JPH0215910A - Cutting tool fastening device - Google Patents

Abstract

PURPOSE:To shorten the time taken for tool replacement and improve both the workability and the safety by turning a rotary member having an internal screw, via a bevel gear by an adjusting member put at right angles to the axis of a tool to move a fastening member in the axial direction of the tool. CONSTITUTION:An adaptor body 1 is tightened to a shunk with a bolt via a key and an adjusting member 3 is turned to rotate a rotary member 4 so that a fastening member 5 is lowered down in the axial direction via a screw 42. The projection part 25 of the tool body 2 is therefore able to be inserted between a receival face 52 and the end face 62 of a fixing member 6. The pass-through part 24 of the tool 2 is placed at the receival part 53 of the fastening member 5 and a shaft part 63 is engaged in the insertion hole 22 of the tool 2. The tool 2 is turned until the key of the adaptor body 1 makes contact with the key groove 26 of the tool 2. The projection part 25 is placed in the middle position of the receival part 53 of the fastening member 5. The adjusting member 3 is turned in the reverse direction and the fastening member 5 is moved up in the axial direction to fix the tool body 2.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a cutting tool fastening device for attaching/detaching a cutting tool such as a milling cutter or a polling cutter to/from a machine tool. [Prior Art] Conventionally, a milling cutter, etc. In order to easily, quickly, and safely attach and detach the cutting tool to the spindle of a machine tool, the milling cutter is divided into an adapter body and a cutter body to achieve the above purpose. For example, this is disclosed in Japanese Utility Model Publication No. 18247/1983.

The technique disclosed in this publication involves dividing a milling cutter into an adapter body and a cutter body, installing a desired number of head bolts in the adapter body, and installing the bolts in the cutter body at positions corresponding to the bolts. It consists of a hole for the head to pass through and a so-called Daruma-shaped hole for locking the head. When the adapter body is attached to the spindle of a machine tool, the head is inserted into the through hole of the cutter body. The cutter body is then rotated by a predetermined amount to position the bolt in the head locking hole, and the cutter body is fixed to the adapter body by tightening the bolt.

Further, in Japanese Utility Model Publication No. 58-11465, a plurality of cutter bodies divided in the radial direction are inserted into an adapter body having a connecting member from the outer circumferential side toward the center, and the connecting members are tightened with bolts. It has also been disclosed that a plurality of cutter bodies are fixed to the adapter body.

[Problems with the prior art] However, the technology disclosed in the above-mentioned Japanese Utility Model Publication No. 18247/1983 requires at least four However, in order to attach and detach the cutter body from the adapter body, it is necessary to operate four or more tightening bolts, and this operation takes a considerable amount of time. At the same time, since the tightening bolt is installed on the outer peripheral side of the adapter body and on the front side in the axial direction, The head with the wrench hole for the tightening bolt is located on the bottom of the main body, and when the cutter main body is attached or removed, the cutter is always removed from the workpiece or the top of the machine table by at least the gap that allows wrench operation. The main body must be raised from the workpiece or the table surface, which poses problems such as the time loss required for these adjustments and the complexity of attaching and detaching the cutter main body to the adapter main body.

Furthermore, the technology disclosed in Japanese Utility Model Publication No. 58-11465 divides the cutter body that can be attached and detached from the adapter body into a plurality of fan shapes, and connects the cutter body to the adapter body using the same number of connecting members as the divided pieces of the body. Although it is used fixedly, machining errors occur in the fitting groove of the divided cutter body that is fixed to the adapter body and the fitting groove of the adapter into which the cutter body is inserted, and these errors accumulate and cause the cutter body to be fixed to the adapter body. In the state,
It is difficult to obtain a highly accurate workpiece, and when cutting with this milling cutter, a highly accurate machined surface cannot be obtained.1
The attachment and detachment of the cutter body to and from the adapter body must be done by operating the respective connecting members, and the ease of attachment and detachment of the cutter body cannot be said to be very good.

What is common to the above-mentioned conventional technologies is that they are used for relatively large cutting tools due to their structure, and are difficult to use as a relatively small cutting tool coupling device such as a polling cutter. It has points.

[Object of the Invention] The present invention has been made in view of the above-mentioned problems, and provides a tool in which the cutter body can be easily attached and detached from the adapter body, and the precision of the tool itself is extremely high. Moreover, it is an object of the present invention to provide a cutting tool fastening device that can be structurally easily adapted to even a relatively small tool.

[Means for Solving the Problems] The present invention solves the aforementioned problems by the following means.

That is, in a device for removably fixing a cutting tool main body to an adapter main body, the adapter main body has an adjustment member in the radial direction of the main body with a pedal gear provided at an end thereof, and a pedal gear that meshes with the pedal gear. The cutting tool body has a ring-shaped rotating member provided on the upper end surface and having a thread carved on the inner circumference in the axial direction of the main body, and a screw threadedly engaged with the thread of the rotating member is carved on the outer circumference. A fastening member provided with a receiving part is movable in the axial direction of the adapter main body from an end surface of the adapter main body by providing a space that allows the receiving surface of the receiving part to fit into at least a protrusion provided on the cutting tool main body. It is arranged like this.

[Operation of the Invention] According to the present invention, when the adjusting member provided in the radial direction of the adapter main body is rotated from the outer peripheral side of the main body, the rotating member meshing with the adjusting member through the besol teeth rotates, and this rotation causes the adjusting member to rotate. A fastening member screw-fitted to the rotating member moves up and down in the axial direction of the adapter body.

As described above, the fastening member is moved down until the protrusion provided on the cutting tool body can be inserted, and the through hole of the tool body is positioned in the position where the fastening member on the adapter body is located. After inserting the receiving part into the fitting hole of the tool body, rotate the tool body by a predetermined amount (until the key provided on the adapter body contacts the end of the key groove formed on the tool body). position the receiving part of the fastening member on the adapter body on the protrusion of the tool body, and then rotate the adjustment member of the adapter body with a wrench or the like to raise the fastening member, thereby fastening the tool body to the adapter body. Because of this, the tool body can be attached and detached from the outer periphery of the adapter body, and this operation can be performed extremely quickly and safely.

In addition, it is possible to form a plurality of adjustment members provided on the outer periphery of the adapter body, and although it is possible to attach and detach the tool body by operating one of the adjustment members, By operating the , the tightening force of the tool body to the adapter body is applied evenly, allowing accurate and firm fixation.

Furthermore, since the inner periphery of the rotating member and the outer periphery of the fastening member are screwed together, the device itself can be made extremely compact and can be used in a wide range of applications, from small cutting tools to large cutting tools. The cutting tool fastening device has the following configuration.

[Example] Hereinafter, embodiments will be described based on the attached drawings.

The figure shows a cutting tool fastening device according to the present invention.
Figure 1 is a cutaway front view of the main parts of the device, and Figure 2 is a front view of the device.
Figure 3 is a front view with the main part of the adapter body cut away, Figure 4 is a view of the axial end of Figure 3, and Figure 5 is the main part of the cutting tool (face milling cutter). FIG. 6 is a top view of FIG. 5, FIG. 7 is a top view in the axial direction of FIG. 5, and FIG. It is a broken front view, etc.

The cutting tool fastening device A according to the present invention includes an adapter main body 1
and a cutting tool main body 2, and an adjusting member 3, a rotating member 4, and a fastening member 5 are attached to the adapter main body, and the rotating member is prevented from being removed from the adapter main body by a fixing member 6.

The adapter main body 1 described above has a hole 11 in the central part into which the shaft of the shank 10 is fitted, and a keyway 12 in which the key 7 for preventing rotation is fitted. A hole 13 is provided.

A hole 14 into which the adjustment member 3 is fitted from the outer circumferential side toward the center of the main body, and a bearing hole 14a for the adjustment member are provided concentrically with the hole, and a center portion of the insertion hole 14 is provided. A rotating member 4 is provided with a means 14b (snap ring or bolt) for making the adjusting member rotatable and preventing it from being pulled out in the axial direction, and one side of the rotating member 4 is open below the insertion hole 14. A hole 15 into which the fixing member 6 is fitted, a spigot hole 16 into which the boss portion 61 of the fixing member 6 is fitted, and the like are provided.

The adjustment member 3, which is rotatably fitted into the insertion hole 14 of the adapter body, has a wrench hole (not shown) formed at one end and a pedal gear 31 (binion gear) at the other end. A shaft 32 for bearing the gear is inserted into the shaft hole 14a of the main body.

The rotating member 4 inserted into the shaft hole 15 of the main body 1 has a bevel gear 41 on its end surface that meshes with the pedal gear 31 of the adjusting member.
A screw 42 is carved on the inner circumference, and when the adjusting member is rotated based on the shaft hole of the main body, it rotates due to the engagement of gears, and is rotated by the fixing member 6 to prevent it from moving in the axial direction. It is fixed freely.

The fastening member 5 has a substantially fan-shaped screw 51 carved at a predetermined position on the outer periphery to engage with the screw 42 of the rotating member, and has a receiving surface 52 at the end for locking the protrusion of the cutting tool body 2. A plurality of receiving portions 53a, 53b, 53c53d are formed.

Note that this fastening member is screw-fitted to the rotating member,
By rotating the rotary member, the main body 1 is moved up and down in the axial direction, and the rotation is regulated by a pin 9 provided on the fixed member.

In order to facilitate attachment and detachment of the cutting tool 2, a predetermined gap S is created by constantly pressing the cutting tool 2 downward by the spiral 9b.

In the adapter main body 1 having the above-described configuration, when the adjustment member 3 is rotated with a wrench (not shown) or the like, the rotating member 4 that is meshed with the pedal gear rotates and is screwed into the rotating member. The fastening member 5 moves up and down in the axial direction of the main body.

As a result, a desired space S is formed between the end surface 62 of the fixing member 6 and the receiving surface 52 of the fastening member, and this space S
The cutting tool main body 2 is attached and detached by opening the cotton.

The cutting tool main body, which can be attached to and removed from the adapter main body described above, has a tip 20 of a predetermined shape fixed to the outer periphery, and a tip 20 of a predetermined shape is fixed to the upper surface side 21 to fit into the shaft portion 63 of the fixing member 6 on the adapter main body described above. A fitting hole 22 for positioning the main body 1 and the tool main body 2 in the same manner is provided, and a receiving hole 23 for accommodating the receiving portion 53 of the fastening member 5 is provided on the lower side.
are formed between the insertion hole 22 and the accommodation hole 23, through-holes 24a, 24b, 24c, and 24d through which the receiving portion 53 of the fastening member in the main body 1 is passed, and a protrusion portion for fixing the receiving portion. 25a, 25b, 25c25d are provided, and on the outside of the fitting hole 22 of the upper surface 21 is a key groove 26a into which the keys 8a and 8b on the adapter body are fitted.
26b is provided.

These key grooves 26a, 26b and protrusions 25a, 25b, 2
The positional relationship between 5c and 25d is such that the fastening member receiving portion 53 in the adapter body is connected to the through holes 24a and 24b in the tool body 2.
, 24C124d, key 8a on the adapter
, 8b are in contact with one end of the keyways 26a, 26b, the receiving surface of the fastening member is in contact with the protrusion 26a,
26b, 26c, and 26d, and the key is the key? When in contact with the other end surface of 1B26a, 26b, the receiving portion 53 penetrates through 24a, 24b, 24c,
It is formed so as to be located at the center of the tip of 24d.

Further, the thickness T of the projections 25a, 25b, 25C125d is the same as that between the end surface 62 on the adapter side and the receiving surface 5 of the fastening member.
It is provided so that it can be inserted into the empty question S formed by 2 and 2.

The operation of attaching and detaching the cutting tool body to and from the adapter body of the cutting tool fastening device A configured as described above is performed by first rotating the adjusting member 3 to rotate the rotary member, and then attaching and detaching the cutting tool body to the adapter body of the cutting tool fastening device A configured as described above. is moved downward in the axial direction to make the space S between the receiving surface 52 of the member and the end surface 62 on the main body side into a state in which the thickness T of the protrusion part 25 of the tool can be inserted, and then the through part 24 of the tool main body is inserted into the space S between the receiving surface 52 of the member and the end face 62 on the main body side. The insertion hole 22 of the tool body is fitted into the shaft part 63 of the adapter, and the main body 2 is rotated until the key 8 comes into contact with the end face of the key groove 26 of the main body 2, and the protrusion of the tool is With the part 25 positioned at the center of the receiving part 53 of the adapter, the adjusting member 3 is rotated in the opposite direction as described above, the fastening member 5 is moved upward in the axial direction of the device, and the fastening member 5 is moved upward in the axial direction of the device. The cutting tool main body can be firmly fixed to the adapter main body by the above-mentioned method, and when the tool main body is to be removed from the adapter main body, the above-described operation is reversed.

In addition, although the above-mentioned receiving part of the fastening member on the adapter main body side and the protrusion part on the cutting tool main body are formed in four places in the example, this is three or four or more places. The adjustment members 3 provided in the radial direction of the adapter body may also have 2111 or more adjustment members 3.

What is shown in FIG. 8 is a fastening device B according to the present invention in which a polling tool can be attached and detached, and a small-sized religious tool to which a hole machining tip 20a and a counterboring hole forming tip 20b are fixed. This device is designed to be attachable and detachable, and is different from the above-mentioned embodiments in that the rotation preventing means of the fastening member 5a is provided with a rotation preventing bolt 9a installed at a predetermined position in the radial direction of the fixing member 6a, and this head 91 This is intended to reduce the size of the fastening member 5a by fitting it into a groove 51a formed in the direction of the outer circumferential axis of the fastening member 5a.

Note that the reference numeral 100 is a shaft portion that is inserted into a mounting hole on the machine tool side (not shown), and the reference numeral 100a is a head screw that prevents the adjustment member 3 from moving in the axial direction.

[Effects of the Invention] With the configuration and operation described above, the present invention becomes an extremely wide-applicable device that can easily and accurately attach and detach from large tools to small tools, and reduces the time required to replace cutting tools. The width has been greatly shortened to improve workability and safety, and at the same time, the cutting tool body can be extremely firmly fixed to the adapter body, improving the precision of the workpiece and greatly extending the tool life. be.

[Brief explanation of the drawing]

The figure shows a cutting tool fastening device according to the present invention.
Figure 1 is a front view of the main parts of the device, and Figure 2 is the front view of the device.
Fig. 3 is a front view of the main part of the adapter body with the main part cut away. Fig. 4 is a main view of the axial end of Fig. 3. Fig. 5 is the main part of the cutting tool (face milling cutter). FIG. 6 is a top view of FIG. 5, FIG. 7 is a front view of the tip in the axial direction of FIG. This is a cutaway front view, etc. 1-1.-Adapter body 2-m-Cutting tool body 3
-m-adjustment member 4-m-rotating member 5.5a-sea fastening member 6.6a fixed member 7.8a, 8b-m-key 9.9a rotation stopper Figure θ

Claims (1)

[Claims] (1) In a device for removably fixing a cutting tool body to an adapter body, the adapter body has an adjusting member in the radial direction of the body, the end of which is provided with a bevel gear; A ring-shaped rotating member is provided in the axial direction of the main body, with a meshing bell gear provided on the upper end surface and a thread carved into the inner periphery, and a screw carved into the outer periphery to be screwed into the thread of the rotating member. In addition, the fastening member provided with the receiving portion for the cutting tool is moved from the end face of the adapter body to the shaft of the adapter main body, with a space that allows insertion of at least a protrusion provided on the cutting tool. A cutting tool fastening device characterized in that it is arranged so as to be movable in a direction.