DE2833145A1 - Horizontal boring-milling machine tool - has fully rotatable workpiece holder with inclined axis for access to five faces - Google Patents

Abstract

The machine has a spindle (1a) mounted in the headstock (2) of the frame provided with guide surfaces (4) and cross slide operates on horizontal guide surfaces (7, 8). On top of the headstock the tool magazine (13) and tool gripping element (14) is mounted to carry out the automatic tool change for the working spindle. A swivelling housing (30) rotates on an axis (26) at 45 degrees to the horizontal. When the work holder is swung into the upper position the clamping surface of the holder is vertical. By swinging the holder into the lower position the clamping surface is horizontal, to allow machining of the four vertical sides of the work.

Description

Horizontal drilling and milling machine

The invention relates to a horizontal drilling-milling machine for automatic Workpiece machining from round sides in one clamping with one around an axis of rotation A workpiece table that can be rotated 360 ° and can be clamped around a swivel axis in an upper pivoting position with a vertical Aufspaunfläche and in a lower pivoting position can be swiveled with a horizontal support surface; with one stationary in the headstock mounted vertically displaceable work spindle and with horizontal relative displacement between the work spindle and the workpiece table.

ßei a known design of such machines is located; themselves the workpiece table with its table axis of rotation and the device for turning and Clamp in a table cradle that can be swiveled by 90 °, its horizontal swivel axis at right angles the table axis of rotation approximately at the height of May dQL crosses the table mounting surface. The pivot axis is formed by 2Nei individual coaxial bearings, which are shown in dQa Bearing cheeks of the table cradle and ii two side storage boxes are arranged. (e.g. MANDEI.LI, pamphlet 1977) 3ieSe and the tdgerwangen protrude in the upper and in the lower swivel position above the clamping surface of the workpiece table.

and thereby impede the accessibility when clamping the workpiece, in measuring operations and section observations. The storage boxes: 1 are on a base plate mounted on the clamping plate on the machine bed across the work spindle Slidable table slide is clamped. Middle under the Table cradle is a semicircular shape that is heavily exposed to the flow of chips and coolant Arranged curved rail device, in particular for clamping in the pivoting positions serves. Since the substantially plate-shaped shape between the bearing cheeks Table cradle with the necessary openings for the facility for turning and Clamping the work table is a machine body of low rigidity Heavy machining and high accuracies are excluded, although the arched rail clamping is provided. The axial guidance of the table cradle takes place on both bearing cheeks or bearing housings, temperature fluctuations, e.g. caused by hot chips, can lead to trouble.

The arrangement of the swivel axis at the level of the clamping surface of the workpiece table causes a considerable shift in the center of the workpiece when the table cradle is swiveled. As a result, the machine displacements of the work spindle in axial and be dimensioned in the vertical direction for a larger work area, than is normally required for the nominal workpiece size of the workpiece table is. To eliminate this disadvantage, the pivot axis would have to be moved higher.

This would make the extended bearing cheeks and storage boxes higher protrude above the table mounting surface, interfere to an increased extent, as well as the itself negatively affect the low rigidity of the table cradle.

Overall, the complete table unit consists of this construction the table slide with attached workpiece clamping plate, the table cradle with built-in workpiece table, the base plate, two storage boxes, two bearings and an arch rail device. This multiplicity causes increased costs in the manufacture and adjustment, and the high number of screwed parting lines reduce the rigidity of the unit.

The mechanical device for turning and clamping the workpiece table is arranged between the side cheeks of the cradle. their location and the the bearing cheeks and storage boxes make it difficult to use an automatic pallet changer and as a result automatic 5-sided machining including workpiece change on machining centers with a horizontal work spindle, as well as their integration in flexible manufacturing systems.

In Werkstatt und Betrieb 110 (1977) 9 5. 639 is a in Fig. 1, 2 NC tilting and rotary indexing table for 5-sided machining separately in front of a larger one Drilling-milling machine set up, whose tilt or swivel axis is below the The table is on the clamping surface. As a result, no bearing components protrude above the clamping surface, but the center shift of the workpiece at Pivoting or tilting the rotary indexing table is so great that the integration this construction is excluded in small and medium-sized drilling and milling machines, because in relation to the workpiece size there are very large machine displacements of the work spindle are required in the axial and vertical directions.

It is common on the known horizontal boring-milling machines of the present invention Size for machining in one clamping of four workpiece sides by 360 ° rotatable workpiece table within a larger non-rotatable workpiece clamping plate to be arranged with a common horizontal mounting level. This allows larger or bulky workpieces can be machined from one side in one setting. Such a processing option, which is indispensable for some productions is, when using the construction described requires the complete very much laborious dismantling of the complete table cradle unit.

The horizontal drilling and milling machine propagated by the manufacturer as a multi-purpose machine according to OS 26 13 736 for automatic 5-sided machining has a work spindle on that in one at known work spindle swivel head, the work spindle by means of an automatic swivel locking device about an axis inclined by 45 ° to the horizontal into a vertical and a horizontal one Spindle position swivels. The automatic tool change also takes place during work operations in the vertical spindle position always after switching over the work spindle swivel head into the horizontal spindle position, in which the 4-sided machining by means of the um 3600 rotatable workpiece tables takes place.

In this method, the positional accuracy is during the vertical machining of the individual holes reduced to each other and when drilling out several coaxial Bores with different diameters, as a result of the multiple switching of the work spindle swivel head for tool change, the precision of the alignment accuracy the holes are restricted. In addition, there is a loss of time because the swivel head the entire functional sequence before the beginning and after the end of each tool change process - Digging out all the face teeth, swiveling, clamping into the face teeth, approx - played through. Frequent switching of the swivel head has negative effects on the long-term accuracy of the swivel locking device, which is arranged in very confined spaces. Finally, in or on the work spindle swivel head for the automatic tool change constructive provisions for the angular location of the work spindle, for clamping and loosening the tools and for a compressed air shower to clean the tool cone necessary. In the case of drilling and milling machines, these are stored in a stationary manner in the headstock Because of the free installation space, the work spindle is built in a simple and reliable manner, while In the work spindle swivel head, complicated, sensitive constructions due to the limited space are inevitable.

As a result of the basic movement geometry when pivoting the Work spindle, as well as in connection with the structural situation on the headstock and machine stand, the work spindle located in the vertical spindle position can the fifth horizontal workpiece side of a cubic workpiece of maximum size do not process in one go. Rather, it is an additional Rotation of the workpiece table by 1800 required because the vertical position Work spindle does not protrude far enough from the front of the stand to accommodate the workpiece table to cover. This results in time losses, reductions in accuracy and a additional programming effort.

For the above reasons, the possibility of machining bulky workpieces, on a workpiece clamping plate that encompasses the rotatable workpiece table be stretched, also restricted.

Since the positional accuracy of the work spindle, especially in the primary horizontal position, not the same as one that is fixedly mounted in the headstock Can be work spindle and since the installation space for a powerful dimensioning of the Work spindle and its storage in the work spindle swivel head is restricted and this construction has a long torsionally elastic guided through the pivot axis Has spindle drive, this drilling-milling machine can with regard to cutting performance and precision not the work results of horizontal drilling lPrasrn; (hinerl with Work spindle L, xSe] en fixedly mounted in the headstock.

That is why the manufacturer of the multi-purpose machine produces a drilling and milling machine in the same order of magnitude for 5-sided working with one horizontal and one Vertical working spindle, both of which are mounted directly in the headstock without a swivel head are.

This machine and similar ones from other manufacturers currently show

No tool changer yet, the automatic ones on both work spindles Enable tool change processes and thus fully automatic 5-sided machining. Because of the high cost of two work spindles with two automatic clamping devices and a tool changer, the changing processes on a horizontal and a vertical work spindle, this concept is only for larger drilling and milling machines economically applicable.

From the foregoing it can be seen that on smaller and medium-sized Horizontal drilling and milling machines enable workpiece machining from five sides in one Clamping on a rotatable workpiece table, as well as optional machining bulky workpieces on a workpiece clamping plate surrounding the rotatable workpiece table with automatic tool and pallet change currently in an economical way, i.e. with high cutting performance, high work accuracy and short non-productive times is not possible with little effort.

The object of the present invention is to eliminate the cited Disadvantages of conventional 5-sided machining and its further development through Creation of a horizontal Bchr milling machine for fully automatic work processes on the basis of the workpiece swivel.

The object is achieved by the characterizing feature of the claims solved, which offer the following advantages: Advantages compared to horizontal drilling and milling machines, which have a rotatable workpiece table pivoted in a table cradle: a No components protrude above the level of the clamping surface of the workpiece table before, thus good accessibility for clamping processes, measuring operations and cutting observations.

b The structure is box-shaped with only one large one underneath the workpiece arranged swivel guide rigid in bending and torsion. As a result, high levels of accuracy even with heavy machining.

c The clamping of the table swivel housing acts on a ring-shaped Large diameter support track. This means optimal damping between the table base and table swivel housing.

d There are no components in the area of the chip and coolant flow available. This increases operational reliability.

e There is no displacement when machining the fifth side of the workpiece the geometric center of the workpiece of maximum size. As a result, minimal Shift range in all machine axes and compact, cost-effective machine design.

f Bulky workpieces can be clamped from two sides in one processed in an automatic sequence.

g The construction effort for swiveling the table is lower: 1 swivel base (= Table slide) 1 table swivel housing 1 swivel bearing 1 compl. Workpiece table The version with a table cradle, on the other hand, requires: 1 table slide 1 base plate 1 Table cradle with two attached cheeks 2 swivel bearings 2 storage boxes 1 curved rail device 1 complete Workpiece table h The integration into the basic machine structure is very organic and there are the best prerequisites for the desired creation of variants on the part of the machine manufacturer given.

i An automatic pallet changer can be attached without difficulty As a result, the classification in flexible manufacturing systems is very good possible.

Advantages compared to the multi-purpose machines with work spindle swivel head: k The work spindle is strongly dimensioned and is fixed in place directly in the headstock and is done in the usual way torsionally rigid driven. As a result, higher Cutting performance with long tool life and higher work accuracy.

1 The devices for tool clamping and angular location of the work spindle are of normal and simple design because of the favorable spatial situation. Through this higher operational reliability in this regard.

m To change tools while machining the fifth workpiece side no additional 1800 swivel movement is required. This increases working accuracy, Time saving and less stress on the swivel device.

n The fifth side of the workpiece is machined in a #uge without additional table rotation of 1800. This increases accuracy and saves time and avoidance of additional programming work.

o When machining bulky workpieces on two sides on one The entire workpiece clamping plate, which includes the rotatable workpiece table, stands The work area is also available for machining the second side of the workpiece.

As a result, no reclamping for complete machining of the second workpiece side.

p The fifth or second side of the workpiece is machined in their vertical position. This improves chip and coolant flow.

General advantage: The horizontal drilling-milling machine according to the invention enables workpieces from five or two sides to be set up fully automatically to process, with regard to cutting performance, work accuracy, accessibility, Chip and coolant flow, space requirements and the ability to integrate the tool and Pallet changer equivalent to modern machining centers for 4-sided machining is. The additional structural effort for swiveling the table is relatively very low, if the cost and various disadvantages of the conventional method for processing five workpiece sides - by manual reclamping on a horizontal drilling-milling machine with intermittent machine downtime or manual reclamping on a Vertical drilling and milling machine - added over the period of machine service life will. With fully automatic 5-sided machining on one horizontal and one Vertical machine with stationary working; spindles are also the high investment costs to be charged to the gasification system.

The following is a smaller horizontal drilling-milling machine according to the invention explained in more detail on the basis of the drawings.

bs show: Fig. 1 The side view of the machine with a vertical-n Partial section along line t ... I in Fig. 2, the.

rotatable workpiece table is in the lower swivel position, FIG. 2 shows the top view of the machine according to FIG. 1, FIG. 3 shows an enlarged vertical Partial section along line III ... III in Fig. 2, Fig. 4 is a vertical section Line IV ... IV in Fig. 2, Fig. 5 shows an enlarged vertical section along the line V ... V in Fig. 2, Fig. 6 a section along line VI ... VI in Fig. 5, Fig. 7 a enlarged cross-section through the T-slot of the table swivel housing according to line VII ... VII in FIG. 8, FIG. 8 a view in the direction of arrow VIII in FIG. 5, FIG. 9 a enlarged section along line IX ... IX in FIG. 8, FIG. 10 a view in the direction of the arrow X of FIG. 9, FIG. 11 shows a partial side view according to FIG. 1, but with the rotatable workpiece table in the upper position, Fig. 12 shows a partial Side view according to FIG. 1, but with one encompassing the rotatable workpiece table Workpiece clamping plate, FIG. 13 a plan view of FIG. 12, FIG. 14 a side view according to FIG. 12, but with the workpiece table and the workpiece clamping plate in FIG the upper pivot position, FIG. 15 is a partial plan view of the horizontal drilling / milling machine according to Fig. 1, 2, but in the version with an attached workpiece pallet changer, FIG. 16 shows a vertical section along line XVI ... XVI in FIG. 15.

The work spindle 1 with its end face generally rests in the headstock 2 of the aschinenstders 3, which with its guideways 4 on the cross slide 6 is perpendicular is movable.

Dieter leads himself with horizontal ferry tracks 7, 8 in bed tracks 12, 15, which are approximately in a vertical plane on the bed transverse part 10 of the as a whole 11 designated machine bed are arranged. Located on the spindle stack 2 the tool magazine 13 and the tool gripper 14 for automatic tool change on the work spindle 1.

The bed transverse part 10 is by means of the two outer cheeks 16, 19 and the middle cheek 17 connected to the longitudinal part of the bed 18, on the bed tracks 21, 22 of the table base 23 in the direction of the work spindle 1, the ear feed and Carries out infeed movements. The table swivel housing rests on the table base 23 30, with the help of which the workpiece table 20 rotatable on it by 45 ° to the horizontal inclined pivot axis 26 into a lower pivot position with a horizontal mounting surface, as shown in FIGS. 1, 2, 3, 5, and in an upper pivot position with a vertical Clamping surface, as shown in Fig. 11, adjustable by swiveling urr, 1800 is. In the lower pivot position, the workpiece 36 is right-angled of its four machined sides facing the table mounting surface, and in the In the upper swivel position, machining takes place from the parallel to the table mounting surface workpiece side located in position.

Figs. 1, 2, 5 show that on the table pedestal 23 one at 450 to the horizontal inclined annular lower support track 25 and a bearing part 27 are incorporated, in which the pivot axis 26 is supported concentrically by means of the roller bearings 28, 29.

This is screwed to the table swivel housing 30 with screws 31, its annular support track 32 congruent on the lower support track 25 rests. The table axis of rotation is in the vertical axis plane 33 of the pivot axis 26 35 arranged in such a way that both axle extensions 26a, 35a are in the center 38 cut the workpiece 36 of maximum size, the axial plane 33 being parallel is directed to the vertical work spindle plane 34, and when the headstock 2 is located in the middle of the transverse bed 10, the two axial planes 33, 34 are aligned.

The work spindle 1 is located opposite in the table swivel housing 30 the device designated as a whole with 37 for rotating and clamping the workpiece table 20. It consists essentially of a ring gear with face teeth 40, which with the crown wheel with face toothing screwed to the underside of the workpiece turntable 20 41 cooperates, and the toothed piston drive 42, which meshes with the spur gear 43 stands. The energy supply to the device 37 takes place through the lines 44, which are laid through the bore 53 of the pivot axis 26. Before turning the table The face gears are used to machine the four vertical workpiece sides 40, 41 by lifting the workpiece turntable 20 by means of a not shown Reciprocating piston disengaged, followed by rotation by the toothed piston drive 42 takes place. Then the workpiece table is opened by the downward pressure on the reciprocating piston 20 fixed at an angle in the face gears 40, 41.

The device for rotating and clamping the turntable can also be used without Face gears formed in any other common design be.

12, 13, 14 show a table swivel housing 45a on which a workpiece clamping plate 46 encompassing workpiece turntable 48 is cast on, whereby the two clamping surfaces lie in one plane. The workpiece turntable 48 is here expediently circular. It can be seen that the on the workpiece clamping plate 46 clamped bulky workpieces 47 in a Clamping can be edited from two sides and that for the rotatable Work table 48 determines workpieces 36a without being obstructed by the workpiece platen 46 can be machined from five sides in one setting.

According to Fig. 1, 2, 3 is on the underside of the table base 23 is a arranged parallel to the work spindle 1 linear guide with the bed tracks 21, 22 cooperates.

I should extend two base tracks designated as a whole with 49 located in the side of the circular support tracks 25, 32 base approaches 50, which are cross-connected by means of the bridge 51. Each base track 49 has one Carrying guide 52, as well as pairs of rollers # elements 54 for directional guidance on, and by means of the clamping piston 55, the table base 23 becomes the longitudinal part of the bed during milling operations 18 clamped.

The bases are in the interest of a good chip and coolant flow approaches 50 preferred in the exemplary embodiment to a limited extent, as a result of the part of the support tracks on the spindle side in the lower pivoting position of the workpiece table 1, 2, 3, 5 is more heavily loaded than in the upper pivot position according to Fig. 11, 14. Serve to relieve the supporting tracks in the lower pivot position the pressure rollers 59 mounted in vertically guided roller bolts 56. Above each Roller bolts 56 are disc springs 57 ~ and a piston 58 arranged in the lower Pivoting position of the table swivel housing 30 against the shoulder 60 of the cylinder liner 61 is acted upon hydraulically and by means of the force of the disc springs 57 causes the discharge.

The actuation of the piston 58 takes place analogously together with the Acting on one side of the toothed piston 63 shown in FIGS. 5, 6, which is shown in FIG Engagement with the spur toothing 70 of the pivot axis 26 is and the pivoting of the table swivel housing 30 causes. The toothed piston 63 has at its ends Damping piston 71, 72 and is guided in the cylinder 73, which by means of the cylinder heads 74, 75 is screwed tight in the table base 23. The front sides of the tooth piston 63 remain free at their ends through a gap 76 to their mating surfaces because the lower and upper pivot position of the table Schwenkge housing 30 by special Stop devices; as explained in more detail later, are determined in position.

5, 6, 7, 8 show that in the support track 32 of the ii # ch swivel housing 30 an oversized T-slot 65 is incorporated, whose to the support track 32 parallel surfaces with the heads 67 of the piston rods 68 of the four clamping cylinders 66 for clamping the table swivel housing 30 to the table base 23 in the two Cooperate pivot positions. In the base of the T-slot 65 there is a curved rail in a semicircle 80 with different track heights 79, 78 screwed in. She works with her In the T-groove 65 protruding pressure roller 83 of the below and parallel to the pivot axis 26 in the axis plane 33 in the table base 23 bearing roller bolt 82 together. This is acted upon by the disc spring column 81, and the curved track of the Curve rail 80 is dimensioned such that in the lower pivot position of the Table swivel housing 30 a spring force is applied, which is during the pivoting in the upper swivel position reduced to the different center of gravity to compensate largely during the pivoting movement. This will. the long-term accuracy the in itself less polluted Support tracks 25, 32 guaranteed. In order to achieve a desired constant and uniform load, it is also used arranged at the free end of the pivot axis 26 large plate spring 85. It supports with its outer diameter on the one used on the bearing part 27 of the table base 23 Pressure ring 86 and sits with its inner diameter on the bearing ring 87, which means Needle bearings 68 are mounted on the pivot axis 26 and provided axially by the nut 89 is.

For precise definition of the lower and upper swivel position of the table swivel housing 30 is used according to Fig. 6, 8, 9, 10 a stop device, the two fixed stops 90 arranged in the area of the lower support track 25 of the table base 23 and two positioning stops, designated as a whole by 91, are arranged in the table swivel housing 30. Each fixed stop 90 is by a fastening flange 92 with a milled circular arc-shaped Stop web 93 is formed, which protrudes from below into the T-slot 65 The mounting flange 92 is sunk into the lower support track 25 and fastened with the screws 34. The main body 96 of each Stellanschi # ages 91 is parallel to the support tracks Recessed outer surface area 95 of the table swivel housing 30, with the screws 1o8 and protrudes with its lower end into the T-slot 65 from above. In the base body, which is essentially designed as a rotating part with the fastening flange 97 96 a longitudinal groove 98 is incorporated with a base surface 99 inclined to the axis of the rotating part, in which the stop wedge bar 100 leads.

It is firmly screwed into the base body 96 with the nuts 101 Threaded bolt 102 adjustable, whereby they move freely in the slot 107 by means of the Screw 103 and the disc springs 104 are held in contact with the groove bottom 99.

From Fig. 9 it can be seen that by shifting the from above in the T-groove 65 protruding stop wedge bar 100 in the circumferential direction a micro-adjusting movement their planar stop surface 105 relative to that of the circumferential machining of Fixed stop 90 circular arc-shaped stop surface 106 of the stop web 93 takes place. From the description it can be seen that as a result of a large Radius with respect to the pivot axis 26 coming into effect stops, as well as because of Their completely protected arrangement ensures a very high positional accuracy of the two Pivoting positions is made possible after each pivoting process, which is in its final phases by the damping piston 71 of the toothed piston 63 at a decreasing speed he follows.

According to FIGS. 1, 2, 4, 5 is an extension of the two base approaches 50 each has a guide cover 110 screwed on to protect the bed tracks 21, 22. In the front displacement area of the table base 23, near the work spindle 1, find they in the indentations 111 located in the transverse part 10 of the machine bed 11 Space, being spaced apart from the without obstructing the flow of chips and coolant The cheeks 16, 17, 19 move freely in the spaces 114. The guide covers 110 do not interfere with the work spindle 1 even in the lowest position Underside of the headstock 2 hinged swarf water catcher 112, which the free space 113 in the cross slide 6 below the headstock 2 covers. The one in the longitudinal part of the bed 18 inclined troughs 115 located in extension of the spaces 114 also provide in the rear displacement area of the table base 23 for good chip coolant drainage to the chip conveyor indicated by dash-dotted lines.

of 116.

FIGS. 15, 16 show the horizontal drilling and milling machine according to FIG. 1, 2 with an automatic pallet changer, which suits the space on the Table base 23 and table swivel housing 30 is adapted. For this purpose, the in Fig. 5 indicated device 37 for rotating and clamping the workpiece table accordingly the additionally required function for clamping the pallets in known not drawn construction expanded. On one side of the longitudinal bed part 18 is the vertical screw surface 120 is provided to which the lower part 121, which is supported with its foot 125 on the foundation, is screwed on. On its horizontal rolling paths directed parallel to the guideways 7, 8 122, 123 is a carriage 124 by means of one, not for the sake of a better overview drawn, piston drive in the drawn drawn loading position and can be moved into the change position indicated by dash-dotted lines.

At the machine-side end of the carriage 124 is stored around the vertical Axis 126 by 180) pivotable pallet carrier 127, on the opposite fork-shaped the support arms 128 are incorporated in pairs. Each pair of support arms 128 form one Pallet holder with four small lifting pistons 130 each, which are used to lift a pallet be pushed out from the table swivel housing 30 upwards and thereby with the piston pin 131 engage in corresponding depressions on the underside of the pallet. the Screw-on surface 120 and the pallet changer are arranged in such a way that the pallet can be changed takes place in the rear end position of the table base 23.

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Claims (10)

Claims 1. I Horizontal drilling-milling machine for automatic Workpiece machining from five sides in one clamping with one around an axis of rotation 360 ° rotatable and clampable workpiece table that turns around a swivel axis into a upper pivot position with vertical clamping surface and in a lower pivot position can be swiveled with a horizontal clamping surface; with one stationary in the headstock mounted vertically displaceable work spindle and with horizontal relative displacement between the work spindle and the workpiece table, characterized by the following Common features: a The table is swiveled by 450 to the right of the woo inclined pivot axis (26). b The pivot axis (26) is the front side (la) of the work spindle (1) opposite on the side of the axis of rotation facing away from the work spindle (1) (35) of the workpiece table (20, 48) arranged. c The pivot axis (26) and the axis of rotation (35) lie in a vertical one Axial plane (33), which is parallel to the perpendicular. Working spindle axis level (34) directed is. d The workpiece table (20, 48) is on the horizontal base (52) executed table pedestal (23) by means of a table swivel housing (30) around 1800 pivotable. e The center extensions (26a, 3Sa) of the pivot axis (26 and the The axis of rotation (35) intersect at a point (38) of constant height above the interacting one Support tracks (25, 32) of the table base (23) and the table swivel housing (30) preferably approximately in the geometric center of the workpiece (36) of maximum Size. 2. Horizontal drilling-milling machine according to claim 1, characterized in that that on the table swivel housing (30) a workpiece clamping plate which surrounds the workpiece table (48) (46) is worked in plane with the clamping surface of the workpiece table (48). 3. Horizontal drilling-milling machine according to claim 1, characterized in that that on the underside of the table base (23) one to the work spindle (1) and to Axial plane (33) parallel 2-way linear guide (52,54) is arranged, which extends in base lugs (50), which laterally of the support tracks (25,32) are arranged and cross-connected by a bridge (51). 4. Horizontal drilling-milling machine according to claim 1, characterized in that that in each of the two base lugs (50) a roller relief device (49) with a hydraulic piston (58) and disc springs (57) is arranged, the hydraulic parallel to one side of the toothed piston (63) serving for table pivoting is switched that the pressure rollers (55) in the lower pivot position on the Bed tracks (21,22) are under load and relieved in the upper pivoting position are. 5. Horizontal drilling-milling machine according to claim 1, characterized in that that in the support track (32) of the table swivel housing (30) for clamping a T-slot (65) is incorporated with an oversized cross-section, in the two positioning stops (91) arranged in the table swivel housing (30) protrude from above, which are screwed into the support track (25) from below into the T-slot (65) protruding, fixed stops (90) limit the 1800 swivel movement. 6. Horizontal drilling-milling machine according to claim 1, characterized in that that below and parallel to the pivot axis (26) in the axis plane (33) in the table base (23) a roller bolt (82), which is acted upon axially by a spring (81) and whose Pressure roller (83) protrudes into the T-slot (65) and with one in the bottom of the T-slot (65) bolted semicircular curved rail (80) cooperates. 7. Horizontal drilling-milling machine according to claim 1, characterized in that that a plate spring (85) rotates axially and radially on the pivot axis (26) supported, the outer diameter of which at constant spring force on the bearing part (27) of the table base (23) rests. 8. Horizontal drilling-milling machine according to claim 1, wherein the transverse to the work spindle (1) directed two bed tracks (12, 15) on the machine bed one below the other are arranged, characterized in that in extension of the base lugs (50) a guide cover (110) is screwed on each, which is in the displacement area of the table base (23) near the work spindle (1) in an indentation (111) of the transverse part (10) of the Machine bed (11) penetrates. 9. Horizontal drilling-milling machine according to claims 1 and 8, characterized characterized in that the transverse part (10) and the longitudinal part (18) of the machine bed (11) are connected by two outer cheeks (16, 19) and a central cheek (17) and the guide covers (110) at a distance from the cheeks in the spaces (114) are free moving. 10. Horizontal drilling-milling machine according to claim 1, characterized in that that the energy supply lines (44) to the device (37) for turning and clamping of the workpiece table (20) laid through a bore (53) of the pivot axis (26) are.