JPH09466U - Grinder - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To significantly improve inner surface grinding or screw grinding in terms of manufacturing accuracy and work cycle. A grinding machine for automatically performing inner surface grinding, surface grinding, cylindrical grinding, and / or screw grinding, which comprises an inner surface grinding wheel shaft 4 and a work spindle arranged on a grinding table 1. In the type in which the platform 2 is provided, and the inner grinding wheel shaft and the work spindle stock are relatively movable in the directions perpendicular to each other, the inner grinding wheel shaft 4 is a wheel wheel. In the vertical plane centered on the center point, it can automatically turn to the desired angular position via the program input to the grinder, and in the horizontal position for the purpose of dressing the grinding wheel, the machine headstock It is possible to pass by a forming roller arranged beside the two.

Description

[Detailed description of the device]

[0001]

[Technical field to which the invention belongs]

 The present invention is a grinding machine for automatically performing inner surface grinding, surface grinding, cylindrical grinding, screw (male screw / female screw) grinding, or any combination thereof, and a grinding wheel for inner surface grinding arranged on a grinding table. The present invention relates to a type in which a shaft and a work headstock are provided, and the inner surface grinding wheel shaft and the work headstock are relatively movable in directions perpendicular to each other.

[0002]

[Prior art]

 It is known to movably arrange a plurality of grinding units and a work spindle unit in a common undercarriage in order to clamp the workpiece and carry out different grinding processes. For example, European Patent Application Publication No. 0051136 discloses such a grinding machine, that is, a grinding machine for performing inner surface grinding, cylindrical grinding or surface grinding of a workpiece.

The demand for obtaining high dimensional accuracy while keeping the time required for one process as short as possible is increasing more and more in the automatic grinders.

[0004]

[Problems to be solved by the device]

 An object of the present invention is therefore to improve the internal grinding or thread grinding significantly with regard to manufacturing accuracy and working cycle.

[0005]

[Means for Solving the Problems]

 In order to solve this problem, in the structure of the present invention, in the grinding machine of the type described at the beginning, the grinding wheel for internal grinding is input to the grinding machine in the vertical plane centering on the center of the grinding wheel. It is possible to automatically swivel to a desired angular position via a programmed program and to pass by a forming roller located next to the machine headstock in a horizontal position for the purpose of dressing the grinding wheel. I did.

[0006]

[Effect of the invention]

 The grinding wheel for internal grinding, which can automatically turn in the vertical plane about the center of the grinding wheel, is controlled by the CNC controller based on the program specified for each workpiece, and It is possible to attach a wheel car belonging to each time. In the horizontal position, internal grinding takes place, and in this position the grinding wheel can be dressed on the forming rollers arranged next to the machine headstock. Therefore, it is not necessary to adjust the dressing device for screw grinding to the screw pitch angle as well.

[0007]

[Embodiment of the invention]

 Next, an embodiment of the present invention will be described with reference to the drawings.

On the grinding machine table 1, there are arranged a transverse carriage 3 which holds a work headstock 2 and a grinding table 5 which holds an internal grinding wheel spindle 4. Furthermore, a cylindrical grinding device 6 configured as a two-grinding unit is provided, the carriage 7 of the cylindrical grinding device is movable in the direction of arrow X ₂ , and the carriage 7 a is placed in the direction of arrow Z ₂ . Can be sent. Further, X ₁ indicates the feed direction of the lateral carriage 3, Z ₁ indicates the feed direction of the grinding wheel shaft 4 for inner surface grinding, and arrows A, C, S ₁ , S ₂ and S ₃ indicate for inner surface grinding. The rotational or swivel directions of the wheel spindle 4, the cylindrical grinding wheel spindle 8, the work spindle and the dressing roller 9 are shown respectively.

The work progress is as follows: (a) In the case of circular surface grinding, the inner surface grinding machine and the cylindrical grinding machine work simultaneously. This is because the X ₁ axis serves as the feed axis for the inner surface and the cylindrical grinding unit.

Since the accuracy requirements for internal grinding are often higher than for cylindrical grinding, the outer diameter can be ground to the final dimensions in a simultaneous grinding cycle consisting of rough grinding and finish grinding, and then The cylindrical grinding unit is pulled back to the waiting position.

The grinding wheel for internal grinding is intermediately dressed by a dressing roller 9, and in this case, the work headstock 2 to which the dressing roller 9 is fixed and the grinding wheel 4 for internal grinding are appropriately moved. To be Any grinding cycle (axial grinding, plunge grinding, oblique plunge grinding or even surface grinding) can be freely combined via the entered distance / time diagram, with almost no restrictions. The grinding wheel for internal grinding occupies a horizontal angular position during circular grinding, during shaping of grinding wheels (including grinding wheels for thread grinding) and during automatic wheel replacement.

(B) For thread grinding, the inner grinding wheel spindle 4 is brought to the programmed pitch angle. This angle adjustment, that is, the angle adjustment in the vertical direction, which is performed via the A axis, is performed during the pullback operation from the dressing. The rough grinding cycle is followed by one or more finishing grinding cycles during the course of the thread grinding cycle. The shape brought to the wheel before rough grinding or finish grinding is different in each case. Adjusting and adjusting the angle of the grinding wheel for internal grinding and automatic grinding wheel replacement are performed automatically through the program entered in the grinding machine.

FIG. 2 schematically shows an automatic turning device. The grinding wheel shaft 4 for inner surface grinding is shown by a broken line from the 0 position in the A axis direction by using a servo motor 11 and a ball roller spindle 12 around a turning point 10 located at the center of the grinding wheel. Is swung to the angular position of.

FIG. 3 shows the grinding operation of the wheel shaft for internal grinding in the horizontal position, and FIG. 4 shows the grinding operation of the wheel shaft at an angled, that is to say slightly swiveled from the horizontal position, FIG. FIG. 3 is a front view of the grinding shaft magazine 13.

A variety of wheels are required for different workpieces. The exchange of the grinding wheel is carried out automatically via the grinding shaft magazine 13, which is fixed on the inner grinding device and is hydraulically lowered towards the grinding wheel center for the replacement of the grinding shaft. be able to. The mounting in the grinding shaft magazine can be stored in the grinding machine controller and controlled appropriately.

[Brief description of drawings]

FIG. 1 is a plan view showing a layout of individual parts of a grinding machine according to the present invention.

FIG. 2 is a view showing a wheel shaft for inner surface grinding which can automatically turn.

FIG. 3 is a view showing working positions of a wheel shaft for inner surface grinding during inner surface grinding.

FIG. 4 is a view showing a working position of a wheel shaft for internal grinding during internal thread grinding.

FIG. 5 is a diagram showing the principle of a grinding shaft magazine.

[Explanation of symbols]

1 grinding machine table, 2 machining headstock, 3 lateral carriages, 4 grinding wheels for inner surface grinding, 5 grinding tables, 6 cylindrical grinding machines, 7 carriages, 8 grinding wheels, 9 adjusting rollers, 10 turning points,
11 servo motors, 12 ball roller spindles, 13 grinding axis magazines

Continuation of the front page (71) Applicant 390038047 Am Bahnhof, Ehringshausen, F.M. R. Germany (72) Inventor Manfred Leidetzker, Federal Republic of Germany Aslar Overlamp Dersutteuk 6

Claims (3)

[Utility model registration claims] 1. A grinding machine for automatically performing inner surface grinding, surface grinding, cylindrical grinding, screw grinding, or any combination thereof, which comprises an inner grinding wheel spindle and a work headstock arranged on a grinding table. In the type in which the inner grinding wheel shaft and the work headstock are relatively movable in directions perpendicular to each other, the inner grinding wheel shaft is It is possible to automatically turn to a desired angular position via a program input to the grinder on a vertical plane centered on the center, and for the purpose of dressing the grinding wheel, beside the machine headstock in the horizontal position. A grinding machine characterized by being able to pass by a forming roller arranged. 2. A grinding shaft magazine which can be lowered around the wheel shaft is arranged on the inner grinding wheel shaft in order to automatically change the grinding shaft according to the wheel wheel required each time. The grinding machine according to claim 1. 3. The movement process of the inner grinding wheel spindle, the work headstock and the grinding spindle magazine for the purpose of the grinding process, the dressing process and the exchange of the grinding shaft is automatically performed through a program input to the grinder. The grinding machine according to claim 1 or 2, wherein the grinding machine is controlled by.