JPS5951399B2 - Bottom drive rotary transfer press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bottom-driven rotary transfer press in which stations for loading, unloading, or processing workpieces are arranged in an annular manner.

2. Description of the Related Art Transfer presses, in which the conveyance direction is a straight line, have been proposed as a type of press work line in which continuous press work is performed while sequentially and intermittently conveying a workpiece from one station to a station for the next process.

However, such a type requires a relatively long device along the conveyance direction, and it is unavoidable that the loading position of the workpiece and the unloading position of the completed workpiece are opposite to each other in the conveyance direction. However, there are restrictions on the equipment installation conditions and a sufficient installation area is required.

Special consideration must also be given to the method of loading and unloading press molds when switching over to rod production.

The present invention has been made to solve the above-mentioned problems.
Stations for carrying out or processing are arranged in a circular pattern so that workpieces can be sequentially transferred from one station to the next. During work, a slide that can be moved up and down and a lifting drive device that moves this slide up and down are used. The purpose of the present invention is to provide a lower drive type rotary transfer press that can efficiently carry out several steps of press working using the press machine, and furthermore, the lifting drive device can be stored compactly in a suitable location.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lower drive rotary transfer press according to the present invention will be described below with reference to the drawings.

In Figures 1 to 3, reference numeral 1 denotes a pillar with a polygonal cross section that stands upright from the center of the bed 2, and around the top of the pillar 1 there is a slide 3 that can move up and down while being guided by the pillar 1. It is.

This slide 3 is composed of a frame portion 4 surrounding the pillar 1, and a ceiling frame portion 5 that closes the upper end of the surrounding frame portion 4,
The shape of the innermost wall 6 of the surrounding frame portion 4 is formed into a polygonal cylindrical shape that fits around the pillar 1.

That is, a square corner surface 1a is formed on the pillar 1, and a square corner inner surface 6a is formed on the innermost wall 6 opposite to this square corner surface 1a.

A guide member 7 is attached to the square corner surface 1a, and a guided member 8 that can come into contact with the guide member 7 is attached to the inner surface 6a of the square corner.

Both members 7 and 8 are brought into contact with an inclined surface 9, and the guide member 7 is configured to be able to adjust its guide position.

The bed 2 is supported by an underframe 10, and the bed 2 and the underframe 10 constitute a bed body 11.

In FIGS. 4 and 5, reference numeral 12 denotes a lifting drive device for vertically moving the slide 3, and a main motor 13 disposed within the underframe 10.
The clutch 14 is rotatably attached to the underframe 10 and
a horizontal drive shaft 16 having a brake 15 and a brake 15; a winding transmission 18 that interlocks the flywheel 17 attached to the drive shaft 16 and the main motor 13;
6, an intermediate gear 21 attached to an intermediate shaft 20 disposed parallel to the drive shaft 16 and meshing with the driving gear 19, an intermediate gear 22 attached to the intermediate shaft 20, A main shaft 2 provided parallel to the shaft 20
3 and the intermediate gear 22 attached to this main shaft 23.
a driven gear 24 that meshes with the main shaft 23, an eccentric wheel body 25 attached to the main shaft 23, a connecting rod 26 that fits onto the eccentric wheel body 25, and a connecting rod 26 that is attached to the free end of the connecting rod 26 via a pin 27. A plunger 29 is guided to be movable up and down in a cylindrical guide hole 28 formed in the center of the column 1 in the vertical direction, and a pull rod 30 is threadedly coupled to the plunger 29 and located in the cylindrical guide hole 28.
and a slide adjustment device 31 (see FIGS. 1 and 2) that connects this pull rod 30 and the slide 3 side.

This slide adjustment device 31 also serves as an overload prevention device, and its connection is performed as follows.

That is, the upper end of the pull rod 30 is formed into a threaded portion 30a, and a worm wheel 32 is screwed into the threaded portion 30a.
is disposed in a case 33 mounted on the ceiling frame portion 5 so as to be rotatable only.

A worm 34 meshing with the worm wheel 32 and rotatably supported by the case 33 is interlocked and connected to a drive device 35 provided on the ceiling frame portion 5 via a speed reduction device 36.

Reference numeral 37 denotes slide balancers, which are arranged at multiple locations in the circumferential direction between the slide 3 and the column 1.

The plurality of positions on the bed 2 in the circumferential direction are station positions, and the number thereof is changed depending on the number of press steps, the size of the equipment, etc.

In the example, a constant angle θ of 45 degrees as shown in FIG.
There are eight stations A, B, C, and D at every turn.

Set E, F, G, H, material loading station A, processing station B, C, D, E,
Although F, G, and product unloading stations H are used, loading/unloading stations A and H may also be used as processing stations.

Each processing station B, C, D. E, F, G
A press mold receiver having a roller conveyor device 38 which can be raised and lowered is provided with a stand 39, and a press mold carrying-in roller conveyor device 40 connected to the raised roller conveyor device 38 is arranged in the radial direction.

In FIG. 1, reference numeral 41 denotes a press mold, which includes a lower mold 42 that is movable between both roller conveyor devices 38 and 40, and an upper mold 44 that is detachable from the lower surface of the surrounding frame portion 4 via a sub-slice V43. The lower mold 42 is lowered by the roller conveyor device 38, and the press mold bone is fixed on the table 39.

In FIG. 3, reference numeral 45 denotes a workpiece conveyance device, and a receiver surrounding the column 1 and connected from a plurality of locations on the column 1 includes an annular rail 47 that is rotatably supported by a member 46, and an annular rail 47 that is rotatably supported by a member 46. An annular feed bar 49 located on the outside and movably guided by guide pins 48 erected from a plurality of locations on the annular rail 47, a clamp device 50 provided at a plurality of locations on the feed bar 49, and a feed bar intermittent It consists of a drive device 51 (see FIG. 6).

This feed bar intermittent drive device 51 moves the feed bar 49 at a constant angle θ in synchronization with the vertical movement of the slide 3 so that the clamp device 50 corresponds to each station A to H.
It rotates intermittently back and forth within a range, as shown in Figures 3 and 4.
As shown in FIG. 6, a tooth-shaped portion 52 formed on a part of the inner side of the annular rail 47, and a pinion 53 that meshes with the tooth-shaped portion 52,
A pinion shaft 54 to which this pinion 53 is attached at the upper end and passing through the bed 2, and a driven pinion 55 which is attached to the lower end of this pinion shaft 54 and located within the underframe 10.
The guide body 56 meshes with the driven pinion 55 and the guide body 56
a rack shaft 57 that can reciprocate horizontally while being guided by;
a swinging lever 59 for feeding, one end of which is connected to the rack shaft 57 for relative swinging, and the middle supported by a horizontal shaft 58;
It consists of a cam follower 60 attached to the other end of the swing lever 59, a feed cam 61 with which the cam follower 60 is in constant contact and attached to the main shaft 23, and a feed restraining cylinder 62.

As a result, the workpiece conveyance device 45 operates in conjunction with the lift drive device 12 side of the slide 3 (completely synchronized by mechanical coupling).

In Fig. 5, 63 is a feed bar lifting/lowering drive device;
As shown in FIG. 6, a lift cam 64 attached to the main shaft 23 and a cam follower 65 that can come into contact with the lift cam 64 are attached to one end and are swingably attached via a horizontal shaft 66. a swinging lever 67 for a lift,
A pinion 69 that meshes with a sector gear 68 formed on this swing lever 67, a pinion shaft 70A on one side to which this pinion 69 is attached, and bevel gears 71, 72 (see FIG. 4) and transmission The pinion shaft 70B on the other side interlocks via the shaft 73, and these pinion shafts 7
Drive pinions 74A, 74B attached to 0A, 70B, and guide bodies 75A, 75B (hereinafter referred to as fifth
Rack shafts 76A, 76 that can be raised and lowered by being guided by
B, vehicle lowering bodies 77A, 77B attached to the upper ends of these rack shafts 76A, 76B and located below the feed bar 49 at three locations in the circumferential direction, and the rack shafts 76A, 76B are biased downward. Restraint cylinder 78A, 7
It consists of 8B.

As a result, the feed bar elevating drive device 63 operates in conjunction with the elevating drive device 12 side of the slide 3 (completely synchronized by mechanical coupling).

In Figures 1 and 3, 79 is the material loading station A.
A material carrying-in device 80 is provided corresponding to the product carrying-out station H, and a product carrying-out device 80 is provided corresponding to the product carrying-out station H.

Next, the action will be explained.

Before starting the press operation, the following preparatory work is performed.

That is, with the slide 3 as the upper limit and the maximum space formed between the platform 39 and the sub-slide 43, the press mold 41 for each process is moved to each station B on the platform 39.
- Set to G.

In this set, press molds 41 for each process are transferred from each press mold carrying-in roller conveyor 40 to each roller conveyor device 3.
After the lower mold 42 is fixed on the table 39 by lowering the roller conveyor device 38, the slide 3 is lowered to an appropriate height and the upper mold 44 is attached to each sub-slide 43.

Next, the lower limit position of the slide 3 by the lifting drive device 12 is adjusted by the slide adjustment device 31.

This adjustment is performed by driving the worm 3 in the forward and reverse directions of the drive device 35.
This is possible by rotating the slide 3 in the forward and reverse directions, and by rotating the worm wheel 32 in the forward and reverse directions, the slide 3 side is raised and lowered relative to the pull rod 30 that is screwed into the worm wheel 32 through the threaded portion 30a.

Next, the relative positions of the upper die 44 and the lower die 42 at each press position are adjusted using each sub-slide 43.

After the above-mentioned preparatory work, the press work begins.

That is, while the slide 3 (upper die) is rising, the workpiece material is carried into station A by the material carrying device 79,
Further, the processed product is carried out from station H via the product carrying out device 80.

Then, by lowering the slide 3, pressing work is performed at each station A-H or station B-G.

During the next ascent of the slide 3, the workpieces at each station are held by the clamp device 50 and then lifted, and then transported to the next station by the forward rotation of the feed bar 49 at a constant angle θ, and then lowered. .

After this, the feed bar 49 returns by a certain angle θ,
The clamping device 50 has returned to its original position.

Next, the slide 3 is lowered to perform a pressing operation at each station A-H or B-G.

By reciprocating the clamp device 50 in this way, the workpiece is gradually processed and deformed, and the same clamp device 50
One-way intermittent transport with only forward movement is effective when it is not possible to hold the object with the same clamping device 50, and when it is possible to hold the object all the way with the same clamping device 50.

The workpiece is transferred to stations A-B as described above.
It is transported intermittently from B to C, etc., and the necessary processing is performed at the necessary stations.

Note that it is of course possible to carry in the workpiece material not only from station A but also from any other station, and the station for carrying out the finished workpiece material is not limited to station H, but also from the carry-in station or the process step. It can be changed arbitrarily depending on the number.

Furthermore, if the number of press processing steps may be small depending on the product, for example, the press mold 41 of station G may be removed and no processing will be performed at station G.

However, even in this case, it is sufficient to consider the movement of the feed bar 49 and install an object to receive the workpiece.

As the pillar 1, one having a circular cross section (cylindrical or cylindrical column) can be used.

As described above, according to the present invention, the slide 3 is raised and lowered, the annular rail 47 and the feed bar 49 are rotated by a predetermined angle, and the feed bar 49 is raised and lowered by simply operating the lifting drive device 12. There it is,
Since there is only one driving source, the structure is simple and economical, and the movements can be reliably synchronized.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway front view, FIG. 2 is a sectional view taken along II-II in FIG. 1, FIG. 3 is a sectional view taken along III-III in FIG. A cross-sectional plan view of the underframe portion, FIG. 5 is a cross-sectional view taken along line V--■ in FIG. 4, and FIG. 6 is a cross-sectional view taken along line v--vI in FIG. 1...Column, 1a...Square corner surface, 2
...Bed, 3...Slide, 4...
... Surrounding frame part, 5 ... Ceiling frame part, 6a
...Inner surface of square corner, 7...Guide member, 8...Guided member, 10...Underframe, 11...Bed body , 12... Lifting drive device, 23... Main shaft, 25...
Eccentric wheel body, 26... Connecting rod, 29
...Plunger, 30...Pull rod, 30a...Threaded portion, 31...Slide adjustment device, 32...Worm wheel, 34
... Worm, 35 ... Drive device, 3
7...Slide balancer, 39...
Press type bone is base, 41...Press type, 42...
...Lower mold, 44...Upper mold, 45...
・Workpiece conveyance device, 49... Annular feed bar, 50... Clamp device, 51...
Feed bar intermittent drive device, 63...Feed bar elevation drive device, 79...Material carrying device, 8
0...Product unloading device.

Claims (1)

[Claims] 1 A pillar 1 is erected from the bed 2 side, a slide 3 that can be moved up and down guided by this pillar 1 is arranged, and an elevating drive device 12 that moves this slide 3 up and down is inserted from inside the bed body 11 into the pillar 1. A plurality of stations A to H are formed in an annular shape between the upper surface of the bed 2 and the lower surface of the slide 3 so that a plurality of press molds 41 for each process can be arranged. , a workpiece transfer device 45 is provided for transferring a workpiece processed at one station A-G to stations B-H in the sequential method, and the workpiece transfer device 45
The receivers surrounding the column 1 and connected from a plurality of locations on the column 1 include an annular rail 47 rotatably supported by a member 46, and a plurality of annular rails 47 located outside the annular rail 47. The feed bar is composed of an annular feed bar 49 that is movably guided up and down by guide pins 48 erected from a certain point, clamp devices 50 provided at a plurality of places on the feed bar 49, and a feed bar intermittent drive device 51. The intermittent drive device 51 includes a feed cam 61 and a lift cam 64 that are rotated by the elevating drive device 12;
Rotatably supported by the bed 2 and an annular rail 47
A pinion 53 engages with the toothed portion 52 of the feed bar 49 and is rotated in conjunction with the rotation of the feed cam 61, and a pinion 53 is disposed directly below the feed bar 49 of the bed 2 so as to be movable up and down and is rotated in conjunction with the rotation of the lift cam 64. A lower drive type rotary transfer press characterized in that it is comprised of elevating bodies 77A and 77B that are raised and lowered to raise and lower a feed bar 49.