DD291500A5 - Profile grinding machine, especially for machining straight and drilling gears - Google Patents

Profile grinding machine, especially for machining straight and drilling gears Download PDF

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Publication number
DD291500A5
DD291500A5 DD33718790A DD33718790A DD291500A5 DD 291500 A5 DD291500 A5 DD 291500A5 DD 33718790 A DD33718790 A DD 33718790A DD 33718790 A DD33718790 A DD 33718790A DD 291500 A5 DD291500 A5 DD 291500A5
Authority
DD
German Democratic Republic
Prior art keywords
grinding
profile
workpiece
grinding machine
axis
Prior art date
Application number
DD33718790A
Other languages
German (de)
Inventor
Hans-Joachim Ulrich
Sieghart Lenz
Original Assignee
Veb Wmk "7. Oktober" Berlin,De
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 Veb Wmk "7. Oktober" Berlin,De filed Critical Veb Wmk "7. Oktober" Berlin,De
Priority to DD33718790A priority Critical patent/DD291500A5/en
Publication of DD291500A5 publication Critical patent/DD291500A5/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23FMAKING GEARS OR TOOTHED RACKS
    • B23F23/00Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
    • B23F23/12Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
    • B23F23/1225Arrangements of abrasive wheel dressing devices on gear-cutting machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23FMAKING GEARS OR TOOTHED RACKS
    • B23F1/00Making gear teeth by tools of which the profile matches the profile of the required surface
    • B23F1/02Making gear teeth by tools of which the profile matches the profile of the required surface by grinding
    • B23F1/026Making gear teeth by tools of which the profile matches the profile of the required surface by grinding with plural tools

Abstract

The invention relates to a profile grinding machine, in particular for the machining of straight and Schraegzahnraedern, with two profiled Abrasive bodies. The profile grinding machine according to the invention consists of a pivot support 4, on which sliding grinding supports 2, each having a grinding body 1, are displaceable at right angles and symmetrically to the pivot axis of the pivot support 4. Both wheels 1 have the profile for generating a workpiece tooth flank. The Schleifkoerperebenen are inclined by a fixed angle a to the displacement axis of the grinding supports 2 and each abrasive body 1 is associated with a tooth flank one and the same tooth of a workpiece 3. The profile grinding machine is simple in construction. It has a high static and dynamic stiffness and allows an improvement of the processing in terms of quality and productivity. Fig. 3 {profile grinding machine; Gear; Schleifkoerper; Swivel support; Grinding support; Displacement axis; Tooth flank; Profile; Workpiece; Schleifkoerperebene; Corner; Tilt; trueing}

Description

For this 5 pages drawings
Field of application of the invention
The invention relates to a profile grinding machine, in particular for the machining of straight-oblique helical gears, with two profiled grinding wheels.
Characteristic of the known state of the art
The DD-WP 4843 shows a profile grinding machine for straight and helical gears with two or more grinding spindles with one-sided profiled grinding wheel. The solution provides that at the same time, under the action of Axialvorschubes, two or more tooth flanks are machined.
Each wheelhead carries a grinding spindle with one side profiled grinding wheel and has a guide along the grinding spindle axis and another transverse to it. B.'i fixed headstock, the abrasive body is thus displaceable in two orthogonal directions.
For each wheel head a sheet segment is assigned, with the aid of the grinding body is adjustable to the helix angle of the workpiece, and further, each sheet segment is disposed thereon with a grinding wheel holder pivotally mounted on a common sheet guide about the workpiece axis.
About the arrangement of the corresponding dressing tools are no information available.
For a symmetrical machine with two wheels, 10 machine axes are required:
- Workpiece translation
- Workpiece rotation
- grinding wheel 1 tangential shift
- Grinding wheel 1 Radial displacement
- Grinding wheel 1 Claw angle adjustment
- Grinding wheel 1 Setting concentric to the workpiece axis
- Grinding wheel 2 Tantential shift
- grinding wheel 2 radial displacement
- grinding wheel 2 helix angle adjustment
- Grinding wheel 2 Setting concentric to the workpiece axis
This is a considerable machine cost. Furthermore, correspondingly many errors occur on the axes. Not least, the solution described leads to a labile machine structure with many joining and tilting points.
DD-WP 262177 shows the arrangement of two single-sided profiled grinding wheels whose axes are arranged in the same axial direction. The delivery of each abrasive article is carried out in two components in order to achieve the most uniform possible delivery along the profile and a more uniform abrasive wear.
Each grinding wheel works on another tooth.
The proposed solution does not eipnet for machining helical workpieces.
The aim of the invention is to provide a profile grinding machine, in particular for the processing of straight and helical gears, with two profiled grinding wheels, which requires little mechanical effort and allows a universal machining with high quality and productivity.
Explanation of the essence of the invention
The invention has for its object to provide a profile grinding machine of the type mentioned, the machine configuration is designed so that only one tool pivot axis and only a Werkzeugzustellachse is required for both grinding wheels and can be realized by the arrangement of both wheels of the increased peripheral grinding simultaneously.
According to the invention this is achieved in that on a pivot support two perpendicular and symmetrical to the pivot axis of the pivot support slidable grinding with one abrasive body, which has the profile for generating a workpiece tooth flank are arranged, wherein the abrasive body planes are inclined by a fixed angle to the axis of displacement of the grinding and each abrasive body is associated with a tooth flank of one and the same tooth of a workpiece.
For special processing cases, it is advantageous if the grinding bodies have the shape of a truncated cone. Another advantageous embodiment of the invention is that the angle for the inclination of the abrasive body levels corresponds to the pressure angle of the reference rack.
A further advantageous embodiment of the invention is that a dressing carriage is arranged on the pivot support, which is displaceable in the direction of the pivot axis of the pivot support and on the opposite side of the workpiece at least two dressing tools, each of which one of the two grinding wheels is assigned.
A preferred embodiment of the invention provides that the dressing tools are designed to rotate. For this embodiment, it is expedient that the axes of rotation of the rotary dressing tools are arranged parallel to the grinding body axes of rotation.
Exemplary embodiments
The invention will be explained below with reference to exemplary embodiments. In the accompanying drawings show
2: the view from above (plan view) of a profile grinding machine with tool and workpiece stand FIG. 3: the top view (plan view) of a profile grinding machine with tool stand and integrated dressing device FIG : the scheme of a profile grinding machine with frusto-conical grinding wheels Fig.5: a pivot support with rotating dressing tools.
Each grinding wheel 1 is arranged inclined at the angle α for guiding the grinding support 2. Both grinding supports 2 are mounted symmetrically displaceable on the pivot support 4.
In Fig. 1, the pivot support 4 is associated with a cross bar 5, which is slidably in communication with the portal 6. The portal 6 is connected to the machine bed 8; both are based on the foundation, not shown. Slidably mounted on the machine bed 8 is the workpiece carriage 7 with the workpiece. 3
In Fig. 2, the pivot support 4 is connected to the tool stand 9 in connection. This is arranged longitudinally displaceable on the machine bed 8. On the machine bed 8, the workpiece stand 10 is arranged stationary. At this is slidable in guides, the workpiece carriage 7 with the workpiece. 3
In Figure 3, the pivot support 4 is connected to the tool carriage 12 in connection. This is, in guides displaced, arranged on the tool stand 9. The tool stand 9 is slidable on the machine bed 8. The workpiece 3 is rotatably mounted on the machine bed 8.
In the pivot support 4 is the dressing carriage 11 with preferably rotating dressing tools.
Fig. 4 shows a schematic machine construction, wherein the grinding wheels 1 are frusto-conical.
Fig. 5 shows a pivot support 4 with a dressing carriage 11, on which the axes of rotation of the rotary dressing tools are arranged parallel to the grinding wheel axes.
The mode of operation of the profile grinding machine according to the invention is as follows:
The rotating grinding wheels 1 are set by pivoting the pivot support 4 (tool pivot axis B) to the workpiece taper angle. With the help of Werkzeugverstellachsen U 1 and U 2 and the axis for the Rödialzustcllung Y, the grinding wheels 1 are each hired on an edge of a workpiece tooth. Since the sides of the grinding wheels 1 facing the work tooth have the profile for producing a tooth and their opposite sides represent planes of one and the same inclined rack, there can be no collision. It follows that for both grinding support 2 a pivot and a feed axis (B or Y) is sufficient.
In Fig. 1, the pivoted and positioned grinding body 1 remain stationary, wherein the pivot support 4 is clamped to crossbeams 5 and this is also on the portal 6 in position.
The workpiece 3 moves .lurch by turning about its axis (workpiece axis of rotation C) relative to the WerkstücKschlitten 7 and moving the workpiece carriage 7 relative to the machine bed 8 (axis for axial feed Z) screwing past the grinding wheels 1 over.
In Fig. 2, the radial feed via the tool stand 9 (Y-axis), which carries the clamped pivot support 4 takes place. The machine bed 8 carries the stationary workpiece stand 10, on which the workpiece carriage 7 ausfijnrt the axial feed movement (Z-axis) and on which the workpiece 3 rotates about its axis (C-axis). The workpiece 3 thus screws past the pivoted and positioned grinding wheels 1.
In Fig. 3, the workpiece only rotates about its C-axis. The Axialvorstf stroke movement is performed by the tool carriage 12, which moves relative to the tool stand 9. Here, the pivoted and positioned grinding wheels 1 move along the workpiece (Z-axis) while this simultaneously performs a rotational movement (C-axis).
In the pivot support 4, a dressing carriage 11 is arranged with preferably rotating dressing tools. The Abrichtwei tools (axis Y A ) and the grinding wheels 1 (axes U 1 and
In Figure 4, the grinding wheels 1 are frusto-conical in the same arrangement of dressing carriage 11 and grinding support 2. Here, the advantage is that after the dressing process by which the abrasive body profile rotates at a smaller radius, only a correction in the Y-axis is required, while not so designed disc-shaped grinding wheels 1, a correction by the Y-axis and the axes U 1 and U 2 must be done. To increase the stiffness, the abrasive bodies have been reinforced in width according to FIG. This requires a dressing of the workpiece profile and a free cutting of the back of the Gesamtschleifkörperprofiles. To make this possible in a simple manner, the axes of rotation of the dressing tool and grinding wheel 1 are arranged in parallel.
As a result, the overall profile in path control of the axes Ya, U t and U 2 can be generated.
By using the solution according to the invention results in a simpler machine structure compared to comparable solutions, due to the reduction of the number of necessary machine axes. The simpler machine design results in a more economical design of the machine with higher static and dynamic stiffness and thus an improvement in machining in terms of quality and productivity. The symmetrical arrangement of the grinding supports and the associated arrangement of the heat sources require a thermally advantageous construction of the profile grinding machine.
Furthermore, the proposed solution allows the simultaneous processing of two tooth flanks of a tooth with the same or unequal tooth width modification.
The tangential force components (circumferential direction of the workpiece 1) cancel each other, which leads to a low load on the workpiece clamping elements. The processing is increasingly carried out with the procedurally better peripheral grinding, resulting in particular in increasing the achievable accuracy and surface quality of the workpiece.

Claims (6)

1. Profile grinding machine, in particular for the machining of straight and helical gears, with two profiled grinding bodies, characterized in that on a pivot support (4) two perpendicular and symmetrical to the pivot axis of the pivot support (4) slidable grinding supports (2), each with an abrasive body (1 ), which has the profile for producing a workpiece tooth flank, are arranged , wherein the abrasive body planes are inclined by a fixed angle (α) to the displacement axis of the grinding specimens (2) and each grinding body (1) of a tooth flank of one and the same tooth of a workpiece (3) assigned.
2. Profile grinding machine according to claim 1, characterized in that the grinding bodies (1) have the shape of a truncated cone.
3. profile grinding machine according to claim 1, characterized in that the angle (α) for the inclination of the abrasive body levels corresponds to the pressure angle of the reference rack.
4. Profile grinding machine according to claim 1, characterized in that on the pivot support (4) a dressing carriage (11) is arranged, which in the direction of the pivot axis of the pivot support (4) is displaceable and on the workpiece (3) opposite side at least two Has dressing tools, of which each one of the two grinding wheels (1) is assigned.
5. Profile grinding machine according to claim 4, characterized in that the dressing tools are designed to rotate.
6. Profile grinding machine according to claim 5, characterized in that the axes of rotation of the rotary dressing tools are arranged parallel to the grinding body axes of rotation.
DD33718790A 1990-01-18 1990-01-18 Profile grinding machine, especially for machining straight and drilling gears DD291500A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DD33718790A DD291500A5 (en) 1990-01-18 1990-01-18 Profile grinding machine, especially for machining straight and drilling gears

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD33718790A DD291500A5 (en) 1990-01-18 1990-01-18 Profile grinding machine, especially for machining straight and drilling gears

Publications (1)

Publication Number Publication Date
DD291500A5 true DD291500A5 (en) 1991-07-04

Family

ID=5615984

Family Applications (1)

Application Number Title Priority Date Filing Date
DD33718790A DD291500A5 (en) 1990-01-18 1990-01-18 Profile grinding machine, especially for machining straight and drilling gears

Country Status (1)

Country Link
DD (1) DD291500A5 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993019881A1 (en) * 1992-03-27 1993-10-14 Niles Werkzeugmaschinen Gmbh Berlin Method and device for grinding grooved external surfaces of a workpiece
US20120258647A1 (en) * 2011-03-29 2012-10-11 Liebherr-Verzahntechnik Gmbh Gear cutting machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993019881A1 (en) * 1992-03-27 1993-10-14 Niles Werkzeugmaschinen Gmbh Berlin Method and device for grinding grooved external surfaces of a workpiece
DE4210710C2 (en) * 1992-03-27 2003-03-20 Niles Werkzeugmaschinen Gmbh Method and device for grinding groove-shaped outer profiles of a workpiece
US20120258647A1 (en) * 2011-03-29 2012-10-11 Liebherr-Verzahntechnik Gmbh Gear cutting machine
DE102011015447A1 (en) * 2011-03-29 2012-10-25 Liebherr-Verzahntechnik Gmbh gear cutting

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