阅读说明：本技术 钻尾螺丝及其加工工艺 (Self-drilling screw and processing technology thereof ) 是由 屠乾宏 陈俭 张勇 祝建华 于 2020-04-25 设计创作，主要内容包括：本发明公开了一种钻尾螺丝及其加工工艺,涉及紧固件技术领域,其技术方案要点是包括盘头和垂直固定在盘头一侧的螺杆,盘头的侧壁沿盘头的圆周方向均匀开设有若干的辅助孔。本发明能够在螺丝的盼头出现磨平的情况下,方便继续对螺丝进行拆卸。(The invention discloses a self-drilling screw and a processing technology thereof, relating to the technical field of fasteners. The screw can be conveniently and continuously disassembled under the condition that the expected head of the screw is ground.)

1. The utility model provides a self-drilling screw, includes coiled hair (1) and vertical fixation screw rod (2) in coiled hair (1) one side, its characterized in that: the side wall of the pan head (1) is evenly provided with a plurality of auxiliary holes (12) along the circumferential direction of the pan head (1).

2. The self-drilling screw of claim 1, wherein: the auxiliary holes (12) are obliquely arranged, and the slope of one end close to the outer side is high.

3. A self-drilling screw processing technology is characterized in that: the method for machining the self-drilling screw of claim 2, comprising the steps of:

the method comprises the following steps: carrying out rough drawing, namely carrying out rough drawing treatment on the steel wire through a wire drawing machine;

step two: annealing treatment, namely placing the steel wire subjected to rough drawing into a convection type spheroidizing annealing furnace for annealing;

step three: acid pickling and phosphating, namely, sequentially passing the steel wire through a pickling tank and a phosphating tank to carry out acid pickling and phosphating on the steel wire;

step four: a fine drawing process, wherein the steel wire after acid pickling and phosphorization is subjected to secondary drawing treatment through drawing;

step five: a heading process, wherein heading treatment is carried out on the steel wire after the secondary wire drawing is finished through a heading machine;

step six: a punching step of punching an auxiliary hole (12) in the pan head (1) of the screw by a punching device;

step seven: a tail clamping procedure, namely clamping the tail of the screw rod (2) by a tail clamping machine;

step eight: a thread rolling procedure, wherein a thread rolling machine is used for rolling the screw rod (2) to form threads;

step nine: performing heat treatment, namely annealing and tempering the processed screw;

step ten: step ten: electroplating, namely electroplating a pure aluminum coating on the outer surface of the screw;

step eleven: and (5) cleaning, drying and packaging.

4. The self-drilling screw machining process according to claim 3, wherein: the punching device is used in the punching process and comprises a vibrating discharge disc (3), a discharge slide rail (4) connected with the discharge end of the vibrating discharge disc (3), a rack (5) arranged at one end of the discharge slide rail (4) far away from the vibrating discharge disc (3), a clamping and positioning assembly (6) arranged on the rack (5) and a punching assembly (7);

the discharging slide rail (4) is provided with a chute, the width of which is greater than the diameter of the screw rod (2) and less than the diameter of the pan head (1), the discharging slide rail (4) is obliquely arranged, and the height of the inclined plane at one end close to the vibrating discharging pan (3) is high;

the positioning assembly (6) is positioned below the discharging slide rail (4), and the positioning assembly (6) comprises a bottom plate (61) fixed on the rack (5), a first clamping block (62) and a second clamping block (63) which are connected to the bottom plate (61) in a sliding manner, a first electric push rod (64) driving the first clamping block (62) to move and a second electric push rod (65) driving the second clamping block (63) to move; one side of the first clamping block (62) and one side of the second clamping block (63) which are close to each other are provided with cambered surfaces for clamping the screw rod (2);

the punching assembly (7) comprises a first lifting piece fixed at the top end of the rack (5), a lifting plate (72) fixed on a piston rod of the first lifting piece, a second lifting piece with a cylinder body fixed at the top end of the lifting plate (72), a connecting plate (74) fixed on a piston rod of the second lifting piece, a fixing rod (75) fixed on the lifting plate (72) and a punching piece (76) arranged on the fixing rod (75);

the horizontal section of the lifting plate (72) is circular, the number of the fixing rods (75) is the same as that of the auxiliary holes (12) and the fixing rods are uniformly arranged along the circumferential direction of the lifting plate (72), the punching pieces (76) are driven by the connecting plate (74) to slide on the fixing rods (75), and the connecting line of the fixing rods (75) and the punching pieces (76) passes through the axis of the lifting plate (72).

5. The self-drilling screw machining process according to claim 4, wherein: ejection of compact slide rail (4) are including main rail (41) of being connected with the vibration ejection of compact dish, two spinal branch rails (42) of being connected with main rail (41), fix fixed block (43) at main rail (41) and spinal branch rail (42) juncture, rotate swivel plate (44) of connecting on fixed block (43) and fix on fixed block (43) and drive swivel plate (44) and do reciprocating rotation's driving piece, the quantity of locating component (6) and subassembly (7) of punching is two sets of, be located branch rail (42) respectively and keep away from the one end of main rail (41).

6. The self-drilling screw machining process according to claim 5, wherein: limiting blocks (412) are fixed on two sides of one end, close to the branch rail (42), of the main rail (41).

7. The self-drilling screw machining process according to claim 4, wherein: a first stop block (621) is fixed on one side, close to the supporting rail (42), of the first clamping block (62), and a second stop block (631) is fixed on one side, far away from the supporting rail (42), of the second clamping block (63).

8. The self-drilling screw machining process according to claim 4, wherein: the fixed rod (75) comprises a vertical rod (751) vertically fixed at the bottom end of the lifting plate (72) and an inclined rod (752) fixedly connected with the bottom end of the vertical rod (751), and the inclined rod (752) inclines towards the axial direction close to the lifting plate (72); a sliding block (761) which slides on the inclined rod (752) is fixed on the punching piece (76), a connecting rod (763) with one end hinged with the sliding block (761) is arranged on the sliding block (761), and one end of the connecting rod (763) is hinged and fixed on the connecting block (762).

Technical Field

The invention relates to the technical field of fasteners, in particular to a self-drilling screw and a processing technology thereof.

Background

The screw is the most common fastening part, and the tool for fastening the parts of the object is used by utilizing the physics and mathematical principle of the inclined circular rotation and friction of the object in a progressive manner. The self-tapping screw is a screw with a self-tapping drilling head at the front end of the screw, the self-tapping screw is not required to be matched with a nut and is also called a self-tapping screw, the tail part of the self-tapping screw is in a self-tapping or pointed tail shape, a workpiece is not required to be drilled and drilled with a drill wire, holes can be directly drilled, tapped and locked on a setting material and a base material, the toughness and the holding force of the self-tapping screw are higher than those of a common screw, the self-tapping screw cannot be loosened after being combined for a long time, the self-tapping screw is simple and safe to use, the drilling and tapping are completed at one time, and time and labor are. Self-drilling screws are mainly used for fastening metal plates such as steel plates, and are generally used for locking metal plates and non-metal plates, such as calcium silicate plates, gypsum plates and various wood plates directly on the metal plates. The self-drilling screw with a reasonable design structure can ensure that the metal plate and the matching plate are firmly locked, avoid the damage, the scraping and the like of the matching plate and is convenient to install.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a self-drilling screw which can be conveniently and continuously detached under the condition that the expected head of the screw is ground.

In order to achieve the purpose, the invention provides the following technical scheme: a self-drilling screw comprises a pan head and a screw rod vertically fixed on one side of the pan head, wherein a plurality of auxiliary holes are uniformly formed in the side wall of the pan head in the circumferential direction of the pan head.

By adopting the technical scheme, when the cross thread on the pan head is worn due to various reasons and cannot be matched with the disassembling tool, the steel bar with high hardness can be inserted into the auxiliary hole. The screw is driven to rotate by rotating the steel bar; and the steel bar for dismounting has wide adaptability, and the flexibility of dismounting the screw is increased.

The invention is further configured to: the auxiliary hole is obliquely arranged, and the inclined surface of one end close to the outer side is high.

Through adopting above-mentioned technical scheme, the auxiliary hole that the slope set up can reduce the horizontal space that the screw that inserts behind the rigid strip took, and make things convenient for the insertion of rigid strip more.

The invention also aims to provide a self-drilling screw processing technology which is convenient for processing the self-drilling screw.

The invention is further configured to: a self-drilling screw processing technology is characterized in that: the method for machining the self-drilling screw of claim 2, comprising the steps of:

the method comprises the following steps: carrying out rough drawing, namely carrying out rough drawing treatment on the steel wire through a wire drawing machine;

step two: annealing treatment, namely placing the steel wire subjected to rough drawing into a convection type spheroidizing annealing furnace for annealing;

step three: acid pickling and phosphating, namely, sequentially passing the steel wire through a pickling tank and a phosphating tank to carry out acid pickling and phosphating on the steel wire;

step four: a fine drawing process, wherein the steel wire after acid pickling and phosphorization is subjected to secondary drawing treatment through drawing;

step five: a heading process, wherein heading treatment is carried out on the steel wire after the secondary wire drawing is finished through a heading machine;

step six: punching auxiliary holes on the pan head of the screw by a punching device;

step seven: a tail clamping procedure, namely clamping the tail of the screw rod part by a tail clamping machine;

step eight: a thread rolling process, wherein a thread rolling machine is used for rolling the screw rod to form threads;

step nine: performing heat treatment, namely annealing and tempering the processed screw;

step ten: step ten: electroplating, namely electroplating a pure aluminum coating on the outer surface of the screw;

step eleven: and (5) cleaning, drying and packaging.

Through adopting above-mentioned technical scheme, through adding the process of punching between the process of beating the head and the tail clamp process at traditional tail clamp screw production process, be convenient for punch the screw.

The invention is further configured to: the punching device is used in the punching process and comprises a vibrating discharge disc, a discharge slide rail connected with the discharge end of the vibrating discharge disc, a rack arranged at one end of the discharge slide rail far away from the vibrating discharge disc, a clamping and positioning assembly arranged on the rack and a punching assembly; the discharging slide rail is provided with a slide groove with the width larger than the diameter of the screw rod and smaller than the diameter of the pan head, and the discharging slide rail is obliquely arranged, and the height of the inclined plane at one end close to the vibrating discharging pan is high; the positioning assembly is positioned below the discharging slide rail and comprises a bottom plate fixed on the rack, a first clamping block and a second clamping block which are connected to the bottom plate in a sliding manner, a first electric push rod driving the first clamping block to move and a second electric push rod driving the second clamping block to move; one side of the first clamping block, which is close to the second clamping block, is provided with a cambered surface for clamping the screw rod; the punching assembly comprises a first lifting piece fixed at the top end of the rack, a lifting plate fixed on a piston rod of the first lifting piece, a second lifting piece fixed at the top end of the lifting plate by a cylinder body, a connecting plate fixed on a piston rod of the second lifting piece, a fixed rod fixed on the lifting plate and a punching piece arranged on the fixed rod; the horizontal cross section of the lifting plate is circular, the number of the fixing rods is the same as that of the auxiliary holes, the fixing rods are evenly arranged in the circumferential direction of the lifting plate, the punching pieces are driven by the connecting plate to slide on the fixing rods, and the connecting lines of the fixing rods and the punching pieces pass through the axis of the lifting plate.

Through adopting above-mentioned technical scheme, the screw after the completion of beating the head is placed the vibration and is gone out the material dish, through the vibration ejection of compact of vibration play material dish, enters into ejection of compact slide rail on, on the ejection of compact slide rail that follows whole slope slides locating component again, through locating component's location with press from both sides tight back, drills to it through the subassembly that punches at last to the convenience is drilled the screw.

The invention is further configured to: the ejection of compact slide rail includes the main rail of being connected with the vibration ejection of compact dish, two spinal branch rails of being connected with the main rail, fix the fixed block in main rail and spinal branch rail juncture, rotate the rotor plate of connection on the fixed block and fix on the fixed block and drive the rotor plate and do reciprocating rotation's driving piece, and the quantity of locating component and the subassembly that punches is two sets of, is located the one end that the main rail was kept away from to the spinal branch rail respectively.

By adopting the technical scheme, the rotating plate which rotates in a reciprocating manner can enable the screws on the main rail to alternately enter the two branch rails; when the speed of feeding is greater than the speed of punching, the screw that crisscross entering on the tributary track can alleviate the feed rate on the single tributary track to improve production efficiency.

The invention is further configured to: and limiting blocks are fixed on two sides of one end, close to the branch rail, of the main rail.

Through adopting above-mentioned technical scheme, be difficult to rotate behind rotor plate and the stopper butt, be convenient for debug slide rail motor 45's rotation before formal work to and increase the pivoted stability of rotor plate in the course of the work.

The invention is further configured to: a first stop block is fixed on one side, close to the branch rail, of the first clamping block, and a second stop block is fixed on one side, far away from the branch rail, of the second clamping block.

Through adopting above-mentioned technical scheme, first dog blocks the screw that enters into in the locating component, and the second blocks the screw that the piece was entered into in the locating component and blocks, increases the stability that the screw entered into in the clamping component.

The invention is further configured to: the fixed rod comprises a vertical rod vertically fixed at the bottom end of the lifting plate and an inclined rod fixedly connected with the bottom end of the vertical rod, and the inclined rod inclines towards the direction close to the axis of the lifting plate; the punching piece is fixed with a sliding block which slides on the inclined rod, the sliding block is provided with a connecting rod, one end of the connecting rod is hinged with the sliding block, and one end of the connecting rod is hinged with a fixing block.

Through adopting above-mentioned technical scheme, the slider slides on the slope pole, and is spacing to the slip of slider for the punching part slides along the slope pole under the drive of connecting plate, drives the punching of punching part to the screw, and the auxiliary hole of slope is opened out to the side of the coiled hair of being convenient for.

In conclusion, the beneficial technical effects of the invention are as follows:

1. when the cross pattern on the pan head is worn out for various reasons and cannot be engaged with the removal tool, it is possible to insert a steel rod having high hardness into the auxiliary hole. The screw is driven to rotate by rotating the steel bar; the steel bar for dismounting has wide adaptability, and the flexibility of dismounting the screw is increased;

2. the screw with the head being punched is placed in the vibrating discharging disc, discharged through vibration of the vibrating discharging disc, enters the discharging slide rail, slides onto the positioning assembly from the integrally inclined discharging slide rail, and is drilled through the punching assembly after being positioned and clamped by the positioning assembly, so that the screw is conveniently drilled;

3. the rotating plate is difficult to rotate after being abutted against the limiting block, so that the sliding rail motor 45 can be conveniently debugged before formal work, and the rotating stability of the rotating plate in the working process is improved.

Drawings

FIG. 1 is a schematic structural diagram according to a first embodiment;

FIG. 2 is a schematic view of the punching apparatus;

FIG. 3 is a schematic structural view of a discharge slide rail;

FIG. 4 is a schematic structural view of a positioning assembly;

fig. 5 is a schematic structural view of the punching assembly.

In the figure: 1. coiling; 11. cross grain; 12. an auxiliary hole; 2. a screw; 21. drilling a tail; 3. vibrating the discharging disc; 4. a discharge slide rail; 41. a primary rail; 411. a chute; 412. a limiting block; 42. a track is branched; 43. a fixed block; 44. a rotating plate; 45. a slide rail motor; 5. a frame; 6. a positioning assembly; 61. a base plate; 611. a fixing plate; 62. a first clamping block; 621. a first stopper; 63. a second clamping block; 631. a second stopper; 64. a first electric push rod; 65. a second electric push rod; 7. a punching assembly; 71. a first cylinder; 72. a lifting plate; 73. a second cylinder; 74. a connecting plate; 75. fixing the rod; 751. a vertical rod; 752. an inclined lever; 76. punching a hole; 761. a slider; 762. connecting blocks; 763. a connecting rod; 764. a drill stem; 765. a punching motor.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.