JPH0445769Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an adapter that has a shank that engages with a spindle of a machine tool and a face plate that attaches a cutter provided at the tip of the shank.

[Technical background and conventional technology] When using a machine tool for milling or boring, it is necessary to prepare many cutters depending on the material of the workpiece, the shape and dimensions of the processing tube, etc. There is.

These cutters have a shank that engages with the spindle of a machine tool, and the required cutting tool is formed at the tip. The shape of the shank includes a cylindrical straight shank and a conical tapered shank, which are appropriately selected depending on the type of machine tool.

A cutting tool generally has a tip embedded in the cutter body, and when it becomes worn, only the tip needs to be replaced. Conventionally, this type of cutter had a one-piece structure, so preparing a large number of cutters with high-precision shank required a large amount of processing cost, and cutters for special purposes were not used. There was a lot of waste, as if it had been stored in a warehouse for a long time.

[Purpose of the invention] Therefore, the present invention provides an adapter that solves the conventional inconvenience by preparing a cutter and an adapter with a shank separately and making the cutter replaceable.

[Configuration of the invention] The cutter mounting adapter according to the invention includes a piston rod inserted into the shank, a taper cone provided at the tip of the rod, a disc spring that constantly biases the piston rod, and a disc spring that forces the piston rod to act when the cutter is attached or removed. a piston that abuts against and presses against the tapered cone and slides in the radial direction of the face plate, and engages with an oblique groove formed in the piston;
It consists of a tightening member that protrudes parallel to the axis of the shank and holds the cutter.

[Operations and Effects of the Invention] As described above, in the present invention, a piston rod having a tapered cone is provided in the shank, and the piston that comes into contact with the tapered cone holds the clamping member of the cutter by the action of the diagonal groove. There is. When replacing the cutter, apply hydraulic pressure to the piston rod and move the piston rod against the disc spring to loosen the tension between the clamping member and the cutter and attach or remove the cutter. Normally, the cutter is held firm by the stress of the disc spring. Since the cutter according to the application can be attached to the adapter with a single touch, the cutter can be attached to the adapter and engaged with the spindle of the machine tool, greatly improving machining efficiency and eliminating the need for expensive cutters. It can be operated efficiently.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

Figures 1 to 3 show an example of a cutter tool applied to the present invention, in which a cutter body 1 has a mounting hole 2 formed in the center that engages with an adapter, and a chip in the periphery. 3 is installed. To install cutter tip 3, use wedge 4.
A known means using a screw 5 is used, and in the illustrated embodiment, 28 chips are planted to form a milling cutter.

In addition, at four locations on the same circumference of the cutter body,
Hole 6 for fixing the cutter body to the adapter
is provided. This hole 6 is in the shape of a long hole, and has a seating surface 7 for tightening, as shown in FIGS. 2 and 3.

Next, FIGS. 4 to 6 show an adapter of the present invention to which this cutter is attached, and the adapter is composed of a shank 10 and a face plate 11 for holding the cutter. The shape of the shank 10 is adapted to the type of spindle of the machine tool to which this tool adapter is attached, and although a straight shank is shown in the illustrated embodiment, a tapered shank or the like may also be used if necessary. .

A cylinder chamber 12 is formed inside the shank 10, and a piston rod 1 is inserted into the cylinder chamber 12.
A piston 14 with 3 is inserted. A cylinder head 15 is fixed to the end of the cylinder chamber 12 of the shank with bolts 16, and a hydraulic pressure supply hole 17 is formed in the cylinder head 15. A large number of disc springs 18 are fitted on the outside of the piston rod 13, and constantly bias the piston 14 toward the cylinder head (right side in FIG. 4).

A taper cone 20 is screwed into the tip of the piston rod 13.
0 slides integrally with the piston rod on the inner surface of a hole 21 formed in the center of the face plate 11.

A radial hole 22 is formed from the center hole 21 toward the peripheral surface of the face plate. In the example,
Four holes 22 are formed at 90° intervals, and a plug 23 is inserted into a stepped hole at the bottom of each hole 22. The tips of the legs of the plug 23 are in contact with the taper cone 20, and as the taper cone 20 moves, the plug moves in the radial direction of the face plate.

A piston 30 is disposed at the head of the plug 23 via a disc spring 24, and the other end of the piston 30 is pressed by another disc spring 25. A cap 26 is attached to the outside of the disc spring 25 to hold it down.

Therefore, the piston 30 slides in the axial direction within the hole 22 in accordance with the movement of the plug 23, but this piston has a cylinder with a portion cut off to a flat surface, as also shown in FIG. , a diagonal groove 31 is formed on this flat surface.

On the other hand, a hole 32 is formed perpendicularly to the edge of the radial hole 22 of the face plate and penetrates from the front surface to the back surface of the face plate, and a cutter tightening member 33 is inserted into this hole 32. This tightening member 33 is formed in such a size that the head 34 passes through the hole 6 of the cutter 1 and engages with the seat surface 7, and the portion inserted into the hole 32 forms a flat surface 35. A protrusion 36 is made to protrude from the flat surface 35.

This protrusion 36 engages with the diagonal groove 31 of the piston 30, and both constitute a slide key mechanism. Therefore, when the piston 30 moves in the axial direction, due to the action of this slide key,
The tightening member 33 is also driven in the axial direction according to the angle of the oblique groove.

Next, the operation of this adapter will be explained.

When hydraulic pressure is supplied to the hydraulic pressure supply hole 17 of the adapter attached to a suitable holder, the piston 14 receives the hydraulic pressure and moves the piston rod 13 to the left in FIG. 4 against the disk spring 18. As a result, the taper cone 20 at the tip of the piston rod also moves toward the cutter.

As the taper cone 20 moves, the plug 23 connected to this taper surface is also pushed by the disc spring 24 and moves forward toward the taper cone. piston 3
0 is similarly pushed forward by the disc spring 25, and the tightening member 33 protrudes outward from the face plate 11 of the adapter by the action of the slide key. In this state, engage the mounting hole 6 of the cutter 21 with the tightening member 33, turn the cutter, and attach the tightening member 33 to the seat surface 7.
The head 34 of is brought into contact with the head 34 of the After the heads of the four tightening members are brought into proper contact with the seat surface 7, when the hydraulic pressure is cut off,
The piston 14 is pushed out by the disk spring 18, and the tapered cone 20 is pulled back. This action pushes the plug 23 and piston 30 outward, and the action of the slide key pulls the tightening member 33 back toward the face plate 11.

Therefore, the four tightening members 32 press against the seat surface 7 of the cutter and strongly tighten the cutter 1 to the adapter. Since the tightening force is always maintained by the disk spring 18, the tightening will not loosen inadvertently even while the cutter is in use.

Note that when moving the taper cone 20, instead of applying hydraulic pressure to the outside of the piston 14,
The taper cone 20 may be pulled out by inserting an appropriate tool from the opening 21 side of the face plate 11.

[Summary] As described above, with this invention, the cutter can be attached and detached from the tool adapter with a single touch, which greatly reduces the time required to change tools in milling processes that use many types of cutters, and improves machining efficiency. be effective.

[Brief explanation of the drawing]

Figure 1 is a side view of the cutter applied to the present invention.
Fig. 2 is a front view, Fig. 3 is a YY sectional view of Fig. 2, Fig. 4 is a side view showing an embodiment of the present invention, and Fig. 5 is a side view showing an embodiment of the present invention.
The figure is a front view, and FIG. 6 is a sectional view taken along line XX in FIG. 4. 1...Cutter, 3...Tip, 10...Adapter shank, 11...Face plate, 13...Rod, 14...Piston, 17...Hydraulic pressure supply hole, 1
8... Disc spring, 20... Taper cone, 23...
... Plug, 24, 25 ... Belleville spring, 30 ... Piston, 31 ... Diagonal groove, 33 ... Tightening member, 36 ...
…protrusion.

Claims (1)

[Scope of utility model registration request] a shank that engages a spindle of a machine tool;
In an adapter that has a face plate provided at the tip of the shank to which a cutter is attached, the adapter includes a piston rod inserted into the shank, a taper cone provided at the tip of the rod, a disc spring that constantly biases the piston rod, and a plate spring that presses the piston rod when the cutter is attached or removed. The means for pressing the shank against the disc spring contacts the taper cone, engages the piston that slides in the radial direction of the face plate, and the diagonal groove formed in the piston, and plunges in parallel to the axis of the shank to release the cutter. An adapter for attaching a cutter, comprising a tightening member for holding the cutter.