CN111975056A

CN111975056A - Reverse countersinking tool

Info

Publication number: CN111975056A
Application number: CN202010892122.1A
Authority: CN
Inventors: 岳岁宁; 苏建民
Original assignee: Kocel Intelligent Machinery Ltd
Current assignee: Kocel Intelligent Machinery Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-11-24

Abstract

The invention relates to a reverse countersinking tool which comprises a tool bar (100), a fixing bolt (200) and a plurality of blades (300) with different sizes, wherein a mounting hole (110) is formed in the side wall of the first end of the tool bar (100), a threaded hole (120) communicated with the mounting hole (110) is formed in the end part of the first end, the blades (300) are arranged in the mounting hole (110) in a switchable manner, a machining section of the blade (300) is exposed out of the mounting hole (110), the fixing bolt (200) is in threaded fit with the threaded hole (120), and the fixing bolt (200) can abut against the blades (300). The scheme can solve the problems that the manufacturing cost of the existing counter-boring cutter is high, and the machining size is difficult to guarantee.

Description

Reverse countersinking tool

Technical Field

The invention relates to the technical field of machining, in particular to a reverse countersinking tool.

Background

At present, in large-scale lathe base, box part, the designer when designing the shirt rim fixed orifices, in order to let the fastener not to interfere with other spare parts, the contact surface of guaranteeing the fastener again is level and smooth to need counter-boring in this through-hole, in the application, adopt anti-counter-boring cutter to carry out the counter-boring, because the via hole diameter type of anti-counter-boring is more, thereby cause the processing of a part to need the counter-boring cutter of many specifications.

However, the structure of installing the countersink on the cutter bar is complex, so that the difficulty in manufacturing the cutter bar is high, cost control is not facilitated, and moreover, after the countersink is replaced for many times, the assembly precision between the countersink and the cutter bar is easily influenced, and the machining size cannot be guaranteed.

Disclosure of Invention

Therefore, the embodiment of the invention provides a reverse countersinking tool, which aims to solve the problems that the conventional reverse countersinking tool is high in manufacturing cost and difficult to ensure machining size.

In order to solve the problems, the invention adopts the following technical scheme:

the utility model provides an anti-countersink cutter, includes cutter arbor, fixing bolt and a plurality of not unidimensional blade, the mounting hole has been seted up to the lateral wall of the first end of cutter arbor, just the tip of first end seted up with the screw hole of mounting hole intercommunication, it is a plurality of the blade switchably set up in the mounting hole, just the processing section of blade expose in the mounting hole, fixing bolt with screw hole screw-thread fit, just but fixing bolt butt in the blade.

In one embodiment, a positioning groove is formed in one side of the blade, which faces away from the fixing bolt, and the positioning groove can be in limit fit with the cutter bar.

In one embodiment, the machining section comprises a first protruding section and a second protruding section, and the first protruding section and the second protruding section are symmetrically arranged relative to a central axis of the cutter bar.

In one embodiment, a positioning protrusion is arranged on one side of the cutter bar facing the mounting hole, and the positioning groove is in limit fit with the positioning protrusion.

In one embodiment, the reverse countersinking tool further comprises a washer, the washer is sleeved on the fixing bolt, and the washer is located between a nut of the fixing bolt and the end of the first end.

In one embodiment, the reverse countersinking tool further comprises a tool holder, a connecting hole is formed in one end of the tool holder, and the second end of the tool bar is detachably arranged in the connecting hole.

In one embodiment, the reverse countersinking tool further comprises a fastening piece, a side fixing hole communicated with the connecting hole is formed in the side wall of the tool holder, the fastening piece is in threaded connection with the side fixing hole, and the fastening piece can abut against the second end of the tool bar.

In one embodiment, the fastener is a headless screw that is flush with a side wall of the holder with the second end of the tool shank mounted to the attachment bore.

In one embodiment, the machining section has a cutting edge, and the cutting edge is provided with a chip breaker.

In one embodiment, the end of the processing section is an inclined surface, and the included angle between the inclined surface and the cutting edge of the processing section is less than 90 degrees.

The technical scheme adopted by the invention can achieve the following beneficial effects:

in the reverse countersinking tool disclosed by the embodiment of the invention, the blades with different sizes are switchably arranged on the cutter bar, so that the reverse countersinking tool is assembled. Compared with the counter-boring cutter in the prior counter-boring cutter, the embodiment of the invention has the advantages that the structure of the blade is simple, the manufacture is convenient, and the corresponding blade is manufactured according to the diameter of the counter-boring, so that the manufacture period and the manufacture cost can be reduced. Meanwhile, the blade is easier to assemble on the cutter bar, the assembly efficiency is improved, and meanwhile, the assembly precision between the blade and the cutter bar can be improved, so that the machining size is ensured.

Drawings

FIG. 1 is a schematic structural diagram of a reverse countersinking tool disclosed in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a reverse countersinking tool disclosed in an embodiment of the present invention.

Description of reference numerals:

100-cutter bar, 110-mounting hole, 120-threaded hole and 130-positioning projection;

200-fixing bolts;

300-blade, 310-positioning groove, 320-first projecting section, 330-second projecting section, 340-cutting edge and 350-inclined surface;

400-a cutter holder, 410-a connecting hole and 420-a side fixing hole;

500-fastener.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "top," "bottom," "top," and the like are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 2, an embodiment of the present invention discloses a reverse spot facing tool, which includes a tool holder 100, a fixing bolt 200, and a plurality of differently sized inserts 300.

The side wall of the first end of the tool bar 100 is provided with a mounting hole 110, the mounting hole 110 can provide a mounting position for the insert 300, and specifically, the plurality of inserts 300 can be switchably arranged in the mounting hole 110, in this case, a worker can select the size of the insert 300 matched with the size of the spot facing according to the size of the spot facing to be processed. Also, the machining section of the insert 300 is exposed to the mounting hole 110 to facilitate the machining of the spot facing.

In the embodiment of the present invention, the end of the first end of the tool bar 100 is provided with a threaded hole 120 communicated with the mounting hole 110, the fixing bolt 200 is in threaded fit with the threaded hole 120, and in a specific mounting process, the threaded end of the fixing bolt 200 can be in threaded connection with the threaded hole 120 and can pass through the threaded hole 120, so that the fixing bolt 200 can abut against the blade 300, thereby fixing the blade 300. This may facilitate a detachable connection to the blade 300, thereby making replacement of the blade 300 easier.

As can be seen from the above, in the reverse countersink tool disclosed in the embodiment of the present invention, the inserts 300 having different sizes are switchably mounted on the tool holder 100 to implement the assembly of the reverse countersink tool. Compared with the counter-boring cutter in the prior counter-boring cutter, the embodiment of the invention has the advantages that the structure of the blade 300 is simple, the manufacture is convenient, and the corresponding blade 300 only needs to be manufactured according to the diameter of the counter-boring, so that the manufacturing period and the manufacturing cost can be reduced. Meanwhile, the insert 300 is more easily assembled to the cutter bar 100, and the assembly efficiency is improved while the assembly precision between the insert 300 and the cutter bar 100 is improved to ensure the machining size.

Further, a positioning groove 310 may be formed on a side of the blade 300 away from the fixing bolt 200, and the positioning groove 310 may be in limit fit with the cutter bar 100. In a specific installation process, the positioning groove 310 can improve the installation stability of the blade 300, so that the machining section of the blade 300 can be maintained at the original protruding length, the machining size can be ensured, and the machining precision of the spot facing is higher.

In an alternative embodiment, the machining section may include a first protruding section 320 and a second protruding section 330, the first protruding section 320 and the second protruding section 330 may protrude from two ports of the mounting hole 110, respectively, and during a specific machining process, the first protruding section 320 and the second protruding section 330 may improve the efficiency of spot facing machining, so that the spot facing may be easily machined. Further, the first protruding section 320 and the second protruding section 330 can be symmetrically arranged relative to the central axis of the cutter bar 100, so that the processing precision of the spot facing can be improved, the processing quality of the spot facing can be ensured, and meanwhile, the processing uniformity of the spot facing of the counter-spot facing cutter can be improved.

In the embodiment of the disclosure, one side of the tool bar 100 facing the mounting hole 110 may be provided with a positioning protrusion 130, please refer to fig. 2 again, the positioning groove 310 may be in limit fit with the positioning protrusion 130. In this case, the positioning protrusion 130 not only can position the insert 300 in the longitudinal direction of the insert 300, but also the positioning protrusion 130 can position the insert 300 in the width direction of the insert 300 to prevent the insert 300 from being displaced laterally or longitudinally, so that the mounting stability of the insert 300 can be improved better, and the quality of spot facing can be ensured.

The reverse countersinking tool disclosed by the embodiment of the invention further comprises a gasket, the gasket can be sleeved on the fixing bolt 200, and the gasket can be positioned between the nut of the fixing bolt 200 and the end part of the first end. In this case, the spacer can ensure the installation stability of the fixing bolt 200 to prevent the fixing bolt 200 from being loosened, so that the fixing bolt 200 can better fix the blade 300, and the installation stability of the blade 300 can be improved. Further, the number of the spacers may be plural, and the plural spacers can better prevent the fixing bolt 200 from being loosened, so that the mounting stability of the blade 300 is better.

The reverse countersinking tool disclosed by the embodiment of the invention further comprises a tool holder 400, wherein the tool holder 400 enables the reverse countersinking tool to be installed on a machine tool, specifically, one end of the tool holder 400 can be provided with a connecting hole 410, and the second end of the tool bar 100 is detachably arranged in the connecting hole 410, so that the connection between the tool bar 100 and the tool holder 400 is realized.

Of course, there are various ways in which the second end of the tool bar 100 is detachably disposed in the connecting hole 410, and optionally, the reverse countersink tool disclosed in the embodiment of the present invention may further include a fastening member 500, the sidewall of the tool holder 400 may be provided with a side fixing hole 420 communicating with the connecting hole 410, the fastening member 500 may be in threaded connection with the side fixing hole 420, and the fastening member 500 may abut against the second end of the tool bar 100. In this case, the tool bar 100 is fixed by the fastener 500 to improve the installation stability between the tool bar 100 and the tool holder 400. Further, in order to better improve the installation stability between the tool bar 100 and the tool holder 400, the number of the fasteners 500 may be multiple, the side wall of the tool holder 400 may be provided with a plurality of side fixing holes 420 distributed at intervals and communicated with the connecting hole 410, the fasteners 500 may be in threaded connection with the corresponding side fixing holes 420, and the plurality of fasteners 500 may provide a larger abutting force to the tool bar 100, so that the installation stability between the tool bar 100 and the tool holder 400 is better.

In an alternative embodiment, the fastener 500 may be a headless screw that may be flush with the sidewall of the tool holder 400 with the second end of the tool holder 100 mounted to the coupling bore 410. Compared with the fastening piece 500 with other structures, the headless screw can not only improve the appearance effect of the counter-countersink cutter, but also prevent the protruding fastening piece 500 from influencing the processing effect of the counter-countersink cutter.

Further, the machining section may have a cutting edge 340, and the cutting edge 340 may be provided with a chip breaker. The chip breaker groove not only plays an additional deformation role for chips, but also can control the curling and breaking of the chips, so that the machining effect of the counter-countersink tool is better.

Accordingly, the end of the machining section may be a beveled surface 350, and referring again to fig. 2, the beveled surface 350 may be angled less than 90 degrees from the cutting edge 340 of the machining section. This prevents the non-machined surface at the end of the insert 300 from affecting the cutting efficiency of the insert 300, and thus can improve the machining rate of the countersink by the reverse countersink tool.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a reverse countersink cutter, characterized in that, includes cutter arbor (100), fixing bolt (200) and a plurality of not unidimensional blade (300), mounting hole (110) have been seted up to the lateral wall of the first end of cutter arbor (100), just the tip of first end seted up with screw hole (120) of mounting hole (110) intercommunication, it is a plurality of blade (300) switchably set up in mounting hole (110), the processing section of blade (300) expose in mounting hole (110), fixing bolt (200) with screw hole (120) screw-thread fit, just fixing bolt (200) can butt in blade (300).

2. The counterboring tool according to claim 1, wherein a positioning groove (310) is formed in a side of the insert (300) facing away from the fixing bolt (200), and the positioning groove (310) can be in limit fit with the tool holder (100).

3. The counter countersink tool according to claim 2, wherein said machining segment comprises a first protruding segment (320) and a second protruding segment (330), said first protruding segment (320) and said second protruding segment (330) being symmetrically arranged with respect to a central axis of said tool shank (100).

4. The counter countersink tool according to claim 2, wherein a positioning protrusion (130) is provided on a side of the tool bar (100) facing the mounting hole (110), and the positioning groove (310) is in limit fit with the positioning protrusion (130).

5. The anti-countersinking tool according to claim 1, further comprising a washer, wherein the washer is sleeved on the fixing bolt (200), and the washer is located between a nut of the fixing bolt (200) and an end of the first end.

6. The reverse spot facing cutter according to claim 1, further comprising a cutter holder (400), wherein one end of the cutter holder (400) is provided with a connecting hole (410), and a second end of the cutter bar (100) is detachably arranged in the connecting hole (410).

7. The reverse countersinking tool according to claim 6, further comprising a fastening member (500), wherein a side wall of the tool holder (400) is provided with a side fixing hole (420) communicated with the connecting hole (410), the fastening member (500) is in threaded connection with the side fixing hole (420), and the fastening member (500) can abut against the second end of the tool bar (100).

8. The counter-countersinking tool according to claim 7, wherein said fastener (500) is a headless screw which is flush with a side wall of said seat (400) in a state where the second end of said shank (100) is mounted to said connecting hole (410).

9. The reverse countersinking tool according to claim 1, wherein said cutting segment has a cutting edge (340), said cutting edge (340) having a chip breaker defined thereon.

10. The reverse countersink tool according to claim 1, wherein the end of said machining section is a beveled surface (350), and the included angle between said beveled surface (350) and the cutting edge (340) of said machining section is less than 90 degrees.