CN218903719U

CN218903719U - Quick-change U-shaped drill

Info

Publication number: CN218903719U
Application number: CN202223081308.2U
Authority: CN
Inventors: 曾志意
Original assignee: Dongguan Lijun Cnc Tool Co ltd
Current assignee: Dongguan Lijun Cnc Tool Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-04-25
Anticipated expiration: 2032-11-21

Abstract

The utility model discloses a quick-change head type U-shaped drill, which comprises a cutter bar main body and a replaceable drill point; the front end of the cutter bar main body is provided with a fixing groove; one end of the replaceable drill point is provided with a positioning connection boss corresponding to the fixing groove; the utility model discloses a removable drill point that damages appears in the use can directly dismantle the change in the U bores, and the interior blade on the removable drill point, the outer blade of center brill etc. subassembly also accessible screw dismantles the form and changes simultaneously, and the easy dismounting process is convenient and fast, cooperates through the form of location connection boss and fixed recess between removable drill point and the cutter arbor main part simultaneously, and its stability and the firm effect of assembly are also better; the damaged drill point part is replaced, and the cutter bar part can be recycled; the manufacturing cost of the U-shaped drill and the processing cost of the workpiece are also quite high in economical and practical purposes.

Description

Quick-change U-shaped drill

Technical Field

The utility model relates to the technical field of drill bit cutters, in particular to a quick-change head type U-shaped drill.

Background

A drill is a tool for hole machining that is commonly used in the machining industry. The drill bit can be divided into two main types, namely a twist drill and a U drill. Wherein, the twist drill is suitable for small-diameter hole processing technology. The U drill is more suitable for deep hole machining with large diameter and has better efficiency.

However, currently used U-drills are widely integrated, and the longer the drill bit itself, the longer the U-drill of some large diameters increases with the diameter. The U drill is used as an efficient hole machining cutter, blade abrasion easily occurs in the using process, the blade abrasion easily causes abrasion of a U drill point, the abrasion of the U drill point belongs to irreparable damage, therefore, the whole U drill is scrapped, in addition, small blades and a center drill point are arranged on the U drill point, the drill cannot be used continuously due to damage of a small structure on the drill point, and poor or scrapped workpieces are easily caused.

Therefore, the use thought of the twist drill can be used for reference, the quick-change type U drill is provided, the existing integral U drill is replaced, and the problem that the U drill is scrapped as a whole due to abrasion of the drill tip in the use process is necessarily improved, so that the quick-change type U drill is required.

Disclosure of Invention

The utility model aims to provide a quick-change type U-shaped drill, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a quick-change-head U-drill comprising: a tool bar body and a replaceable drill point; the front end of the cutter bar main body is provided with a fixing groove; one end of the replaceable drill point is provided with a positioning connection boss corresponding to the fixing groove, and the positioning connection boss is inserted into the fixing groove and locked by a fixing conical screw; an inner blade and an outer blade are detachably arranged on two sides of the other end of the replaceable drill point; the center of the other end of the replaceable drill point is detachably provided with a center drill, and the inside of the replaceable drill point is provided with a center drill adjusting screw for adjusting the extending length of the center drill.

Preferably, the both sides of cutter arbor main part are provided with the helicla flute that is used for the chip removal in the drilling process, cutter arbor main part center is provided with the first centre bore that is used for passing through the coolant liquid in the drilling process, interchangeable drill point center department has seted up the second centre bore that meets with first centre bore correspondence.

Preferably, the cutter bar main body is provided with a first water outlet, and the front end of the replaceable drill point is provided with a second water outlet correspondingly connected with the first water outlet.

Preferably, the end part of the replaceable drill tip is provided with a mounting groove for an inner blade and an outer blade, and the center of the end part of the replaceable drill tip is provided with a mounting groove for a center drill.

Preferably, the inner blade is closer to the central axis of the tool bar body than the outer blade, and the outer cutting edge of the inner blade has a certain overlapping distance with the inner cutting edge of the outer blade.

Preferably, the inner blade and the outer blade are fixed in the respective mounting grooves by blade fixing screws, and fixing screws for the center drill are arranged on the side edges of the replaceable drill point.

Preferably, the plane of the central drill is provided with a plane for pressing and fixing the fixing screw, and the central drill adjusting screw is arranged at the top of the mounting groove of the central drill.

Preferably, the cutter arbor main part front end just is provided with the screw thread through-hole with fixed recess intercommunication on being located the helicla flute, install fixed taper screw in the screw thread through-hole, fixed taper screw compresses tightly fixedly to the location connection boss of pegging graft in fixed recess.

Compared with the prior art, the utility model has the beneficial effects that:

through the design of the replaceable drill point, the positioning connection boss, the fixing groove, the detachable structure with the inner blade, the outer blade of the center drill and the like, the replaceable drill point damaged in the use process can be directly detached and replaced, meanwhile, components such as the inner blade on the replaceable drill point, the outer blade of the center drill and the like can be replaced in a screw detached mode, the disassembly and assembly process is convenient and quick, and meanwhile, the replaceable drill point is matched with the cutter bar main body in a positioning connection boss and fixing groove mode, so that the assembly stability and the firmness are good;

the blade abrasion causes drill point abrasion, so that the whole drill bit is not scrapped, one drill bit with the same size is bought, the damaged drill point part is replaced, and the cutter bar part can be recycled; the manufacturing cost of the U-shaped drill and the processing cost of the workpiece are also quite high in economical and practical purposes.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

FIG. 1 is a schematic main structure of a novel U-shaped drill with a quick-change head;

FIG. 2 is a schematic diagram of explosive assembly of the novel quick-change U-shaped drill of the present utility model;

FIG. 3 is a schematic view of an alternative drill tip according to the present utility model;

FIG. 4 is a second schematic view of the structure of the replaceable drill tip of the present utility model.

In the figure: 1. a cutter bar main body; 2. a spiral groove; 3. a fixing groove; 4. a first central bore; 5. a first water outlet hole; 6. fixing a conical screw; 7. a replaceable drill tip; 8. an inner blade; 9. a blade fixing screw; 10. a center drill; 11. an outer blade; 12. a second water outlet hole; 13. drilling an adjusting screw at the center; 14. positioning the connecting boss; 15. a second central bore.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, embodiments of the present utility model are provided: a quick-change-head U-drill comprising: a tool bar body 1 and a replaceable drill tip 7; the front end of the cutter bar main body 1 is provided with a fixing groove 3; one end of the replaceable drill point 7 is provided with a positioning connection boss 14 corresponding to the fixing groove 3, and the positioning connection boss 14 is inserted into the fixing groove 3 and locked by the fixing taper screw 6.

Specifically, as shown in fig. 2, the positioning connection boss 14 and the fixing groove 3 are precisely matched in size and shape, and the function is similar to that of a mortise and tenon structure used in a woodworking structure. Each boss side has a toper screw through-hole for use fixed taper screw 6 to be fixed in on the cutter arbor main part 1 after the installation, be provided with on the location connection boss 14 with fixed taper screw matched with taper screw groove.

Further, both sides of the other end of the replaceable drill tip 7 are detachably provided with an inner blade 8 and an outer blade 11; the center of the other end of the replaceable drill point 7 is detachably provided with a center drill 10, and the inside of the replaceable drill point 7 is provided with a center drill adjusting screw 13 for adjusting the extending length of the center drill 10.

In some embodiments, both sides of the tool shank body 1 are provided with helical flutes 2 for chip removal during drilling. The center of the cutter bar main body 1 is provided with a first center hole 4 for passing through cooling liquid in the drilling process, and the center of the replaceable drill point 7 is provided with a second center hole 15 correspondingly connected with the first center hole 4; the cutter bar main body 1 is provided with a first water outlet hole 5, and the front end of the replaceable drill point 7 is provided with a second water outlet hole 12 correspondingly connected with the first water outlet hole 5.

In addition, as shown in fig. 2 and 4, the first central hole 4 and the second central hole 15 correspondingly connected with the first central hole are used as inner cooling hole channels for the action of cooling liquid in the drilling process; the first water outlet hole 5 and the second water outlet hole 12 correspondingly connected with the first water outlet hole serve as two water outlet channel openings arranged at the front end of the cutter bar, are matched with the linked replaceable drill point 7, and play roles in cooling and flushing away waste residues in the drilling process.

The end of the replaceable drill tip 7 is provided with a mounting groove for an inner blade 8 and an outer blade 11, and the center of the end of the replaceable drill tip 7 is provided with a mounting groove for a center drill 10.

As shown in fig. 3, the inner blade 8 is closer to the central axis of the tool bar body 1 than the outer blade 11, and the outer cutting edge of the inner blade 8 has a certain overlapping distance with the inner cutting edge of the outer blade 11; when in internal and external cutting, the outer side cutting edge of the inner blade 8 and the inner side cutting edge of the outer blade 11 have a certain superposition distance, so that the effective cutting diameter of the cutter is ensured.

Preferably, the inner blade 8 and the outer blade 11 are fixed in the respective mounting grooves by means of blade fixing screws 9, and the side edges of the replaceable drill tip 7 are provided with fixing screws for the center drill 10.

As shown in fig. 3, the plane of the center drill 10 is provided with a plane for pressing and fixing the fixing screw, and the fixing screw plays a fixing role by pressing the plane of the center drill 10 during the installation process. The center drill adjusting screw 13 is arranged at the top of the mounting groove of the center drill 10; the center drill 10 is provided with a bolt device for adjusting the length of the center drill 10 at the center of the replaceable drill point 7 at the bottom of the installation groove. The length of the center drill 10 can be adjusted according to the length of the control bolt.

The installation end of the center drill 10 is provided with a notch, and the notch is connected with the inner cutting edge of the inner blade 8. Ensuring that no invalid cutting exists in the drilling process of the tool; the center drill 10 has the function of centering in the drilling process, so that the drill bit is not deviated in deep hole machining, and the drilling accurate size is ensured.

The front end of the cutter bar main body 1 and the spiral groove 2 are provided with threaded through holes communicated with the fixing grooves 3, the threaded through holes are internally provided with fixing conical screws 6 in a threaded manner, and the fixing conical screws 6 compress and fix positioning connection bosses 14 inserted into the fixing grooves 3; two fixed conical screw 6 mounting threaded holes are formed in the front end edge of the cutter bar spiral groove 2, and the cutter bar main body 1 and the replaceable drill point 7 are fixed through the fixed conical screws 6 at two ends after being mounted through the concave-convex groove.

In summary, these problems are solved by the improvements described above, which has the following advantages: in the use process, the blade is worn to cause the drill point to be worn, so that the whole drill bit is not scrapped, one drill bit as large as the whole drill bit is purchased, the damaged drill point part is replaced, and the cutter bar part can be recycled;

in the large-diameter integral U-shaped drill, one drill bit is very long and very high in scrapping and damaging cost, and the processing cost is increased to a certain extent. The utility model provides a novel U of interchangeable formula bores this problem of effectual solution, no matter follow U bores manufacturing cost on, also the processing cost of work piece also obtains very big economic nature and practical purpose.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A quick-change-head U-drill, comprising:

a cutter bar main body (1);

a replaceable drill point (7) connected to the end of the tool bar body (1);

a fixing groove (3) arranged at the front end of the cutter bar main body (1), wherein

One end of the replaceable drill point (7) is provided with a positioning connection boss (14) corresponding to the fixing groove (3), and the positioning connection boss (14) is inserted into the fixing groove (3) and locked by a fixing conical screw (6);

an inner blade (8) and an outer blade (11) which are detachably arranged on two sides of the other end of the replaceable drill point (7);

the center drill (10) is detachably arranged at the center of the other end of the replaceable drill point (7), and a center drill adjusting screw (13) for adjusting the extending length of the center drill (10) is arranged in the replaceable drill point (7).

2. A quick-change-head U-drill as defined in claim 1, wherein: spiral grooves (2) for removing chips in the drilling process are formed in two sides of the cutter bar main body (1).

3. A quick-change-head U-drill as defined in claim 1, wherein: the center of the cutter bar main body (1) is provided with a first center hole (4) for passing through cooling liquid in the drilling process;

the center of the replaceable drill point (7) is provided with a second center hole (15) correspondingly connected with the first center hole (4).

4. A quick-change-head U-drill as defined in claim 1, wherein: a first water outlet hole (5) is formed in the cutter bar main body (1);

the front end of the replaceable drill point (7) is provided with a second water outlet hole (12) correspondingly connected with the first water outlet hole (5).

5. A quick-change-head U-drill as defined in claim 1, wherein: the end part of the replaceable drill point (7) is provided with a mounting groove for an inner blade (8) and an outer blade (11), and the center of the end part of the replaceable drill point (7) is provided with a mounting groove for a center drill (10).

6. The quick-change-head U-drill of claim 5 wherein: the inner blade (8) and the outer blade (11) are fixed in respective mounting grooves through blade fixing screws (9), and fixing screws for a center drill (10) are arranged on the side edges of the replaceable drill point (7).

7. The quick-change-head U-drill of claim 6 wherein: the plane of the center drill (10) is provided with a plane for pressing and fixing a fixing screw, and the center drill adjusting screw (13) is arranged at the top of the mounting groove of the center drill (10).

8. A quick-change-head U-drill as claimed in claim 2, wherein: the front end of the cutter bar main body (1) and the spiral groove (2) are provided with a threaded through hole communicated with the fixing groove (3), a fixing conical screw (6) is arranged in the threaded through hole in a threaded manner,

the fixing taper screw (6) compresses tightly and fixes the positioning connection boss (14) inserted in the fixing groove (3).