EP0041248A2 - Dispositif de brunissage d'une surface cylindrique de travail au moyen d'un outil de brunissage - Google Patents
Dispositif de brunissage d'une surface cylindrique de travail au moyen d'un outil de brunissage Download PDFInfo
- Publication number
- EP0041248A2 EP0041248A2 EP81104118A EP81104118A EP0041248A2 EP 0041248 A2 EP0041248 A2 EP 0041248A2 EP 81104118 A EP81104118 A EP 81104118A EP 81104118 A EP81104118 A EP 81104118A EP 0041248 A2 EP0041248 A2 EP 0041248A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cone
- setpoint
- desired value
- tool
- rolling
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
- B24B39/02—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working internal surfaces of revolution
- B24B39/023—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working internal surfaces of revolution the working tool being composed of a plurality of working rolls or balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
- B24B49/06—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent requiring comparison of the workpiece with standard gauging plugs, rings or the like
Definitions
- the invention relates to a device for smooth rolling a cylindrical workpiece surface with a smooth rolling tool, which can be designed as a tool for smooth rolling inner cylinder surfaces or as a tool for smooth rolling outer cylinder surfaces, the smooth rolling tool having a shank with a cone which is hollow in the outer smooth rolling tool, and one to the taper coaxially and axially relative to this displaceable cage with radially displaceable in the cage slots and on the conical surface of the cone facing the cylindrical workpiece surface, which can be rolled, has conical roller rolls, with a drive device which brings about a relative rotation and axial displacement of the cone and workpiece, and with a cone and cage automatically as a function of a predetermined, constant rolling pressure axially displacing adjusting device, the cone of the internal cold rolling tool is also hollow and the dimensioning of the wall thickness of the cone allows the wall to be deformed by the rolling pressure up to somewhat beyond the cone side facing away from the cylindrical workpiece surface, a deformation sensor is arranged on this cone side, the output variable
- the surface to be smoothed has a predetermined degree of completeness (the degree of completeness indicates how completely the space between the envelope surface and the base of the "surface rock" is filled with material) and a predetermined roughness in order to indicate the desired smoothness at a predetermined rolling pressure to achieve the workpiece surface. Since the preprocessing of the workpieces carried out before the smooth rolling is frequently not carried out uniformly for all workpieces, a correspondingly different rolling pressure setpoint would have to be selected in order to achieve a predetermined smoothness of the respective workpiece. This requires a measurement of the surface and readjustment of the setpoint device before each smooth rolling of a workpiece. However, manual measurement and readjustment is labor-intensive and time-consuming, especially for series production.
- the invention has for its object to improve the device according to the aforementioned German patent application (DE-A 29 35 601) in such a way that manual measurement of the workpiece surface and corresponding adjustment of the rolling pressure setpoint is eliminated.
- this object is achieved in that the plug is connected to a displacement transducer, that the setpoint generator has a setpoint correction unit and a basic setpoint generator for a basic setpoint of the rolling pressure, and that the output of the displacement transducer is connected to an input of the setpoint correction unit that the output of the setpoint correction unit is connected to the setpoint input of the comparator, that the setpoint correction unit corrects the basic setpoint depending on the distance traveled by the cone since the beginning of the rolling process until the basic setpoint is reached and feeds it to the comparator as a corrected setpoint.
- This solution is based on the knowledge that the distance traveled by the cone from the start of the smooth rolling process until the basic setpoint has been reached can be used as a measure of the initial degree of completeness or the roughness of the workpiece surface for adjusting or correcting the basic setpoint.
- the smaller this path the greater the initial degree of completeness and the higher the rolling pressure setpoint would have to be selected in order to achieve a desired smoothness.
- the larger the basic setpoint that is set the greater the distance. If the ratio of path to basic setpoint therefore exceeds a predetermined value, the required setpoint is lower, and vice versa. Accordingly, the basic setpoint is automatically lowered or raised, so that the required corrected setpoint results.
- the setpoint correction unit can form an electronic computer which automatically carries out all necessary correction calculations depending on the measured path of the cone and the set basic setpoint and corrects the setpoint accordingly.
- the drive device has a rotary drive acting on the workpiece and the non-rotatably held cone and the shaft of the inner smooth rolling tool are pierced.
- the measured variable of the deformation sensor can be taken off in a simple manner via a line which is led out through the cone bore, because the cone does not rotate and consequently the line is not twisted.
- the deformation sensor can have a pressure load cell. This is a particularly compact component that can be easily attached to the side of the cone facing away from the smooth rolling rollers.
- the deformation sensor preferably has a strain gauge. This is particularly sensitive to the smallest changes in deformation or pressure.
- the device shown in FIG. 1 has a smooth rolling tool 3 for smooth rolling the cylindrical inner surface 4 of a hollow cylindrical workpiece 5.
- the smooth rolling tool 3 has a cone 6 with a conical surface 7 the outside.
- tapered smooth rolling rollers 10 are rotatably and radially displaceable.
- the smooth rolling rollers 10 lie on the conical surface 7 so that the envelope surface of the smooth rolling rollers 10 is cylindrical.
- the cage 9 is rotatably supported by means of a radial ball bearing 11 in a carriage 12 which can be displaced on guide rails 13 by means of a drive device shown schematically as a double arrow 14.
- the workpiece 5 is rotated by a drive device shown schematically as an arrow 15, which can also provide for an axial displacement of the workpiece 5 instead of the drive device 14, as is indicated by the double arrow 16.
- the displacement of the carriage 12 or the workpiece 5 causes an axial relative displacement of the workpiece 5 and the cage 9 with the roller rolls 10, while the drive device 15 ensures the relative rotation of the workpiece 5 and the tool 3, the cone 6 in a manner not shown is held in a rotationally fixed manner so that the rolling rollers 10 roll on the inner surface 4 of the workpiece 5 and on the conical surface 7 of the cone 6 in order to smoothly roll the inner surface 4 of the workpiece 5.
- the cone 6 is also provided on its side facing away from the workpiece before the engagement of the tool and workpiece with a shaft 17, which at the same time forms the piston rod of a piston 18 in a cylinder 19.
- a deformation sensor 24 is arranged in a coaxial bore of the cone 6 in such a way that it bears against the inside 25 of the cone 6.
- the wall thickness of the cone 6 is dimensioned such that it essentially withstands the rolling pressure, but nevertheless permits deformation of the wall up to the inside 25, so that during operation the rolling pressure can be measured through the cone wall by means of the deformation sensor 24.
- the deformation sensor 24 can have a pressure or load cell, preferably with a strain gauge, in which a resistance wire, metal film, semiconductor, piezoelectric, magnetoelastic or inductive resistor is embedded, the resistance value of which is dependent on the strain or pressure. The change in resistance that occurs then represents a measure of the rolling pressure formed and can be measured in a measuring bridge.
- a device suitable for controlling the rolling pressure as a function of the measured rolling pressure is shown schematically in FIG. 2.
- An amplifier 28 then connects to line 26.
- the output signal of the amplifier 28 is fed to one input of an electrical comparator 29.
- the comparator 29 can be a differential amplifier of high gain with negative feedback (negative feedback), the feedback allowing adjustment of the control behavior of the control device.
- a rolling pressure setpoint generator 30 supplies a rolling pressure setpoint to the second input of the comparator 29.
- the comparator output signal becomes one digit direction supplied, which has a power amplifier 31, a controllable magnetic pressure reducing valve 32, the piston-cylinder arrangement 18, 19, an adjustable pressure reducing valve 33 and two pressure fluid pumps 34, 35.
- the output of the comparator 29 via the power amplifier 31 with the control input of the pressure reducing valve 32, the output of the pump 34 with the input of the pressure reducing valve 32 and the cylinder chamber 22, the output of the pump 35 with the input of the pressure reducing valve 33 and the cylinder chamber 20 and the outputs of the pressure reducing valves 32, 33 are connected to a pressure fluid container 36.
- the maximum pressures that can be output by the pumps 34, 35 are approximately the same and are dimensioned such that the pump 35 ' endeavors to develop at least as high a pressure as can be set on the pressure reducing valve 33, so that the pressure in the supply line to the cylinder chamber 20 is always limited to the value set on the pressure reducing valve 33 and kept constant, this pressure being lower than the maximum pressure of the pumps in the unloaded state.
- the same reduced pressure is then also effective in the cylinder chamber 20. It therefore determines the desired rolling pressure which is exerted on the inner surface 4 of the workpiece 5 via the piston 18, the cone 6 and the rolling rollers 10.
- the same rolling pressure is set on the setpoint generator 30 and on the pressure reducing valve 33.
- the comparator 29 and / or the amplifier 31 are designed such that even the slightest positive or negative output signal of the comparator 29 is sufficient to completely close the pressure reducing valve 32 or to open it completely.
- the pressure measurement quantity supplied to the comparator 29 exceeds the target value set on the target value transmitter 30, for example because the inner diameter of the tube decreases slightly as the workpiece 5 or the carriage 12 is advanced due to manufacturing tolerances, then the (positive) output signal of the comparator 29 which then occurs causes the pressure reducing valve 32 to be closed completely.
- the pressure in the cylinder chamber 22 increases very quickly up to the maximum pressure of the pump 34 and exceeds the setpoint set on the pressure reducing valve 35.
- the piston 18 and thus the cone 6 are displaced relative to the workpiece to the right in FIG. 1, so that the rolling pressure and thus the pressure measurement variable decrease below the value set on the setpoint generator 30.
- the pressure reducing valve 32 is immediately completely opened again and the pressure in the cylinder chamber 22 is completely reduced via the pressure reducing valve 32, so that again the pressure in the cylinder chamber 20 alone determines the rolling pressure.
- the rolling pressure continues to decrease below the setpoint specified by setpoint generator 30, e.g. Because the inner diameter of the workpiece 5 increases in the course of the axial relative movement of the workpiece and the tool, the pressure reducing valve 32 remains open, but the pressure prevailing in the cylinder chamber 20 then adjusts the cone 6 further to the left in FIGS. 1 and 2 until the Rollers 10 rest against the inner surface 4 of the workpiece to be smoothed again with the pressure set on the pressure reducing valve 33.
- the setpoint generator 30 contains a displacement transducer 37 connected to the shaft 17 of the cone 6, which measures the feed path covered by the cone 6 and converts it into an electrical signal. Furthermore, the setpoint generator 30 contains an adjustable basic setpoint generator 38 for a basic setpoint S 9 of the rolling pressure, one at the output of the Position transducer 37, setpoint correction unit 39 connected to the output of the actual value amplifier 28 and to the output of the basic setpoint generator 38, which supplies a corrected setpoint S k to the setpoint input of the comparator 29.
- the correction unit 39 contains a functional unit 40 and an adjustment unit 41.
- the functional unit 40 detects the path W measured from the beginning of the rolling process until the set basic setpoint S g is reached and forms the ratio of the basic path W g to the path W, ie W g / W .
- the basic path W is the path to be covered by the cone 6 in order to radially readjust the smooth rolling rolls on a workpiece with a predetermined preprocessing from the moment of the tool engagement until the desired basic setpoint S g of the rolling pressure is reached.
- the start of the rolling process is signaled to the functional unit 40 by the onset of the actual pressure value signal x supplied to it by the amplifier 28.
- the actual value signal x begins as soon as the cone 6 has brought the smooth rolling rolls (somewhat further than) to the surface of the workpiece to be smoothed.
- the ratio Wg / W determines the correction value which is fed to the adjustment unit 41 and which in dependence thereon increases or decreases the basic setpoint value S g , so that it increases a corrected setpoint S k results. Furthermore, the transmission factor of the adjustment unit 41 is adjustable.
- FIG. 3 represents a possible embodiment of the functional unit 40 and the matching unit 41.
- the displacement transducer 37 generates a pulse with each increment of the path covered by the cone 6, which is a measure of the deformation or smoothing of the workpiece surface caused during rolling. Its output is connected to the one input of a gate 42 in the form of an AND gate, to the output of which the pulse counting input of a counter 43 is connected.
- the other input of the gate 42 is connected to the set output of a flip-flop 44 (also called bistable flip-flop), which is also connected to a reset input of the counter 43.
- the set input of the flip-flop 44 is connected to the set output of a further flip-flop 45, the set input of which is at the output of the actual value amplifier 28.
- the output of the counter 43 is connected to the one input of a further gate 46, the output of which is at the input of a divider 47.
- the output of amplifier 28 is also connected to one input and the output of basic setpoint generator 38 to the other input of a further comparator 48.
- the output of the comparator 48 is monitored by a zero detector 49 which, when the output signal of the comparator 48 is zero, supplies a 1 signal to the other input of the gate 46 and via an OR gate 50 to the reset input of the flip-flop 44.
- the adjustment unit 41 also contains a transmission element 52 connected downstream of the multiplier with an adjustable transmission factor. The output of this transmission element 52 is connected to the setpoint input of the comparator 29. This link 52 enables the automatically corrected desired value Sk to be changed by hand in order, if desired, to set an even better or worse surface smoothness.
- a reset input 53 is also connected to the reset input of flip-flop 44 via OR gate 50 and directly to the reset input of flip-flop 45.
- the reset input 53 is supplied with a 1 signal as a reset signal by actuating a switch (not shown), which resets the two flip-flops 44 and 45.
- a signal indicating the rolling pressure insert appears at the output of the amplifier 28, which sets the flip-flop 45 so that it in turn sets the flip-flop 44.
- the 1 signal thus occurring at the set output of the flip-flop 44 resets the counter 43 to zero and at the same time scans the gate 42.
- the feed path pulses generated by the displacement transducer 37 from now on due to the further feed of the cone 6 during the rolling are therefore switched through the opened gate 42 to the pulse counting input of the counter 43.
- the divider 47 forms the ratio of Wg / W and transmits this to the multiplier 51, which multiplies it by the basic setpoint Sg, and the product is fed to the comparator 29 via the transmission element 52 with a transmission factor V weighted, which is normally chosen to be 1 . This means that the corrected setpoint applies
- the input variables S g and W of the multiplier 51 and the divider 47 can also be interchanged.
- An analog or digital electronic computer can be used to carry out the required arithmetic operations, including the comparison operations, the digital computer being a microprocessor and being connected on the input or output side to corresponding analog / digital converters or digital / analog converters .
- the flip-flop 45 can also be replaced by a differentiator, which only responds to the rising edge of the actual value signal x.
- a magnetic changeover valve can be used, which connects the output of the pump 34 or the input of the pressure reducing valve 33, controlled by the output signal of the comparator 29, to the cylinder chamber 20 or the cylinder chamber 22, e.g. with a positive output signal of the comparator 29 with the cylinder chamber 22 and with a negative or balanced (zero) output signal with the cylinder chamber 20.
- actuating device instead of the actuating device 18, 19, 31-35 shown, which converts the output signal of the comparator 29 into a proportional number of negative or positive pulses and feeds this to a stepper motor which adjusts the cone 6 axially causes a lead screw or pinion and rack and in the rest position, when the output signal of the comparator 29 is zero, assumes a position which corresponds to the rolling pressure setpoint specified by the setpoint generator 30.
- cone 6 can also be conical on the inside, so that the inner surface 25 and the outer surface 7 are parallel.
- the cone 6 can also be coupled with a rotary drive.
- the measurement signal of the sensor 24 can be made via sliding contacts or contactless, e.g. transmitted to the control device via optical, electromagnetic or acoustic waves.
- the power supply of the sensor 24 can also be carried out in the same way.
- the same rolling pressure control principle can then be used for an external smooth rolling tool, ie for a gat tool appropriate way for smooth rolling of workpiece outer surfaces, are used.
- the cone engages over the workpiece, ie it is hollow from the outset, and the roller rolls are mounted in a cage between the cone and the workpiece.
- the deformation sensor is designed and arranged so that it surrounds the cone on the outside.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3021101 | 1980-06-04 | ||
DE19803021101 DE3021101A1 (de) | 1980-06-04 | 1980-06-04 | Vorrichtung zum glattwalzen einer zylindrischen werkstueckflaeche mit einem glattwalzwerkzeug |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0041248A2 true EP0041248A2 (fr) | 1981-12-09 |
EP0041248A3 EP0041248A3 (en) | 1981-12-16 |
EP0041248B1 EP0041248B1 (fr) | 1983-11-09 |
Family
ID=6103911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81104118A Expired EP0041248B1 (fr) | 1980-06-04 | 1981-05-29 | Dispositif de brunissage d'une surface cylindrique de travail au moyen d'un outil de brunissage |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0041248B1 (fr) |
DE (1) | DE3021101A1 (fr) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0330734A2 (fr) * | 1988-02-29 | 1989-09-06 | Wilhelm Hegenscheidt Gesellschaft mbH | Outil d'écrouissage |
EP0460527A1 (fr) * | 1990-06-01 | 1991-12-11 | Matsushita Electric Industrial Co., Ltd. | Dispositif de transformation d'un alésage |
EP0503109A1 (fr) * | 1991-03-13 | 1992-09-16 | Wilhelm Hegenscheidt Gesellschaft mbH | Outil à galeter à rouleaux |
US5247819A (en) * | 1990-06-01 | 1993-09-28 | Matsushita Electrical Industrial Co. Ltd. | Bore processing device |
US6415486B1 (en) * | 2000-03-01 | 2002-07-09 | Surface Technology Holdings, Ltd. | Method and apparatus for providing a residual stress distribution in the surface of a part |
CN1094572C (zh) * | 1996-06-11 | 2002-11-20 | 住友重机械工业株式会社 | 内啮合行星齿轮结构中的内滚及外滚的制造方法 |
US6622570B1 (en) | 2000-03-01 | 2003-09-23 | Surface Technology Holdings Ltd. | Method for reducing tensile stress zones in the surface of a part |
US6926970B2 (en) | 2001-11-02 | 2005-08-09 | The Boeing Company | Apparatus and method for forming weld joints having compressive residual stress patterns |
US7568370B2 (en) * | 2003-01-21 | 2009-08-04 | Seagate Technology Llc | System and method for ballizing and measuring a workpiece bore hole |
EP2666590A2 (fr) * | 2012-05-22 | 2013-11-27 | Robert Bosch Gmbh | Procédé de roulage d'une surface de composant cylindrique |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3656333A (en) * | 1970-05-21 | 1972-04-18 | Clemens A Kruse Jr | Cylindrical surface finishing tool |
FR2298414A1 (fr) * | 1975-01-24 | 1976-08-20 | Cogsdill Tool Prod | Dispositif de polissage de surfaces cylindriques |
DE2935601A1 (de) * | 1979-09-04 | 1981-03-12 | Madison Industries Gmbh, 6078 Neu Isenburg | Vorrichtung zum glattwalzen einer zylindrischen werkstueckflaeche |
-
1980
- 1980-06-04 DE DE19803021101 patent/DE3021101A1/de not_active Withdrawn
-
1981
- 1981-05-29 EP EP81104118A patent/EP0041248B1/fr not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3656333A (en) * | 1970-05-21 | 1972-04-18 | Clemens A Kruse Jr | Cylindrical surface finishing tool |
FR2298414A1 (fr) * | 1975-01-24 | 1976-08-20 | Cogsdill Tool Prod | Dispositif de polissage de surfaces cylindriques |
DE2935601A1 (de) * | 1979-09-04 | 1981-03-12 | Madison Industries Gmbh, 6078 Neu Isenburg | Vorrichtung zum glattwalzen einer zylindrischen werkstueckflaeche |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0330734A2 (fr) * | 1988-02-29 | 1989-09-06 | Wilhelm Hegenscheidt Gesellschaft mbH | Outil d'écrouissage |
EP0330734A3 (en) * | 1988-02-29 | 1990-09-05 | Wilhelm Hegenscheidt Gesellschaft Mbh | Compacting tool |
EP0460527A1 (fr) * | 1990-06-01 | 1991-12-11 | Matsushita Electric Industrial Co., Ltd. | Dispositif de transformation d'un alésage |
US5247819A (en) * | 1990-06-01 | 1993-09-28 | Matsushita Electrical Industrial Co. Ltd. | Bore processing device |
EP0503109A1 (fr) * | 1991-03-13 | 1992-09-16 | Wilhelm Hegenscheidt Gesellschaft mbH | Outil à galeter à rouleaux |
CN1094572C (zh) * | 1996-06-11 | 2002-11-20 | 住友重机械工业株式会社 | 内啮合行星齿轮结构中的内滚及外滚的制造方法 |
US6415486B1 (en) * | 2000-03-01 | 2002-07-09 | Surface Technology Holdings, Ltd. | Method and apparatus for providing a residual stress distribution in the surface of a part |
US6622570B1 (en) | 2000-03-01 | 2003-09-23 | Surface Technology Holdings Ltd. | Method for reducing tensile stress zones in the surface of a part |
US6926970B2 (en) | 2001-11-02 | 2005-08-09 | The Boeing Company | Apparatus and method for forming weld joints having compressive residual stress patterns |
US7568370B2 (en) * | 2003-01-21 | 2009-08-04 | Seagate Technology Llc | System and method for ballizing and measuring a workpiece bore hole |
US7788961B2 (en) | 2003-01-21 | 2010-09-07 | Seagate Technology, Llc | System and method for ballizing and measuring a workpiece bore hole |
EP2666590A2 (fr) * | 2012-05-22 | 2013-11-27 | Robert Bosch Gmbh | Procédé de roulage d'une surface de composant cylindrique |
EP2666590A3 (fr) * | 2012-05-22 | 2017-05-03 | Robert Bosch Gmbh | Procédé de roulage d'une surface de composant cylindrique |
Also Published As
Publication number | Publication date |
---|---|
EP0041248B1 (fr) | 1983-11-09 |
DE3021101A1 (de) | 1981-12-10 |
EP0041248A3 (en) | 1981-12-16 |
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