JPH0585517U - Ball screw nut multi-tasking machine - Google Patents

Abstract

(57) [Summary] [Purpose] To enable all nuts of ball screws to be processed by one chuck in one device. A spindle spindle 11 having a chuck 12 for holding a nut 3 and driven to rotate, and a tool base 13 slidable in the vertical and horizontal directions with respect to the spindle spindle 11.
A tool table 13 mounted on the tool table 13 and holding a plurality of tool bits 15, a grindstone spindle 16 mounted on the tool table 13 for grinding the spiral groove 4 of the nut 3, and a tool table 13 The spindle tilting device 18 for horizontally supporting the grindstone spindle 16 at the time of dressing and tilting along the lead angle of the spiral groove 4 at the time of dressing, and the dresser 19 for the grindstone 17 of the grindstone spindle 16 attaches the nut of the ball screw. Configure a multi-tasking machine.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for processing a nut of a ball screw.

[0002]

[Prior Art]

 As shown in FIG. 3, the ball screw is a spiral ball circulation path formed by a spiral groove 2 provided on the outer peripheral surface of the screw shaft 1 and a spiral groove 4 provided on the inner peripheral surface of the nut 3. With a plurality of balls 5 interposed therebetween, the rotational movement of the screw shaft 1 is converted into the linear movement of the nut 3 through the rolling circulation of the balls 5.

The nut 3 of the ball screw requires machining of the flange end surface, outer diameter, end surface, inner diameter, spiral groove, etc. (see FIG. 1). Conventionally, machining of each part by a plurality of machine tools such as lathes and grinders is required. It was manufactured through.

[0004]

[Problems to be Solved by the Invention]

 An object of the present invention is to allow the nut of a ball screw to be machined in one chuck in one device.

[0005]

[Means for Solving the Problems]

 The present invention is a compound processing device for ball screw nuts, which is provided with: A spindle spindle that has a chuck for holding a nut and is driven to rotate, a tool base that can slide in the vertical and horizontal directions relative to the spindle spindle, and a tool that holds multiple tools that is mounted on the tool base. Table, a grindstone spindle mounted on the tool stand for grinding the spiral groove of the nut, a tool stand for horizontally supporting the grindstone spindle during dressing and tilting along the lead angle of the spiral groove during grinding. Spindle tilting device mounted on the top, grindstone dresser for the grindstone spindle mounted on the tool stand.

[0006]

[Action]

 While holding the nut material with the chuck of the main spindle, each part of the nut material is sequentially processed with each bite and grindstone of the spindle spindle to finish the nut of the desired shape and size. This makes it possible to perform all processing with one chuck.

[0007]

【Example】

 An embodiment of this invention will be described with reference to FIG. In the drawing, the nut 3 after processing is shown.

A spindle spindle 11 and a tool base 13 are arranged on the machine base so as to face each other. The spindle spindle 11 has a chuck 12 for holding the nut 3 during processing, like a normal lathe, and is rotationally driven by an electric motor (not shown). The tool base 13 is slidably supported in the vertical and horizontal directions with respect to the spindle spindle 11, as indicated by a double-headed arrow. It should be noted that the movement or positioning of the tool base 13 can be precisely performed by NC control as is well known in the art.

A tool holder 14 is attached on the tool holder 13, and a plurality of tool holders 15 are attached to the tool holder 14. For example, a turning tool 15a for turning the flange end surface 31, the outer diameter 32 and the end surface 33 of the nut 3, a turning tool 15b for roughing the spiral groove 4 and turning the inner diameter 34, and for finishing the spiral groove 4. Bytes 15c and the like are included.

The grindstone spindle 16 is also attached to the tool base 13. Since the grindstone spindle 16 is for grinding the spiral groove 4 of the nut 3 by the grindstone 17, the grindstone spindle 16 can be tilted at any time by the grindstone spindle tilting device 18. 2A and 2B illustrate the structure of the grindstone spindle tilting device 18. That is, the grindstone spindle 16 is swingably attached to the curved key material 20 along the trajectory of the curved elongated hole, the cylinder 22 is pinned to the bracket 21 fixed to the curved key material 20, and the tip of the piston rod is fixed to the grindstone spindle. It is connected to a bracket 23 attached to the base of the tilting device. With this, the attitude of the grindstone spindle 16 can be changed according to the advance / retreat of the piston rod of the cylinder 22, the grindstone 17 is supported horizontally as shown by the solid line when dressing, and the imaginary line is used when grinding the spiral groove 4. Tilt along the lead angle of the spiral groove 4 as shown.

A dresser 19 is mounted on the machine for dressing the grindstone 17 of the grindstone spindle 16. The dresser 19 oscillates as shown by the arc arrows to dress the grindstone 17 while the grindstone spindle 16 is supported horizontally as shown by the solid line in FIG. 2A.

[0012]

【The invention's effect】

 As described above, the combined machining device for ball screw nuts of the present invention is a tool that has a chuck for holding the nut and is driven to rotate, and a tool that can slide vertically and horizontally with respect to the spindle spindle. Table, a tool table mounted on the tool table to hold multiple tools, a grindstone spindle for grinding the spiral groove of the nut, a grindstone dresser for the grindstone spindle, and a horizontal grindstone for dressing the grindstone spindle. Since it is equipped with a spindle tilting device that supports and tilts along the lead angle of the spiral groove during grinding, all the nuts can be machined with one chuck, which not only improves work efficiency, but also chucks. It is possible to prevent machining errors caused by replacement. Therefore, according to this invention, it is possible to mass-produce the nut of the ball screw with high accuracy at a low cost.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment with a nut in section.

FIG. 2 is a front view (a) and a left side view (b) of a grindstone spindle tilting device.

FIG. 3 is a perspective view of a ball screw.

[Explanation of symbols]

 1 Screw Shaft 2 Spiral Groove 3 Nut 4 Spiral Groove 5 Ball 11 Spindle Spindle 12 Chuck 13 Tool Table 14 Tool Bit 15 Tool 16 Tool Grindstone Spindle 17 Grindstone 18 Grindstone Spindle Tilt Device 19 Dresser

Claims (1)

[Scope of utility model registration request] 1. A spindle spindle that has a chuck for holding a nut and is driven to rotate, a tool base that is slidable in vertical and horizontal directions relative to the spindle spindle, and a plurality of tools mounted on the tool base. Tool holder that holds the tool bit, a grindstone spindle that is mounted on the tool stand for grinding the spiral groove of the nut, and supports the grindstone spindle horizontally during dressing and along the lead angle of the spiral groove during grinding. A compound processing device for a nut of a ball screw, which comprises a spindle tilting device mounted on a tool table for tilting, and a dresser for a grinding wheel of a grinding wheel spindle mounted on the tool table.