DE3226731A1 - PALLET FOR CLAMPING WORKPIECES FOR MACHINE TOOLS - Google Patents

Description

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DIPL.-ING. WALTER KUBORN - T ~ DiPL.-PHYS. DR. PETER PALGEN DUSSELDORF

MULVANYSTRASSE 2 TELEPHONE 632727 KHElSSi ¹ ARKASSE DÜSSELDORF NO. 1014463 DEUTSCHE BANK AG., DÜSSELDORF 2 919207 POSTSCHECK ACCOUNT: COLOGNE 115211-504

Aioi Seiki Kabushiki Kaisha in Hyogoken (JAPAN).

Pallet for clamping workpieces for Machine tools.

The invention relates to a pallet for clamping workpieces for or at a Machine tool that is set / used on the machine tool table for a quick change of workpieces on the table to increase the performance of the machine tool .

In recent years, improving machine tool performance has received special attention and are equipped with the latest NC-controlled (numerically controlled) machine tools, such as machining centers especially in terms of both work performance and accuracy Improvements have been achieved steadily and quickly in processing with the progressive automation of the work process.

On the other hand, however, the workpiece change remains with the changes that have been made to this day Improvements are still time consuming. As a result, the ratio is that for changing the Workpieces required to complete the working hours steadily and rapidly growing in sharp In contrast to the actual processing time, which is usually drastically reduced. Now will believed or admitted that a major bottleneck for the desired improvement in job performance in the work of the machine tool.

Meanwhile, the acquisition costs for machine tools are noticeably in step with the growing speed and increased production capacity.

Since this is the case, the importance of drastically shortening the for the workpiece change at the workpiece machine table necessary time for the improvement of the overall work performance the machine tool has been recognized, so that the high production capacity fully for a desired Productivity improvement can be unfolded.

From the known state of the art, which is expediently observed in order to meet this request / Among other things, consider the workpiece pallet described in US Pat. No. 3,899,162 (see Fig. 43).

Their construction is described below.

In the base block 2o1 five pairs of hydraulic cylinders 2o2 are arranged, in each pair the cylinders face each other in the longitudinal direction (in the transverse direction in the drawing). Middle between the opposite pairs of hydraulic cylinders 2o2 is at a lower level in the longitudinal direction a positioning device is provided.

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In the case of the positioning device 2o3 there is an upwardly tapered or pointed block 2o4 guided by a pair of vertical guides 2o5 so as to be movable only vertically, and is pressed from bottom to top by a spring 2o6.

At the tip of a piston rod 2b7 of each hydraulic cylinder 2o2 is a positioning block 2o8 attached or attached. A clamping block 2o9 is rigidly arranged above this. the the front end surface of the positioning block 2o8 is finished into an inclined surface 21o, which comes into contact or in contact with the tapered block 2o4.

On the head side of the clamping block 2o9 is a depression or recess 212 for engaging a workpiece 211 is provided therein. The rear The wall surface of the recess 212 serves as a mounting surface 213. Both side walls thereof serve as right ones and left positioning surfaces 214.

The application and effects are described below.

First, the base block 2o1 is placed on the workpiece of the vertical machine tool and positioned both in the longitudinal direction and in the transverse direction prior to clamping.

Then the workpiece 211 is in the recesses 212 of each opposing pair of hydraulic cylinders 2o2 attached. The size of the recess is dimensioned in such a way / around the size of the workpiece 211 to record. Therefore, or consequently, the tool 211 comes when it is inserted or inserted into the depressions 212. is introduced, in contact or in contact with the two right and left positioning surfaces 214 to to be positioned in the transverse direction.

Then, when both hydraulic cylinders 2o2 are driven at the same time, the workpiece becomes 211 between the clamping surfaces 213 of the two clamping blocks 2o9 stretched.

The inclined surfaces 21o of the two positioning blocks 2o8 then come into contact or come into contact with the tapered block 2o4 on both sides thereof and are stopped after the tapered block 2o4 has been pushed down against the force of spring 2o6.

In this way, the longitudinal position of the workpiece 211 is inclined by the tapered block over both Surfaces 21o, both positioning blocks 2o8, both clamping blocks 2o9 and both clamping surfaces 213 certainly.

However, the construction has the following shortcomings and shortcomings.

(1) There is no support for positioning in both the longitudinal direction and the transverse direction on the machine workpiece table of the base block of the workpiece pallet with the result of a insufficient accuracy.

What is worse is that the positioning process required is time consuming and uneconomical.

(2) The workpiece clamping pallet is placed on the Workpiece table of the machine tool clamped when the workpieces are changed on it.

Therefore, the time required to change workpieces increases as the number of. captured workpieces. This means that the machine tool spends more hours changing workpieces and decrease the work efficiency thereof.

(3) For precise lateral positioning or positioning in the transverse direction of the workpiece 211 it is necessary to exactly match the width or size of the recess 212 of the clamping block 2o9 sized to exactly match the dimension of the workpiece 211 so as to perfectly match the

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to ensure both.

This means that a clamping block 2o9 is new must be made at any time if the width or size of the workpiece 211 changes, i.e. it is necessary at all times to close the clamping block 2o9 for a recess 214 of the same change that is sized to accommodate the size of a new workpiece and the new clamping block To bring 2o9 into an exact positional relationship with the positioning block 2o8.

This means that an increased or longer time is required to change the clamping block 2o9 that comes with the always long tool change time, to further reduce or reduce work performance.

It is worse that the working time of the machine tool with the growth of the workpiece change time is increased, which in turn deteriorates the Means work performance of the machine.

Moreover, it is quite expensive and also cumbersome or troublesome that for a large number of clamping blocks _r which are different in the size of the recess, must be made and must be stored according to the difference in the size of the workpieces included.

(4) At least two units of hydraulic cylinders 2o2 are required to produce a Clamp workpiece 211, which makes the construction of the pallet complicated and costly.

This also means an enlarged space required for the hydraulic cylinders 2o2 with the corresponding reduction in the space available for the workpieces

the consequence that the number of workpieces arranged on the workpiece table of the machine tool can be reduced in size. The required frequency of a workpiece change is increased and the efficiency of the workpiece change is affected. This is expressed in a Deterioration in the overall efficiency of the work of the machine tool.

(5) For positioning the workpiece 211, the positioning jig 2o3 and the positioning block are 2o8 additionally required. As a result, the construction of the workpiece pallet is excessive involved. This manifests itself in a further increase in manufacturing costs.

Because both positioning devices 2o3 and positioning blocks 2o8 are moving parts, there is an increased risk of errors in the longitudinal positioning of the workpiece 211, which manifests itself in a reduced accuracy of the longitudinal machining.

This defect or damage is aggravated by the progressive wear and tear moving parts connected. Therefore, the durability leaves something to be desired.

The invention overcomes all of these deficiencies or shortcomings of the cited prior art or type, which are listed above under (1) to (5).

A first aim of the invention is to shorten the time required for changing the workpieces the workpiece table of the machine tool required time to avoid the downtimes of the machine tool for the workpiece change as a prominent one

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Improvement of the overall work performance or the
Reduce overall efficiency, so that the
Features of modern machine tools, the large or high processing speed, the large or high processing capacity and the large or high volume are given.

To achieve this goal, the invention proposes a workpiece mounting pallet of a construction in which a large number of workpieces can be positioned with great accuracy along the X-axis and also along the Y-axis perpendicular thereto before they are attached
the attachment point on the workpiece clamping pallet. The workpiece clamping pallet itself can also "be positioned with great accuracy on the workpiece table both in the longitudinal direction and in the transverse direction.

The workpiece clamping pallet according to the invention is made up of a base block, a support beam and a majority of clamping devices.
composed, which are described in detail below.

The basic block is intended for the presence of attached and clamped workpieces and with a positioning means for positioning the same on the workpiece table both in the longitudinal direction as well as in the transverse direction, a fixing means for clamping on the workpiece table and a workpiece clamping surface for clamping workpieces on the base block.

Consequently, or therefore, the workpiece clamping pallet according to the invention with the positioning system easily and accurately both in the longitudinal direction as can also be positioned in the transverse direction on the workpiece table.

The support beam is on the workpiece mounting surface of the base block along the X axis. On both sides of the X-bar are across the X-axis facing the Y-axis positioning surfaces of which at least one for a workpiece unit is determined 'provided at a suitable distance along the X-axis'. Longitudinally at one end of the X-axis of each workpiece unit positioning surface is a protruding positioning stopper intended for positioning the workpiece along the X-axis.

Consequently, with the workpiece clamping pallet a large number of workpieces on the workpiece mounting surface of the base block can be set up easily and precisely by inserting each of them in Touching or in contact with each, a workpiece unit positioning surface of the support beam and the corresponding positioning stop both along the X-axis as well as along the Y-axis is brought into contact.

On the workpiece mounting surface of the base block each transverse jig is one workpiece adjustment gap of each one Workpiece unit positioning surface of the support beam arranged. Every jig is from an actual clamping unit, a clamping block and driven means formed or composed. The actual clamping unit is guided with the help of guide means to the workpiece mounting surface in both directions to be movable or displaceable along the Y-axis, and is also with a fastening means for Attachment to the attachment point. The driving means is through the actual clamping unit carried and drives the clamping block against or away from the workpiece positioning surface.

Each workpiece, which is located both along the X-axis and the Y-axis on the workpiece mounting surface of the base block is positioned, can in this way by the clamping block a each jig against the corresponding one Unit positioning surface of the support beam

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The workpiece clamping pallets according to the above Invention should at least two sets for alternate use on the workpiece table of the machine tool.

First, a large number of workpieces is clamped on one of the two sets and the loaded workpiece pallet is transferred to a workpiece table of the machine tool and, after positioning both in the longitudinal direction and in the transverse direction, using the positioning means provided, which can be done quickly and precisely the table is clamped with the help of the clamping system r which is also provided. The workpieces on the pallet are now ready for processing.

In the meantime, i.e. while the machine tool is at work, another large number of Workpieces positioned and on the other set of the clamping pallet in the workpiece changing station clamped for the next cycle of machining.

When the machining of the workpieces is past the previous workpiece clamping pallet, the another pallet stocked with a large number of new parts on the workpiece table in the Exchange with the finished pallet transferred and both in the longitudinal direction and in the Positioned transversely quickly and precisely before clamping on the table.

In this way it is sufficient to simply replace the preceding sentence with the later set of the workpiece clamping pallet which supposedly chore of positioning a large number of workpieces both along the To carry out the X-axis as well as along the Y-axis quickly and accurately. The workpiece can be done much faster to travel this way.

A second aim of the invention is to simplify the work, the positioning of workpieces both along the X-axis and along the Y-axis of the workpiece table with enlarged Speed and improved accuracy / in order to improve the accuracy of the machining as well as to improve the overall machining efficiency.

According to the invention, the workpieces can be along the X-axis as well as along the Y-axis on the base block of the pallet quickly with great accuracy by simply contacting with the two positioning surfaces and the opposite stopper. The basic block of the pallet itself can be easily and accurately on the workpiece table with the positioning system, both lengthways and be positioned in the transverse direction. Therefore, with the help of the workpiece clamping pallet of the invention with the positioning system of the base block, the workpiece mounting surface and the positioning stopper a large number of workpieces on the workpiece table easily with a large "Accuracy of both the longitudinal axis and the Y-axis can be set up.

A third object of the invention is to reduce the clearance created by the workpiece clamping system is claimed, to reduce the space that is available for the workpieces on the

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Workpiece mounting surface of the base block available to reduce the number of workpieces that can be ready for editing at a time. In addition, the frequency of the workpiece change should on the base block for the desired improvement in workpiece changing performance and also the frequency of the Change of workpiece mounting

pallets on the workpiece table for the desired improvement in the overall work performance of the machine tool be reduced.

While two sets of hydraulic cylinders for the clamping of a single workpiece are required in the tightened prior art technique, only one set of the jig is used in the pallet structure according to the invention, which is equivalent to a hydraulic cylinder or equivalent is _r and the supporting beams in place of the other set provided by hydraulic cylinders. Compared to the hydraulic cylinder, the support beam is much simpler in both constructions and designs. The device is also more compact. Therefore, the space occupied by the workpiece clamping system or equipment is considerably reduced, with the result that the space on the base block available for the workpieces is increased.

A fourth object of the invention is to reduce the manufacturing cost of the workpiece pallet.

By simplifying the construction of the equipment or the facility, both the equipment construction required for clamping the workpieces to the base block as well the necessary design of the equipment for positioning workpieces on the workpiece mounting surface of the base block both along the X-axis and along the Y-axis, so that the To make pallet more compact, and around at the same time

To improve the accuracy of the workpiece machining, as a result of the risk of the pallet becoming detached to reduce wear and tear and to improve or increase the frequency or service life thereof.

According to the invention, both the construction and the design of the equipment, which for the Workpiece clamping is required, made clearly easier by using the support beam than instead by the other set of the hydraulic cylinder in the known state of the attracted Technique, the size of the workpiece clamping pallet is also considerably reduced.

The construction of the equipment used for positioning is also greatly simplified of workpieces on the workpiece mounting surface of the base block, both along the X-axis and also longitudinally the Y-axis in the absence of a positioning device with the tapered block, the positioning blocks and the clamping blocks with the combined recess according to the entangled teaching known in the art. The equipment is merely through the workpiece positioning surface of the support beam and the positioning stoppers formed thereon.

In addition, the support beam is the workpiece positioning surface and the positioning stoppers as a whole are stationary or stationary parts that do not have any Are subject to movement. Therefore, there is a risk of deteriorating machining accuracy of the workpieces, which of the increased play between moving parts as a result of the advancing Wear and tear. For the same reason, the service life and durability of the workpiece mounting pallet are also deteriorating of the invention enlarged.

If the jigs continue are arranged symmetrically on both sides of the support beam / so that the workpiece unit positioning surfaces on both sides of the support beam symmetrically over the workpiece set are pressed, the support beam must withstand the resulting simple pressure. That's why the stress conditions or load conditions are remarkably mitigated. Therefore is it possible / to reduce the thickness along the Y-axis considerably with the result, that the space available for the workpieces is increased.

A fifth aim of the invention is to enable / that workpieces with in reasonable resp. tolerable limits of various sizes easily and precisely without replacement or renewal of the clamping block be spanned knowing what to do with the state of the art cited, and without any Risk of error in positioning the workpiece in the direction of the X-axis in order to avoid this to eliminate the shortcomings or errors of the known state of the art caused by the necessity originate or originate, the clamping block to each Time to replace when the size of the workpiece is changed, and specifically the time to change the workpieces lengthening with the result of lowering or reducing the performance of the workpiece change and regularly the overall work performance of the machine tool as well as increased costs due to the need manufacture many clamping blocks that are in size the recess for the workpiece engagement are different and require increased maintenance for care.

According to the invention, the workpiece is only at one end thereof along the X-axis by one individual positioning stopper positioned with free other end. Consequently or therefore is a exact positioning by the same positioning stopper

feasible along the X-axis, even if the workpiece size, i.e. its dimension along the X-axis is changed within reasonable or practicable limits. The positioned workpiece can be clamped by the same clamping block.

The drawing illustrates various exemplary embodiments of the invention.

Figs. 1 to 42 relate to the embodiments of the invention, while Fig. 43 relates to the showing based on the state of the art.

Figs. 1 to 29 deal with or relate to the main embodiment, while FIGS. 3o to 42 show different embodiments relating to the first to ninth alternative Relate embodiment.

Fig. 1 gives a plan view of a vertical machine tool and a pallet changing table of the invention again.

FIG. 2 is a side view of the embodiment shown in FIG. 1.

Fig. 3 shows a vertical side partial view, which a chassis or a drive shows a workpiece clamping pallet.

Fig. 4 is an illustration of an auxiliary table in vertical section along the line IV-IV in Fig.

Fig. 5 illustrates the partial view of a vertical section of the auxiliary table along the Line V-V in Fig. 1.

Fig. 6 shows a vertical partial view which shows a part of a jig and the Traction drive shows.

Fig. 7 is a vertical partial front view showing a portion of a drive mechanism.

Fig. 8 shows a vertical section, seen from the front, a part of the pallet bed or Pallet support again.

Pig. Fig. 9 is a partial vertical sectional view of a filing device.

Fig. 1o shows a pneumatic-hydraulic system diagram of the positioning or classification device and the clamping device.

Fig. 11 is a perspective view of the workpiece pallet and the auxiliary table. -

Fig. 12 is a plan view of the workpiece pallet.

13 shows an end view of the workpiece clamping pallet.

FIG. 14 shows an enlarged, vertical side part in elevation of essential parts of the workpiece clamping pallet recognize.

Fig. 15 is a partial vertical side view of a modified or modified support beam again.

FIG. 16 is a partial vertical front view showing part of the beam in FIG. 5.

17 illustrates a perspective partial view of a support beam.

Fig. 18. is a diagram of a hydropneumati see System of jig and hydraulic Pressure feed device for the workpiece clamping pallet.

Fig. 19 shows a vertical side view, which shows a part of a pull and push means for a modified Werkstückaufspannpalette.

Figure 2o is a partial perspective view of a modified support beam.

21 is a perspective view of a modified or different positioning stopper.

Fig. 22 is a partial plan view of the workpiece pallet again and shows the way of their application or use with an auxiliary work table and / or an auxiliary stopper.

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Figure 23 is a partial perspective view of a modified support beam.

Fig. 24 is a partial plan view of the workpiece pallet and shows the way or the way how this with a rotation preventing locking gap is used.

Fig. 25 shows a vertically cut partial side of the workpiece clamping pallet, which the way or the .Art shows in which the pallet with the Auxiliary clamping block is applied.

Fig. 26 is a plan view of a portion of the workpiece pallet; which the way or the way of application with a workpiece retainer shows.

FIG. 27 is a partial perspective view of a workpiece retainer of FIG. 26.

Fig. 28 gives part of a vertically sectional side view of necessary parts of Fig Workpiece clamping pallet again, softening the way or the type of use with a flat or flat workpiece retainer shows.

Fig. 29 is a partial front view of a holding plate of the flat work retainer.

3o to 32 relate to a first alternative embodiment, of which:

3o a vertically sectioned side view shows essential parts of a workpiece clamping pallet on an enlarged scale;

Fig. 31 is an illustration showing the loading conditions of the support beam;

Fig. 32 is an illustration showing the loading conditions on the support beam when the support beam is not reinforced.

Pig ·. 33 is a partial sectional side view of the jig in a second alternative Embodiment on an enlarged scale.

34 shows, on an enlarged scale, the vertically sectioned side view of the jig in a third alternative embodiment.

Fig. ' 35 gives a partial view on an enlarged scale again in the vertical section of the jig in a fourth alternative embodiment.

Fig. 36 shows, on an enlarged scale, a partial representation in vertical section of an alternative one Recognize embodiment.

37 illustrates, on an enlarged scale, a vertical side view of a jig in a sixth alternative embodiment.

38 shows an enlarged partial side view in vertical section of the jig in FIG a seventh alternative embodiment.

39 and 40 relate to an eighth alternative embodiment, of which:

39 is a partial side view of the jig 'on an enlarged scale and FIG

FIG. 4o shows a sectional view along the line A-A in FIG. 39.

Figs. 41 and 42 relate to a ninth alternative embodiment, of which:

41 is a perspective view of the work clamping pallet on a larger scale and

FIG. 42 is a front view of the embodiment shown in FIG. 41.

Fig. 43 is a vertical sectional side view of the jig of the workpiece pallet the fixed type, which is attracted as previously known.

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Figures 1 through 28, described below, show the preferred embodiment of the invention.

As shown in FIGS. 1 and 2, there is an NC (numerically controlled) vertical machine tool on the front side or front side thereof a rotating or rotating pallet exchange table 2 with gaps intended for two workpiece clamping pallets. The machine tool 1 has a fixed at its movable Table 4 attached auxiliary table 4A for positioning and clamping the workpiece clamping pallet 3 on it. The workpiece mounting pallets are interchangeable between the pallet exchange table 2 and the auxiliary table 4A.

At the workpiece changing station X on the pallet changing table 2, a large number of workpieces are positioned with great accuracy on one of the workpiece pallets and clamped at the fastening point with the aid of a clamping device 41. Hereinafter, respectively, then the pallet shuttle table 2 is rotated by a half turn (18o °) _t to bring the Werkstückaufspannpalette 3 to a workpiece pallet exchange station Y.

Then the workpiece clamping pallet 3 of the workpiece on clamping pallet changing station Y is transferred to the auxiliary table 4A, which is guided by a guide means 7 out and after stopping or stopping it with the aid of a stopper 8 by a pair of Positioning device 9 is positioned and then on the pallet bed 11 of the auxiliary table 4A with the help Securely clamped by hydraulic clamping devices will·

In this way, the individual workpieces are positioned on the workpiece clamping pallet 3 and this with consideration or towards the

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Table 4 opened with great speed. The single ones Workpieces 5 can be clamped against the table 4 with the same accuracy, as in each is described in more detail later.

With the workpiece clamping pallet 3, which is on in this way, ^ securely clamped on the auxiliary table 4A is, the machine tool 1 can be put into operation for machining.

While the machining is going on, the workpieces 5 with the other workpiece clamping pallet brought to changing station X.

After completing a machining cycle, the workpiece pallet 3 is placed on the auxiliary table 4A on the workpiece pallet changing station Y transfer. The pallet changing table 2 is rotated again by half a turn (180 °) to make the work clamping pallet 3 with the machined workpieces 5 to the workpiece change station X with simultaneous Pushing the workpiece clamping pallet with unprocessed Workpieces 5 in the workpiece changing station Y. The above process is for a consecutive Repeatedly changing the workpiece clamping pallets.

A brief description will now be given of the construction of the pallet changing table 2 and the auxiliary table 4A.

The pallet changing table 2 has a rotatable beam 26 on the base beam 2a, which is horizontal can rotate rotatably on casters 2 with a shaft 2c as a means.

Two running rails 12 and a guide rail 7 are arranged on the head plate of the rotatable frame 2b. Reference numeral 2e denotes a stopper, reference numeral 13 a rotation locking or rotation locking device. locking means, reference numeral 14 a rotary shaft and reference numeral 15 an electric motor, the is provided if necessary.

The auxiliary table 4A is constructed as a unit with various devices, one being Means is arranged on the rectangular base plate 16, which is fastened to the table 4 with bolts 1V is.

So are on the head plate 16 two, one on the left and the other on the right, running rails 18, one A pair of positioning means 9 on both sides thereof and, as far as possible therefrom, clamping means in six pairs, two pairs on the left and two on the right in the middle, pallet beds 11 on both (left and right) sides of each clamping device 1o, guide rails 7, which are in front of and after or after each central clamping means 1o and a pair of left and right stoppers 8, etc. are provided.

As can be seen from FIGS. 3 to 9, there are running wheels 19 for the workpiece clamping pallet three U-shaped profile pieces 23 provided, each of which has a roller 22 wears. The profile pieces 23 are freely adjustable vertically in grooves 21 with a square cross-section, which are formed in the underside of the base pallet block 2o. The U-shaped profile piece 23 is with With the help of a compression spring 24 (Fig. 7) pressed down, so that the tread portion of each swivel caster 22 protrudes only over the lower edge of the profile piece, which by holder 2 5 at both ends thereof is held (Figs. 3, 6 and 7).

As shown in Fig. 9, the positioning device 9 is composed of an air cylinder and can or is able to move the pallet base block 2o with great accuracy with a piston or Position plug 27 of the front end part

or the front end portion of the piston rod 26 which is fixed in a mating hole 28 in the underside thereof. When the pneumatic pressure is supplied through the working side opening 29 for the plug 27 to fix it in the appropriate hole 28, the working side opening 29 is connected to a detection or locking side opening 3o for the pneumatic pressure to this the detection side opening forwarded to 3o and to define the slug or plug 27 (in the matching holes 28) r which is indicated in this case ₇ as will be described in detail below.

As mentioned above, if the workpiece clamping pallet from the workpiece pallet changing station Y the auxiliary table 4A is pushed, the guide rails 7 in the guide grooves 31 in the bottom of the base block 2o for relative sliding therein and the base block 2o here guided to free from a Slide to the side to be. In addition, each tension arm 1oa has a relative movement in the fastening means 32, which is formed as a cross-sectionally T-shaped groove in the underside of the base block 2o. After positioning the base block 2o with the aid of the positioning device 9, hydraulic oil is the Hydraulic oil chamber "lob fed to the jig 1o, to press the tensioning arm 1oa downwards and with the resulting pressure of the compression spring 24 the movement device 19 to press down. The tread of each caster 22 is retracted to to align with the bottom of the base block 2o and the base block 2o, and then on the pallet bed 11 stretched.

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At this point compressed or compressed air is used to flow out from the air outlets 23 on the head side of each Pallet bed 11 brought to blow away any foreign body on the pallet bed 11 or from this blow down to prevent foreign objects from attacking to prevent and at the same time actuation of a tight contact or such Contact of the underside of the base block 2o with the .Kopfseite of the pallet bed 11 through the display the increase in pneumatic pressure in the To enable or to obtain feed channel 34 for the compressed air.

In Fig. 1o is the hydraulic / pneumatic circuit for the devices in / on the auxiliary table 4A.

Compressed air or compressed air is pneumatically driven from a compressed air source 35 Hydraulic pump 36 supplied to generate a hydraulic pressure that the jig 1o is forwarded. At the same time, the compressed air goes to the positioning device 9 and the air outlets 13 of each pallet bed 11 is directed.

The arrangement is such that if the Plug 27 of the positioning device 9 engages in the corresponding or matching perforation 28 which compressed air is supplied to the detection side port for a pneumatic pressure control lamp 27 to be made to light up.

Since the pneumatic pressure in a duct 38 that feeds compressed air increases when the base block 2o is in the If there is tight contact with the pallet bed on the underside, the condition or the state is established with the help of a Pressure switch 39 detected. The resulting signal

is transmitted to one controlled by pneumatic pressure Light up the control lamp (not shown).

Because the pneumatic pressure in a compressed air feed Channel 36 rises when the base block is in tight contact with the Pallet bed 11 darung comes, the condition or the state determined with the help of a pressure switch 39 and the resulting signal is transmitted to the confirmation lamp (not shown) to light up for the contact.

The workpiece mounting pallet is described in detail with reference to FIGS. 11 to 29.

The work piece on Spannpal ot 1 c 3 j.st r (ii vi-i 1 lk.ili. · Machine tools 1 intended and is. from dom Rar. ir.-block 2O / the support beam 4o and a majority of clamping devices 41 formed.

The base block 2o is a rectangular, thick one Steel plate with longer sides and the head sides form a flat workpiece mounting surface 42.

As shown in Figs. 11 and 12, the X-axis in the lateral or transverse direction and the Y-Z- ^ axis taken in the longitudinal direction and the Z-axis is vertical to the center of the workpiece mounting surface 42 of the base block 2o taken as a starting point.

The support beam 4o is made of one in cross section square steel bar and attached to the workpiece mounting surface 42 with nine fastening bolts 53 along the X-axis.

The support plate or the support bar 4o has its two sides opposite to the Y-axis, which each form a workpiece positioning surface 44 and are arranged parallel to each workpiece positioning surface 44 across a workpiece adapter space 4 5, where a clamping beam 41A is provided, which is provided on the workpiece clamping surface 42 is mounted displaceably in the longitudinal direction, ie along the Y-axis. Each Aufspannbalken 41A is equipped with nine sets of clamping devices which have pitch in a same size so that each workpiece can be held by each mounting block 5. 4 6 against the Werkstückpositionierfläche 44th

So that a large number of the same workpieces 5 at the same distance on the workpiece mounting surface can be positioned and with the help of the jigs 41 against each other the workpiece positioning surface 4 4 can be clamped, each workpiece positioning surface 44 is in nine sections or equally divided surfaces 44a positioning a workpiece unit. At the same time is on the position of those of each workpiece along the X axis, a positioning stop 47 at one end of the positioning unit Area 44A provided to over the position iorf lache 44a to protrude from the workpiece unit.

As shown in FIG. 17, the positioning stopper 47 is designed like a portal and can be removed or removed. releasably inserted or fastened from above into the attachment groove 4S for the stopper in the head side of the support beam and if necessary, for example, fixed in the groove with the aid of a screw 49.

Since a large number of workpieces 5 are positioned or arranged and clamped onto the base block 2o the positioning of each workpiece 5 can be carried out both along the X-axis and along the Y-axis can be effectively made with ease by having one side of each workpiece 5 in contact or in Brought into contact with the surface 44a positioning the corresponding workpiece unit and to the same ' Time or at the same time the other side against the X-axis, for example the right side of it in Contact or in contact with the corresponding positioning stopper 4 7 is brought.

The position or position of each workpiece 5 along the Z-axis can be adjusted with the aid of a height adjuster determined on the workpiece mounting surface in the

Workpiece adjustment space 4 5 is attached (see Fig. 14).

If the workpiece 5 to be clamped is longer than the workpiece tightness clamping surface 44a, then it will be positioned afterwards and extend over a majority of workpiece positioning surfaces, with an appropriate number of positioning stops if necessary 4 7 is removed and the clamping is carried out by using a corresponding number of clamping devices 41.

In this way, both smaller workpieces 5 and larger and longer workpieces can be carried with them Over the entire size of the base block 2o extending length properly or correctly positioned and stretched will.

If, as mentioned above, the clamping beams 41A on both sides of the support beam 4o for clamping the workpieces 5 are arranged on both sides of the support beam 4 _O and are parallel to the support beam in order to clamp the workpieces on both sides of the support beam 4o, the support beam 4o is only pushing Subjected to forces in the direction of the Y-axis. As a result, the stresses are largely relieved compared to those when the workpieces 5 are clamped, only on one side of the support beam 4o. As a result, the support beam 4o can be made thinner in the Y-axis direction and the workpiece fitting clearances 45 can be enlarged in this way.

If the workpiece clamping pallet 3 is used, it is repeatably possible that the workpieces 5 can be arranged asymmetrically on both of the piece beam due to a misunderstanding and for security To secure against deformation or warping of the support beam 4o in just such a case, it is It is advisable to have a support beam 4o attached to the base block as shown in Fig. is shown.

For this purpose, a suitable recess or Groove 52 in the workpiece mounting surface along the X-axis can be provided for the engagement of the bottom part 51 of the support beam, which is then removable can be secured to the base block 2o with the aid of fastening bolts 53.

When the support beam 4o is detachably attached to the workpiece mounting surface 4 2 in this way, it is also possible to use the support beam or the support strip 4o on both sides of the base block 2o To move the clamping of larger workpieces. (See the first alternate embodiment).

However, if the intention is to clamp only relatively small workpieces 5, the support beam 4o can also be permanently attached to the base block 2o, for example by welding.

On the other hand, if the intention is to clamp large and extensive or wide workpieces 5 exists, the support beam 4o can also be permanently attached to the base block 2o and oecien both sides of it can be moved. In such a case, however, the support beam 4o must be designed in such a way that that it is sufficiently solid to with the jigs arranged on only one side To be able to be subjected to stress conditions.

As shown in FIGS. 15 and 16, the workpiece mounting surface 42 can be freely adjusted along the with the aid of fastening bolts 53a Y-axis be attached.

In Figs. 11, 12, 14, 18 and 19 is the jig 41 shown in detail.

The jig 41 can be of any design or design, if it is able to do each Workpiece 5 to be clamped against the workpiece positioning surface 4 4 of the support beam 4o. Any real Clamping unit itself can be provided independently. But it must in this embodiment

actual clamping units of the clamping devices 41 connected and housed in a single clamping beam 4TA.

In the preferred embodiment, each clamping beam 41A is on workpiece mounting surface 42 on both sides of the support beam 4o and parallel to this along the X-axis transversely to the workpiece adjustment gap 45 arranged. While the width of the gap matching the workpiece is 4 5 of the size of a workpiece 5 must be adjusted accordingly / is each clamping beam 41A on the workpiece Clamping surface 42 with the help of fasteners 55, 56, 57, with their freely adjustable along the Y-axis Fixed position.

As can be seen from FIG. 12, there are ten in the workpiece mounting surface 42 which are T-shaped in cross section Grooves parallel to the Y-axis are provided, extending from both. Front edges and back edges of it Extend up to the vicinity of the support beam 4o at an equal distance and serve as a guide means.

Each clamping beam 41A is on the work surface 42 on the cross-sectional T-shaped grooves 55 by screwing each fastening bolt 56 with the lower end portion thereof into the appropriate one T-nut 57 attached, which is freely slidable in each T-shaped groove 55.

To adjust the position of the clamping beam 41A, the clamping beam 41A is manually with the fastening bolt 56 loosened, moved into the desired position and the fastening bolts 56 are tightened again or tensioned with the clamp .

For the arrangement shown in FIG. 19, a longitudinally movable or displaceable means can be provided for the clamping beam 41A, the consists of a threaded or screw rod 58 which goes through the T-nut 57a, so that the latter moves back and forth in the T-slot 55 when the screw rod is rotated.

In the case of a large clamping beam 41A, one large workpiece clamping pallet 3 can be a hydraulic cylinder instead of the screw rod 58 as a displacement means in the longitudinal direction for the T-nut 57a or a clamping beam 41A itself can be used.

The jig block 46 of each jig 41 is opposite to the corresponding workpiece unit positioning surface 44a and 44a is driven back and forth "with the aid of clamping means 59.

As a clamping means 59 is preferred in this Embodiment a single-acting hydraulic cylinder 59a with return spring, which is laterally in the Clamping beam 4ΊΑ housed or installed and is connected to the end of the piston rod 6oa as an exit member 6o with the clamping block '46.

Preferably, the clamping block 46 with the Outlet member 6o be connected to a universal connection or a universal joint.

For this purpose, the back of each clamping block 46 can be used as a contact surface in the form of a partial spherical surface 62 be formed. This can be brought into contact with the end of the piston rod 6oa, which is designed as a hollow spherical seat 61. A connecting bolt 6 3 can be used to connect to it.

'; r

To prevent the penetration of chips or waste into a possible gap between the part spherical To secure contact surface 62 and the hollow ball seat 61, is an annular elastic body 64 between the head of the connecting bolt 63 and the clamping block 46 inserted to keep the latter against the piston rod 6oa to press.

An "O" ring made of rubber and a compression spring or the like can preferably be used as the elastic body 64 can be applied.

In order to secure against lifting of the workpiece 5 and this securely against the workpiece mounting surface 4 2 to push, the hydraulic cylinder 59a is mounted with its axis inclined so that its piston rod 6oa is inclined downward towards the end by about 4 ° to give a downward component.

When hydraulic oil in an oil chamber 6 5 of the hydraulic cylinder 59a is left for the forward stroke, the piston 6ob is driven against the clamping direction. if the oil chamber 65 is released from hydraulic pressure, the Piston 6ob brought back by the pressure of a spring 6 7, which is accommodated as a load in a return stroke 66

The 'forward stroke oil spaces 65 of the individual fixtures 41 are connected by the oil channel 68 which is provided in the clamping beam 41 to pass therethrough. The hydraulic pressure is supplied by a hydraulic supply device 7o, which is described below is.

After clamping a majority of workpieces 5 on the workpiece clamping pallet 3, which are on the pallet changing table. 2 is arranged, with the help of the hydraulic Clamping device 41 becomes the workpiece clamping pallet 3 transferred to the movable table of the machine tool 1, the oil channel 68 being through a shut-off valve 69 at the end is closed to him from the hydraulic

Separate pressure to be fed source 7o.

As shown in Fig. 18, the outlet port 72 of a hydraulic pump 71 from the hydraulic pressure supply line 7o to the hydraulic oil inlet and outlet 73 of the workpiece clamping pallet 3 through a Connect hydraulic hose 74.

The Eiri outlet port 73 is as a connection the self-sealing coupling design 73A and as a non-leaking reversible shut-off valve 69 formed, which is installed in the oil path 68 downstream of the hydraulic oil inlet outlet opening 73, so that the oil path 68 can be switched between feed and discharge.

The check valve 69 has a built-in check valve to shut off the hydraulic oil flow so fully operational.

The device 7o supplying the hydraulic pressure reduces the pneumatic pressure from an air source 75 optionally or alternatively with the aid of one of the three reduction valves 76a, 76b and 76c to different pressure levels. The reduced pneumatic pressure is fed to the hydraulic pump 71 for a hydraulic pressure (of, for example, 50, 100 or 25o kg / cm ² G) in accordance with the pneumatic pressure to be generated. This is done for the precise setting of the clamping force of the clamping device 41 in accordance with the material, the design and construction of the workpiece 5.

This also makes it possible to first provisionally the workpieces by supplying relatively low hydraulic pressure to the clamping devices 41 for precise positioning of each workpiece 5 clamp and then clamp each workpiece 5 by switching to a higher hydraulic pressure.

A single unit of a reducing valve of various types or a control device can instead the reducing valves 76a, 76b and 76c can be used.

Then the self-sealing coupling 73A is released and the workpiece pallet 3 on the auxiliary table 4A transferred in order to be clamped onto the clamping pallet 3 for the machining of the workpieces 5 will.

To protect against a drop in hydraulic pressure in the hydraulic pressure system of the workpiece mounting pallet 3 there is both a spring-loaded accumulator 77 in the base block 2o and an actuator

78 is provided for detecting an abnormal drop in hydraulic pressure. Here is the arrangement so made that if an abnormal drop in hydraulic pressure occurs, this is caused by a limit switch

79 is established or determined on the side of the table 4 , which is triggered here.

This arrangement aims to exclude the fluctuation of the hydraulic pressure with the aid of the spring-loaded Accumulator, which may fluctuate as the temperature of the Hydraulic oil and the resulting expansion or contraction thereof over time between the Clamping the workpieces 5 and the completion of which processing is caused.

In addition to the hydraulic oil supplying means, there are a number of suitable means.

For example, it is also possible to use the workpiece clamping pallet 3 with a small hydraulic pump and an oil tank of suitable or suitable capacity or optionally equipped with a small servo motor or auxiliary motor. It is also possible to use a motor-driven one

Hydraulic pump as part of the hydraulic pressure feeding device 7o of the pallet changing table 2 instead of the pneumatically driven hydraulic pump to use.

In addition, when the actual clamping unit 41a of each clamping device 41 is independent is provided, it is of course necessary to adjust the hydraulic pressure to each jig 41 independently to be supplied, an intricate composition of the oil path 68 being inevitable.

In connection with FIGS. 2o to 28, the various attachments are detailed below which are used in connection with the invention.

As can be seen from Figure 2o, vertical stoppers which engage grooves 48a are one at each end each workpiece unit positioning surface 44a of the support beam 4ob for releasable engagement portal-shaped positioning stopper 4 4a provided, portal-shaped positioning stopper 44a provided. As shown in Fig. 21 and 22, it is possible to each work piece a positioning surface 47A of the add portal-shaped positioning stoppers 4 7a, in order to enable the position of the workpiece 5 along the X-axis to be set precisely.

As can be seen from FIG. 23, it is also possible to position stoppers 4 7c in suitable passage openings 48b insert horizontally one above the other in the support beam 4oc on the edge between two adjacent units of workpieces positioning surfaces 44a .mit end parts to be provided, which with their sides protrude to serve as workpiece positioning surfaces 4 7A to serve.

= 39-

As shown in FIG. 24, it is further possible to insert an anti-rotation plate 80 which extends over a plurality of clamping blocks 46 between these and the workpieces 5. However, for this rotation-preventing plate 80, the clamping blocks 46 are subjected to a rotation during machining in order to bring about a rotary displacement of the workpieces 5. Such a rotational displacement can be completely prevented if the rotation-locking plate 80 is used so that it is clamped at a majority of points and these are never drvhon at the same time, since the rotation of the clamping blocks 46 is locked.

It is recommended to use the anti-rotation plate 80 as a thin strip of metal that extends the length of each clamping beam 41A extends.

As shown in Figs. 22 and 25, the stroke of the hydraulic cylinder 59a is the jig very limited. To compensate for this and also the use of a larger clamping block 46 accordingly the. The size and design of the workpiece 5 to enable it to be effectively clamped can be an auxiliary task Clamping block 81 can be removably attached to the clamping block 46 in order to clamp the workpiece 5 thereon .

In the embodiment shown, the auxiliary clamping block 81 is designed so that it can easily be attached to the Clamping block 46 can be attached by merely inserting the latter into the appropriate recess 82. To secure against falling out or falling is a effective friction locking means such as an "O" ring 83 intended.

It is also possible / on the auxiliary clamping block 81 another, even larger, auxiliary clamping block to attach.

In the embodiment shown in FIGS. 26 and 27, there is a workpiece retainer 84 for retaining cylindrical workpieces 5 arranged in each workpiece adapter space 45 so as to Arranging the cylindrical workpieces 5 in the workpiece adapter space 85 to facilitate.

When the workpiece retainer 84 is clamped with the aid of the clamping device 41 / becomes one slot or gap equal deformation compensating distance 86 for the cylindrical workpieces 5 reduced / so that they are stretched over the retainer 84.

The workpiece retainer 84 and workpiece are on a high adjuster 87 at the desired position Elevation mirror set.

While it is necessary / to change the workpiece retainer 84 when larger workpieces 5 are clamped are, however / if the workpieces 5, which are to be clamped / are smaller, each Workpiece 5 can be inserted into a hollow cylinder on the corresponding side (not shown) before it is introduced into the workpiece retainer 84 / in order to be clamped over this.

As shown in Figs. 28 and 29, thin flat workpieces 5 are made using a flat one Workpiece retainer 88 clamped.

The construction is made so / that the workpiece 5 to the bearing or support surfaces 89 with attached to its sides, which is retained by retaining ends 9o / one of which with the aid of the support beam 4o held and the other end with the help of the clamping block 46 of the clamping device

is pressed. The workpiece 5 is securely clamped when a retaining block 9o against the other driven and at the same time the workpiece 5 pushed down "or pressed, if it is through the downward Component that is generated by the clamping force, is to be transported or lifted.

A space 92 provided under the workpiece 5 is preferred for this, around a tube through the workpiece, the space 92 serving as a chip or chip collection space.

The retaining block 91 whose upper end part the
The aforesaid retaining end is formed continuously in the lower part and is spaced in the upper part thereof, the better at the
to be able to adapt to different workpieces 5.

The following are a number of partial changes of the preferred embodiment.

I. Figs. 30 and 32 show a first modification.

If a large workpiece 5 is to be clamped, the support beam 4o is in the longitudinal direction (along the Y-axis) for example against the rear edge
the workpiece storage area 42 of the base block 2o
shifted, and the clamping beam 41A is attached to the front side across an enlarged workpiece adapting space of the support beam 4o,
while the clamping beam 41A on the rear
Page tightly fixed by the support beam 4o
without any workpiece adjustment gap 4 5
in between, both at the attachment point on the
Workpiece mounting surface 42 are attached. The jig blocks 46 protruding outward from the jig 41A come into contact
brought with the opposite, a workpiece unit positioning surfaces 44a of the support beam 4o,

so that they are safely stored against the clamping force that acts on the workpiece 5.

The workpieces 5 / the front or front of the support beam 4o are then arranged with the aid of the jigs 41 on or in the front clamping beam 41A with the one Workpiece unit positioning surfaces 44a of the support beam 4o spanned by the rear row of jigs 41, as mentioned above, is held.

Since with this change of the support beam 4o by the jigs in the rear Row is behind it, it is pressed symmetrically from both sides, the front and the back, so that its deformation or deformation in the direction of the Y-axis is prevented and the position of the support beam 4o with respect to the coordinate system for the workpiece mounting surface 4 2 exactly maintained becomes, (see Fig. 31)

When the support beam 4o on the rear side by the jigs 41 in the back row, As shown in Fig. 32, is not deposited, the support beam 4o is deformed too much backwards or deformed with the result that a change in the position of each workpiece 5 in the coordinate system the machining accuracy of the workpiece 5 influences.

II. Fig. 33 shows a second modification. In this modification, there is a jig 41 from a single-acting hydraulic cylinder with return or return spring 59b. A Tensioning member 46a is through a mating hole one Piston 6oc inserted as an outlet member. An actuating means 6od is at the outer end of the clamping member 46a intended.

With the help of a compression spring, the piston 6oc is moved in the direction of the side that reduces the tension. respectively. pressed against the relief side of the clamping and retained by the spring 67a in the event of rotation.

When the workpiece 5 is on the workpiece clamping pallet 3 is to be clamped, the arrangement is designed so that the actuating means 6od by hand manipulated for clamping and positioning the workpiece. Then hydraulic oil is in the Forward stroke oil chamber 65a initiated for clamping with the aid of the hydraulic pressure.

The jig 41 is in this modification capable of freely clamping both large and small workpieces 5, with a very small stroke of the hydraulic cylinder 59b is indicative or characteristic.

The clamping means 59 can also be used as clamping means are used, which consist of a clamping member 46a operating with a screw, without supplying hydraulic oil to the hydraulic cylinder 49b. In this case, however, is a more powerful one Retention of the piston 6oc against rotation is required.

III. A third modification is shown in FIG.

In this modification, a piston 6oe of the clamping means 59 of the clamping device 41 is against the clamping side with the help of a blunt Seheibon compression spring 93 pressed, which in an oil chamber 6 5b for the forward stroke of a double-acting hydraulic cylinder 59c is arranged.

The spring force of the frustoconical compression spring washer 93 is as strong as, for example

up to 5oo kg to 1ooo kg f, so that this spring force is used for an experimental clamping of the workpiece and together with the hydraulic power, also for that Clamping the workpiece 5 can be used.

If the workpieces 5 are to be attached to the workpiece changing station X on the pallet changing table 2, with the modification it is possible to bring the clamping block 46 into contact or contact with the workpiece 5 and with the hydraulic pressure that controls the return oil chamber 66b is supplied to cause the retraction of the piston 6oe, and then to separate the workpiece clamping pallet 3 from the device to be supplied with the hydraulic pressure in order to release the hydraulic pressure for a trial clamping of the workpiece 5 , which is carried out with the aid of the conical disc spring 93.

After the workpiece 5 has been properly positioned in the state of the experimental clamping, the workpiece clamping pallet 3 is transferred to the rear table 4A of the machine tool 1 in order to be clamped or clamped thereon. Then or thereafter, the hydraulic hose from the device (not shown) for the supply of the hydraulic pressure with the inlet / outlet opening for the hydraulic oil on the side of the machine tool 1 (which with the oil chamber 6 5e of the hydraulic cylinder 59c for the - forward stroke is connected) and a hydraulic pressure of, for example, 25okg / cm ² G is fed to the oil chamber 65b for the forward stroke of the hydraulic cylinder 59c for clamping the workpiece 5.

It is then also possible to adjust the clamping force at the execution of the tentative clamping by adjusting the hydraulic pressure that corresponds to the oil chamber of the

μ,

Return stroke is supplied to set properly.

If the clamping device 4] is used, the workpiece clamping pallet 3 can be separated with the hydraulic hose removed or released, without providing the non-leaking or non-dripping shut-off valve of the reversible design (Fig. 18). In addition, after being reconnected to the hydraulic pressure supplying device after being clamped on the auxiliary table 4Ά, there is no risk of any trouble such as hydraulic pressure loss or normal drop in hydraulic pressure.

IV. Fig. 35 shows a fourth modification.

The jig 41 makes use of this change in a spring force alone for clamping and hydraulic force for unclamping.

A powerful conical compression spring is used for this To mount 93a in a forward stroke space 65c of a hydraulic cylinder 59d of the clamping means 59, around a piston 6of against the clamping side to press.

When the workpieces 5 are attached to the workpiece changing station X, the clamping blocks 46 applied to the workpieces 5 with hydraulic pressure, which is an oil chamber 66c for a return stroke is supplied to compress the conical disc spring 93> as is the case with the third change above, and becomes the hydraulic pressure for the workpieces 5 drained to be powerful by the force of the conical disk spring 93a to be stretched. Then the workpiece pallet 3 is placed on the auxiliary table 4A of the machine tool 1 transferred and then stretched. the

Workpieces 5 are now ready for processing in the complete absence of hydraulic pressure.

V. A fifth modification is shown in FIG.

The jig 41 is changed in this Embodiment of the so-called sliding wedge type in which a clamping block 4 6b of Hand over a force multiplier or a such a device 94 for clamping is actuated in order to carry out the clamping.

A support beam 4od is on the workpiece mounting surface 4 2 in a free position, which is secured by screwing its two clamping bolts 54b in a matching T-nut 53c is adjustable, which is arranged in the cross-sectionally T-shaped groove 55 in the base block 2o. The independent clamping unit proper 41a each jig 41 is too much secured in its place of attachment when the mounting bolt 56a is screwed into a T-lock nut 57a will. However, it is also possible to use the device as a structured clamping system in the form of a Clamping beam in the case of the preferred embodiment to build.

A clamping bolt 97 as an ejector member 6o of the Clamping means 59 is loose by a suitable or suitable opening 98 is inserted in a clamping block 46b and its head 99 is inserted through the clamping block 46b_ withheld. Its lower end part is screwed into a T-groove 57a.

An inclined drive surface 96 of the clamping block 46b is in planar contact with a correspondingly inclined driving counter surface of the actual jig 41a through the

»Λ Λ

Effect of a spring 1οο brought and is arranged so that the clamping block 46b against the or away from the support beam 4oa by means of a clamping bolt 97 with the force multiplier mechanism is driven or moved, which is formed by two opposing surfaces.

The upper end of the spring 1oo is horizontally displaceable against the side of the support beam 4od attached so that the restoring force has the effect has to press the clamping block 46b against the inclined driving surface 95.

The clamping bolt 97 is used to drive or moving the clamping block 46b by tightening or pulling up the T-nut 57a. At the same time, the jig proper 41a is set.

VI. A sixth embodiment is shown in FIG. 37.

The jig 41 is in this modification Another partial modification of one of the five modifications described above.

The actual clamping unit 41a is only provided by the securing bolt 56a or by this bolt alone and attached the threaded part of a clamping bolt 97a of the clamping means 59, which is screwed into the actual clamping unit 41a will. A compression spring 1ooa is for pushing or tightening the clamping block 46b related to the inclined driver surface 95.

The jigs shown in the fifth and sixth amendments are of a type in which each jig is hand driven or is operated to the clamping

cause. They are especially useful for box-shaped workpiece pallets suitable and intended for horizontal machine tools.

VII. In Fig. 38 a seventh modification is shown.

The jig 41 in this arrangement is different von''der sixth preceding arrangement is _/ that a hydraulic cylinder 59e is used as a chuck 59th

The arrangement is so around the chuck block 46b through the exhaust member To drive 6o of the vertical hydraulic cylinder 59e, which is in a steady or continuous clamping beam 41b is formed, which is formed as the actual clamping unit. Reference numeral 68a denotes an oil path and the reference numeral 6 7b a return or return spring.

HX. Figs. 38 and 39 are reproduced to show an eighth change.

With this change is the jig similar or identical to the one change described in the seventh amendment. This is a continuous one Clamping beam 41C with the aid of two fastening bolts 56b and a hydraulic cylinder 59f provided as workpiece clamping means 59, around the first ejector member 6og and the second ejector member 6oh to drive down so that a clamping block 46c against the support beam with the help of a Force multiplication mechanism 94a is operated, which consists of an inclined driving surface 95a and a inclined drive surface 96a consists.

Since the clamping block 46c is driven to sliding on the inclined bearing surface 1o1 also creates a downward component, which the workpiece 5 acts pressing down.

As shown in Fig. 4o, the clamping block is secured against the second by a pair of means 1o2 Ejector 6ob pressed. However, it can just as well be engaged with the second ejector member 6ob by means of consist of a dovetail groove.

This modified jig 41, in which any slide in contact without 'anyone There is a gap, is free from the ingress of chips and is characterized by excellent durability or service life.

TX. A ninth modification is shown in Figs.

A workpiece pallet 3A is with this one Modification box-like and intended for horizontal machine tools. The base block 2oa is a box-like, rectangular parallelepiped body, made of steel with workpiece mounting surfaces 42 provided on the four sides thereof.

With the center of each work surface 42a as the origin, there are the X, Y, and Z axes set as it is illustrated. On every workpiece clamping surface 4 2a, a support beam 4oe is attached along the X-axis, the position of which is freely adjustable in the direction of the Y-axis. At both Sides of it and parallel to it, an upper and a lower clamping beam 4 1D are attached, which in ihvnn Positions are freely adjustable again.

Each jig 41D has four sets of hydraulic jigs on, of which each with a clamping block 46 for clamping the workpieces 5 against the corresponding tool unit having positioning surface 44a.

With the support beam 4oe removed in its entirety and clamping beam 41D can handle larger workpieces With the help of bolts, etc., which are arranged in T-nuts in a cross-sectionally T-shaped groove 55a.

It is also possible as a jig 4 a To use a jig of the 'sliding wedge type, the is provided in the fifth to seventh above-described change. Here are those of the manually operated Design particularly preferred.

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Claims (1)

PATENT ATTORNEYS .I. '.. * * ..' ί ''. * 4Γϊί U SSE LD O R F, ^the 07/09/19 "2 DIPL.-ING. WALTER KUBORN K./ra. DIPL.-PHYS. DR. PETER PALGEN DUSSELDORF MVLVANYSTRASSE 2 TELEPHONE 632727 KBEISSI'ARKASSE DÜSSELDORF NO. 1014 403 DEUTSCHE BANK AG., DÜSSELDORF 2919207 POST CHECK ACCOUNT: COLOGNE 115211-504 Aioi Seiki Kabushiki Kaisha in Hyogoken (JAPAN). Claims. (1st / workpiece clamping pallet for machine tools consisting of a base block, a support beam and a majority of jigs / characterized by the following features: the base block can have one or more workpieces to be clamped thereon and has or thereon Positioning means arranged therein for positioning thereon in the longitudinal direction and opposite in the transverse direction a table of the machine tool, wherein a clamping means for clamping the base block on the A table and a workpiece mounting surface are provided, to have the workpieces clamped to it; the support beam is clamped on the workpiece mounting surface of the base block along its X-axis and the surface positioning the workpiece unit is at least a suitable distance apart ψ · a - 'J - one of the two sides is formed at right angles across the Y-axis, one end of each through a protruding positioning stopper is designed to position each workpiece along the X-axis; Each clamping device is arranged on the workpiece clamping surface of the base block transversely to a workpiece adapting space of each or on each surface of the support beam that positions a workpiece unit, and each clamping device is of an actual clamping unit, which is guided by guide means, xm its position in both directions longitudinally to make the Y-axis adjustable, formed and attached in place with the help of fastening means, wherein a clamping block is arranged opposite a, the workpiece unit-positioning surface of the support beam and is so built in or installed as a clamping means in the actual jig to the To press the clamping block against and away from the surface positioning the workpiece unit. 2. workpiece clamping pallet according to claim 1, characterized in that the base block is a workpiece pallet, which is intended for a vertical machine tool, made of a rectangular, thick steel plate exists and has a workpiece mounting surface, which is formed on it. 3. Workpiece clamping pallet according to claim T _7, characterized in that the base block forms a workpiece clamping pallet which is intended for a horizontal machine tool and which is made of steel as a box-like rectangular parallelepiped body and has one or more workpiece mounting surfaces on the left and right. 4. workpiece clamping pallet according to claim 1, characterized in that a majority of workpiece positioning surfaces at a suitable distance along the X-axis of either side of the Support beam are formed and that each jig with respect to a workpiece positioning n ächc is arranged on both sides of the support beam. 5. workpiece clamping pallet according to claim 4, characterized in that each jig thinks with the aid of each workpiece positioning surface is arranged on one side of the support beam without the workpiece compensating gap therebetween and each workpiece unit positioning surface through the chuck of each Clamping device, is immediately behind. 6. workpiece clamping pallet according to claim 1, characterized in / that the fastening means of the base block by a plurality of T-shaped cross-sectional grooves along the Y-axis on the underside is formed from it. 7. workpiece clamping pallet according to claim 1, characterized in that a movable or displaceable means for transferring the base plate on the machine tool table is formed by a majority of sliding rollers attached to the bottom of the base block are attached. ΰ . Workpiece clamping pallet according to claim 1, characterized in that an engagement means is provided along the X-axis on the base or the root of the support beam and engages in a matching groove which extends along the X-axis and is provided on the workpiece mounting surface of the base block to prevent deformation of the support beam in the direction of the Y-axis. -A- 9. workpiece clamping pallet according to claim 1, characterized in that the support beam is removable or replaceable on the workpiece mounting surface attached with adjustable position. 10. workpiece clamping pallet according to claim 1, characterized in that each unit of the workpiece volume clamping surfaces is set at equal intervals along the X-axis. 11. workpiece clamping pallet according to claim 1, characterized in that the positioning stopper are releasably attached to the support beam. 12. workpiece clamping pallet according to claim 11, characterized in that an auxiliary stopper on a workpiece positioning surface of a positioning stopper is provided for setting the position of the workpiece. 13. workpiece clamping pallet according to claim 11, characterized in that the positioning stopper can be triggered or disengaged from above into a the stopper receiving groove is provided in the head side of the support beam. 14. workpiece clamping pallet according to claim 1, characterized in that all clamping units an appropriate majority of fixtures, which are arranged on one side of the support beam, are connected to form a unit. 15. workpiece clamping pallet according to claim 1, characterized in that the actual clamping unit of each clamping device as independent Unit is formed. 16. workpiece clamping pallet according to claim 14, characterized in that a pulling and pushing means for moving the actual jig forwards or backwards along the X-axis between the actual clamping unit and the base block is provided. # Λ - 5 - 17. workpiece clamping pallet according to claim 1, characterized in that an ejector element det Clamping means of the jig forward and is operated or moved backwards along the Y-axis and has a clamping block connected thereto. 18. workpiece clamping pallet according to claim 1, characterized in that the ejection member or Ausfahrglject dss Clamping means opposite the jig in both directions along the Z-axis at right angles the X-Y plane is driven and this movement is made by a mechanism / which consists of an inclined Driving surface of the actual jig and a matching, inclined, propelling the drive block in a back and forth motion Surface of the clamping block. 19. workpiece clamping pallet according to claim 1, characterized in that the drive means of the jig is a hydraulic cylinder. 20. workpiece clamping pallet according to claim 1, characterized in that the drive means of the jig is a spring. 21. workpiece clamping pallet according to claim 1, characterized in that the drive means of the jig is a screw. 22. workpiece clamping pallet according to claim 1, characterized in that the drive means of the jig is a single-acting hydraulic cylinder with spring return is. 23. Workpiece clamping pallet according to claim 1, characterized in that the drive means of the jig is a double-acting hydraulic cylinder with spring is, the single compression spring or. Has compression spring set in its oil chamber for forward stroke. 24. workpiece clamping pallet according to claim 19, characterized in that the ejector member of the drive means is threaded through the clamping block is which clamping block with a manual operating means is equipped. 25. workpiece clamping pallet according to claim 17, characterized in 'that the clamping block has a contact surface in hemispherical shape, the in contact or in contact with a matching hollow ball seat of the ejection member or extension member is brought so as to set the clamping block in pivoting motion. 26. workpiece clamping pallet according to claim 17, characterized in that an auxiliary chuck is removably attached to the chuck. 27. Workpiece clamping pallet according to claim 17, characterized in that the longitudinal axis of the extension or ejection member of the drive means according to is inclined at the bottom towards the front or front end relative to the workpiece mounting surface.