaces of the core unit 1 in a floating state.

The locking means 53 is attached to each clamp arm 51, as shown in FIG.
a box body 60 having a pressure chamber 61 through which the guide bar 50 is slidably inserted and configured to be able to supply air pressure; a piston 62 located within the pressure chamber 61 and reciprocated by air pressure; The piston 62
A lock piece 63 that slides along the guide bar 50 while being joined to the guide bar 50, and a spring 6 that biases one side of the lock piece 63 in a direction against air pressure.
4, and a stopper 65 that restricts a position of the piston 62 opposite to the spring 64 from sliding. This locking means 53
As shown in FIG. 6A, when air pressure is supplied to the pressure chamber 61, the air pressure overcomes the biasing force of the spring 64, so that the piston 62 and the lock piece 63 are pressed against the guide bar 50. The box body 60 (in other words, the clamp arm 51) is held in a position orthogonal to the body, and is in an unlocked state in which sliding is permitted, as shown in FIG. 6B.
When the air pressure is discharged from the pressure chamber 61, one side of the piston 62 and the lock piece 63, whose other side is prevented from sliding by the stopper 65, is displaced by the biasing force of the spring 64. The inner circumferential surface of the lock piece 63 engages the outer circumferential surface of the guide bar 50, and the box body 6
0 (in other words, the clamp arm 51) is in a locked state in which sliding is restricted. Reference numeral 66 indicates a notch formed on the entry side of the core setter 6 in the machine frame support base 18c, and 67 indicates a back-up cylinder for regulating the swinging of the core unit 1 clamped by the clamp arms 51, 51, 51, 51. It is.

Next, the operation of the illustrated core unit assembling device will be explained.

When the core unit 1 placed on the pallet 3 is conveyed to the transfer station _S1 by a conveyance means (not shown) and positioned, it is positioned at the position shown by the chain line in FIG. The lifting table 11 of the hot transfer means 4 is lowered to the position shown by the solid line by the contraction operation of the vertical cylinder 10, and then the clamp members 12, 12 are slid in the proximal direction by the positive rotation drive of the motor 15, so that the intermediate position is lowered. The upper protrusions 16, 16 on both sides of the child unit 1 are hung and clamped. In this state, the vertical cylinder 10 is extended to raise the lifting platform 11, and then the horizontal cylinder 8 is extended to move the movable platform 9 together with the lifting platform 11 to the positioning station _S2.
After that, the vertical cylinder 10 is contracted to lower the lifting platform 11, and the motor 15 is driven to rotate in reverse to lower the clamp members 12,1.
2 in the separating direction to transfer the core unit 1 onto the machine frame support stand 18c of the positioning device 5. At this time, the upper and lower positioning units 19 and 20 of the positioning device 5 are arranged as shown by the chain lines in FIG.
They are retracted upward and downward, respectively. Thereafter, the transfer means 4 is moved to the vertical cylinder 10
It is returned to its original position by the extension operation of the horizontal cylinder 8 and the contraction operation of the horizontal cylinder 8.

Next, the upper positioning unit 19 and the lower positioning unit 20 of the positioning device 5 are lowered and raised to the solid line positions in FIG. 2
3, 23 and 24, 24 in the proximal direction to sandwich both sides of the upper protrusions 16, 16 on both sides of the core unit 1, and the first and second motors 40, 44
The first lower positioning arm 3 is
2, 32 and 33, 33 and the second lower positioning arms 34, 34, respectively, slide in the proximal direction and sandwich both side surfaces and outer end surfaces of the lower protrusions 17, 17 on both sides of the core unit 1. 1 is positioned in the assembly position to the main mold 2. Positioning by the upper positioning unit 19 and the lower positioning unit 20 is performed accurately by two-stage operation of the first stage of half clamping and the second stage of full clamping by the positioning arms 23, 24, 32, 33, and 34. .

When the positioning of the core unit 1 by the positioning device 5 is completed in this way, the assembly station
The core setter 6 installed in S ₃ is driven by the cylinder 54.
After the positioning station _S2 is moved forward by the extension operation of the clamp cylinder 52,
The upper and lower surfaces of the core unit 1 are floatingly clamped by the clamp arms 51, 51, 51, 51, which are set in a floating state by the operation of the core unit 52. At this time, the locking means 53, 53, 53,
53 are respective pressure chambers 61, 61, 61, 6
1 (see FIG. 6) is supplied with air pressure to release the lock. The floating clamp is performed by imitating the posture of the core unit 1 positioned by the positioning device 5. Thereafter, the air pressure is discharged from the pressure chambers 61, 61, 61, 61 to lock the locking means 53, 53, 53, 53, and the clamp arms 51, 51, 5
1 and 51 to maintain the clamped state of the core unit 1. In this way, when the clamping of the core unit 1 by the clamp arms 51, 51, 51, 51 of the core setter 6 is completed, the positioning device 5
The positioning clamps by the upper positioning unit 19 and the lower positioning unit 20 are released, and they are retracted to the positions indicated by reference numerals 19' and 20', respectively. After that, back up cylinder 6
7, 67, 67, and 67 to restrict the swinging of the core unit 1, the core setter 6 is returned to its original position by the contraction operation of the drive cylinder 54, and then the drive cylinder 55 is extended. The core setter 6 is slid toward the molding line L side, and the core unit 1 clamped by the core setter 6 is opposed to the main mold 2 on the molding line L. In this state, the core unit 1 clamped by the core setter 6 is accurately held in the assembly position to the main mold 2, so the assembly of the core unit 1 to the main mold 2 is carried out on the molding line. This will be done accurately according to the feeding of the main mold L. When the assembly of the core unit 1 to the main mold 2 is completed, the core setter 6
After releasing the clamp on the core unit 1, the core setter 6 is returned to its original position by the contraction operation of the drive cylinder 55.

As described above, according to this embodiment, the transfer means 4
After the core unit 1 is transferred to the positioning device 5 by the positioning device 5 and positioned in the assembly posture to the main mold 2, the core unit 1 is clamped by the core setter 6 while maintaining the assembly posture to the main mold 2. 2, the core unit 1 can be assembled to the main mold 2 with high precision.

In the above embodiment, the core unit is a combination of a cylinder bore core, a cylinder head core, and a jacket core used in engine block casting, but a core unit made by combining a plurality of cores is used as an example. It can also be applied to other child units.

It goes without saying that the present invention is not limited to the configuration of the above-described embodiments, and that the design can be changed as appropriate without departing from the gist of the invention.

(Effects of the invention) As described above, according to the invention, there is provided a transport means for transporting a core unit formed by combining a plurality of cores to a positioning station for positioning it in an assembly attitude to a main mold; A positioning device that is provided on the positioning station and positions the core unit in a main mold assembly posture, and a core setter that acts to clamp the core unit positioned by the positioning device and assemble it to the main mold. In the core unit assembly apparatus, the core setter is provided with a clamp arm for clamping the core unit in a floating state, and a locking means for locking movement of the clamp arm after clamping by the clamp arm, After the core unit, which is positioned in the assembly position to the main mold by the positioning device, is clamped in a floating state by the core setter, the core unit is locked by a locking means to maintain the clamped state, and then assembled to the main mold. Therefore, the possibility of assembly errors to the main mold is extremely low, and the configuration is simple.
This has the excellent effect of allowing the core unit to be assembled to the main mold with high precision.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view of a core unit assembly device according to an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view of the core unit, and Fig. 3 is a cross-sectional view of the core unit shown in Fig. 1. A plan view of the assembly station in the assembly device, FIG. 4 is a view taken in the direction of arrow A in FIG. 1, FIG. 5 is a view taken in the direction of arrow B in FIG. 1, and FIGS. FIG. 4 is a vertical cross-sectional view showing states when released and locked. 1... Core unit, 1a, 1b, 1c... Core, 2... Main mold, 4... Transfer means, 5... Positioning device, 6... Core setter, 51... Clamp arm, 53... Lock Means, S ₂ ... positioning station.

Claims (1)

[Scope of utility model registration request] a transport means for transporting a core unit formed by combining a plurality of cores to a positioning station for positioning the core unit in an assembly attitude to the main mold; a positioning device for positioning the posture;
The core setter includes a core setter that clamps the core unit positioned by the positioning device and assembles it to the main mold, and the core setter includes a clamp arm that clamps the core unit in a floating state; A core unit assembling device characterized in that it is provided with locking means for locking movement of the clamp arm after clamping by the clamp arm.