CN116060670A

CN116060670A - Drilling tool device for improving roughness of hole wall of large hole of automobile plate

Info

Publication number: CN116060670A
Application number: CN202310210060.5A
Authority: CN
Inventors: 龚平; 宋善磊; 张建; 孙伟鹏
Original assignee: Ji'an Shengyi Electronics Co ltd
Current assignee: Ji'an Shengyi Electronics Co ltd
Priority date: 2023-03-07
Filing date: 2023-03-07
Publication date: 2023-05-05

Abstract

The invention discloses a drilling tool device for improving the roughness of the hole wall of a large hole of an automobile plate, which belongs to the technical field of ST drilling tool manufacture and particularly relates to a drilling tool device for improving the roughness of the hole wall of the large hole of an automobile plate, comprising a drill rod, a splayed tool head and a splayed tool tail, wherein the splayed tool head and the splayed tool tail are respectively connected with the top and the splayed tool tail of the drill rod, two groups of liquid holes are symmetrically arranged on the side wall of the top of the drill rod, and a through hole is arranged in the middle of the drill rod.

Description

Drilling tool device for improving roughness of hole wall of large hole of automobile plate

Technical Field

The invention relates to the technical field of ST drilling tool manufacturing, in particular to a drilling tool device for improving roughness of a hole wall of a large hole of an automobile plate.

Background

Controlling the roughness of the macroporous hole wall of the automobile plate can effectively improve the turbulence intensity of fluid in the hole, improve the fluid flow characteristic, increase the mixing efficiency, effectively improve the problem of fluid separation at the upstream and downstream of the hole wall, reduce the influence of fluid retention along the hole wall on the flow velocity in the hole, improve the fluid flow characteristic in the hole, improve the roughness of the surface of the non-open type fluid, improve the rapid distribution performance of the fluid on the rough surface of the hole wall, thereby better realizing the efficient and heat transmission, improving the thermal mass balance of the hole wall and the heat transfer medium, improving and adjusting the temperature field distribution on the hole wall, reducing the problem of uneven furnace temperature on the surface of the hole wall and reducing noise;

the roughness control of the hole wall of the large hole is not tight by the common PCB, but the quality requirement of part of automobile boards on the hole wall of the large hole is strict, the requirement is less than 50um and even less than 35um, the existing conventional ST large-diameter drilling tool cannot meet the requirement, so that the hole is too large after the machining is finished, and in the process of the conventional ST large-diameter drilling tool, the phenomenon of copper residue and gold loading in the hole caused by the too large hole thickness of the NPTH hole in the process of a subtractive method affects the overall electrical performance and appearance of the PCB;

therefore, it is necessary to invent a drilling tool device for improving the roughness of the hole wall of the large hole of the automobile plate.

Disclosure of Invention

Therefore, the invention provides the drilling tool device for improving the roughness of the hole wall of the large hole of the automobile plate, which reduces the contact area between the tool and the hole wall, so that the cutting is sharper in drilling, the heating of the drilling tool is lower, the damage of resin and glass front on the hole wall by mechanical force is smaller, the quality effects of lower hole wall roughness and less residual copper in the hole wall are achieved, and the problems of overlarge hole thickness and residual copper and gold loading in the hole caused by overlarge hole thickness after the existing ST large-diameter drilling tool is processed are solved.

In order to achieve the above object, the present invention provides the following technical solutions: the drilling tool device comprises a drill rod, a splayed tool head and a tail handle, wherein the splayed tool head and the tail handle are respectively connected with the top and the tail of the drill rod, two groups of liquid outlet holes are formed in the side wall of the top of the drill rod and are symmetrically arranged, a through hole is formed in the middle of the drill rod, two groups of threaded holes are formed in the side wall of the top of the drill rod and are symmetrically arranged, and the two groups of threaded holes are communicated with the through hole and are in T-shaped arrangement;

the splayed cutter head comprises a limiting rod, spherical grooves are formed in two sides of the limiting rod, the two groups of spherical grooves are symmetrically arranged, the limiting rod is spliced with the through hole and the side wall of the limiting rod is tightly attached, the two groups of spherical grooves are respectively communicated with the two groups of threaded holes, screws are arranged in the two groups of threaded holes, and the two groups of screws are respectively matched with the two groups of spherical grooves;

the utility model discloses a cutting edge, including the gag lever post, the gag lever post top is equipped with the main cutting edge, the main cutting edge is the concentric setting with the gag lever post, the main cutting edge lateral wall is equipped with two sets of main cutting faces that are the central symmetry setting, two sets of main cutting face intersection department is provided with interior straight edge, interior straight edge is provided with the chisel edge with main cutting edge intersection point department.

Preferably, chip grooves are formed in two side walls of the drill rod, the two chip grooves are symmetrically arranged, the two main cutting faces are intersected with the two chip grooves, a tool back is arranged between the two chip grooves, limiting grooves are formed in two sides of the top of the drill rod, the two chip grooves extend upwards and are communicated with the two limiting grooves, a lug is fixedly arranged at the top of the tool back, and the top of the lug is in seamless connection with the bottom of the splayed tool head.

Preferably, the TIN coating is coated on the surface of the knife back, the cutting edge is arranged at the joint of the knife back and the chip groove, the diversion trenches are respectively arranged at the two sides of the knife back, and the two diversion trenches are respectively communicated with the two sets of liquid outlet holes.

Preferably, the utility model discloses a cutting edge cutting device, including the cutting edge, the cutting edge is provided with the cutting edge, the main cutting edge both sides are provided with the rake face that is central symmetry setting, the rake face is connected with the spacing groove inner wall, main cutting edge and rake face junction are provided with the flank face, the rake face is set up to the minor cutting face with the margin intersection line, minor cutting face one side sets up to the minor cutting edge.

Preferably, two groups of liquid inlet holes are formed in the top of the tail handle, and the two groups of liquid inlet holes are respectively communicated with the two groups of liquid outlet holes.

The beneficial effects of the invention are as follows:

the two groups of inner straight edges incline to reduce the front angle of the inner straight edges, strengthen the centering effect of the drill bit, prevent the hole position from shifting, avoid the phenomenon of unstable centering generated in drilling, and the drill bit is trembled, shorten the length of the chisel edge to be a centering point, reduce the pressure and cut more easily during processing, the centering means that the squatting pit is not needed, each hole is not needed to be processed to center the hole, a great deal of cycle time can be saved, the main cutting surface is a surface generated after the main cutting edge is ground, the auxiliary cutting surface is a surface generated after the auxiliary cutting edge is ground, the main cutting edge has the effect of directly participating in metal cutting, and the auxiliary cutting edge has the effect of grinding the processed hole wall and plays a guiding role together with the cutting edge to ensure certain surface roughness;

the drill rod is made of hard alloy, so that the feeding motion of the drill rod is improved, the service life of the drill rod is prolonged, the TIN coating has the effect of improving the hardness and heat resistance of the back of the cutter, the cutting edge has the effect of guiding scraps in a smooth hole, the liquid outlet hole has the effect of spraying cooling liquid to the splayed cutter head, and therefore the temperature during cutting is reduced, the cutter is lubricated and chip removal is facilitated, the cooling liquid has the effect of keeping the sharpness of the main cutting edge, the temperature of the splayed cutter head is reduced, the damage of the drill head is avoided, and the use and the precision are influenced;

the motor is used for driving the drill rod to rotate, so that the drill rod drives the splayed cutter head at the front end to rotate, the main cutting edges are used for punching a workpiece, and as the two main cutting edges are symmetrically arranged, only one main cutting edge on the splayed cutter head is always in contact with the workpiece during cutting, the contact area of the cutter and the hole wall is reduced, the cutting during drilling is sharper, the heating of the drill is lower, the damage of resin and glass front on the hole wall by mechanical force is smaller, and therefore the quality effects of lower roughness of the hole wall and less residual copper in the hole wall are achieved.

Drawings

FIG. 1 is a schematic view of the structure of the drill provided by the invention;

FIG. 2 is a view of the mounting positions of the liquid outlet hole and the threaded hole provided by the invention;

FIG. 3 is a top plan view of the drill provided by the present invention;

FIG. 4 is an enlarged view of the portion A of FIG. 1 provided by the present invention;

FIG. 5 is a schematic view of an installation structure of the splayed cutter head provided by the invention;

FIG. 6 is a view of the mounting position of the splayed cutter head provided by the invention;

FIG. 7 is a sectional view of an installation of the splayed cutting head provided by the present invention;

FIG. 8 is a diagram of the installation position of the diversion trench provided by the invention;

fig. 9 is a top view of a tail shank provided by the present invention.

In the figure: drill pipe 100, back 110, TIN coating 120, junk slot 130, land 140, guide slot 150, drain hole 151, limit slot 160, bump 161, threaded hole 170, screw 171, through hole 180, octagon head 200, limit rod 210, ball-shaped slot 211, main cutting edge 220, main cutting face 221, relief face 230, rake face 240, minor cutting edge 250, minor cutting face 251, inner straight edge 260, chisel edge 270, shank 300, and drain hole 310.

Description of the embodiments

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.

Referring to fig. 1-9, the drilling tool device for improving the roughness of the hole wall of the large hole of the automobile plate provided by the invention comprises a drill rod 100, an eight-shaped tool bit 200 and a tail handle 300, wherein the eight-shaped tool bit 200 and the tail handle 300 are respectively connected with the top and the tail of the drill rod 100, two groups of liquid outlet holes 151 are formed in the side wall of the top of the drill rod 100 and are symmetrically arranged, the liquid outlet holes 151 have the function of spraying cooling liquid to the eight-shaped tool bit 200, so that the temperature during cutting is reduced, the lubrication of the tool and the chip removal are facilitated, the cooling liquid has the function of keeping the sharpness of a main cutting edge 220, the temperature of the eight-shaped tool bit 200 is reduced, the damage of a drill bit is avoided, the use and the precision are influenced, a through hole 180 is formed in the middle part of the drill rod 100, two groups of threaded holes 170 are formed in the side wall of the top of the drill rod 100 and are symmetrically arranged, the two groups of threaded holes 170 are communicated with the through hole 180 and are symmetrically arranged, and the drill rod 100 is particularly, the drill rod 100 adopts hard alloy as a material, and the feeding movement of the drill rod 100 is improved, and the service life of the drill rod 100 is prolonged;

the splayed tool bit 200 comprises a limiting rod 210, spherical grooves 211 are formed in two sides of the limiting rod 210, the two groups of spherical grooves 211 are symmetrically arranged, the limiting rod 210 is spliced with a through hole 180, the side walls of the limiting rod are tightly attached, the two groups of spherical grooves 211 are respectively communicated with two groups of threaded holes 170, screws 171 are arranged in the two groups of threaded holes 170, the two groups of screws 171 are respectively matched with the two groups of spherical grooves 211 for use, and specifically, the splayed tool bit 200 can be mounted on a drill rod 100 by matching the screws 171 with the spherical grooves 211, so that the splayed tool bit 200 is in sealed seamless connection with the drill rod 100, and the splayed tool bit 200 can be freely selected according to holes needing to be punched;

the top of the limiting rod 210 is provided with a main cutting edge 220, the main cutting edge 220 and the limiting rod 210 are concentrically arranged, the side wall of the main cutting edge 220 is provided with two groups of main cutting surfaces 221 which are arranged in a central symmetry mode, the intersection of the two groups of main cutting surfaces 221 is provided with an inner straight edge 260, the inclination of the two groups of inner straight edges 260 reduces the front angle of the inner straight edge 260, the centering effect of the drill bit is enhanced, the hole site is prevented from shifting, the phenomenon of unstable centering caused in drilling is avoided, the phenomenon of shivering of the drill bit is avoided, the length of the chisel edge is shortened to form a centering point, the pressure is smaller during machining, the centering means that a squatting pit is not needed, a centering hole is not needed to be machined in each hole, a large amount of circulation time can be saved, in particular, the main cutting surface 221 is a surface generated after the main cutting edge 220 is polished, and the main cutting edge 220 has the effect of directly taking part in metal cutting.

Further, chip grooves 130 are formed in two side walls of the drill rod 100, the two chip grooves 130 are symmetrically arranged, two groups of main cutting surfaces 221 are intersected with the two groups of chip grooves 130 respectively, waste chips generated by drilling can be driven to be discharged from the chip grooves 130 after cooling liquid is sprayed out from a liquid outlet 151, a tool back 110 is arranged between the two groups of chip grooves 130, limiting grooves 160 are formed in two sides of the top of the drill rod 100, the two groups of chip grooves 130 extend upwards to be communicated with the two groups of limiting grooves 160 respectively, a lug 161 is fixedly arranged at the top of the tool back 110, and the top of the lug 161 is in seamless connection with the bottom of the eight-shaped tool bit 200.

Further, the TIN coating 120 is coated on the surface of the back 110, the connecting part of the back 110 and the junk slot 130 is provided with a cutting edge 140, both sides of the back 110 are provided with guide grooves 150, the two sets of guide grooves 150 are respectively communicated with the two sets of liquid outlet holes 151, specifically, the TIN coating 120 has the function of improving the hardness and heat resistance of the back 110, and the cutting edge 140 has the function of guiding scraps in the light holes.

Further, the rake faces 240 are symmetrically arranged at two sides of the main cutting edge 220, the rake faces 240 are connected with the inner wall of the limit groove 160, the rear rake faces 230 are arranged at the connection part of the main cutting edge 220 and the rake faces 240, the intersecting line of the rake faces 240 and the cutting margin 113 is set to be a secondary cutting face 251, one side of the secondary cutting face 251 is set to be a secondary cutting edge 250, the secondary cutting face 250 is a face generated after the secondary cutting edge 251 is polished, and the secondary cutting face 250 is a face generated after the secondary cutting edge 251 is polished.

Further, two sets of liquid inlet holes 310 are formed at the top of the tail handle 300, and the two sets of liquid inlet holes 310 are respectively communicated with the two sets of liquid outlet holes 151.

The application process of the invention is as follows: when the invention is used, a worker in the field needs to install the splayed cutter head 200 on the drill rod 100 according to the installation mode of the specification of fig. 5 and the specification of fig. 7, and the three coordinate system directions of the splayed cutter head 200 are tightly installed on the drill rod 100 by screwing the screw 171, so that the splayed cutter head 200 cannot relatively move with the drill rod 100 during processing;

after the installation is finished, the splayed tool bit 200 is placed on a selected station, meanwhile, the motor is used for driving the drill rod 100 to rotate, so that the drill rod 100 drives the splayed tool bit 200 at the front end to rotate, and the main cutting edges 220 are used for punching a workpiece.

While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides an improve boring cutter device of car board macropore pore wall roughness, includes drilling rod (100), splayed tool bit (200) and tail handle (300) respectively with drilling rod (100) top and afterbody connection, its characterized in that: two groups of liquid outlet holes (151) are formed in the side wall of the top of the drill rod (100), the two groups of liquid outlet holes (151) are symmetrically arranged, a through hole (180) is formed in the middle of the drill rod (100), two groups of threaded holes (170) are formed in the side wall of the top of the drill rod (100), the two groups of threaded holes (170) are symmetrically arranged, and the two groups of threaded holes (170) are communicated with the through hole (180) and are in T-shaped arrangement;

the splayed cutter head (200) comprises a limiting rod (210), spherical grooves (211) are formed in two sides of the limiting rod (210) and are symmetrically arranged, the limiting rod (210) is inserted into a through hole (180) and the side walls of the limiting rod are tightly attached, the two spherical grooves (211) are respectively communicated with two groups of threaded holes (170), screws (171) are respectively arranged in the two groups of threaded holes (170), and the two groups of screws (171) are respectively matched with the two groups of spherical grooves (211);

the utility model discloses a limiting rod, including limiting rod (210), main cutting edge (220), limiting rod (210), main cutting edge (220) and limiting rod (210) are equipped with main cutting face (221), two sets of main cutting face (221) intersection department is provided with interior straight sword (260), interior straight sword (260) are provided with chisel edge (270) with main cutting edge (220) intersection point department to be the concentric setting of main cutting edge (220) lateral wall.

2. The drilling tool device for improving roughness of a macroporous wall of an automobile plate according to claim 1, wherein: the utility model discloses a drill rod, including drilling rod (100) and main cutting face (221), drilling rod (100) both sides wall all is equipped with junk slot (130) and two sets of junk slot (130) and is the symmetry setting, two sets of main cutting face (221) respectively with two sets of junk slots (130) intersect, two sets of be provided with back of a knife (110) between junk slot (130), spacing groove (160) have all been seted up to drilling rod (100) top both sides, two sets of junk slot (130) upwards extend respectively and two sets of spacing groove (160) intercommunication, back of a knife (110) top fixed mounting has lug (161), lug (161) top and eight characters type cutter head (200) bottom jointless quality.

3. The drilling tool device for improving roughness of the walls of large holes of automobile panels according to claim 2, wherein: the utility model discloses a knife back, including back (110) and guiding gutter, back (110) surface scribbles and is equipped with TIN coating (120), back (110) and chip groove (130) junction has seted up cutting edge (140), guiding gutter (150) have all been seted up to back (110) both sides, two sets of guiding gutter (150) are linked together with two sets of drain hole (151) respectively.

4. The drilling tool device for improving roughness of a macroporous wall of an automobile plate according to claim 1, wherein: the utility model discloses a cutting edge, including cutting edge (113), cutting edge (240), front cutting face (240), limit groove (160) inner wall connection, front cutting edge (220) and front cutting face (240) junction is provided with back cutting face (230), front cutting face (240) are provided with front cutting face (240) both sides are being the centrosymmetric rake face (240) that set up, pair cutting face (251) one side sets up to pair cutting edge (250).

5. The drilling tool device for improving roughness of a macroporous wall of an automobile plate according to claim 1, wherein: two groups of liquid inlet holes (310) are formed in the top of the tail handle (300), and the two groups of liquid inlet holes (310) are respectively communicated with the two groups of liquid outlet holes (151).