EP0123956A2 - Cylindrical grinding machine for external and internal grinding with a numerical control device - Google Patents

Cylindrical grinding machine for external and internal grinding with a numerical control device Download PDF

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Publication number
EP0123956A2
EP0123956A2 EP84103729A EP84103729A EP0123956A2 EP 0123956 A2 EP0123956 A2 EP 0123956A2 EP 84103729 A EP84103729 A EP 84103729A EP 84103729 A EP84103729 A EP 84103729A EP 0123956 A2 EP0123956 A2 EP 0123956A2
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EP
European Patent Office
Prior art keywords
grinding
external
longitudinal
slide
internal
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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
EP84103729A
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German (de)
French (fr)
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EP0123956A3 (en
EP0123956B1 (en
Inventor
Jivko Stoev Dipl.-Ing. Atanassov
Aram Dikran Dipl.-Ing. Garabedjan
Peter Gantschev Dipl.-Ing. Petrov
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Institut SA Metalorejeschti Maschini
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Institut SA Metalorejeschti Maschini
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    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/01—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor for combined grinding of surfaces of revolution and of adjacent plane surfaces on work
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/12—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces both externally and internally with several 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/14—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding conical surfaces, e.g. of centres

Definitions

  • the invention relates to a cylindrical grinding machine for external and internal grinding with NC control, in particular for grinding workpieces with multi-stage outer and inner cylindrical or conical surfaces for bushes, flanges, gears, etc.
  • a cylindrical grinding machine for external and internal grinding with NC control which has a body with longitudinal guides which are provided with a protective shield, a headstock with a spindle unit, a grinding support for external and face grinding and a grinding support for internal grinding being mounted on the body are.
  • the headstock with the spindle unit is mounted on a left longitudinal slide which is guided by the longitudinal guides of the body and is driven by a feed mechanism for the longitudinal feed.
  • the grinding support for external and internal grinding is mounted on a slide with a feed mechanism at an angle to the cross slide.
  • the cross slide is guided by longitudinal guides that are attached to a support that is firmly connected to the body.
  • the cross slide has its own feed mechanism.
  • the grinding support for internal grinding is on a right longitudinal Carriage mounted with feed mechanism, which is mounted on a second cross slide, which is guided on second cross guides, which are mounted on the right side of the body.
  • the second cross guides are mounted on a bridge with the possibility of a transition to the left longitudinal slide of the headstock.
  • a diamond roller for dressing the grinding wheel for external and face grinding In the middle of the spindle unit of the headstock there is a diamond roller for dressing the grinding wheel for external and face grinding, which is pushed out by a hydraulic cylinder during dressing outside the chuck.
  • a second diamond roller for dressing the grinding wheel for internal grinding is mounted on the cross slide of the grinding support for external and face grinding.
  • the slide of the grinding support for external and face grinding arranged at an angle and the right longitudinal slide of the support for internal grinding are only driven when the corresponding grinding wheels are dressed (DD-PS 84 808).
  • the disadvantages of the known cylindrical grinding machine for external and internal grinding are: the complicated kinematics of the support for external and face grinding, which essentially consists of two supports, one of which is only used for dressing the wheel; using an expensive diamond roller with a large diameter for dressing the wheel for external grinding, moreover it does not achieve a high smoothness of the machined workpieces; a longitudinally immovable support for the internal grinding, which leads to large distances between the faces of the discs for external and internal grinding in the working position, which in turn favors the occurrence of errors in the mutual arrangement of the inner and outer surfaces of the machined workpieces; the impossibility of machining a base and an attachment with programmable movements of tapered inner and outer surfaces when combined with outer and inner cylindrical surfaces and forehead surfaces appear in a workpiece; the need to manually change the machine when moving workpieces of one type to another with significant preparation time.
  • the invention has for its object to provide a cylindrical grinding machine for external and internal grinding with NC control, in which the grinding is guaranteed with a base and an attachment of workpieces with multi-stage outer and inner cylindrical and conical surfaces and end faces, namely at high accuracy of their mutual arrangement and the ability to quickly change when changing the type of workpieces.
  • a cylindrical grinding machine for external and internal grinding with NC control which consists of a body in the upper part of which longitudinal guards provided with a protective shield are formed, a headstock with a spindle unit, a grinding support for external grinding and a grinding support for internal grinding , the headstock being mounted on a left longitudinal slide which is guided by a feed device over the longitudinal guides of the body and the support for external grinding consists of a slide which is guided over transverse guides mounted on a support, this support being firmly connected to the body is, and on the carriage is a feed device and a plate with grinding spindle for external cylindrical grinding and a support for internal grinding, the latter consisting of a cross slide, which carries a grinding spindle for internal grinding, guided over guides w ird and is equipped with a device for cross feed.
  • the cross slide of the internal grinding support is mounted on a longitudinal slide which is guided over the longitudinal guides of the body by a device for longitudinal feed.
  • the following devices are installed above the protective shield between the headstock and the grinding support for internal grinding: one for active control during external grinding, one for active control during internal grinding and one for dressing the grinding wheel for internal grinding.
  • a device for the axial positioning of the machined workpiece is mounted on the grinding support for external grinding, and a device for dressing the grinding wheel for external and face grinding is mounted on the headstock at the level of the axis of the machined workpiece.
  • a hydraulic drive cylinder and two hydraulic locking cylinders are mounted on the rotating plate of the headstock.
  • the advantages of the machine according to the invention are: the possibility of automatic grinding of multi-stage inner and outer cylindrical and conical surfaces and end faces when fastening the workpieces and with high accuracy of their mutual arrangement; increasing dimensional accuracy by using facilities to actively control and zero the system when machining is complete; increasing the dressing accuracy of the grinding wheel for external grinding and, as a result, achieving a high smoothness of the machined surfaces; the rapid automatic changeover of the machines when changing the type of workpieces the simple kinematics with essential technological possibilities.
  • a left longitudinal slide 2 and a right longitudinal slide 3 are mounted on the longitudinal guides of the body 1 (FIGS. 1 and 2). These can be set in motion along the body 1 with the aid of two mechanisms of the same construction for longitudinal feed - left 4a and right 4b.
  • a rotatable plate 5 is mounted on the left longitudinal slide 2 with the possibility of angular rotation for grinding conical (outer and inner) surfaces with the help of a hydraulic drive cylinder 6.
  • the rigid attachment and detachment of the rotatable plate 5 to the left longitudinal slide 2 is carried out by two hydraulic locking cylinders 7.
  • the headstock 8 with the spindle 9 mounted therein is rigidly attached, at the front end of which a chuck 10 is fixed with manual, hydraulic or other type of actuation for fastening the machined workpiece 11.
  • a console-type dressing device 12 for dressing the circumference and the end face of the outer grinding wheel 13 is mounted on the headstock 8 in the level of the axis of the machined workpiece 11.
  • a transverse slide 14 with the possibility of a transverse movement is mounted with the aid of a device for transverse advancement of the inner grinding wheel 15.
  • a spindle unit 16 for internal grinding is mounted, which carries a spindle 17 for internal grinding.
  • the arrangement of the spindle 17 to the inner loop may be either parallel to the axis of the machined workpiece 11 (Fig. 3) or at an angle to ⁇ (FIG. 4) take place.
  • a linear measuring system 18 On the side surface of the right longitudinal slide 3, the housing of a linear measuring system 18 is attached, which is provided for the photoelectric measurement of the displacement of the cross slide 14, on which a slider 19 is rigidly mounted.
  • a hydraulic cylinder 20 is rigidly attached to the upper surface of the cross slide 14, with the aid of which a lining 21 of the inner grinding wheel 22 is fed and removed.
  • a protective shield 23 is rigidly mounted on the longitudinal guides of the body 1 and passes through cavities formed by the two parts of the left longitudinal slide 2 and the right longitudinal slide 3.
  • a support 27 is rigidly attached, on the upper part, perpendicular or at an angle of 60 ° with respect to the axis of the machined workpiece 11, the transverse guides 28 on which the Support for external grinding 29 is mounted with the possibility of cross feed using a device 30 for cross feed of the external grinding wheel.
  • a spindle unit 31 for external grinding and a device 32 for axial orientation of the machined workpiece 11 are mounted in the front part of the support 29 for external grinding.
  • the spindle unit 31 for external grinding can be mounted on the support 29 for external grinding in two positions: vertically or at an angle of 15 to 20 ° with respect to the transverse guides 28.
  • the arrangement of the spindle unit 31 for external grinding at an angle of 15 to 20 ° becomes with the transverse guides 28 arranged vertically with respect to the axis 11 of the machined workpiece, in order to ensure the simultaneous peripheral grinding of its cylindrical surfaces and end faces.
  • An NC control system 33 and an electrical cabinet 24 are rigidly attached to the left part of the body 1.
  • the straight position of the rotatable plate 5 for grinding cylindrical surfaces is fixed by the rear adjustable stop 35. and the rotated position for grinding tapered surfaces through the front adjustable stop 36.
  • the end face and the circumference of the outer grinding wheel 13 are dressed by the console-like dressing device 12 during movements along the controllable axes X1 and Z1 (FIG. 10).
  • the end face and the circumference of the inner grinding wheel 22 are dressed by the rotatable dressing device 26, after it has been rotated into the working position by the hydraulic device 37, during movements along the controllable axes X2 and Z2.

Abstract

1. Numerically controlled cylindrical grinding machine for external and internal grinding, having a machine base body (1) with longitudinal guides ; a work piece mounting support with a work piece spindle stock (8) on a first longitudinal slide (2) which is guided by the longitudinal guides ; having an external grinding device with an external grinding carriage (29) ; and having an internal grinding device with a cross slide (14) and a second longitudinal slide (3), characterised in that the second longitudinal slide (3) is arranged on the longitudinal guides of the machine base body (1), the internal grinding cross slide (14) being provided on the second longitudinal slide (3) ; in that a rotatable plate (5) is located between the first longitudinal slide (2) and the work piece spindle stock (8) ; and in that the external grinding carriage (29) has a device (32) for axially positioning the processed work piece (11).

Description

Die Erfindung betrifft eine Rundschleifmaschine zum Außen- und Innenschleifen mit NC-Steuerung, insbesondere zum Schleifen von Werkstücken mit mehrstufigen äußeren und inneren zylindrischen oder kegeligen Flächen für Buchsen, Flansche, Zahnräder u.a.The invention relates to a cylindrical grinding machine for external and internal grinding with NC control, in particular for grinding workpieces with multi-stage outer and inner cylindrical or conical surfaces for bushes, flanges, gears, etc.

Es ist eine Rundschleifmaschine zum Außen- und Innenschleifen mit NC-Steuerung bekannt, die einen Körper mit Längsführungen aufweist, welche mit einem Schutzschild versehen sind, wobei am Körper ein Spindelstock mit Spindeleinheit, ein Schleifsupport zum Außen- und Stirnschleifen und ein Schleifsupport zum Innenschleifen montiert sind. Der Spindelstock mit der Spindeleinheit ist an einem linken Längsschlitten montiert, der von den Längsführungen des Körpers geführt wird und von einem Vorschubmechanismus zum Längsvorschub angetrieben wird. Der Schleifsupport zum Außen- und Innenschleifen ist auf einem Schlitten mit einem Vorschubmechanismus unter einem Winkel zum Querschlitten montiert. Der Querschlitten wird von Längsführungen geführt, die an einer fest mit dem Körper verbundenen Stütze befestigt sind. Der Querschlitten besitzt einen eigenen Vorschubmechanismus. Der Schleifsupport zum Innenschleifen ist an einem rechten Längsschlitten mit Vorschubmechanismus montiert, der an einem zweiten Querschlitten montiert ist, der auf zweiten Querführungen geführt wird, die an der rechten Seite des Körpers montiert sind. Die zweiten Querführungen sind auf einer Brücke montiert mit der Möglichkeit zum übergang zum linken Längsschlitten des Spindelstocks. In der Mitte der Spindeleinheit des Spindelstocks ist eine Diamantrolle für das Abrichten der Schleifscheibe zum Außen- und Stirnschleifen montiert, die durch einen hydraulischen Zylinder beim Abrichten außerhalb des Futters hinausgeschoben wird. Am Querschlitten des Schleifsupports zum Außen- und Stirnschleifen ist eine zweite Diamantrolle für das Abrichten der Schleifscheibe zum Innenschleifen montiert. Der unter einem Winkel angeordnete Schlitten des Schleifsupports zum Außen- und Stirnschleifen und der rechte Längsschlitten des Supports zum Innenschleifen werden nur beim Abrichten der entsprechenden Schleifscheiben angetrieben (DD-PS 84 808).A cylindrical grinding machine for external and internal grinding with NC control is known, which has a body with longitudinal guides which are provided with a protective shield, a headstock with a spindle unit, a grinding support for external and face grinding and a grinding support for internal grinding being mounted on the body are. The headstock with the spindle unit is mounted on a left longitudinal slide which is guided by the longitudinal guides of the body and is driven by a feed mechanism for the longitudinal feed. The grinding support for external and internal grinding is mounted on a slide with a feed mechanism at an angle to the cross slide. The cross slide is guided by longitudinal guides that are attached to a support that is firmly connected to the body. The cross slide has its own feed mechanism. The grinding support for internal grinding is on a right longitudinal Carriage mounted with feed mechanism, which is mounted on a second cross slide, which is guided on second cross guides, which are mounted on the right side of the body. The second cross guides are mounted on a bridge with the possibility of a transition to the left longitudinal slide of the headstock. In the middle of the spindle unit of the headstock there is a diamond roller for dressing the grinding wheel for external and face grinding, which is pushed out by a hydraulic cylinder during dressing outside the chuck. A second diamond roller for dressing the grinding wheel for internal grinding is mounted on the cross slide of the grinding support for external and face grinding. The slide of the grinding support for external and face grinding arranged at an angle and the right longitudinal slide of the support for internal grinding are only driven when the corresponding grinding wheels are dressed (DD-PS 84 808).

Die Nachteile der bekannten Rundschleifmaschine zum Außen- und Innenschleifen sind: die komplizierte Kinematik des Supports zum Außen- und Stirnschleifen, der im wesentlichen aus zwei Supporten besteht, von denen einer nur für das Abrichten der Scheibe verwendet wird; das Verwenden einer teuren Diamantrolle mit großem Durchmesser für das Abrichten der Scheibe zum Außenschleifen, außerdem kann dadurch keine hohe Glätte der bearbeiteten Werkstücke erzielt werden; ein in Längsrichtung unbeweglicher Support für das Innenschleifen, was zu großen Entfernungen zwischen den Stirnflächen der Scheiben für das Außen- und Innenschleifen in der Arbeitsposition führt, was seinerseits das Entstehen von Fehlern in der gegenseitigen Anordnung der inneren und äußeren Oberflächen der bearbeiteten Werkstücke begünstigt; die Unmöglichkeit der Bearbeitung bei einer Basis und einer Befestigung mit programmierbaren Bewegungen von kegeligen inneren und äußeren Oberflächen, wenn sie in Kombination mit äußeren und inneren zylindrischen Flächen und Stirnflächen in einem Werkstück auftreten; die Notwendigkeit manueller Umstellung der Maschine beim Übergang von Werkstücken eines Typs zu einem anderen mit bedeutender Vorbereitungszeit.The disadvantages of the known cylindrical grinding machine for external and internal grinding are: the complicated kinematics of the support for external and face grinding, which essentially consists of two supports, one of which is only used for dressing the wheel; using an expensive diamond roller with a large diameter for dressing the wheel for external grinding, moreover it does not achieve a high smoothness of the machined workpieces; a longitudinally immovable support for the internal grinding, which leads to large distances between the faces of the discs for external and internal grinding in the working position, which in turn favors the occurrence of errors in the mutual arrangement of the inner and outer surfaces of the machined workpieces; the impossibility of machining a base and an attachment with programmable movements of tapered inner and outer surfaces when combined with outer and inner cylindrical surfaces and forehead surfaces appear in a workpiece; the need to manually change the machine when moving workpieces of one type to another with significant preparation time.

Der Erfindung liegt die Aufgabe zugrunde, eine Rundschleifmaschine zum Außen- und Innenschleifen mit NC-Steuerung zu schaffen, bei der das Schleifen bei einer Basis und einer Befestigung von Werkstücken mit mehrstufigen äußeren und inneren zylindrischen und kegeligen Flächen und Stirnflächen gewährleistet ist, und zwar bei hoher Genauigkeit ihrer gegenseitigen Anordnung und der Möglichkeit zum schnellen Umstellen beim Wechseln des Typs der Werkstücke.The invention has for its object to provide a cylindrical grinding machine for external and internal grinding with NC control, in which the grinding is guaranteed with a base and an attachment of workpieces with multi-stage outer and inner cylindrical and conical surfaces and end faces, namely at high accuracy of their mutual arrangement and the ability to quickly change when changing the type of workpieces.

Diese Aufgabe wird erfindungsgemäß durch eine Rundschleifmaschine zum Außen- und Innenschleifen mit NC-Steuerung gelöst, die aus einem Körper besteht, in dessen oberen Teil mit Schutzschild versehene Längsführungen ausgebildet sind, aus einem Spindelstock mit Spindeleinheit, einem Schleifsupport zum Außenschleifen und einem Schleifsupport zum Innenschleifen, wobei der Spindelstock auf einem linken Längsschlitten montiert ist, der durch eine Vorschubvorrichtung über die Längsführungen des Körpers geführt wird und der Support zum Außenschleifen aus einem Schlitten besteht, der über auf einer Stütze montierten Querführungen geführt wird, wobei diese Stütze fest mit dem Körper verbunden ist, und an dem Schlitten sich eine Vorschubvorrichtung und eine Platte mit Schleifspindel zum äußeren stirnzylindrischen Schleifen und ein Support zum Innenschleifen befindet, wobei der letztgenannte aus einem Querschlitten besteht, der eine Schleifspindel zum Innenschleifen trägt, über Führungen geführt wird und mit einer Vorrichtung zum Quervorschub ausgerüstet ist.This object is achieved according to the invention by a cylindrical grinding machine for external and internal grinding with NC control, which consists of a body in the upper part of which longitudinal guards provided with a protective shield are formed, a headstock with a spindle unit, a grinding support for external grinding and a grinding support for internal grinding , the headstock being mounted on a left longitudinal slide which is guided by a feed device over the longitudinal guides of the body and the support for external grinding consists of a slide which is guided over transverse guides mounted on a support, this support being firmly connected to the body is, and on the carriage is a feed device and a plate with grinding spindle for external cylindrical grinding and a support for internal grinding, the latter consisting of a cross slide, which carries a grinding spindle for internal grinding, guided over guides w ird and is equipped with a device for cross feed.

Erfindungsgemäß ist zwischen dem linken Längsschlitten und dem Spindelstock eine drehbare Platte montiert, und der Querschlitten des Supports zum Innenschleifen ist an einen Längsschlitten montiert, der durch eine Vorrichtung zum Längsvorschub über die Längsführungen des Körpers geführt wird. über dem Schutzschild zwischen dem Spindelstock und dem Schleifsupport zum Innenschleifen sind folgende Einrichtungen montiert: eine zur aktiven Kontrolle beim Außenschleifen, eine zur aktiven Kontrolle beim Innenschleifen und eine für das Abrichten der Schleifscheibe zum Innenschleifen. An dem Schleifsupport zum Außenschleifen ist eine Einrichtung für die axiale Positionierung des bearbeiteten Werkstücks montiert, und an dem Spindelstock ist im Niveau der Achse des bearbeiteten Werkstücks eine Einrichtung für das Abrichten der Schleifscheibe zum Außen- und Stirnschleifen montiert. An der drehbaren Platte des Spindelstocks sind ein hydraulischer Antriebszylinder und zwei hydraulische Verriegelungszylinder montiert.According to the invention is between the left longitudinal slide and a rotating plate is mounted on the headstock, and the cross slide of the internal grinding support is mounted on a longitudinal slide which is guided over the longitudinal guides of the body by a device for longitudinal feed. The following devices are installed above the protective shield between the headstock and the grinding support for internal grinding: one for active control during external grinding, one for active control during internal grinding and one for dressing the grinding wheel for internal grinding. A device for the axial positioning of the machined workpiece is mounted on the grinding support for external grinding, and a device for dressing the grinding wheel for external and face grinding is mounted on the headstock at the level of the axis of the machined workpiece. A hydraulic drive cylinder and two hydraulic locking cylinders are mounted on the rotating plate of the headstock.

Die Vorteile der erfindungsgemäßen Maschine, mit der die Nachteile der bekannten Maschinen vermieden werden, sind: die Möglichkeit des automatischen Schleifens von mehrstufigen inneren und äußeren zylindrischen und kegeligen Flächen und Stirnflächen bei einem Befestigen der Werkstücke und bei hoher Genauigkeit ihrer gegenseitigen Anordnung; die Erhöhung der Maßgenauigkeit durch Verwendung von Einrichtungen zur aktiven Kontrolle und Nullieren des Systems bei Beendigung der Bearbeitung; die Erhöhung der Abrichtgenauigkeit der Schleifscheibe zum Außenschleifen, und als Folge das Erzielen einer hohen Glätte der bearbeiteten Oberflächen; das schnelle automatische Umstellen der Maschinen bei Wechsel des Typs der Werkstücke; die einfache Kinematik bei wesentlichen technologischen Möglichkeiten.The advantages of the machine according to the invention, with which the disadvantages of the known machines are avoided, are: the possibility of automatic grinding of multi-stage inner and outer cylindrical and conical surfaces and end faces when fastening the workpieces and with high accuracy of their mutual arrangement; increasing dimensional accuracy by using facilities to actively control and zero the system when machining is complete; increasing the dressing accuracy of the grinding wheel for external grinding and, as a result, achieving a high smoothness of the machined surfaces; the rapid automatic changeover of the machines when changing the type of workpieces the simple kinematics with essential technological possibilities.

Die Erfindung soll nachstehend an einem Ausführungsbeispiel der erfindungsgemäßen Rundschleifmaschine näher erläutert werden. In den zugehörigen Zeichnungen zeigen:

  • Fig. 1 eine Gesamtansicht der Maschine von oben, aus der die gegenseitige Anordnung der Arbeitselemente ersichtlich ist;
  • Fig. 2 einen Längsschnitt der Maschine durch den Spindelstock, den Innenschleifsupport und die Vorrichtungen für ihr Verschieben;
  • Fig. 3 ein Schema der parallelen Anordnung der Achsen des bearbeiteten Werkstücks und der Spindel zum Innenschleifen;
  • Fig. 4 ein Schema der Anordnung der Spindel zum Innenschleifen unter einem Winkel in bezug auf die Achse des bearbeiteten Werkstücks,
  • Fig. 5 ein Schema der axialen Orientierung des bearbeiteten Werkstücks;
  • Fig. 6 ein Schema des Schleifens von äußeren mehrstufigen Oberflächen;
  • Fig. 7 ein Schema des Schleifens von inneren mehrstufigen Oberflächen;
  • Fig. 8 ein Schema des Schleifens einer inneren kegeligen Oberfläche;
  • Fig. 9 ein Schema des Schleifens einer äußeren kegeligen Oberfläche,
  • Fig.10 ein Schema des Abrichtens der Scheiben zum Außen- und Innenschleifen.
The invention is illustrated below in one embodiment game of the cylindrical grinding machine according to the invention will be explained in more detail. In the accompanying drawings:
  • Figure 1 is an overall view of the machine from above, from which the mutual arrangement of the working elements can be seen.
  • 2 shows a longitudinal section of the machine through the headstock, the internal grinding support and the devices for moving it;
  • Figure 3 is a schematic of the parallel arrangement of the axes of the machined workpiece and the spindle for internal grinding.
  • 4 shows a diagram of the arrangement of the spindle for internal grinding at an angle with respect to the axis of the machined workpiece,
  • 5 shows a diagram of the axial orientation of the machined workpiece;
  • Fig. 6 is a schematic of the grinding of outer multi-stage surfaces;
  • Fig. 7 is a schematic of grinding inner multi-stage surfaces;
  • Fig. 8 is a schematic of grinding an inner tapered surface;
  • 9 is a schematic of grinding an outer tapered surface.
  • Fig. 10 is a diagram of the dressing of the disks for external and internal grinding.

Auf den Längsführungen des Körpers 1 (Fig. 1 und 2) sind ein linker Längsschlitten 2 und ein rechter Längsschlitten 3 montiert. Diese können mit Hilfe von zwei Mechanismen gleicher Konstruktion für Längsvorschub - linker 4a und rechter 4b - längs des Körpers 1 in Bewegung gesetzt werden. Auf dem linken Längsschlitten 2 ist eine drehbare Platte 5 montiert mit der Möglichkeit zum winkeligen Drehen für das Schleifen von kegeligen (äußeren und inneren) Oberflächen mit Hilfe eines hydraulischen Antriebszylinders 6. Das starre Befestigen und das Loslösen der drehbaren Platte 5 an dem linken Längsschlitten 2 erfolgt durch zwei hydraulische Verriegelungszylinder 7. Auf der drehbaren Platte 5 ist starr der Spindelstock 8 mit darin montierter Spindel 9 befestigt, an deren vorderen Ende ein Spannfutter 10 mit manueller, hydraulischer oder anderer Betätigungsart für das Befestigen des bearbeiteten Werkstücks 11 befestigt ist. An dem Spindelstock 8 ist im Niveau der Achse des bearbeiteten Werkstücks 11 eine konsolartige Abrichteinrichtung 12 für das Abrichten des Umfangs und der Stirnfläche der Außenschleifscheibe 13 montiert. Auf den Querführungen, die auf dem rechten Längsschlitten3 ausgebildet sind, ist ein Querschlitten 14 mit der Möglicheit einer Querbewegung mit Hilfe einer Vorrichtung zum Quervorschub der Innenschleifscheibe 15 montiert. An der oberen Oberfläche des Querschlittens 14 ist eine Spindeleinheit 16 zum Innenschleifen montiert, die eine Spindel 17 zum Innenschleifen trägt. Die Anordnung der Spindel 17 zum Innenschleifen kann entweder parallel zur Achse des bearbeiteten Werkstücks 11 (Fig. 3) oder unter einem Winkel α dazu (Fig. 4) erfolgen. An der seitlichen Oberfläche des rechten Längsschlittens 3 ist das Gehäuse eines linearen Meßsystems 18 befestigt, das für das fotoelektrische Messen der Verschiebung des Querschlittens 14 vorgesehen ist, an dem starr ein Gleitstück 19 montiert ist. An der oberen Oberfläche des Querschlittens 14 ist ein hydraulischer Zylinder 20 starr befestigt, mit dessen Hilfe das Zuführen und Abführen einer Verkleidung 21 der Innenschleifscheibe 22 erfolgt. Auf den Längsführungen des Körpers 1 ist starr ein Schutzschild 23 montiert, der durch von den beiden Teilen des linken Längsschlittens 2 und des rechten Längsschlittens 3 gebildete Hohlräume geht. Auf der oberen Fläche des Schutzschilds 23 sind starr Einrichtungen für die aktive Kontrolle beim Innenschleifen 24 und Außenschleifen 25 montiert, sowie auch eine drehbare Abrichteinrichtung 26 für das Abrichten der Stirnfläche und des Umfangs der Innenschleifscheibe 22. An dem hinteren Teil des Körpers ist eine Stütze 27 starr befestigt, an deren oberen Teil, senkrecht oder unter einem Winkel von 60° in bezug auf die Achse des bearbeiteten Werkstücks 11, die Querführungen 28 befestigt sind, auf denen der Support zum Außenschleifen 29 montiert ist mit der Möglichkeit des Quervorschubs mit Hilfe einer Vorrichtung 30 zum Quervorschub der Außenschleifscheibe. Im vorderen Teil des Supports 29 zum Außenschleifen sind eine Spindeleinheit 31 zum Außenschleifen und eine Einrichtung 32 zur axialen Orientierung des bearbeiteten Werkstücks 11 montiert. Die Spindeleinheit 31 zum Außenschleifen kann am Support 29 zum Außenschleifen in zwei Positionen montiert werden: senkrecht oder unter einem Winkel von 15 bis 20° in bezug auf die Querführungen 28. Die Anordnung der Spindeleinheit 31 zum Außenschleifen unter einem Winkel von 15 bis 20° wird bei senkrechter Anordnung der Querführungen 28 in bezug auf die Achse 11 des bearbeiteten Werkstücks ausgeführt, um das gleichzeitige periphere Schleifen seiner zylindrischen Flächen und Stirnflächen zu gewährleisten. Am linken Teil des Körpers 1 sind ein NC-Steuersystem 33 und ein Elektroschrank 24 starr befestigt. Die gerade Position der drehbaren Platte 5 für das Schleifen von zylindrischen Oberflächen wird durch den hinteren regulierbaren Anschlag 35 fixiert. und die gedrehte Position für das Schleifen von kegeligen Oberflächen durch den vorderen regulierbaren Anschlag 36.A left longitudinal slide 2 and a right longitudinal slide 3 are mounted on the longitudinal guides of the body 1 (FIGS. 1 and 2). These can be set in motion along the body 1 with the aid of two mechanisms of the same construction for longitudinal feed - left 4a and right 4b. On the left longitudinal slide 2 a rotatable plate 5 is mounted with the possibility of angular rotation for grinding conical (outer and inner) surfaces with the help of a hydraulic drive cylinder 6. The rigid attachment and detachment of the rotatable plate 5 to the left longitudinal slide 2 is carried out by two hydraulic locking cylinders 7. On the rotatable plate 5, the headstock 8 with the spindle 9 mounted therein is rigidly attached, at the front end of which a chuck 10 is fixed with manual, hydraulic or other type of actuation for fastening the machined workpiece 11. A console-type dressing device 12 for dressing the circumference and the end face of the outer grinding wheel 13 is mounted on the headstock 8 in the level of the axis of the machined workpiece 11. On the transverse guides, which are formed on the right longitudinal slide 3, a transverse slide 14 with the possibility of a transverse movement is mounted with the aid of a device for transverse advancement of the inner grinding wheel 15. On the upper surface of the cross slide 14, a spindle unit 16 for internal grinding is mounted, which carries a spindle 17 for internal grinding. The arrangement of the spindle 17 to the inner loop may be either parallel to the axis of the machined workpiece 11 (Fig. 3) or at an angle to α (FIG. 4) take place. On the side surface of the right longitudinal slide 3, the housing of a linear measuring system 18 is attached, which is provided for the photoelectric measurement of the displacement of the cross slide 14, on which a slider 19 is rigidly mounted. A hydraulic cylinder 20 is rigidly attached to the upper surface of the cross slide 14, with the aid of which a lining 21 of the inner grinding wheel 22 is fed and removed. A protective shield 23 is rigidly mounted on the longitudinal guides of the body 1 and passes through cavities formed by the two parts of the left longitudinal slide 2 and the right longitudinal slide 3. On the upper surface of the protective shield 23, devices for active control during internal grinding 24 and external grinding 25 are rigidly mounted, as well as a rotatable dressing device 26 for dressing the end face and the Circumference of the inner grinding wheel 22. On the rear part of the body, a support 27 is rigidly attached, on the upper part, perpendicular or at an angle of 60 ° with respect to the axis of the machined workpiece 11, the transverse guides 28 on which the Support for external grinding 29 is mounted with the possibility of cross feed using a device 30 for cross feed of the external grinding wheel. A spindle unit 31 for external grinding and a device 32 for axial orientation of the machined workpiece 11 are mounted in the front part of the support 29 for external grinding. The spindle unit 31 for external grinding can be mounted on the support 29 for external grinding in two positions: vertically or at an angle of 15 to 20 ° with respect to the transverse guides 28. The arrangement of the spindle unit 31 for external grinding at an angle of 15 to 20 ° becomes with the transverse guides 28 arranged vertically with respect to the axis 11 of the machined workpiece, in order to ensure the simultaneous peripheral grinding of its cylindrical surfaces and end faces. An NC control system 33 and an electrical cabinet 24 are rigidly attached to the left part of the body 1. The straight position of the rotatable plate 5 for grinding cylindrical surfaces is fixed by the rear adjustable stop 35. and the rotated position for grinding tapered surfaces through the front adjustable stop 36.

Die Wirkungsweise der Maschine ist wie folgt:

  • Am Anfang des Zyklus erfolgt automatisch eine axiale Orientierung des bearbeiteten Werkstücks 11, wobei die Einrichtung 32 zur axialen Orientierung in Arbeitsstellung auf das Niveau der Achse des bearbeiteten Werkstücks 11 kommt. Der Support 29 zum Außenschleifen wird entlang der Achse X1 zum bearbeiteten Werkstück 11 verschoben, bis der Fühler der Einrichtung 32 zur axialen Orientierung das programmierte Maß A der entsprechenden Stirnfläche erreicht (Fig. 5). Der linke Längsschlitten 2, der bis zu diesem Augenblick in linker Endposition zwecks Befestigung des neuen zu bearbeitenden Werkstücks 11 war, wird entlang der Achse Z1 nach rechts verschoben bis zur Erhaltung eines Berührungssignals von der Einrichtung 32 zur axialen Orientierung. Das Schleifen der äußeren zylindrischen Flächen und Stirnflächen des bearbeiteten Werkstücks 11 (Fig. 6) erfolgt durch die Außenschleifscheibe 13 durch Querbewegung des Supports 29 zum Außenschleifen entlang der Achse X1 und die Bewegung des linken Längsschlittens 2 entlang der Achse Z1. Während des Außenschleifens befindet sich die Innenschleifscheibe 22 in rechter Endposition. Das Schleifen der inneren zylindrischen Flächen und Stirnflächen des bearbeiteten Werkstücks 11 (Fig. 7) kann nach zwei Arten erfolgen: im ersten Fall dient die Bewegung entlang der Achse Z2 des rechten Längsschlittens 3 nur zum Zuführen der Innenschleifscheibe 22 in Arbeitsposition, zum Abrichten und zur Oszillation beim Einschneid-Innenschleifen. Das Innenschleifen erfolgt durch die Innenschleifscheibe 22 durch Bewegung des Querschlittens 14 entlang der Achse X2 und Bewegung des linken Längsschlittens 2 entlang der Achse Z1; im zweiten Fall erfolgt das Schleifen durch Längsbewegung des rechten Längsschlittens 3 und Bewegung des Querschlittens 14, nachdem vorher der linke Längsschlitten 2 das bearbeitete Werkstück 11 in Arbeitsposition gebracht hat. In beiden Fällen ist die Außenschleifscheibe 13 in hinterer Endposition.
The machine works as follows:
  • At the beginning of the cycle, the machined workpiece 11 is automatically oriented axially, the device 32 for axially orienting in the working position coming to the level of the axis of the machined workpiece 11. Support 29 for external grinding is moved along the axis X1 to the machined workpiece 11 until the sensor of the device 32 for axial orientation reaches the programmed dimension A of the corresponding end face (FIG. 5). The left longitudinal slide 2, which until now was in the left end position for fastening the new workpiece 11 to be machined, is shifted to the right along the axis Z1 until a touch signal is received from the device 32 for axial orientation. The grinding of the outer cylindrical surfaces and end surfaces of the machined workpiece 11 (FIG. 6) is carried out by the external grinding wheel 13 by transverse movement of the support 29 for external grinding along the axis X1 and the movement of the left longitudinal slide 2 along the axis Z1. During the external grinding, the internal grinding wheel 22 is in the right end position. The grinding of the inner cylindrical surfaces and end surfaces of the machined workpiece 11 (FIG. 7) can be carried out in two ways: in the first case, the movement along the axis Z2 of the right-hand longitudinal slide 3 only serves to feed the inner grinding wheel 22 into the working position, for dressing and for Oscillation during internal grinding. The inner grinding is carried out by the inner grinding wheel 22 by moving the cross slide 14 along the axis X2 and moving the left longitudinal slide 2 along the axis Z1; in the second case, the grinding is carried out by longitudinal movement of the right longitudinal slide 3 and movement of the cross slide 14 after the left longitudinal slide 2 has previously brought the machined workpiece 11 into the working position. In both cases, the outer grinding wheel 13 is in the rear end position.

Das Schleifen der inneren und äußeren kegeligen Oberflächen des bearbeiteten Werkstücks 11 erfolgt automatisch im Rahmen des Arbeitszyklus nach vorherigem Drehen der drehbaren Platte 5 im entsprechenden Winkel bis zum vorderen regulierbaren Anschlag 36 (Fig. 8 und 9).The grinding of the inner and outer conical surfaces of the machined workpiece 11 takes place automatically in the course of the working cycle after the rotatable plate 5 has been previously rotated at the appropriate angle up to the front adjustable stop 36 (FIG. 8 and 9).

Das Abrichten der Stirnfläche und des Umfangs der Außenschleifscheibe 13 erfolgt durch die konsolartige Abrichteinrichtung 12 bei Bewegungen entlang der steuerbaren Achsen X1 und Z1 (Fig. 10).The end face and the circumference of the outer grinding wheel 13 are dressed by the console-like dressing device 12 during movements along the controllable axes X1 and Z1 (FIG. 10).

Das Abrichten der Stirnfläche und des Umfangs der Innenschleifscheibe 22 erfolgt durch die drehbare Abrichteinrichtung 26, nachdem sie von der hydraulischen Vorrichtung 37 in Arbeitsposition gedreht wurde, bei Bewegungen entlang den steuerbaren Achsen X2 und Z2.The end face and the circumference of the inner grinding wheel 22 are dressed by the rotatable dressing device 26, after it has been rotated into the working position by the hydraulic device 37, during movements along the controllable axes X2 and Z2.

Claims (2)

1. Rundschleifmaschine zum Außen- und Innenschleifen mit NC-Steuerung, die einen Körper mit Längsführungen mit einem Schutzschild und einer Stütze, die starr am Körper befestigt ist; einen Spindelstock mit einem ersten Längsschlitten, der über die Längsführungen des Körpers von einer ersten Vorrichtung zum Längsvorschub geführt wird, und einer drehbaren Platte mit Spindel und Spannfutter; einen Support zum Außenschleifen mit Spindeleinheit zum Außenschleifen und einen Querschlitten aufweist, der beweglich auf einem zweiten Längsschlitten montiert ist und eine Spindeleinheit zum Innenschleifen trägt, dadurch gekennzeichnet, daß zwischen dem ersten Längsschlitten (2) und dem Spindelstock (8) eine drehbare Platte (5) montiert ist, und daß der Querschlitten (14), der die Spindeleinheit zum Innenschleifen (16) trägt, auf dem zweiten Längsschlitten (3) montiert ist, der durch eine zweite Vorrichtung zum Längsvorschub (4b) über die Längsführungen des Körpers (1) geführt wird, wobei an dem Schutzschild (23), dem ersten Längsschlitten (2) und dem zweiten Längsschlitten (3) entsprechend Einrichtungen zur aktiven Kontrolle beim Innenschleifen (24) umd beim Außenschleifen (25), sowie eine drehbare Abrichteinrichtung (26) montiert sind, und an dem Support zum Außenschleifen (29) eine Einrichtung zur axialen Orientierung (32) des bearbeiteten Werkstücks (11) montiert ist, und am Spindelstock (8) auf der Höhe der Achse des bearbeiteten Werkstücks (11) eine konsolartige Abrichteinrichtung (12) angebracht ist.1. Cylindrical grinding machine for external and internal grinding with NC control, which has a body with longitudinal guides with a protective shield and a support, which is rigidly attached to the body; a headstock with a first longitudinal slide, which is guided over the longitudinal guides of the body by a first device for longitudinal feed, and a rotatable plate with spindle and chuck; has a support for external grinding with a spindle unit for external grinding and a cross slide which is movably mounted on a second longitudinal slide and carries a spindle unit for internal grinding, characterized in that between the first longitudinal slide (2) and the headstock (8) there is a rotatable plate (5 ) and that the cross slide (14), which carries the spindle unit for internal grinding (16), is mounted on the second longitudinal slide (3), which is guided by a second device for longitudinal feed (4b) over the longitudinal guides of the body (1) guided, whereby devices for active control during internal grinding (24) and external grinding (25), as well as a rotatable dressing device (26) are mounted on the protective shield (23), the first longitudinal slide (2) and the second longitudinal slide (3) , and on the support for external grinding (29) a device for axial orientation (32) of the machined workpiece (11) is mounted, and on the spin delstock (8) at the level of the axis of the machined workpiece (11) a console-like dressing device (12) is attached. 2. Rundschleifmaschine nach Anspruch. 1, dadurch gekennzeichnet, daß an der drehbaren Platte (5) ein hydraulischer Antriebszylinder (6) und zwei hydraulische Verriegelungszylinder (7) montiert sind.2. cylindrical grinding machine according to claim. 1, characterized in that a hydraulic drive cylinder (6) and two hydraulic locking cylinders (7) are mounted on the rotatable plate (5).
EP19840103729 1983-04-05 1984-04-04 Cylindrical grinding machine for external and internal grinding with a numerical control device Expired EP0123956B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG6045283A BG37414A1 (en) 1983-04-05 1983-04-05 Round- grinding machine for external and internal grinding with digital programme control
BG60452/83 1983-04-05

Publications (3)

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EP0123956A2 true EP0123956A2 (en) 1984-11-07
EP0123956A3 EP0123956A3 (en) 1986-09-10
EP0123956B1 EP0123956B1 (en) 1988-08-10

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EP19840103729 Expired EP0123956B1 (en) 1983-04-05 1984-04-04 Cylindrical grinding machine for external and internal grinding with a numerical control device

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EP (1) EP0123956B1 (en)
BG (1) BG37414A1 (en)
CS (1) CS256921B1 (en)
DD (1) DD247573A7 (en)
DE (1) DE3473241D1 (en)
HU (1) HU192402B (en)
SU (1) SU1416294A1 (en)

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FR2561561A1 (en) * 1984-03-22 1985-09-27 Toyoda Machine Works Ltd DIGITAL-CONTROLLED GRINDING MACHINE FOR GRINDING A CONICAL PART OF A WORKPIECE
EP0257194A2 (en) * 1986-08-26 1988-03-02 Buderus Schleiftechnik GmbH Grinding machine for automatically grinding internal or external cylindrical surfaces, plane surfaces and/or internal and external threads
GB2206826A (en) * 1987-05-20 1989-01-18 Ts Nii Metalorezh Mash Grinding machine
EP0640435A1 (en) * 1993-08-24 1995-03-01 Rollomatic S.A. Grinding machine
CH685544A5 (en) * 1991-12-02 1995-08-15 Agathon Ag Maschf A method of circumferential and Chamfer grinding of cutting plates and apparatus for carrying out the method.
CN102085624A (en) * 2010-11-30 2011-06-08 无锡机床股份有限公司 Internal and external compound grinding machine
US20150239081A1 (en) * 2012-10-24 2015-08-27 Amada Machine Tools Company, Ltd. Combined working machine and combined working method
CN110253368A (en) * 2019-06-14 2019-09-20 长安大学 It is same inside and outside a kind of self-propelled steel pipe seam of electromagnet absorption to repair equipment
CN112894500A (en) * 2021-01-14 2021-06-04 邓耀华 Processing system before municipal administration sewage pipes erection joint
DE102012202548B4 (en) 2012-02-20 2022-08-04 Gehring Naumburg GmbH & Co. Internal and external honing machine
DE102021126942A1 (en) 2021-10-18 2022-09-15 Schaeffler Technologies AG & Co. KG Grinding machine and method for internal cylindrical grinding

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DE3733308A1 (en) * 1987-10-02 1989-04-13 Buderus Kundenguss GRINDING BODY
WO1990014925A1 (en) * 1989-05-29 1990-12-13 Moskovskoe Spetsialnoe Konstruktorskoe Bjuro Avtomaticheskikh Liny I Spetsialnykh Stankov Circular grinding machine for external and internal grinding
DE102007009843B4 (en) * 2007-02-28 2010-04-08 Erwin Junker Maschinenfabrik Gmbh Method for grinding a machine component and grinding machine for carrying out the method
JP2009125853A (en) 2007-11-22 2009-06-11 Murata Mach Ltd Sensor
CN103481137B (en) * 2013-09-16 2016-04-27 江苏阳明船舶装备制造技术有限公司 Pipe polisher
DE102014203402B3 (en) * 2014-02-25 2015-07-09 Erwin Junker Maschinenfabrik Gmbh GRINDING MACHINE AND METHOD FOR GRINDING AXIAL HOLES AND BOTH WORKPIECES APPLICABLE TO WORK ON THE SURFACE
UA124899C2 (en) * 2019-10-11 2021-12-08 Олексій Борисович Черенов CENTER-FREE CIRCULAR GRINDING MACHINE

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DE704586C (en) * 1936-03-11 1941-04-02 Heald Maschine Company Grinding machine, in particular internal grinding machine, with automatic electrical control through the grinding wheel
US2442683A (en) * 1945-03-15 1948-06-01 Bryant Grinder Corp Grinding machine
GB1107214A (en) * 1964-04-06 1968-03-27 Ulvsunda Verkst Er Aktiebolag Improvements in and relating to grinding machines
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Publication number Priority date Publication date Assignee Title
FR2561561A1 (en) * 1984-03-22 1985-09-27 Toyoda Machine Works Ltd DIGITAL-CONTROLLED GRINDING MACHINE FOR GRINDING A CONICAL PART OF A WORKPIECE
EP0257194A2 (en) * 1986-08-26 1988-03-02 Buderus Schleiftechnik GmbH Grinding machine for automatically grinding internal or external cylindrical surfaces, plane surfaces and/or internal and external threads
DE3628977A1 (en) * 1986-08-26 1988-03-03 Buderus Kundenguss GRINDING MACHINE FOR AUTOMATIC INNER ROUND, PLAN, EXTERNAL ROUND AND / OR INNER AND EXTERNAL THREAD GRINDING
EP0257194A3 (en) * 1986-08-26 1990-05-02 Buderus Schleiftechnik GmbH Grinding machine for automatically grinding internal or external cylindrical surfaces, plane surfaces and/or internal and external threads
GB2206826A (en) * 1987-05-20 1989-01-18 Ts Nii Metalorezh Mash Grinding machine
CH685544A5 (en) * 1991-12-02 1995-08-15 Agathon Ag Maschf A method of circumferential and Chamfer grinding of cutting plates and apparatus for carrying out the method.
EP0640435A1 (en) * 1993-08-24 1995-03-01 Rollomatic S.A. Grinding machine
CH689350A5 (en) * 1993-08-24 1999-03-15 Rollomatic Sa Grinding machine.
CN102085624A (en) * 2010-11-30 2011-06-08 无锡机床股份有限公司 Internal and external compound grinding machine
DE102012202548B4 (en) 2012-02-20 2022-08-04 Gehring Naumburg GmbH & Co. Internal and external honing machine
US20150239081A1 (en) * 2012-10-24 2015-08-27 Amada Machine Tools Company, Ltd. Combined working machine and combined working method
US9895780B2 (en) * 2012-10-24 2018-02-20 Dmg Mori Co., Ltd. Combined working machine and combined working method
CN110253368A (en) * 2019-06-14 2019-09-20 长安大学 It is same inside and outside a kind of self-propelled steel pipe seam of electromagnet absorption to repair equipment
CN110253368B (en) * 2019-06-14 2024-02-13 长安大学 Electromagnet adsorption self-propelled steel pipe welding seam internal and external repair equipment
CN112894500A (en) * 2021-01-14 2021-06-04 邓耀华 Processing system before municipal administration sewage pipes erection joint
DE102021126942A1 (en) 2021-10-18 2022-09-15 Schaeffler Technologies AG & Co. KG Grinding machine and method for internal cylindrical grinding

Also Published As

Publication number Publication date
EP0123956A3 (en) 1986-09-10
HU192402B (en) 1987-06-29
CS256921B1 (en) 1988-04-15
CS224384A1 (en) 1986-12-18
EP0123956B1 (en) 1988-08-10
SU1416294A1 (en) 1988-08-15
DD247573A7 (en) 1987-07-15
HUT34134A (en) 1985-02-28
DE3473241D1 (en) 1988-09-15
BG37414A1 (en) 1985-06-14

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