EP1181132A1 - Rough-grinding and finish-grinding a crankshaft in a clamping - Google Patents

Rough-grinding and finish-grinding a crankshaft in a clamping

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Publication number
EP1181132A1
EP1181132A1 EP20000927018 EP00927018A EP1181132A1 EP 1181132 A1 EP1181132 A1 EP 1181132A1 EP 20000927018 EP20000927018 EP 20000927018 EP 00927018 A EP00927018 A EP 00927018A EP 1181132 A1 EP1181132 A1 EP 1181132A1
Authority
EP
European Patent Office
Prior art keywords
grinding
crankshaft
finish
sec
bearings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20000927018
Other languages
German (de)
French (fr)
Other versions
EP1181132B1 (en
Inventor
Erwin Junker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Erwin Junker Maschinenfabrik GmbH
Original Assignee
Erwin Junker Maschinenfabrik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Priority to DE1999119893 priority Critical patent/DE19919893A1/en
Priority to DE19919893 priority
Application filed by Erwin Junker Maschinenfabrik GmbH filed Critical Erwin Junker Maschinenfabrik GmbH
Priority to PCT/EP2000/003633 priority patent/WO2000066323A1/en
Publication of EP1181132A1 publication Critical patent/EP1181132A1/en
Application granted granted Critical
Publication of EP1181132B1 publication Critical patent/EP1181132B1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7906535&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1181132(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36Single-purpose machines or devices
    • B24B5/42Single-purpose machines or devices for grinding crankshafts or crankpins

Abstract

The present invention relates to a method for grinding a centrally clamped crankshaft (1). The invention also relates to a grinding machine (43) for crankshafts for carrying out said method and a crankshaft (1) consisting of high-alloy steel or cast. According to the inventive method, lifting bearings (12) and main bearings (11) of the crankshaft (1) are ground in a clamping in such a way that at least the main bearings (11) are rough-ground and subsequently the lifting bearings (12) and then the main bearings (11) are finish-ground. The grinding machine (43) for crankshafts forms a working centre by means of which corresponding rough-grinding and finish-grinding are possible in one single clamping.

Description

Pre- and finish grinding a crankshaft in one set

The present invention relates to a method of grinding a concentrically clamped crankshaft, and a crankshaft grinding machine for performing the method.

The grinding of crankshafts is carried out in known procedures in several steps on different machines in a plurality of operations on specially equipped grinders. Another method and a corresponding apparatus are known from DE 43 27 807th There, a crankshaft with an axial train between Aufhahmespitzen a Werkstückspindel- and tailstock of a grinding machine is clamped. In this setup all bearings, lifting bearings, flanges, studs and end faces of the crankshaft are finish-ground. are being introduced at least two appropriately contoured grinding wheels.

Thus it is known from the prior art in that, for a crankshaft is manufactured or more processing stages on a plurality of grinding finish-ground in a single clamping operation.

The object of the invention is to develop a method for grinding crankshafts and an apparatus with which are dimensions, shape and machining tolerances of the crankshaft improved and the processing time is reduced. This object is achieved with a method of grinding a concentrically clamped crankshaft with the features of claim 1, comprising a crankshaft grinding machine for performing the method with the features of claim 12 and by a crank shaft of high-alloy steel or cast material with the features of claim 19 , Advantageous developments and embodiments are specified in the dependent claims.

An inventive method of grinding a concentrically clamped crankshaft provides that the rod bearings and main bearings are ground in a single clamping such that first at least pre-grinding the main bearings and subsequently the rod bearings and then the main bearings are finish-ground. After an exemplary preliminary cutting machining is thus to

Achieve a required quality in relation to specified dimensions, shape and position tolerances, the crankshaft for several processing stages in a

Stretching up from the rough-up to the subsequent finish grinding

Finished size left. Firstly, it is saved in this way, time which is otherwise for modification of the machine or for switching on and re-breakdown

Crankshaft would be needed. On the other hand it is possible by the claimed approach of grinding, that the time of grinding

Bearing released stresses in the material are compensated for as far as that after the processing distortion of the crankshaft is eliminated.

A further development provides that the rod bearings are pre-ground in addition to the main bearings. Advantageously, the grinding of the crank bearings is carried out after the grinding of the main bearings. Since bearing points of different crankshafts usually have different shapes, such as with lateral radii or recesses, it is achieved by a grinding of the crankshaft, as indicated above, to avoid the resulting of liberated stresses in the crankshaft delay on the finished product. Using forward as finish grinding the flat sides can thereby be also ground without the desired tolerance values ​​are exceeded after the finish grinding.

A particularly preferred field of use of the method as well as the crankshaft grinding machine, the production of crankshafts and tempered steel has been found. In a preceding heat treatment, with these, a particularly great risk that the crankshaft to warp due to liberated during the grinding process stress in the workpiece. By the claimed method of this delay is eliminated again in the finish grinding.

A refinement of the method provides that the rough and the finish grinding is carried out with a single grinding wheel. Another method provides that the rough and the finish grinding takes place, each with a grinding wheel. By contrast, it allows the use of a grinding wheel for pre and a grinding wheel for finish grinding, to exploit different grinding wheel specifications and dimensions for which different processing. A further refinement of the method provides that the main bearing and pin bearing the upstream, each with a grinding wheel and are finish-ground. Pin bearings as main bearing may have different machining tolerances. By an appropriate assignment of a grinding wheel to be worked kind of bearings of the crankshaft, it is possible to make a corresponding adjustment of the grinding wheel specification used.

It is advantageous if it is ground with a CBN grinding wheel. On the one hand, this allows high cutting speeds, on the other hand, this disc just a little wear on. The service life of the grinding wheel and thus the sum of the possible intervention time increases significantly so. Further permits the CBN grinding wheel to be able to maintain high tolerance requirements. Instead of CBN grinding wheels as well as corundum can be used.

Particularly good results in terms of improving tolerances have arisen when a CBN grinding wheel with a

Cutting speed between 40 m / sec and 140 m / sec, preferably sec sets and between 80 m / sec to 120 m for galvanic CBN wheels between 80 m / sec and 200 m / sec, preferably between 100 m / sec to 140 m / sec. Furthermore, also corundum be in a range of preferably 35 m / sec to 100 m / sec, use insbeondere 45 m / sec to 70 m / sec. These values ​​may vary slightly upwards as well as downwards, for example in function of the dimensions of the crankshaft and the geometries to be processed on this, on the exact composition of the

Grinding wheel, as required by the surface quality etc ..

For longer crankshafts, the problem arises that when machining the crankshaft tends to oscillate. Therefore, according to a further development of the method, at least one main bearing is ground as a steady rest for the suppression of vibrations and for supporting the crankshaft to bending by the machining forces during grinding of the main bearings. In this way, the non-supported portion of the crankshaft is shortened. Furthermore, the use of the bezel allows flexing due to the own weight of the crankshaft in association with the rotation preventing during processing.

Especially long crankshafts are in one piece with high accuracy requirements produced by the above process, as needed, for example for car and truck engines with a length of about 300 millimeters. On the other hand, the above method is suitable also for the production of crankshafts for example, small motors, having a length of 100 mm and more. Furthermore, the invention provides a crankshaft grinding machine for performing the method according to any one of claims 1 to 11, having a tailstock and a workpiece headstock available. Between the tailstock and the workpiece headstock with a crankshaft main bearings and Hublagem is centrally clamped. Furthermore, the crankshaft grinding machine has at least one grinding spindle head and at least one grinding wheel. The grinding machine is a machining center, by means of which in a single setup at least the main bearings of the crankshaft after the pin bearing, and then the main bearings with a grinding wheel and at least finish-vorschleifbar.

The crankshaft grinding machine is a machining center so because the crankshaft is not exclusively for rough and finish grinding and must be clamped in another machine. On the other hand, the crankshaft grinding machine necessary for the rough and finish grinding labor resources. Further, separately from the existing processing center work equipment is not required. Preferably, a CBN wheel is used as a grinding wheel. This allows to provide high quality precision low processing times.

A development of the crankshaft grinding machine provides that are arranged on the wheelhead a first and a second grinding wheel, the crankshaft being finish-grinding wheel by means of the first and vorschleifbar means of the second grinding wheel. In this manner, the crankshaft grinding machine permitting be used over different types of grinding wheels, on the other hand with different cutting speeds as well as adapted to the respective grinding wheel, the crankshaft can be produced. Preferably, the crankshaft grinding machine is constructed so that by means of the first grinding disc the main bearings upstream and forward the finish-rod bearings and by means of the second grinding wheel and finish-. In this way, the grinding wheel used and its machining operation can be precisely tailored depending on the required tolerance range. This allows to achieve a long service life of the grinding wheels used in high processing quality.

Another aspect of the crankshaft grinding machine provides that at least two headstocks with at least one each of a grinding wheel are provided, wherein the crankshaft with two forward wheels and is finish-. A further development of this embodiment provides that two headstocks on one side of the grinding machine and a further headstock disposed on the side opposite side of the grinding machine and each carry at least one grinding wheel. This allows the simultaneous engagement of different sides on the crankshaft. Thus, the processing time can be further shortened. Depending on the length of the crankshaft to be machined crankshaft grinding machine is also correspondingly extended by further headstocks. The machining center is for a modular design, so that adapted to different crankshafts for

Use upcoming devices such as work headstock, tailstock,

can be wheelhead etc. selected and incorporated

When processing due to the engagement of one or more wheels on the crankshaft may occur twist along their length. This leads to a positional deviation of parts of the crankshaft during processing, which reduces the quality of processing. It has been found that this indeed low, but to be achieved for the finished nevertheless significantly affecting ligand torsional forces are over compensated in that the tailstock has a drive which is electrically coupled to a drive of the workpiece spindle head so that the two drives are synchronized. Occurring cutting forces on the crankshaft are absorbed well, and avoided a twist over the length of the crankshaft. High quality requirements are attainable for a crankshaft made of cast iron or high alloy steel when prepared in the machining center, wherein in a single setup at least upstream the main bearing and then the rod bearings and the main bearings are finish-ground. This is particularly noticeable at a length of at least 100 millimeters, in particular at least 300 mm of the crankshaft generated due to the tolerance grades. A crankshaft, which has been prepared in this way has in particular maximum runout tolerances for the main bearings, which are less 0.01 mm.

The above-mentioned pre-grinding by the crankshaft grinding machine is possible in two variants:

1. pre-grinding using a ceramically bonded CBN grinding wheel is used from the blank to an intermediate for finish-grinding, preferably with an electroplated CBN grinding wheel and the second pre-grinding after previous machining processes of stock to an intermediate size and then finish grinding, preferably.

For the following, described in the drawing description of example the rough machining as described in item 2, applied. However, it may by different combination of the grinding wheel and grinding wheel arrangements is also a pre-grinding, as indicated in item 1 can be realized. After the rough according to the points 1, 2, the crankshaft is finish ground according to the method described above.

The following figure shows the invention by way of example and discussed these and other advantageous features, which can be combined with the previously already mentioned. In the drawings: Figure 1 is an illustration of a crankshaft clamped to illustrate the problem of achieving high quality.

Fig. 2, a main bearing with lateral recesses according to detail Y from FIG. 1,

Fig. 3 is a pin bearing with lateral radii and ground flanks according to detail W from FIG. 1,

Fig. 4 shows a cross section of a first bearing point,

Fig. 5 is a cross section of a second bearing position,

Fig. 6 is a simplified plan view of a first crankshaft grinding machine,

Fig. 7 shows an embodiment of a wheel head and

Fig. 8 is a simplified plan view of a second crankshaft grinding machine.

Fig. 1 shows an illustration of a clamped crankshaft 1. This is clamped in a chuck 2 which is flanged on a workpiece spindle 3 of a workpiece headstock, not shown. In the center of the chuck 2 is a first peak 4, on which the crank shaft 1 is centrally aligned. A radial entrainment of the crankshaft 1 is made by clamping jaws 5 of the chuck 2, which span an outer periphery of a flange 6 of the crankshaft. 1 Another shaft end of the crankshaft 1 is supported by a second tip 7 of a tailstock. 9 The second tip 7 of the tailstock 9 is seated on an axially displaceable sleeve. 8 The tailstock 9 may also, as though not shown here instead be equipped with a second tip 7 with a further chuck as the workpiece spindle head. The clamping jaws of this clamp chuck then on a pin end 21 of the crankshaft 1. The crankshaft 1 is under slight pressure, atmospheric pressure or also be clamped under axial train. A drive the crankshaft 1 is carried out according to the illustrated in Fig. 1 embodiment in such a manner that the crankshaft is driven to rotate 1 by a main bearing 11 centrally through the workpiece spindle 3 with the chuck 2. The drive is designed as a CNC axis, cf.. Arrow Cl. In an expanded embodiment also the tailstock 9 may be provided instead of just having a second tip 7 with a driven tailstock (CNC axis C2). Furthermore, a grinding spindle 30 is shown with a grinding wheel 31st The grinding spindle 30 is received by a non-illustrated wheel head housing that is movable in the direction of the axis X by means of a CNC-axis. The workhead with the chuck 2 and tailstock 9 are mounted on a not-shown grinding table which is movable in the direction of a Z axis. The crankshaft 1 is clamped such that its central axis 13 is aligned exactly with the central axes of the workpiece spindle 3 and the tailstock sleeve. 8 A support of the crank shaft 1, for example by means of a bezel 10 which is mounted on the grinding table. The bezel 10 may be attached in the axial direction at a predetermined main bearing. 11 The grinding of the crank shaft 1 can be carried out with different variants of the grinding spindle assemblies so that different crankshaft grinding design versions are possible. Some variations are evident from the subsequent FIGS. 6 to 8 projects.

As shown in Fig. 1, engages the grinding wheel 31 to the crankshaft 1 a. Particularly in the case of high-alloy steel, for example with an appropriate proportion of chromium, molybdenum and vanadium, or a corresponding casting quality, for example GGG 60/70/80, there is a risk that a distortion to the crankshaft 1 occurs over its length due to machining. In this case, deviations of up to 0.4 mm have been measured. Accordingly, it has not been possible to be able to meet the required high quality with regard to specified tolerances with high-quality materials that are extremely vulnerable to distortion during processing. The fact that now at least the

forward main bearing and then the rod bearings and the main bearings are finish-ground, the so eliminated in the processing by the released voltages that the occurring delay is eliminated in the subsequent operation, and for example, even concentricity tolerances of 0.01 mm and be less adhered to the main bearings can. The concentricity tolerance is preferably measured between the first and last stock. If only two main bearings are provided, the concentricity tolerance is preferably determined by measuring between the two peaks. Maintaining a maximum concentricity tolerance is particularly important, therefore, as a result of

Storage in the engine where only small tolerances are permitted. tolerances on

However, pin bearings in relation to the lifting height may optionally be larger since only determine these motor in the position of the top dead center and the bottom dead center.

When selecting the material of the crankshaft must also be noted that, among other things, as well as by the hardening process of the crankshaft, it is dependent on whether the rough and finish grinding of the rod bearings takes place in a single operation. It should be noted that lower voltages and resulting distortion may occur in particular in cast shafts.

Fig. 2 shows a main bearing 11 with lateral recesses according to a detail Y of FIG. 1 is illustrated by the main bearing 11 of the crank shaft 1, as also previously known contours can be achieved with the method and the crankshaft grinding machine already. The lateral grooves result from the preliminary cutting machining. A rough size of the crank shaft 1 is represented by a dashed line 203rd When rough grinding with a grinding wheel 104 having an abrasive layer 205 is pre-ground to a rough size 202nd The rough size 202 is greater than the aimed finished size in diameter. This is shown for the main bearing 11 with a contour of the two hundred and first The two flat sides 206 of the main bearing 11 of the crankshaft 1 are not ground in this application example.

Fig. 3 shows a rod bearings 12 with side radii and ground flanks according to detail W from FIG. 1. The pin bearing 12 has lateral radii, as well as a low flat shoulder pre-ground. When finished grinding the radius is not completely also ground because it is not applied in the bearing shell of the motor housing with crankshaft first The bearings shown in FIGS. 2 and 3 can be performed on a pin journal and the main bearing and likewise reversed.

Fig. 4 shows a cross section of a bearing of the crankshaft 1. This is preferably a pin bearing, wherein the bearing point is completely cut with the lateral radii and the corresponding flat sides.

Fig. 5 shows a further cross-section of a bearing. A dot-dash center line constitutes a generating line of a cylinder. For this purpose, displaced to a few micrometers, has the bearing surface on a convex shape, indicated by the dashed line. The solid line shows an opposite shape of the bearing surface. This also has only a few microns in their maximum distance from the center line of the generatrix. Such a convex or concave shape can be produced via a corresponding down direction of the grinding wheel according to the method described above employed.

To achieve the best possible results in terms of quality, there are several possibilities according to the method for grinding the main and rod bearings: for example, all main bearings including the steady rest are pre-sanded first. the pin bearings are then pre-ground with the same or a second wheel. After the grinding of the rod bearings which are then finish ground to the finished size and then finish-ground main bearing. The rough and finish grinding of the rod bearings can also be done in one operation, depending on the type of crankshaft. common to all variants that all the main and pin bearings of the crankshaft are machined in one set on pre- or final dimension, regardless of the chosen crankshaft grinding machine.

Fig. 6 shows a simplified plan view of a first crankshaft grinding machine 43. On a machine bed are not shown on a grinding table, a workpiece headstock 40 and the tailstock 9 is mounted. The grinding table is movable in known manner in the direction of the CNC axis z. A grinding headstock 42 serves for receiving a grinding spindle 30 which receives a grinding wheel. The wheelhead 42 is disposed on a guide which is movable in the direction of the x-axis. The CNC axial directions X and Z are preferably arranged perpendicular to each other. The machining center illustrated enables a once clamped crankshaft 1 forward according to the method described above and is finish ground, without requiring a re-clamping is required. This compliance also less tolerance zones succeed.

Fig. 7 shows a configuration of a wheel head 36. The wheel head 36 has a first grinding spindle I and a second grinding spindle II. These are received in a grinding headstock casing and can thereby be pivoted in a horizontal direction. On the one hand this permits either the first grinding spindle I or the second grinding spindle II is used. On the other hand, this also enables that a first spindle 32 relative to a second spindle 34 can be designed differently. ' For example, different speed ranges are thus structurally predetermined. Further allows the wheelhead 36 that different grinding wheels can be used. For example, a first grinding wheel 33 may be a corundum, while a second grinding wheel 35 is a CBN wheel. Also permits the construction of the wheel head 36 that different diameter grinding wheels are used on a wheel head. With a corresponding spatial allocation of the construction allows the wheelhead 36 also that a grinding wheel is engaged to the crankshaft, while the other grinding wheel is free. For this, the wheel head 36 is horizontally pivotable. In addition to various sizes and different materials, the grinding wheels also can also make a difference in their quality to be achieved. So one is a grinding disc may be, while the other is a finishing wheel.

Fig. 8 shows a second crankshaft grinding machine 44. This machine realizes a concept in which the machining center comprises two wheel heads. Each wheel head has independent CNC axes X and Z. That is, the respective grinding disc of a grinding headstock can be used at a different bearing of the crankshaft according to a CNC program independently of the other. This machine concept can be extended by further grinding headstocks. In particular for space utilization, it is advantageous if the two wheel heads is arranged, for example by two opposing opposite to an additional grinding headstock. Such an arrangement with simultaneous engagement has the advantage that on the crankshaft oppositely acting forces cancel each other. The spatial configuration of the machining center is also available so that a grinding headstock is directly opposite to a side of the crankshaft, a grinding spindle head on an opposite side of the crankshaft. LIST OF REFERENCE NUMBERS

crankshaft

chuck

Tool spindle first peak

jaws

Flange second peak

Pinole

tailstock

bezel

main bearing

pin bearings

central axis

pin end

grinding spindle

Grinding wheel first spindle first grinding wheel spindle second second grinding wheel

S chlei fspindelstock

Workhead

machine bed

Wheelhead first crankshaft grinding machine second crankshaft grinding machine 201 contour

202 rough size

203 blank dimension

204 grinding wheel abrasive layer 205

206 page plan

I first grinding spindle

II second grinding spindle

Cl driving the CNC axis of the tool spindle

C2 drive the CNC axis of Reitstockspinole

X CNC-axis Z-axis CNC

Claims

P atentanspr ü che
1. A method of grinding a concentrically clamped crankshaft (1) (1), whose stroke bearings are (12) and main bearings (11) in one clamping such that initially pre-ground at least the main bearings (11) and then the stroke bearings (12) and then the main bearings (11) are finish-ground.
2. The method of claim 1, wherein the pin bearing (12) are rough-ground.
3. The method of claim 2, wherein the pin bearing (12) of the of the main journals (11) are rough-ground.
4. The method according to any one of claims 1 to 3, wherein the rough-grinding and finish grinding with a single grinding wheel
done; (204 31).
carried 5. A method according to any one of claims 1 to 3, wherein the rough-grinding and finish grinding with a respective grinding wheel (204 31).
6. A method according to any one of claims 1 to 3, wherein at least the main bearings (11) and the stroke bearings (12) each having a grinding wheel (31; 204) upstream and are finish-ground.
7. The method of claim 4, 5 or 6, in which ground with a corundum wheel.
8. The method of claim 4, 5 or 6, in which ground with a CBN wheel '<.
9. The method of claim 7, wherein the cutting speed of the corundum wheel is in the range of 35 m / sec to 100 m / sec, preferably 45 m / sec to 100 m / sec, in particular 45 m / sec is up to 70 m / sec ,
10. The method of claim 8, wherein the cutting speed for ceramic CBN wheels at 40 m / sec to 140 m / sec, in particular 80 m / sec to 120 m / sec, and galvanic CBN wheels at 80 m / sec to 200 m / sec, in particular 100 m / sec is / sec to 140 m. 5
11. The method according to any one of claims 1 to 10, wherein during rough-grinding of the main bearings (11) at least one main bearing (11) and steady rest (10) is ground.
0 12. crankshaft grinding machine (43; 44) for carrying out the method according to one of claims 1 to 11 (with a tailstock (9) and a workpiece spindle head (40), between which a crankshaft (1) with main bearings (11) and Hublagem 12) is centrally clamped, (with at least one grinding spindle head 36) and at least one 5 grinding wheel (31; 204), characterized in that the grinding machine (43; 44) a machining center, by means of which in a single setup, at least the main bearings (11) the crankshaft (1) and thereafter vorschleifbar whose stroke bearings (12) and 0, then the main bearings (11) with the at least one
Grinding wheel (31; 204) are finish-.
3. crankshaft grinding machine (43; 44) according to claim 12, characterized in that the grinding wheel (31; 204) is a CBN wheel.
14. crankshaft grinding machine (43; 44) according to claim 11, 12 or 13, characterized in that on the wheelhead (36) are arranged in a first (33) and a second grinding wheel (35), wherein the crankshaft (1) by means of the first grinding wheel (33) is finish-vorschleifbar and by means of the second grinding wheel (35).
15, crankshaft grinding machine (43; 44) according to claim 14, characterized in that by means of the first grinding wheel (33) upstream and the main bearings (11) finish-and by means of the second grinding wheel (35), the pin bearing (12) upstream and are finish-.
16 crankshaft grinding machine (43; 44) according to claim 11, 12 or 13, characterized in that at least two spindle heads each having a grinding wheel are provided with at least, wherein the crankshaft (1) with the one of the grinding wheels and with the vorschleifbar other of
Finish-grinding wheels.
17 crankshaft grinding machine (43; 44) according to claim 16, characterized in that two headstocks on one side of the grinding machine and a further headstock disposed on the side opposite side of the grinding machine and each carry at least one grinding wheel.
18 crankshaft grinding machine (43; 44) according to any one of claims 11 to 17, characterized in that the tailstock (9) has a drive (C2) electrically connected to a drive (Cl) of the workhead (40) coupled so in that both drives (Cl, C2) are synchronized.
19, crankshaft (1) of high-alloy steel or cast material, wherein in a single set forth at least the main bearings (11) and then the stroke bearings (12) and the main bearings (11) are finish-ground.
20, the crankshaft (1) according to claim 19, having a length of at least 100 mm.
wherein the main bearing (11) have a maximum run-out tolerance of 0.01 mm 21, the crankshaft (1) according to claim 19 or 20.
EP20000927018 1999-04-30 2000-04-20 Rough-grinding and finish-grinding a crankshaft in a clamping Active EP1181132B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE1999119893 DE19919893A1 (en) 1999-04-30 1999-04-30 Pre- and finish grinding a crankshaft in one set
DE19919893 1999-04-30
PCT/EP2000/003633 WO2000066323A1 (en) 1999-04-30 2000-04-20 Rough-grinding and finish-grinding a crankshaft in a clamping

Publications (2)

Publication Number Publication Date
EP1181132A1 true EP1181132A1 (en) 2002-02-27
EP1181132B1 EP1181132B1 (en) 2003-06-11

Family

ID=7906535

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000927018 Active EP1181132B1 (en) 1999-04-30 2000-04-20 Rough-grinding and finish-grinding a crankshaft in a clamping

Country Status (10)

Country Link
US (1) US6878043B1 (en)
EP (1) EP1181132B1 (en)
JP (1) JP2002542955A (en)
CN (1) CN1157276C (en)
AU (1) AU4554600A (en)
CZ (1) CZ302536B6 (en)
DE (2) DE19919893A1 (en)
ES (1) ES2198307T3 (en)
RU (1) RU2240218C2 (en)
WO (1) WO2000066323A1 (en)

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US8506357B2 (en) 2008-02-01 2013-08-13 Erwin Junker Maschinenfabrik Gmbh Method for grinding the main and rod bearings of a crankshaft by external cylindrical grinding and apparatus for carrying out the method
US9108287B2 (en) 2009-11-03 2015-08-18 Erwin Junker Maschinenfabrik Gmbh Method for grinding the main and rod bearing of a crankshaft by external cylindrical grinding

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DE10200774A1 (en) * 2002-01-10 2003-07-31 Hegenscheidt Mfd Gmbh & Co Kg Machine tool for machining the thrust bearing of crankshafts
DE10235957B4 (en) * 2002-08-06 2005-01-20 Hegenscheidt-Mfd Gmbh & Co. Kg Process for finishing crankshafts for motor vehicle engines
DE10302685A1 (en) * 2003-01-15 2004-08-05 Muhr Und Bender Kg Grinding apparatus for camshafts, has grinding tools, which move to and fro with respect to the workpieces on each holder via tool setting guides, each with grinding disks respectively rotated by rotary driving tools to grind workpieces
DE10308292B4 (en) * 2003-02-26 2007-08-09 Erwin Junker Maschinenfabrik Gmbh Method of cylindrical grinding in the manufacture of tools made of hard metal and cylindrical grinding machine for grinding cylindrical starting bodies in the manufacture of tools made of hard metal
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CN1360534A (en) 2002-07-24
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CZ20013878A3 (en) 2002-08-14
DE50002544D1 (en) 2003-07-17
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AU4554600A (en) 2000-11-17
RU2240218C2 (en) 2004-11-20
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DE19919893A1 (en) 2000-11-09
CN1157276C (en) 2004-07-14

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