Honing tool

Abstract

The present invention relates to a honing tool and a method for honing the inner surface of an opening in a workpiece with a honing tool according to the invention.

1 . A honing tool for honing an inner surface of an opening in a workpiece, comprising a tool body extending in an axial direction (A) and having a honing section which comprises a group of hone strips, characterised in that the honing tool comprises a workpiece checking element for checking a size and/or a position of the opening, the workpiece checking element being arranged on the tool body so as to be movable relative to the tool body, preferably in the axial direction (A), in order to check during the insertion of the honing tool into the opening whether the opening in the workpiece has a sufficient opening width and/or to check for a positioning or alignment error of the opening of the workpiece, wherein the workpiece checking element is biased into an initial position (AS) and is arranged on the tool body such that the workpiece checking element is moved out of the initial position (AS) when the workpiece checking element comes into contact with the workpiece, wherein the workpiece checking element is coupled to a detection device which is adapted to detect a movement of the workpiece checking element relative to the tool body, wherein the detecting device is coupled to a controller such that the controller interrupts the insertion of the honing tool into the opening if the detecting device detects a movement of the workpiece checking element relative to the tool body. 
     
     
         2 . The honing tool according to  claim 1 , characterized in that the workpiece checking element is arranged resiliently supported on the tool body. 
     
     
         3 . (canceled) 
     
     
         4 . The honing tool according to  claim 1 , characterised in that the workpiece checking element comprises a contact portion for contacting the workpiece which expands in a radial direction (R) when viewed from a workpiece-side end of the tool body along the axial direction (A). 
     
     
         5 . The honing tool according to  claim 1 , characterized in that the workpiece checking element is ring-shaped, and preferably extends around the tool body. 
     
     
         6 . The honing tool according to  claim 1 , characterized in that the workpiece checking element is arranged in the axial direction (A) between the workpiece-side end of the tool body and the honing section, or in that the workpiece checking element forms a workpiece-side end of the tool body. 
     
     
         7 . The honing tool according to  claim 1 , characterized by a second honing section comprising a second group of hone strips, wherein the first honing section is arranged on the tool body spaced apart from the second honing section in the axial direction (A). 
     
     
         8 . The honing tool according to  claim 1 , characterized in that the workpiece checking element is coupled to a pneumatic or hydraulic actuator such that the pneumatic or hydraulic actuator changes a flow cross-section of a pneumatic or hydraulic checking medium channel when the workpiece checking element is moved out of the initial position (AS). 
     
     
         9 . The honing tool according to  claim 1 , characterized by at least one air measuring nozzle which, when viewed in the axial direction (A), is arranged offset with respect to the hone strips, in particular, when viewed from a workpiece-side end of the tool body, behind the hone strips of one of the honing sections, preferably of all of the honing sections, and/or by at least one air measuring nozzle which, when viewed in the axial direction (A), is located adjacent to the hone strips of the honing section or of one of the honing sections, preferably wherein the honing tool comprises at least one air measuring nozzle per honing section which is arranged adjacent to the hone strips of the respective honing section when viewed in the axial direction (A). 
     
     
         10 . The honing tool according to  claim 8 , characterised in that the actuator which is coupled the workpiece checking element is a pneumatic actuator and the checking medium channel whose flow cross-section is changed by the actuator, is pneumatically connected to a measuring air channel via which at least one air measuring nozzle can be supplied with measuring air. 
     
     
         11 . The honing tool according to  claim 1 , characterized by an infeed device by which the respective hone strips of the two honing sections are feedable in the radial direction (R) independently of each other or always simultaneously. 
     
     
         12 . The honing tool according to  claim 11 , characterized in that the infeed device has one infeed cone per honing section, which is designed to interact with wedge surfaces of the hone strips, in order to convert an axial movement of an infeed element into a radial infeed of the hone strips, preferably wherein the infeed cones of a plurality of honing sections are arranged on a single infeed element such that both infeed cones are moved upon movement of the infeed element. 
     
     
         13 . The honing tool according to  claim 1 , characterized in that the honing tool comprises a brush section. 
     
     
         14 . The honing tool according to  claim 1 , characterized in that a tool guide is arranged on the honing tool in the region of the workpiece-side end of the tool body. 
     
     
         15 . A method of honing an inner surface of an opening in a workpiece with a honing tool for honing an inner surface of an opening in a workpiece, comprising a tool body extending in an axial direction (A) and having a honing section which comprises a group of hone strips, characterised in that the honing tool comprises a workpiece checking element for checking a size and/or a position of the opening, the workpiece checking element being arranged on the tool body so as to be movable relative to the tool body, preferably in the axial direction (A), in order to check during the insertion of the honing tool into the opening whether the opening in the workpiece has a sufficient opening width and/or to check for a positioning or alignment error of the opening of the workpiece, wherein the workpiece checking element is biased into an initial position (AS) and is arranged on the tool body such that the workpiece checking element is moved out of the initial position (AS) when the workpiece checking element comes into contact with the workpiece, wherein the workpiece checking element is coupled to a detection device which is adapted to detect a movement of the workpiece checking element relative to the tool body, wherein the detecting device is coupled to a controller such that the controller interrupts the insertion of the honing tool into the opening if the detecting device detects a movement of the workpiece checking element relative to the tool body, wherein the method comprises the following steps in succession:
 a) axially inserting the honing tool into the opening and pre-checking, in particular of an opening width, of the opening in the workpiece by means of the workpiece checking element;   b) honing the opening by the hone strips of the honing section, preferably measuring the opening width via an air measuring nozzle;   preferably c) axially moving the honing tool, in particular further axially inserting the honing tool into the opening, and re-measuring the opening width via an air measuring nozzle which is spaced apart from the honing section of step b) in the axial direction (A);   preferably d) axially moving the honing tool in particular further axially inserting the honing tool into the opening, and subsequently honing the opening by the hone strips of the second honing section, preferably measuring the opening width via an air measuring nozzle which is arranged adjacent to the hone strips of the second honing section when viewed in the axial direction (A);   preferably e) re-measuring the opening width via an air-measuring nozzle which is arranged adjacent to the hone strips of the second honing section of step d) when viewed in the axial direction (A), or axially moving the honing tool in particular further axially inserting the honing tool into the opening, and re-measuring the opening width via an air-measuring nozzle which is spaced apart from the second honing section of step d) in the axial direction (A);   preferably f) axially moving the honing tool, in particular further axially inserting the honing tool into the opening, and subsequently brushing of the opening by the brush section of the honing tool;   g) axially retracting the honing tool from the opening.