CN217018633U - BBT cutter main shaft of digit control machine tool - Google Patents

Abstract

The utility model provides a BBT cutter main shaft of a numerical control machine tool, which comprises a main shaft box and a main shaft arranged in the main shaft box, wherein a BBT cutter is arranged in the main shaft; the BBT cutter comprises a cutter handle and a cutter arranged in the cutter handle; an inward mounting taper hole is formed in the outer end face of the main shaft and used for mounting a tool shank; the mounting taper hole is provided with a spindle conical surface, the rear end of the cutter handle is provided with a cone, and the cone is provided with a cutter handle conical surface matched with the spindle conical surface; the front end of the main shaft is provided with an elastically deformable cutter clamping head, and the mounting taper hole is positioned in the cutter clamping head; the rear end of the main shaft is provided with an oil hydraulic cylinder which can compress and deform the cutter clamping head; when the tool magazine is used for changing tools back and forth, the conical surfaces of the tool handles and the mounting conical surfaces can be tightly attached to each other while the tool handles and the main shaft are tightly attached to each other, the contact area of the tool handles and the main shaft is increased, so that the two surfaces of the tool handles are restrained to reduce resonance, the rigidity is increased, the high-speed heavy cutting effect is enlarged, and the overall stability is enhanced.

Description

BBT cutter main shaft of digit control machine tool

Technical Field

The utility model relates to the technical field of machine tool parts, in particular to a BBT cutter spindle of a numerical control machine tool.

Background

At present, a numerical control machining center in China is widely used for a BT main shaft and a BBT main shaft in a main shaft interface of a machined part; although the BBT tool shank can be used on the BT spindle, the two-side positioning function cannot be realized, and in addition, the BT tool shank can also be used on the BBT spindle, the two-side positioning function is equivalently abandoned, and the improvement of the processing efficiency and the cost saving are equivalently abandoned; along with market's demand to BBT main shaft equipment increases, partial lathe producer does not standardize BBT equipment for BBT handle of a knife and BBT main shaft use simultaneously make a round trip the tool changing in-process also can't accomplish fine two sides restraint, cause the machining stability not enough, restriction production effect.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a BBT tool spindle of a numerical control machine tool.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a BBT cutter spindle of a numerical control machine tool comprises a spindle box and a spindle arranged in the spindle box, wherein a BBT cutter is arranged in the spindle; the BBT cutter comprises a cutter handle and a cutter arranged in the cutter handle; an invaginated mounting taper hole is arranged on the outer end face of the main shaft and used for mounting the cutter handle; the mounting taper hole is provided with a spindle conical surface, the rear end of the cutter handle is provided with a cone, and the cone is provided with a cutter handle conical surface matched with the spindle conical surface; the front end of the main shaft is provided with an elastically deformable tool clamping head, and the mounting taper hole is positioned in the tool clamping head; the rear end of the main shaft is provided with an oil hydraulic cylinder which can compress and deform the cutter clamping head.

In a preferable technical scheme, an expansion spring is arranged between the outer side of the main shaft and the inner side of the main shaft box.

In a preferred technical scheme, a connecting ring is arranged on the outer side of the main shaft, and a plurality of screws used for connecting the main shaft box are arranged on the connecting ring.

In the preferred technical scheme, the main shaft is connected with the main shaft box through a connecting ring, and the main shaft can be connected in the connecting ring in a forward and backward movement mode.

In a preferable technical scheme, a support piece is arranged in the spindle box and close to the tail end of the oil hydraulic cylinder.

In a preferable technical scheme, an oil cylinder electromagnetic valve is arranged on the side surface of the oil hydraulic cylinder.

According to the technical scheme, compared with the prior art, the utility model has the following beneficial technical effects:

when the tool magazine carries out tool changing back and forth, the conical surfaces of the tool shank and the mounting conical surfaces can be tightly attached to each other by the tool shank and the main shaft, meanwhile, the end surfaces of the tool shank and the main shaft are also attached to each other through elastic deformation of the tool clamping head, the contact area between the tool shank and the main shaft is increased, so that the two surfaces are restrained integrally to reduce resonance, the rigidity is increased, the high-speed heavy cutting effect is enlarged, the integral stability is enhanced, and the production benefit is favorably improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is a partial structural schematic diagram of the present invention.

Fig. 3 is an exploded structure diagram of the spindle and the tool holder.

Reference numerals: 100. a main spindle box; 200. a main shaft; 210. a knife handle; 220. a cutter; 230. installing a taper hole; 231. a spindle taper; 221. a conical surface of the cutter handle; 240. clamping a cutter head; 250. an oil hydraulic cylinder; 260. a tension spring; 270. a connecting ring; 271. a screw; 110. a support member; 251. an oil cylinder electromagnetic valve.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

In the description of the present application, it is to be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1-3, the BBT tool spindle device for a numerical control machine tool according to the present invention is configured such that a BBT tool can be replaced in another tool magazine in the spindle device during operation; the spindle box 100 and the spindle 200 are arranged in the spindle box 200, a BBT knife is embedded in the spindle 200 and comprises a knife handle 210 and a knife 220 arranged in the knife handle 210, the knife 220 is fixedly embedded in the knife handle 210 to form an integral BBT knife, when the BBT knife is replaced, the knife 220 and the knife handle 210 are integrally replaced, the knife 220 faces outwards, and the spindle 200 is driven to rotate to process a product; the outer end face of the main shaft 200 is provided with an inward-recessed mounting taper hole 230, the mounting taper hole 230 is used for mounting the cutter handle 210, and the cutter handle 210 and the cutter 220 form an integral BBT cutter, namely, the mounting or dismounting process from the main shaft 200 when the BBT cutter is replaced is realized through the mounting taper hole 230; the mounting taper hole 230 is provided with a spindle taper 231, the rear end of the cutter 220 is provided with a cone, the cone is provided with a cutter handle taper 221 matched with the spindle taper 231, the cone of the cutter 220 and the mounting taper hole 230 on the spindle 200 are arranged so that the cutter handle 210 can be embedded and mounted in the spindle 200, and during mounting, the spindle taper 231 and the cutter handle taper 221 are attached; the front end of the main shaft 200 is provided with an elastically deformable tool clamping head 240, and the mounting taper hole 230 is located in the tool clamping head 240, that is, the tool clamping head 240 is the foremost part of the main shaft 200; the rear end of the main shaft 200 is provided with an oil hydraulic cylinder 250 which can compress and deform the cutter clamping head 240; in the implementation process of the utility model, the conical surfaces and the end surfaces of the main shaft 200 and the tool holder 210 need to be attached to each other on two sides, and the gap between the end surfaces of the tool holder 210 and the main shaft 200 must be eliminated, which is difficult to realize under general conditions, so that the two-side attachment needs to be achieved by using an elastic deformation mode for the tool clamping head 240; as shown in fig. 2, in the tool changing process, when the tool holder 210 is initially mounted on the main shaft 200, a gap exists between the end surfaces of the tool holder and the main shaft, and under the pressure of the oil hydraulic cylinder 250, the mounting tapered hole 230 of the clamping tool bit 240 is stressed and expanded to generate elastic deformation, so that the gap between the end surfaces of the main shaft 200 and the tool holder 230 is eliminated, and the purpose of simultaneously attaching the tapered surface and the end surface is achieved.

Furthermore, a telescopic spring 260 is arranged between the outer side of the main shaft 200 and the inner side of the main spindle box 100, a connecting ring 270 is arranged on the outer side of the main shaft 200, the connecting ring 270 is fixedly connected to the end surface of the outer side of the main spindle box 100 through a plurality of screws 271, the main shaft 200 is connected with the main spindle box 100 through the connecting ring 270, and the main shaft 200 can be connected in the connecting ring 270 in a forward and backward movement manner; a support member 110 is arranged at the end, close to the oil hydraulic cylinder 250, in the spindle box 100, and the spindle 200 stops moving after contacting the support member 110 when moving backwards; the side surface of the oil hydraulic cylinder 250 is provided with an oil cylinder electromagnetic valve 251; after the tool clamping head 240 is pressed, the relation between the elastic deformation of the installation taper hole 230 and the axial displacement of the tool shank 210 is very tight, so that the axial displacement of the tool shank 210 is very important to control, the tool shank 210 enters the installation taper hole 230 and pushes the spindle 200 to move backwards, and meanwhile, the telescopic spring 260 enables the spindle 200 to generate a forward acting force, so that the primary installation of the tool shank 210 is embedded into the installation taper hole 230 as much as possible; the main shaft 200 moves backwards to enable the tail end to contact the support piece 110 to stop displacement, the oil hydraulic cylinder 250 extends after contacting the support piece 110 to enable the main shaft 200 to move forwards until the main shaft is clamped and stopped by the connecting ring 360, then the clamping tool bit 240 is elastically deformed after being subjected to pressure by the pressure, the tool shank 210 can smoothly continue to go deep into the installation taper hole 230, a gap between the tool shank 210 and the end face of the main shaft 200 is eliminated, the purpose of simultaneously attaching the end face and the taper face is achieved, meanwhile, the main shaft 200 clamps the tool shank 210, the end face is closely attached to the taper face, the whole restraint is less in resonance when the contact area is increased, the rigidity is increased, the high-speed heavy cutting effect is enlarged, and the whole stability is enhanced; the support 110 supports the main shaft 200 not to move backward in the working operation; when the equipment needs to exchange tools in the warehouse, the oil cylinder electromagnetic valve 251 is reversed, the oil hydraulic cylinder 250 retracts reversely, the tool holder 210 is loosened by the tool clamping head 240, and the tool holder 210 can be smoothly taken out after tool loosening is achieved so that tools can be exchanged.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A BBT cutter spindle of a numerical control machine tool comprises a spindle box (100) and a spindle (200) arranged in the spindle box (100), wherein a BBT cutter is arranged in the spindle (200); the method is characterized in that: the BBT cutter comprises a cutter handle (210) and a cutter (220) arranged in the cutter handle (210); an inward mounting taper hole (230) is formed in the outer end face of the main shaft (200), and the mounting taper hole (230) is used for mounting the cutter handle (210); the mounting conical hole (230) is provided with a main shaft conical surface (231), the rear end of the cutter handle (210) is provided with a cone, and the cone is provided with a cutter handle conical surface (221) matched with the main shaft conical surface (231); the front end of the main shaft (200) is provided with a tool clamping head (240), and the mounting taper hole (230) is positioned in the tool clamping head (240); the rear end of the main shaft (200) is provided with an oil hydraulic cylinder (250) which can compress and deform the cutter clamping head (240).

2. The BBT cutter spindle of the numerical control machine tool as claimed in claim 1, wherein: an expansion spring (260) is arranged between the outer side of the main shaft (200) and the inner side of the main shaft box (100).

3. The numerical control machine BBT cutter spindle of claim 1, characterized in that: the outer side of the main shaft (200) is provided with a connecting ring (270), and the connecting ring (270) is provided with a plurality of screws (271) used for connecting the main shaft box (100).

4. The numerical control machine BBT cutter spindle of claim 3, characterized in that: the spindle (200) is connected with the spindle box (100) through a connecting ring (270), and the spindle (200) can be connected in the connecting ring (270) in a front-and-back movement mode.

5. The numerical control machine BBT cutter spindle of claim 1, characterized in that: a supporting piece (110) is arranged at the end, close to the oil pressure cylinder (250), in the spindle box (100).

6. The numerical control machine BBT cutter spindle of claim 1, characterized in that: an oil cylinder electromagnetic valve (251) is arranged on the side surface of the oil hydraulic cylinder (250).

Images