JP3025572B2 - Insert insertion device to die casting mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert insertion device configured to insert a sleeve insert into a die in a die casting machine.

[0002]

2. Description of the Related Art Generally, in die casting of an automobile engine block made of an aluminum alloy or the like, a sleeve insert made of steel or the like is inserted into the block in order to improve the wear resistance or strength of a sliding surface. However, at the time of this casting, an insert must be inserted into a mold (movable mold) prior to die casting, and this insertion work has conventionally been generally performed manually. However, the above operation requires a great deal of time and effort and is dangerous.

Accordingly, the present applicant has previously developed a device configured to automatically perform such an insert insertion operation, and has filed a patent application (see Japanese Patent Publication No. 3-66982). That is, the gist thereof will be briefly described. In FIG. 5, the insert insertion device 10 includes a holding unit 12, a driving unit 14, and a pusher 16;
2 advances toward the movable mold 18 via the piston rod 14 a of the drive unit 14, the guide portion (projection in this case) 22 provided on the end surface of the holding shaft 20 of the holding portion 12 Abutment is made on a guide portion (a concave portion in this case) 26 provided on the end face of the holding member 24, and the holding shaft 20 of the holding portion 12 and the core of the mold 18 are provided.
Alignment with the shaft 24 is performed. Next, when the pusher 16 is operated, the holding shaft 2 is pushed through the pushing sleeve 16a.
The sleeve insert 28 held on the core 0 is automatically inserted into a predetermined position on the core shaft 24.

The insert 28 is held on a holding shaft via an elastic member 30 made of rubber or the like. Even if the two guide portions are not butted to a certain extent, in other words, the holding portion 12 and the metal are not fixed. The structure is such that the insert 28 can be displaced and inserted on the core shaft 24 even if the alignment with the mold 18 is not performed to some extent accurately. As described above, the insertion operation can be easily and efficiently achieved by using the insert insertion device.

[0005]

However, the insert insertion device still has the following drawbacks.

That is, in the above device, the holding shaft 20 of the holding section 12 and the piston rod 14a of the driving section 14 are arranged as shown in FIG.
Is fixedly connected as shown by the broken line in FIG. 3, so that even if there is a large misalignment between the holding shaft 20 and the core shaft 24, the insertion of the insert 28 can be performed. But it was practically impossible. That is, the response to the misalignment depends on the range of displacement of the elastic member 30, and the range is substantially very small.

Accordingly, an object of the present invention is to ensure that an insert can be securely and easily positioned at a predetermined position in a mold even if a large misalignment occurs due to a temperature change of the mold between the holding portion and the mold. An object of the present invention is to provide a device for inserting an insert into a die casting mold that can be inserted into a die.

[0008]

Means for Solving the Problems In order to achieve the above object, a first aspect of the present invention is to provide a core shaft having an end face facing the core shaft.
Centering to fit with concave or convex parts provided on the end face
A holding shaft having a convex portion or a concave portion for
A piston rod for advancing toward the core axis.
A driving unit having the core shaft and the holding member in contact with an end surface of the core shaft.
Push to push out the sleeve insert from the outer circumference of the shaft
From the rear end of the holding shaft toward the piston rod.
Around the extended connecting shaft and the outer periphery of the connecting shaft.
A cylindrical bearing member joined to the piston rod,
It is provided in the cylindrical support member so as to face the piston rod.
And the outer peripheral surface of the connecting shaft.
The formed tapered collar portion and the tapered collar portion
Compression spring means for pressing the tapered collar receiving portion.
It is characterized by becoming .

In a second aspect of the present invention, the end face facing the core shaft is
Fits with a concave or convex part provided on the end face of the core shaft
A holding shaft having a convex portion or a concave portion for centering;
A piston for advancing a holding shaft toward the core shaft
A driving unit having a rod, which is in contact with an end surface of the core shaft;
Push the sleeve insert from the outer circumference of the holding shaft
A pusher and extending from the drive section toward the holding shaft
Cylindrical tapered hole member and the tapered hole member
The holding shaft is connected to the rear end of
Tapered shank member and the tapered shank member
Pull stud provided at the tip and this pull stud
Cut the tapered shank member into the tapered hole member
Connecting means for detachably connecting the holding shaft and the holding shaft;
Compression spring means for urging in the mold direction.
Features .

According to a third aspect of the present invention, an end surface facing the core axis is provided.
Into a concave or convex portion provided on the end face of the core shaft.
Holding shaft having a convex or concave portion for centering,
A piston for advancing the holding shaft toward the core shaft
A drive part having a ton rod and abutting against an end face of the core shaft
Press the sleeve insert from the outer periphery of the holding shaft
Pusher and the piston from the rear end of the holding shaft.
A collet chuck gripping shaft extending toward the rod,
So as to surround the outer periphery of the collet chuck gripping shaft.
A cylindrical collet chuck tightening section fixed to the drive section
Material, the collet chuck fastening member and the collet
Collet chuck provided between chuck holding shaft
And moving the collet chuck in the direction of the drive section.
The collet chuck gripping axis to the collet chuck
Moving means for releasing the collet chuck and tightening the collet chuck
Compression spring means interposed between the member and the holding shaft.
It is characterized by having .

In the preferred embodiment of the second invention described above,
The connection means allows the head of the pull stud to be detached.
Facing the head of the pull stud
A push screw provided on the piston and the piston
And put the push screw on the head of the pull stud.
And a pressing cylinder .

In the preferred embodiment of the third invention described above,
The moving means may be a rear end of the collet chuck holding shaft.
And a stopper member extending from the stopper member.
Piston moved backward in the direction of the drive unit
And a cylinder to be driven .

Preferred Embodiments of the First to Third Inventions
In the example, the sleeve insert is provided around the outer periphery of the holding shaft.
The inner peripheral surface of the port is floated from the outer peripheral surface of
Multiple floating members are provided for sexual support
You .

In a preferred embodiment, the float
The rolling member is in rolling contact with the inner peripheral surface of the sleeve insert.
That it has a rolling contact roller means to be.

[0015]

According to the present invention, even if there is a misalignment between the holding portion and the mold, the holding portion is floated and the centering is automatically achieved by detaching the connecting means. Therefore, even if there is a large misalignment state, the insertion of the insert can be reliably and easily achieved.

In this case, if the sleeve insert is configured to be held on the holding portion via the floating member with the rolling contact roller means, the correspondence to the misalignment is further improved, and the damage of the insert is prevented. The sleeve insert having a different inner diameter can be easily replaced by replacing the floating member.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an apparatus for inserting an insert into a die casting mold according to the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, the same components as those of the conventional structure shown in FIG.
Detailed description is omitted.

FIG. 1 shows an embodiment in which the insert insertion device of the present invention is applied to die-casting of a V-shaped engine block. The overall configuration of the device is the same as that of the conventional device shown in FIG. is there. Therefore, although this is duplicated, this will be briefly described again.
Is composed of a holding unit 12, a driving unit 14, and a pusher 16. When the holding unit 12 advances toward the movable mold 18 via the piston rod 14 a of the driving unit 14, a guide unit (a concave portion in this case) 22 provided on the end surface of the holding shaft 20 of the holding unit 12 is moved to the mold 18. The holding portion 12 and the mold 18 are aligned with each other by abutting against a guide portion (a convex portion in this case) 26 provided on the end face of the core shaft 24. Next, when the pusher 16 is operated, the sleeve insert 28 held on the holding shaft 20 is automatically inserted into a predetermined position on the core shaft 24 via the pushing sleeve 16a. In addition, a plurality of insert insertion devices 1
Numerals 0 are arranged on the gantry 32 by the number of cylinders of the V-shaped engine block, and the gantry 32 is a transport means such as a robot (not shown).
When the movable mold 18 is open, it is carried in by the above-mentioned conveying means, and is positioned at a predetermined position with respect to the core shaft 24.

However, in the present invention, the holding portion 12
The drive unit 14 and the drive unit 14 are connected by a detachable connection means, and the insert 28 is held on the holding unit 12 via a floating member. Hereinafter, these configurations will be described with reference to FIG.

First, a detachable connecting means 40 is provided with a tapered collar provided on an outer surface of a connecting shaft 42 extending from the holding shaft 20 of the holding portion 12 in a direction opposite to the guide portion 22 (to the right in the drawing). and parts 42a, a cylindrical bearing member 44 provided in the drive unit 14 so as to surround the tapered collar 42a, this
Tapered collar receiving portion 4 provided in the cylindrical bearing member 44 of FIG.
4a. Thus, the holding unit 12 and the driving unit 14 are configured to be engaged in the separating direction, and the holding unit 12 is located between the opposed ends of the connecting shaft 42 and the support member 44. A compression spring means 46 for pressing to the 24 side is interposed. The support member 44 is fixedly connected to the piston rod 14a via a joining member 48. That is, the compression spring means 46 normally engages the tapered collar portion 42a with the tapered collar receiving portion 44a to engage the connecting means 40 (shown in the figure), and thus drives the holding portion 12 (holding shaft 20). Part 14 (bearing member 4
The axis center line of 4) is matched. Piston rod 14
a, when the holding unit 12 and the core shaft 24 are misaligned when the two guides 22 and 26 abut against each other, the two guides 22 and 26 are brought into contact with the misaligned state and Is temporarily interrupted by the piston rod 1
The reaction force of the forward movement of 4a acts to disengage the connecting means 40, and the connecting means 40 is separated by further advancing the piston rod 14a. Thereby, the holding shaft is configured to be floated and to be translated in the axial direction by the interaction between the two guide portions 22, 26, so that the centering is automatically achieved. In the present embodiment, two connecting portions 40 are provided, but this is not always necessary, and one connecting portion 40 can be used.

Next, the floating member 50 for holding the insert 28 on the holding portion 12 is provided with a plurality of grooves 20a formed in the peripheral surface of the holding shaft 20 in the axial direction (usually at equal angular intervals in the cross section of the holding shaft). (It is preferable to provide three of them). The floating member 50 is provided with rolling contact roller means 54 at both ends thereof via support shafts 54a, and the sleeve insert is slidably held on the roller means 54. Therefore, according to such a configuration, since the insert 28 is held in a floating state on the holding shaft 20, the insertion on the core shaft 24 is performed smoothly, and even if the inner diameter of the insert is changed. By replacing the floating member 50, it is possible to easily cope with the problem. Further, since the floating member 50 is provided with the rolling contact roller member 54 , the wear resistance is almost completely guaranteed. The floating member 50 can be replaced by removing the end member 21 provided on the holding shaft 20.

The operation of the apparatus according to the present invention having such a configuration is already clear from the above description of the configuration. However, if it is described again just in case, when inserting the insert, first, the drive unit 14 (piston rod 14a, The holding portion 12 (holding shaft 20) is advanced through the support member 44),
The two guide portions 22 and 26 are butted. At this time, as shown in the figure, if the butting is correctly performed, in other words, if the holding portion 12 and the core shaft 24 are correctly aligned, the sleeve is operated by operating the pusher 16. 28
Can be immediately inserted into a predetermined position on the core shaft 24. However, accurate alignment is not achieved due to a change in the temperature of the mold 18 or the like, and the two guide portions 22,
26, and the support member 44 is further pressed and advanced thereafter, so that the reaction force of the advance acts to separate the connecting means 40, and by this separation, the holding shaft 20 is floated and the centering is automatically performed. Is achieved. Then pusher 1
6 is operated to insert the sleeve 28 into a predetermined position. Thereafter, by moving the pusher 16 to the right and then to the drive unit 14 to the right, the connecting shaft 42 (holding shaft 20) is moved to the left by the urging force of the compression spring means 46 to engage the connecting means 40.

As described above, according to the present invention, even if a large misalignment occurs between the holding portion and the mold due to a change in the temperature of the mold, the insert can be securely positioned at a predetermined position in the mold. In addition, the insert can be easily inserted and the insert can be prevented from being damaged. Further, inserts having different inner diameters can be easily exchanged and used.

FIG. 3 shows another embodiment of the detachable connection means in the insert insertion device according to the present invention. In the present embodiment, the connecting means 60 includes the holding shaft 20 of the holding unit 12.
And a tapered shank member 62 provided in the drive unit 14 to surround the member. Thereby, the holding unit 12 and the driving unit 14 are configured to be engaged in the approaching direction, and the holding unit 12
Spring means 66 for pressing the mold toward the core shaft 24 of the mold.
Ru KaiSosu between the holding shaft 20 and the tapered hole member 64. Communicating
The connecting means 60 is provided at the tip of the tapered shank member 62.
The tapered shank member 62 via the pull stud 70
Connection means 6 for detachably connecting to tapered hole member 64
8, the connection means 68 being the head of the pull stud 70
A piston 72 holding the detachable 70a,
Provided on the piston 72 so as to face the head 70a of the pad 70.
Activated push screw 72a and piston 72 to pull
The stud 70 comprises a hydraulic pneumatic cylinder 74 for pressing a push screw 72a against the head 70a .

In such a configuration, when inserting the insert, first, the holding portion 12 is advanced through the driving portion 14 (to the left in the drawing), and the guide portion 22 on the holding shaft 20 and the core shaft The 24 guide portions 26 are brought close to the approximate insertion position (illustrated state). In this case, the pullstat head 70a is engaged in the piston 72. Next, a pressurized fluid is supplied to the hydraulic / pneumatic cylinder 74 from the port 74a side, and the piston 72 is moved leftward in the figure.
Then, when the pullstat head 70a is disengaged from the piston 72 and is pushed leftward in the drawing by the push screw 72a, and the connecting means 60 is disengaged, the taper shank member 62 (holding shaft 20) is compressed by the compression spring means. 66
The holding shaft 20 floats due to the biasing force of (1), and as a result, the centering is automatically achieved. Next, the pusher 16 is operated to insert the sleeve 28 into a predetermined position.
Thereafter, the pusher 16 moves to the right and the drive unit 14 moves to the right. The hydraulic fluid is supplied to the hydraulic / pneumatic cylinder 74 from the port 74b side to move the piston 72 to the right, thereby moving the taper shank member 62 to the right. Then, the connecting means 60 is engaged.

FIG. 4 shows still another embodiment of the detachable connecting means in the insert insertion device according to the present invention.
In the present embodiment, the connecting means 80 is provided on the collet chuck gripping shaft 82 extending from the holding shaft 20 of the holding unit 12, the collet chuck 84 engaged with the collet chuck gripping shaft 82, and the drive unit 14 to be further engaged with the collet chuck 84. Tightening cylindrical collet chuck
The attachment member 86 is formed. The holding shaft 20 and co
A compression spring means 88 for pressing the holding portion 12 against the core shaft 24 of the mold is provided between the let chuck fastening member 86 and the holding member 86 . Drive unit 14 and collet chuck tightening member 8
6, the collet chuck 84 is a collet chuck.
Moving means 90 for advancing and retracting movement in the axial direction of the click grip shaft 82 is
The moving means 90 includes a stopper member 92 protruding from the collet chuck gripping shaft 82, a piston 94 fixed to the stopper member 92 to hold the collet chuck 84,
Tighten the collet chuck so that the piston 94 moves forward and backward.
And a hydraulic / pneumatic cylinder 96 provided on the attaching member 86. Note that the collet chuck 84 may be configured to have a taper in a direction opposite to that of the present embodiment.

In such a configuration, when inserting the insert, first, the guide portion 22 and the guide portion 26 are brought close to the insertion position almost as described above (state shown). Next, the port 96b is connected to the hydraulic / pneumatic cylinder 96.
The pressure fluid is supplied from the side, and the piston 92 is moved rightward in the figure. Then, co-collet chuck 84 is right row
It is detached from the let chuck fastening member 86. That is, the connecting means 80 is detached. Accordingly, the holding shaft 20 floats and moves leftward with the urging force of the compression spring means 88 applied, so that the centering is automatically achieved. Then
The pusher 16 is operated to insert the sleeve 28 into a predetermined position. Thereafter, the pusher 16 moves to the right and the drive unit 14 moves to the right.
A pressure fluid is supplied from the side to move the collet chuck 84 to the left, thereby engaging the connecting means 80.

The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0029]

As described above , according to the apparatus for inserting an insert into a die casting mold according to the present invention , the holding of the holding portion is achieved.
Even if a large misalignment occurs between the holding shaft and the core of the mold due to a change in the temperature of the mold, the insert can be reliably and easily inserted into a predetermined position in the mold.

Further, the insert is held by holding means capable of floating with respect to the holding portion, and when the insert is misaligned at the time of pushing and inserting the insert into the mold,
The insert is floated through the holding means so that the misalignment can be automatically corrected, so that the insert can be inserted into the mold without damaging the insert. Can be used for replacement.

[Brief description of the drawings]

1 is a plan view overall the insert insertion device into the die casting mold showing an embodiment applied to die casting of V-shaped engine block according to the first invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view showing one embodiment of an apparatus for inserting an insert into a die casting mold according to the second invention.

FIG. 4 is a cross-sectional view showing one embodiment of an apparatus for inserting an insert into a die casting mold according to the third invention.

FIG. 5 is a plan view showing a conventional device for inserting an insert into a die casting mold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Insert insertion device 12 Holding part 14 Drive part 14a Piston rod 16 Pusher 16a Extrusion sleeve 18 Movable mold 20 Holding shaft 20a Groove part 22 Guide part 24 Core shaft 26 Guide part 28 Insert 32 Mounting stand 40 Connecting means 42 Connecting shaft 42a Tapered collar Part 44 support member 44a taperColor trayPart 46 compression spring means 48 joining member 50 floating member 52 spring means 54 rolling contact roller means 54a support shaft 60 connection means 62 taper shank member 64 taper hole member 66 compression spring means 68ConnectionMeans 70 Pull stud 70a Head 72 Piston 74 Hydraulic and pneumatic cylinder 74a, 74b Port 80 Connecting means 82 Collet chuck gripping shaft 84 Collet chuck 86Collet chuck tightening member  88 Compression spring means 90 Moving means 92 Stopper member 94 Piston 96 Hydraulic pneumatic cylinder 96a, 96b Port

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-55-10376 (JP, A) JP-A-1-180768 (JP, A) JP-A-62-82163 (JP, U) 66982 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22D 17/00 B22D 17/24

Claims (7)

(57) [Claims] (1)Sleeve around core shaft of die casting die
A device for inserting an insert, An end face facing the core shaft is provided on an end face of the core shaft.
Protrusion for mating with the concave or convex part
Is a holding shaft having a concave portion, A piston for advancing the holding shaft toward the core shaft
A driving unit having a ton rod; From the outer periphery of the holding shaft abutting on the end face of the core shaft,
A pusher that pushes out the sleeve insert, Extends from the rear end of the holding shaft toward the piston rod
Connection axis, The piston rod surrounds the outer periphery of the connecting shaft.
A cylindrical bearing member joined to the It is provided in the cylindrical support member so as to face the piston rod.
With a tapered collar receiving part A tapered collar portion formed on the outer peripheral surface of the connection shaft, Press this tapered collar against the tapered collar receiver.
Compression spring means Die characterized by the following:
Insert insertion device to cast mold. (2)Sleeve around core shaft of die casting die
A device for inserting an insert, An end face facing the core shaft is provided on an end face of the core shaft.
Protrusion for mating with the concave or convex part
Is a holding shaft having a concave portion, A piston for advancing the holding shaft toward the core shaft
A driving unit having a ton rod; From the outer periphery of the holding shaft abutting on the end face of the core shaft,
A pusher that pushes out the sleeve insert, A cylindrical telescope extending from the drive section toward the holding shaft.
Paper hole member, So that it fits into the tapered inner peripheral surface of this tapered hole member.
Connected to the rear end of the holding shaft Tapered shank member, A pull stud provided at the tip of this taper shank member
And Forward the tapered shank member through this pull stud
Connecting means for detachably connecting to the tapered hole member; Compression spring means for urging the holding shaft in the mold direction.
Characterized by having Into die casting mold
Sart insertion device. (3)Sleeve around core shaft of die casting die
A device for inserting an insert, An end face facing the core shaft is provided on an end face of the core shaft.
Protrusion for mating with the concave or convex part
Is a holding shaft having a concave portion, A piston for advancing the holding shaft toward the core shaft
A driving unit having a ton rod; From the outer periphery of the holding shaft abutting on the end face of the core shaft,
A pusher that pushes out the sleeve insert, Extends from the rear end of the holding shaft toward the piston rod
Collet chuck gripping shaft, So as to surround the outer periphery of the collet chuck gripping shaft.
A cylindrical collet chuck tightening section fixed to the drive section
Materials and This collet chuck fastening member and the collet chuck
A collet chuck provided between the gripping shaft and Move the collet chuck in the direction of the drive unit to
The collet chuck gripping shaft is moved from the collet chuck
Means of transportation to release; Between the collet chuck fastening member and the holding shaft
Interposed compression spring means.
 Insert insertion device to die casting die. 4. The connecting means includes a head of the pull stud.
A piston having a detachable part and the pull stud
Set screw provided on the piston facing the head of
Activating the piston to move the head of the pull stud
And a cylinder for pressing the push screw.
3. The apparatus for inserting an insert into a die casting mold according to claim 2, wherein: 5. The collet chuck according to claim 5 , wherein
A stopper member extending from the rear end of the gripping shaft and this stopper
And a piston fixed to the
And a cylinder that retracts in the direction of the moving part.
The apparatus for inserting an insert into a die casting mold according to claim 3 . 6. The sleeve shaft is provided on an outer periphery of the holding shaft.
The inner peripheral surface of the insert is floated from the outer peripheral surface of the holding shaft.
Provide multiple floating members to elastically support
6. The method according to claim 1, wherein
An apparatus for inserting an insert into a die-casting die described in any of the above . 7. The floating member according to claim 3 , wherein:
With rolling contact roller means for rolling contact with the inner peripheral surface of the insert
7. The apparatus for inserting an insert into a die casting mold according to claim 6, wherein: