CN218224819U

CN218224819U - Chip breaking knife

Info

Publication number: CN218224819U
Application number: CN202222329065.3U
Authority: CN
Inventors: 陈胜琳; 陈晓忠; 王远; 邱伟杰; 李林
Original assignee: Shanghai Zuoren Precision Cutting Tool Co ltd
Current assignee: Shanghai Zuoren Precision Cutting Tool Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2023-01-06
Anticipated expiration: 2032-09-01

Abstract

The utility model discloses a chip breaking knife, which comprises a knife body and a knife handle, wherein the top end of the knife body is spliced with the inner side of the bottom of the knife handle and is fixed through a positioning pin, and the top of the knife handle is fixedly connected with a mounting joint; when milling, through the micropump with coolant liquid incasement cooling fluid suction circulation chamber, realize the heat dissipation to the cutter arbor through spiral circulation, and because the shape in circulation chamber is identical with cutter arbor screw degree, and then can keep longer cycle length, make the inside heat of cutter arbor fully absorbed by the coolant liquid that the circulation intracavity passes through, when milling the degree of depth great, make the coolant liquid case on its top take the vibration of first conducting strip to press the second conducting strip through the vibration of cutter arbor, make the second conducting strip constantly swing, and because the second shaft lever is comparatively close to first axostylus axostyle, make the amplitude of oscillation of second conducting strip increase, and the swing amplitude is big more far away from first axostylus axostyle, and then the contact of increase second conducting strip and air, make the heat fully disperse to the outside air.

Description

Chip breaking cutter

Technical Field

The utility model belongs to the technical field of milling process is relevant, concretely relates to chip breaking sword.

Background

When the chip breaking cutter is used for milling, the cutter bar is vibrated due to high-speed rotation, so that the cutter bar is easy to break, and the use cost is increased; in addition, a large amount of heat is easily generated on the surface of the cutter, the cutter is damaged due to high temperature, the service life of the cutter is shortened, and waste chips generated in the milling process cannot be cleaned, so that the waste chips are accumulated on the surfaces of the cutter head and a workpiece, and the cutter head and the workpiece are damaged.

Application number CN202122628554.4 discloses a chip breaker, which comprises a cutter sleeve, a cutter bar and a cutter head. This chip breaking sword is through setting up antidetonation chamber in the both sides of mounting groove, utilizes the inside blotter that sets up of its inside to cushion the resonance that cutter arbor and broach shell inside took place, has avoided milling cutter and lathe to produce very big deformation and dynamic stress because resonance leads to inner structure to play certain guard action to the cutter.

The existing chip breaking cutter technology has the following problems: the chip breaking cutter only has the advantages that the heat dissipation holes are formed in the cutter head part to assist in heat dissipation during milling, and due to heat transferability, heat in the cutter can be dispersed to other parts of the cutter rod through the cutter head part, so that the overall strength of the chip breaking cutter can be reduced, and the chip breaking cutter still has strong damage to the cutter.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a chip breaking knife to solve the not enough problem of thermal diffusivity of the louvre that proposes among the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a chip breaking knife, includes cutter body and handle of a knife, the top of cutter body is pegged graft and is fixed with the bottom inboard of handle of a knife and through the locating pin, the top fixedly connected with attach fitting of handle of a knife, the inside of handle of a knife is provided with and is used for carrying out the radiating cooling module of water-cooling circulation to the cutter body, the movable notch that a plurality of crosses distribute is seted up in the outside of handle of a knife, be provided with the swing subassembly in the movable notch, the swing subassembly helps the heat dissipation of cooling subassembly to the cutter body through increasing the swing range at cutter body milling process.

Preferably, the cutter body comprises a cutter bar, the lower end part of the cutter bar is spiral, a chip groove is formed in the circumferential surface of the spiral, and a chip breaker is formed at the bottom of the cutter bar.

Preferably, the inner side of the cutter bar is provided with a circulating cavity matched with the spiral degree of the cutter bar.

Preferably, the cooling assembly comprises a cooling liquid tank, the cooling liquid tank is fixed to the top end of the cutter bar, a micro pump is fixedly installed on the inner side of the cooling liquid tank, one port of the circulation cavity is communicated with the micro pump, and the other port of the circulation cavity is communicated with the cooling liquid tank.

Preferably, the swing assembly comprises a first heat conducting strip and a second heat conducting strip, the first heat conducting strip is attached to the outer surface of the cooling liquid tank, the top end of the first heat conducting strip is hinged to one end of the second heat conducting strip through a first shaft rod, a second shaft rod is fixedly connected to one end, close to the first heat conducting strip, of the first heat conducting strip, limiting sliding grooves are symmetrically formed in the inner walls of the two sides of the movable notch, and the second heat conducting strip is limited in the limiting sliding grooves of the movable notch through the second shaft rod.

Preferably, an elastic pad is fixedly arranged in the limiting sliding groove, and the second shaft lever abuts against the top of the elastic pad.

Compared with the prior chip breaking knife technology, the utility model provides a chip breaking knife possesses following beneficial effect:

1. the utility model pumps the cooling liquid in the cooling liquid tank into the circulating cavity through the micropump during milling, realizes the heat dissipation of the cutter bar through spiral circulation, and can keep longer circulating length due to the shape of the circulating cavity is matched with the spiral degree of the cutter bar, so that the heat in the cutter bar can be fully absorbed by the cooling liquid passing through the circulating cavity;

2. the utility model discloses when milling the great time of the degree of depth, make the coolant liquid case on its top take the vibration of first conducting strip to press down the second conducting strip through the vibration of cutter arbor for the second conducting strip constantly swings, and because the second shaft lever is comparatively close to first axostylus axostyle, makes the amplitude of oscillation of second conducting strip increase, and the amplitude of oscillation is bigger more far away from first axostylus axostyle, and then increases the contact of second conducting strip and air, makes the heat fully disperse to the outside air.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, do not constitute a limitation of the invention, in which:

fig. 1 is a schematic perspective view of a chip breaker according to the present invention;

fig. 2 is a front view structural schematic diagram of the chip breaking knife provided by the present invention;

FIG. 3 is a schematic view of a cross-sectional structure of a chip breaker according to the present invention;

fig. 4 is an enlarged schematic structural view of a point a in fig. 3 according to the present invention;

in the figure: 1. a cutter body; 11. a cutter bar; 12. a chip groove; 13. a chip breaker groove; 14. a circulation chamber; 2. a knife handle; 3. installing a connector; 4. a swing assembly; 41. a first thermally conductive sheet; 42. a second heat-conducting fin; 43. a first shaft lever; 44. a second shaft lever; 5. positioning pins; 6. a movable notch; 7. a cooling assembly; 71. a coolant tank; 72. a micro-pump; 8. a limiting chute; 9. an elastic pad.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a chip breaking cutter, including cutter body 1 and handle of a knife 2, the top of cutter body 1 is pegged graft and is fixed with the bottom inboard of handle of a knife 2 and through locating pin 5, cutter body 1 includes cutter arbor 11, the lower extreme portion of cutter arbor 11 is the heliciform, and seted up chip groove 12 on the periphery along the spiral, a metal fillings strip for arrange the guide cutting when milling, chip breaker 13 has been seted up to the bottom of cutter arbor 11, a metal fillings strip is used for cutting off, prevent and remain on the workpiece surface, the circulation chamber 14 that coincide with the 11 spiral degrees of cutter arbor is seted up to the inboard of cutter arbor 11, keep longer circulation length, make the inside heat of cutter arbor 11 fully absorbed by the coolant liquid of process in the circulation chamber 14, the top fixedly connected with attach fitting 3 of handle of a knife 2, a knife for install on milling equipment.

In order to prevent the cutter bar 11 from deforming due to overheating, a cooling assembly 7 for performing water-cooling circulation heat dissipation on the cutter body 1 is arranged inside the cutter handle 2, the cooling assembly 7 comprises a cooling liquid tank 71, the cooling liquid tank 71 is fixed at the top end of the cutter bar 11, a micro pump 72 is fixedly installed on the inner side of the cooling liquid tank 71, one port of the circulation cavity 14 is communicated with the micro pump 72, the other port of the circulation cavity is communicated with the cooling liquid tank 71, circulating cooling liquid is filled in the cooling liquid tank 71, heat dissipation circulation is achieved under the working of the micro pump 72, and therefore the cutter bar 11 is sufficiently dissipated heat.

In order to further improve the heat dissipation effect, a plurality of movable notches 6 distributed in a cross shape are formed in the outer side of the tool holder 2, a swing assembly 4 is arranged in each movable notch 6, the swing assembly 4 helps the cooling assembly 7 to dissipate heat of the tool body 1 by increasing the swing amplitude in the milling process of the tool body 1, each swing assembly 4 comprises a first heat conducting fin 41 and a second heat conducting fin 42, each first heat conducting fin 41 is attached to the outer surface of the corresponding cooling liquid tank 71 (the first heat conducting fin 41 is attached to the outer surface of the corresponding cooling liquid tank 71 through glue), the top end of each first heat conducting fin 41 is hinged to one end of each second heat conducting fin 42 through a first shaft rod 43, one end, close to the first heat conducting fin 41, of each first heat conducting fin 41 is fixedly connected with a second shaft rod 44, limiting sliding grooves 8 are symmetrically formed in the inner walls of two sides of each movable notch 6, and the second heat conducting fins 42 are limited to the limiting sliding grooves 8 of the movable notches 6 through the second shaft rods 44.

What need remind is, spacing spout 8 internal fixation is provided with cushion 9, second axle lever 44 supports the top at cushion 9, elasticity through cushion 9 can make first conducting strip 41 and second conducting strip 42 keep the state shown in the picture, first conducting strip 41 laminating can absorb coolant liquid case 71 surface heat at the surface of coolant liquid case 71 promptly, and second conducting strip 42 is the form of opening, can disperse the heat that first conducting strip 41 transmitted to the outside air in, and then dispel the heat to coolant liquid case 71 and cool down.

The utility model discloses a theory of operation and use flow: when the tool is used, the tool bar 11 is close to a workpiece during milling, waste chips generated during milling can be cut off through the chip breaker groove 13, the chip breaker groove 12 is used for cleaning, the phenomenon that the waste chips are accumulated on the surface of the workpiece to influence the rough milling precision is avoided, cooling liquid in the cooling liquid tank 71 is pumped into the circulating cavity 14 through the micro pump 72 during milling, and heat dissipation of the tool bar 11 is achieved through spiral circulation;

in the milling process, when the milling depth is small, the first heat conducting strip 41 and the second heat conducting strip 42 can be kept in the state shown in fig. 1-4 through the elastic force of the elastic pad 9, that is, the first heat conducting strip 41 is attached to the outer surface of the coolant tank 71 to absorb the heat on the surface of the coolant tank 71, and the second heat conducting strip 42 is in an open state, so that the heat transferred by the first heat conducting strip 41 can be dissipated into the outside air, and then the coolant tank 71 can be cooled, and when the milling depth is large, the coolant tank 71 at the top end of the coolant tank drives the first heat conducting strip 41 to vibrate and press the second heat conducting strip 42 due to the vibration of the cutter bar 11, so that the second heat conducting strip 42 continuously swings, and the swing amplitude of the second heat conducting strip 42 is increased (the swing amplitude is increased farther away from the first shaft bar 43 because the second shaft bar 44 is closer to the first shaft bar 43), and then the contact between the second heat conducting strip 42 and the air is increased, so that the heat is fully dissipated to the outside air.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a chip-breaking knife, includes cutter body (1) and handle of a knife (2), its characterized in that: the top of cutter body (1) is pegged graft and is fixed with the bottom inboard of handle of a knife (2) and through locating pin (5), the top fixedly connected with attach fitting (3) of handle of a knife (2), the inside of handle of a knife (2) is provided with and is used for carrying out water-cooling circulation radiating cooling module (7) to cutter body (1), movable notch (6) that a plurality of crosses distribute are seted up in the outside of handle of a knife (2), be provided with swing subassembly (4) in movable notch (6), swing subassembly (4) mill the in-process at cutter body (1) and help cooling module (7) to the heat dissipation of cutter body (1) through increasing the swing range.

2. A chip breaker according to claim 1 wherein: the cutter body (1) comprises a cutter bar (11), the lower end part of the cutter bar (11) is spiral, a chip groove (12) is formed in the circumferential surface of the spiral, and a chip breaker groove (13) is formed in the bottom of the cutter bar (11).

3. A chip-breaker knife according to claim 2, characterized in that: the inner side of the cutter bar (11) is provided with a circulating cavity (14) which is matched with the cutter bar (11) in a spiral degree.

4. A chip-breaker knife according to claim 3, characterized in that: the cooling assembly (7) comprises a cooling liquid tank (71), the cooling liquid tank (71) is fixed to the top end of the cutter bar (11), a micro pump (72) is fixedly mounted on the inner side of the cooling liquid tank (71), one port of the circulating cavity (14) is communicated with the micro pump (72), and the other port of the circulating cavity is communicated with the cooling liquid tank (71).

5. A chip-breaker knife according to claim 4, characterized in that: the swing assembly (4) comprises a first heat-conducting strip (41) and a second heat-conducting strip (42), the first heat-conducting strip (41) is attached to the outer surface of the cooling liquid tank (71), the top end of the first heat-conducting strip (41) is hinged to one end of the second heat-conducting strip (42) through a first shaft rod (43), one end, close to the first heat-conducting strip (41), of the first heat-conducting strip (41) is fixedly connected with a second shaft rod (44), limiting sliding grooves (8) are symmetrically formed in the inner walls of the two sides of the movable notch (6), and the second heat-conducting strip (42) is limited in the limiting sliding grooves (8) of the movable notch (6) through the second shaft rod (44).

6. A chip-breaker knife according to claim 5, characterized in that: an elastic pad (9) is fixedly arranged in the limiting sliding groove (8), and the second shaft lever (44) abuts against the top of the elastic pad (9).