CN200970800Y

CN200970800Y - Paper sheet punchip disc knife with hard alloy head

Info

Publication number: CN200970800Y
Application number: CN 200620140092
Authority: CN
Inventors: 秦旭东
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-15
Filing date: 2006-11-15
Publication date: 2007-11-07
Anticipated expiration: 2016-11-15

Abstract

The utility model relates to a paper punching round knife with a hard alloy knife head. The punching knife is used for the paper punching machine for binding the documents, in particular the punching round knife with the hard alloy knife head. The utility model comprises a knife handle, a reality, a knife body of the knife head, and a bits discharging hole way with the round section arranged at the center of the knife body. Wherein the diameter of the bits discharging hole way is increased gradually from the knife head end to the knife handle end. The utility model is characterized in that the knife handle, the reality and the knife head are components made of the common 45 steel, the seamless stainless steel tube and the hard alloy steel separately, and the knife handle and the reality, the knife head and the reality are all connected to an integer by welding. The paper punching round knife provided by the utility model can improve greatly the punching speed of the existing paper punching machine, and prolong the service life, always keep the rigidity and obtain the good punching effect in the incessant friction of the paper and the continuous punching. The reality of the seamless stainless steel tube of the utility model can be also kept the bits discharging hole way communicating without rusting and corroding.

Description

The page punching dise knife that has carbide bit

Technical field

The utility model relates to a kind of punching cutter that can be used for the page puncher of bound document, particularly a kind of page punching dise knife that has carbide bit.

Background technology

The page punching dise knife that is adopted in the existing page puncher, its structure can see from Fig. 3 and Fig. 4 that it has the cutter hub of being made up of handle of a knife and cutter head and is arranged on the cylindrical hole at cutter hub center; It is in the process of page puncher punching, and the paper scrap that is come out by the cutter head punching press discharges by the through hole at its center.It is a kind of page punching dise knife of all being made by tool steel, so following problem in use occurs: its difficulty when processing and manufacturing is big, the also difficult control of heat treatment, therefore occur following problem in using easily: 1) its cutter head is easy to bluntly, and the edge of a knife can split when running into foreign matter even broken; 2) it is as not punching for a long time, and the through hole that then stays the paper scrap that remains in tool bore also can cause cutter hub gets rusty, thus the trouble of bringing paper scrap to be difficult to discharge for later punching; 3) at page puncher running hours, because of causing annealing, the edge of a knife, the cutter head heating promptly weares and teares, do not dash the hole; 4) when the long-time continuous punching, channel of chip removal can not unimpeded, easy obstruction.In a word, the page punching dise knife that is adopted in the existing page puncher, the speed of its punching is unhappy, service life is shorter, and the not smooth fault of chip removal will occur when using continuously.

Summary of the invention

The utility model is to overcome existing problem in the above-mentioned prior art, a kind of its good result that punching speed is fast, chip removal is unobstructed when using on the page puncher is provided, and using continuously or still can obtain the page punching dise knife that has carbide bit of this effect in for a long time the use at interval, and making it have characteristics such as rational in infrastructure, durable in use, long service life.

The utility model has the page punching dise knife of carbide bit, it comprises the cutter hub of handle of a knife, body and cutter head, and be arranged on the discharging opening road in cutter hub central circular cross section, wherein the diameter in discharging opening road increases gradually from cutter head end to shank end, it is characterized in that: the assembly that its handle of a knife, body and cutter head are made by common No. 45 steel, gapless stainless steel tube and hard alloy steels respectively, and handle of a knife all connects with welding into an integral body with body, body and cutter head.

The utility model has the page punching dise knife of carbide bit, and the diameter in the discharging opening road of its cutter head place section is less than the diameter in connected body end discharging opening road.

The beneficial effects of the utility model are: 1) its cutter hub is by being separately made handle of a knife, body and cutter head three assemblies with different materials, and is linked as after the integral body with welding again, can not only keep the function of cutter hub each several part, and be strengthened; Wherein the cutter head of hard alloy steel not only can make the punching speed of page puncher improve greatly, and in continuously punching, constantly can it keep its due hardness all the time in the friction with page, thereby prolong greatly service life; The body of gapless stainless steel tube then can be guaranteed never corrosion of channel of chip removal, unobstructed all the time, and the handle of a knife of No. 45 steel still can be kept its low cost; 2) the utility model diameter of also making cutter head place section less than with the diameter of the body end of its junction, thereby the paper scrap that punching is rushed out can enter immediately bigger passage, effectively avoided because of passage at the chip removal obstacle that blocking up of porch causes, guarantee the normal chip removal of page puncher; 3) page punching dise knife of the present utility model is because of rational in infrastructure, so can durable in use and long service life.

Description of drawings

Fig. 1 and Fig. 2 are respectively right view and the front views that the utility model has the page punching dise knife of carbide bit;

Fig. 3 and Fig. 4 are respectively the right view and the front views of existing page punching dise knife;

The specific embodiment

Embodiment 1, present embodiment have the page punching dise knife of carbide bit, its structure can be seen from Fig. 1 and Fig. 2, it comprises the cutter hub of handle of a knife 1, body 2 and cutter head 3, and be arranged on the discharging opening road 4 in cutter hub central circular cross section, and the diameter in discharging opening road increases gradually from cutter head end to shank end; Handle of a knife 1 in the present embodiment, body 2 and cutter head 3 are three parts of being made by different materials, and wherein handle of a knife 1 is to be made by No. 45 common steel, and its manufacturing cost is lower; Body is that the tubing from existing gapless stainless steel tube intercepts, and the requirement that its endoporus is carried out turning or grinding, its diameter that meets the discharging opening road is increased gradually from cutter head end to shank end is again advanced to handle orientations to make things convenient for paper scrap; Cutter head is to be made by hard alloy steel, and it is sharp because of the big edge of a knife of hardness, punching speed is fast thereby make, and also wear-resisting and durable in use because of it; After handle of a knife, body and cutter head connect with welding into an integral body, can not only be by the stacker of punching as existing page punching dise knife, the paper scrap that can be rushed out the hole immediately, is rushed out by the edge of a knife with chamfering tighten and enter the discharging opening road, and the end in addition in last discharging opening road is discharged, and the page punching dise knife of present embodiment speed is fast when punching, chip removal is unobstructed, it is sharp, durable in use to keep the edge of a knife for a long time, so effective, the long service life of punching.

Embodiment 2, present embodiment have the page punching dise knife of carbide bit, and its structure can see from Fig. 1 and Fig. 2 that also the diameter  1 in the discharging opening road 4 of its cutter head place section is less than the diameter  2 in the discharging opening road 4 of connected body end; Different-diameter between them can further continue the effect that the paper scrap that brought by edge of a knife chamfering is tightened in punch process, thus make thereafter paper scrap move, unblocked until the discharge of paper scrap.

Claims

1, a kind of page punching dise knife that has carbide bit, it comprises the cutter hub of handle of a knife (1), body (2) and cutter head (3), and be arranged on the discharging opening road (4) in cutter hub central circular cross section, wherein the diameter in discharging opening road increases gradually from cutter head end to shank end, it is characterized in that: its handle of a knife (1), body (2) and cutter head (3) are respectively the assemblies of being made by common No. 45 steel, gapless stainless steel tube and hard alloy steels, and handle of a knife (1) all connects with welding into an integral body with body (2), body (2) and cutter head (3).

2, the page punching dise knife that has carbide bit according to claim 1 is characterized in that: the diameter ( in the discharging opening road of said cutter head (3) place section ₁) less than the diameter ( in the discharging opening road of connected body end ₂).