JP3193252B2 - Cam type small transfer press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small cam type transfer press machine, and more particularly, to a small cam type compact transfer press machine for a small work having a relatively short drawing depth. It is.

[0002]

2. Description of the Related Art Conventionally, cam type transfer press machines have been
As shown in the front view of FIG. 10 and the side view of FIG. 11, when the drive motor 102 rotates the camshaft 101, an intermediate shaft having a flywheel 103 is provided and a small gear 104
, And usually rotated through a large gear 105.

The cam shaft 101 has left and right drive cams 101A and 101B of the same shape, and two upper and lower follower rollers 107A, 107B, 108A,
The ram (slide) 106 was moved up and down via 108B. Also, the frame 1 is used to move the ram 106 up and down.
As shown in FIG. 12, the guide surface provided at 07 is generally an ant-shaped guide surface 107a, 107b, and the accuracy is improved by a sliding operation.

Further, as shown in FIG. 13, a die set used in a transfer press machine has a die-set lower stand 108 and a die-set upper stand 109 which are usually of an integrated structure in which dies or punches of all processes are incorporated. The upper surface of the bolster and the upper stage 109 of the die set are attached to the lower surface of the slide, respectively, and setup operations such as centering and stroke adjustment are performed.

[0005] Further, as shown in FIG. 14, a transfer mechanism for sequentially transferring a work (molded product) from a first process to another process is performed by an opening / closing tool 110 for each process.
09, the work gripping claws 112A, 112
B is a horizontally movable transfer slide frame 111,
The work-holding claws 112A and 112B are opened and closed by the upper and lower movements of the die-set upper stand 109 by being inserted and opened in the openable / closed state by a spring 113 at all times.

[0006]

A cam-type transfer press having the structure described in the prior art is a flywheel 1
By rotating the camshaft 101 via an intermediate shaft having
An average pressing force is obtained for an intermittent load at the time of machining by utilizing the flywheel effect by rotating the flywheel 103 at a high speed on the intermediate shaft on the high speed side, but the load is relatively small. In the case of a small transfer press machine dedicated to small workpieces, there is a problem that the structure is complicated and the cost is high.

The driving cams 10 are provided on both sides of the camshaft 101.
The reason for having 1A and 101B is also conspicuous that a small machine, which is necessary for a large machine but has a small load, increases the cost because of the complicated structure. Also, ram 1
The method of using the dovetail-shaped sliding surface structure for the guide between the 06 and the frame 107 has a problem that the sliding work at the time of mechanical assembly is difficult and the cost is high.

Further, the die set described in the prior art is
The setup must be performed with the lower die set base 108 attached to the upper surface of the bolster and the upper die set base 109 mounted on the slide lower surface. Have.

The method of providing the opening / closing tool 110 for each step and individually opening and closing the work gripping claws is necessary when the length of the work differs for each step by deep drawing or the like. In the case of a small work having a relatively short depth, the periphery of the die set becomes complicated, and the opening and closing timing must be adjusted for each process, which is troublesome.

The present invention has been made in view of these problems of the prior art, and an object of the present invention is to reexamine each of the problems without being restricted to the conventional structure, thereby providing a dedicated machine for small work. It is an object of the present invention to provide a simple and inexpensive small cam type transfer press having sufficient capacity and ease of use.

[0011]

In order to achieve the above object, a small cam type transfer press machine according to the present invention is provided.
A plurality of guide posts vertically provided on a frame of a press machine, a cam shaft provided rotatably at an upper portion of the frame and having a driving cam at a center portion and a flywheel at an end portion; and the cam shaft. An upper slide and a lower slide that are rotatably provided along the guide post and that are rotatable follower rollers that are in contact with the drive cam, and that are connected to each other by a connecting member. A drive motor that directly drives the camshaft via a rotation transmitting member, and a position that is fixed on the bolster of the frame.
Guides fixed on both ends of the work plate in the direction of the center line of the workpiece feed
Through the die set along the guide of the workpiece feed center line
A transfer provided so that it can move horizontally so that it can pass
A ride frame and the transfer slide frame.
Provided so that it can move horizontally in a direction perpendicular to the center line
Two gripping claw support rods and the two gripping claw support rods
At the same pitch and symmetrical with respect to the workpiece feed center line.
A plurality of sets of workpiece gripping claws,
The two gripping claw support bars so that the gripping claws are always closed.
A plurality of springs biasing inward each other, and
The front of the fixed work guide center line perpendicular to the center
Provided so that it can move horizontally symmetrically with respect to the work feed center line
The end faces opposing each other are open upward and form a slope
The two sets of open / close plates and the set of open / close plates are
And a spring that urges itself to close,
It is fixed downward at the position corresponding to the opening and closing plate,
Opening / closing tool that opens the opening / closing plate by contacting the inclined surface when descending
And pivotally supported by the gripping claw support rod to abut the opening / closing plate.
And a roller for opening and closing the work gripping claw.
The forcible opening and closing of the gripping claws all at once by the vertical movement of the id
It has a spa mechanism.

[0012]

[0013] A multiple unit vertically provided on the frame of the press machine.
Several guide posts and the upper part of the frame are turned horizontally.
It is rotatably provided with a drive cam at the center and a flywheel at the end.
A cam shaft having a
The drive cam is provided movably along the guide post.
The rotatable follower rollers that come in contact with
The upper slide is connected to the upper and lower
And the lower slide and the camshaft via a rotation transmitting member.
And a drive motor that drives directly
A fixed positioning plate and detachably mounted on the positioning plate
A plurality of die set lower stages for each process to be performed;
Vertical guides on each of the
Lower slide provided movably along the dover
On the die set for each process that is detachably engaged with the lower surface
A table and a spring for constantly urging the upper part of the die set upward
And the die set lower base at a predetermined position of the positioning plate.
Positioning means for mounting and workpiece feeding on positioning plate
Work center of guide table fixed at both ends in the center line direction
Horizontal to penetrate the die set with linear guidance
A transfer slide frame movably provided;
Center the workpiece feed center line in the transfer slide frame.
Two grips provided so as to be able to move horizontally in the right angle direction
Feeding the workpiece to the claw support bar and the two gripping claw support bars;
One set of two symmetrically and equally spaced about the center line
A plurality of sets of work gripping claws and the work gripping claws are normally closed
Urge the two gripping claw support rods inward to each other
A plurality of springs and the workpiece fixed on the guide table
The workpiece feed center is placed on a guide table perpendicular to the feed center line.
Provided symmetrically horizontally movable across the line and opposed to each other
The tip surface is open at the top and the two
The set of open / close plates and the set of open / close plates are closed to each other
Biasing spring and the lower slide lower surface at the position corresponding to the open / close plate.
It is fixed downward and the lower slide descends to the inclined surface.
An opening / closing tool for abutting the opening / closing plate and the gripping claw support;
The work gripping claw is opened by being pivotally supported by the holding rod and abutting against the open / close plate.
And a roller for closing the die set for each process.
It is composed of a removable unit and the lower slide moves up and down.
Equipped with a transfer mechanism that forcibly opens and closes the gripping claws all at once.
It's an eel.

[0014]

The camshaft is directly rotated by the drive motor via the rotation transmitting member, and the upper slide and the lower slide connected to each other are perpendicular to the frame by the rotation of the drive cam fitted at the center of the camshaft. Press work is performed by moving up and down along a plurality of provided guide posts. Therefore, there is no intermediate shaft between the drive motor and the cam shaft, and a simple structure in which the upper slide and the lower slide are moved up and down by one drive cam, and the guide surface of the upper slide and the lower slide is a guide post type Therefore, the work of sliding the sliding surfaces becomes unnecessary.

Further, the die set is a unit for each process in which the lower die set base and the upper die set base are divided for each process, and the upper die set base can move up and down along a guide bar erected on the lower die set base. And a unit in which one unit of a method of detachably attaching this unit to a predetermined position on a positioning plate by a positioning means is defined as one block. For this reason, if you set the punch and die necessary for the next processing in the spare unit and complete the setup adjustment,
It is only necessary to replace the unit when changing the work.

The work holding claws of the transfer mechanism are simultaneously opened and closed by an opening and closing tool fixed to the lower slide.
Therefore, it is not necessary to adjust the opening / closing timing each time the tool content of the die set changes.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a small cam type transfer press machine of the present embodiment, and FIG. 2 is a side view thereof. A frame 3 is erected on a leg 1 installed on the floor via an oil pan 2. The frame 3 has an upper portion formed on the bolster surface 3a and a lower frame 3A having an opening 3b at a lower portion into which a knockout device (not shown) enters, a middle frame 3B having an opening 3c into which a die set or the like described later enters, and a crown-like shape. The camshaft 4 has a three-layer structure including the upper frame 3C, and the camshaft 4 is rotatably and horizontally supported by a bearing provided at a joint between the upper surface of the middle frame 3B and the lower surface of the upper frame 3C. A drive cam 5 is fitted at the center of the camshaft 4, and a flywheel 6 having a plurality of V-grooves on its outer periphery is rotatably supported at the right end, and an air clutch is provided adjacent to the flywheel 6. The brake 7 is attached.

A drive motor 9 is fixed on the upper frame 3C via a support 8, and a plurality of drive motors 9 are provided between the pulley 11 fitted on the output shaft 9a of the drive motor 9 and the V groove of the flywheel 6. Belt 12 is stretched. The frame 3 has four guide posts 13 having a circular cross-sectional shape erected on the lower frame 3A so as to penetrate the middle frame 3B and the upper frame 3C. The upper end of the guide post 13 projects from the upper frame 3C, and the lower portion has a lower portion. It is exposed at the opening 3c of the middle frame 3B.

An upper slide 14 is slidably fitted to a portion of the guide post 13 protruding from the upper frame 3C, and a lower slide 15 is slidably fitted to a portion of the middle frame 3B exposed to the opening 3c. The lower slide 15 and the lower slide 15 are firmly connected to each other by four columns 10 (FIG. 9). And upper slide 14 and lower slide 15
Follower rollers 16 and 17 are pivotally supported respectively, and the follower rollers 16 and 17 abut against the drive cam 5 on a vertical line passing through the axis of the camshaft 4, and the upper slide 14 and the lower slide 15 are rotated by the rotation of the drive cam 5. Move up and down together.

On the other hand, a die set 20 provided between the bolster surface 3a of the lower frame 3A and the lower surface of the lower slide 15 is provided on a positioning plate 21 fixed on the bolster surface 3a as shown in FIG. The unit 30 in the first step of the die set 20 is positioned on the upper surface of the guide table 22 fixed on the positioning plate 21 as shown in FIG. Key 23
A and 23B allow a horizontal direction parallel to the camshaft 4 (hereinafter referred to as a workpiece feed direction) and a positioning bolt 34 described later.
, The horizontal direction perpendicular to the cam shaft (hereinafter referred to as the material feed direction) is regulated. As shown in FIG. 5, the unit 50 after the second step includes a plurality of positioning keys fixed at equal pitches on the positioning plate 21. The workpiece feeding direction is regulated by the reference numeral 24, and the material feeding direction is regulated by a positioning bolt 59 described later.

In the lower part 25 of the die set of the unit 30 in the first step (hereinafter simply referred to as the lower part), a guide groove for engaging with the positioning keys 23A and 23B is formed integrally on the lower surface. Two bars 26, 26 are planted upward. A die set upper base (hereinafter simply referred to as an upper base) 29 is provided on the guide bars 26, 26 via sleeves 27, 27 so as to be vertically movable, and the upper base 29 is constantly urged upward by a spring (not shown). . Then, the die 31 is removably embedded in the lower table 25, and the upper table 29 is detached.
A punch 33 is detachably mounted concentrically with the die 31 via a punch holder 32.

Further, a positioning bolt 34 for regulating the position in the material feeding direction is provided on the front end surface 25a of the lower base 25, and is formed on the upper surface of the upper base 29 by a plurality of locking pieces 35 fixed to the lower surface of the lower slide 15. T groove 3 in the material feed direction
An engagement protruding piece 36 having a T-shaped cross-section is fixedly engaged with the first protrusion 5a (FIG. 3) so as to freely engage and disengage. Therefore, the unit 30 in the first step can be easily taken out of the machine by removing the mounting bolts 37 and 37 and pulling it out to the front side (the right side in FIG. 4) in the material feeding direction.

At the upper position of the lower slide 15 in the first step, two guide bars 38, 38 of the blank feeder 40 are vertically implanted, and slide on the guide bars 38, 38 via bushes 39, 39. The block 41 is provided so as to be vertically movable, and the slide block 41 is
2 and 42 are always urged upward. A cam follower 43 is pivotally supported on the slide block 41 by a pin 42, and the cam follower 43 is in contact with a plate cam 44 fitted on the cam shaft 4. Further, the upper end of the work push rod 45 is detachably held on the slide block 41, and the work push rod 45 is attached to the unit 30 of the first step.
The punch 33 and the center hole of the die 31 are inserted,
When the unit 30 in the first step is taken out of the machine, it can be taken out by removing the bolts 41a.

Further, a work supporting rod 47 of a knockout device (not shown) provided in the opening 3b of the lower frame 3A is vertically movably fitted into the first process corresponding hole 21a of the positioning plate 21. The support rod 47 is constantly urged upward by a spring (not shown), and is moved up and down by a plate cam (not shown). Guide table 22 sandwiched between work support rods 47
Is lowered to the work feed reference surface 22a.

The lower base 51 of the unit 50 of the die set 20 after the second step shown in FIG. 5 has a guide groove integrally engaged with the positioning key 24 shown in FIG. Two guide bars 52, 52 are implanted upward. An upper base 54 is provided on the guide bars 52, 52 via sleeves 53, 53 so as to be vertically movable. The upper base 54 is constantly urged upward by a spring 55. A die 56 is removably embedded in the lower base 51, and a punch 58 is detachably mounted on the upper base 54 via a punch holder 57 concentrically with the die 56.

Further, positioning bolts 59 for positioning in the material feeding direction are provided on the rear end surface 51a of the lower base 51, and are formed on the upper base 54 by a plurality of locking pieces 35 fixed to the lower slide lower surface. A locking projection 61 having a T-shaped cross-section is fixedly engaged with the T-shaped groove 35a so as to be freely engaged and disengaged. Therefore, the unit 50 in the second and subsequent steps includes the bolt 6 of the clamp piece 62 provided on the positioning plate 21.
7 can be loosened, the mounting bolt 63 can be removed, and it can be easily taken out of the machine by pulling it back (left side in FIG. 5) in the material feeding direction.

If the respective contact surfaces of the clamp piece 62 and the lower base 51 can be slid with a small gap, the unit 5 in the second and subsequent steps can be removed simply by removing the mounting bolt 63.
0 can be taken out of the machine, so that taking out is further simplified.

A work support bar 69 is axially movably fitted in the center hole of the punch 58 after the second step, and the work support bar 69 is constantly urged downward by a spring 66. Further, a work lifting rod 64 which is moved up and down by a plate cam of a knockout device (not shown) is inserted into the corresponding hole 21b of the positioning plate 21. A knock pin 65 is inserted into the center hole of the die 56 so as to be vertically movable. Yes, second
The workpiece, which has been subjected to a process such as bending or drawing by the punch 58 and the die 56 after the process, is moved to the workpiece feeding reference plane (the lower table 51).
(Upper surface) 51a.

FIG. 6 shows the work holding claws 78A, 78 of the transfer press mechanism 70 for sequentially transferring the work W to the next step.
It is a top view of the slide part which has B. This slide portion is provided with a guide groove in the workpiece feed direction cut out on the guide base 22 on the left side of the positioning plate 21 and the guide base 6 on the right side.
8 (FIG. 9) are provided so as to be able to move horizontally along the guide groove in the work feed direction cut out on the work guide surface 8 (FIG. 9), and the bottom surfaces of the guide grooves at both ends are work feed reference surfaces 22a and 68a. Similarly, the upper surface 51a of the lower base 51 of the unit 50 after the second step, which is the same height as the work feeding reference surfaces 22a and 68a, is also set as the work sending reference surface. Are horizontally moved on the lower base 51 after the second step along the guide groove of the second step.

A transfer slide frame 71 (hereinafter referred to as a slide frame) constituting an outer frame of the slide portion is formed by connecting two side bars 71A and 71B having a rectangular cross section in parallel by connecting shafts 72A and 72B. Both ends in the longitudinal direction are connected by end bars 71C, 71D, and are symmetrical with respect to a horizontal line aa (hereinafter referred to as a work feed center line) passing through the axis of the punch 33, 58 or the die 31, 56 in each step. Is formed. Then, gripping claw support bars 75A, 75B having a rectangular cross-sectional shape are provided on the slide frame 71 in such a manner as to be movable in the material feeding direction with the connecting shafts 72A, 72B as guides and symmetrically provided with respect to the workpiece feeding center line aa. .

The gripping claw support rods 75A and 75B are urged to close each other by a plurality of springs 76, and the approach distance is regulated by the width of the large diameter portion at the center of the connecting shafts 72A and 72B. As shown in FIG. 7, the gripping claw support rods 75A and 75B have grooves 75 in the material feeding direction for each process pitch.
The groove 75a is formed on a T-shaped sliding surface by lower lids 77A and 77B fixed to the lower surface, and the work gripping claw 78 shown in FIG. 8 is formed on the T-shaped sliding surface.
A and 78B are movably fitted symmetrically with respect to the workpiece feed center line aa. Further, a gripping claw support rod 75A,
Spring holding plates 79, 79 are fixed to the side surface of 75B, and the work gripping claws 78A, 78B are constantly closed and urged by a plurality of springs 81, and the protruding position is regulated by the rear end protrusion 78a. I have.

On the other hand, on the upper surfaces of the guide tables 22 and 68, a guide in the material feed direction is fixed on a guide groove in the work feed direction, and the opening / closing plates 82A, 82B are movable along the guide and work feed. It is provided symmetrically with respect to the center line aa. The open / close plates 82A, 82B are always closed and urged by a spring 83, and their opposing end surfaces are formed on inclined surfaces 82a, 82a which open upward, and a projection 82b is integrally provided below the end. Have been. The grip claw support bar 75A is attached to the inner end surface of the projection 82b.
Rollers 84 pivotally supported at both ends abut on 75B.

On the other hand, on the lower surface of the lower slide 15 facing the guide tables 22 and 68, an opening / closing tool 86 whose lower end is formed in a V-shape at the upper position of the opening / closing plates 82A and 82B via an L-shaped bracket 85 is directed downward. The lower slide 15 and the opening and closing tool 86 are moved up and down to move the opening and closing plate 82A,
82B is opened and closed, and the gripping claw support rod 75 is
A, 75B and grip claws 78A, 78B open and close.

As shown in FIG. 1, a side shaft 93 is rotatably supported on brackets 91 and 92 on the left side surface of the frame 3. The side shaft 93 is driven by the cam shaft 4 via bevel gears 94 and 95. The feed cam 96 for the transfer mechanism 70 is fitted on the side shaft 93. Further, a guide table 97 in the work feeding direction is attached to the left side surface of the frame 3, and a moving plate 98 is mounted on the guide table 97 so as to be horizontally movable in the work feeding direction. The two cam followers 9 rotatably supported by the moving plate 98
9, 99 abut on both sides of the feed cam 96,
6, the movable plate 98 is horizontally moved by the rotation of the slide frame 6, and the movable plate 98 is
It is connected to one end bar 71D.

Further, a bottom shaft 46 is rotatably supported by the lower frame 3A through the opening 3b, and the bottom shaft 46 is rotated by the side shaft 93 via bevel gears 48 and 49, and the opening 3b is rotated. A plurality of plate cams (not shown) for driving a knockout device (not shown) provided on the bottom shaft 46 are fitted to the bottom shaft 46. As shown in FIG. 2, an air feeder 88 for feeding the material M and a material guide 87 having a rotatable roller 89 for guiding the material are mounted on the lower frame 3A.

Next, the operation of the present embodiment will be described.
Die set 2 before the current press working is over
0 for the first unit 30 or the second unit
Punches and dies necessary for the next press working are mounted on the unit 50 after the process, and setup operations such as centering of the punches and dies are completed. Further, work gripping claws 78A and 78B are mounted on the spare transfer mechanism 70 in advance.

After a predetermined number of press workings are completed, the unit 30 in the first step or the unit 50 after the second step is removed from the positioning plate 21 and the work is switched by simply replacing it with a prepared unit that has been set up. The setup work of the time ends. After the new material M is mounted on the material guide 87 and the air feeder 88, the cam shaft 4 is directly rotated by the drive motor 9 and the upper slide 14 and the lower slide 15 are moved along the guide post 13 by the center drive cam 5. Move up and down.

When the lower slide 15 is lowered, the upper base 29 of the unit 30 in the first step of the die set 20 and the upper base 54 of the unit 50 in the second and subsequent steps are simultaneously lowered together with the lower slide 15, and the lower slide 15 is lowered. When the dead center position is reached, a work (blank) is punched out by the punch 33 and the die 31 in the first step, and drawing or bending is performed by the punch 58 and the die 56 in the second step and thereafter. By moving the lower slide 15 to the bottom dead center, the V-shaped protrusion of the opening / closing tool 86 causes the inclined surface 8 of the opening / closing plates 82A, 82B to be moved.
2a and 82a, gripping claw support bars 75A and 75B are opened via rollers 84, and work gripping claws 78A and 78B are opened.
Opens.

In this state, the contact surfaces of the upper and lower follower rollers 16 and 17 of the drive cam 5 become concentric portions, and the lower slide 15 stops at the bottom dead center position. The blank punched in the first step is lowered between the workpiece support rods 47 and pushed down to the workpiece feeding reference surface 22a. In the second and subsequent steps, the work lifting rod 69 of the knockout device (not shown) rises, and the work support rod 67 and the knock pin 65 are moved.
Is lifted up to the work feed reference surface 51a. During this time, the slide frame 71 with the work holding claws 78A and 78B of the transfer mechanism 70 open is moved leftward by one pitch by the feed cam 96.

Next, the contact surface of the drive cam 5 becomes an eccentric part, the lower slide 15 rises, and the upper stands 29, 54
At the same time, the punch separates from the die, and at the same time, the opening / closing tool 86 separates from the opening / closing plates 82A, 82B, and the workpiece gripping claws 78A, 78B simultaneously grip the workpiece. Then, while the lower slide 15 rises to the top dead center and stands still, the slide frame 71 moves rightward by the feed cam 96 to transfer the work W held by the work holding claws 78A and 78B to the next step, and at the same time, The material M is fed one pitch by the air feeder 88. In this way, each time the camshaft 4 makes one rotation, the work is processed one step at a time, and the final step is completed to become a product, which is stored in a storage box prepared by a product discharge device (not shown).

[0041]

The cam-type small transfer press of the present invention is constructed as described above, and has the following effects. According to the first aspect of the present invention, the conventional intermediate shaft is removed by directly driving the cam shaft by the driving motor, and the driving cam for the cam shaft is reduced to one at the center portion, and the driving cams provided at both left and right end portions are reduced by half. Therefore, the structure is simplified and the cost is reduced. Further, since the guides in the vertical direction of the upper slide and the lower slide are a plurality of guide posts erected on the frame, the work of sliding the sliding surfaces is eliminated, the assembly time is shortened, and the cost is reduced.

Also, since the die set is a plurality of units which can be taken out of the machine for each process, the setup work can be performed for each process outside the machine, and the next setup can be performed while the machine is in operation. By performing the work, the operation rate can be improved and the work efficiency can be improved. In addition, if the next processing can be handled by changing only a part of the process of the die set that is currently being processed, the setup can be changed simply by replacing the necessary process units, greatly reducing the setup time. can do.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the work gripping claw of the transfer mechanism is forcibly opened and closed simultaneously by up and down movement of an opening and closing tool fixed to the lower slide.
Since the transfer mechanism is made independent, the structure is simple and the manufacturing cost is low, and it is not necessary to mount the opening / closing tool for each process every time the setup is changed, so that the setup time can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a cam-type small transfer press according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a partially enlarged view of FIG. 1, illustrating a part of a die set and a transfer mechanism, and a front view of a blank feeding device.

FIG. 4 is a cross-sectional view of the unit in the first step of the die set taken along line AA of FIG. 3 when viewed from the side.

FIG. 5 is a cross-sectional view of the unit after the second step of the die setting, taken along the line BB in FIG. 3, viewed from the side.

FIG. 6 is a top view of a slide portion of the transfer mechanism.

FIG. 7 is a diagram illustrating a part of a gripping claw support bar of a transfer mechanism and a workpiece gripping claw.

8A is a top view of a work gripping claw, and FIG. 8B is a side view thereof.

FIG. 9 is a side view mainly showing a gripping claw opening / closing portion of the transfer mechanism.

FIG. 10 is a front view of a conventional cam transfer press machine.

FIG. 11 is a side view of FIG. 10;

FIG. 12 is a diagram illustrating a ram sliding surface according to a conventional technique.

FIG. 13 is a front view of a conventional die set.

FIG. 14 is a side view illustrating a gripping claw opening / closing section of a transfer mechanism according to the related art.

[Explanation of symbols]

 3 Frame 4 Camshaft 5 Drive cam 6 Flywheel 9 Drive motor 13 Guide post 14 Upper slide 15 Lower slide 16, 17 Follower roller 20 Die set 21 Positioning plate 22, 68 Guide stand 23A, 23B, 24 Positioning key 25, 51 Die set Lower stand 26,52 Guide bar 29,54 Die set upper stand 30 Unit of first step 31,56 Die 33,58 Punch 34,59 Positioning bolt 40 Blank feeder 50 Unit of second step and subsequent steps 55,96,81 Spring 70 Transfer Mechanism 71 Transfer slide frame 75A, 75B Gripping claw support rod 78A, 78B Work gripping claw 82A, 82B Opening / closing plate 84 Roller 86 Opening / closing tool 96 Feed cam 99 Cam follower

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-49-71557 (JP, A) JP-A-60-152399 (JP, A) JP-A-4-84632 (JP, A) 205691 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B30B 13/00 B21D 43/05 B30B 1/26

Claims (2)

(57) [Claims] 1. A camshaft having a plurality of guide posts vertically provided on a frame of a press machine, a drive cam provided at a central portion of the frame so as to be rotatable horizontally, and a drive cam at a center portion and a flywheel at an end portion. And an upper slide that is rotatably provided along the guide post and vertically rotatable with respect to the drive cam and sandwiches the camshaft, and has a rotatable follower roller on each of the upper and lower sides and connected vertically by a connecting member. A lower slide, a drive motor that directly drives the camshaft via a rotation transmitting member, and a bolster on the frame.
Both ends in the work feed center line direction on the positioning plate fixed to
Along the guide in the direction of the workpiece feed center line
Horizontally movable so as to penetrate the die set
Transfer slide frame and transfer slide
Horizontally perpendicular to the workpiece feed center line within the frame
Two gripping claw support bars provided movably, and the two
Symmetrical with respect to the work feed center line
A set of two or more sets of workpieces
The two claws so that the holding claws and the work gripping claws are always closed.
A plurality of springs for urging the gripping claw support rods inward each other;
Direction perpendicular to the workpiece feed center line fixed on the guide table
Symmetrically across the work feed center line
The movably installed end faces facing each other open up and win
A pair of open / close plates formed on the inclined surface of the hand;
A spring that closes the pair of open / close plates and urges them freely;
The lower surface is fixed downward to the position corresponding to the open / close plate on the lower surface of the guide.
When the lower slide descends, it comes into contact with the inclined surface and
An opening and closing tool that opens, and the opening and closing tool pivotally supported by the gripping claw support rod.
A roller that opens and closes the work gripping claw in contact with the closing plate
And forcibly grip the claws all at once by moving the lower slide up and down.
A small cam type transfer press machine comprising a transfer mechanism for opening and closing . 2. A vertically mounted frame of a press machine.
Multiple guide posts and the upper part of the frame horizontally
It is rotatably provided with a drive cam at the center and a flywheel at the end.
A camshaft having an eel and a vertical
The drive card is provided movably along the guide post.
The rotatable follower roller that comes into contact with the
Upper and lower connected to each other by a connecting member
And the lower slide and the cam shaft via a rotation transmitting member.
And the drive motor to drive directly, and on the bolster of the frame
A positioning plate fixed to the
A plurality of die set lower stages for each process to be mounted;
A plurality of vertical guides erected on each of the lower sets
The lower slide is provided movably along the id bar.
Die set for each process, which is detachably engaged with the lower surface
An upper base and a spring that constantly urges the die set upper base upward.
And the die set lower base at a predetermined position of the positioning plate.
Positioning means for mounting and work on positioning plate
The guide table fixed at both ends in the feed center line direction is feeding the work.
Water should be drawn through the die set along the
A transfer slide frame provided so as to be movable horizontally,
In the transfer slide frame, the workpiece feed center line is provided.
Two handles provided to be able to move horizontally in the direction perpendicular to
The workpiece is transported to the holding claw support rod and the two gripping claw support rods.
With two symmetrical and equal pitches
One set of plural sets of work gripping claws
Attach the two gripping claw support rods inside each other so that they close
A plurality of springs, and the work fixed on the guide table.
The workpiece is being fed onto the guide table perpendicular to the feed center line.
Provided symmetrically horizontally movable across the core wire and opposed to each other
The two end surfaces are formed on the inclined surface that opens up
A set of open / close plates and the set of open / close plates are closed with each other
A biasing spring and a position corresponding to the opening / closing plate on the lower surface of the lower slide.
Is fixed downward to the inclined surface when the lower slide is lowered.
An opening / closing tool for opening the opening / closing plate by contacting the gripper;
The work gripping claw is pivotally supported by the support rod,
A die set for each process
Up and down movement of the lower slide
Transfer mechanism that forcibly opens and closes the gripping claws all at once.
Cam type small transfer press machine, characterized in that it comprises.