WO2024022756A1 - Procédé de polissage, unité de nettoyage, dispositif de nettoyage et machine de polissage - Google Patents

Procédé de polissage, unité de nettoyage, dispositif de nettoyage et machine de polissage Download PDF

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Publication number
WO2024022756A1
WO2024022756A1 PCT/EP2023/068360 EP2023068360W WO2024022756A1 WO 2024022756 A1 WO2024022756 A1 WO 2024022756A1 EP 2023068360 W EP2023068360 W EP 2023068360W WO 2024022756 A1 WO2024022756 A1 WO 2024022756A1
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WO
WIPO (PCT)
Prior art keywords
cleaning
honing
unit
honing tool
spindle
Prior art date
Application number
PCT/EP2023/068360
Other languages
German (de)
English (en)
Inventor
Roland Regler
Georg Heinle
Original Assignee
Kadia Produktion Gmbh + Co.
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
Application filed by Kadia Produktion Gmbh + Co. filed Critical Kadia Produktion Gmbh + Co.
Publication of WO2024022756A1 publication Critical patent/WO2024022756A1/fr

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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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
    • 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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/10—Accessories
    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/007—Cleaning of grinding wheels
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant

Definitions

  • the invention relates to a honing process for machining an inner surface of a bore in a workpiece using at least one honing operation.
  • An expandable honing tool coupled to a spindle shaft of a spindle unit of a processing machine is inserted into the bore.
  • a lifting drive By means of a lifting drive, a reciprocating relative movement is generated between the honing tool and the bore and the honing tool is simultaneously rotated by means of a rotary drive to generate a rotary movement superimposed on the lifting movement.
  • At least one cutting material body attached to the honing tool is pressed against the inner surface with a feed force for material-removing processing of the inner surface, the lifting drive and the rotary drive being controlled by control signals from a control unit.
  • the invention also relates to a cleaning unit for cleaning a honing tool coupled to a spindle shaft of a spindle unit, to a cleaning device with such a cleaning unit and to a honing machine equipped with such a cleaning device for machining the inner surface of a bore in a workpiece.
  • Honing is a cutting process with geometrically undetermined cutting edges, in which a honing tool carries out a cutting movement consisting of two components within a hole to be machined and there is constant surface contact between one or more cutting material bodies of the honing tool and the inner surface of the hole to be machined.
  • Honing stones are generally used as cutting material bodies.
  • the kinematics of an expandable honing tool is characterized by a superposition of a rotary movement, a lifting movement that runs in the axial direction of the bore and is in most cases oscillating, and an infeed movement that leads to a change in the effective diameter of the honing tool.
  • On the inner surface of the bore there is a surface structure with crossing machining marks.
  • Honing involves working with bonded cutting grains with constant surface contact between the abrasive working surfaces of the honing tool or honing stones and the inner surface of the bore.
  • the work surfaces therefore usually have a more or less strong convex-cylindrical (or slightly conical) curvature.
  • the cutting grains are bound in a binding system and, together with the binding system, form a cutting coating.
  • the task of the binding system is to hold the bound cutting grains until they have become blunt due to the cutting process.
  • the blunted cutting grains are released so that new, still sharp-edged cutting grains can come into engagement with the workpiece (self-sharpening effect).
  • the cutting grains released by the cutting coating and/or the material removal or chips produced on the workpiece lead to adhesions on the honing tool, in particular on the at least one cutting material body or the at least one honing stone.
  • adhesions mean that after a certain number of honing operations, the finished surfaces of the workpieces no longer meet the high requirements in terms of dimensional and shape tolerances. For this reason, the honing stone is freed from these deposits by manual intervention, for example with sandpaper or a honing stone. To do this, the honing machine must be stopped in order to gain access to the honing tool.
  • the honing stones are also removed from the honing tool in order to clean the honing stones manually outside of the honing machine.
  • the cleaning of the honing tool or the honing strip therefore leads to a machine downtime and to an impairment of the productivity of the honing process.
  • the invention solves this problem by providing a honing process with the features of claim 1, a cleaning unit with the features of claim 9, a cleaning device with the features of claim 14 and a honing machine with the features of claim 16.
  • Advantageous developments of the invention are in specified in the subclaims, the wording of which is hereby incorporated by reference into the description. This includes in particular all embodiments of the Invention, which result from the combinations of features that are defined by the references in the subclaims.
  • the honing method comprises a cleaning operation for cleaning the honing tool coupled to the spindle shaft, wherein the honing tool is moved after a honing operation to carry out the cleaning operation by means of the lifting drive into a cleaning area of a cleaning device located outside the bore and is cleaned within the cleaning area by means of a cleaning liquid during the cleaning operation by jetting the cleaning fluid under pressure onto the outside of the honing tool.
  • the cleaning area of the cleaning device is preferably connected downstream of the workpiece to be machined along a spindle axis, so that the honing tool can be removed from the bore by a continuous translational lifting movement after the honing operation and introduced into the cleaning device to carry out the cleaning operation.
  • the cleaning device is preferably arranged stationary within a working area of a honing machine, wherein the honing tool can be moved through the cleaning device by means of the lifting drive.
  • this honing process offers advantages over conventional honing processes in terms of productivity, automation, machine downtime costs and/or tool intervention time.
  • This cleaning operation can be used to remove adhesions on the honing tool or on the at least one honing stone and to achieve consistent processing quality on the workpiece.
  • the cleaning operation is preferably carried out during machine downtime, i.e. during the time in which the honing machine is prepared for main use or is returned to its initial state. This is the case, for example, when changing the workpiece automatically and/or when returning the honing tool, so that no manual intervention is required to carry out the cleaning operation and there is no machine downtime for the honing machine.
  • the cleaning device has a cleaning unit which has a cleaning opening which is continuous in the axial direction and is enclosed by an inner surface of the cleaning unit, which has a nozzle arrangement in at least one axial section for generating at least one jet of cleaning liquid directed into the interior of the cleaning opening, wherein this Honing tool is cleaned using the cleaning liquid by moving the honing tool through the cleaning opening and the area of the nozzle arrangement using the lifting drive.
  • the cleaning opening of the cleaning unit preferably runs coaxially to the spindle axis.
  • the nozzle arrangement preferably has a single nozzle outlet opening, so that the honing tool is irradiated by a single jet of cleaning liquid during the cleaning operation.
  • the nozzle outlet opening is preferably designed in the form of an annular gap.
  • the nozzle arrangement in particular its jet angle and/or nozzle shape, can be determined through simple production.
  • the nozzle arrangement has a plurality of nozzle outlet openings arranged on the axial section of the cleaning opening, so that the honing tool is irradiated by several jets of cleaning liquid during the cleaning operation.
  • the cleaning opening can each have a nozzle arrangement in several axial sections.
  • the honing tool in the area of the nozzle arrangement is simultaneously irradiated with cleaning liquid from all sides of the circumference. Due to the full irradiation, all surfaces and edges on the outside of the honing tool and thus also the cutting material body or the honing stone are freed from adhesions.
  • the nozzle arrangement preferably has a single nozzle outlet opening extending over the entire circumference of a cleaning opening enclosed by an inner surface of the cleaning unit.
  • the nozzle arrangement has a plurality of nozzle outlet openings which are arranged distributed over the circumference of the cleaning opening.
  • the multiple nozzle outlet openings can be round or spot jet nozzles, for example.
  • a rotary movement of the honing tool may then be required, which can easily be carried out by the rotary drive of the spindle shaft.
  • the cleaning liquid is sprayed onto the outside of the honing tool under a high pressure of at least 20 bar.
  • the cleaning liquid is preferably sprayed onto the outside of the honing tool at a pressure of a maximum of 80 bar in order to avoid damage, particularly to the honing tool.
  • the cleaning operation is carried out automatically and the cleaning device has at least one pump to carry out the cleaning operation, which is configured in such a way that a pressure of the cleaning liquid and/or a cleaning duration of the cleaning operation is controlled.
  • the cleaning operation can be adjusted, regulated and controlled by suitable measures, such as pressure monitoring and flow measurement of the cleaning liquid, which can lead to constant cleaning results.
  • the cleaning operation can be designed as desired and adjusted according to the previously carried out honing operation.
  • the pump is preferably connected to a control unit of the honing machine. Are in If pressure and/or flow measuring devices are installed in the honing machine, the pump can be additionally or alternatively adjustable.
  • the cleaning device for carrying out the cleaning operation is connected to a pump circuit already present in the honing machine, so that no additional pump is required.
  • a cooling lubricant used in the honing operation is used as a cleaning liquid.
  • an existing cooling lubricant system can advantageously be used and the cleaning device can be connected to the existing cooling lubricant circuit of the honing machine.
  • the honing tool is cleaned cyclically according to a predetermined cleaning program during a honing process for the successive machining of a large number of workpieces.
  • the cleaning program can, for example, be specified according to a predetermined number of workpieces, after a certain honing processing time or tool engagement time, according to spindle torques occurring during honing processing, or based on an event.
  • the honing tool is moved into a calibration device while continuing the lifting movement, in which a calibration operation is carried out before a subsequent honing operation is carried out.
  • the honing tool is adjusted to a precise dimension.
  • the, preferably mechanical, calibration device of the cleaning device can be connected upstream of a spindle axis of the spindle shaft coaxially.
  • the calibration operation is preferably carried out after each cleaning operation. In alternative versions there is no calibration device. Cleaning is also possible without calibration.
  • the cleaning device for carrying out the cleaning operation is moved from a neutral position, in which the cleaning device is arranged outside a travel path of the honing tool in such a way that the honing tool can be inserted into the bore to be machined without diving through the cleaning device, into a cleaning position, in which the honing tool can be inserted into the cleaning device and the cleaning operation can be carried out.
  • the cleaning unit according to the invention has a cleaning opening which is continuous in an axial direction and is enclosed by an inner surface of the cleaning unit and into which the honing tool can be inserted.
  • the cleaning unit has a nozzle arrangement for generating at least one jet of cleaning liquid directed into the interior of the cleaning opening and at least one fluid supply channel for supplying a cleaning liquid to the nozzle arrangement.
  • the cleaning opening of the cleaning unit preferably runs coaxially to a spindle axis of the spindle shaft when the cleaning unit is in a fully assembled state.
  • the cleaning opening can each have a nozzle arrangement in several axial sections.
  • the fluid supply channel is fluidly connected to the nozzle arrangement on the fluid outlet side and to a valve and/or a pump device on the fluid inlet side.
  • the nozzle arrangement has an annular gap that runs continuously around the cleaning opening.
  • the circumferential annular gap of the nozzle arrangement enables full irradiation or cleaning of the honing tool, so that adhesions on all surfaces and edges on the outside of the honing tool and thus also on the cutting material body or the honing stone can be removed.
  • the cleaning unit has a fluid chamber which is fluidly connected to the nozzle arrangement. Through the fluid chamber, a cleaning liquid introduced therein under pressure is evenly distributed for supply to the nozzle arrangement.
  • the fluid chamber is annular, with the fluid chamber preferably enclosing the nozzle arrangement on the circumference.
  • the fluid chamber is preferably fluidly connected directly to the nozzle arrangement. The cleaning liquid can be fed into the fluid chamber via the fluid supply channel.
  • the cleaning unit has an upper part and a lower part, the two parts being detachably connected to one another.
  • the nozzle arrangement preferably has an annular gap which is formed between the upper part and the lower part of the cleaning unit.
  • the fluid supply channel is formed between the upper part and the lower part of the cleaning unit.
  • the cleaning unit has an upper part, a middle part and a lower part, which are detachably connected to one another.
  • the cleaning unit and a calibration unit are connected downstream of one another.
  • the calibration unit enables the honing tool to be calibrated or adjusted to an exact dimension. This represents an advantageous implementation for carrying out a honing operation following the cleaning operation.
  • the calibration unit is preferably connected upstream of the cleaning unit along a spindle axis of the spindle shaft, so that the cleaning unit is arranged between the workpiece to be machined and the calibration unit.
  • the cleaning unit and the calibration unit are preferably accommodated in a common cleaning calibration housing along a spindle axis of the spindle shaft. Additionally or alternatively, the cleaning unit and the calibration unit are aligned coaxially with one another.
  • the cleaning device comprises a cleaning unit according to the invention for cleaning a honing tool coupled to a spindle shaft of a spindle unit and at least one pump which is fluidly connected to the cleaning unit and is set up to convey a cleaning liquid into the cleaning unit.
  • the pump can be an additional or separate pump intended exclusively for carrying out the cleaning operation or a pump already present in the honing machine.
  • the cleaning unit is connected to a pump circuit already present in the honing machine.
  • a separate pump has the advantage that it can be designed to be adjustable and/or controllable and can therefore be adapted to the conditions of the necessary cleaning without affecting other functions, such as cooling and rinsing, in the honing machine.
  • the cleaning device is connected to a control unit in a signal-conducting manner and can be controlled by control signals from the control unit.
  • the controllable pump allows the cleaning operation to be designed as desired and adjusted in accordance with the previously carried out honing operation.
  • the control unit is preferably a control unit that is already integrated into the honing machine.
  • the honing machine according to the invention for machining the inner surface of a bore in a workpiece using at least one honing operation comprises a honing unit which has a spindle unit with a spindle shaft and a spindle axis.
  • a honing tool can be coupled directly or indirectly to the spindle shaft and has at least one cutting material body that can be pressed onto the inner surface of the bore for material-removing machining of the inner surface.
  • the spindle shaft is used to generate a lifting movement by means of a Lifting drive can be moved back and forth parallel to the spindle axis and, on the other hand, can be rotated about the spindle axis by means of a rotary drive to generate a rotary movement superimposed on the lifting movement.
  • the lifting drive and the rotary drive are connected in a signal-conducting manner to a control unit of the honing machine and can be controlled by control signals from the control unit.
  • a cleaning device according to the invention is assigned to the honing machine.
  • the invention also provides a retrofit kit which has a cleaning unit according to the invention for cleaning a honing tool coupled to a spindle shaft of a spindle unit.
  • the retrofit kit preferably has a pump device with connecting parts associated with the connection, on the one hand, to the cleaning unit and, on the other hand, to a cleaning fluid supply.
  • FIG. 1 shows a detail of a schematic perspective view of a honing machine with a cleaning unit for cleaning a honing tool coupled to a spindle shaft of a spindle unit;
  • Fig. 2 shows a schematic longitudinal section through a cleaning calibration device with a cleaning calibration housing and the cleaning unit inserted therein and
  • Fig. 3 shows a detail of a schematic longitudinal section of the cleaning calibration housing from Fig. 2, with the honing tool coupled to the spindle shaft being inserted into the cleaning unit.
  • FIG. 1 shows an oblique perspective view of a processing machine 3 in the form of a honing machine according to an exemplary embodiment.
  • Fig. 2 shows a longitudinal section through a cleaning calibration device 22 with a cleaning calibration housing 20 and a cleaning unit 9 inserted therein.
  • 3 shows an enlarged section of the cleaning calibration device 22 from FIG. 2, the honing tool 4 coupled to a spindle shaft 23 of a spindle unit 2 being inserted into the cleaning unit 9.
  • the honing machine 3 is set up to machine an inner surface of a hole in a workpiece 1 using at least one honing operation.
  • the honing machine 3 has a honing unit 21, as shown in FIG. 1.
  • An essential component of the honing unit 21 is the spindle unit 2, in which the spindle shaft 23 is rotatably mounted.
  • a rotary drive or spindle motor which is integrated into the spindle unit 2 and is not shown in the illustrations, is provided in the present case, which can drive the spindle shaft 23 about a spindle axis SA, i.e. about the axis of rotation of the spindle shaft 23, with a predetermined speed profile.
  • the spindle unit 2 is mounted on the front of a slide plate, not shown in FIG. 1, the slide plate being supported by a slide box 25, which serves as the base support of the honing unit 21.
  • a linear guide system for guiding a linear lifting movement of the spindle unit 2 relative to the slide box 25 is provided between the slide box 25 and the slide plate or the spindle unit 2 carried by it.
  • the lifting movement of the spindle unit 2 is parallel to the spindle axis SA.
  • a lifting drive is provided, for example an electrically linear direct drive.
  • the lifting drive and the rotary drive are connected in a signal-conducting manner to a control unit of the honing machine 3, not shown in the figures, and can be controlled by control signals from the control unit.
  • the control unit is a control unit already integrated into the honing machine 3.
  • the spindle shaft 23 has a device or a tool holder for directly coupling the honing tool 4 at a tool-side end 24, which is also referred to as the spindle nose.
  • the honing tool 4 is designed as a single-strip honing tool. Accordingly, the honing tool 4 for material-removing machining of the workpiece 1 has in its cutting area, which is located on the free end section of the honing tool 4, only a single cutting material body 5 which can be pressed against the inner surface of the bore. To carry out the honing machining, the cutting area of the honing tool 4 is in the Inserted inside the hole to be machined. The cutting material body 5 is present as Honing stone carried out.
  • a tool body 26 of the honing tool 4 has a rectangular honing stone receiving opening 38 which extends from the inside of the tool body 26 to the outside and in which the honing stone 5 is accommodated with a precise fit when the honing tool 4 is assembled.
  • the outer diameter of the tool body 26 varies in sections in the axial direction.
  • the honing tool 4 can be designed as a multi-bar honing tool.
  • the workpiece 1 to be machined is an elongated tube and is clamped at the end between an upper workpiece holder 27 and a lower workpiece holder 28, as can be seen in FIG. 1.
  • the two workpiece holders 27, 28 are guided on a console 30 by means of a linear guide system 29 and can be moved vertically.
  • the top of the upper workpiece holder 27 lies against the underside of the cleaning calibration device 22.
  • the console 30 is mounted on a turntable 31, which is rotatable about an axis of rotation. This enables the workpiece 1 to be pivoted out of the working area of the honing machine 3 and thereby makes it easier to carry out an automated workpiece change.
  • the honing machine 3 has a cleaning device 7, which in the example shown has a cleaning unit 9 for cleaning the honing tool 4 coupled to the spindle shaft 23 and a pump P.
  • the pump P is designed as a high-pressure pump for conveying fluids with a pressure of up to 80 bar and is fluidly connected to the cleaning unit 9 via a connecting part 33.
  • a further pump connection is provided for connecting a further pump, this pump connection being closed in a fluid-tight manner by a closure part 39, as can be seen in FIG. 2.
  • the one high-pressure pump P delivers the cleaning liquid into the cleaning unit 9.
  • FIG. 2 the delivery of the cleaning liquid into the interior of the cleaning unit 9 is shown schematically by arrows.
  • a check valve is preferably located between the connecting part 33 and the high-pressure pump P in order to prevent the line from running empty.
  • the flow and pressure of the cleaning liquid is preferably controlled by regulating the pump P (e.g. by a frequency converter).
  • the cleaning unit 9 is cylindrical and inserted in a form-fitting manner into the cleaning calibration housing 20 of the cleaning calibration device 22.
  • a sealing element 34 which is preferably dimensionally flexible, is inserted into the cleaning Calibration housing 20, in detail inserted into an insertion opening 36 arranged on the end face 35 of the cleaning calibration housing 20.
  • the sealing element 34 lies against the tool body 26 of the honing tool 4 on the circumference, allowing the linear lifting movement of the honing tool 4. This prevents cleaning liquid from escaping from the insertion opening 36, particularly when carrying out a cleaning operation.
  • the insertion opening 36 goes in an axial direction AR through the cleaning calibration device 22 to an outlet opening 40, the insertion opening 36 widening conically towards the end face 35. This makes it easier to insert the honing tool 4 into the cleaning calibration device 22.
  • the cleaning calibration device 22 is held in position by a holding device 32.
  • controllable components of the cleaning device 7 are connected in a signal-conducting manner to a control unit S shown schematically in the illustrations and can be controlled by control signals from the control unit S.
  • the control unit S is preferably already integrated in the honing machine 4 and is also set up to control the lifting drive and the rotary drive of the honing machine 4.
  • the cleaning unit 9 has a substantially cylindrical cleaning opening 11 which is continuous in the axial direction AR and is enclosed by an inner surface 10 of the cleaning unit 9.
  • the diameter of the cleaning opening 11 is adapted to the honing tool 4 in such a way that the honing tool 4 can be inserted into the cleaning opening 11 and a minimal gap is formed between the honing tool 4, in particular its maximum outer diameter, and the inner surface 10 of the cleaning opening 11.
  • the cleaning opening 11 runs coaxially to the spindle axis SA of the spindle shaft 23 in a fully assembled state of the cleaning unit 9.
  • the cleaning unit 9 has a nozzle arrangement 12 and two fluid supply channels 14, 14 ', which are set up to supply the cleaning liquid to the nozzle arrangement 12.
  • the nozzle arrangement 12 is arranged in an axial, lower section of the cleaning opening 11.
  • the nozzle arrangement 12 has a single nozzle outlet opening and is set up to generate a jet of cleaning liquid directed into the interior of the cleaning opening 11. This enables concentrated, targeted delivery of cleaning liquid into the interior of the cleaning opening 11.
  • the nozzle arrangement 12 is oriented obliquely downwards, with the cleaning liquid jet in the present case at an angle of approximately 55 ° onto the spindle axis SA or an outside 8 of the honing tool 4 meets.
  • the Nozzle arrangement 12 can be designed in such a way that the cleaning liquid jet is jetted onto the outside 8 of the honing tool 4 at an angle adapted to the needs or the honing tool 4, for example at an angle of 90 °, so that the cleaning liquid jet is perpendicular to the outside 8 of the honing tool 4 hits.
  • the cleaning liquid is preferably discharged from the cleaning calibration housing 20 via the outlet opening 40 after the cleaning operation.
  • the nozzle arrangement 12 has an annular gap 15 that runs continuously around the cleaning opening 11.
  • the nozzle arrangement 12 therefore corresponds to the type of a flat nozzle, so that a flat, concentrated jet of cleaning liquid hits the outside 8 of the honing tool 4 during the cleaning operation.
  • the circumferential annular gap 15 thus enables full irradiation or cleaning of the honing tool 4.
  • the cleaning unit 9 has a fluid chamber 16 which is fluidly connected to the nozzle arrangement 12.
  • the fluid chamber 16 is arranged in an axial, central section of the cleaning unit 9, above the nozzle arrangement 12.
  • the fluid chamber 16 is annular and completely surrounds the annular gap 15. This enables an even distribution of the cleaning liquid in the fluid chamber 16.
  • the cleaning liquid can be supplied to the fluid chamber 16 via the two fluid supply channels 14, 14 '.
  • the cleaning unit 9 is designed in two parts and has an upper part 17 and a lower part 18, which are particularly easy to manufacture, for example as turned parts. This makes it possible to adapt the nozzle shape and the jet angle of the nozzle arrangement 12 particularly easily.
  • the two parts 17, 18 are detachably held together with a central clamping nut, not shown in the figures.
  • the two parts 17, 18 can be connected to one another with a screw connection.
  • the nozzle arrangement 12 has the annular gap 15, which is formed between the upper part 17 and the lower part 18 of the cleaning unit 9.
  • the entire cavity structure of the cleaning unit 9, i.e. both the fluid supply channels 14, 14 'and the fluid chamber 16, is formed between the two parts 17, 18. Accordingly, the fluid supply channels 14, 14' and the fluid chamber 16 are also easy to adapt.
  • the cleaning unit 9 is connected upstream of a calibration unit 37.
  • the cleaning unit 9 and the calibration unit 37 are accommodated in a common cleaning calibration housing 20 along the spindle axis SA of the spindle shaft 23 and fixed in the axial direction AR.
  • To axially fix the cleaning unit 9 its lower end face 41 rests against an inner annular shoulder 42 of the cleaning calibration housing 20 in the direction of the outlet opening 40.
  • the cleaning unit 9 and the calibration unit 37 are aligned coaxially with one another.
  • a spacer sleeve 19 is arranged in the cleaning calibration housing 20, as shown in FIG. 2.
  • the spacer sleeve 19 ensures that the cleaning unit 9 is axially fixed in the direction of the insertion opening 36 in the cleaning calibration housing 20, and on the other hand, by simply adjusting an axial length of the spacer sleeve 19, the cleaning unit 9 can also be used in the cleaning calibration housing 20 that is adapted to the available installation space. In embodiments not shown, no calibration unit 37 is accommodated in the cleaning calibration housing 20.
  • the honing machine 3 can be operated with the honing process described below.
  • the honing process mentioned above includes a cleaning operation for cleaning the honing tool 4 coupled to the spindle shaft 23.
  • the honing tool 4 is moved after at least one honing operation by means of the lifting drive into the cleaning area 6 of the cleaning device 7 located above the bore.
  • the cleaning area 6 is connected downstream of the workpiece 1 to be machined along the spindle axis SA, so that after the honing operation the honing tool 4 is carried out of the bore by a single continuous translational lifting movement and is introduced into the cleaning device 7 to carry out the cleaning operation.
  • the honing tool 4 is cleaned within the cleaning area 6 using cleaning liquid by jetting the cleaning liquid completely onto the outside 8 of the honing tool 4 under pressure.
  • the cleaning liquid is discharged from the cleaning calibration housing 20 via the outlet opening 40.
  • the honing tool 4 is moved by means of the lifting drive through the cleaning opening 11 and the area of the nozzle arrangement 12 in such a way that at least the entire cutting area of the honing tool 4 is cleaned by the flat jet of cleaning liquid.
  • the honing tool 4 in the area of the nozzle arrangement 12 is simultaneously irradiated with cleaning liquid under high pressure (eg 25 to 40 bar) from all sides of the circumference.
  • cleaning liquid under high pressure eg 25 to 40 bar
  • the cleaning liquid is sprayed onto the outside 8 of the honing tool 4 under a high pressure of at least 20 bar. If possible, the high pressure should not be higher than approx. 80 bar in order to avoid damage to the honing tool, especially to the cutting material body.
  • the cleaning operation is carried out automatically.
  • the high-pressure pump P of the cleaning device 7 is configured such that a pressure of the cleaning liquid and/or a cleaning duration of the cleaning operation is controlled.
  • the cleaning operation can be adjusted, regulated and controlled by measures such as pressure monitoring and flow measurement of the cleaning liquid, whereby constant cleaning results can be achieved.
  • the cooling lubricant used in the honing operation is used as the cleaning fluid during the cleaning operation.
  • the cleaning device 7 is connected to an existing cooling lubricant circuit of the honing machine 3, so that the cleaning operation is carried out with the already existing cooling lubricant.
  • the honing tool 4 can be cleaned cyclically according to a predetermined cleaning program during a honing process for the successive machining of a large number of workpieces 1.
  • the cleaning program can, for example, be specified according to a specified number of workpieces 1, after a certain honing processing time or based on the occasion.
  • the honing tool 4 is moved into the calibration device 13 after the cleaning operation while continuing the lifting movement.
  • a calibration operation is carried out in the calibration device 13 before a further honing operation is subsequently carried out.
  • the honing tool 4 or the honing stone 5 is set to an exact, predetermined or predeterminable dimension.
  • the calibration device 13 has a calibration unit 37 in the form of a calibration ring, the inner diameter of which corresponds to the required dimension. The calibration operation is usually carried out after each cleaning operation.
  • the invention represents a honing process for machining the inner surface of a bore in one Workpiece, a cleaning unit for cleaning a honing tool coupled to a spindle shaft of a spindle unit, a cleaning device with such a cleaning unit and a honing machine equipped with such a cleaning device are available, which have advantages over the prior art, in particular with regard to productivity, automation, machine downtime costs, tool engagement time, maintenance and/or processing quality.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

2.1. L'invention concerne un procédé de polissage pour le traitement d'une surface intérieure d'un trou de forage dans une pièce à usiner au moyen d'au moins une opération de polissage. Un outil de polissage qui peut être élargi et qui est accouplé à un arbre de broche d'une unité de broche d'une machine de traitement est introduit dans le trou de forage. Au moyen d'un entraînement alternatif, un mouvement relatif de va-et-vient entre l'outil de polissage et le trou de forage est généré et l'outil de polissage est simultanément entraîné en rotation par un entraînement rotatif afin de générer un mouvement de rotation superposé au mouvement alternatif. Au moins un élément de coupe fixé à l'outil de polissage est pressé sur la surface interne avec une force d'application pour le traitement d'élimination de matériau de la surface interne, l'entraînement alternatif et l'entraînement rotatif étant commandés par des signaux de commande d'une unité de commande. 2.2. Selon l'invention, le procédé de polissage comprend une opération de nettoyage pour nettoyer l'outil de polissage couplé à l'arbre de broche. Après une opération de polissage, afin de réaliser l'opération de nettoyage, l'outil de polissage est déplacé dans une région de nettoyage (6) d'un dispositif de nettoyage (7) et situé à l'extérieur du trou de forage au moyen de l'entraînement alternatif, et celui-ci est nettoyé au moyen d'un fluide de nettoyage à l'intérieur de la région de nettoyage (6) pendant l'opération de nettoyage, dans laquelle le fluide de nettoyage est pulvérisé sous pression sur un côté extérieur de l'outil de polissage. 2.3. L'invention concerne une utilisation dans des machines de polissage pour nettoyer un outil de polissage couplé à l'arbre de broche.
PCT/EP2023/068360 2022-07-28 2023-07-04 Procédé de polissage, unité de nettoyage, dispositif de nettoyage et machine de polissage WO2024022756A1 (fr)

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DE102022207805.5A DE102022207805A1 (de) 2022-07-28 2022-07-28 Honverfahren, Reinigungseinheit, Reinigungseinrichtung und Honmaschine
DE102022207805.5 2022-07-28

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CN114770362A (zh) * 2022-06-21 2022-07-22 常州凯瑞莱精密工具有限公司 具有压力冷却圈的立式珩磨机

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DE2459822A1 (de) 1974-12-18 1976-06-24 Supfina Maschf Hentzen Druckspuelung zur sauberhaltung von honsteinen in vorrichtungen zur feinstbearbeitung zylindrischer werkstuecke
DE2540942C3 (de) 1975-09-13 1980-10-02 Maschinenfabrik Gehring Gmbh & Co Kg, 7302 Ostfildern Honvorrichtung
DE102005014096A1 (de) 2005-03-29 2006-10-05 Continental Teves Ag & Co. Ohg Verfahren und Vorrichtung zur Reinigung einer Zerspanungsmaschine

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CN107186608A (zh) * 2017-07-21 2017-09-22 上汽通用五菱汽车股份有限公司 珩磨头冲洗装置及珩磨机
CN214110027U (zh) * 2020-11-11 2021-09-03 上汽通用汽车有限公司 一种缸孔珩磨机
CN114770362A (zh) * 2022-06-21 2022-07-22 常州凯瑞莱精密工具有限公司 具有压力冷却圈的立式珩磨机

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