DE1652021A1 - Grinding machine - Google Patents

Description

Herbert Maser

t _S * i * nw * tt

Karlsruhe mUiagerstnte29

Applicant; CIICIHATI MILLII (J MCHIIES LIMITED (UK)

Grinding machine

The invention relates to a grinding machine with one to one first vertical axis rotatably mounted grinding head, a support piece on which a slide is slidably mounted, this question piece compared to the machine bed by one second vertical axis is pivotable and with an intermediate part, whereby the grinding head can be rotated around a third vertical axis in relation to the machine bed »

The common grinding machines contain a machine drum or machine _{bed r} which carries a longitudinally displaceable work table on which the workpieces are attached; furthermore a grinding head _r which generally carries a grinding wheel. This grinding head is usually on

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a slide is provided which can be moved on a substructure or a support. The grinding head is designed in such a way that it can be rotated about a first vertical axis relative to the carriage * and the support is designed so that it can be rotated about a second vertical axis relative to the machine bed. Such a machine can be used not only for grinding external, cylindrical surfaces, but also for. Plunge grinding, cone grinding and face grinding. The maximum size of the workpiece is determined by the maximum amount of the possible outer cylinder blind * that can be carried out on the workpiece.However, it is not possible to carry out the angle plunge-cut grinding over the entire length of a workpiece of maximum size.An increasing diameter is also limited of the workpiece the setting range within which the angular grooving can be carried out * In the same way, the setting range for taper grinding is limited by the maximum diameter of the workpiece, among other things. The elimination of these restrictions has already been sought in such grinding machines, and an arrangement is known in which the grinding head is mounted on the slide via an intermediate part. this intermediate part being fastened eccentrically on the slide slide in such a way that the adjustment of the grinding head can optionally be carried out in four fixed positions relative to the slide. However, this arrangement has a number of advantages, including the fact that the additional weight of the intermediate part (Leu slide loads, and that the available adjustment is calibrated, although improved compared to conventional designs, nevertheless remains very tight.

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It also causes difficulties in the grinding wheel carrier to be set opposite the machine bed. .

With the present invention the overcoming of the indicated Desired disadvantages »The characteristic feature of the invention is in a grinding machine with a machine bed, a A grinding head rotatably mounted about a first vertical axis, a support piece on which a carriage is slidably mounted is, with this support piece opposite the machine bed by one second vertical axis is pivotable, and with an intermediate part, so that the grinding head is a third I compared to the machine bed vertical axis rotatable is seen in the fact that the support piece with Intermediate part on a welding support plate around the second axis is rotatably mounted that the Sciawenklagerungsplatte on the Machine bed is rotatable about the third axis, and furthermore Clamp elements are provided, with the help of which the swivel mounting plate relative to the machine bed and / or the support piece can be set in the appropriate angular position. One such a design increases the adjustment range of the grinding machine very considerable, with only a slight change in the Machine parts. Likewise, this arrangement allows a favorable design of a conventional transmission, which is a relatively single. " multiple adjustment of the grinding head in the intended angular positions allows and also serves to trigger the movement of the carriage feed.

An advantageous embodiment of the guide of the pivot mounting plate can consist in the machine bed having a

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has circular recess, and that. the pivot mounting plate engages with an edge part in this recess. In a similar way and likewise advantageously, the guide of the intermediate part can be designed in such a way that also in the pivot mounting plate a circular recess is present, and that the intermediate part has an insert part, which is used as a G-guide bearing intervenes in this. As a simple, practical embodiment the bracket elements are in accordance with a further embodiment the invention provided T-shaped clamping bolts.

According to an advantageous development of the invention, in a machine with a rack arranged on the slide, as well as a pinion engaging in this rack and a outer handwheel on the machine bed, this handwheel via a Gear drive is connected to the pinion * provided that the pinion includes a main gear, which is the third Axis is rotatable and in drive connection with the handwheel as well stands with a gear, which is attached to a shaft, carried by the intermediate part rotatable about the second axis is and the pinion carries that also a temporarily free rotatable first tooth part is provided, which mit.dem main gear meshes so that this first tooth part is arranged on a shaft which is carried by the pivot bearing plate, and that a clamping device is provided which is temporarily adjustable to block the first tooth part, whereby a relative movement between the support piece and the bearing pivot plate and between the carriage and the support piece is prevented. The clamping device, which allows the free rotational movement of the first tooth part prevented may be useful second tooth part in a rotationally fixed connection with the first tooth part

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have, as well as a transmission gear, which with the second Tooth part meshes and is rotatable about the third axis, and it can be a Clamping bushing can be provided in connection with a clamping lever, which a locking of the transmission gear relative to the Machine bed enables. As an advantageous solution for the connection of the two intermediate gears it has been found that the Tooth parts manufactured in one piece in the form of a step gear · It can also be beneficial if the main gear with the next arranged first gear by another Transmission gear is in drive connection · I

One embodiment of the invention is intended below, for example will be described with reference to the drawing; show it:

FIG. 1 is a plan view of a grinding machine according to FIG the invention,

2 shows a side view in the direction of salvation 2 in Fig. I, partly in section,

Figures 3, 4 and 5 V '~

View from above on the grinding machine in which | the setting for linstechschleif s, Kegelschlei- fen ^v and Stirnfläehenschleifen is shown,

6 is a partial view on an enlarged scale,

Fig. 7 shows a schematic gear arrangement of the embodiment according to Fig. 6 *

As can be seen from FIGS. 1 and 2, the SehlßifaaaoMne according to the invention is a modification of a known grinding machine, φ ^
should be practiced

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The essentially known, basic I-machine training:

The grinding machine shown in the drawing includes a front machine base or bed 11, and a rear machine base or bed 12 _f The front machine base 11 is provided on its top with longitudinal guides 14, and a carriage 15 is along these guides 14 movable. A swivel table 17 rests on the carriage 15 and can be pivoted relative to this carriage 15 about a vertical axis by approximately 10 ° to each side of the equipping position, which is shown in FIG.

The swivel table 17 carries a holder for a headstock and a beehive 19. The swivel table 17 also has a dovetail-shaped guide 21 on its upper side, in which the headstock holder and the side block 19 can be moved against each other * C-shaped brackets 22, of which Only one shown in the drawing is used to fix the headstock holder and the tailstock 19 in the dovetail-shaped guide 21. Me headstock holder about a vertical axis on the swivel base 25 have rotated "headstock holder and tailstocks 24 by 25, between which can be a '■' held for grinding workpiece 26 · ■ J

The by-stick 19 is preferably one of the tip of the by-stick bearing spindle (not shown in the drawing) and a Adjustment lever 27 is provided, whereby this spindle in the manner is movable that the tips 24 and 25 with the ends of the

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Workpiece 26 come into contact to produce the holder, or can be withdrawn to release the workpiece 26. A spring device (also not shown in the drawing) is included in the tailstock 19, thereby reducing the movement of the tailstock tip 25 for contact with the end of the workpiece 26 is supported. .

The length of the front machine bed 11 and therefore the path of movement of the swivel table 17 in the machine direction is determined by the design by the maximum length of the workpiece 26 that is to be machined on the machine Swivel table 17 from the normal position shown in FIG. 1 - ■■ * + T ". Here, ¹¹ T" means the structurally determined adjustment width at both ends of the slide 15 ·

The rear machine base 12 carries a grinding head 28 jait a grinding wheel 29, which is not shown in the drawing by a Electric motor can be driven. This grinding wheel 29 is located usually on the left side of the grinding head it is 28, as shown in solid lines in Fig. 1, but it can also be arranged on the right side of the grinding head 28, as indicated in Fig. 1 by dash-dotted lines.

The grinding head carrier:

The grinding head carrier and its holder differ significantly from the known designs in surface grinding machines.

The rear machine bed 12 has a shoulder 31 with a

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centrally arranged circular recess 32 (see FIG. 6). A plate known as the pivot plate 33 rests on it the extension 31 and has to engage in the circular recess 32 an edge portion 34 'so that the bearing pivot plate pivotable about a vertical (3rd) pivot axis 35 in the recess 32 is stored. The bearing pivot plate 33 also has ein'aufragenden approach 36. This towering approach 36 shows also a circular recess. 37, the protruding Extension 36 and the circular recess 37 with respect to the vertical pivot axis 35 of the mounting plate 33 are arranged eccentrically are. An intermediate part 38 engages with a matched one Shoulder 39 into recess 37 »The intermediate part 38 is thereby compared to the storage pivot plate 33 by a further vertical (2nd) axis 41 pivotable, which is at a distance from the vertical (3.) Axis 35 is located * This intermediate part 38 points to its an elongated horizontal support piece 42 on the upper surface (see. Fig. 2), which opposite the intermediate part 38 as a separate attachment part or, as shown in Fig. 6, in one piece with this can be formed. The support piece 42 shows a pair of further longitudinally extending further guides 43 and 44, on which a feed schilt th 45 is displaceable in such a way that he can cover a displacement path B on the support piece 42. ... - ·

The grinding head 28 is carried by the feed slide 45. on This feed slide 45 is the grinding head 28 around a vertical (1.) Axis 46 pivotable (see. Fig. 2,3) · The loop head 28 can also be moved in the longitudinal direction on the feed slide 45. Before starting the machine, the Adjust the angle and displacement position of the grinding head 28 on the feed slide 45, and the

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Grinding head 28 is then in these positions on the feed ~ slide 45 by suitable brackets, not shown held -

c JThe gear for moving the grinding head (Fig. 6 and 7):

The grinding head 28 is movable by a handwheel 47 (only shown in Fig. 2) during operation of the grinding machine. This band wheel 47 is connected to a vertical shaft 48 (see FIG. The vertical shaft 48 carries a main wheel 49 at its upper end, which is fixed in an axial seal by a bracket in the form of a spring washer. The Ubertragungszahnrad 52 has a labe * 54 ^ which is surrounded by a Ktemmvorrichtung "These enthüt a fleHpbuchse 55 and a clamp lever ^ ^^ -56t is such Actuate the ar ^ _f daßÜ

The gear wheel 52 can be held in place opposite the rear machine bed 12 »by means of an additional gear wheel or a one-piece stepped gear wheel 57 is mounted on a stub 59 via further ball bearings 58, as the pivot bearing plate 33“ also uni # ti extends * the step tooth- ) wheel 57 has two lafeitie 6t ün4 62 _f which duiieh the indicated joint 2wl ^ Q | iMsMÄ verbuken siiid and with deji Ifenptzahnraä 49 find the fitetr ^ gttnisza ^ the construction gear A9 is in turn with eJnsm further iiberteagiragszahn % 7) t which is rotatably attached to the welding plate 0 with a radial bearing and is fitted with a gearwheel 64. The number 64 has the same part - circular diameter as the tooth part 61 of the stepped dial 57 _f

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which meshes with the main gear 49. The gear 64 is with connected to a shaft shaft 65, which is rotatable about the additional vertical axis 41 · The shaft shaft 65 is of additional Ball bearings 66 are carried, which are fastened in the support piece 42 (or in the intermediate part 38 in the case of a non-integral design!) are. The shaft shaft 65 is vertical; fixed by a further spring ring 67 and has at its lower End of a keyway 68 for making the rotationally fixed connection with the gear wheel 64. The upper end of the shaft shaft 65 shows a one-piece molded pinion 69. The pinion 69 meshes with it a rack 71 which is attached to the feed slide 45.

Fastening means not shown in the drawing are used for Attachment of the feed slide 45 to the Fükningsstück 42, clamping bolt 72, which through recesses 73 in question piece 42 (or 38) allow the support piece 42 (or the intermediate part 38) to be fixed with respect to the welding mounting plate Further clamping bolts 74, only one of which is shown in the drawing is, lie with their heads in arcuate recesses 75 on the rear machine base 12 and allow a Clearing the swivel mounting plate 33 in relation to this rear machine base 12. When the clamps of the feed slide 45 (not shown in the drawing) are opened, the feed slide can be in the longitudinal direction with respect to the Move intermediate part 38 (or the support piece 42), loosen it the clamping bolt 72 can the intermediate part 38 with the carriage 42 or in one-piece design the Eragestück 42 to the additional vertical axis 41 are rotated relative to the pivot bearing plate 33. Finally, a loosening of the other allows Clamping bolt 74 the rotational movement of the swivel mounting plate 33 relative to the rear machine bed 12 about the vertical axis 35.

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The movement of the grinding head

The following will now describe the manner in which the grinding head 28 is moved during operation of the machine. It is assumed that the grinding head 28 is set on the feed slide both in the Yiangle and in the longitudinal position and the machine has been clamped in these positions before starting work. It is also assumed that those described below Locking measures are carried out after the preparation has been made. Finally, it can be assumed that the various further parts independent of the grinding head 28 and feed slide 45 are initially not specified if the following described process begins «

a) Moving the grinding head 28 along the other guides 43 and 44

The swivel mounting plate 33 is set in relation to the rear machine bed 12 by tightening the further clamping bolts 74 set. The intermediate part 38 or the support piece 42 are tightened by tensioning the clamping bolts 72 with respect to the pivot mounting plate 33 clamped. The feed slide 45 is initially.

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not / connected to the support piece 42, and likewise the transmission gear 52 is freely movable by corresponding actuation of the clamping lever 56. When the handwheel rotates, the main gear 49 rotates freely, since the transmission gear 52 that is not held does not prevent the main gear 49 from rotating. The main gear 49 drives the gear with the interposition of the further transmission gear 63. As a result, the pinion 69 causes the rack to move and causes the feed slide 45 and the grinding head 28 to be displaced.

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b) The pivoting of the intermediate part 38 or the guide part 42 which is integral therewith.

• This process is carried out in order to bring about a change in the position of the feed slide 45 and thus a change in the relative position of the same "together with the grinding head and the axis 26a of the workpiece 26 (see FIG The machine bed 12 is clamped by the clamping bolts 74. The feed slide 45 is also firmly connected to the support piece 42 by the aforementioned clamping means (not shown in the drawing) 52 remains unlocked and therefore freely rotatable ₀

When the handwheel 47 rotates, the main gear 49 rotates and thereby drives the gear 64 via the further transmission gear 63e move · As a result, the support piece 42 rotates around the additional vertical axis 41, and there is a change in the angle adjustment between the feed slide 45 and the axis 26a of the Y / extension piece 26 _o

c) Pivoting the bearing pivot plate 33

During this process, the bearing swivel plate 33 together with the feed slide 45 and the grinding head 28 pivoted about the vertical axis 35 »At the same time, however, the feed slide 45 rotates about the additional vertical axis

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Axis 41, so that the angular relationship between the feed slide 45 and the axis 26a de3 »Jerks piece 26 remains constant»

The feed slide 45 is with the support piece 42 by clamp means described firmly connected. The clamping lever 56 is now tightened, as a result of which the transmission gear 52 is set in relation to the rear machine bed 12. The storage pivot plate 33 is free with respect to the rear machine bed 12, and at the same time the intermediate part 38 (or the support piece 42 in the case of a one-piece design) not firmly connected to this swivel mounting plate 33. » By rotating the handwheel 47, the main gear 49 rotates and thereby the tooth part 62 of the step gear 57. However, since the transmission gear 52 is clamped, the tooth part 62 of the stepped gear 57 do not rotate freely about the further vertical axis 59a. This causes the step gear 57 the shaft shaft 59 and with it the pivot bearing plate 53 execute a rotary movement about its vertical axis 35. At the same time, the main gear 49 rotates the gear 64 and causes a rotational movement of the support piece 42 about the additional vertical axis 41, as described above "Since the tooth part 61 of the step gear 57 and the gear 64 have the same tooth pitch diameter up'a ^ aen, the rotation of the carrying piece takes place 42 equal and opposite to the rotation of the pivot plate 33, so that the angular relationship of the carriage and thus the grinding head 28 remains constant with respect to the axis 26a of the nerkstücks 26 *

operation

i) Plunge grinding (Figure 3)

The setting for plunge grinding is shown in FIG.

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The intermediate part 38 is rotated so that the support piece 42 and the feed slide 45 are opposite to the axis 26a of the workpiece 26 are in the intended 'angular position. By rotating the pivot plate 33 in the manner described above The type of movement of the grinding wheel 29a is determined » The clamping bolts and clamp means are, as described above, loosened so that the rotation of the handwheel 47 results in a sliding movement of the feed slide 45 on the support piece 42 causes. It should be noted that because of the arrangement of the intermediate part 38, the path of movement of the grinding wheel 29a accordingly the diameter of the circle 41a, which the additional vertical axis 41 describes in its movement. This enables the grinding machine to perform plunge-cut grinding over a wide range of To carry out work positions of a workpiece 26 which has the maximum length for which the machine is designed,

ii) cone loops (Figure 4)

The setting for taper grinding is shown in Figure 4. The grinding head is at right angles to the feed slide. As described above, set in the desired angular position relative to the axis 26a of the workpiece 26. The definition the movement path for the feed slide 45 takes place through Rotation of the pivot bearing plate 33. By suitable adjustment the clamping bolt and locking means in the manner described above can be used by the feed slide by means of the handwheel be mowed movably «It should be noted that an in This wise set machine also produces a conical grind on such a workpiece over a wide range of positions

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can produce which has the maximum axial length for which the machine is designed, both with a new as well as a used grinding wheel 29o

iii) end face grinding (Figure 5)

The setting for face grinding is shown in Figure 5 shown · The tailstock 18 is rotated 90 ° and brought close to its working position. The grinding head 28 is set up in such a way that the axis of the grinding wheel 29 is parallel to the path of movement of the tailstock 18 along the guides 14 » By rotating the swivel mounting plate 33, the grinding head 28 can be moved back and forth from the tailstock 18, corresponding to the axial length of the workpiece 26, its end face is to grind. It should be noted that the machine which is set in this way, the end faces of square pieces 26 with an axial length Y with a new and with an axial length Z with a worn grinding wheel. Both lengths are greater than previously possible

Summary;

The machine described above has a larger working area on workpieces than the previously known machines · It has a simple gear arrangement with which the individual parts of the Machine can be moved. The application of the features of the invention is not limited to the structural details of the description and the accompanying drawings

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Claims (7)

A 394 claims: 1. Grinding machine with a machine bed, a grinding head rotatably mounted about a first vertical axis, a support piece, on which a slide is slidably mounted, this support piece by a second relative to the machine bed vertical axis is pivotable, and with an intermediate part, whereby the grinding head relative to the machine bed by a third vertical axis is rotatable, characterized in that the support piece (42) with intermediate part (38) is rotatably mounted on a pivot mounting plate (33) about the second axis (41) that the pivot mounting plate (33) is rotatable on the machine bed (12) about the third axis (35), and that clamp elements (72, 74) are also provided are, with the hiIe of the pivot bearing plate (33) relative to the machine bed (12) and / or the support piece (42) in a corresponding manner Angular position can be set. 2. Grinding machine according to claim 1, characterized in that the machine bed (12) is circular Has recess (32) into which the pivot mounting plate (33) engages with an adapted edge part (34) as a sliding bearing. 3. Grinding machine according to claim 1 or 2, characterized in that that the pivot mounting plate (33) has a circular recess (37) into which an adapted Insert part (39) of the intermediate part (38) as a sliding guide bearing intervenes. BAD ORIGINAL - 2 1098? * / 0313 4. Grinding machine according to claim 1, 2 or 5, characterized in that the clamp elements are T-shaped Have clamping bolts (72,74). 5. Grinding machine according to claim 1, 2, 5 or 4 with an am Rack arranged on the slide, as well as a pinion engaging this rack and an outer handwheel on the Machine bed, this handwheel being connected to the pinion via a gear drive, characterized in that that the pinion includes a main gear (49) which is rotatable about the third axis (35) and in Drive connection with the handwheel (47) and with a gearwheel (64) which is attached to a shaft shaft (65) through the intermediate part rotatable about the second axis (41) (38) is carried and the pinion (69) carries that a temporarily freely rotatable first tooth part (61) is also provided is, which meshes with the main gear (49) that this tooth part (61) is arranged on a shaft (59), which is carried by the pivot plate (35), and that a clamping device is provided, which temporarily to block the first tooth part (61) is adjustable, whereby a latitudinal movement between the pivot mounting plate (55) and the machine bed (12), furthermore between the intermediate part (58) and the bearing pivot plate (55) as well between the feed slide (45) and the support piece (42) is prevented. 6. Grinding machine according to claim 5, characterized in that that the clamping device has a second tooth part (62) in a rotationally fixed connection with the first tooth part (61), and a transmission gear (52), 10983 - '] / 0313 - 3 - which meshes with the second tooth part (62) and is rotatable about the third axis (35), and that a clamping sleeve (55) is provided in connection with a clamping lever (56), which a locking of the transmission gear (52) opposite the machine bed (12) allows. 7. Grinding machine according to claim 6, characterized in that the two tooth parts (61,62) as integral step gear (57) are formed. 8 _e grinding machine according to claim 6 or 7, characterized in that the main gear (49) is in drive connection with the gear (64) by a further transmission gear (63). 109838/0313