JP2939630B2 - Mold changing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Industrial Application Field The present invention relates to a mold for selecting and exchanging a desired one from a plurality of molds according to the type of work. More particularly, the present invention relates to a mold exchanging apparatus suitable for use in a deburring apparatus that cuts and removes burrs generated at an edge of a casting by a press machine.

(2) Prior Art For example, in a casting obtained by casting an aluminum alloy such as an engine block of an automobile, a large number of burrs are generated on an outer periphery and an edge of a hole. Conventionally, such burrs are removed by using a robot having a cutting tool as described in Japanese Utility Model Application Laid-Open No.
As described in Japanese Patent No. 56957, this is performed using a press machine equipped with an upper die and a lower die having a cutting tool.

(3) Problems to be Solved by the Invention By the way, when performing deburring using a robot, it is necessary to move a cutting tool along a location where burrs are generated. On the other hand, it is time-consuming and inefficient. On the other hand, deburring using a press machine can remove all burrs in a single press operation, and is therefore much superior in terms of working speed. However, when performing deburring using a press machine, it takes a lot of work to select a necessary mold from a large number of dedicated molds prepared according to the type of work and set the mold on the press machine. There are inconveniences.

The present invention has been made in view of the above circumstances, and has as its object to provide a mold changing apparatus capable of efficiently performing a mold changing operation for a press machine.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention selects a desired plate from a plurality of plates on which a die is placed on a top surface of a press machine. A mold changing device for supplying on a bolster,
At the front end and the rear end of each plate, hooks having a U-shaped cross section are provided upward or downward to connect adjacent plates inseparably in the front-rear direction and separable in the left-right direction, and connect these connected plates to the front and rear of the bolster. A traveling body that is movably supported along an extended transfer path and that is connected to a driving source and driven to reciprocate in parallel with the transfer path is connected to the frontmost and rearmost plates via the hooks. This is the first feature.

According to a second feature of the present invention, in addition to the first feature, positioning means for stopping a plate on which a desired mold is placed on the bolster is provided in the transfer path.

Further, in addition to the first feature, the present invention is characterized in that a bolster on which a plate on which a desired mold is placed is fixed is provided so as to be movable in the left-right direction between a press position and a work transfer position. The feature of.

(2) Operation According to the first feature of the present invention having the above-described configuration, when the traveling body is reciprocally driven by the driving source, the plurality of plates connected to the traveling body via the hooks move along the transfer path. The plate on which the desired mold is placed is supplied onto the bolster of the press machine. Adjacent plates, and plates at the front end and the rear end and the traveling body can be separated by hooks, and the plates can be removed and replaced as needed.

According to the second feature of the present invention, the plate can be precisely positioned on the bolster by the positioning means.

Further, according to the third aspect of the present invention, when the bolster is moved in the left-right direction for the transfer of the work, the hook for connecting the plate supported on the bolster to the adjacent plate or the traveling body is automatically turned on. And the plate can be moved in the left-right direction integrally with the bolster.

(3) Example Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 3 are an overall plan view, an overall front view, and an overall side view showing an embodiment of the present invention, respectively.
A mold changing device DC for selectively supplying three plates P on which three types of dies D corresponding to the types of workpieces to be deburred on the press machine PM, centering on the PM, A clamp device C for fixing the selected plate P on the bolster B moving between the press position of the press machine PM and the work transfer position, and a burr obtained by inverting and cutting the bolster B together with the plate P at the work transfer position. Device R for discharging the burrs dropped from the reversing device R to the transfer device T, and a loading conveyor C for loading or unloading the workpiece to or from the workpiece transfer position.
i, a carry-out conveyor C ₀ , and a detector S for detecting the type of work sent by the carry-in conveyor Ci. The press PM has a hydraulic ram OR along the guide support GR.
Is provided with a gripper G on a die plate DP driven up and down by pressing the workpiece with an upper die Du clamped on the gripper G and a lower die Dl provided on the plate P clamped on the bolster B. Deburring is performed.

As shown in FIGS. 4 and 5, the plate P is composed of a plate having an upper flange 1 and a lower flange 2 protruding on both right and left sides, and the pallet P is clamped to the bolster B on the lower flange 2. with the clamp hole 2 ₁ is formed to be used in the two positioning holes 3 that is used to position the pallet P on the bolster B is formed on the left and right of the main body portion. Hooks 4 and 5 having a U-shaped cross section are fixed to both front and rear ends of the plate P, and one hook 4 whose upper part is open and the other hook 5 whose lower part is open are engaged with each other so that the adjacent plate P Are interconnected. Each plate P is inseparably connected in the front-rear direction (arrow X direction) due to the shape of both hooks 4 and 5, but the connection is released by relative movement in the left-right direction (arrow Y direction). Have been. In addition, plate P
The lower die Dl of the press die D mounted on the upper surface of the plate D is mounted on the upper surface of the plate P via a spring 6, and the upper die Du is superposed on the lower die Dl so as to be separable.

Next, the structure of the mold exchanging device DC will be described in detail with reference to FIGS. The mold changing device DC includes a machine frame 7 supported on the floor and extending in the front-rear direction. A bolster B of the press PM is provided at the center of the machine frame 7 in the front-rear direction so as to be movable in the left-right direction. ing. On the right and left sides of the upper part of the machine frame 7, three plates P connected by the hooks 4 and 5 are provided.
A large number of rollers 8 for movably supporting are provided,
A transfer path 9 for the plate P is formed along these rollers 8. The plate P passing through the upper part of the bolster B when reciprocating along the transfer path 9 is supported by two rows of left and right ball bearings 10 disposed on the bolster B and flush with the upper surface of the roller 8. And 4 on the left and right sides
It is guided and moved by the individual guide members 11 (see FIG. 9).

A pair of left and right rails 12 is laid under the machine frame 7 in parallel with the transfer path 9. Each rail 12 is engaged with four left and right traveling support members 15 each having a main roller 13 rolling on the upper surface thereof and sub-rollers 14 rolling on both left and right side surfaces. A traveling frame 16 formed in a rectangular shape in a plan view is supported so as to be movable in the front-rear direction. A turret-shaped traveling body 17 is attached to each of the front and rear ends of the traveling frame 16, and hooks 4, 5 provided on the front and rear plates P of the three plates P are attached to a connecting plate 18 fixed to the upper surface thereof.
Hooks 4 and 5 are provided to engage with the hooks. The first rod 20 of the first drive cylinder 19 fixed to the floor is connected via a joint 23 to the second rod 22 of the second drive cylinder 21 fixed to the lower surface of the traveling frame 16. Thus, by selectively expanding and contracting both drive cylinders 19 and 21, the traveling frame 16 is
Travels on the rail 12, and three plates P connected to the traveling frame 16 via the traveling body 17 and the connecting plate 18 move along the transfer path 9, and any one of the plates P is connected to the bolster B.
Can be stopped on.

A pair of left and right positioning cylinders 24 are provided upward in the vicinity of the press machine PM in the transfer path 9, respectively.
A positioning pin 27 provided at the tip of the rod 25 and raised and lowered along the guide member 26 faces the positioning hole 3 formed in the pallet P on the transfer path 9 so as to be fitted. Then, when any of the plates P is on the bolster B, in order to position the plate P on the bolster B,
The positioning pin is inserted into the positioning hole 3 of the adjacent plate P.
27 is fitted.

As shown in FIGS. 9 and 10, the bolster B is slidably supported via two sliders 30 on two outer rails 29 laid horizontally on a base 28 of the press PM. ing. The sliding member 32 in the two inner rails 31 parallel to laid the outer rail 29 is supported slidably, embedded in the bolster B in a recess 32 ₁ formed on the upper surface of the sliding member 32 The pin 33 that has been engaged is detachably engaged. The bearing 34, 35 provided on the left and right ends of the base 28, the screw shaft 36 are two inner rails 3 that is screwed to the female screw portion 32 ₂ provided on the sliding member 32
The screw shaft 36 is rotatably driven by a hydraulic motor 37 provided on the base 28, thereby being connected to the sliding member 32 and the sliding member 32 by a pin 33. The bolster B moves left and right. The positioning at the one moving end of the bolster B, that is, the positioning at the press position, is performed by bringing the sliding member 32 into contact with the stopper 38 provided on the bearing member 34. The outer rail 29 is connected to an extension rail 40 provided on a support 39 of the reversing device R, and the bolster B guided by the slider 30 to the outer rail 29 and the extension rail 40 has the other moving end, That is, when reaching the work transfer position, the sliding member 32 is provided with a stopper provided on the bearing member 35.
It is positioned in contact with 41.

Next, based on FIG. 11 and FIG.
Will be described in detail. Clamping device C is a press machine PM
The clamp cylinder 42 is attached to the base 29 of the
A slide block 45 that slides in the left-right direction along two guide rods 44 fixed via 43 is connected.
A plate-like arm 47 slidably supported on the slide block 45 via two guide pins 46 is connected to a connecting cylinder 48 provided on the slide block 45 via a rod 49, and is arranged in the front-rear direction, It moves in a direction perpendicular to the direction of expansion and contraction of the clamp cylinder. On the other hand, two guide blocks 50 are provided on the lower surface of the bolster B supported on the substrate 28.
The upper and lower guide rods 51, which are slidably guided by the guide block 50, have cam members 52, 53 fixed to both ends, respectively. On both cam members 52 and 53, the cam grooves 52 ₁ bent in a polygonal line shape, 53 ₁ are formed, two right and left elevation axis passing through the bolster B liftably
The roller 55 provided at the lower end of 54 is engaged with the cam grooves 52 _1, 53 _1. Wherein the upper end of the elevating shaft 54, the plate fitting clamp pin 56 from above the clamp hole 2 ₁ formed in the lower flange 2 of P is fixed downward. Then, on one of the cam member 52, the knock pin 57 fixed to the arm 47 is fittable knock holes 52 ₂ are formed. And Thus, coupling fitted to knock pin 57 to the knock holes 52 ₂ by extending the cylinder 48 integrally connected to the arm 47 and the cam member 52, when the clamp cylinder 42 and a retracted position in this state, the slide The pair of cam members 52, 53 move to the left in the drawing via the block 45, and their cam grooves 52 ₁ , 5
3 ₁ lifting shaft 54 and the roller 55 into engagement with the upper end is increased clamping pin 56 is disengaged from the clamp hole 2 _1. As a result, the plate P is in an unclamped state with respect to the bolster B. On the other hand, the cam cylinder 5 is extended by extending the clamp cylinder 42.
When the rollers 55 are moved to the right in the figure, the rollers 55
_The lower end is reached by passing through the inclined portions ₁ and 531, and the elevating shaft 54 is lowered. Thus, the clamp pin 56 plate P is fitted to the clamp hole 2 ₁ is firmly clamped to the bolster B. After the plate P is clamped in this manner, the connecting cylinder 48 is contracted, and the knock pin 57 is inserted into the knock hole.
If you ask detached from 52 ₂ bolster B is in a state free to move toward the workpiece delivery position.

Next, the structure of the reversing device R and the discharging device DS will be described in detail with reference to FIGS. The reversing device R provided at the work transfer position includes two rotating shafts 63 and 64 coaxially supported by ball bearings 61 and 62 on bearing members 59 and 60 provided above the pair of bases 58, The support table 39 which can be connected to the base 28 of the press machine PM via a bracket 65 is fixed to opposite ends of the two rotating shafts 63 and 64. An extension rail 40 connectable to the outer rail 29 laid on the upper surface of the base 28 is laid on the upper surface of the support base 39, and the extension rail 40 has an L-shaped cross section provided on the lower surface of the bolster B. Slider 30 is slidably engaged.

Two ball bearings in one bearing member 60
A pinion 67 that meshes with a rack bar 66 that slides inside the bearing member 60 is fixed to the rotating shaft 64 supported by 62. The rack bar 66 is connected to and driven by a reversing cylinder 68 attached to the end surface of the bearing member 60, and rotates the pinion 67 to move the support base 39 to the rotation shafts 63, 6.
Turn around 4 times.

Discharge device DS is provided with a pair of side plates 69 erected on the floor, consisting of a bottom wall 71 ₁ and a pair of side walls ₇₁₂ which is fixed to the balance weight 70 at one end in between the side plate 69 a U-shaped cross section A chute 71 is movably supported. Both sides of chute 71
Rollers 74 and 75 having flanges 74 ₁ and 75 ₁ are fixed to both ends of two connecting shafts 72 and 73 that penetrate through 71 ₂ . A roller 74 provided on one of the connecting shafts 72 is engaged with a guide groove 76 formed of a horizontal portion 76 ₁ and an inclined portion 76 ₂ formed on the inner surface of the side plate 69, and is formed slightly shorter than the connecting shaft 72. A roller 75 provided on the other connecting shaft 73 is engaged with a guide groove 79 formed by an inner plate 78 fixed to the inner surface of the side plate 69 via a spacer 77. The guide groove 79 includes a horizontal portion 76 ₁ and the inclined portion ₇₆₂ inclined portion 79 ₂ and the horizontal portion 79 ₁ parallel to the guide groove 76, the stopper 80 is the tip of the inclined portion 79 ₂
Are formed. The shafts 81 provided at both ends of the support base 39 and the connection shaft 72 are connected to each other by a connection member 84 having joints 82 and 83 at both ends.
And the tilting mechanism 8 of the chute 71 by the guide grooves 76 and 79
6 is configured. Thus, when the support base 39 is in the inverted position shown in FIG. 13, the chute 71 pulled by the connecting member 84
By engaging the roller 74 with the horizontal portion 76 ₁ of the guide groove 76 and engaging the roller 75 with the horizontal portion 79 of the guide groove 79,
The lower part of the support 39 in the inverted state assumes a horizontal posture. When the support base 39 is in the horizontal posture shown in FIG. 17,
Chute 71 which is pressed by the connecting member 84, the roller 75 is engaged with the roller 74 on the inclined portion 76 ₂ of the guide groove 76
Was in contact with the inclined portion 79 ₂ end of the stopper 80 of the guide groove 79, the posture was tilted in the upper part of the conveying device T consisting scrap carriage 85.

Next, the operation of the embodiment of the present invention having the above-described configuration will be described.

When a work to which burrs adhere is carried in from the carry-in conveyor Ci, the type of the work is determined by the detector S provided at the end of the work. The first drive cylinder 19 and the second drive cylinder 21 of the die changing device DC are based on the output signal of the detector S.
When is selectively driven to expand and contract, the traveling frame 16 moves in the front-rear direction along the rail 12. Then, the three plates P connected to the traveling frame 16 via the pair of front and rear traveling bodies 17 move along the transfer path 9 and the plate on which the mold D corresponding to the detected work is placed. P stops on the bolster B of the press machine PM. Subsequently, when the positioning cylinder 24 is extended, the positioning pins 27 are fitted into the positioning holes 3 of the plate P, and the plate P is precisely positioned at the press position on the bolster.

Then, the knock pin 57 extends a connection cylinder 48 of the clamp device C is engaged with the knock hole 52 ₂ of the cam member 52, both cam members by extending the clamp cylinder 42 52,5
3 drives the elevating shaft 54 which engages with the cam grooves 52 ₁ , 53 _1.
Clamp holes 2 ₁ There clamp pin 56 descends plate P
, Whereby the plate P is clamped on the bolster B. Next, the hydraulic ram OR is extended to lower the die plate DP along the guide post GS, and the gripper G
Then, the upper mold Du of the mold is gripped and separated from the lower mold Dl. Then, after disconnecting the base 28 and bolster B by disengaging the knock pin 57 by contracting the connecting cylinder 48 from the knock hole 52 _2, sliding member 32 by driving the hydraulic motor 37
Is moved along the inner rail 31, and the bolster B connected to the sliding member 32 via the pin 33 is moved together with the plate P to the work transfer position on the support table 39 of the reversing device R. At this time, the hooks 4 and 5 provided on the plate P on the bolster B and the hooks 4 and 5 provided on the adjacent plate P or the traveling body 17 are automatically disengaged.
The slider 30 provided on the bottom surface of the base moves from on the outer rail 29 of the base 28 onto the extension rail 40 of the support base 39.

When the bolster B reaches the work transfer position, the work on the carry-in conveyor Ci is moved to the plate P by a moving means (not shown).
When the work is quickly worn on the upper lower mold Dl, the hydraulic motor 37 is reversed to return the bolster B to the pressing position on the base 28 again, and the upper mold Du is lowered by the hydraulic ram OR to lower the work.
Press between Dl to cut and remove burrs. Then the upper mold
Du is again moved to the workpiece delivery position bolster B with the raising again to discharge the workpiece removing the burrs with moving means (not shown) on the discharge conveyor C _0.

Next, when the reversing cylinder 68 of the reversing device R is extended to rotate the pinion 67, the support base 39 supporting the bolster B is reversed around the rotation shafts 63 and 64 to the position shown in FIG.
The burrs attached to the upper plate P and the lower mold Dl are dropped on a chute 71 located below and in a horizontal posture. When the bolster B is inverted together with the support 39, the bolster B
The pin 33 projecting from the lower surface of the leaves from the recess 32 _first sliding member 32. Subsequently, the reversing cylinder 68 is contracted to
Is returned to the horizontal position, the connecting member 84
The chute 71 connected via the rollers 74, 75
Is guided by the guide grooves 76 and 79 provided in the side plate 69 and tilts while ascending to the position shown in FIG. 13, and discharges burrs to the scrap truck 85 at the carry-out position T located below.

Next, if the work conveyed by the carry-in conveyor Ci is of the same type as the previous work, the work is completely transferred to the lower mold Dl on the plate P at the delivery position after the discharge of the burrs is completed. If the type of work is different, the bolster B returns to the press position together with the plate P, and the dies are exchanged with a new die D by the die changing device DC.

As described above, the embodiments of the present invention have been described in detail. However, the present invention is not limited to the above embodiments, and various small design changes can be made without departing from the present invention described in the claims. It is possible.

For example, the number of plates to be connected is not limited to three but may be any number. Instead of providing upward and downward hooks at the front and rear ends of each plate, two upward or downward hooks may be provided for each plate.

C. Effects of the Invention As described above, according to the first feature of the present invention, a plurality of plates on which a mold is placed are connected in series in the front-rear direction by hooks, and these plates are connected before and after a bolster of a press machine. Because it reciprocates in the forward and backward direction on the extending transfer path,
A plate on which a desired mold is placed can be quickly positioned on the bolster. In addition, since each plate is connected to the adjacent plate or traveling body so as to be separable by a hook, the work of reassembling the plate can be easily performed.

According to the second feature of the present invention, the plate can be precisely positioned on the bolster by the positioning means.

Further, according to the third aspect of the present invention, when the bolster is moved in the left-right direction for the transfer of the work, the hook for connecting the plate supported on the bolster to the adjacent plate or the traveling body is automatically turned on. And the plate can be moved in the left-right direction integrally with the bolster.

[Brief description of the drawings]

1 is an overall plan view showing one embodiment of the present invention, FIG. 2 is a view taken in the direction of the arrow II in FIG. 1, FIG. 3 is a view taken in the direction of the arrow III in FIG. 1, and FIG. , (B) are a front view and a side view of the plate, FIG. 5 is a perspective view of the plate in a connected state, FIG. 6 is an enlarged plan view of a main part of FIG. Is a sectional view taken along the line VII-VII in FIG. 6, and FIG.
FIG. 9 is an enlarged sectional view taken along line VIII-VIII of FIG. 9, FIG. 9 is an enlarged plan view of a main part of FIG. 6, showing a bolster moving mechanism, and FIG.
-X-ray sectional view, Fig. 11 shows the clamping device, Fig. 9 XI
FIG. 12 is a sectional view taken along the line XXI--XII of FIG.
13 is an enlarged side view of a main part of FIG. 3 showing a reversing device and a discharging device, FIG. 14 is a view taken in the direction of the arrow XIV in FIG. 13, and FIG.
FIG. 4 is a view taken in the direction of the arrow XV, FIG. 16 is a sectional view taken along the line XVI-XVI of FIG. 14, and FIG. 17 is a side view similar to FIG. 4,5… hook, 9… transfer path, 17… running body, 19,21…
... Driving cylinder (drive source), 24 ... Positioning cylinder (Positioning means), B ... Bolster, D ... Mold, P ... Plate, PM ...
Press machine

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) B22D 31/00 B21D 37/04 B29C 37/02 B21D 28/00

Claims (3)

(57) [Claims] 1. A press machine (PM) which selects a desired one from a plurality of plates (P) on which a mold (D) is mounted on an upper surface.
A mold changing device for supplying a bolster (B) of the above with a hook (4, 5) having a U-shaped cross section at the front end and the rear end of each plate (P) facing upward or downward. P) are connected inseparably in the front-rear direction and separable in the left-right direction, and the connected plates (P) are movably supported along a transfer path (9) extending back and forth of the bolster (B). A traveling body (17) connected to a driving source (19, 21) and reciprocally driven in parallel with the transfer path (9).
Is connected to the frontmost and rearmost plates (P) via the hooks (4, 5). 2. A positioning means (24) for stopping a plate (P) on which a desired mold (D) is mounted on the bolster (B) is provided in the transfer path (9). Do
A mold changing device according to claim 1. 3. A bolster (B) to which a plate (P) on which a desired mold (D) is mounted is fixedly movable on a bolster (B) between a press position and a work transfer position in the left-right direction. The mold exchanging device according to claim.