CS199335B1 - Container of machined objects for machine-tools - Google Patents

Description

The invention relates to a workpiece magazine for machine tools, in particular gear-cutting machines with pallets for workpieces arranged one above the other in two stacks, movable vertically and horizontally, to which a device for transferring the workpieces from the workpieces stack is associated.

Containers of this kind are known in which stacks of trays are arranged side by side. The stacks of pallets consist of stacked pallets. The pallets are sliding vertically and horizontally so they can circulate in a vertical circle. One stack then has a device for removing blanks or workpieces from the magazine.

Although the known device allows the pallets to circulate through both vertical stacks, it still has some serious drawbacks. Since the device for removing workpieces from the magazine is directed towards only one pallet, it is necessary for the pallet to move both vertically and horizontally so that the new workpiece or workpiece can be moved in front of the take-off device. Therefore, a large number of work steps is required, and thus a considerably long time before the machined workpiece can be removed from the magazine. When using highly productive machines, such as gear-cutting machines, especially when the tooth width is small, the time required to remove the workpiece is longer than the machining time, so that considerable time losses arise.

199 335

The purpose of the invention is to provide a machine tool magazine for machine tool magazine, regardless of the particularities of the machine tool feeder, to simplify the operation of loading and unloading the magazine, allowing economical production of small batches and arbitrary insertion and removal of workpieces from the magazine.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a workpiece magazine for machine tools, in particular gear-making machines, with two stacks of pallets arranged side by side, the pallets being movable vertically and horizontally. The shape and workpiece or stack of workpieces can be removed and machined by the machine tool feeder at one and the same location in as few steps as possible, in the shortest possible time.

These drawbacks are eliminated by a workpiece magazine for machine tools, in particular gear-making machines, with pallets for workpieces, vertically and horizontally displaceable, arranged in two stacks one above the other, with a device for transferring workpieces from the workpieces stack according to the invention. in that the transfer and takeover device for the workpieces is arranged in a position between the stacks of pallets.

According to the invention, for conveying the workpiece to one and the same point in the feed mechanism of a machine tool, the container transfer and takeover device consists of a horizontal pre-feeder and a vertical pre-feeder of the workpieces.

The synergy between the pallet and the horizontal pre-feeder according to the invention is ensured in that the horizontal pre-feeder consists of a carrier β by opening in the direction of horizontal movement of the pallet, which is fixed on the horizontal piston rod of the horizontal working cylinder.

According to the invention, a centering device is arranged between the horizontal transducer and the vertical transducer to stabilize the position of the workpiece to be transported.

The use of a horizontal and vertical transfer device makes it possible to adapt the magazine according to the invention to different machine tools at minimal cost. The time required for transferring the workpiece blank or workpiece between the magazine and the machine tool is very short, shorter than the actual working time of the machine tool. The workpiece can be removed from the magazine at any time and a new piece can be inserted into the magazine at any time. In addition, the container can be freely expanded by creating any number of pallet stacks.

An exemplary embodiment of a workpiece magazine for machine tools according to the invention is shown in the accompanying drawings, in which Fig. 1 shows schematically the cartridge in a view from the operator side, Fig. 2 shows a side view of the left stack of pallets when lifted; Fig. 4 shows the container as viewed from the operator side when the upper pallet of the left stack is suspended from the upper rails; Fig. 5 shows a section along line A - A in Fig. 4 and Fig. 4; 6 is a cross-sectional view taken along line BB of FIG. 4.

199 33S

The workpiece magazine 1 consists of a box-shaped frame 2 in which the pallets 1 are arranged in two stacks arranged side by side, that is to say in the left and right stacks. The pallets 2 in the left stack are lifted, while the pallets in the right stack are lowered. The pallets 2 ▼ in the highest upper position and in the lowest lower position are movable horizontally.

On the frame 2 there are arranged four pivotable cheap support levers 4 supporting the left atoh, and four pivotable right support levers 2 »supporting the right stack of pallets χ.

The left support levers 1 are provided with a left bevel 6 directed in accordance with the direction of circulation of the pallets X, while the right support levers 2 are provided with a right bevel 5, inclined downwards also in the direction of circulation of the pallets 2. Each right support lever 2 is additionally provided with a cam. The left support levers 4 are pushed inwardly by each of the compression springs 2, while the right support levers 2 are sprung outwardly by the tension springs 10.

A lifting device 11 is provided in the region of the left pallet stack 2, while a lowering device 12 is arranged in the region of the right pallet stack 2. The lifting device 11 and the lowering device 12 are similarly formed. The lifting device 11 consists of a left working cylinder 12, whose left piston rod 14 is connected by means of a left coupling 12 to a left bracket 16 which is movable vertically and is guided in the frame 2. The left bracket 16 is provided with a left arm 17 to the direction of movement of the pallets 2 and always supports the lowest pallet 3 of the left stack. The left working roller 13 is pivotally mounted on a left bracket 18 fixedly mounted on the frame 2 of the cartridge 1. Similarly, the lowering device 12 consists of a right working cylinder 19 whose right piston rod 20 is connected by means of a right connecting link 21 to a right angle 22 which is movable vertically and guided in the frame 2, Right angle 22 is provided with a right arm 23. it is also arranged perpendicular to the direction of movement of the pallets 2 and always supports the lowest pallet 2 in the right stack. The right hand roller 19 is also attached to the frame 2 by means of the right bracket 24.

Each pallet 2 consists essentially of a bottom 25 at the corners of which the abutments are fixed

26. the upper pallets 2 each with their bottom 25 abut on the upper surfaces of the supports 27 of the lower pallets 2 · the upper pallet 2 ^{in the} left stack and the lower plate 2 ^{in the} right stack are from of the stack can be detached and can be moved horizontally. The horizontal movement of the pallets: 2 J® allow both upper rails 29th both lower rails both the 30th running of the two stacks of pallets 2 »partly underneath, while the upper rails 29 are arranged left and right of the recesses 31 · recess 22 ^{on the} lower rail 30 the lower rollers 22 are fastened. · The left recesses 31 and the right recesses 32 are sized so that the upper rollers 28 of the pallets 2 can pass through. Each left recess 31 is bridged by the left closing plate 21 and each right recess 32 is bypassed by the right closing plate 35. if necessary, the vertical movement of the pallet 3, behind it, can be prevented

199 33S suspended on upper rails 29 by means of upper rollers 28.

The left closure plates 34 are resiliently held in a horizontal position to close the left recesses 31, while the right closure plates 35 are resiliently held in a vertical position where the right recesses 32 remain open.

The upper working rail 29 is provided with the upper working cylinder 3,6 and the lower rail 30 with the lower working cylinder 37. The upper working cylinder 36 is provided with an upper piston rod 38 which carries the upper sliding member 22. The lower working cylinder 37 is provided with a lower piston rod 40 a lower slide member 41. A latch 42 is formed on the upper slide member 39 which secures the upper pallet 2 against undesirable displacement to the right. The pawl 42 slides out of engagement with the pallet 2 by the ejector 43 disposed in its travel path.

A transfer and takeover device 44 is provided above the two stacks ²⁸ at the same time between the two stacks. The transfer device 44 consists of a horizontal transfer device 45, a vertical transfer device 46 and a centering device 12.The horizontal transfer device 45 is displaceable in a direction perpendicular to the pallet 2. ^{in the} position in which the workpieces or workpieces are handed over and received as shown in Fig. 5 and consists of a horizontal working cylinder 48, on whose horizontal piston 49 is arranged a reciprocating carrier 50 for changing the workpiece or workpiece between any pallet ²⁸ by a vertical feeder 46 in the upper loading plane 51.

The vertical feeder 46 consists of a vertical working cylinder 52, on whose vertical piston rod 53 a lifting plate 5.4 'is arranged which moves between the upper loading plane 51 and the lower loading plane 55 of the machine tool feed system (not shown).

On the upper piston rod 38 of the upper working cylinder 36 is mounted a cam rod 56 whose cams 57 are arranged parallel to the upper rail 29 and are adjustable to the distance between the blanks 58 and the workpieces 22. 36.

Depending on the diameter and shape of the workpiece, interchangeable partition walls 61 are provided on the bottom 25 of each pallet 2.

The workpiece magazine for machine tools according to the invention operates as follows:

The top pallet 2 ^{in the} uppermost position between the left and right stacks of pallets 3 is in the transfer and acceptance positions. The pallet 2, which is the lowest one, has been detached, as shown in FIG. 1, from the right stack and moved below the left stack.

When the workpiece 58 is passed to the machine tool feed mechanism and the finished workpiece 59 is received, the horizontal work roll 48 is actuated and the carrier 50 pushes the goods from the pallet 2 at the level of the upper nonclading plane gjf to the lift plate 6 which lifts against the centering device 4. ?. Thereafter, the lift plate 54 is lowered to the level of the lower loading plane 55 under the action of the working cylinder 52, where the blank 58 takes over the feed mechanism of the machine tool. The machine-machined workpiece 9 feeds the machine tool feeder onto a lifting plate 54 which, by means of a vertical working cylinder 52, lifts to a horizontal transfer device 45 which operates at the upper loading plane 51 in which the workpiece 59 is gripped by a gripper 50. £ 6 handlers. By actuating the horizontal working roller 4.8, the driver 50 is moved forward and thereby the workpiece 22 is pushed onto the pallet 2o of the position where the blank 58 was previously.

Then, the upper work roll 36 moves the top pallet resting nejvýěe 2 ⁰ spacing between £ 8 blanks or workpieces 22 »stored on the pallet 2 · This movement is controlled by cams 57 arranged on the cam rod 56. As the cam 57 closes the switch 60 stops the moving the upper working roller 36 in a position where the other blank 58, deposited on the pallet 2, is engaged with the carrier 50.

When the upper pallet 2 is completely filled with the finished workpieces 22, it stands exactly above the right stack of pallets 2. As the upper pallet 2 is moved in steps, the upper rollers 28 of this pallet 2 lower the right closing plate 35 downwards to the right the closure plates 35 cover the right recesses 32 in the upper rails 29 so that the upper pallet 2 suspended from the upper rails 29 cannot drop downwards. As the upper pallet 2 moves to its extreme right position, the latch 42, with its wedge face, strikes the ejector 43, which slides the latch 42 out of engagement with the upper pallet 2. The left angle bracket 16 lowered by the action of the left working cylinder 13 so that its left arm 17 is below the bottom 25 of the lowest-placed pallet 2 of the left stack that has been pushed from beneath the right stack as described. The upper piston rod 38 and the lower piston rod 40 then return to their starting positions.

The left working roller 13 and the right working roller 19, respectively, will actuate both the left working roller 13 and the right working roller 19. The left working roller 13 lifts the left stack of plaques 2 which has so far rested on the left support levers 6, and the right working roller 19 lifts the right stack of pallets 2, which has so far rested on the right support levers 2, but the lifting height of the two stacks of pallets 2 is different.

The lift of the left pallet stack 20 is so large that the upper rollers 28 of the pallet 2 ' 2 lie at the top of the left stack pallet 2 and penetrate the left recesses 11 of the upper rails, raising the left closure plates 34 to a vertical position. continue to lift to the extent that they pass the left closing plates 34 «which automatically fold down de horizontal and close the left recesses 31 in the upper rails 29. Upon moving the left stack of pallets 2 upwards, on the bottom 25 pallets 2 n® left bevels 6 of the left support levers £

199 335 and by the pressure of the left support lever 6 opens so that it can pass between them. As soon as the bottom 25 of the lower pallet 2 of the left stack of mines of the left support lever 6 is pivoted, the left support levers 6 swing the pressure springs 2 towards each other so that their bent ends extend below the bottom 25 of the lower pallet 2 of the left stack.

The lift of the right stack of thumb 2 is only so large that the upper rollers 28 of the pallet 2, which hang on the upper rails 29 above the right stack of pallets 2, are raised so much that they cannot prevent the right closing plates 35 from spontaneously tilting. The recesses 32 of the upper rail 29 open for the passage of the upper rollers 28 of the pallet 2 'which is placed on the right stack of pallets 2 at most. Upon raising the right atoh of the pallets 2, the bottom 25 of the lower pallet 2 of the right stack moves away from the right support levers 2, which are then separated from each other by the action of the tension springs.

Upon completion of lifting both stacks 2 ^and 2 ^{, the} operation of both the left working roller 12 and the right working roller 19 reverses so that both stacks of pallets 2 descend.

During descent the left stack of pallets collected two upper rollers 28 ae, the highest ranked pallet 2 horizontally tilted for closing the left Deck 34 "so that the pallet ⁸⁶ hangs two upper rollers 28 of the upper rail 2 g. however, the left stack of pallets 2 decreases further until on day 25 of the lower pallet 2 abuts the left support levers 6, thereby stopping the drop of pallets 2 ^{in the} left stack. However, the left leg 17 of the left bracket 16 sinks further below the level of the lower rails 30.

As the right stack of pallets 2 descends, the upper rollers 28 of the top pallet 2 first pass the right-hand closing plates 35 vertically and pass through the right recesses 32 in the upper rails 29. The bottom 25 of the bottom right pallet 2 passes between the folded right support levers ²⁸ only the cam sockets 8 of the right support levers 2 grip the right support levers 2 ^towards each other, so that their curved ends engage under the bottom 25 of the right pallet 2 pallet 2 which is second from below and stops the right pallet stack 2. however, it sinks further until the lower rollers 33 of the lower rails 22 · ⁸⁸ rest on the lower right-hand pull pallet 2 from this right stack of pallets ²⁸ before the lower sliding member £ 1, which moves it by horizontal movement of the lower rollers 33 rails under the action of the lower working roller 37 under the left pallet stack 2.

At the same time, the upper working roller 36 and by means of the upper sliding member 39 incrementally move the pallet 2 suspended by means of the upper rollers 28 on the upper rails 29 in a manner already described.

Fill or empty any 2 1® ^Z pallet, let it be placed anywhere in tray 2, as all pallets 2 are easily accessible.

Claims (4)

Workpiece magazine for machine tools, in particular gearing machines, and workpiece pallets movable vertically and horizontally and stacked in two stacks, comprising a device for transferring workpieces from a stack of workpieces, characterized in that: the transfer and takeover device (44) for the workpieces is arranged between the stacks of pallets (3) · Container according to claim 1, characterized in that the workpiece transfer and takeover device (44) consists of a horizontal workpiece transfer device (45) and a vertical workpiece transfer device (46). A container according to claim 2, characterized in that the horizontal transfer means (45) consists of a gripper (50) and an opening in the horizontal movement direction of the pallet (3) which is fixed to the horizontal piston rod (49) of the horizontal work roll (48). Container according to Claims 2 and 3, characterized in that a centering device (47) is arranged between the horizontal transfer device (45) and the vertical transfer device (46).