CN214978101U

CN214978101U - Tool bit assembly for petroleum pipe cutting

Info

Publication number: CN214978101U
Application number: CN202121568060.5U
Authority: CN
Inventors: 王金发
Original assignee: Tianjin Cosco Gretel Trading Co ltd
Current assignee: Tianjin Cosco Gretel Trading Co ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2021-12-03
Anticipated expiration: 2031-07-12

Abstract

A cutter head assembly for petroleum pipe cutting machining comprises a cutter handle and a cutter body, wherein one end of the cutter handle is clamped by a rotary table of a machine tool, and the other end of the cutter handle is axially inserted and radially pinned with the cutter body; a plurality of groups of positioning jacks are axially formed on one axial end surface of the cutter handle, and pin holes for inserting conical positioning pins are radially formed in the lower parts of the positioning jacks in a penetrating manner; the bottom surface of the cutter body is provided with a plurality of positioning columns which are axially inserted in the positioning insertion holes, and the lower parts of the positioning columns are radially provided with conical holes which penetrate through the inserted conical positioning pins. The tool bit assembly improves the connection and fixing mode of the tool handle and the tool body, reduces the precision requirement of tool handle machining, and reduces the possibility that the bolt interferes and impacts a workpiece.

Description

Tool bit assembly for petroleum pipe cutting

Technical Field

The utility model relates to a cutting tool technical field specifically is a tool bit assembly for petroleum pipe cutting process.

Background

Along with the development of the petroleum industry, the demand of petroleum pipes is also increased sharply, particularly, a plurality of sections of pipes are connected together to meet the oil extraction requirement when deep wells are mined, two adjacent pipes are connected through the threads of the pipes, and the threads bear larger force when the wells are deeper, so that the thread machining quality requirement on the pipe ends is higher and higher.

Petroleum pipe thread cutting tool among the prior art includes handle of a knife and cutter body usually, and the axial bolt of pegging graft on the cutter body realizes the axial fixity of cutter body on the handle of a knife, nevertheless discovers in the in-service use, because the axial end face structure of handle of a knife is comparatively compact and complicated, leads to reprocessing the higher and great error of the degree of difficulty of screw hole on the axial terminal surface of handle of a knife to bolt on the cutter body axial terminal surface also easily touches the work piece in the turning course, leads to the screw thread to damage.

Therefore, how to improve the connection and fixation mode of the knife handle and the knife body in the prior art, avoiding the interference of the bolt in the machining process and reducing the machining difficulty of the knife handle becomes the technical problem to be solved urgently by the personnel in the field.

Through published patent searches, the following comparison documents were found:

CN201147850Y discloses a tool for machining external threads of workpieces in the machining industry, which is used for machining external threads on a common lathe or a numerically controlled lathe, and is particularly suitable for machining external threads of workpieces with chamfer angles on end surfaces, such as oil pipes, casings, drill rods and the like used in the petroleum industry. The utility model discloses a cutter body and tool bit set up unhairing bayonet and screwer on the tool bit, and the screwer is fixed on the top of tool bit, and the left end at the tool bit is fixed to the unhairing bayonet. Use the utility model discloses the processing has the external screw thread of chamfer work piece, because the deburring sword is fixed in the left side of screwer, neither influences the getting rid of screw thread processing and burr like this, reduces again to rotate the sword platform once, has shortened process time, has improved machining efficiency, has also reduced the fault rate of equipment. Meanwhile, two cutters are integrated on one cutter body, so that the material loss of the cutter body is reduced, and the cost of the cutter is reduced.

Through analysis, the cutter in the patent and the application have great difference on the fixed structure of the cutter handle and the cutter body, so the novelty of the application is not influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's weak point, provide a petroleum pipe cutting tool bit assembly for processing, this tool bit assembly has improved the fixed mode of being connected of handle of a knife and cutter body, has reduced the precision demand of handle of a knife processing, has reduced the bolt and has produced the possibility of interfering and striking work piece.

A cutter head assembly for petroleum pipe cutting machining comprises a cutter handle and a cutter body, wherein one end of the cutter handle is clamped by a rotary table of a machine tool, and the other end of the cutter handle is axially inserted and radially pinned with the cutter body; a plurality of groups of positioning jacks are axially formed on one axial end surface of the cutter handle, and pin holes for inserting conical positioning pins are radially formed in the lower parts of the positioning jacks in a penetrating manner; the bottom surface of the cutter body is provided with a plurality of positioning columns which are axially inserted in the positioning insertion holes, and the lower parts of the positioning columns are radially provided with conical holes which penetrate through the inserted conical positioning pins.

One end of the knife handle is made into a hollow shaft, and the other end of the knife handle is made into a knife holder for positioning the knife body; a torque positioning groove which is sunken downwards is formed in the middle of the axial end face of the tool apron, positioning slopes which are inclined downwards towards the edge of the tool apron are formed on two sides of the axial end face of the tool apron, and a plurality of liquid path holes are symmetrically formed in the axial end face of the tool apron in a midspan manner; one end of the liquid path hole is communicated with the inner cavity of the hollow shaft at one end of the cutter handle, and the other end of the liquid path hole is communicated with the liquid path in the cutter body.

Further, one end of the pin hole is formed as a large-diameter through hole, the pin hole of the end radially penetrates through the circumferential outer wall of the tool holder and is formed with an internal thread, and the other end of the pin hole is formed as a small-diameter hole.

And the top end of the cutter body is provided with a cutter groove for embedding the fixed blade, one end of a liquid path in the conductor is communicated with the liquid path hole on the cutter holder, and the other end of the liquid path is communicated with the cutter groove.

And a torsion key which extends downwards and is inserted in the torsion positioning groove is formed on one side of the bottom surface of the cutter body, and the bottom surface of the cutter body is in clearance fit connection with the positioning slope surface of the cutter holder.

And the conical positioning pin is a hexagon socket head cap screw, an external thread meshed with the internal thread in the pin hole is formed on the circumferential outer wall of one end of the conical positioning pin, the middle part of the conical positioning pin is inserted and positioned in the conical hole, the periphery of the conical positioning pin is conical, and the other end of the conical positioning pin is inserted and positioned in the hole with the small diameter of the pin hole.

Also, the section of the small diameter end of the tapered hole is made elliptical.

The utility model has the advantages and the technical effect be:

the utility model discloses a petroleum pipe cutting tool bit assembly for processing, reference column axial through the cutter body bottom is pegged graft inside the handle of a knife, radially peg graft in pinhole and bell mouth by the toper locating pin, realize that the axial of cutter body on the handle of a knife is pegged graft and radial round pin tight locate function, on the bolt with cutter body axial terminal surface shifts to the circumference outer wall of handle of a knife among the prior art, the problem of bolt interference has been avoided, fix a position the cutter body by location jack and reference column, and the bolt only provides radial locking force, the required precision of handle of a knife processing has effectively been reduced.

The utility model discloses a cutter head assembly for petroleum pipe cutting, which realizes the functions of water spray cooling and chip breaking in the cutter groove by leading liquid into the liquid path and the liquid path hole; the torque key is inserted and positioned with the torque positioning groove, and the positioning slope surface is in clearance fit with the bottom surface of the cutter body and is used for sharing the radial shear force applied to the positioning column, so that the positioning precision, the positioning stability and the service life of the cutter body are improved; and finally, the small-diameter end of the conical hole is made into an oval shape, the minor axis of the oval shape is slightly larger than the small-diameter end of the conical positioning pin, and the conical positioning pin is provided with a certain insertion allowance, so that the problem that the conical positioning pin is difficult to mount due to processing error avoidance is solved.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a side view of the present invention;

FIG. 3 is a cross-sectional view of section A-A of FIG. 2;

FIG. 4 is a cross-sectional view of section B-B of FIG. 2;

fig. 5 is a schematic structural view of the tapered positioning pin of the present invention;

in the figure: 1, a cutter body; 2-positioning the jack; 3-a liquid path hole; 4-pin holes; 5-a tool apron; 6-a knife handle; 7-a knife slot; 8-torsion key; 9-torque force positioning groove; 10-a positioning column; 11-a tapered hole; 12-internal screw thread; 13-external thread; 14-tapered locating pin.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments will be exemplified in conjunction with the accompanying drawings. It should be noted that the present embodiment is illustrative, not restrictive, and the scope of the invention should not be limited thereby.

A cutter head assembly for petroleum pipe cutting machining comprises a cutter handle 6 and a cutter body 1, wherein one end of the cutter handle is clamped by a turntable of a machine tool, and the other end of the cutter handle is axially inserted and radially pinned with the cutter body; a plurality of groups of positioning jacks 2 are axially formed on one axial end face of the cutter handle, and pin holes 4 for inserting conical positioning pins 14 are radially formed at the lower parts of the positioning jacks in a penetrating manner; the bottom surface of the cutter body is provided with a plurality of positioning columns 10 which are axially inserted into the positioning insertion holes, and the lower parts of the positioning columns are radially provided with tapered holes 11 which penetrate through the inserted tapered positioning pins.

Moreover, one end of the knife handle is made into a hollow shaft, and the other end of the knife handle is made into a knife holder 5 for positioning the knife body; a torque positioning groove 9 which is sunken downwards is formed in the middle of the axial end face of the tool apron, positioning slopes which are inclined downwards towards the edge of the tool apron are formed on two sides of the axial end face of the tool apron, and a plurality of liquid path holes 3 are symmetrically formed in the axial end face of the tool apron in a midspan manner; one end of the liquid path hole is communicated with the inner cavity of the hollow shaft at one end of the cutter handle, and the other end of the liquid path hole is communicated with the liquid path in the cutter body.

Further, one end of the pin hole is formed as a large-diameter through hole, the pin hole of the end radially penetrates through the circumferential outer wall of the tool holder and is formed with an internal thread 12, and the other end of the pin hole is formed as a small-diameter hole.

And the top surface of the cutter body is provided with a cutter groove 7 embedded with a fixed blade, one end of a liquid path in the conductor is communicated with a liquid path hole on the cutter holder, and the other end of the liquid path is communicated with the cutter groove.

And, the bottom surface one side of the cutter body is equipped with the torsion key 8 that extends downwards and is inserted in the torsion constant head tank, and the bottom surface of the cutter body is connected with the positioning slope surface clearance fit of the blade holder.

And the conical positioning pin is a hexagon socket head cap screw, an external thread 13 meshed with the internal thread in the pin hole is formed on the circumferential outer wall of one end of the conical positioning pin, the middle part of the conical positioning pin is inserted and positioned in the conical hole, the periphery of the conical positioning pin is conical, and the other end of the conical positioning pin is inserted and positioned in the hole with the small diameter of the pin hole.

Additionally, the utility model discloses preferred, the fixed connection mode of blade in the sword inslot to and sword groove intercommunication liquid way is to the blade water spray, be used for cutting off the connection of iron fillings and lay the mature technical means that the structure all adopted among the prior art.

To more clearly illustrate the embodiments of the present invention, an example is provided below:

the utility model discloses a tool bit assembly for petroleum pipe cutting processing, the middle part of the tool apron is provided with a torsion positioning groove, and the two sides of the torsion positioning groove are symmetrically provided with a positioning jack and a liquid path hole, so that the cutting installation direction of the tool body on the tool handle can be conveniently adjusted, and the tool bit assembly can be used for clockwise cutting or anticlockwise cutting; the torque key at the bottom of the cutter body is inserted and positioned in the torque positioning groove in the installation process, the bottom surface of the cutter body is subjected to surface support by the positioning slope surface of the axial end surface of the cutter holder, the positioning column at the bottom of the cutter body is axially inserted and positioned in the positioning insertion hole of the cutter holder, finally, the conical positioning pin is inserted and screwed in the pin hole, the conical surface in the middle of the conical positioning pin is pressed in the conical hole of the positioning column, one end of the conical positioning pin is in threaded connection with the cutter holder, the other end of the conical positioning pin is inserted and positioned in the small-diameter blind hole in the cutter holder, the positioning column is applied with downward tensile force by the positioning pin, and the cutter body is firmly locked on the axial end surface of the cutter handle.

Finally, the parts of the utility model which are not described adopt the mature products and the mature technical means in the prior art.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. The utility model provides a cutter head assembly for petroleum pipe cutting which characterized in that: the tool comprises a tool shank and a tool body, wherein one end of the tool shank is clamped by a turntable of a machine tool, and the other end of the tool shank is axially inserted and radially pinned with the tool body; a plurality of groups of positioning jacks are axially formed on one axial end face of the cutter handle, and pin holes for inserting conical positioning pins are radially formed in the lower parts of the positioning jacks in a penetrating manner; the bottom surface of the cutter body is provided with a plurality of positioning columns which are axially inserted in the positioning insertion holes, and the lower parts of the positioning columns are radially provided with conical holes which penetrate through the inserted conical positioning pins.

2. The cutter head assembly for petroleum pipe cutting machining according to claim 1, wherein: one end of the knife handle is made into a hollow shaft, and the other end of the knife handle is made into a knife holder with a knife body positioning function; the middle part of the axial end surface of the tool apron is provided with a torque positioning groove which is sunken downwards, two sides of the axial end surface of the tool apron are provided with positioning slopes which are inclined downwards towards the edge of the tool apron, and a plurality of liquid path holes are symmetrically formed in the axial end surface of the tool apron in a midspan manner; one end of the liquid path hole is communicated with the inner cavity of the hollow shaft at one end of the cutter handle, and the other end of the liquid path hole is communicated with the liquid path in the cutter body.

3. The cutter head assembly for petroleum pipe cutting machining according to claim 1, wherein: one end of the pin hole is made into a large-diameter through hole, the pin hole of the end radially penetrates through the circumferential outer wall of the cutter holder and is made into an internal thread, and the other end of the pin hole is made into a small-diameter hole.

4. The cutter head assembly for petroleum pipe cutting machining according to claim 1, wherein: the top end of the cutter body is provided with a cutter groove for embedding a fixed blade, one end of a liquid path in the conductor is communicated with a liquid path hole on the cutter holder, and the other end of the liquid path is communicated with the cutter groove.

5. The cutter head assembly for petroleum pipe cutting machining according to claim 2, wherein: a torsion key which extends downwards and is inserted in the torsion positioning groove is formed on one side of the bottom surface of the cutter body, and the bottom surface of the cutter body is in clearance fit connection with the positioning slope surface of the cutter holder.

6. The cutter head assembly for petroleum pipe cutting machining according to claim 3, wherein: the conical positioning pin is an inner hexagon bolt, an external thread meshed with the internal thread in the pin hole is formed on the circumferential outer wall of one end of the conical positioning pin, the middle of the conical positioning pin is inserted and positioned in the conical hole, the periphery of the conical positioning pin is conical, and the other end of the conical positioning pin is inserted and positioned in the small-diameter hole of the pin hole.

7. The cutter head assembly for petroleum pipe cutting machining according to claim 6, wherein: the section of the small-diameter end of the conical hole is made into an oval shape.