CN208592870U - Cutter - Google Patents

Abstract

The utility model discloses a kind of cutters, including cutter hub, the cutter hub includes knife spine, and the cutter hub is equipped with blade part far from one end of the knife spine, the blade part is equipped with cutting edge far from one end of the knife spine, and the surface of the cutting edge is coated with one layer and coats the film layer to be formed by spark discharge.The cutter of the utility model can improve hardness and wearability.

Description

Cutter

Technical field

The utility model relates to tooling cost field more particularly to a kind of cutters.

Background technique

Cutter is tool indispensable in all trades and professions and people's life, as cutter, the process hides clothes of ripper are cut out It cuts with various cutters such as cutter, military cutter, Kitchen knife, table knife, fruit knives.The cutter supplied currently on the market is general Store-through is the problems such as edge hardness is not high, not wear-resisting.

In the prior art, in order to increase the hardness and wearability of cutter, pass through vapor deposition plating during tool sharpening The wear-resistant material of high rigidity is plated in formation film plating layer at blade by the method for film.But this method need to be set using vacuum coating Standby, the equipment investment is larger, causes the processing cost of cutter higher.It was being used in addition, this method is formed by film plating layer It is easy to wear away in journey, causes cutting-tool's used life shorter.

Utility model content

For this purpose, the utility model provides a kind of cutter, exist above to solve the problems, such as or at least alleviate.

One aspect according to the present utility model provides a kind of cutter, including cutter hub, and the cutter hub includes knife spine, institute It states cutter hub and is equipped with blade part far from one end of the knife spine, the blade part is equipped with cutting edge, and institute far from one end of the knife spine The surface for stating cutting edge is coated with one layer and coats the film layer to be formed by spark discharge.

Optionally, in cutter according to the present utility model, the first surface of the blade part is equipped with the cutting edge, and should The surface of cutting edge is coated with the film layer.

Optionally, in cutter according to the present utility model, the first surface of the blade part is equipped with the cutting edge, described The second surface of blade part is coated with the film layer in the back side of the cutting edge.

Optionally, in cutter according to the present utility model, the first surface and second surface of the blade part are equipped with The cutting edge, and the edge surface of the first surface or second surface is coated with the film layer.

Optionally, in cutter according to the present utility model, the first surface and/or second surface of the blade part are all provided with There is the cutting edge, and the edge surface of the first surface and second surface is coated with the film layer.

Optionally, in cutter according to the present utility model, the film layer extends to the entire blade part of covering.

Optionally, in cutter according to the present utility model, the cutter hub further includes connecting the blade part and knife spine Knife face, the film layer extend to the covering knife face.

Optionally, in cutter according to the present utility model, the film layer with a thickness of D, wherein 5um≤D≤40um.

Optionally, in cutter according to the present utility model, the width of the film layer is B, wherein 1mm≤B≤15mm.

Optionally, in cutter according to the present utility model, the film layer be 5Cr15MoV, 5Cr15Mo, 9Cr18MoV, One of titanium alloy or one of a variety of and WC, TiC, CrC, BN, TiNC, TiN, TiAlN, CrN, ZrN, ZrO or more The film layer that kind mixes.

Technical solution according to the present utility model, provides a kind of cutter, including blade part, and the edge of blade part can be with Single or double puts the first edge on a knife or a pair of scissors to form cutting edge, wherein coats to form film layer by spark discharge on the surface of cutting edge.Spark discharge The film layer for coating formation is thicker and at low cost, to keep the wearability of cutter stronger, service life is also more longlasting.

The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model Art means, and being implemented in accordance with the contents of the specification, and in order to allow above and other purpose, feature of the utility model It can be more clearly understood with advantage, it is special below to lift specific embodiment of the present utility model.

Detailed description of the invention

To the accomplishment of the foregoing and related purposes, certain illustrative sides are described herein in conjunction with following description and drawings Face, these aspects indicate the various modes that can practice principles disclosed herein, and all aspects and its equivalent aspect It is intended to fall in the range of theme claimed.Read following detailed description in conjunction with the accompanying drawings, the disclosure it is above-mentioned And other purposes, feature and advantage will be apparent.Throughout the disclosure, identical appended drawing reference generally refers to identical Component or element.

Fig. 1 shows the structural schematic diagram of the cutter according to the utility model one embodiment；

Fig. 2 shows the left side structure schematic diagrams of Fig. 1；

Fig. 3 shows enlarged structure schematic diagram of the cutter in Fig. 2 after single side puts the first edge on a knife or a pair of scissors at A；

Fig. 4 shows the cutter in Fig. 2 and puts the first edge on a knife or a pair of scissors in single side and form the enlarged structure schematic diagram after film layer at A；

Fig. 5 show the cutter in Fig. 2 it is two-sided put the first edge on a knife or a pair of scissors and single side form film layer after enlarged structure schematic diagram at A；

Fig. 6 shows the cutter in Fig. 2 and puts the first edge on a knife or a pair of scissors and enlarged structure schematic diagram after two-sided formation film layer at A two-sided.

Specific embodiment

Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure It is fully disclosed to those skilled in the art.

It should be pointed out that all 5Cr15MoV, 5Cr15Mo being related in the utility model, 9Cr18MoV, titanium alloy, WC, The materials such as TiC, CrC, BN, TiNC, TiN, TiAlN, CrN, ZrN, ZrO, 3Cr13 are the common material that can be bought in the market Material.

As it was noted above, more or less there is certain functional defect, therefore the utility model in cutter in the prior art Propose a kind of more optimized cutter of performance.Fig. 1 is shown to be shown according to the structure of the cutter 100 of the utility model one embodiment It is intended to, as shown in Figure 1, the cutter 100 includes cutter hub 110 and knife handle 150, cutter hub includes knife spine 111, wherein cutter hub 110 is separate One end of knife spine 111 is equipped with blade part 120, and one end edge far from knife spine 111 is put the first edge on a knife or a pair of scissors to form cutting edge 121 on blade part 120, Also, the surface of cutting edge 121 is coated with a tunic layer 130, which is by the electric spark on surface electric discharge in cutting edge 121 Coating is formed.It coats to form film layer by spark discharge, not only simple process, but also it is larger to be formed by 130 thickness of film layer, Wearability is stronger, whets a knife so as to the cutting edge 121 to cladding film layer 130, and the service life of cutter 100 is also more permanent.

It should be pointed out that cutter 100 shown in Fig. 1 is a kind of structure of Kitchen knife, but the utility model is not only restricted to This, the cutter 100 of the utility model can also be the cutter of ripper, process hides tailoring cutter, military cutter, kitchen It is merely exemplary in Fig. 1 to show a kind of Kitchen knife with the structure of the various common cutters such as knife, table knife, fruit knife Structure, other kinds of cutter structure is temporarily not shown, to the knot of cutter for being the cutter 100 shown in Fig. 1 below Structure and function are described.

It is that cutter blank, the material of cutter blank are made using punch forming first in the forming process of cutter 100 in the utility model Matter is stainless steel, and the shape of cutter blank is strip identical with the length of cutter 100, wherein the width range of cutter blank entirety is 18-40mm, " width " here are relative to the distance in 111 vertical direction of knife spine.After being processed to the cutter blank The cutter 100 including above-mentioned cutter hub 110 and knife handle 150 is made, thus the material of cutter hub 110 and knife handle 150 is also stainless steel.

It is well known that the blade part of cutter is the most important factor for determining the performance of cutter ability.According to one embodiment, such as Shown in Fig. 2 and Fig. 3, only the first surface of blade part 120 put the first edge on a knife or a pair of scissors to form cutting edge 121, and cutting edge 121 is located at blade part 120 one end far from knife spine 111.Then spark discharge is directly carried out on the surface of the cutting edge 121 of formation to coat to form film Layer 130, so that the cutting edge 121 of the first surface of blade part 120 is coated with film layer 130.As shown in figure 4, film layer 130 is completely covered 121 region of cutting edge, is also extend to other positions of the blade part 120 above cutting edge 121, so that film layer 130 be made to cover Cover the region of entire blade part 120.

According to another embodiment, as shown in figure 5, the first surface and second surface to blade part 120 are put the first edge on a knife or a pair of scissors Cutting edge 121 is formed, spark discharge coating processing is carried out on the surface of a wherein cutting edge 121 and forms film layer 130.Specifically exist The first surface of blade part 120 put the first edge on a knife or a pair of scissors to be formed cutting edge 121 and the cutting edge of the first surface 121 formed film layer 130 after, then The second surface of blade part 120 also carries out putting the first edge on a knife or a pair of scissors to form cutting edge 121, and the second surface of the blade part 120 is without electric spark Electro-arc depositing processing forms film layer 130.To, when whetting a knife in the later period, can cutting edge 121 to 120 second surface of blade part into Row polishing makes cutter have more permanent service life in this way, the film layer 130 on the cutting edge 121 of first surface will not be worn.

Here, it should be noted that be also possible to only put the first edge on a knife or a pair of scissors forming cutting edge on one of surface of blade part 120 121, spark discharge coating processing then, which is carried out, at the back side of another surface of blade part 120, namely cutting edge 121 is formed Film layer 130 in this way, not only technique is more simplified, but also makes cutting edge 121 and film layer 130 surface that blade part 120 is arranged in is different, So as to whet a knife to the surface where cutting edge 121, without wearing film layer 130, further extend the use of cutter 100 Service life.

According to another embodiment, as shown in fig. 6, put the first edge on a knife or a pair of scissors forming cutting edge 121 in the second surface to blade part 120 Afterwards, it also carries out spark discharge to the cutting edge of the second surface 121 to coat to form film layer 130, that is to say, that blade part 120 First surface and second surface carry out putting the first edge on a knife or a pair of scissors to form cutting edge 121, and 121 surface of cutting edge of first surface and second surface is equal It is coated with above-mentioned spark discharge and coats the film layer 130 to be formed.Similarly, 121 region of cutting edge is completely covered in film layer 130, may be used also To extend to the other positions for the blade part 120 for being located at 121 top of cutting edge, so that film layer 130 be made to cover entire blade part 120 Region.It should be noted that when first surface and second surface are coated with film layer 130 and carry out putting the first edge on a knife or a pair of scissors to form cutting edge 121, The sharpness initially used is fine, and at low cost, extremely abrasive, long service life.Once but cutting edge 121 damage, due to film Layer 130 is stone, and sharpening can have certain difficulty.

In addition, cutter hub 110 further includes the knife face for connecting blade part 120 and knife spine 111, film layer 130 covers entire blade part It can also continue to extend to the entire knife face of covering after 120.

Before the above-mentioned surface to the blade part 120 carries out spark discharge coating processing, do not need to carry out cutter hub 110 Surface specially treated, simple process, to reduce processing cost.

Specifically, spark discharge coat to be formed film layer 130 raw material can be 5Cr15MoV, 5Cr15Mo, In 9Cr18MoV, titanium alloy any one or more/with WC, TiC, CrC, BN, TiNC, TiN, TiAlN, CrN, ZrN, ZrO In any one or a variety of mixing.Further, using spark machine equipment, by the welding wire and blade part of above-mentioned raw material 120 121 surface contact discharge of cutting edge seeps after wire melting and forms metallurgical bonding on the surface of cutting edge 121 and cutting edge 121, should The film layer 130 that the position of metallurgical bonding i.e. 121 surface of cutting edge are formed.Due in above-mentioned raw material 5Cr15MoV, 5Cr15Mo, 9Cr18MoV, titanium alloy, WC, TiC, CrC, BN, TiNC, TiN, TiAlN, CrN, ZrN, ZrO are that hardness is higher Wear-resistant material, therefore, using above-mentioned raw material 121 surface of cutting edge formed film layer 130 after, the hardness of cutting edge 121 can be promoted And wearability.

In embodiment according to the present utility model, coated using spark discharge the film layer 130 to be formed with a thickness of D, Wherein, 5um≤D≤40um.As it can be seen that 130 thickness of film layer that the utility model is formed is considerably beyond Vacuum Deposition in the prior art The film plating layer thickness that film is formed, so that the cutting edge 121 after making to be formed film layer 130 is more wear resistant, the service life is longer.Wherein, work as shape When raw material used in film forming layer 130 are identical, and in the value range of above-mentioned D, the 130 thickness D of film layer of formation is bigger, sword The wearability of mouth 121 is better, and service life is also longer, but, spent raw material are also more, and cost is also higher.It needs It is bright, when the thickness of film layer 130 is less than 5um, since thickness is too small, it is not wear-resisting to will lead to cutting edge 121, it is easy to by film layer 130 it is completely worn out fall, to influence cutting-tool's used life；If the thickness of the film layer 130 formed is greater than 40um, one side electrical fire Spent raw material are more during flower electro-arc depositing, lead to higher cost, on the other hand when the thickness of film layer 130 reaches It after 40um, is further continued for increasing the thickness of film layer 130, the abrasion resistance and hardness nothing of cutting edge 121 is obviously improved.

Preferably, the thickness D of above-mentioned film layer 130 is 22um.The thickness has comprehensively considered the cutter after forming film layer 130 100 wearability and process costs.When the thickness D of film layer 130 is 22um, 121 wearability of cutting edge of cutter 100 is very strong, And advantage of lower cost, the thickness of film layer 130 is continued growing, although being promoted to the wearability of cutting edge 121, promotes width Degree is not worthed compared with increased cost.

Further, spark discharge is used to coat the width for the film layer 130 to be formed as B, wherein 1mm≤B≤15mm. Here " width " is relative to the distance in 111 vertical direction of knife spine.It should be noted that the width B when film layer 130 is small When 1mm, 130 width of film layer is too small to lead to that the region where cutting edge 121 cannot be completely covered, to influence the capability list of cutter It is existing；If the width B of film layer 130 is greater than 15mm, film layer 130 can be caused to raw material not beyond the region where blade part 130 Necessity waste increases cost, and influences on the abrasion resistance and hardness of cutting edge 121 little.

Other side according to the present utility model additionally provides a kind of method for processing cutter 100 as described above, root According to one embodiment, cutter 100 forms film layer 130 in single side, wherein includes the following steps:

S1: the cutter blank with cutter hub 110 is provided, wherein cutter hub 110 is equipped with blade part 120 far from one end of knife spine 111；

S2: the first surface in the above-mentioned one end of blade part 120 far from knife spine 111 puts the first edge on a knife or a pair of scissors to form cutting edge 121, such as Fig. 3 institute Show；

S3: spark discharge is carried out on 121 surface of cutting edge of above-mentioned first surface and coats to form film layer 130, such as Fig. 4 institute Show, specifically, step S3 includes:

Above-mentioned cutter blank is fixed on fixture；And

Start spark machine equipment, makes to weld by the first surface contact discharge of welding wire and blade part 120 by spark machine equipment Silk fusing, the welding wire after fusing seep the first surface in blade part 120 and form metallurgy layer with blade part 120, which is It is the film layer 130 for covering 121 surface of cutting edge of above-mentioned first surface.

According to another embodiment, after 121 surface of cutting edge of above-mentioned first surface forms film layer 130, also carry out as follows Step:

S4: the second surface in the above-mentioned one end of blade part 120 far from knife spine 111 puts the first edge on a knife or a pair of scissors to form cutting edge 121, such as Fig. 5 institute Show.

According to another embodiment, after above-mentioned second surface puts the first edge on a knife or a pair of scissors and to form cutting edge 121, following steps can also be carried out:

S5: spark discharge is carried out on 121 surface of cutting edge of above-mentioned second surface and coats to form film layer 130, such as Fig. 6 institute Show, specifically, step S5 includes:

Above-mentioned cutter blank is fixed on fixture；And

Start spark machine equipment, makes to weld by the second surface contact discharge of welding wire and blade part 120 by spark machine equipment Silk fusing, the welding wire after fusing seep the second surface in blade part 120 and form metallurgy layer with blade part 120, which is It is the film layer 130 for covering 121 surface of cutting edge of second surface.

In embodiment according to the present utility model, before above-mentioned steps S1, also need to carry out pre-treatment, including walk as follows It is rapid:

S11: the above-mentioned cutter blank with cutter hub 110 is made in punching press；

S12: above-mentioned cutter blank is heat-treated；And

S13: the cutter blank after heat treatment is subjected to calibration straightening, rolling straightening specifically is carried out to the cutter blank after heat treatment；

Further, in step S12, the step of cutter blank is heat-treated, includes:

S121: quenching, hardening heat are 1050-1080 DEG C, and cooling after predetermined hold-time；Specifically, quenching continues After 50-60 minutes, cool down 70 minutes in water or oil；

S122: tempering, tempering temperature are 150-220 DEG C, and cooling after predetermined hold-time；Specifically, it is tempered and continues 2-3 It is cooled to room temperature after hour.

By cutter blank made of punching press after above-mentioned quenching and tempering, the corrosion resistance of cutter blank, while cutter blank can be promoted Intensity and wearability relatively be heat-treated before can increase.In addition, carrying out rolling straightening to the initial cutter blank after heat treatment, also Hardness, fatigue resistance and the wearability that can be improved initial cutter blank surface, reduce the surface roughness of initial cutter blank, to mention Height is finally made cutting-tool's used life.

It should be appreciated that the utility model is not only restricted to the above-mentioned concrete mode that cutter blank is made, it is all in the prior art The cutter blank is made for realization and the mode being surface-treated to cutter blank is within the protection scope of the present utility model.

According to one embodiment, the method for processing above-mentioned cutter is further comprised the steps of:

It is whole to cutter hub 110 to carry out bevel grinding after above-mentioned steps S13.The global shape of cutter hub 110 such as Fig. 2 after bevel grinding Shown, Fig. 2 shows the side structure schematic diagrams of the cutter hub 110 after bevel grinding, wherein the side view of cutter hub 110 is in after bevel grinding Taper.

Radium-shine light processing is carried out after above-mentioned 110 bevel grinding of cutter hub, then to knife handle 150, that is, can be by laser by quotient Mark is printed upon on knife handle 150.

Above-mentioned steps S2 is carried out after carrying out radium-shine light processing to knife handle 150.It specifically, can be using abrasive machine to blade part 120 edge is refined, and so that the edge of blade part 120 is formed tip-angled shape, to form cutting edge 121, as shown in Figure 3.This reality With the novel specific equipment for being not only restricted to above-mentioned use of putting the first edge on a knife or a pair of scissors and mode of putting the first edge on a knife or a pair of scissors.

In addition, can carry out throwing mirror light and the processing of neat mouth to cutter 100 after above-mentioned steps S3, S4 or S5.

Specifically, after above-mentioned steps S3, S4 or S5, cutter 100 can be carried out throwing mirror light, makes its surface mirror surface Effect, thus aesthetic appeal, use feeling is more preferable.Wherein, throwing mirror light first can carry out rough polishing for cutter 100 using abrasive band, then Its essence is thrown as mirror effect with cotton synthetic fibre again.

Finally, carrying out neat mouth processing to the cutter 100 after throwing mirror light, make entire 100 surfacing impulse- free robustness of cutter, thus Final finished tools 100 are made.The utility model carries out the mode of neat mouth processing also without limitation to cutter 100, Suo Youxian There is the mode for being able to achieve in technology and carrying out neat mouth processing to cutter within the protection scope of the present utility model.

Further illustrate the beneficial effects of the utility model combined with specific embodiments below.

The film layer of embodiment 1 to 3 is made of the method for spark discharge described in the utility model coating, comparative example 1 Film layer to 3 is made of existing technique for vacuum coating, cutter blank substrate employed in embodiment 1 to 3 and comparative example 1 to 3 It is identical, it is all domestic 3Cr13, and each embodiment and the type of film layer raw material used by comparative example are all the same.Also, Embodiment 1 to 3 and comparative example 1 to 3 are single side coating film layer, coat putting the first edge on a knife or a pair of scissors to opposite for film layer.To embodiment 1 to 3 and right Cutter made of ratio 1 to 3 carries out simulation using experiment, and tests.Wherein, simulation is that basis disappears using the test method of experiment In actual use, the mechanism that cutter blade portion is easily destroyed is made by increasing mechanical analogue accelerated test with cutter the person of expense With the test loop number of test standard as a comparison, assessment is compared to the long-durability sharp degree of cutter.Long-durability sharp degree is surveyed Method for testing, sharpness grade evaluation method is as follows:

(1) long-durability sharp degree test method

Using dedicated testing machine, under the effect of 15N pressure, make to test knife to test paper progress reciprocating cutting, experiment Paper size is 120g yellow brown paper, and Cutting Length is 5 ㎝, and circulation is cut once and carried out a sharpness grade and comments Valence, mark one circulation terminate.

(2) sharpness grade evaluation method

After often finishing a circulating analog test, sample is subjected to cutting adhesive tape test, if evaluation object can not be cut off, is remembered It is unqualified, stopping experiment.The cycle-index of circulating analog test is recorded, cycle-index more multilist shows that long-durability sharp degree is better.

1 is seen attached list using the results of property of experiment and test by above-mentioned simulation.

Subordinate list 1

By the comparison of table 1 it is found that using identical raw material after blade part surface formation film layer, wherein using electricity Spark discharge is coated the thicknesses of layers to be formed and is far longer than the thicknesses of layers formed using vacuum coating, and spark discharge applies The process costs covered are far below vacuum coating.

Further, by analysis embodiment 1 to embodiment 3 it is found that using spark discharge coating processes, and raw material Identical, the thickness of finally formed film layer is thicker, the long-durability sharp degree of either new knife still whet a knife after long-durability sharp degree all More preferably, certain process costs are also relatively higher.Comparative example 1 is also such when using technique for vacuum coating into comparative example 3.

Cutting testing experiment is carried out after can be seen that primary whet a knife from data comparison in subordinate list 1, is applied using spark discharge Cover the cutter to form the embodiment 1 of film layer to embodiment 3, be knife before sharpening time cycle-index not and its corresponding comparison Example 1 to comparative example 3 cutter knife before sharpening time cycle-index.But tested after once whetting a knife, embodiment 1 to The cutter knife after sharpening time cycle-index in embodiment 3 is compared with the knife time cycle-index before sharpening, fall very little； However, cutter of the comparative example 1 into comparative example 3 knife after sharpening time cycle-index and the knife time cycle-index phase before sharpening Than tool significantly decreases, before much too late sharpening；Moreover, knife of the cutter after sharpening of embodiment 1 to embodiment 3 follows Ring number, much higher than cutter of the comparative example 1 into comparative example 3 knife after sharpening time cycle-index.To sum up, using electrical fire After flower electro-arc depositing forms film layer, the wearability of cutter is stronger, and the service life is longer long.

In the description of this specification unless specifically defined or limited otherwise, term " connection ", " fixation " etc. should all be done extensively Reason and good sense solution.In addition, the orientation or positional relationship of the instructions such as term " on ", "lower", "inner", "outside", "top", "bottom" is based on attached drawing Shown in orientation or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion institute The device or unit of finger must have specific direction, be constructed and operated in a specific orientation, it is thus impossible to be interpreted as to this reality With novel limitation.

In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least the one of the utility model In a embodiment or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment Or example.Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more embodiment or examples In can be combined in any suitable manner.

In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that the utility model Embodiment can be practiced without these specific details.In some instances, well known side is not been shown in detail Method, structure and technology, so as not to obscure the understanding of this specification.

Claims (10)

1. a kind of cutter (100), including cutter hub (110), the cutter hub (110) includes knife spine (111), it is characterised in that:

The cutter hub (110) is equipped with blade part (120) far from the one end of the knife spine (111), and the blade part (120) is far from institute The one end for stating knife spine (111) is equipped with cutting edge (121), and the surface of the cutting edge is coated with one layer and coats shape by spark discharge At film layer (130).

2. cutter (100) as described in claim 1, it is characterised in that:

The first surface of the blade part (120) is equipped with the cutting edge (121), and the surface of the cutting edge (121) be coated with it is described Film layer (130).

3. cutter (100) as described in claim 1, it is characterised in that:

The first surface of the blade part (120) is equipped with the cutting edge (121), and the second surface of the blade part (120) is in institute The back side for stating cutting edge (121) is coated with the film layer (130).

4. cutter (100) as described in claim 1, it is characterised in that:

The first surface and second surface of the blade part (120) are equipped with the cutting edge (121), and the first surface or Cutting edge (121) surface on two surfaces is coated with the film layer (130).

5. cutter (100) as described in claim 1, it is characterised in that:

The first surface and/or second surface of the blade part (120) are equipped with the cutting edge (121), and the first surface The film layer (130) are coated with cutting edge (121) surface of second surface.

6. cutter (100) as described in any one in claim 1-5, it is characterised in that:

The film layer (130) extends to the entire blade part (120) of covering.

7. cutter (100) as claimed in claim 6, it is characterised in that:

The cutter hub (110) further includes the knife face for connecting the blade part (120) Yu knife spine (111), and the film layer (130) extends To the covering knife face.

8. cutter (100) as described in any one in claim 1-5, it is characterised in that:

The film layer (130) with a thickness of D, wherein 5um≤D≤40um.

9. cutter (100) as described in any one in claim 1-5, it is characterised in that:

The width of the film layer (130) is B, wherein 1mm≤B≤15mm.

10. cutter (100) according to any one of claims 1-4, it is characterised in that:

The film layer (130) be one of 5Cr15MoV, 5Cr15Mo, 9Cr18MoV, titanium alloy or a variety of and WC, TiC, The film layer that one or more of CrC, BN, TiNC, TiN, TiAlN, CrN, ZrN, ZrO are mixed.