CN216541023U

CN216541023U - Modular cutter bar with replaceable head module

Info

Publication number: CN216541023U
Application number: CN202123156060.7U
Authority: CN
Inventors: 丁其中
Original assignee: Wuxi Wanliu Precision Technology Co ltd
Current assignee: Wuxi Wanliu Precision Technology Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-05-17
Anticipated expiration: 2031-12-15

Abstract

The utility model discloses a modularized drill bit with a replaceable tool bit, and belongs to the technical field of machining tools. The modular cutter bar of the replaceable head module comprises a cutter body and a head module arranged on the cutter body, and a cutter head and a blade are arranged on the head module; the cutter body comprises a clamping part and a connecting part, at least one second spiral groove is formed in the surface of the connecting part, and the connecting part is fixedly connected with the head module; the head module comprises a mounting part, and a blade is mounted on the mounting part; the top of head module has seted up the mounting groove, install detachable tool bit in the mounting groove. The utility model can realize that a plurality of cutter heads with different diameters are used on the same cutter body, thereby effectively saving the cost, and having high drilling precision, long service life of the cutter head, high processing stability and high production efficiency.

Description

Modular cutter bar with replaceable head module

Technical Field

The utility model relates to a modular cutter bar with a replaceable head module, and belongs to the technical field of machining cutters.

Background

The drill used in the metal cutting process is commonly referred to as a twist drill. Twist drills are tools that drill round holes in a workpiece by rotary cutting thereof about a fixed axis. The spiral flute is spiral-shaped, so that the product is named. Twist drills can be used clamped on hand-held drilling tools, both manual and electric, or drilling, milling, turning and even machining centers. The bit material is typically high speed tool steel or cemented carbide. Therefore, the traditional metal cutting drill bit is commonly called high-speed steel twist drill and hard alloy twist drill.

Compared with a hard alloy twist drill, the high-speed steel twist drill used for machining in the metal cutting process has short service life, low efficiency and poor precision, and is replaced by a basic hard alloy twist drill in high-requirement application occasions. The hard alloy is composed of noble metal tungsten, cobalt and trace rare elements, and is non-renewable, because the twist drill made of the integral hard alloy has high cost, consumes more hard alloy materials, has more restrictions on processing application occasions, and in the process of large-diameter drilling, the twist drill made of the integral hard alloy has high manufacturing and using cost and is very expensive. Therefore, the hard alloy twist drill has no economic value in the aspect of large-diameter and deep hole processing application.

The drill bit for disassembling and replacing the cutter head is designed in the prior art, the problems of high cost, deep hole machining and the like are solved, and the drill bit has good advantages. However, many problems are common to the existing drill bits with replaceable bit. For example: when soft steel, titanium and stainless steel are drilled and processed, some split type drill bits clamped by deformation are easy to turn around in the tool retracting process to cause damage to drill rods, so that high-value parts are scrapped. Because high temperature, high load produce in the cutting process, this can lead to leaning on the tight split type drill bit's of deformation drilling rod to reach fatigue life limit too early, for example use 10 ~ 20 times just need to trade a tool bit, this will lead to the tool bit not to press from both sides tightly to influence drilling accuracy, influence tool bit life, also influence processing stability.

In the aspect of machining large-diameter deep holes (the diameter is larger than 26 mm, and the depth is larger than 5 times of the diameter of a tool bit), the deeper the hole is, the more difficult the cooling is, and the more difficult the chip removal is, so that the machining precision of the hole is not high, the technical requirement is difficult to meet, and the production efficiency is low; the hole diameter is big more, and the connection of tool bit and cutter body just needs very good rigidity and intensity, and the tool bit is big more, and the cutter body also can follow corresponding grow, and the more cutter body that needs of specification also can be more, and the purchase cost of cutter body also can increase, and in certain extent, can use the cutter body of different diameter tool bits, just can effectual control purchase cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a modular cutter bar with a replaceable head module, which can realize that a plurality of cutter heads with different diameters are used on the same cutter body, thereby effectively saving the cost, and has the advantages of high drilling precision, long service life of the cutter heads, high processing stability and high production efficiency.

The utility model provides a modular cutter bar with a replaceable head module, which comprises a cutter body and the head module arranged on the cutter body, wherein a cutter head and a blade are arranged on the head module; the cutter body comprises a clamping part and a connecting part, at least one second spiral groove is formed in the surface of the connecting part, and the connecting part is fixedly connected with the head module; the head module comprises a mounting part, and a blade is mounted on the mounting part; the top of head module has seted up the mounting groove, install detachable tool bit in the mounting groove.

In one embodiment of the utility model, a clamping plane is arranged on the surface of the clamping part, one end of the clamping part is provided with an abutting part, one end of the abutting part, which is far away from the clamping part, is provided with a connecting part, the axial leads of the clamping part, the abutting part and the connecting part are the same, a clamping groove is also arranged between the abutting part and the clamping part, and the outer diameter of the clamping groove is smaller than that of the clamping part; the outer diameter of the abutting part is larger than that of the clamping part, and the outer diameter of the abutting part is larger than or equal to that of the connecting part; waist type groove and fourth locating hole have been seted up on the top of connecting portion, the through-hole has been seted up to waist type inslot, the through-hole runs through to the bottom of clamping part.

In an embodiment of the present invention, the head module further comprises a first spiral groove, and the number of the first spiral groove is equal to the number of the second spiral groove; fixed blocks are arranged on two sides of the mounting groove, a second cooling hole is formed in the top end of each fixed block, and the second cooling hole is communicated with the first cooling hole; the side of fixed block has seted up the bridge screw pin hole, and the tool bit passes the bridge screw pin hole through the screw and installs in the mounting groove to it is inconsistent with the fixed block.

In one embodiment of the utility model, the mounting groove comprises a bottom surface, and the bottom surface is vertical to the axial lead of the cutter body; a first positioning surface and a second positioning surface are arranged on one side, close to the mounting groove, of the fixing block, and a tool withdrawal groove is formed between the bottom surfaces of the first positioning surface and the second positioning surface; the number of the fixed blocks, the number of the first positioning surfaces and the number of the second positioning surfaces are two, the two first positioning surfaces are parallel to each other, the two second positioning surfaces are parallel to each other, and the distance between the two first positioning surfaces is equal to the distance between the two second positioning surfaces and equal to the groove width of the mounting groove; the groove width is 5-18 millimeters, and the included angle between the first positioning surface and the second positioning surface is 120-170 degrees.

In one embodiment of the utility model, the gap bridge screw pin hole penetrates through the two first positioning surfaces, an included angle between the axis line of the gap bridge screw pin hole and the first positioning surfaces is 15-45 degrees and is parallel to the bottom surface, and the distance from the hole center of the gap bridge screw pin hole to the bottom surface is 2-12 mm.

In one embodiment of the utility model, the gap bridge screw pin hole comprises a threaded hole and a round pin hole, the threaded hole is located on one of the fixing blocks, the round pin hole is located on the other fixing block, and the axis of the threaded hole is 0 to 0.2 mm higher than the axis of the round pin hole relative to the bottom surface.

In one embodiment of the utility model, a waist-shaped key is arranged at the bottom end of the head module, a first counter sink hole is further formed in the head module, the waist-shaped key is clamped in the waist-shaped groove, and the head module and the cutter body are fastened through a bolt penetrating through the first counter sink hole and a fourth positioning hole; first cooling holes are formed in the waist-shaped keys, third cooling holes are further formed in two sides of the head module, and the first cooling holes, the third cooling holes, the second cooling holes and the through holes are communicated.

In one embodiment of the utility model, the bottom surface of the waist-shaped groove is perpendicular to the axial lead of the cutter body, the length of the waist-shaped groove is 0.5 to 0.9 times of the diameter of the head of the cutter body, the width of the waist-shaped groove is 0.15 to 0.35 times of the diameter of the head of the cutter body, and the depth of the waist-shaped groove is 0.05 to 0.3 times of the diameter of the head of the cutter body.

In one embodiment of the utility model, one end of the second spiral groove extends to the end part of the connecting part close to the abutting part; the other end of the second spiral groove extends to the top end of the connecting part and is intersected with the first spiral groove on the head module.

In an embodiment of the present invention, the waist-shaped groove of the cutter body is in clearance fit with the waist-shaped key of the head module, and the cutter head is also in clearance fit with the mounting groove of the head module.

Advantageous effects

1. The utility model provides a modular cutter bar with a replaceable head module, which can realize that a plurality of cutter heads with different diameters are used on the same cutter body, thereby effectively saving the cost, and has the advantages of high drilling precision, long service life of the cutter heads, high processing stability and high production efficiency.

2. The mounting groove comprises a bottom surface, and the bottom surface is vertical to the axial lead of the cutter body; the one side that the fixed block is close to the mounting groove is equipped with first locating surface and second locating surface, be equipped with the tool withdrawal groove between first locating surface and second locating surface and the bottom surface, the tool withdrawal groove degree of depth is 0 ~ 1 millimeter, and the tool withdrawal groove height equals the distance of gap bridge screw pinhole hole heart to the bottom surface, and the tool bit can be loaded and unloaded in convenient and fast ground in the tool withdrawal groove of setting.

3. The number of the fixed blocks, the number of the first positioning surfaces and the number of the second positioning surfaces are two, the two first positioning surfaces are parallel to each other, the two second positioning surfaces are parallel to each other, and the distance between the two first positioning surfaces is equal to the distance between the two second positioning surfaces and equal to the groove width of the mounting groove; the groove width is 5 ~ 18 millimeters, the contained angle between first locating surface and the second locating surface is 120 ~ 170, and the tool bit can support and lean on first locating surface and second locating surface in order to offset cutting force.

4. The bottom surface of the waist-shaped groove is vertical to the axial lead of the cutter body, the length of the waist-shaped groove is 0.5 to 0.9 times of the diameter of the head of the cutter body, the width of the waist-shaped groove is 0.15 to 0.35 times of the diameter of the head of the cutter body, and the depth of the waist-shaped groove is 0.05 to 0.3 times of the diameter of the head of the cutter body. The length and the width of the waist-shaped groove are too small, the driving effect is poor, and the positioning is unstable; too large a wall thickness too thin to be easily damaged; the depth of the waist-shaped groove is too shallow, and no positioning effect is achieved; too deep increases the difficulty of processing and causes waste.

5. The surface of a cylinder of the clamping part is provided with a clamping plane, one end of the clamping part is provided with a propping part, one end of the propping part, which is far away from the clamping part, is provided with a connecting part, the axial leads of the clamping part, the propping part and the connecting part are the same, a clamping groove is also arranged between the propping part and the clamping part, and the outer diameter of the clamping groove is smaller than that of the clamping part; the outer diameter of the supporting part is larger than that of the clamping part, the outer diameter of the supporting part is larger than or equal to that of the connecting part, the clamping part is fixed on equipment such as a handheld drilling tool, a drilling machine, a milling machine, a lathe or a machining center through the clamping plane and the clamping groove, the supporting part can be fixedly firmer and fastened, the impact resistance of the connecting part is enhanced, and the connecting part is not prone to deformation.

6. One end of the second spiral groove extends to the end part, close to the abutting part, of the connecting part, and the spiral angle of the second spiral groove is 0-20 degrees; the other end of the second spiral groove extends to the top end of the connecting part and intersects with the first spiral groove on the head module, wherein the spiral angle of the second spiral groove is 20-60 degrees. The chip card that can avoid the tool bit cutting to produce through this kind of design is on the fixed block, the slope of fixed block head sets up, guarantees the angle of cutting promptly, makes things convenient for the piece to carry again to first helicla flute and second helicla flute in, and in cutting process, the direction of motion of piece in first helicla flute and second helicla flute changes, makes the piece more easy fracture and discharge.

7. According to the utility model, the third cooling hole, the second cooling hole, the first cooling hole and the through hole are communicated, so that cooling liquid can enter the two sides of the cutter head from the through hole through the third cooling hole and the two inlet and second cooling holes respectively, the effect of cooling the cutter head is realized, the cooling effect is good, the flow of the cooling liquid is stable, and chips can be discharged out of the hole along with the cooling liquid more easily.

8. The diameter of the head module of the present invention ranges from 30 mm to 100 mm. The head module below 30 mm only can use relatively small blades at two sides due to small space of the cutter head, and the small blades are poor in strength and easy to break, so that the head module has no practical use value; and the single blade on both sides of the cutter head with the diameter of more than 100 mm can not meet the drilling requirement.

9. The shape of the tool bit is matched with the mounting groove of the head module, the tool bit is in clearance fit with the head module, and the clearance range is 0.001-0.02 mm on a single side. A gap bridge hole is formed in the cutter head, the cylindrical pin of the screw is in clearance fit with the gap bridge hole of the cutter head, and the clearance range is 0.001-0.1 mm on one side. When the tool bit is installed, the tool bit is placed in the installation groove, is flatly attached to the bottom surface, and is positioned through the two first positioning surfaces, the two second positioning surfaces and the bottom surface. In the process of locking the inner hexagonal screw, the mounting groove deforms towards the axial lead of the cutter body, so that an included angle between the first positioning surface and the second positioning surface ranges from 120 degrees to 170 degrees and can be better attached to the cutter head, and the center of the round pin hole of the gap bridge screw pin hole is lower than that of the threaded hole, so that the cylindrical pin generates downward force to enable the bottom surface of the cutter head to be more fully attached to the bottom surface of the mounting groove, the head-following module of the cutter head is very reliably locked, and the cutter head can be more conveniently replaced by the radial locking mode, and the quick change of the cutter head is realized.

10. The head module is a middle connecting piece of the cutter head and the cutter body, the head module is in a modular design, the diameter of the head module is 1-1.1 times of the diameter of the head of the cutter body, and the waist keys of the head module in the range are completely the same in size, so that the cutter heads with different diameters can be used on the same cutter body, and the cost is effectively saved. When the head module is installed, the waist-shaped key is placed in the waist-shaped groove, the side surface of the key groove is used for positioning, the bottom surface of the head module is attached to the top surface of the cutter body, and the head module is fixed by locking the inner hexagonal screw, so that the connection between the head module and the cutter body has very good strength and rigidity; ISO standard blades are installed on installation parts on two sides of the head module, and replaceable tool bits are installed on installation grooves above the head module. First helicla flute and second helicla flute can effectual assurance chip removal, and four cooling holes on the head module can be fine cool off to reach the high accuracy to the major diameter deep hole, high efficiency processing.

Drawings

Fig. 1 is an exploded view of a modular blade bar of the interchangeable head module of the present invention.

Fig. 2 is an exploded view of a modular blade bar of the interchangeable head module of the present invention from yet another perspective.

Fig. 3 is an exploded view of a modular blade bar of the interchangeable head module of the present invention from yet another perspective.

Fig. 4 is a front view of a modular tool bar of the interchangeable head module of the present invention.

Fig. 5 is a perspective view of the head module of the present invention.

Fig. 6 is a perspective view of a head module of the present invention from yet another perspective.

Wherein: 1. a head module; 11. a first counter sink hole; 12. a waist-shaped key; 13. a first cooling hole; 14. a fixed block; 141. a first positioning surface; 142. a second positioning surface; 143. a gap bridge screw pin hole; 144. a second cooling hole; 15. mounting grooves; 151. a bottom surface; 16. a first helical groove; 17. an installation part; 171. a third positioning hole; 18. a third cooling hole; 2. a cutter body; 21. clamping a plane; 22. a through hole; 23. a card slot; 24. an abutting portion; 25. a connecting portion; 26. a second helical groove; 27. a waist-shaped groove; 28. a clamping portion; 29. and a fourth positioning hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The terms "inner" and "outer" are used to refer to directions toward and away from, respectively, the geometric center of a particular component.

Example 1

A modular cutter bar with replaceable head modules is disclosed, as shown in figures 1-6, and comprises a cutter body 2 and a head module 1 arranged on the cutter body 2, wherein a cutter head and a blade are arranged on the head module 1; the cutter body 2 comprises a clamping portion 28 and a connecting portion 25, at least one second spiral groove 26 is formed in the surface of the connecting portion 25, a waist-shaped groove 27 and a fourth positioning hole 29 are formed in the top end of the connecting portion 25, a through hole 22 is formed in the waist-shaped groove 27, the through hole 22 penetrates through the bottom end of the clamping portion 28, the diameter of the through hole 22 is 0.1-0.4 times of the diameter of the head portion of the cutter body 2, and the head portion of the cutter body 2 is the end, close to the head module 1, of the connecting portion 25.

The head module 1 comprises a first spiral groove 16 and mounting parts 17, the mounting parts 17 are positioned at two sides of the head module 1, ISO standard blades are mounted on the mounting parts 17, and the number of the first spiral groove 16 is equal to that of the second spiral grooves 26; the top end of the head module 1 is provided with a mounting groove 15, two sides of the mounting groove 15 are provided with fixed blocks 14, the top end of each fixed block 14 is provided with a second cooling hole 144, and the second cooling holes 144 are communicated with the first cooling holes 13; a gap bridge screw pin hole 143 is formed in the side edge of the fixing block 14, and the cutter head passes through the gap bridge screw pin hole 143 through a screw to be installed in the installation groove 15 and is abutted to the fixing block 14; the mounting groove 15 comprises a bottom surface 151, and the bottom surface 151 is perpendicular to the axial lead of the cutter body 2; one side of the fixing block 14 close to the mounting groove 15 is provided with a first positioning surface 141 and a second positioning surface 142, a tool withdrawal groove is arranged between the first positioning surface 141 and the bottom surface 151 and between the second positioning surface 142 and the bottom surface 151, the depth of the tool withdrawal groove is 0-1 mm, the height of the tool withdrawal groove is equal to the distance from the hole center of the gap bridge screw hole 143 to the bottom surface, and the tool bit can be conveniently and quickly assembled and disassembled through the arranged tool withdrawal groove.

Further, the number of the fixed block 14, the first positioning surfaces 141 and the second positioning surfaces 142 is two, the two first positioning surfaces 141 are parallel to each other, the two second positioning surfaces 142 are parallel to each other, and the distance between the two first positioning surfaces 141 and the distance between the two second positioning surfaces 142 are equal and equal to the width of the mounting groove 15; the groove width is 5-18 mm, the included angle between the first positioning surface 141 and the second positioning surface 142 is 120-170 degrees, and the tool bit can abut against the first positioning surface 141 and the second positioning surface 142 to offset cutting force.

Further, the gap bridge screw pin hole 143 penetrates through the two first positioning surfaces 141, an included angle between the axis of the gap bridge screw pin hole 143 and the first positioning surface 141 is 15-45 degrees and is parallel to the bottom surface 151, the distance from the hole center of the gap bridge screw pin hole 143 to the bottom surface 151 is 2-12 mm, the gap bridge screw pin hole 143 comprises a threaded hole and a round pin hole, the threaded hole is located on one of the fixing blocks 14, and the round pin hole is located on the other fixing block 14. The diameter of the threaded hole is M2-M10, the diameter of the round pin hole is 2-12 mm, a chamfer of 1-10 mm multiplied by 5 degrees-30 degrees is arranged at the orifice of the round pin hole, and the center of the threaded hole is 0-0.2 mm higher than the round pin hole and the chamfer center of the orifice of the round pin hole relative to the bottom surface 151 along the axial lead direction.

Further, a waist-shaped key 12 is arranged at the bottom end of the head module 1, a first counter sink hole 11 is further formed in the head module 1, the waist-shaped key 12 is matched with the waist-shaped groove 27, the waist-shaped key 12 is clamped in the waist-shaped groove 27, and the head module 1 and the cutter body 2 are fastened through bolts penetrating through the first counter sink hole 11 and the fourth positioning hole 29. The bottom surface of the waist-shaped groove 27 is perpendicular to the axial lead of the cutter body 2, the length of the waist-shaped groove 27 is 0.5 to 0.9 times of the diameter of the head of the cutter body 2, the width of the waist-shaped groove 27 is 0.15 to 0.35 times of the diameter of the head of the cutter body 2, and the depth of the waist-shaped groove 27 is 0.05 to 0.3 times of the diameter of the head of the cutter body 2. The length and the width of the waist-shaped groove 27 are too small, the driving effect is poor, and the positioning is unstable; too large a wall thickness too thin to be easily damaged; the depth of the waist-shaped groove 27 is too shallow, and no positioning effect is achieved; too deep increases the difficulty of processing and causes waste.

Further, the number of the fourth positioning holes 29 is two, the diameters of the two fourth positioning holes 29 are M2 to M12, and an included angle between the center line of the waist-shaped groove 27 and a connecting line of the two fourth positioning holes 29 is 0 ° to 45 °.

Further, the clamping portion 28 is a cylinder, a through hole 22 is formed in the bottom of the clamping portion 28, a clamping plane 21 is formed in the cylinder surface of the clamping portion 28, an abutting portion 24 is formed at one end of the clamping portion 28, a connecting portion 25 is formed at one end, away from the clamping portion 28, of the abutting portion 24, axial lines of the clamping portion 28, the abutting portion 24 and the connecting portion 25 are the same, a clamping groove 23 is further formed between the abutting portion 24 and the clamping portion 28, and the outer diameter of the clamping groove 23 is smaller than the outer diameter of the clamping portion 28; the outer diameter of the abutting portion 24 is larger than that of the clamping portion 28, the outer diameter of the abutting portion 24 is larger than or equal to that of the connecting portion 25, the clamping portion 28 is fixed on equipment such as a handheld drilling tool, a drilling machine, a milling machine, a lathe or a machining center through the clamping plane 21 and the clamping groove 23, the clamping portion 28 can be fixed more firmly and tightly through the abutting portion 24, the impact resistance of the connecting portion 25 is enhanced, and the connecting portion 25 is not prone to deformation.

Further, one end of the second spiral groove 26 extends to the end of the connecting portion 25 close to the abutting portion 24, where the spiral angle of the second spiral groove 26 is 0 ° to 20 °; the other end of the second helical groove 26 extends to the top end of the connection portion 25 and intersects the first helical groove 16 on the head module 1, where the helix angle of the second helical groove 26 is 20 ° to 60 °. Through this kind of design can avoid the piece card that the tool bit cutting produced on fixed block 14, the slope of fixed block 14 head sets up, guarantees the angle of cutting promptly, makes things convenient for the piece to carry again to first helicla flute 16 and second helicla flute 26 in, and in the cutting process, the piece changes in the direction of motion of first helicla flute 16 and second helicla flute 26, makes the piece more easy fracture and discharge.

Further, first cooling hole 13 has been seted up in waist type key 12, third cooling hole 18 has still been seted up to the both sides of head module 1, first cooling hole 13, third cooling hole 18, second cooling hole 144 and through-hole 22 all communicate, can make the coolant liquid enter into the both sides of tool bit through third cooling hole 18 and two second cooling holes 144 respectively from through-hole 22, realize carrying out cooling's effect to the tool bit, and the cooling effect is good, and the coolant liquid flow is stable, makes the piece more easily follow the coolant liquid and discharge the hole outside together.

Further, a third positioning hole 171 is formed in the mounting portion 17, and the ISO standard insert is fixedly connected to the mounting portion 17 through the third positioning hole 171.

Further, the diameter of the head module 1 ranges from 30 mm to 100 mm. The head module 1 with the size of less than 30 mm only can use relatively small blades on two sides due to small space of a cutter head, and the small blades are poor in strength and easy to break, so that the head module has no practical use value; and the single blade on both sides of the cutter head with the diameter of more than 100 mm can not meet the drilling requirement.

Further, the height of the head module 1 is 0.5 to 1.5 times the diameter of the head module 1.

Further, the waist-shaped groove 27 of the cutter body 2 is in clearance fit with the waist-shaped key 12 of the head module 1, and the clearance range is 0.001-0.02 mm on one side; the depth of the waist-shaped groove 27 is 0.5 to 1 mm deeper than the height of the waist-shaped key 12.

Further, the shape of tool bit suits with mounting groove 15 of head module 1, and the tool bit is clearance fit with head module 1, and the clearance scope is unilateral 0.001 to 0.02 millimeter. A gap bridge hole is formed in the cutter head, the cylindrical pin of the screw is in clearance fit with the gap bridge hole of the cutter head, and the clearance range is 0.001-0.1 mm on one side. When the tool bit is installed, the tool bit is placed in the installation groove 15, is flush with the bottom surface 151, and is positioned by the two first positioning surfaces 141, the two second positioning surfaces 142 and the bottom surface 151. In the process of locking the socket head cap screws, the mounting groove 15 deforms towards the axial lead of the cutter body 2, so that the included angle between the first positioning surface 141 and the second positioning surface 142 is 120-170 degrees, and the first positioning surface can be better attached to the cutter head, and the center of the round pin hole of the gap bridge screw pin hole 143 is lower than that of the threaded hole, so that the cylindrical pin generates a downward force, the bottom surface of the cutter head can be more fully attached to the bottom surface 151 of the mounting groove 15, the cutter head and head module 1 can be reliably locked, and the cutter head can be more conveniently replaced by the radial locking mode, and the quick change of the cutter head is realized.

Further, the head module 1 is an intermediate connecting piece between the cutter head and the cutter body 2, the head module 1 is in a modular design, the diameter of the head module 1 is 1-1.1 times of the diameter of the head of the cutter body 2, and the waist-shaped keys 12 of the head module 1 are identical in size in the range, so that the cutter heads with different diameters can be used on the same cutter body 2, and cost is effectively saved. When the head module 1 is installed, the waist-shaped key 12 is placed in the waist-shaped groove 27, the side surface of the key groove is used for positioning, the bottom surface of the head module 1 is attached to the top surface of the cutter body 2, and the head module 1 is fixed by locking the inner hexagonal screw, so that the connection between the head module 1 and the cutter body 2 has very good strength and rigidity; ISO standard blades are mounted on mounting portions 17 on both sides of the head module 1, and replaceable cutter bits are mounted on mounting grooves 15 above the head module 1. The first spiral groove 16 and the second spiral groove 26 can effectively guarantee chip removal, and four cooling holes in the head module 1 can be cooled well, so that high-precision and high-efficiency machining of large-diameter deep holes is achieved.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents may be substituted for elements thereof without departing from the scope of the utility model.

Claims

1. The modular cutter bar with the replaceable head module is characterized by comprising a cutter body (2) and the head module (1) arranged on the cutter body (2), wherein a cutter head and a blade are arranged on the head module (1); the cutter body (2) comprises a clamping part (28) and a connecting part (25), at least one second spiral groove (26) is formed in the surface of the connecting part (25), and the connecting part (25) is fixedly connected with the head module (1); the head module (1) comprises a mounting part (17), and a blade is mounted on the mounting part (17); mounting groove (15) have been seted up on the top of head module (1), install detachable tool bit in mounting groove (15).

2. The modular cutter bar with the replaceable head module as claimed in claim 1, wherein a clamping plane (21) is formed on the surface of the clamping portion (28), an abutting portion (24) is arranged at one end of the clamping portion (28), a connecting portion (25) is arranged at one end, away from the clamping portion (28), of the abutting portion (24), the axial lines of the clamping portion (28), the abutting portion (24) and the connecting portion (25) are the same, a clamping groove (23) is further arranged between the abutting portion (24) and the clamping portion (28), and the outer diameter of the clamping groove (23) is smaller than that of the clamping portion (28); the outer diameter of the abutting part (24) is larger than that of the clamping part (28), and the outer diameter of the abutting part (24) is larger than or equal to that of the connecting part (25); waist-shaped groove (27) and fourth locating hole (29) have been seted up on the top of connecting portion (25), through-hole (22) have been seted up in waist-shaped groove (27), through-hole (22) run through to the bottom of clamping part (28).

3. Modular tool bar of replaceable head modules according to claim 2, characterized in that the head module (1) further comprises a first helical groove (16), the number of the first helical groove (16) and the number of the second helical groove (26) being equal; fixed blocks (14) are arranged on two sides of the mounting groove (15), a second cooling hole (144) is formed in the top end of each fixed block (14), and the second cooling holes (144) are communicated with the first cooling holes (13); a gap bridge screw pin hole (143) is formed in the side edge of the fixing block (14), and the cutter head penetrates through the gap bridge screw pin hole (143) through a screw to be installed in the installation groove (15) and is abutted to the fixing block (14).

4. Modular tool bar of interchangeable head modules according to claim 3, characterized in that the mounting groove (15) comprises a bottom surface (151), the bottom surface (151) being perpendicular to the axis of the tool body (2); a first positioning surface (141) and a second positioning surface (142) are arranged on one side, close to the mounting groove (15), of the fixing block (14), and a tool withdrawal groove is formed between the bottom surface (151) and the first positioning surface (141) and the second positioning surface (142); the number of the fixed block (14), the number of the first positioning surfaces (141) and the number of the second positioning surfaces (142) are two, the two first positioning surfaces (141) are parallel to each other, the two second positioning surfaces (142) are parallel to each other, and the distance between the two first positioning surfaces (141) is equal to the distance between the two second positioning surfaces (142) and is equal to the groove width of the mounting groove (15); the groove width is 5-18 mm, and an included angle between the first positioning surface (141) and the second positioning surface (142) is 120-170 degrees.

5. The modular cutter bar with the replaceable head module as claimed in claim 4, wherein the gap bridge screw pin hole (143) penetrates through the two first positioning surfaces (141), the included angle between the axis of the gap bridge screw pin hole (143) and the first positioning surfaces (141) is 15-45 degrees, the included angle is parallel to the bottom surface (151), and the distance from the hole center of the gap bridge screw pin hole (143) to the bottom surface (151) is 2-12 mm.

6. Modular tool bar of interchangeable head modules according to claim 5, characterized in that the gap screw hole (143) comprises a threaded hole on one of the fixed blocks (14) and a round pin hole on the other fixed block (14), the axis of the threaded hole being 0 to 0.2 mm higher than the axis of the round pin hole with respect to the bottom surface (151).

7. The modular cutter arbor with replaceable head module according to claim 6, characterized in that the head module (1) is provided with a waist-shaped key (12) at the bottom end, the head module (1) is further provided with a first counter sink hole (11), the waist-shaped key (12) is clamped in the waist-shaped groove (27), and the head module (1) and the cutter body (2) are fastened through the first counter sink hole (11) and a fourth positioning hole (29) by bolts; first cooling holes (13) are formed in the waist-shaped key (12), third cooling holes (18) are further formed in two sides of the head module (1), and the first cooling holes (13), the third cooling holes (18), the second cooling holes (144) and the through holes (22) are communicated.

8. The modular toolholder of an interchangeable head module according to claim 7, wherein the bottom surface of the waist-shaped groove (27) is perpendicular to the axis of the toolholder (2), the length of the waist-shaped groove (27) is 0.5 to 0.9 times the diameter of the toolholder (2) head, the width of the waist-shaped groove (27) is 0.15 to 0.35 times the diameter of the toolholder (2) head, and the depth of the waist-shaped groove (27) is 0.05 to 0.3 times the diameter of the toolholder (2) head.

9. Modular knife bar of an interchangeable head module according to claim 8, characterized in that one end of the second helical groove (26) extends to the end of the connecting portion (25) close to the abutment (24); the other end of the second spiral groove (26) extends to the top end of the connecting part (25) and intersects with the first spiral groove (16) on the head module (1).

10. Modular tool bar with exchangeable head modules according to any of claims 1 to 9, characterized in that the kidney-shaped slot (27) of the tool body (2) is a clearance fit with the kidney-shaped key (12) of the head module (1), and the tool head is also a clearance fit with the mounting slot (15) of the head module (1).