阅读说明：本技术 一种刀头及滚压刀 (Tool bit and roll extrusion sword ) 是由 刘日东 梁远平 王军 于 2021-10-08 设计创作，主要内容包括：本发明提供了一种刀头及滚压刀,该刀头包括刀头本体,刀头本体上设置有第一刀杆,第一刀杆侧壁上设置有多个压紧槽。该滚压刀包括第二刀杆、锁紧件和刀头。第二刀杆的一端开设有装配孔以及与装配孔部分重叠的锁紧槽,锁紧槽的中心轴与装配孔的中心轴之间的夹角为锐角,第一刀杆至少部分置于装配孔内,锁紧件置于锁紧槽内并部分置于压紧槽内以实现锁紧刀头。以此,在刀头装配于装配孔时,即可利用锁紧件配合压紧槽实现刀头的固定,并实现从刀头的侧面将刀头压紧,增加锁紧件与刀头的接触面,提高刀头装配的稳定性。且滚压刀的结构简单,可降低滚压刀的成本和减小体积。还有,且利用多个压紧槽,可成倍增加刀头的使用时长,提高刀头的使用寿命。(The invention provides a cutter head and a rolling cutter. The rolling knife comprises a second knife bar, a locking piece and a knife head. The assembly hole and with the locking groove of assembly hole part overlapping have been seted up to the one end of second cutter arbor, and the center pin in locking groove and the contained angle between the center pin of assembly hole are the acute angle, and the assembly hole is arranged in to first cutter arbor at least part, and the locking piece is arranged in the locking groove and partly is arranged in and is compressed tightly the inslot in order to realize the locking tool bit. With this, when the tool bit assembles in the pilot hole, can utilize the retaining member cooperation to compress tightly the fixed of groove realization tool bit to the realization compresses tightly the tool bit from the side of tool bit, increases the contact surface of retaining member and tool bit, improves the stability of tool bit assembly. And the rolling cutter has simple structure, and can reduce the cost and the volume of the rolling cutter. In addition, a plurality of pressing grooves are utilized, the service life of the cutter head can be prolonged in a multiple mode, and the service life of the cutter head is prolonged.)

1. A cutter head is characterized by comprising a cutter head body, wherein a first cutter bar is arranged on the cutter head body, and a plurality of pressing grooves are formed in the side wall of the first cutter bar;

the pressing groove comprises a first side surface and a second side surface, the first side surface and the second side surface are obliquely arranged, the first side surface is located between the second side surface and the cutter head body, and the first side surface and a central shaft of the first cutter rod are obliquely arranged.

2. The cutter head of claim 1 wherein the diameter of the first cutter shaft decreases in a direction away from the cutter head.

3. A rolling knife, comprising: a second tool holder, a locking member and a tool bit according to claim 1 or 2;

the pilot hole and with the locking groove of pilot hole part overlapping have been seted up to the one end of second cutter arbor, the contained angle between the center pin in locking groove and the center pin of pilot hole is the acute angle, the pilot hole is arranged in to first cutter arbor at least part, the retaining member is arranged in the locking groove and is partly arranged in and compresses tightly the inslot and compress tightly the tool bit.

4. The stitching knife of claim 3 wherein the mounting apertures are tapered apertures.

5. The rolling cutter according to claim 4, wherein an included angle between the first side surface and the first cutter bar is the same as an included angle between a central axis of the fitting hole and a central axis of the locking groove.

6. The rolling cutter according to claim 5, wherein the locking member is a screw, and the locking groove is provided with a thread for matching with the screw.

7. The rolling cutter according to claim 6, wherein the second cutter bar comprises a cutter handle and a chuck welded with the cutter handle in a V shape, the cutter handle is a hard alloy anti-vibration cutter handle with 20% -30% of cobalt content, the chuck is 40CrMo steel, and the locking groove and the assembling hole are both located on the chuck.

8. The stitching knife of claim 7, wherein the mounting hole has a 4mm aperture and a 4 ° taper.

9. The stitching knife of claim 8 wherein the roughness of each of the first shank outer side wall and the mounting hole side wall is less than ra0.2.

10. The rolling cutter according to claim 9 wherein the angle between the central axis of the pilot hole and the central axis of the second cutter bar is 45 °, the angle between the central axis of the pilot hole and the central axis of the locking groove is 20 °, and the angle between the first side surface and the first cutter bar is 20 °.

Technical Field

The invention relates to the technical field of rolling, in particular to a cutter head and a rolling cutter.

Background

As is known, a rolling cutter is a mechanical non-cutting plastic working method for obtaining a smooth metal surface like a mirror by using the principle of mechanical pressing, and generally comprises a cutter bar and a cutter head welded on the cutter bar.

At present, there are rolling sword of integral type and the rolling sword of removable tool bit on the market. In the former, a tool bit and a tool bar are integrated and cannot be replaced, and unstable welding easily causes cutter back-off in the machining process, so that tight machining cannot be realized. In the latter, although the cutter head can be replaced, the structure is complex, the contact area between the cutter and the cutter bar is small, unstable processing is easy to cause, and tight processing cannot be easily realized; in addition, the clamping structure of the cutter bar is complex, so that the production cost of the rolling cutter is increased, the volume of the rolling cutter is easy to be larger, and a small-diameter hole cannot be machined.

Accordingly, the prior art is in need of improvement and development.

Disclosure of Invention

The invention aims to provide a cutter head and a rolling cutter, which are used for solving the problems that the existing integral type rolling cutter head cannot be replaced and the machining is easy to give way due to the welding problem, and the problems that the existing rolling cutter with the replaceable cutter head is high in cost and large in size due to the complex structure and the machining is unstable due to the small contact area between the cutter head and a cutter rod.

The technical scheme of the invention is as follows:

on one hand, the invention provides a cutter head, which comprises a cutter head body, wherein a first cutter bar is arranged on the cutter head body, and a plurality of pressing grooves are formed in the side wall of the first cutter bar;

the pressing groove comprises a first side surface and a second side surface, the first side surface and the second side surface are obliquely arranged, the first side surface is located between the second side surface and the cutter head body, and the first side surface and a central shaft of the first cutter rod are obliquely arranged.

Further, the diameter of the first cutter rod is gradually reduced in the direction away from the cutter head.

In another aspect, the present invention further provides a rolling knife, comprising: the second cutter bar, the locking piece and the cutter head are arranged on the cutter bar;

the pilot hole and with the locking groove of pilot hole part overlapping have been seted up to the one end of second cutter arbor, the contained angle between the center pin in locking groove and the center pin of pilot hole is the acute angle, the pilot hole is arranged in to first cutter arbor at least part, the retaining member is arranged in the locking groove and is partly arranged in and compresses tightly the inslot and compress tightly the tool bit.

Further, the assembling hole is a taper hole.

Furthermore, an included angle between the first side face and the first knife rod is the same as an included angle between a central shaft of the assembling hole and a central shaft of the locking groove.

Furthermore, the locking piece is a screw, and a thread matched with the screw is arranged in the locking groove.

Furthermore, the aperture of the assembly hole is 4mm, and the taper is 4 degrees.

Furthermore, the second cutter bar comprises a cutter handle and a chuck welded with the cutter handle in a V shape, the cutter handle is a hard alloy anti-seismic cutter handle with 20% -30% of cobalt content, the chuck is made of 40CrMo steel, and the locking groove and the assembling hole are both located on the chuck.

Furthermore, the roughness of the outer side wall of the first cutter bar and the roughness of the side wall of the assembly hole are both less than Ra0.2.

Further, the included angle between the central axis of the pilot hole and the central axis of the second cutter arbor is 45 degrees, the included angle between the central axis of the pilot hole and the central axis of the locking groove is 20 degrees, and the included angle between the first side face and the first cutter arbor is 20 degrees.

The invention has the beneficial effects that: compared with the prior art, the tool bit fixing device has the advantages that the central axis of the locking groove and the central axis of the assembling hole form a certain angle, when the tool bit is assembled in the assembling hole, the locking part can be matched with the pressing groove to fix the tool bit, the tool bit can be pressed from the side face of the tool bit, the contact surface between the locking part and the tool bit can be increased, and the assembling stability of the tool bit is improved. In addition, the plurality of pressing grooves on the first cutter rod are utilized, the other side surface of the cutter head can be replaced for machining when one side of the cutter head is machined and abraded, so that the service life of the cutter head can be prolonged in a multiplied mode, the service life of the cutter head is prolonged, the rolling cutter is simple in structure, the cost of the rolling cutter can be reduced, and the size of the rolling cutter can be reduced.

Drawings

Fig. 1 is a perspective view of the stitching knife of the present invention.

Fig. 2 is an exploded view of the stitching knife of the present invention.

Fig. 3 is a block diagram of the cutter head of the present invention.

Fig. 4 is a perspective view of a second tool holder of the present invention.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1-4, an embodiment of the present invention provides a cutter head 10 and a rolling cutter. The rolling knife comprises a second knife bar 20, a locking member 30 and a knife head 10.

The cutter head 10 comprises a cutter head body 11, wherein a first cutter rod 12 is arranged on the cutter head body 11, and a plurality of pressing grooves 13 are formed in the side wall of the first cutter rod 12. The side wall of the pressing groove 13 includes a first side surface 131 and a second side surface 132, the first side surface 131 and the second side surface 132 are obliquely arranged, the first side surface 131 is located between the second side surface 132 and the cutter head body 11, and the first side surface 131 and the central axis of the first cutter arbor 12 are obliquely arranged. One end of the second cutter bar 20 is provided with an assembling hole 23 and a locking groove 24 partially overlapped with the assembling hole 23, an included angle c between the central axis of the locking groove 24 and the central axis of the assembling hole 23 is an acute angle, the first cutter bar 12 is at least partially arranged in the assembling hole 23, and the locking member 30 is arranged in the locking groove 24 and partially arranged in the pressing groove 13 to press the cutter head 10.

The present invention utilizes a certain angle between the central axis of the locking groove 24 and the central axis of the mounting hole 23, so that when the first shank 12 of the cutter head 10 is mounted in the mounting hole 23, the locking member 30 can be mounted in the locking groove 24, so that the locking member 30 is partially disposed in the mounting hole 23 and cooperates with the pressing groove 13 to lock the cutter head 10. Specifically, when the locking member 30 locks the cutter head 10, the locking member 30 abuts against the second side 132 and presses the first side 131. Therefore, the locking member 30 presses the tool bit 10 into the mounting hole 23 from the side of the tool bit 10, so that the contact surface between the locking member 30 and the tool bit 10 can be increased, and the first shank 12 can be more stably fixed in the mounting hole 23 by matching with the pressing groove 13.

In addition, a plurality of pressing grooves 13 are formed in the first cutter bar 12, therefore, when one side of the cutter head 10 is damaged along with the machining duration, another pressing groove 13 can be replaced to match with the locking piece 30 to lock the cutter head 10, so that the service life of the cutter head 10 can be increased in multiple times, the service life of the cutter head 10 can be greatly prolonged, and when the cutter head 10 is damaged, the locking piece 30 can be detached to detach the damaged cutter head 10 and replace a new cutter head 10. The rolling cutter has simple structure, and can reduce the cost and the volume of the rolling cutter.

Specifically, the locking member 30 is a screw, and a thread (not shown) for cooperating with the screw is provided in the locking groove 24, so that the locking member 30 can be used to cooperate with the thread to realize the dismounting, the replacement of the tool bit 10 is realized, and the dismounting is convenient.

In one embodiment, to improve the stability of the first shank 12 being fitted into the fitting hole 23, the diameter of the first shank 12 is gradually reduced in a direction away from the tool bit 10, and the fitting hole 23 is a tapered hole. The taper of the outer side wall of the first cutter arbor 12 is consistent with the taper of the assembly hole 23. Therefore, when the cutter head 10 is assembled on the second cutter bar 20, under the action of the locking member 30, the outer side wall of the second cutter bar 20 is attached to and pressed against the side wall of the assembling hole 23, so that the stability of assembling the cutter head 10 is improved, and the stability of the cutter head 10 is realized, thereby preventing the cutter back-off problem.

In one embodiment, the included angle a between the first side surface 131 and the first blade bar 12 is the same as the included angle c between the central axis of the assembling hole 23 and the central axis of the locking groove 24, so that the locking member 30 is engaged with the pressing groove 13 when being placed in the locking groove 24, thereby improving the stability of the assembly of the cutter head 10. If the angle f between the central axis of the assembly hole 23 and the central axis of the second blade bar 20 is 45 °, the angle c between the central axis of the assembly hole 23 and the central axis of the locking groove 24 is 20 °, and the angle a between the first side surface 131 and the first blade bar 12 is 20 °.

In one embodiment, the second tool bar 20 includes a tool shank 22 and a collet 21 welded to the tool shank 22 in a V shape, wherein the tool shank 22 is a cemented carbide anti-vibration tool shank 22 with 20% -30% of cobalt content, the collet 21 is 40CrMo steel, and the locking groove 24 and the assembly hole 23 are both located on the collet 21. The V-shaped welding is adopted, so that the contact area between the welding of the tool shank 22 and the clamping head 21 can be effectively increased, and the stability of the tool shank 22 and the clamping head 21 can be effectively improved. And the handle 22 is a hard alloy anti-vibration handle 22 with 20-30% of cobalt, so that the anti-vibration tool has a good anti-vibration effect, can control vibration of the tool bit 10 during machining, achieves a mirror effect during machining of a rolling tool, and solves the problem of vibration lines of a machined product. Wherein, optimally, the handle 22 adopts the hard alloy anti-vibration handle 22 with 25 percent of cobalt content. In addition, the 40CrMo steel has high strength, good toughness and a connecting piece with great load, and is very suitable for a rolling cutter so as to improve the strength of the rolling cutter.

In one embodiment, to further improve the stability of the assembly of the tool bit 10, the roughness of the outer side wall of the first tool bar 12 and the roughness of the side wall of the assembly hole 23 are both less than ra0.2.

In one embodiment, the taper e of the mounting hole 23 is 4 ° and the aperture d1 is 4mm, wherein the taper b of the first tool bar 12 is also 4 ° for practical purposes. The aperture and taper fit is the most ideal assembling hole 23, the structural strength of the rolling cutter is influenced by the overlarge or the undersize of the aperture or the taper, and the minimum aperture processed by the rolling cutter can reach 8 mm.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.