CN212096725U

CN212096725U - Scroll saw cutting knife

Info

Publication number: CN212096725U
Application number: CN201922424583.1U
Authority: CN
Inventors: 廖志荣; 德拉戈斯·阿辛特; 吴冰
Original assignee: NINGBO XIECHENG POWER TOOLS CO Ltd
Current assignee: NINGBO XIECHENG POWER TOOLS CO Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-12-08
Anticipated expiration: 2029-12-25

Abstract

The utility model relates to a scroll cutting knife, which comprises a knife bar and a knife handle, wherein the knife bar is connected on the knife handle, at least two cutting edges are arranged on the knife bar, the cutting edges are spirally wound from the first end to the second end of the outer circumferential wall of the knife bar and are arranged at intervals, a plurality of knife teeth are arranged on each cutting edge at intervals, and the projection of the knife teeth on the plane vertical to the knife bar is sequentially connected along the circumferential direction of the knife bar, thus the arrangement of the cutting edges can ensure that the cutting knife cuts more smoothly in one cutting stroke; the design that the projection of a plurality of sword teeth on the plane perpendicular with the cutter arbor links up in proper order along the circumference of cutter arbor can guarantee no matter which angle cutting is commuted to the cutting knife, all can have corresponding sword tooth and area cutting material department of meeting in the cutting stroke together, still guaranteed the cutting effect when giving consideration to and turning to in a flexible way.

Description

Scroll saw cutting knife

Technical Field

The utility model relates to a cutting tool field especially relates to a scroll saw cuts cutting knife.

Background

Wood cutting can be performed by using various tools, such as chain saws, band saws, circular saws, wire saws and the like, wherein the jig saws are widely used for domestic wood cutting due to the characteristics of small volume, low noise, convenience in carrying and the like. Most of existing wire saw cutters are slender and thin straight blades, when the surfaces of materials are cut, cutting is mostly carried out along straight lines or smooth curves, when needed cutting seams are complex curves or even irregular graphs, the position and the angle of the wire saw cutter need to be adjusted for many times in the machining process, the workload is increased, the labor intensity is improved, and the fact that the section deviates from the preset position is easily caused.

For example, chinese patent No. CN201220526391 discloses an electric jigsaw, which comprises a bottom plate, a housing, and a motor, an eccentric wheel and a reciprocating rod arranged in the housing, wherein the eccentric wheel is connected with a driving shaft of the motor, a saw blade is connected to the lower end of the reciprocating rod, and the saw blade is a slender and thin blade, so that the above problems occur during use.

For another example, chinese patent No. CN2477333Y discloses a "jig saw blade", which is made of round metal wire, with saw teeth distributed in the middle of the round metal wire, and no saw teeth at both ends of the round metal wire. Although the traditional slender and light blade form is changed by the saw blade in the form, and the turning of the blade is realized to a certain extent, the round metal wire is small, the strength of sawteeth connected with the round metal wire is obviously not guaranteed, the cutting effect is influenced if the sawteeth are too short, and the turning flexibility is influenced if the sawteeth are too long, so that the cutting effect and the turning flexibility are difficult to be considered in the actual cutting process; in addition, the arrangement along the circumference of the round metal wire can cause the wood chips to be blocked during the cutting process, and the cutting effect is influenced.

Therefore, further improvements are needed for the same type of wire saw.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the current situation to above-mentioned prior art provides a good just turns to nimble coping saw cutting knife of cutting effect.

The utility model aims to solve the second technical problem that, a fretsaw cutting knife convenient to the chip removal, can not lead to the saw-dust jam is provided.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a scroll cutting knife, includes cutter arbor and handle of a knife, the cutter arbor is connected on the handle of a knife, be provided with two at least cutting edges on the cutter arbor, at least two the cutting edge is from the first end of cutter arbor periphery wall to second end spiral winding and interval setting, each the interval is provided with a plurality of sword teeth on the cutting edge, and is a plurality of the projection of sword tooth on the plane with cutter arbor looks vertically is followed the circumference of cutter arbor links up in proper order.

In order to ensure uniform cutting in all directions, the projection parts of two adjacent cutter teeth on each cutting edge on a plane perpendicular to the cutter bar are overlapped. The overlapping of the cutter teeth can ensure that more than one tooth is arranged in each direction in an effective stroke to cut materials, the cutting quality is ensured, the continuous cutting after partial or few teeth are abraded can be prevented, and the service life is prolonged.

Furthermore, the projection overlapping degree of two adjacent cutter teeth on each cutting edge on a plane vertical to the cutter bar is 10-20%. Too large overlap can make the number of teeth of unilateral too much, and each sword tooth can not the most effective utilization, can influence cutting efficiency on the contrary, therefore overlaps 10% -20% preferably, guarantees cutting quality like this, promotes the cutting effect.

In the design of the jigsaw, taking into account the parameters for matching the inner diameter and the tooth thickness of the tool, it is preferred that the overlap of the projections of two adjacent teeth on each of said cutting edges in a plane perpendicular to the tool holder is 15%, thereby ensuring that more than one tooth cuts the material in each direction during an effective cutting stroke.

When the saw blade cuts wood, the saw blade keeps the TPI at 6-8 degrees, so that the cutting efficiency is high, due to size limitation, the front angle alpha of the cutter tooth is preferably 30-40 degrees, and the back angle beta of the cutter tooth is 30 degrees, so that each stroke has 6 teeth in a plurality of strokes of single cutting of the cutting knife, namely the TPI is 6, and the selection of the front angle and the back angle can further ensure the cutting quality and improve the cutting efficiency.

The design height and the thickness of the cutter tooth can be changed according to the designed cutter size and the strength of a cutting material, preferably, the tooth height H of the cutter tooth is 2-4 mm, and the tooth thickness L of the cutter tooth is 1-2 mm, so that the design of the tooth height and the tooth thickness ensures that the cutter tooth can cover the whole circumferential cutting surface in a single stroke, the strength of the cutter tooth is enhanced, and the size and the quality of the cutter can be effectively reduced.

Specifically, the tooth height H of the cutter tooth is 3mm, and the tooth thickness L of the cutter tooth is 1.5 mm. The tooth height H enables the cutter length to have two full-tooth cutting strokes according to the proportion of the inner diameter and the outer diameter of the cutter and the cutter length, and the tooth thickness is 1.5mm, so that 2 teeth in every 45-degree direction in each stroke can be used for cutting materials.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: a chip groove for discharging the wood chips is formed between every two adjacent cutting edges, so that the wood chips can be smoothly discharged after being cut, and the blockage cannot be caused.

Compared with the prior art, the utility model has the advantages of: the fretsaw cutting knife comprises a knife rod and a knife handle, wherein the knife rod is connected to the knife handle, at least two cutting edges are arranged on the knife rod, the at least two cutting edges are spirally wound from a first end to a second end of the outer peripheral wall of the knife rod and are arranged at intervals, a plurality of knife teeth are arranged on each cutting edge at intervals, and the projections of the knife teeth on a plane vertical to the knife rod are sequentially connected along the circumferential direction of the knife rod, so that the arrangement of the cutting edges can ensure that the cutting knife cuts more smoothly in one cutting stroke; the design that the projection of a plurality of sword teeth on the plane perpendicular with the cutter arbor links up in proper order along the circumference of cutter arbor can guarantee no matter which angle cutting is commuted to the cutting knife, all can have corresponding sword tooth and area cutting material department of meeting in the cutting stroke together, still guaranteed the cutting effect when giving consideration to and turning to in a flexible way.

Drawings

Fig. 1 is a schematic view of the overall structure of a cutting knife according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

fig. 4 is a schematic view of another angle of the overall structure of fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 4, for the preferred embodiment of the present invention, in this embodiment, the wire saw cutting knife includes a knife bar 1 and a knife handle 2, wherein the knife bar 1 is connected to the knife handle 2, and the knife bar 1 and the knife handle 2 can be connected via a connecting member such as a screw, and can also be welded or integrally cast.

Be provided with two at least cutting edges 11 on foretell cutter arbor 1, be formed with between two adjacent cutting edges 11 and supply the exhaust chip groove 1a of saw-dust, the saw-dust that produces like this in the cutting process will discharge along chip groove 1a along with the effect of cutting knife, can not lead to blockking up.

The cutting edges 11 in this embodiment are two, certainly can also be many, two cutting edges 11 are spirally wound from the first end of the outer peripheral wall of the cutter bar 1 to the second end and are arranged at intervals, a plurality of cutter teeth 12 are arranged on each cutting edge 11 at intervals, and the projections of the cutter teeth 12 on the plane perpendicular to the cutter bar 1 are sequentially connected along the circumferential direction of the cutter bar 1, namely, in a stroke of cutting by the cutting edges 11, the distribution of the cutter teeth 12 covers the circumferential direction of the whole cutter bar 1, thus, when cutting, each direction is changed, the corresponding cutter teeth 11 on the cutter bar 1 can cut, and it is ensured that the whole cutter can be flexibly switched in different directions.

In each cutting edge 11, the projections of the two adjacent cutter teeth 12 on the plane perpendicular to the cutter bar 1 partially overlap, specifically, in the present embodiment, the overlap of the projections of the two adjacent cutter teeth 12 on the plane perpendicular to the cutter bar 1 is 10% to 20%, and specifically, the overlap of the projections of the two adjacent cutter teeth 12 on the plane perpendicular to the cutter bar 1 is 15%.

When the wood is cut, the saw blade has higher cutting efficiency when the TPI is kept at 6-8, due to size limitation, in the embodiment, the front angle alpha of the cutter tooth is 30-40 degrees, and the back angle beta of the cutter tooth is 30 degrees, so that in a plurality of strokes of single cutting of the cutter, each stroke has 6 teeth, namely the TPI is 6, and the selection of the front angle and the back angle can further ensure the cutting quality and improve the cutting efficiency; in addition, the height H of the cutter tooth 12 is 2-4 mm, the thickness L of the cutter tooth 12 is 1-2 mm, specifically, the height H of the cutter tooth 12 is 3mm, and the thickness L of the cutter tooth 12 is 1.5 mm.

Claims

1. The utility model provides a scroll saw cutting knife which characterized in that: including cutter arbor (1) and handle of a knife (2), cutter arbor (1) is connected on handle of a knife (2), be provided with two at least cutting edges (11) on cutter arbor (1), at least two cutting edge (11) are from the first end of cutter arbor (1) periphery wall to second end spiral winding and interval setting, each interval is provided with a plurality of teeth of a knife (12) on cutting edge (11), and is a plurality of teeth of a knife (12) are followed with the projection on cutter arbor (1) looks vertically plane the circumference of cutter arbor (1) links up in proper order.

2. The wire saw cutting blade according to claim 1, wherein: the projection parts of two adjacent cutter teeth (12) on each cutting edge (11) on a plane vertical to the cutter bar (1) are overlapped.

3. The wire saw cutting blade according to claim 2, wherein: the overlapping degree of the projections of two adjacent cutter teeth (12) on each cutting edge (11) on a plane vertical to the cutter bar (1) is 10-20%.

4. A wire saw cutting blade according to claim 3, wherein: the projection degree of the adjacent two cutter teeth (12) on each cutting edge (11) on a plane vertical to the cutter bar (1) is 15%.

5. The wire saw cutting blade according to claim 1, wherein: the rake angle alpha of the cutter tooth (12) is 30-40 degrees, and the relief angle beta of the cutter tooth (12) is 30 degrees.

6. A wire saw cutting blade according to any one of claims 1 to 5, wherein: the tooth height H of the cutter tooth (12) is 2-4 mm, and the tooth thickness L of the cutter tooth (12) is 1-2 mm.

7. The wire saw cutting blade according to claim 6, wherein: the tooth height H of the cutter tooth (12) is 3mm, and the tooth thickness L of the cutter tooth (12) is 1.5 mm.

8. A wire saw cutting blade according to any one of claims 1 to 5, wherein: a chip groove (1a) for discharging the wood chips is formed between two adjacent cutting edges (11).