JPS6031896Y2 - Tool shank support device in tool presetter - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a support device for a tool shank in a tool presetter.

When machining a workpiece using a machining center, the required number of tools required for the machining are set in a tool magazine.

By the way, the diameter and length of the above tools are measured in advance before being set in the tool magazine.

A tool presetter is used to measure the diameter and length of such tools.

The tool presetter is set to table 1, as shown in Figure 1.
A base 2 is movably provided along the upper surface of the base 2, and a bracket 4 is attached to a support 3 that stands up from the base 2 so that it can be raised and lowered. and supports.

In addition, a sleeve insertion hole 7 is formed on one side of the table 1, and a sleeve 8 is inserted into and supported by this sleeve insertion hole 7, and a pull stud of a tool inserted into the tapered hole 9 of the sleeve 8 is held. A mechanism is provided below it to pull it downward.

To measure the length and outer diameter of a tool, insert the tool to be measured into the tapered hole 9 of the sleeve 8, grasp it, and pull it downward. The scale provided on the handle 10 is read when the diameter measuring probe 5 comes into contact with the cutting part of the tool by rotating the base 2 and moving the base 2.

Also, the bracket 4 is moved by rotating a handle 11 provided on the bracket 4, so that when the length measuring probe 6 comes into contact with the cutting edge of the tool, the main scale 12 provided on the support column 3 is read. ing.

Since there are standard and non-standard products for the taper shank and pull stud of tools used in machining centers, tool presetters have a mechanism that grips and pulls the shank end of each tool. A variety of types are available, and a tool shank chucking mechanism corresponding to the tool to be measured is attached to the inside of the sleeve.

However, in the past, the sleeve inserted into the sleeve insertion hole was pulled out above the table and the sleeve corresponding to the tool shank was replaced, which took time and effort, and the accuracy of the fit between the sleeve and the sleeve insertion hole was poor. Because of the height, it is difficult to pull out and insert the sleeve, and there is a risk that chips and dirt may enter the sleeve insertion hole.

Therefore, the present invention provides a tool shank support device that allows only the chucking unit body provided inside the sleeve to be easily replaced without replacing the sleeve.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIGS. 2 to 5, the sleeve 22 inserted into the sleeve insertion hole 21 of the table 20 has a flange 23 on the upper outer circumference, and this flange 23 is attached to the table 20.
is in contact with the top surface of the

Further, the sleeve 22 is provided with a tapered hole 24 at the upper inner side,
A unit insertion hole 25 is formed below the tapered hole 24.

A chucking unit main body X is inserted inside the unit insertion hole 25.

This chucking unit main body 26' and is prevented from coming out upwards.

A flange 28 is formed on the lower part of the outer periphery of the inner cylinder 27, and a notch 29 is provided at a position facing the outer periphery of the flange 28, as shown in FIG.

On the other hand, at the lower end of the sleeve 22 there are two dowel pins 3.
0 is attached, and this dowel pin 30 is shown in FIGS. 2 and 3.
As shown in the figure, it is fitted into the notch 29 of the inner cylinder 27 to prevent the inner cylinder 27 from rotating relative to the sleeve 22.

The lower part of the sleeve 22 passes through the sleeve insertion hole 21 and protrudes downward, and a screw 31 is formed on the outer periphery of the lower part, and a tightening nut 32 is screwed into the screw 31.

A notch 2 of the inner cylinder 27 is located at a position facing the inner circumference of the tightening nut 32.
A pair of tightening pieces 33 corresponding to the inner cylinder 2 are formed, and when the tightening nut 32 is rotated and tightened, the tightening pieces 33 are attached to the inner cylinder 2.
7 and pushes it up.

The width of the tightening piece 33 is smaller than the width of the notch 29.

As shown in FIGS. 3 and 4, an arc-shaped guide groove 34 is formed on the inner periphery of the tightening nut 32, while the sleeve 2
2 has a positioning pin 3 that fits into the guide groove 34.
5 is fixed, and the tightening nut 32 is rotatable within the range limited by the pin 35, and the tightening nut 32 is rotated in the loosening direction to position one end 34' of the guide groove 34. When it comes into contact with the pin 35, the notch 29
A tightening piece 33 corresponds to the lower part of the .

A tapered shank A of a tool is inserted into the tapered hole 24 of the sleeve 22.

A pull stud B is formed at the lower end of the tapered shank A, as shown in FIG.

A chuck mechanism 40 for holding the pull stud B is provided at the inner upper part of the inner cylinder 27, and a slide mechanism 60 for moving the chuck mechanism 40 in the axial direction is provided at the inner lower part of the inner cylinder 27.

There are many chuck mechanisms 40, but in FIG. 2, a cylinder 41 is slidably and non-rotatably attached inside the inner cylinder 27, and a screw shaft 42 is provided at the lower end of the cylinder 41. A plurality of tapered holes 43 are formed in the upper part of the cylindrical body 41,
A part of the outer periphery of the ball 44 inserted into the tapered hole 43 can go in and out of the cylinder 41, while a small diameter hole 45 is provided inside the inner cylinder 27 to prevent the ball 44 from moving outward. , and the ball 44 is placed above the small diameter hole 45.
A large-diameter hole portion 46 is formed to allow movement of the material in the outward direction.

With this configuration, by positioning the pull stud B inside the cylindrical body 41 and moving the cylindrical body 41 downward, the ball 44 is moved to a position where the ball 44 faces the inner periphery of the small diameter hole 45. moves inward, and a portion of the outer periphery of this ball 44 engages with the large diameter shaft portion B' of the pull stud B.

Furthermore, the chuck mechanism 40 shown in FIG. A spring 49 is provided to move both the inner cylinder 2 outward.
A tapered step portion 50 is formed at the upper part of the inner periphery of 7.

The upper part of the screw shaft 51 is connected to the lower part of the pair of half cylinders 47 so as to be engaged against movement in the axial direction.

As a result, when the pull stud B is inserted between the pair of half-cylindrical bodies 47 and the screw shaft 51 is pulled down, the half-cylindrical body 47 is moved against the spring 4 by the abutment between the tapered steps 48 and 50.
The pull stud B can be gripped by the pair of half cylinders 47 by moving inward against the elastic force of the pull stud B.

Slide mechanism 6 that moves the chuck mechanism 40 in the axial direction
As shown in FIG. 2, a handle shaft 61 is inserted into the inner lower part of the inner cylinder 27 and is rotatably supported but not movable in the axial direction. 62 and the screw shaft 42, and the handle shaft 6
A handle 61' is attached to the lower end of 1.

The tool shank support device shown in the embodiment is omitted from the above structure, and the taper shank A of the tool is inserted into the taper hole 24 of the sleeve 22, and the pull stud B at the lower end is connected to the cylinder body 41 or semi-cylindrical body of the chuck mechanism 40. 47 and rotate the handle 61' to pull down the screw shaft 42.51 of the chuck mechanism 40 in the axial direction.
grips pull stud B and pulls down the tool.

Therefore, the outer periphery of the tapered shank A can be brought into close contact with the tapered hole 24 of the sleeve 22, and the tool can be supported in a posture that allows accurate measurement of the outer diameter and length of the tool.

There are standard products and non-standard products for the shank and pull stud of the tool to be measured, and when measuring each of these tools, the chucking unit body has a chuck mechanism compatible with the tool to be measured. It is necessary to attach X.

When replacing the chucking unit main body X, loosen the tightening nut 32 shown in FIG. corresponds to the lower part of the notch 29, and in this state, the chucking unit main body X is pulled out below the sleeve 22.

In addition, when setting the chucking unit body X in the sleeve 22, insert the chucking unit body When the chucking unit main body X is moved upward until it protrudes downward from the cylinder 27, and the tightening piece 33 protrudes downward from the lower surface of the inner cylinder 27,
The tightening nut 32 is rotated in the tightening direction.

As the tightening nut 32 rotates, the tightening piece 33 rotates and moves upward, so the tightening piece 33 comes into contact with the lower surface of the inner cylinder 27 and prevents the chucking unit body X from being pulled out downward. It can be prevented.

7 to 9 show other embodiments of the support device according to this invention.

The tightening piece 33 formed on the tightening nut 32 has a semicircular shape, while the flange 28 of the chucking unit body
is provided with a projecting piece 70 that can be inserted between adjacent tightening pieces 33.

Now, when the tightening nut 32 is loosened and the positioning pin 35 is brought into contact with the shoulder 34' of the guide groove 34, the adjacent tightening piece 3
The protruding piece 70 corresponds between the chucking unit body X and the chucking unit main body X from the sleeve 22 at this position.

In the above device, a pair of knock pins 30 are provided on the lower surface of the sleeve 22, and a projecting piece 7 is provided between the knock pins 30.
0 to prevent the chucking unit main body X from rotating.

Further, in the embodiment, the chucking unit main body X is formed by inserting the inner cylinder 27 inside the outer cylinder 26, but the structure of the main body X is not limited to this. For example, the outer cylinder 26 and the inner cylinder 27 It is also possible to have an integrated structure.

As described above, according to this invention, when the tightening nut is rotated to loosen and the nut does not turn in the same direction, the tightening piece provided on the inner circumference of the tightening nut is attached to the flange of the inner cylinder. A chucking unit having a chuck mechanism and a slide mechanism for moving the chuck mechanism in the axial direction at this position so as to correspond to the formed notch or to correspond to the protruding piece provided on the flange between the clamping pieces. The main body can be easily pulled out from below the sleeve.

In addition, by inserting the chucking unit body into the inside of the sleeve from below, positioning the tightening piece of the tightening nut below the bottom surface of the inner cylinder, and then rotating the tightening nut in the tightening direction. Since the tightening piece of the tightening nut engages with the lower surface of the inner cylinder and pushes up the inner cylinder, the chucking unit main body can be replaced easily and quickly. .

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the tool presetter, Fig. 2 is a partially cutaway front view showing an embodiment of the sleeve support structure according to this invention, and Fig. 3 is taken along the line ■-■ in Fig. 2. 4 is a sectional view taken along the line IV-IV in FIG. 3, and FIG.
The figure is a sectional view taken along the line ■-■ in Figure 3, Figure 6 is a partially cutaway front view showing another embodiment of this invention, and Figure 7 is a further embodiment of the device according to this invention. Cross-sectional bottom view showing an example,
8 is a cross-sectional view taken along the line ■--■ in FIG. 7, and FIG. 9 is a cross-sectional view taken along the line IX--IX in FIG. 7. 20...Table, 21...Sleeve insertion hole, 22...Sleeve, 23...
Flange, 24...Tapered hole, 25...
・Unit insertion hole, X... Chucking unit body, 26... Outer cylinder, 27... Inner cylinder, 28... Flange, 29... ... Notch, 30 ... Dowel pin, 31 ... Screw, 32 ... Tightening nut, 33 ... Tightening piece, 34 ... ... Guide groove, 35 ... Positioning pin, 40 ... Chuck mechanism, 60 ...
...Slide mechanism, 70... protrusion.

Claims (1)

[Scope of utility model registration request] A sleeve is inserted into the sleeve insertion hole formed in the table, and the flange formed on the upper outer periphery of the sleeve is brought into contact with the top surface of the table. A chucking unit main body is inserted into the unit insertion hole of the sleeve, and a chucking mechanism is provided on the inner upper part of the chucking unit main body that can be secured to a pull stud of a tool, and A slide mechanism for moving the chuck mechanism in the axial direction is provided at the inner lower part of the chucking unit body, a flange is formed at the lower outer periphery of the chucking unit body, and means for preventing rotation of the chucking unit body with respect to the sleeve. give,
A plurality of fastening pieces are provided on the inner periphery of a tightening nut that is screwed onto a screw formed on the lower outer periphery of the sleeve to prevent the chucking unit main body from being removed, and a plurality of fastening pieces are provided on the flange of the chucking unit main body. , forming an insertable notch in the tightening piece or a projection piece that can be inserted between adjacent tightening pieces, and a position where the tightening piece stops below the notch;
Alternatively, a support device for a tool shank in a tool presetter is provided with a positioning mechanism that restricts the rotation of a tightening nut in the loosening direction at a position where it stops below a protruding piece between adjacent tightening pieces.