TWI669174B - Self-tapping screw spiral cutting edge processing method - Google Patents

Abstract

The method for processing the spiral cutting edge of the self-tapping screw of the invention comprises the following steps: A. feeding, clamping the self-tapping screw semi-finished product, B. cutting the feeding knife, and having an average halving of two, three or four tools, The cutters have an angle between them, and the feed displacement is close to the semi-finished product of the self-tapping screws. C. The cutting starts, the clamp drives the semi-finished product displacement of the self-tapping screws to rotate at the same time, and the cutters fit the shaft and the pointed tail shape. Knife displacement, D. Finished product, at least two, three or four spiral cutting grooves and cutting edges on the shaft, tip and thread, E. Cutting retracting, retracting self-tapping screws, F. After the material is loosened, the self-tapping screw is loosened and the homing displacement is performed; thereby cutting at least two spiral cutting grooves and cutting edges, which improves the cutting time quickly, facilitates drilling, and further improves the row. Chip capacity.

Description

Self-tapping screw spiral cutting edge processing method

The invention relates to a processing method for manufacturing a screw, in particular to a method for processing a spiral cutting edge of a self-tapping screw.

Conventionally, as shown in the first figure, in the cutting edge machining method of a general self-tapping screw, a cutter 50 is slowly cut along the shaft 61 of the tapping screw 60 (about 0.5 mm after the knife is retracted) In the infeed, in this way, a cutting groove 62 having a straight line angle of about 90 degrees and a linear cutting edge 63 are formed. However, this machining method allows the cutting groove 62 and the cutting edge 63 to be linear only, and the cutting is performed. Slowly unable to mass produce.

In addition, the chip removal effect of the cutting groove 62 having a straight line angle of about 90 degrees is not good, and when the self-tapping screw 70 is locked, the cutting groove 62 of the self-tapping screw 60 cannot smoothly discharge the wood chips, and the snail is blocked. The pressure between the teeth can not be discharged, and the pressure of the self-tapping screw 60 is pressed through the screw and the shaft 61 to cause the expansion stress concentration of the wooden piece, so that the wooden piece is easily cracked due to excessive pressure. In addition, it will damage the structural strength of the wooden parts and the locking effect of the self-tapping screws 60, especially when the surface of the wooden parts is cracked, which will seriously damage the integrity of the wooden parts and the safety of the goods.

The inventors have in view of the processing method of the self-tapping screw that the cutting groove and the cutting edge can only be linear, and the cutting is slow and cannot be mass-produced and the cutting groove of the self-tapping screw is at a straight angle of about 90 degrees. The defects of the chip are not good, and the cracking of the wooden parts is easy to be caused when drilling the wooden parts. It is the idea of the invention and the invention, and the design and test sample test are discussed by many parties, and the correction is made after many corrections. The present invention has been developed.

The spiral cutting edge processing method of the self-tapping screw of the invention comprises the following steps: A. feeding, conveying a self-tapping screw semi-finished product to a fixture, the clamp clamping the self-tapping screw semi-finished product, the self-tapping screw semi-finished product has a rod The shaft has a screw head at one end, a pointed tail at the other end, and a spiral thread on the shaft and the pointed tail; B. cutting the cutting knife, and an average aliquot is provided at the outer circumference of the clamp in the center extending direction Two, three or four tools are selected, the angle between the tools is 180 degrees when the tool is two, the angle is 120 degrees when the tool is three, and the angle is when the tool is four At 90 degrees, the cutters rotate at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product; C. The cutting starts, the clamp drives the self-tapping screw semi-finished product feed displacement to rotate at the same time, and the cutters cooperate with the shaft and the shaft The tip end shape of the tool is displaced, so that the cutter cuts at least two, three or four spiral cutting grooves and cutting edges on the tip end portion of the semi-finished screw semi-finished product, the shaft to the thread, and the cutting tool Angle between Equally divided, the forces of the self-tapping screws and semi-finished products of the self-tapping screws are offset each other during cutting, so that the semi-finished products of the self-tapping screws are not deformed and the cutting is stable; D. Finished products, the self-tapping screws have a shaft The shaft has a screw head at one end and a pointed tail at the other end. The shaft has a spiral thread on the surface of the tip end, and the shaft body, the tip end portion and the thread have at least two or three or a spiral cutting groove and a cutting edge, the thread has a first pitch, the cutting groove has a second pitch, and the second pitch is greater than the first pitch; E. cutting and retracting, the tools retracting Displacement, retreat from the self-tapping screw finished product; F. unloading, the clamp stops the feed displacement and rotation and loosens the self-tapping screw finished product and performs the homing displacement.

The main purpose of the spiral cutting edge processing method of the self-tapping screw of the present invention is that an average aliquot of two, three or four tools is provided at the outer circumference of the extending direction of the clamp center, and the cutters have an angle between them, and when the two cutters are included, the angle is It is 180 degrees. When it is three tools, the angle is 120 degrees. When the tool is four tools, the angle is 90 degrees, which makes the forces of the self-tapping screws semi-finished products offset each other when cutting. The semi-finished product of the self-tapping screw is not deformed, and the cutting time is not required with a slow feed, so that a large amount of production can be achieved.

The second purpose of the spiral cutting edge processing method of the self-tapping screw of the present invention is to use the clamp to drive the semi-finished product of the self-tapping screw to rotate and feed, and the tools can synchronously rotate and cut the center of the self-tapping screw semi-finished product. The infeed displacement causes at least two helical cutting grooves and cutting edges on the shaft surface, the tip end surface and the thread.

Another object of the spiral cutting edge processing method of the self-tapping screw of the present invention is that when the self-tapping screw finished product is used for drilling a moving wood part, the cutting edge facilitates the drilling of the wooden workpiece, and on the other hand, When drilling, the wood chips will be discharged upward along the shape of the cutting groove, thereby improving the chip removal capability.

Referring to the second figure, the first embodiment of the method for processing the spiral cutting edge of the self-tapping screw of the present invention comprises the following steps: A. loading A1, B. cutting infeed A2, C. cutting start A3, D. finished product A4, E. Cutting retraction A5 and F. Cutting A6.

A. Feeding A1, as shown in the third figure, a self-tapping screw semi-finished product 10 is transported to a fixture 20, and the clamp 20 clamps the self-tapping screw semi-finished product 10, and the self-tapping screw semi-finished product 10 has a shaft 11 The shaft 11 has a screw head 12 at one end, a pointed tail portion 13 at the other end, and the shaft 11 and the pointed tail portion 13 are provided with a helical thread 14 .

B. Cutting infeed A2, as shown in the fourth, fifth, sixth and seventh figures, the outer circumference of the clamp 20 is provided with an average equal division of two, three or four cutters 30. The cutters 30 have an angle θ1, θ2, θ3 therebetween. When the two cutters 30 are the angle θ1 is 180 degrees, when the three cutters 30 are, the angle θ2 is 120 degrees, when the four cutters 30 are The angle θ3 is 90 degrees, and the cutters 30 are rotated at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product 10, and the cutters 30 are provided with a blade portion 31. When the cutters 30 are rotated at a high speed, the cutter portions are 31 will have the function of cutting.

C. Cutting start A3, as shown in the eighth and ninth diagrams, the clamp 20 drives the self-tapping screw semi-finished product 10 to shift the feed while rotating, and the cutters 30 cooperate with the shaft 11 and the pointed tail 13 to enter the shape Displacement, the cutters 30 cut at least two, three or four spiral cutting grooves 45 and cutting edges 46 on the tip end portion 13 of the self-tapping screw semi-finished product 10, the shaft 11 to the thread 14, the cutters The angles θ1, θ2, and θ3 between 30 are equally divided into two parts, so that the force of the cutters 30 to the self-tapping screw semi-finished product 10 cancels each other during cutting, so that the self-tapping screw semi-finished product 10 does not deform and the cutting is stable. .

D. Finished product A4, as shown in the tenth figure, the self-tapping screw finished product 40 has a shaft 41 having a screw head 42 at one end and a pointed tail portion 43 at the other end, the shaft 41 to the pointed tail portion 43 The surface has a spiral thread 44. The shaft 41, the tip end portion 43 and the thread 44 have at least two, three or four spiral cutting grooves 45 and cutting edges 46. The thread 44 has The first pitch 47, the cutting groove 45 has a second pitch 48, and the second pitch 48 is greater than the first pitch 47.

E. Cutting retracting knife A5, as shown in Fig. 11, the cutters 30 perform the retraction displacement and retreat from the self-tapping screw finished product 40.

F. Blanking A6, as shown in Fig. 12, the clamp 20 stops the feed displacement and rotation and releases the self-tapping screw finished product 40, and then performs the homing displacement.

Figure 13 is a second embodiment of the method for processing a helical cutting edge of the self-tapping screw of the present invention, comprising the following steps: A. loading B1, B. cutting feed B2, C. cutting start B3, D. Finished product B4, E. Cutting retraction B5 and F. Unloading B6.

A. Feeding B1, as shown in the third figure, a self-tapping screw semi-finished product 10 is transported to a clamp 20, and the clamp 20 clamps the self-tapping screw semi-finished product 10, and the self-tapping screw semi-finished product 10 has a shaft 11 The shaft 11 has a screw head 12 at one end, a pointed tail portion 13 at the other end, and the shaft 11 and the pointed tail portion 13 are provided with a helical thread 14 .

B. Cutting infeed B2, as shown in the fourth, fifth, sixth and seventh figures, the outer circumference of the clamp 20 in the direction of the central extension is provided with an average of two, three or four tools 30 alternatives The cutters 30 have an angle θ1, θ2, θ3 therebetween. When the two cutters 30 are the angle θ1 is 180 degrees, when the three cutters 30 are, the angle θ2 is 120 degrees, when the four cutters 30 are The angle θ3 is 90 degrees, and the cutters 30 are rotated at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product 10, and the cutters 30 are provided with a blade portion 31. When the cutters 30 are rotated at a high speed, the cutter portions are 31 will have the function of cutting.

C. Cutting start B3, as shown in the fourteenth and fifteenth figures, the clamp 20 drives the self-tapping screw semi-finished product 10 feed displacement, and the cutters 30 are synchronized with the self-tapping screw semi-finished product 10 central rotational displacement and Cooperating with the shape of the shaft 11 and the pointed tail portion 13 to cause the cutters 30 to cut at least two, three or four spirals on the tip end portion 13 of the tapping screw semi-finished product 10, the shaft 11 to the thread 14 The cutting grooves 45 and the cutting edges 45, the angles θ1, θ2, and θ3 between the cutters 30 are equally divided equally, so that the forces of the cutters 30 for the self-tapping screws semi-finished products 10 are offset each other during cutting. The self-tapping screw semi-finished product 10 does not deform and the cutting is stable.

D. Finished product B4, as shown in the tenth figure, the self-tapping screw finished product 40 has a shaft 41 having a screw head 42 at one end and a pointed tail portion 43 at the other end, the shaft 41 to the pointed tail portion 43 The surface has a spiral thread 44. The shaft 41, the tip end portion 43 and the thread 44 have at least two, three or four spiral cutting grooves 45 and cutting edges 46. The thread 44 has The first pitch 47, the cutting groove 45 has a second pitch 48, and the second pitch 48 is greater than the first pitch 47.

E. Cutting retraction B5, as shown in Fig. 11, the cutters 30 perform the retraction displacement and retreat from the self-tapping screw finished product 40.

F. Blanking B6, as shown in Fig. 12, the clamp 20 stops the feed displacement and releases the self-tapping screw finished product 40 and performs the homing displacement.

Figure 16 is a third embodiment of the method for processing a spiral cutting edge of the self-tapping screw of the present invention, comprising the following steps: A. feeding C1, B. cutting feed C2, C. cutting start C3, D. Finished product C4, E. Cutting retraction C5 and F. Cutting C6.

A. Feeding C1, as shown in the third figure, a self-tapping screw semi-finished product 10 is transported to a fixture 20, and the clamp 20 clamps the self-tapping screw semi-finished product 10, and the self-tapping screw semi-finished product 10 has a shaft 11 The shaft 11 has a screw head 12 at one end, a pointed tail portion 13 at the other end, and the shaft 11 and the pointed tail portion 13 are provided with a helical thread 14 .

B. Cutting feed C2, as shown in the fourth, fifth, sixth and seventh figures, the outer circumference of the clamp 20 is provided with an average division of two, three or four cutters 30. The cutters 30 have an angle θ1, θ2, θ3 therebetween. When the two cutters 30 are the angle θ1 is 180 degrees, when the three cutters 30 are, the angle θ2 is 120 degrees, when the four cutters 30 are The angle θ3 is 90 degrees, and the cutters 30 are rotated at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product 10, and the cutters 30 are provided with a blade portion 31. When the cutters 30 are rotated at a high speed, the cutter portions are 31 will have the function of cutting.

C. Cutting start C3, as shown in FIG. 17 and FIG. 18, the clamp 20 drives the self-tapping screw semi-finished product 10 to rotate, and the cutters 30 are synchronized with the long axial feed displacement of the shaft 11 and Cooperating with the shape of the shaft 11 and the pointed tail portion 13 to cause the cutters 30 to cut at least two, three or four spirals on the tip end portion 13 of the tapping screw semi-finished product 10, the shaft 11 to the thread 14 The cutting grooves 45 and the cutting edges 46, the angles θ1, θ2, and θ3 between the cutters 30 are equally divided equally, so that the forces of the cutters 30 for the self-tapping screws semi-finished products 10 are offset each other during cutting. The self-tapping screw semi-finished product 10 does not deform and the cutting is stable.

D. Finished product C4, as shown in the tenth figure, the self-tapping screw finished product 40 has a shaft 41 having a screw head 42 at one end and a pointed tail portion 43 at the other end, the shaft 41 to the pointed tail portion 43 The surface has a spiral thread 44. The shaft 41, the tip end portion 43 and the thread 44 have at least two, three or four spiral cutting grooves 45 and cutting edges 46. The thread 44 has The first pitch 47, the cutting groove 45 has a second pitch 48, and the second pitch 48 is greater than the first pitch 47.

E. Cutting retracting cutter C5, as shown in Fig. 11, the cutters 30 perform the retraction displacement and retreat from the self-tapping screw finished product 40.

F. Blanking C6, as shown in Fig. 12, the clamp 20 stops rotating and loosens the self-tapping screw finished product 40.

Figure 19 shows a fourth embodiment of the spiral cutting edge machining method for the self-tapping screw of the present invention, comprising the following steps: A. loading D1, B. cutting feed D2, C. cutting start D3, D. Finished product D4, E. Cutting retracting D5 and F. Cutting D6.

A. Feeding D1, as shown in the third figure, a self-tapping screw semi-finished product 10 is transported to a fixture 20, and the clamp 20 clamps the self-tapping screw semi-finished product 10, and the self-tapping screw semi-finished product 10 has a shaft 11 The shaft 11 has a screw head 12 at one end, a pointed tail portion 13 at the other end, and the shaft 11 and the pointed tail portion 13 are provided with a helical thread 14 .

B. Cutting infeed D2, as shown in the fourth, fifth, sixth and seventh figures, the outer circumference of the clamp 20 in the direction of the central extension is provided with an average of two, three or four tools 30 alternatives The cutters 30 have an angle θ1, θ2, θ3 therebetween. When the two cutters 30 are the angle θ1 is 180 degrees, when the three cutters 30 are, the angle θ2 is 120 degrees, when the four cutters 30 are The angle θ3 is 90 degrees, and the cutters 30 are rotated at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product 10, and the cutters 30 are provided with a blade portion 31. When the cutters 30 are rotated at a high speed, the cutter portions are 31 will have the function of cutting.

C. Cutting start D3, as shown in the twentieth and twenty-first figures, the cutters 30 are displaced by the long axial direction of the shaft 11 and rotated by the center of the self-tapping screw semi-finished product 10, and cooperate with the The shaft 11 and the pointed end 13 are axially displaced, so that the cutters 30 are cut at least two, three or four in a spiral shape on the tip end portion 13 of the tapping screw semi-finished product 10, the shaft 11 to the thread 14. The cutting groove 45 and the cutting edge 46, the angles θ1, θ2, and θ3 between the cutters 30 are equally divided equally, so that the forces of the cutters 30 for the self-tapping screw semi-finished products 10 cancel each other during cutting, so that the cutting groove 45 and the cutting edge 46 The self-tapping screw semi-finished product 10 will not be deformed and the cutting is stable.

D. Finished product D4, as shown in the tenth figure, the self-tapping screw finished product 40 has a shaft 41 having a screw head 42 at one end and a pointed tail portion 43 at the other end, the shaft 41 to the pointed tail portion 43 The surface has a spiral thread 44. The shaft 41, the tip end portion 43 and the thread 44 have at least two, three or four spiral cutting grooves 45 and cutting edges 46. The thread 44 has The first pitch 47, the cutting groove 45 has a second pitch 48, and the second pitch 48 is greater than the first pitch 47.

E. Cutting retraction D5, as shown in Fig. 11, the cutters 30 perform the retraction displacement and retreat from the self-tapping screw finished product 40.

F. Blanking D6, as shown in Fig. 12, the clamp 20 releases the self-tapping screw finished product 40.

As shown in the twenty-second figure, the fifth embodiment of the method for processing the spiral cutting edge of the self-tapping screw of the present invention comprises the following steps: A. loading E1, B. cutting feed E2, C. cutting start E3, D Finished product E4, E. Cutting retraction E5 and F. Cutting E6.

A. Feeding E1, as shown in the third figure, a self-tapping screw semi-finished product 10 is transported to a fixture 20, and the clamp 20 clamps the self-tapping screw semi-finished product 10, and the self-tapping screw semi-finished product 10 has a shaft 11 The shaft 11 has a screw head 12 at one end, a pointed tail portion 13 at the other end, and the shaft 11 and the pointed tail portion 13 are provided with a helical thread 14 .

B. Cutting infeed E2, as shown in the fourth, fifth, sixth and seventh figures, the outer circumference of the clamp 20 is provided with an average equal division of two, three or four cutters 30. The cutters 30 have an angle θ1, θ2, θ3 therebetween. When the two cutters 30 are the angle θ1 is 180 degrees, when the three cutters 30 are, the angle θ2 is 120 degrees, when the four cutters 30 are The angle θ3 is 90 degrees, and the cutters 30 are rotated at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product 10, and the cutters 30 are provided with a blade portion 31. When the cutters 30 are rotated at a high speed, the cutter portions are 31 will have the function of cutting.

C. Cutting start E3, as shown in the twenty-third figure and the twenty-fourth figure, the clamp 20 drives the self-tapping screw semi-finished product 10 feed displacement, and the cutters 30 are synchronized with the self-tapping screw semi-finished product 10 center rotation Displacement and displacement of the long axial direction of the shaft 11 and matching the shape of the shaft 11 and the pointed tail portion 13 to cause the cutters 30 to be at the tip end portion 13 and the shaft of the self-tapping screw semi-finished product 10 11 to the thread 14 cut at least two, three or four spiral cutting grooves 45 and cutting edges 46, the angles θ1, θ2, θ3 between the tools 30 are evenly divided, so that the cutting tools 30 The force of the self-tapping screw semi-finished product 10 is offset from each other, so that the self-tapping screw semi-finished product 10 is not deformed and the cutting is stable.

D. Finished product E4, as shown in the tenth figure, the self-tapping screw finished product 40 has a shaft 41 having a screw head 42 at one end and a pointed tail portion 43 at the other end, the shaft 41 to the pointed tail portion 43 The surface has a spiral thread 44. The shaft 41, the tip end portion 43 and the thread 44 have at least two, three or four spiral cutting grooves 45 and cutting edges 46. The thread 44 has The first pitch 47, the cutting groove 45 has a second pitch 48, and the second pitch 48 is greater than the first pitch 47.

E. Cutting retraction E5, as shown in Fig. 11, the cutters 30 perform the retraction displacement and retreat from the self-tapping screw finished product 40.

F. Blanking E6, as shown in Fig. 12, the clamp 20 stops the feed displacement and releases the self-tapping screw finished product 40, and then performs the homing displacement.

The twenty-fifth figure shows a sixth embodiment of the spiral cutting edge processing method of the self-tapping screw of the present invention, comprising the following steps: A. loading F1, B. cutting feed F2, C. cutting start F3, D Finished product F4, E. Cutting retraction F5 and F. Unloading F6.

A. Feed F1, as shown in the third figure, a self-tapping screw semi-finished product 10 is transported to a fixture 20, and the clamp 20 clamps the self-tapping screw semi-finished product 10, and the self-tapping screw semi-finished product 10 has a shaft 11 The shaft 11 has a screw head 12 at one end, a pointed tail portion 13 at the other end, and the shaft 11 and the pointed tail portion 13 are provided with a helical thread 14 .

B. Cutting feed F2, as shown in the fourth, fifth, sixth and seventh figures, the outer circumference of the clamp 20 is provided with an average equal division of two, three or four cutters 30 The cutters 30 have an angle θ1, θ2, θ3 therebetween. When the two cutters 30 are the angle θ1 is 180 degrees, when the three cutters 30 are, the angle θ2 is 120 degrees, when the four cutters 30 are The angle θ3 is 90 degrees, and the cutters 30 are rotated at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product 10, and the cutters 30 are provided with a blade portion 31. When the cutters 30 are rotated at a high speed, the cutter portions are 31 will have the function of cutting.

C cutting start F3, as shown in the twenty-sixth and twenty-seventh drawings, the clamp 20 drives the self-tapping screw semi-finished product 10 to shift the feed while rotating, and the cutters 30 are synchronized with the long axis of the shaft 11 The infeed displacement and the axial displacement of the shaft 11 and the pointed tail portion 13 cause the cutters 30 to cut at least two or three on the tip end portion 13 of the tapping screw semi-finished product 10, the shaft 11 to the thread 14 Or four spiral cutting grooves 45 and cutting edges 46, the angles θ1, θ2, and θ3 between the cutters are equally divided equally, so that the forces of the cutters 30 for the self-tapping screws semi-finished products 10 are mutually offset during cutting. The pin makes the self-tapping screw semi-finished product 10 not deformed and the cutting is stable.

D. Finished product F4, as shown in the tenth figure, the self-tapping screw finished product 40 has a shaft 41 having a screw head 42 at one end and a pointed tail portion 43 at the other end, the shaft 41 to the pointed tail portion 43 The surface has a spiral thread 44. The shaft 41, the tip end portion 43 and the thread 44 have at least two, three or four spiral cutting grooves 45 and cutting edges 46. The thread 44 has The first pitch 47, the cutting groove 45 has a second pitch 48, and the second pitch 48 is greater than the first pitch 47.

E. Cutting retracting knife F5, as shown in Fig. 11, the cutters 30 perform the retraction displacement and retreat from the self-tapping screw finished product 40.

F. Cutting F6, as shown in Fig. 12, the clamp 20 stops the feed displacement and rotation and releases the self-tapping screw finished product 40, and then performs the homing displacement.

From the structure of the above specific embodiment, the following benefits can be obtained:

1. The outer circumference of the clamp 20 is provided with an average aliquot of two, three or four cutters 30, and the cutters 30 have an angle θ1, θ2, θ3 therebetween. When the cutter 30 is the same, the angle θ1 is 180. Degree, when the three tools 30, the angle θ2 is 120 degrees, when the four tools 30, the angle θ3 is 90 degrees, so that the cutting tool 30 gives the self-tapping screw semi-finished product 10 when cutting The forces offset each other, so that the self-tapping screw semi-finished product 10 will not be deformed, and it is not necessary to adopt a slow feed, which can improve the cutting time quickly, and thus can be mass-produced.

2. The clamp 20 is used to drive the self-tapping screw semi-finished product 10 to rotate and feed, and the cutters 30 can synchronously rotate and cut the rod-diameter feed with the center of the self-tapping screw semi-finished product 10, so that the surface of the shaft 11 is The surface of the tip end portion 13 and the thread 14 have at least two spiral cutting grooves and cutting edges.

3. When the self-tapping screw finished product 40 is used for drilling the moving wood piece, the cutting edge 46 facilitates the drilling of the wooden workpiece, and on the other hand, the wood chip will follow the shape of the cutting groove 45 during drilling. It is discharged upwards to improve the chip removal capacity.

[this invention]

10‧‧‧Self-tapping screws

11‧‧‧ shaft

12‧‧‧ screw head

13‧‧‧ pointed tail

14‧‧‧ thread

20‧‧‧ fixture

30‧‧‧Tools

31‧‧‧Knife

Θ1‧‧‧ angle

Θ2‧‧‧ angle

Θ3‧‧‧ angle

40‧‧‧Self-tapping screws

41‧‧‧ shaft

42‧‧‧ screw head

43‧‧‧ pointed tail

44‧‧‧ threaded teeth

45‧‧‧Cutting trough

46‧‧‧ cutting edge

47‧‧‧first pitch

48‧‧‧second pitch

A1‧‧‧ loading

A2‧‧‧ cutting into the knife

A3‧‧‧ cutting begins

A4‧‧‧Complete products

A5‧‧‧Cutting retreat

A6‧‧‧Unloading

B1‧‧‧Feeding

B2‧‧‧ cutting into the knife

B3‧‧‧ Cutting begins

B4‧‧‧Complete products

B5‧‧‧Cutting retreat

B6‧‧‧Unloading

C1‧‧‧ loading

C2‧‧‧ cutting into the knife

C3‧‧‧ cutting begins

C4‧‧‧Complete product

C5‧‧‧Cutting retraction

C6‧‧‧Unloading

D1‧‧‧ loading

D2‧‧‧ cutting into the knife

D3‧‧‧ cutting begins

D4‧‧‧ finished product

D5‧‧‧Cutting retraction

D6‧‧‧Unloading

E1‧‧‧ loading

E2‧‧‧ cutting into the knife

E3‧‧‧ cutting begins

E4‧‧‧Complete product

E5‧‧‧Cutting retracting

E6‧‧‧Unloading

F1‧‧‧ loading

F2‧‧‧ cutting into the knife

F3‧‧‧ cutting begins

F4‧‧‧ finished product

F5‧‧‧ cutting retreat

F6‧‧‧Unloading

[知知]

50‧‧‧Tools

60‧‧‧ Self-tapping screws

61‧‧‧ shaft

62‧‧‧Cutting trough

63‧‧‧ cutting edge

The first figure is a schematic diagram of conventional processing. The second figure is a flow chart of the steps of the first embodiment of the present invention. The third figure is a schematic view of the semi-finished products of the clamp clamping self-tapping screws of the first to sixth embodiments of the present invention. The fourth figure is a schematic view of the angle between the two tools of the device according to the present invention. The fifth figure is a schematic view of the angle between the three tools of the device according to the present invention. The sixth figure is a schematic view of the angle between the three tools of the device according to the present invention. The seventh figure is a schematic view of the tool feed of the first to sixth embodiments of the present invention. The eighth figure is a schematic diagram of the simultaneous rotation of the feed of the semi-finished product of the self-tapping screw driven by the clamp of the present invention. The ninth figure shows that the clamp of the invention drives the self-tapping screw semi-finished product to shift the displacement at the same time, so that at least two, three or four spiral cutting grooves and cutting edges are cut out from the tip end and the shaft to the screw. The tenth figure is a schematic view of the finished product of the self-tapping screw of the present invention. The eleventh drawing is a schematic view of the tool retracting of the first to sixth embodiments of the present invention. Fig. 12 is a schematic view showing the finished product of the clamp self-tapping screws of the first to sixth embodiments of the present invention. Figure 13 is a flow chart showing the steps of the second embodiment of the present invention. The fourteenth figure is a schematic diagram of the displacement of the semi-finished product of the self-tapping screw driven by the clamp of the invention, and the tool is synchronized with the rotation displacement of the center of the semi-finished product of the self-tapping screw. The fifteenth figure shows that the clamp of the invention drives the semi-finished product feed displacement of the self-tapping screw, and the cutter synchronizes with the center rotation position of the self-tapping screw semi-finished product, so that at least two, three or four spiral shapes are cut out from the tip end portion and the shaft body to the screw thread. Schematic diagram of the cutting groove and cutting edge. Figure 16 is a flow chart showing the steps of a third embodiment of the present invention. The seventeenth figure is a schematic diagram of the clamp of the invention driving the semi-finished product of the self-tapping screw, and the tool is synchronized with the long axial feed of the shaft. The eighteenth figure shows that the clamp of the invention drives the semi-finished product of the self-tapping screw to rotate, and the cutter synchronizes with the long axial feed of the shaft, so that at least two, three or four spirals are cut from the tip end and the shaft to the screw. Schematic diagram of the cutting groove and cutting edge. Figure 19 is a flow chart showing the steps of the fourth embodiment of the present invention. The twenty-fifth figure is a schematic view of the tool in the long axial feed of the shaft of the invention and the rotational displacement of the semi-finished product of the self-tapping screw. The twenty-first figure shows that the cutter of the invention has a long axial feed displacement of the shaft and a rotational displacement of the center of the self-tapping screw semi-finished product, so that at least two, three or four spirals are cut from the tip end and the shaft to the thread. Schematic diagram of the cutting groove and cutting edge. A twenty-second figure is a flow chart of the steps of the fifth embodiment of the present invention. The twenty-third figure is a schematic diagram of the clamp of the invention driving the semi-finished product of the self-tapping screw, and the tool is synchronously rotated by the center of the semi-finished product of the self-tapping screw and the axial displacement of the shaft. The twenty-fourth figure shows the displacement of the semi-finished product of the self-tapping screw driven by the clamp of the invention, and the tool synchronizes with the central rotation displacement of the self-tapping screw semi-finished product and the longitudinal axial feed displacement of the shaft, so that the tip end and the shaft to the thread A schematic view of at least two, three or four spiral cutting grooves and cutting edges is cut out. Figure 25 is a flow chart showing the steps of the sixth embodiment of the present invention. The twenty-sixth figure is a schematic diagram of the clamp of the invention driving the semi-finished product of the self-tapping screw to rotate at the same time, and the tool is synchronized with the long axial feed of the shaft. The twenty-seventh figure shows that the clamp of the invention drives the semi-finished product of the self-tapping screw to rotate at the same time, and the tool synchronizes with the long axial feed of the shaft, so that at least two or three are cut from the tip and the shaft to the screw. Or four spiral cutting grooves and cutting edges.

Claims (12)

A method for processing a spiral cutting edge of a self-tapping screw comprises the following steps: A. feeding a semi-finished product of a self-tapping screw to a fixture, the clamp clamping the semi-finished product of the self-tapping screw, the semi-finished product of the self-tapping screw has a shaft The shaft has a screw head at one end, a pointed tail at the other end, and a spiral thread on the shaft and the pointed tail; B. cutting into the knife, the outer circumference of the center of the clamp is equally divided into two Selecting three or four tools, the angle between the tools is 180 degrees when the tool is two, and the angle is 120 degrees when the tool is three. When the tool is four, the angle is 90 degrees, the cutters rotate at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product; C. At the beginning of cutting, the clamp drives the self-tapping screw semi-finished product feed displacement to rotate at the same time, and the cutters cooperate with the shaft and the shaft The shape of the tip end of the tip is shifted, so that the cutter cuts at least two, three or four spiral cutting grooves and cutting edges on the tip end portion of the semi-finished screw of the self-tapping screw and the shaft to the screw. The angle between the angles is equally divided, so that the forces of the self-tapping screws and semi-finished products of the self-tapping screws are offset each other during cutting, so that the semi-finished products of the self-tapping screws are not deformed and the cutting is stable; D. Finished product, self-tapping The screw finished product has a shaft having a screw head at one end and a pointed tail at the other end, and the shaft has a spiral thread on the surface of the tip end, the shaft body, the tip end portion and the thread on the thread a cutting groove and a cutting edge having at least two, three or four spirals, the thread having a first pitch, the cutting groove having a second pitch, and the second pitch being greater than the first pitch; E. cutting and retracting, The cutters perform the retracting displacement and retreat from the self-tapping screw finished product; F. the blanking, the clamping device stops the feeding displacement and rotation and releases the self-tapping screw finished product to perform the homing displacement. The method of processing a spiral cutting edge of a self-tapping screw according to the first aspect of the invention, wherein the tool is provided with a blade portion. A spiral cutting edge processing method for a self-tapping screw comprises the following steps: A. feeding, conveying a semi-finished product of a self-tapping screw to a fixture, the clamp clamping the semi-finished product of the self-tapping screw, the semi-finished product of the self-tapping screw has a shaft The shaft has a screw head at one end, a pointed tail at the other end, and a spiral thread on the shaft and the pointed tail; B. cutting into the knife, the outer circumference of the clamp extending in the direction of the center is equally divided into two Selecting three or four tools, the angle between the tools is 180 degrees when the tool is two, and the angle is 120 degrees when the tool is three. When the tool is four, the angle is 90 degrees, the cutters rotate at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product; C. cutting starts, the clamp drives the self-tapping screw semi-finished product feed displacement, and the cutters are synchronized with the self-tapping screw semi-finished product The central rotational displacement and the displacement of the shaft and the shape of the pointed tail shape enable the cutters to cut at least two, three or four spiral cuttings on the tip end portion of the semi-finished screw of the self-tapping screw and the shaft to the thread. groove The cutting edge, the angle between the tools is equally divided, so that the force of the tools to the self-tapping screws semi-finished products offset each other during cutting, so that the self-tapping screw semi-finished products are not deformed and the cutting is stable; D. The finished product has a shaft with a self-tapping screw having a screw head at one end and a pointed tail at the other end. The shaft has a spiral thread on the surface of the tip end, and the shaft and the tail portion And the thread has at least two, three or four spiral cutting grooves and cutting edges, the thread has a first pitch, the cutting groove has a second pitch, and the second pitch is greater than the first pitch; Cutting and retracting, the tools perform the retracting displacement, and retreat from the self-tapping screw finished product; F. unloading, the clamping device stops the feeding displacement and releases the self-tapping screw finished product and performs the homing displacement. The method of processing a spiral cutting edge of a self-tapping screw according to claim 3, wherein the cutter is provided with a blade portion. A method for processing a spiral cutting edge of a self-tapping screw, comprising the following steps: A. feeding, feeding a self-tapping screw semi-finished product to a fixture, the clamp clamping the semi-finished product of the self-tapping screw, the semi-finished product of the self-tapping screw has a shaft, the shaft has a screw head at one end and a pointed tail at the other end The shaft and the pointed tail portion are provided with spiral threaded teeth; B. cutting the feeding knife, and the outer circumference of the clamp extending direction is provided with an average equal division of two, three or four tools, and one of the cutters is Angle, when the two tools are the angle is 180 degrees, when the three tools are the angle is 120 degrees, when the four tools are the angle is 90 degrees, the tools are high-speed rotation, and synchronous feed displacement Close to the semi-finished product of the self-tapping screw; C. starting the cutting, the clamp drives the semi-finished product of the self-tapping screw to rotate, and the tools synchronously feed the tool with the long axial feed of the shaft and cooperate with the shaft and the shape of the pointed tail The displacement causes the cutters to cut at least two, three or four spiral cutting grooves and cutting edges on the tip end portion of the semi-finished screw of the self-tapping screw, and the shaft to the thread, and the angle between the tools is equally divided equally , so that the tools are given when cutting The force of the tapping screw semi-finished product cancels each other, so that the self-tapping screw semi-finished product will not be deformed and the cutting is stable; D. The finished product, the self-tapping screw finished product has a shaft, the shaft has a screw head at one end, and the other end has a a pointed end portion, the shaft has a spiral thread on the surface of the tip end, and the shaft body, the tip end portion and the thread have at least two, three or four spiral cutting grooves and cutting edges. The thread has a first pitch, the cutting groove has a second pitch, and the second pitch is greater than the first pitch; E. cutting and retracting, the cutters perform a retraction displacement, and retreat from the self-tapping screw finished product; F. Unloading, the clamp stops rotating and loosens the self-tapping screw finished product. The method of processing a spiral cutting edge of a self-tapping screw according to claim 5, wherein the tool is provided with a blade portion. A spiral cutting edge processing method for a self-tapping screw comprises the following steps: A. feeding, conveying a semi-finished product of a self-tapping screw to a fixture, the clamp clamping the semi-finished product of the self-tapping screw, the semi-finished product of the self-tapping screw has a shaft The shaft has a screw head at one end, a pointed tail at the other end, and a spiral thread on the shaft and the pointed tail; B. Cutting the cutting tool, the outer circumference of the extending direction of the jig is provided with an average halving of two, three or four tools, and the tools have an angle between them, and when the two tools are two, the angle is 180 degrees. The angle is 120 degrees for the three tools, and the angle is 90 degrees when the four tools are. The tools are rotated at a high speed, and the synchronous feed displacement is close to the semi-finished product of the tapping screw; C. cutting starts, the tools The long axial feed displacement of the shaft and the central rotational displacement of the semi-finished screw of the self-tapping screw, and the displacement of the shaft and the shape of the pointed tail, so that the cutters are at the tip end of the self-tapping screw semi-finished product, Cutting at least two, three or four spiral cutting grooves and cutting edges from the shaft to the thread, the angle between the tools is equally divided equally, so that the cutting tools give the self-tapping screws semi-finished products during cutting Offset each other, so that the self-tapping screw semi-finished product will not be deformed and the cutting is stable; D. Finished product, the self-tapping screw finished product has a shaft, the shaft has a screw head at one end and a pointed tail at the other end, the shaft Up to the tip end surface a spiral thread having at least two, three or four spiral cutting grooves and cutting edges on the shaft, the tip end and the thread, the thread having a first pitch and the cutting groove having a second Pitch, and the second pitch is greater than the first pitch; E. cutting and retracting, the cutters perform displacement of the retracting tool, and retreat from the self-tapping screw finished product; F. unloading, the jig releases the self-tapping screw Finished goods. The method of processing a spiral cutting edge of a self-tapping screw according to claim 7, wherein the cutter is provided with a blade portion. A spiral cutting edge processing method for a self-tapping screw comprises the following steps: A. feeding, conveying a semi-finished product of a self-tapping screw to a fixture, the clamp clamping the semi-finished product of the self-tapping screw, the semi-finished product of the self-tapping screw has a shaft The shaft has a screw head at one end, a pointed tail at the other end, and a spiral thread on the shaft and the pointed tail; B. cutting into the knife, the outer circumference of the clamp extending in the direction of the center is equally divided into two , three or four tools to choose one, there is an angle between the tools, when the two tools are the angle is 180 degrees, when the three tools The angle is 120 degrees, when the angle is 90 degrees, the cutters are rotated at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product; C. the cutting starts, the clamp drives the self-tapping screws The semi-finished product is displaced, and the cutters are synchronized with the center rotation displacement of the self-tapping screw semi-finished product and the longitudinal axial feed displacement of the shaft, and the cutter shaft and the pointed tail shape are fed into the cutter to make the cutters Cutting at least two, three or four spiral cutting grooves and cutting edges on the tip end portion of the semi-finished screw semi-finished product, the shaft to the thread, and the angle between the tools is equally divided equally, so that the cutting is performed The force of the tool to the semi-finished products of the self-tapping screws cancels each other, so that the semi-finished products of the self-tapping screws are not deformed and the cutting is stable; D. The finished product, the self-tapping screw has a shaft, and the shaft has a screw head at one end. The other end has a pointed end, the shaft has a spiral thread on the surface of the tip end, and the shaft, the tip end portion and the thread have at least two, three or four spiral cutting grooves and Cutting edge, the thread has a pitch, the cutting groove has a second pitch, and the second pitch is greater than the first pitch; E. cutting and retracting, the tools perform retracting displacement, and retreating from the self-tapping screw finished product; F. cutting The clamp stops the feed displacement and releases the self-tapping screw finished product and performs the homing displacement. The method of processing a spiral cutting edge of a self-tapping screw according to claim 9, wherein the cutter is provided with a blade portion. A spiral cutting edge processing method for a self-tapping screw comprises the following steps: A. feeding, conveying a semi-finished product of a self-tapping screw to a fixture, the clamp clamping the semi-finished product of the self-tapping screw, the semi-finished product of the self-tapping screw has a shaft The shaft has a screw head at one end, a pointed tail at the other end, and a spiral thread on the shaft and the pointed tail; B. cutting into the knife, the outer circumference of the clamp extending in the direction of the center is equally divided into two Selecting three or four tools, the angle between the tools is 180 degrees when the tool is two, and the angle is 120 degrees when the tool is three. When the tool is four, the angle is 90 degrees, the cutters rotate at a high speed, and the synchronous feed displacement is close to the self-tapping screw semi-finished product; C. At the beginning of cutting, the clamp drives the self-tapping screw semi-finished product feed displacement to rotate at the same time, and the cutters are synchronized with the shaft The long axial feed displacement and the displacement of the shaft and the shape of the pointed tail shape enable the cutters to cut at least two, three or four on the tip end of the self-tapping screw semi-finished product and the shaft to the thread. Spiral The cutting groove and the cutting edge, the angle between the tools is equally divided equally, so that the force of the tools to the semi-finished products of the self-tapping screws cancels each other during cutting, so that the semi-finished products of the self-tapping screws are not deformed and the cutting is stable. D. Finished product, the self-tapping screw finished product has a shaft, the shaft has a screw head at one end and a pointed tail at the other end, and the shaft has a spiral thread on the surface of the tip end, the shaft body, The tip end portion and the thread have at least two, three or four spiral cutting grooves and cutting edges, the thread has a first pitch, the cutting groove has a second pitch, and the second pitch is greater than the first Pitch; E. Cutting and retracting, the tools retract the tool and retreat from the self-tapping screw; F. Unloading, the jig stops the feed displacement and rotation and releases the self-tapping screw finished product Home position displacement. The method of processing a spiral cutting edge of a self-tapping screw according to claim 11, wherein the cutter is provided with a blade portion.