JP3509810B2 - Rotary cam drive of negative angle forming die - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to forming a thin metal plate.
The present invention relates to a rotating cam drive device of a negative angle forming die. here,
The negative angle mold is located in the lower mold from the linear descending locus of the upper mold.
Refers to the molding that has entered. [0002] 2. Description of the Related Art A work of a thin metal plate is moved in a linear direction of an upper die.
Negative angle molding that enters the lower mold from the descending locus
It is performed using an id cam. [0003] Conventional work for forming a work of a thin metal plate
Place the work on the lower die and lower the upper die vertically downward.
Drive the lower passive cam with the upper
Work from the horizontal direction, the processing is completed and the upper die rises
And the operating cam was retracted by the spring. [0004] In this case, the work slides from the lateral side outward.
The forming part of the passive cam that forms the workpiece
Although it is formed in the same integral shape as the
The molding part of the lower mold that is placed
Split the lower mold entry as it must be removed
Back or remove the back of the entry
The workpiece can be taken out by moving the workpiece forward
Must be capable. Slight intrusion
This is not a problem, but the penetration is large
If the work or the work has an elongated frame-shaped cross section, for example,
Like a metal sheet metal front pillar outer
For parts, the groove width of the work is narrow,
Splitting or removing the mold part will result in passive cam formation.
Not only can the shape not be clearly formed with the shape, but also the lower mold
The strength was also insufficient, and it was impossible to perform the penetration molding. [0005] In addition, the product is twisted or distorted, and the product is corrected.
It may be necessary to perform
Dar, roof, hood, trunk lid, door panel
Of the car, such as the front and outer pillars
Components have three-dimensional curved surfaces and curves,
Positive is practically impossible. A place for assembling metal sheets for automobiles
If the product is twisted or distorted, it may be connected to other parts.
To provide high-quality metal sheet metal structures for automobiles.
And maintain the specified product accuracy of thin metal sheet products
I couldn't. In order to solve the above-mentioned problem, an upper straight line
The molded part that has entered the lower mold from the
After molding, the molded workpiece can be removed from the lower mold
The following configuration has been proposed to rotate the rotary cam backward
Was. That is, as shown in FIGS.
Lower die 1 for placing work W made of a thin metal plate on supporting portion 101
02, and descends linearly with respect to the lower
Consists of an upper die 103 that forms the work W by abutting against the workpiece W
And has a groove 104 that is opened in the outer peripheral surface and is engraved in the axial direction.
And the upper die 103 is attached to the edge of the groove 104 near the support portion 101.
Forming a penetrating molded part 105 penetrating from the locus,
A rotary cam 106 rotatably provided on the mold 102,
Having a shaping portion 107 and facing the rotating cam 106.
Cam 108 slidably provided on the upper die 103
And the state where the work W can be taken out from the lower mold 102 after molding.
The rotary cam 106 is retracted up to
Supports the lower mold 102 consisting of an air cylinder 109
The workpiece W placed on the section 101 is inserted into the rotating cam 106.
Entrance of the slide forming part 105 and the slide cam 108
The slide cam 108 slides on the shaped part 107 to move the work W
After the molding, the rotating cam is
106 is rotated back, and the formed workpiece W is
This was a negative angle mold that could be more easily taken out. The operation of the negative angle forming die will be described. First, as shown in FIG.
It is located at the top dead center, at which time the support 1 of the lower mold 102
The work W is placed on the work 01. At this time, the rotating cam 106
Is in a retracted position by the air cylinder 109. Next, as shown in FIG.
6 is in a molding position by the air cylinder 109.
The upper die 103 starts to descend, and the support portion 101 of the lower die 102
The pad 110 presses the placed work W. Subsequently, the upper mold 103 is lowered, and as shown in FIG.
As shown, the slide cam 108
Slide cam 1 without interfering with the
08 contacts the rotating plate 111. When the upper mold 103 continues to descend, the outside of the mold
The slide cam 108 urged in the lateral direction has a coil
By the action of the cam against the urging force of the spring 112,
To the left in the horizontal direction, and the state shown in FIG.
The slide forming cam 105 and the slide molding 1
08 and the penetration forming part 107 to form the workpiece W
Do the shape.This is the state of bottom dead center. After the engraving, as shown in FIG.
The upper mold 103 starts to rise. The slide cam 108 is a coil spring 1
12 urges the mold outward.
Moves to the right and interferes with the work W
Rise without. On the other hand, the slide cam 108 rises and rotates.
The cam 106 is moved by an air cylinder 109 in FIG.
Rotate to the right, lower mold 10 of work W
When the workpiece W is taken out of the rotary cam 106,
It can be taken out without interfering with the recess forming section 105.Figure
Reference numeral 16 denotes a state at the top dead center. The air cylinder, as described above,
After molding, rotate to remove the molded workpiece from the lower mold
This is necessary in order to return the cam to rotation. The rotary cam drive of the present negative angle forming dieAn example of
Will be described with reference to FIGS. 17, 18, 19 and 20.
You. A rotating cam 5 is rotatably arranged on the lower mold 1,
The cylinder 51 for returning the rotating cam 5 is arranged in the lower mold 1
Then, a cam follower arm 52 is attached to the rotating cam 5,
The upper die 3 has a plate-shaped door for controlling the cam follower arm 52.
A river 53 is provided. At both ends of the shaft-like rotary cam 5,
A shaft in which a holding shaft 11 is protruded and a cylindrical metal 12 is fixed.
The support shaft 11 is rotatably fitted in the metal 12 of the receiver 13.
To rotate the rotary cam 5. Substrate 14 of support shaft 11
To the shaft end of the rotating cam 5FifteenFixed by the support shaft
The bearing 13 for fitting 11 is connected to the lower mold 1 by bolts 16.
Fix it. The tip 11a of the support shaft 11 is shaped like a square pole.
And reliably transmit the output of the air cylinder 51 to the rotary cam 5.
To be able to reach. The cam follower arm 52 is located on both sides from the disk.
At the center of the support shaft 11 at the center.
The end 11a is clamped and connected with the bolt 54. Mosquito
A cam follower 55 is attached to one end of the mu follower arm 52.
Is rotatably provided, and the nut 56 is screwed on to prevent the nut from falling off.
You. At the other end of the cam follower arm 52, a syringe
The connecting member 58 is connected to the tip of the piston rod 57 of the
And connected by a pin 59. End of piston rod 57
The threaded rod portion 67 at the end is inserted into the connecting member 58,
The nut 68 screwed into the portion 67 is tightened to connect the connecting member 5.
8 and the tip of the piston rod 57. This na
Cam follower arm depending on the amount of tightening
The rotation start and rotation end positions of the
It is difficult to arrange the cam 5 accurately and it is necessary to go into the molding.
And cannot process high quality workpieces.
You. The cylinder 51 is mounted on the lower mold 1 via the bracket 60.
Attach with the bolt 61. Normally, the piston rod 57 of the cylinder 51
Is extended, the rotary cam 5 holds the molding position, and the upper die 3
Is lowered to complete the injection molding.
When the stone rod 57 contracts, the rotary cam 5 rotates and retracts.
Then, the work can be taken out upward. Should the cylinder 51 fail, the upper die
3 driver 53 and lower mold 1 cam follower arm 52
And the rotary cam 5 is brought into the molding position or rotated backward.
The posture is such that the work can be taken out upward. That is, the cam follower arm 5 of the upper die 3
A plate-shaped driver 53 is provided at the two opposing locations.
A cam follower arm 52 is provided on the cam surface 62 of the driver 53.
The rotation of the rotary cam 5 is controlled by bringing the cam follower 55
Let me control. The cam surface 62 is in the downward stroke of the press machine
At which position the rotary cam 5 is turned,
Is determined in consideration of whether to maintain a predetermined molding posture.
The rotating cam 5 is rotated by the inclined portion 62a of the cam surface 62,
The vertical position 62b of the cam surface 62 holds the molding posture. The driver 53 is lifted by bolts 63
Fix to mold 3. The cylinder 51 is lifted by the upper die 3 and
The cam follower 55 of the follower arm 52 is the driver 53
When the rotating cam 5 comes into contact with the cam surface 62 of the
Is restored. FIG. 18 shows a state where the upper die 3 is at the top dead center.
19 is a state of bottom dead center. When the upper die 3 descends from the state of the top dead center,
The inclined surface 62 of the cam surface 62 of the driver 53 of the upper die 3
a is the cam follower 5 of the cam follower arm 52 of the lower die 1
5, the rotating cam 5 rotates and the cam follower 55
When reaching the vertical portion 62b of the cam surface 62, the rotating cam 5 is formed.
Maintain shape posture. Completion of work entry molding
Then, the upper mold 3 rises. Hold the cam follower arm 52
Nothing is bundled, and the rotating cam 5
Returns. FIG. 20 is a plan view of FIG. [0030] SUMMARY OF THE INVENTION RotationcamThe cylinder of
Rotated by extension / contraction of piston rodNegative angle molding
Type rotary cam driveIn the moving device, the rotationcamFrom both ends
Protrude the support shaft, hold the support shaft and rotatecam
Is provided rotatably, and the center of the cam follower arm is
Part of the cam follower arm and the cylinder
Screw rod part at the tip of piston rod with ston rod
Is inserted into the connecting member connected to one end of the cam follower arm.
And tighten the nut screwed into the threaded rod to connect
The material was connected to the end of the piston rod. However, depending on the amount of tightening of the nut,
Rotation start end position and rotation end position of cam follower arm
The rotation cam is positioned accurately,
Can not be performed, and in this state the
In some cases, high-quality workpieces could not be machined. [0032] SUMMARY OF THE INVENTION Accordingly, the present invention provides
In consideration of the circumstancescamThe cylinder piston rod
Rotate by extension / contractionRotating cam drive of negative angle forming moldMovement
In the device, the starting position of the rotation of the cam follower arm,
Move end position accuratelyTurnPosition the cam accurately
To perform high-quality work
So thatPlace a thin metal work on the support
The lower mold and the lower mold are lowered in a linear direction to impinge on the work.
And the upper die that forms the workpiece together.
Forming a penetrating part into the edge from the path of the upper die
And a rotary cam rotatably provided on the lower die,
Part, and slidably provided facing the rotary cam.
Workpieces can be removed from the lower mold after molding with slide cam
Automatically mounted on the lower mold to rotate and retract the rotating cam to the state
It consists of a return tool, and the work placed on the lower mold support
Entrance forming part of rotary cam and entrance of slide cam
In the shape section, the slide cam slides to form the workpiece,
After that, the rotating cam is rotated back by the automatic return tool,
Into a negative angle mold that allows the workpiece to be removed from the lower mold.
The support shafts from both ends of the rotating cam.
The rotating cam is rotatably mounted with the support shaft held in the lower mold.
And fix the center of the cam follower arm to the support shaft.
One end of the mu-follower arm and the piston of the cylinder
The guide plate is interposed between the
One side of the plate is orthogonal to the stroke direction of the piston rod
To rotate the cam follower arm in the direction
Engraved guide groove, and cam follower arm
The cam follower at the tip of the
An inner groove is carved and the guide plate support row fixed to the lower die
Negative angle forming die rotating cam with
It was a driving device. [0033] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described in detail below based on a typical embodiment. FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG.
7, 8, 9 and 10 show an embodiment of the present invention.
The same parts as those in FIGS. 17 to 20 are denoted by the same reference numerals. The piston rod 69 of the cylinder 51 and the cam
A guide plate 71 is interposed between the follower arm 70 and the follower arm 70.
Let A cam follower is provided in the guide groove 72 of the guide plate 71.
The cam follower 73 of the arm 70 is fitted. Is the cam follower arm 70 a central disk part?
Protrude at right angles from each other and consist of two members.
A rotatable mu follower 55 is provided.
The follower 73 is fitted into the guide groove 72. Guide plate 71Back ofThe piston rod
69 in the direction orthogonal to the stroke direction.
Guide groove 7 engraved to rotate lower arm 73
2 is provided. The guide groove 72 is used to strike the piston rod 69.
It is separated in the direction perpendicular to the roak direction (see
The guide grooves 72 are engraved at upper and lower intervals.
To pull the follower arm 73 and rotate the rotating cam 5
It is. The cam follower 73 moves smoothly in the guide groove 72
Yes, slightly longer than the stroke of piston rod 69
Set it. The guide groove 72 is inclined with the horizontal groove 72a.
The groove 72b is formed. The piston rod 69 of the cylinder 51 and the guy
The connection with the dovetail plate 71 is made by threading the tip of the piston rod 69.
Screw it into the guide plate 71 and fix it as shown in FIGS.
The plate 74 stops the rotation of the piston rod 69. FIG.
As shown in FIG. 4 and FIG.
Both sides are deleted between the distal end 69a and the large-diameter proximal end 69b.
A fixed plate 7 is provided on both flat surfaces 76a.
4 and the fixing plate 74 is bolted to the fixing plate 74.
The guide plate 71 is screwed. The guide plate 71 is provided as shown in FIGS.
The above-described guide groove 72 is formed on the back side of FIGS.
And insert the cam follower 73 of the cam follower arm 70
However, the piston rod 69 of the cylinder 51 is located on the front side.
Horizontal guide groove to transmit the expansion and contraction of
75 ・86And guides shown in FIGS. 8, 9 and 10
Roller 78, rollers 79 and 80 of plate support 77
Horizontal guide groove 75, horizontal guide groove86To fit. This
Guide plate support 77 is fixed to the lower mold 1 by bolts 81.
Set. FIG. 1 shows a state where the upper die 3 is at the top dead center, and FIG.
It is in the state of dead center. FIG. 3 shows a state in which the upper mold 3 of FIG. 2 is removed.
It is a top view. When the upper mold 3 descends from the state of the top dead center,
The inclined surface 62 of the cam surface 62 of the driver 53 of the upper die 3
a cam follower 5 of the cam follower arm 70 of the lower die 1
5, the rotating cam 5 rotates and the cam follower 55
When reaching the vertical portion 62b of the cam surface 62, the rotating cam is formed.
Hold posture. Work entry molding is completed
Then, the upper mold 3 rises. Constrain cam follower arm 70
The rotating cam 5 is moved by the cylinder 51.
To return. The cam groove in the guide groove 72 of the guide plate 71
The cam follower 73 of the lower arm 70 is located at the top dead center of FIG.
In the state, it is located in the inclined groove 72b. Upper mold 3 descends
The cam follower 73 follows from the oblique groove 72b to the linear groove 7
Move to 2a. The cam follower 73 is in the straight groove 72a.
When positioned, the cam follower 55 is vertical to the driver 53
The rotating cam 5 is positioned at the portion 62b and is in the molding posture.
You. Tighten the piston rod of the cylinder with the screw
When connecting by fitting, the amount of tightening of the screw part may be slightly
The rotation start and end positions of the rotary cam can be accurately determined.
The rotation cam cannot be positioned accurately,
In that state, we will perform engraving and molding,
The work could not be formed. In the present invention,
The piston stroke of the Linda 51 is the same as the cam follower 73.
The rotation of the rotary cam is started by fitting the guide groove 72.
End and end of rotation.
Entangled molding process. [0044] According to the present invention, as described above,Metal sheet
A lower die on which the work is placed on the support, and a straight line
Upper die that descends in the direction and abuts the workpiece to form the workpiece
And enters the edge near the support from the locus of the upper die
The lower part is formed rotatably by forming
A rotating cam, and a recessed portion;
A slide cam slidably provided facing the
Rotate the rotary cam back until the workpiece can be removed from the lower mold
The automatic lowering tool provided on the lower mold
The work placed on the holding section is
The slide cam slides at the slide cam entry molding part
To form the work, and after forming, turn the rotary
Rotate the robot back and remove the molded workpiece from the lower mold
From the opposite ends of the rotating cam
Extend the support shafts and hold the support shafts in the lower mold
A rotatable cam is provided rotatably, and a cam follower arm is mounted on the support shaft.
The center of the cam is fixed, and one end of the cam follower arm and the lower die
Guide plate between the cylinder and the piston rod
Interposed and connected, one side of the guide plate has a piston rod
Cam follower separated in the direction perpendicular to the stroke direction
Engrave a guide groove to rotate the arm, and
Insert the cam follower at the tip of the cam follower arm into the groove,
A horizontal guide groove is engraved on the other surface of the guide plate and fixed to the lower mold
Do not fit the rollers of the guide plate support into the horizontal guide grooves.
Because it is a negative angle forming rotary cam drive device,rotationcam
Is rotated by the extension and contraction of the piston rod of the cylinder.
RotatecamIn the drive unit, the cam follower arm
Precisely determine the rotation start end position and the rotation end position,
Positioning is performed accurately and is performed for high-quality work.
Can be processed. Also, rotate the cylinder
When the cylinder is directly connected, the power of the cylinder is
Although it is transmitted in an impact manner, the present invention uses a cylinder and a rotating cam.
When the cylinder is connected with a guide groove between
The impact movement of the piston rod is absorbed by the guide groove and
The impact of the cylinder is not applied to the rolling cam.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a specific example of a negative-angle forming rotary cam drive device of the present invention, in which an upper die is at a top dead center. FIG. 2 is a side view of the upper die of FIG. 1 in a state of a bottom dead center. FIG. 3 is a plan view showing a state in which an upper mold of FIG. 2 is removed. FIG. 4 is a front view of a fixing plate according to the present invention. FIG. 5 is a side view of the fixing plate according to the present invention. FIG. 6 is a front view of the guide plate of the present invention. FIG. 7 is a side view of the guide plate of the present invention. FIG. 8 is a front view of the guide plate support according to the present invention. FIG. 9 is a side view of the guide plate support according to the present invention. FIG. 10 is a plan view of a guide plate support according to the present invention. FIG. 11 is a longitudinal sectional view showing a state in which the upper mold of the conventional negative angle forming die for performing the insert forming is at the top dead center. FIG. 12 is a vertical cross-sectional view of a conventional negative angle forming die in a state where a rotary cam is in a forming position by an air cylinder, an upper die is lowered, and a work is pressed by a pad. FIG. 13 is a longitudinal sectional view showing a state in which an upper mold of a conventional negative angle forming mold descends, comes into contact with a lower mold, and starts to contact a work. FIG. 14 is a longitudinal sectional view showing a state in which the upper mold of the conventional negative angle forming die is at a bottom dead center. FIG. 15 is a vertical cross-sectional view of a conventional negative-angle forming mold in which the penetration forming process has been completed and the upper mold has begun to ascend. FIG. 16 is a vertical cross-sectional view showing a state in which a conventional negative angle forming die is inserted and formed, and the upper die further rises to a state of top dead center. FIG. 17 is a schematic diagram of a rotary cam driving device of a negative angle forming die. FIG. 18 is a side view of a specific example of a negative-angle forming rotary cam drive device in which the upper die is at the top dead center. FIG. 19 is a side view of the state in which the upper die of FIG. 18 is at the bottom dead center. FIG. 20 is a plan view of FIG. 19; [Description of Signs] W ... Work 1 ... Lower mold 3 ... Upper mold 5 ... Rotating cam 11 ... Support shaft 11a ... Tip 70 ... Cam follower arm 51 ... Cylinder 69 ... Piston rod 53 ... Driver 71 ... Guide plate 72 ... Guide groove 73 cam followers 75 and 86 horizontal guide grooves 77 guide plate supports 78 79 and 80 rollers

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 5/01 B21D 19/08 B21D 37/08 F15B 15/14

Claims (1)

(57) [Claims] (1) A work made of a thin metal plate is placed on a support.
The lower mold and the lower mold are lowered in a linear direction to impinge on the work.
And the upper die that forms the workpiece together.
Forming a penetrating part into the edge from the path of the upper die
And a rotary cam rotatably provided on the lower die,
Part, and slidably provided facing the rotary cam.
Slide cam and rotating cam until the workpiece can be removed from the lower mold after molding
The automatic return device provided on the lower die
The work placed on the lower mold support
Slide and slide cam
The docam slides to form the work, and after the forming, the automatic return tool
Rotate the rotating cam back and move the formed workpiece to the lower mold
In the negative angle mold that can be
Project the support shaft from both ends of the
The rotating cam is rotatably provided by holding the cam on the support shaft.
The center part of the follower arm is fixed, and one end of the cam follower arm and the pin of the cylinder
Connect the guide plate between the stone rod and the
On one side of the id plate, the stroke direction of the piston rod is
Rotate the cam follower arm in the intersecting direction
Engraved flat guide groove, and cam follower
Fit the cam follower at the end of the
A guide groove is engraved and the guide plate support
Roller of a negative angle forming die with a roller fitted into the horizontal guide groove.
Drive.