DE19800515A1 - Machining of grinding center profile - Google Patents

Abstract

The spindles (4) of a cylindrical grinding machine have profiled centers (2) that are produced in a grinding operation. The profile is formed by a tooling fixture which supports and controls a grinding or honing tool (11). The tool is held in a tool holder (12) on a carriage (6) with a drive that can be set at an angle by adjusting a bar (13). The lower end is mounted on an adjustable carriage.

Description

Portable grinding machines for regrinding of fits on watertight lockable bulkheads from Ships can be found in the US patent specification: 2,528,511.

The US patent: 3,187,470 deals with one portable grinder, the grinding and lapping operations on the inner cone surfaces of tool holders Execute spindles from machining centers, whereby different machining operations from different Machining devices are performed.

In the German patent specification: 4,306,162 is only one Machining type, namely grinding. A linear guided grinding arm carries one by an air motor powered grindstone that is linear relative to the deformed Cone inner surface can move, this with the spindle rotates.

The advantages stated in this patent specification become Part also met the US patent specification, although the Devices have great differences.

The invention wants on the one hand with the help of the mobility of the Avoid device dead times at the machining center and on the other hand, design the device so that with a single Device multiple processing types can be carried out.

In addition, it is the object of the invention Reduce processing times to a minimum.

The aforementioned two tasks are performed by the Teaching according to claim 1 fulfilled. The spindles no longer have to dismantled and transported to special workshops.  

The extraordinarily long processing times for the Grinding off excess material is reduced by approximately half of the previous grinding time due to the faster Chip removal.

Subsequent further processing operations, such as Honing or lapping does not require the installation of a second one Contraption. Also the time for the fine adjustment of the Saved the angle of the linear guide for the tools.

The teaching of claim 1 is defined by claim 2 advantageously added. For machining, the Device practically except for a change of tool remain unchanged and there is no need to hire a new employee of the linear angle.

For lathes for machining usually the speed and the feed the respective Adapted to conditions. The speed of the spindles on Machining center should remain as constant as possible, though the cutting tool relative to the Cone inner surface covered distance depending on the linear Position changes. The claim 3 ensures optimization and thus acceleration of the "chip removal" operation.

The cutting resistance also changes with the nature the material and the condition of the cutting tools. The Use of claim 4 in this context Avoid absenteeism.

Claim 5 supplements the teaching according to Claim 4.

Device claim 6 and the following are concerned with constructive details that make it possible to use two or more different operations different working methods with only one device carry out unchanged angle adjustment.  

The tasks mentioned at the outset are from the Requirements met and the desired advantages were in the Practice confirmed as achieved.

The drawing serves to better understand both the Ver driving claims as well as the device for performing the Method.

The design can be carried out without the frame Leaving invention to be changed quite.

Fig. 1 shows a side view of a portable On device 6 with both a cutting, as well as a honing deformation of the inner cone surface 1 tool holder 2 of the spindles 4 of machining centers 3 is possible and a faster repair compared to the prior art.

A linear guide 7 is pivotally connected to the base plate 15 about an articulation axis 24 .

The base plate 15 can consist of a lower plate 21 and a dovetail guide 16 opposite this upper plate 27 . On the top plate 27 , a carriage 17 is linearly guided, at the joint 18 a support arm 19 is closed, the other free end engages with the hinge plate 23 on the linear guide 7 . By moving the carriage 17 , the angular position 20 of the linear guide 7 can be set very precisely. A dial gauge for the angle setting 20 can be connected to the hinge axis 24 .

The entire device 6 is firmly connected to the table 5 of the machining center 3 with its base plate 15 .

The bottom plate 21, which is firmly connected to the table 5 , has a support block 28 in its front face in which a threaded nut is enclosed. In the threaded nut engages a threaded rod 29 , a fine displacement of the top plate 27 takes place during its rotation. The angle setting 20 remains unchanged.

Only the infeed or chip thickness changes due to the parallel displacement of the linear guide 7 .

The linear guide 7 is connected to a taper nut 26 via a ball screw drive. The ball screw 25 is driven via a countershaft 22 from the controllable electric motor 14 . The computer-controlled regulation is not shown. The different circumferential paths of the machining tools 8 and 11 on the inner surfaces 1 of the cone and, alternatively, the cutting or honing resistance on the respective tool can be entered as parameters for the computer control.

FIG. 1 a shows a cutting tool cutting edge 9 which is suitably attached to the end of a shaft 12 . The shaft 12 is inserted and fastened in a guide within the linearly displaceable part 13 of the linear guide 7 .

FIG. 1b is like Fig. 1a is a partial section through the spindle 4 with their zeugaufrahme to be machined tapered inner surface 1 of the unit 2.

At the end of the shaft 12 , a honing stone 11 is attached. All processing methods for surface coating with linearly displaceable tool 8 , 9 , 11 and rotating spindle 4 can be carried out with the method and the devices according to the invention without readjusting the angle setting 20 .

Fig. 2 shows a conical inner surface 1 in partial section as a development in order to make the displacement of this surface in the direction of the smallest inner diameter ( 10 ) clear with the required material removal.

Reference list

1

Inner surface of the cone

2nd

Tool holders

3rd

Machining center

4th

spindle

5

Machining center table

6

Movable device

7

Linear guide

8th

Cutting tool

9

Cutting edge

10th

smallest inside diameter of the inner surface of the cone

11

Honstein

12th

interchangeable shafts

13

sliding part of the linear guide

7

14

adjustable electric motor

15

Base plates

21

u.

27

16

Dovetail guide

17th

linear slide

18th

joint

19th

Support arm

20th

Angle adjustment

21

Lower plate

22

Gear

23

Hinge strap

24th

Hinge axis

25th

Ball screw

26

Ball screw circulation nut

27

Top plate

28

Support block

29

Threaded rod

Claims (9)

1. Method for working up deformed inner cone surfaces ( 1 ) of the tool holders ( 2 ) on spindles ( 4 ) not separated from the machining center ( 3 ) with the aid of a device ( 6 ) connected to the table ( 5 ) of the machining center ( 3 ) having an angularly adjustable linear guide (7), characterized in that first with linearly guided cutting blade works Zugen (8) with the spindle (4) relatively in the circumferential direction relative to the cutting edge (9) of the cutting tool (8) moving conical inner surface (1) in Direction to the smallest inside diameter ( 10 ) is shifted by material removal and only then further processing operations for surface treatment with unchanged angle setting ( 20 ) take place. 2. The method according to claim 1, characterized in that the first further operation is a honing operation, the fine adjustment of the angle of the linear guide ( 7 ) for the machining operation remaining unchanged. 3. The method according to claim 1 and or 2, characterized in that the linear feed of the tools takes place via a computer-controlled control which uses the relative speed, which is dependent on the respective scope, between the machining point on the inner surface of the cone ( 1 ) and the machining tool as parameters (cutting edge 9 / Honstein 11 ). 4. The method according to one or more of claims 1-3, characterized in that the sensor Cutting resistance is measured and as a parameter for the Calculation of the optimal feed serves. 5. The method according to one or more of claims 1-4, characterized in that the rotational speed of the spindle being worked up ( 4 ) is kept constant. 6. Device according to one or more of the claims 1-5, characterized in that the linearly guided machining tools ( 8-11 ) are attached to interchangeable shafts ( 12 ), which in turn are rigid with a displaceable part ( 13 ) of the linear guide ( 7 ) are connected which is linearly displaceable via a ball screw drive with a controllable electric motor ( 14 ) and whose speed depends on the computer control. 7. The device according to one or more of the claims 1-6, characterized in that the base plate ( 15 ) of the device ( 6 ) via a dovetail guide ( 16 ) is rigidly but adjustable connected to the table of the machining center ( 5 ) and a linearge Carries slide ( 17 ), to which a support arm ( 19 ) is connected via a joint ( 18 ), which in turn is articulated to the linear guide ( 7 ) for the machining tools ( 8-11 ). 8. The device according to claim 7, characterized in that for the angular adjustment ( 20 ) of the linear guide ( 7 ) linear position of the slide ( 17 ) relative to the top plate ( 27 ) can be read via dial gauges. 9. The device according to one or more of the method claims 1-5 and the device claims 6-8, characterized in that the portable device ( 6 ) at least one cutting and honing device ( 8-11 ) via a common ball screw linear guide ( 7 ) and whose angle setting ( 20 ) via a common on the table ( 5 ) of the machining center ( 3 ) mountable base plate ( 15 ) is connected to a unit.