JPS6039002A - Fixture for cutting chip - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The invention particularly relates to the attachment of cutting tips, usually made of tungsten carbide, to the boring bar of a boring machine, or to any other shape of tool holder used in turning operations. Although the invention will be described with reference to boring bars, it will be understood that the invention includes other tool holders.

It is known to provide a four-part recess at the outer working end of the boring bar, the recess being complementary to the shape of the cutting tip to be used. For example, the recess may include one engagement wall that is angled 600 degrees to each other to receive and securely position a cutting tip having an equilateral triangular shape. After positioning the cutting tip within the complementary recess, the cutting tip is attached by passing a screw from the tip to the end of the boring bar. In this case, the screw is slightly eccentric, so that when the screw is tightened it tends to force the cutting tip against the complementary four walls.

It is also known to provide a boring bar with a recessed seating surface having substantially parallel opposing side walls, the overall direction of the recessed seating surface forming an angle with the longitudinal axis of the boring rod. I am doing it. The clamp for attaching the cutting tip to the end of the boring bar is provided with a block, the underside of which is carved or stepped to form a shoulder, so that the clamp is When the block is attached to the boring bar, a recess is formed by the side walls and base of the recessed seating surface and the bottom surface and shoulder of the block. The recess is of a complementary shape to the shape of the cutting tip to be used. The clamp passes a screw through the block to attach the cutting tip received within the block and the recess to the end of the boring bar. With this structure, when the blade or cutting corner becomes worn, the cutting tip is removed by loosening the tightening screw and rotated to return the cutting tip to the recess, leaving the unworn edge or cutting corner ready for the next use.

A disadvantage of both of the boring bar mounting structures described above is that for each different shape of cutting insert to be used a different boring bar or at least one different clamping block must be provided. Such replacement of boring bars or clamping blocks is inconvenient and relatively time consuming.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tool holding device d with an operable universal cutting tip mounting device, so that two or more separate configurations of cutting tips can be received and mounted by this device. .

According to the present invention, in a tool holding device comprising a main body member having an end portion for attaching a cutting tip, and a tightening tool for removably attaching the cutting tip to the end portion, a seating recess configured between the tool and the tool for receiving a cutting tip having a feature selected from at least one different cutting tip feature, the seating recess having a locating portion for each of said tip features; , each positioning portion comprising at least one engagement zone for engaging a respective cutting tip to securely position said cutting tip within a seating recess. A tool holding device is provided.

The tool holding device comprises an assembly of a body member and a clamping tool which together define a seating recess, by means of which one or more cutting tips of different configurations can be positioned in a desired position. It can be easily and reliably positioned and fixed. For example, if the body member consists of a boring bar, there is no need to change the boring bar if a different tip feature is required; instead, it is possible to choose between any of a number of different tip features prior to the boring operation. 7 can be easily attached to the end of a boring bar. The body member and the fastening can make the locating part by the end of the body member rather than by the assembly with the tool, and thus, according to the first aspect of the invention, the end for attaching the cutting tip. a tool holding device having a body having a seating recess defined at least in part by the end portion, the seating recess having a cutting tip having a configuration selected from at least two different cutting tip configurations; wherein the seating recess has a locating portion for each of the tip features, each locating portion engaging each cutting tip to securely position the respective cutting tip within the seating recess. at least seven retention zones for each tip feature, the body member comprising at least one engagement zone for mating the cutting tip received within the seating recess, at least seven retention zones for each tip feature; A tool holding device is provided in which a lockingly operable clamp is adapted to be assembled with a tool. This structure further provides the advantage that two or more differently shaped cutting tips can be easily positioned and mounted by the device.

Additionally, at least seven of the positioning portions may be provided with a fastener for securing the cutting tip to the body member. According to a third aspect of the invention, therefore, in a tool holding device having a clamping tool adapted to secure a cutting chip to a body member having an end for receiving the cutting chip, the clamping tool is configured with the body member to form a seating recess for receiving a cutting tip having a feature selected from at least one different cutting tip feature, said seating recess having a feature selected from said tip feature. locating portions for each of the cutting tips, each locating portion including at least one retention zone for engaging each cutting tip to securely position the respective cutting tip within the seating recess. A tool holding device is provided, characterized in that at least seven engagement zones for each tip feature are created by said clamping tool. Again, by providing seating recesses with locating portions for different tip configurations, different tips can be installed without replacing the body member.

Regardless of whether the positioning portion of the seating recess is made by the main body member, the tightening is made by a tool, or by an assembly of these λ components, the simplest structure of this device is one. or by configuring the positioning portion for the tip features such that the tip features form a composite feature. That is, the seating recess is preferably shaped to form a plurality of engagement zones, of which seven tips are capable of mating with each unique combination of engagement zones.

Several configurations of the body member and fasteners are possible to form the engagement zone. In the first configuration, both the fastener and the body member each define at least seven of the engagement zones. According to this possibility, a particular construction of the invention provides that the clamping device comprises a clamping device in the form of a block;
The clamping block can be secured to the body member so as to define a seating recess together with the body member. The clamping block preferably has a stepped lower surface to create a shoulder forming at least one of the engagement zones, with the remaining engagement zones not being formed by the shoulder but by the body member. It is formed. Preferably, the body member has a recessed seating surface configured to receive the cutting tip and the clamp also receives the block. The recessed seating surface of the body member has side walls, these side walls forming the remaining engagement zone, and in this construction, the clamping surface is connected to the wall of the recessed seating surface when the block and the body member are assembled together. The shoulders of the blocks come together to form an engagement zone for the cutting pit.

In a first possible construction of the invention, the retention zone of the seating recess may be created entirely or at least in part by a feature of the body member. In particular, the body member may have a recessed seating surface for receiving the cutting tip, and the clamping tool may include a tightening block configured to fit relatively snugly within the recessed seating surface. The block has a lower surface,
The lower surface is recessed toward and in spaced relation with the recessed seating surface, and the recessed lower surface of the clamping block is shaped to define a plurality of retention zones.

Some possible and preferred embodiments of the tool holding device according to the invention will now be described with reference to the accompanying drawings.

Referring first to Figures 1 to 6, the tool holding device includes a body member 10 in the form of a boring bar 11 having an outer end 12 for mounting a cutting tip 15 (Figure S or Figure 6). and a clamping device 2 in the form of a block 21 for releasably attaching the cutting tip 15 to the outer end 12.
0.

The clamping means that when the block 21 is attached to the end 12 of the boring bar 11, a seating recess 14 is formed for receiving the cutting tip 15. Preferably, the cutting tip has a configuration selected from at least two cutting tip configurations. The seating recess 14 has a locating part for each tip feature, each locating part having seven engagement zones 25, 26, 27, 28, 29 for engagement of a different cutting tip 15, thus The cutting tip is reliably positioned within the seating recess 14.

7 to 6, the boring bar 11 and the clamping block 21 are assembled together, and the seating recess 1 is inserted between them.
4 is formed, the retaining zone of the seating recess 14 is created by the boring bar 11 and the clamping block 21. The seating recess 14 is shaped to create a plurality of engagement zones [25-29, with seven cutting tips 15 of the plurality of features engaging each particular combination of engagement zones 25-29. do. With particular reference to FIG. 5, the illustrated square or rectangular cutting tip 16 engages the engagement zones 26, 27, 29. However, the equilateral triangular cutting tip 17 shown in FIG. 6 engages the engagement zones 25, 28.degree. 29.

Referring in particular to the specific structure shown in FIGS. 1 to 6 in more detail, the clamping device 2o consists of a clamping block 21;
This block can be attached to the boring bar 11 so as to form a seating recess 14 with the boring bar 11.

The clamping block 21 has a stepped lower surface 30 to create a shoulder 31, said shoulder forming an engagement zone 27,28. The remaining engagement zone 25 not created by the shoulders
．． 26.29 is made by the boring bar 11. As shown in the figure, the shoulder portion 31 has a shallow overall V when viewed from above.
shaped features, thus creating a flat engagement surface or retention zone 27,28.

The boring bar has a recessed seating surface 32 configured to receive the cutting tip 15 and the clamp also receives a shoulder 31 of the block 21. Recess seating surface 32 of boring bar 11
has side walls that constitute the remaining retention zone 25°26.29. In this structure, the tightening is done between the block 21 and the boring bar 1.
1 together, the walls of the recessed seating surface 32 and the shoulder 31 of the clamping book 21 together create engagement zones 25-29 of the cutting tip 15.

The boring bar 11 is generally of conventional construction and is therefore generally cylindrical and has a longitudinal axis, the outer end 12 of the cylindrical boring bar 11 being adapted for mounting a cutting tip 15. The inner end portion 13 is adapted to be attached to a chuck of a boring machine or the like. The outer end 12 of the boring bar 11 is ground to create an upper surface 40 and a recessed seating surface 3.
2 is formed in the upper surface 40 and extends generally in a direction forming an angle with the longitudinal axis of the hollow bar 11, and has a recessed seating surface 32.
is open at the outer end 12 so that the cutting corner or edge of the cutting tip 15 can extend beyond the circumference of the boring bar 11. The recessed seating surface 32 has generally parallel side walls 26.degree. 29 that form opposed retaining surfaces for positioning the cutting tip 15. Seating side wall 26.29
extend inwardly beyond the portion of said seating side wall forming a retaining surface, whereby the clamping recesses the block 21 and partially accommodates it at the inner end of the seating surface.

The tightening block 21 has a base 22 configured to fit within the inner end of the recessed seating surface 320 and a recessed seating surface 32 .
a clamping portion 23 configured to sit over the cutting tip 15 positioned at the outer end of the base 2 .
2 and the tightening part 23 is the seating recess 14.
forming the inner end of the Tighten the block 21 at the base 22
It is configured to be attached to the boring bar 11 by a screw (not shown) passed through the bore hole 42 and into a threaded hole 42 in the inner end of the recessed seating surface 32 of the boring bar 11.

The upper surface of the outer end of the clamping section 23 is sloped to the chisel edge at the outermost end of the clamping section 23 to create a chip breaker surface 43 for use in boring operations. As commonly circumscribed, the chip breaker surface 43 acts to bend or curl the metal shavings being removed from the workpiece, allowing the swarf to move away and be removed without interfering with the boring operation. Make it possible to remove debris. The chip breaker can also be made on the outer upper part of the cutting tip 15 as in the prior art.

In the embodiments shown in FIGS. 1 to 6, the seating recess 14 can accommodate both the square-shaped cutting tip 7''16 and the equilateral triangular-shaped cutting tip 11fu0.

In this embodiment, the shoulder 31 created by the clamping bronze 2210 stepped underside forms two retaining surfaces 27,28. The first of these engagement surfaces 27 (tightening occurs when the block 21 is attached to the boring bar 11) is perpendicular to the parallel side walls 26, 29 of the corner seating surface 32. In this configuration, the circumference of the square cutting tip 16 (FIG. S) engages the first retaining surface 27 and the side wall 26.29 of the recessed seating surface. That is, the three edges around the rectangular shape of the cutting tip 16 are connected to one opposing parallel side wall 26° 29 of the recessed seating surface 32 and to the locking surface made by the first shoulder surface 27 of the block 21. Reliably positioned or at least tightly constrained by a target retaining surface.

The other retaining surface of the shoulder portion 31, that is, the first retaining surface 28, is
The near side wall 29 of the recessed seating surface 32, i.e. the boring bar 11 from which the cutting tip 15 is arranged to protrude.
It is arranged at an angle of 60° with the side wall 29 which is closer to the side. The angled first engagement surface 28 meets the perpendicular seventh engagement surface 27 near the longitudinal axis of the block 21 . Thus, the equilateral triangular cutting tip 1
7 (FIG. 6), the seven edges engage the proximal side wall 29 of the recessed seating surface 32, i.e. are tightly constrained by this side wall, and some of the adjacent edges of said cutting tip are clamped. is positively positioned within the seating recess 14 by engaging the second diagonal retaining surface 28 of the shoulder 31 of the block 21 . If desired, the distal sidewall 26 of the recessed seating surface 32 terminates in line with the first diagonal retaining surface 28, as shown, and the outwardly facing wall portion of the recessed seating surface 32 25 is preferably provided to constitute a retaining zone for the edge of the equilateral triangular cutting tip 17. The outwardly facing wall 25 is formed as a line extension of the first diagonal engagement surface 28 .

In operation of the preferred embodiment of the invention for mounting square and equilateral triangular cutting tips 16,17 as shown and described in FIGS.
It is preferable to loosely attach the block 21 to the boring bar 11 by fitting the base 22 of the block 21 into the inner end of the recessed seating surface 32 of the boring bar 11. The four seating parts 14 are clamped against the underside 30 of the clamping part 23 of the block 21, against the shoulder 31 of the block 21, by opposing parallel side walls 26, 29, and by the outwardly facing wall 25. and the recessed seating surface 320 of the boring bar 11.
The four seating portions 14 are configured to accommodate either a square cutting tip f16 or an equilateral triangular cutting tip 17. For example, as shown in FIG. 5, a rectangular cutting tip 16 is inserted into the seating recess 14, and both edges of the rectangular cutting tip 160 are engaged with parallel walls 26 and 29 facing the recessed seating surface 320 of the boring bar 11. or the said parallel wall and the shoulder 3 of the block 21
1 and a first right-angled retaining surface 27. Thus, the square cutting tip 16 is placed in the seating recess 1.
4 and the clamping screw is tightened to firmly grip the cutting tip 16 in its operating position on the end 12 of the boring bar 11. When the blade of the square cutting tip 16, that is, the cutting corner 45 wears out, loosen the tightening screw and
The square cutting tip 16 is removed, rotated, and then placed back into the seating recess 14 to provide a new cutting corner for the boring operation. When replacing the square cutting tip 16 with an equilateral triangular cutting terra f17, loosen the tightening screw again and remove the square cutting tip 16. Next, insert the equilateral triangular cutting tip 17 as shown in FIG.
Therefore, one edge of the equilateral triangular cutting tip 17 engages with the side wall 29 of the boring bar 11 closer to the hollow seating surface 32;
Adjacent inner edges of the equilateral triangular cutting tip 17 are tightened by the first diagonal retaining surface 28 of the block 21 and the recessed seating surface 3.
2 , these two retaining zones 25 , 28 are separated by an insertion part of the seating recess 14 , which insert part has an equilateral triangular cutting tip 17 . Although it does not function when the cutting tip 16 is seated in the seating recess 14, it functions to securely position the rectangular cutting tip 16.

Thus, the preferred embodiment of the mounting apparatus for cutting tips according to the invention as shown in FIGS.
1 or clamping is found to provide a simple and effective structure that can be used to mount cutting tips 15 of different shapes without the need to change or replace the block 21. Many variations in the structure and configuration of the parts are possible, and Figures 7-9 illustrate three such variations.

For example, number 7 uses the same reference numbers for the same features as in the previous figure.
Referring to the illustrated embodiment, the engagement zone 25 of the seating recess 14
, 26, 27a, 28a, 29 are formed in the peripheral portion of the recessed seating surface 32. Engagement zone 25, 26.27a+2
The seating recess 14 defined by 8a, 29 and the bottom surface of the recessed seating surface 32 is shaped to receive at least two different cutting tip configurations, such that at least two retention zones are provided for each of the cutting tip configurations. engage with. In the embodiment of FIG. 7, the recessed seating surface 32 can accommodate square and equilateral triangular cutting tips. As generally discussed with respect to FIGS. 1-6, the recessed seating surface 32 is configured to create two opposing parallel side walls 26, 29 and an outwardly facing wall 25. . However, at the inner end of the recessed seating surface 320, end walls 27a and 28a are formed at an angle to each other.
One right-angled end wall 27a makes a right angle with the far side wall 26 of the recessed seating surface 32, and the other oblique end wall 28a makes an angle of 600 with the near side wall 29, and the right-angled end wall 27a and oblique end wall surface 28a intersect at approximately the center between opposing parallel side walls 26 and 29. Boring rod 11
In this configuration, the fastener consists of a plate (not shown) configured to be located on the upper surface 40 of the end 12 of the boring bar 11, and has a seating surface 32 cut into the upper surface. is formed, and a tightening screw (not shown) is configured to pass through the hole 42 of the boring bar 11 from the top surface 40. With this configuration of the boring bar 11, it is also possible to use a conventional thread or an eccentric thread that passes directly through the boring bar 11 through an appropriately configured cutting tip.

In the embodiment of FIG. g, a boring bar 11 is shown having a recessed seating surface 32 at its outer end. The recessed seating surface 32 is configured to receive round and/or square shaped cutting tips. In this particular case, the retention zone 50.51 for a round cutting tip is generally arcuate, and the entire seating recess has a combined square and triangular circumferential shape. That is, the arcuate engagement zones 50, 51 for positioning the round cutting tip are replaced by mutually perpendicular retaining zones 52.
．． 53, 54 into the insertion part, the latter zone can be used to securely position a square or rectangular cutting tip.

As can be seen from FIGS. 7 and g, square or equilateral triangular formations can be provided with cutting tips having shapes other than circular in accordance with the principles of the present invention.

Showing further possible variants of the device according to the invention, the ninth
As illustrated, the clamping tool 20 has an outer end of a boring bar (not shown) and a seat for receiving a cutting tip having a configuration selected from at least two different cutting tip configurations. It is preferable that the recess 14 is formed together with the recess 14 for use.

The seating recess 14Vi has a positioning portion for the shape of each cutting tip, and the positioning portion has a locking band for locking with the respective cutting tip so as to securely position each chip within the recess 14. 25b.

26b, 27b, 28b, and 29b. 9th
In the illustrated embodiment, engagement zones 25b-29b are formed on clamping device 20. In particular, the clamping block 21 of Figure 2 is preferably configured to fit relatively snugly within a recessed seating surface formed generally in the outer end of the boring bar. The tightening block 21 has a lower surface 30 in which a recess is formed at 55 to face the recessed seating surface of the boring bar in spaced relation; engagement zones 25b-29b. The feature of the operation of the tightening block 21 in FIG. 9 will be readily understood if it is pointed out that the recess 55 is a mirror image of the recessed seating surface 32 made in the end of the boring bar 11 in FIG. It can be understood. Thus, the equilateral triangular cutting tip has a peripheral portion of the cutting tip that forms the engagement zone 25b.
, 28b.

29b, positioning can be ensured.

Similarly, a square or rectangular cutting tip has an engagement zone 26b, 27b at the edges around the tip.

Positioning can be performed while engaged with 29b.

It will be appreciated that the present invention provides a mounting device for cutting tips for boring bars or other tool holding devices for operations such as metal turning. The cutting tip type can be easily replaced by the installation device. The boring bar or tool holder may be of common or conventional construction in one possible embodiment (Fig. The attachment specifically made in the form of a block may be constituted by a member.

Finally, it is understood that various variations, modifications and/or additions may be made to the structure and arrangement of parts as described herein without departing from the scope of the invention as defined in the appended claims. I understand.

[Brief explanation of the drawing]

1 and 2 are respectively a plan view and a side view of a boring bar that can be used in an apparatus according to the invention. Figures 3 and 3 are top and side views, respectively, of a clamping block that can be used with the boring bar of Figures 7 and 2. 5 and 6 show how the square or rectangular and equilateral triangular cutting tips can be installed in the assembly with the boring bar and clamping block according to FIGS. 1 to 6. is shown with a broken line. FIG. 7 shows the construction of a first variant of a boring bar for mounting a square or equilateral triangular cutting tip. FIG. g shows the construction of a first variant of a boring bar for mounting square or equilateral triangular and round cutting tips. FIG. 9 is a perspective view of the underside of the block, which has a concave lower surface, and the clamping that can be used with the boring bar of FIGS. 1 and 2; 10...Body member, 11...
...Boring bar, 12...Outer end, 1
3...Inner end, 14...
Seating recess, 15.16.17... Cutting tip, 20... Tightening tool, 21.
・・・・・・Tighten with block, 25.25b+26
．． 27a, 27b, 28a, 28b. 29.29b, 50, 51, 52, 53.54...
...Engagement zone (or locking surface), 30...
...Concave lower surface, 31...Shoulder part,
32...Kuhomi seating surface

Claims (1)

[Claims] 1. A tool holding device comprising a main body member having an end portion for attaching a cutting tip, and a tightening tool for removably attaching the cutting tip to the end portion, wherein the main body member and The clamp is configured between the tool and includes a seating recess for receiving a cutting tip having a configuration selected from at least two different cutting tip configurations, the seating recess having a seating recess for each of said tip configurations. locating portions, each locating portion comprising at least one engagement zone for engaging a respective cutting tip to securely position the cutting tip within the seating recess. Tool holding device. 2. A tool holding device including a main body having an end for attaching a cutting tip, comprising a seating recess at least partially constituted by the end, and the four seating parts are configured to hold at least one different cutting tip. the seating recess having a locating portion for each of the tip features, each locating portion locating each cutting tip in the seating recess; at least two engagement zones for engaging each tip to securely position it within the body, at least seven engagement zones for each tip feature being defined by the body member; A tool holding device characterized in that a clamp operable to secure the cutting tip received within the seating recess is adapted to be assembled with a tool. 3. In a tool holding device having a clamping tool adapted to clamp a cutting tip to a body member having an end portion for receiving the cutting tip, the clamping tool together with the body member has at least a configured to form a seating recess for receiving a cutting tip having a feature selected from different cutting tip features, the seating recess having a locating portion for each of the tip features; , each locating portion comprising at least one engagement zone for engaging each cutting tip to securely position each cutting tip within the seating recess, and at least seven retaining zones for each tip feature. A tool holding device characterized in that the band is formed by a tool. 4° seating recess is shaped to form a plurality of said engagement zones, seven tips of said features being capable of engaging each unique combination of engagement zones. The tool holding device according to any one of Items 1 to 3. 5. The fastening tool includes a fastening block, the fastening block can be fixed to the main body member so as to constitute four parts for seating together with the main body member, and the fastening block has an engagement zone. a lower surface stepped to create a shoulder forming at least one of the engagement zones, the remaining engagement zone not being formed by the shoulder but by the body member; A tool holding device according to scope d. 6. Preferably, the body member has a recessed seating surface configured to receive the cutting tip and the clamp also receives the block, and the recessed seating surface of the body member has sidewalls, and these sidewalls are connected to the remaining constitutes a coherent band, and in this structure,
When the tightening block and main body members are assembled together, the wall of the recessed seating surface and the shoulder of the tightening block are together,
Tool holding device according to claim S, characterized in that it forms a retaining zone for a cutting bit. 7. The seating recess is shaped to form a plurality of said engagement zones, seven tips of said features being capable of engaging each unique combination of said engagement zones, and said body member disposing said tips. Claim 1 or 2, characterized in that the body member is configured to accommodate a person, and the engagement zone of the seating recess is defined by the peripheral portion of the recessed seating surface.
The tool holding device according to any 7 of the items. 8. The seating quadrant is shaped to form a plurality of said engagement zones, seven tips of said features are capable of engaging each unique combination of said engagement zones, and the body member is configured to form a plurality of said cutting tips. the fastener block is configured to fit relatively snugly within the recess seating surface, and the fastener block is configured to have four spaced apart parts facing the recess seating surface. 2. A tool holding device as claimed in claim 1, characterized in that the concave lower surface of the clamping block is shaped to form a plurality of engagement zones.