Self drilling forming machine of range-extending type self drilling screw

Abstract

The invention relates to a self-drilling forming machine of an extended-range self-drilling screw, which is at least provided with a driving main shaft, the driving main shaft is sleeved with a suite group, the suite group is linked with a shifting assembly, a driving connecting rod is arranged on the shifting assembly in a penetrating manner, the other end of the driving connecting rod is connected with a rocker arm, one end of the rocker arm is connected with a pushing rod, and the other end of the rocker arm is connected with a pushing rod. A punch is arranged at the end part of the push rod; the shifting disc can be shifted by the external member group to rotate, and the pushing disc is linked with the driving connecting rod; after the shifting disc is shifted by the suite set to rotate, the shifting disc and the pushing disc can be attached or separated, and therefore the driving connecting rod can stretch out and draw back by a certain distance, and the punch can be driven to do a first stroke and a second stroke which are different in stroke. Therefore, the use effect of the self-drilling forming machine is improved, and the manufacturing cost of the self-drilling screw is reduced.

Description

Technical Field

[0001] The present invention relates to a drill tail forming machine, and more particularly to a drill tail forming machine for an extended-range drill tail screw. Background Art

[0002] As Figure 1 、 2 shown, the drill tail A1 (chip removal groove) of the drill tail screw A is formed by impact machining of a drill tail forming machine. Taking a double-stroke drill tail forming machine as an example, the main drive spindle 11 of the drill tail forming machine 1 can be rotated by a power unit (a driving motor or a hydraulic motor). The drive spindle 11 drives two drive linkages 12, and the drive linkages 12 push two rocker arms 13 to make relative swinging motions. The two rocker arms 13 can push a push rod 14 provided with a punch 15 to make a relative horizontal reciprocating motion. The blank of the drill tail screw A is stamped and formed into the drill tail A1 by a forming die provided on the punch 15.

[0003] As Figure 2 、 3 shown, in the above-mentioned conventional forming method of the drill tail A1 of the drill tail screw A, the stroke of the punch 15 driven by the drill tail forming machine 1 each time is fixed. For example, when drilling a drill tail screw A with a wire diameter of 4.4 mm, the drill tail forming machine 1 sets the stroke of the punch 15 each time to 4.4 mm. When the punch 15 makes the first 4.4 mm stroke, due to the problem of the material inside the metal wire, the first stroke of the punch 15 will cause the metal wire to be squeezed inward. The reaction force of the inward squeezing of the metal wire causes the punch 15 to not reach the 4.4 mm stroke for the first time. The drill tail forming machine 1 retracts the punch 15 and makes the second 4.4 mm stroke. At this time, the punch 15 completes the 4.4 mm stroke, and at the same time, the drill tail A1 is processed. With the above structure, the conventional drill tail forming machine 1 can surely punch the drill tail A1 on the drill tail screw A. However, the first stroke of the punch 15 will cause excessive inward squeezing of the metal wire, and the reaction force of the inward squeezing of the metal wire will reversely damage the cutting die inside the punch 15, resulting in the cutting die inside the punch 15 having to be frequently replaced. This will undoubtedly cause poor use effect of the drill tail forming machine 1 and increase the manufacturing cost of the drill tail screw A. Especially when the diameter of the metal wire is larger, the reaction force after extrusion is greater, and the damage to the cutting die inside the punch 15 is greater. It should be mentioned that when the composition of the metal wire is uneven and it contains a metal with a higher hardness, the reaction force after extrusion of the metal wire causes greater damage to the cutting die of the punch 15. Summary of the Invention

[0004] The main purpose of the present invention is to provide a drill tail forming machine for an extended-range self-drilling screw, mainly to overcome the defect that the knife die in the punch of the conventional drill tail forming machine is easily damaged by the reaction force of the over-punched self-drilling screw, thereby causing the manufacturing cost of the self-drilling screw to be unable to be reduced.

[0005] To this end, some technical means of the present invention provide a drilling tail forming machine for an extended-range drilling screw, the drilling tail forming machine at least having a driving spindle, the driving spindle sleeve is provided with a kit group, the kit group is connected to a toggle assembly, a driving connecting rod is passed through the toggle assembly, the other end of the driving connecting rod is connected to a rocker arm, one end of the rocker arm is connected to a push rod, and a punch is provided at the end of the push rod; the driving connecting rod at least has a shaft-penetrating portion, the kit group at least has a shaft hole portion, and the shaft-penetrating portion can be freely inserted into the shaft hole portion; the toggle assembly has a toggle The toggle plate and the push plate, the toggle plate is provided with a through hole, the push plate is provided with a through shaft hole, the toggle plate and the push plate are penetrated on the shaft portion of the driving connecting rod by means of the through hole and the shaft hole; the toggle plate can be toggled and rotated by the kit assembly, and the push plate is linked with the driving connecting rod; after the toggle plate is toggled and rotated by the kit assembly, the toggle plate and the push plate can be fitted or separated, so that the driving connecting rod can be extended and retracted by a certain distance, and then the punch can be driven to perform a first stroke and a second stroke with different strokes.

[0006] The present invention can achieve beneficial effects by means of some technical means: thereby improving the use efficiency of the drill tail forming machine and reducing the manufacturing cost of the drill screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a diagram of a self-drilling screw.

[0008] Figure 2 , Figure 3 This is a schematic diagram of the commonly used drill tail forming machine operation.

[0009] Figure 4 It is a schematic diagram of a drill tail forming machine of the present invention.

[0010] Figure 5 It is an exploded view of the driving spindle, the toggle assembly and the driving connecting rod of the present invention.

[0011] Figure 6 It is an assembled stereogram of the driving spindle, the shifting assembly and the driving connecting rod of the present invention.

[0012] Figure 7 It is an exploded view of the toggle assembly of the present invention.

[0013] Figure 8 , Figure 9 It is a schematic diagram of the mating of the toggle disk and the push disk of the toggle assembly of the present invention.

[0014] Figure 10 , Figure 11 It is a schematic diagram of the separation of the toggle disk and the push disk of the toggle assembly of the present invention.

[0015] Figure 12 , Figure 13 It is a schematic diagram of the first stroke action of the drill tail forming machine of the present invention.

[0016] Figure 14 , Figure 15 It is a schematic diagram of the second stroke action of the drill tail forming machine of the present invention.

[0017] Description of the figure number:

[0018] 1: Drill tail forming machine

[0019] 11: driving spindle 12: driving connecting rod

[0020] 13: Rocker arm 14: Push rod

[0021] 15: Punch

[0022] 2: Drill tail forming machine

[0023] 21: Machine

[0024] 3: Driving spindle

[0025] 3a: Eccentric part

[0026] 31: Kit Group

[0027] 31a: first half 31b: second half

[0028] 311: Shaft hole 312: Shift fork

[0029] 4: Toggle component

[0030] 41: Dial

[0031] 411: Push block 412: Raised rib

[0032] 413: Through hole

[0033] 42: Push plate

[0034] 421: Axis hole 422: Embedded groove

[0035] 4221: Deep groove 4222: Shallow groove

[0036] 5: Driving connecting rod

[0037] 51: Connection

[0038] 52: Shaft-through

[0039] 521: slot key

[0040] 6: Rocker arm

[0041] 61: Pivot

[0042] 7: Push rod

[0043] 8: Punch

[0044] A: Self-drilling screw A1: Self-drilling screw

[0045] B: Self-drilling screw B1: Self-drilling screw

[0046] T: first stroke T1: second stroke. DETAILED DESCRIPTION

[0047] First, see Figure 4 As shown, the present invention provides an extended-range self-drilling screw tail forming machine, the tail forming machine 2 at least has a driving spindle 3, a toggle assembly 4 connected to the driving spindle 3, a driving connecting rod 5 connected to the toggle assembly 4, one end of the driving connecting rod 5 is connected to a rocker arm 6, one end of each rocker arm 6 is connected to a push rod 7, and the end of each push rod 7 is provided with a punch 8. Among them, the toggle assembly 4, the driving connecting rod 5, the rocker arm 6, the push rod 7 and the punch 8 are all arranged in a left and right pair, and the following description is only described by the structure of a single component, which is explained in advance.

[0048] like Figure 4 , 5 As shown in Figures 6 and 7, one end of the driving spindle 3 is connected to a power unit, such as an electric motor or a hydraulic motor (not shown in the figure), so that the driving spindle 3 obtains a power source and can rotate; the driving spindle 3 is an eccentric rotating shaft, and two sets of kit groups 31 are sleeved on the driving spindle 3. The kit groups 31 have the same structure. The following description takes a single kit group 31 as an example; the kit group 31 has a first half body 31a and a second half body 31b. More specifically, the kit group 31 is locked on the eccentric portion 3a of the driving spindle 3 by locking the first half body 31a and the second half body 31b; the first half body 31a is provided with a shaft hole portion 311, and the outer periphery of the second half body 31b is protruded with a shift fork 312. The shift fork 312 of the present invention is exemplified by a pair of protruded at intervals.

[0049] like Figure 6 , 7, 8, 9, 10, and 11, the toggle assembly 4 comprises a toggle plate 41 and a push plate 42; a plurality of push blocks 411 are arranged at equal intervals on one side of the toggle plate 41, and a plurality of convex ribs 412 are arranged at equal intervals on the outer periphery of the other side of the toggle plate 41 away from the push block 411; a through hole 413 is arranged through the center of the toggle plate 41; a through-shaft hole 421 is arranged in the center of the push plate 42, and the push plate 42 is concavely disposed on the surface facing the toggle plate 41 A plurality of recessed embedding grooves 422 are provided, and the embedding grooves 422 correspond to and match the push block 411 of the dial 41; the embedding grooves 422 have different depths, and are divided into deep embedding grooves 4221 and shallow embedding grooves 4222 by depth, and the deep embedding grooves 4221 and the shallow embedding grooves 4222 are arranged in an interval manner. For example, the left and right sides of the deep embedding groove 4221 are provided with the shallow embedding grooves 4222, and similarly, the left and right sides of the shallow embedding groove 4222 are the deep embedding grooves 4221; thereby, when When the rib 412 of the toggle plate 41 is toggled by the fork 312 of the kit assembly 31 and rotates, the push block 411 of the toggle plate 41 can be embedded in the deep embedding groove 4221 or the shallow embedding groove 4222; for example, if the push block 411 of the toggle plate 41 is originally embedded in the deep embedding groove 4221, after the toggle plate 41 is toggled by the fork 312 of the kit assembly 31 and rotates, the push block 411 of the toggle plate 41 can be transferred from the original embedding in the deep embedding groove 4221 to the shallow embedding groove 4222. The shallow embedded groove 4222 is used to make the push plate 42 fit into or push away from the toggle plate 41. Furthermore, when the push block 411 of the toggle plate 41 is embedded in the deep embedded groove 4221, it is defined as a first stroke T; when the push block 411 of the toggle plate 41 is embedded in the shallow embedded groove 4222, it is defined as a second stroke T1. The travel distance of the second stroke T1 is greater than the first stroke T, whereby the second stroke T1 is an extended stroke relative to the first stroke T.

[0050] like Figure 4 , 5 As shown in Figure 6, one end of the driving connecting rod 5 has a connecting portion 51, and the driving connecting rod 5 has a through-shaft portion 52 at the other end of the connecting portion 51; the connecting portion 51 can be connected to the rocker arm 6; the through-shaft portion 52 can be axially arranged for the toggle plate 41 and the pushing plate 42 of the toggle assembly 4, wherein the pushing plate 42 and the through-shaft portion 52 are connected by a slot key 521, so that the pushing plate 42 can be linked to the driving connecting rod 5, and the through-shaft portion 52 passes through the toggle plate 41 of the toggle assembly 4 and is axially supported in the shaft hole portion 311 of the kit assembly 31.

[0051] like Figure 4As shown, the rocker arm 6 has a pivot portion 61. The rocker arm 6 is pivotally mounted on the machine table 21 of the self-drilling screw forming machine 2 by means of the pivot portion 61. Thus, the rocker arm 6 can swing freely with the pivot portion 61 as the swing center; below the pivot portion 61 of the rocker arm 6, it is connected to the connecting portion 51 of the driving link 5, and above the pivot portion 61 of the rocker arm 6, the push rod 7 can be connected. Therefore, when the driving main shaft 3 rotates and drives the driving link 5 to act through the kit group 31, the driving link 5 can push the lower end side of the rocker arm 6, and then make the upper end of the rocker arm 6 swing in the direction relative to the lower end, so as to push the push rod 7 to perform a reciprocating motion.

[0052] As Figure 4 shown, one end of the push rod 7 is connected to the upper end of the rocker arm 6. Thus, after the rocker arm 6 is driven to swing, it can push the push rod 7 to perform a reciprocating motion on the machine table 21.

[0053] As Figure 4 shown, the punch 8 is provided at one end of the push rod 7. More specifically, it is provided at the opposite end of the push rod 7 away from the connection end of the push rod 7 and the rocker arm 6; a cutting die (not shown in the figure) is provided on the punch 8. In the present invention, the cutting die is implemented with tungsten steel material. Thus, after the punch 8 and the push rod 7 are synchronously pushed by the rocker arm 6, the drill tail B1 of the self-drilling screw B can be punched to form a chip removal groove.

[0054] As Figure 8 、 9 As shown in FIGS. 12 and 13, in a specific embodiment of the present invention, taking the stroke of the metal wire of the self-drilling screw B to complete the stroke of the drill tail B1 as 4.4 mm as an example; the first stroke T of the present invention is designed to be 2.9 mm, that is, when the driving main shaft 3 rotates and drives the driving link 5 to act through the kit group 31, the driving link 5 can push the lower end side of the rocker arm 6, and then make the upper end of the rocker arm 6 swing in the direction relative to the lower end, so as to push the push rod 7 and the punch 8 towards the drill tail B1 of the self-drilling screw B for a stroke. At the same time, the push block 411 of the toggle disk 41 is embedded in the deep groove 4221 of the push disk 42, that is, the toggle disk 41 and the push disk 42 are in a fitting state. Therefore, the stroke of the punch 8 is limited to 2.9 mm, rather than 4.4 mm. Thus, although the cutting die of the punch 8 forms a forging extrusion on the drill tail B1 of the self-drilling screw B, it will not cause the drill tail B1 of the self-drilling screw B to be over-extruded to form a reaction force to damage the cutting die of the punch 8.

[0055] As Figure 10 、 11As shown in FIGS. 14 and 15, after the drilling tail forming machine 2 completes the 2.9 mm stroke of the first stroke T, the elastic component (not shown in the figure) provided at the connection between the push rod 7 and the rocker arm 6 of the drilling tail forming machine 2 pushes back the push rod 7, thereby the punch 8 also leaves the drilling tail B1 of the drilling screw B; at this time, the driving spindle 3 continues to rotate and then drives the driving connecting rod 5 to move through the kit assembly 31, and at the same time, the convex rib 412 of the dial plate 41 can be moved by the fork 312 of the kit assembly 31, so that the push block 411 of the dial plate 41 is transferred from the deep embedding groove 4221 originally embedded in the pushing plate 42 to the shallow embedding groove 42 22, so that the pushing plate 42 pushes the shallow embedded groove 4222 of the pushing plate 42 by the pushing block 411, so that the pushing plate 42 is pushed away by the dial plate 41; when the pushing plate 42 is pushed away, it can drive the driving connecting rod 5 as a whole to move a certain distance toward the side away from the driving main shaft 3. Further, the through-shaft portion 52 of the driving connecting rod 5 slides outward from the shaft hole portion 311 of the kit assembly 31, and the distance that the driving connecting rod 5 slides to one side is the depth difference between the deep embedded groove 4221 and the shallow embedded groove 4222. The depth difference between the deep embedded groove 4221 and the shallow embedded groove 4222 of the present invention is 1.5 mm. Accordingly, After the push plate 42 is pushed away, the driving connecting rod 5 can be driven to move a certain distance of 1.5 mm toward the side away from the driving main shaft 3. In other words, the distance between the center point of the connecting portion 51 of the driving connecting rod 5 and the center point of the driving main shaft 3 increases by 1.5 mm, or the driving connecting rod 5 extends by 1.5 mm. As a result, the driving connecting rod 5 pushes the lower end side of the rocker arm 6 by an increased distance of 1.5 mm, thereby causing the upper end of the rocker arm 6 to swing relative to the lower end, and the push rod 7 and the punch 8 to move toward the drilling B1 of the drilling screw B by an increased stroke of 1.5 mm. This is the second stroke T1 of the present invention. The stroke of the first stroke T of the present invention is 2.9 mm, and the stroke of the second stroke T1 is 1.5 mm more than the first stroke T of 2.9 mm. Therefore, the first stroke T plus the second stroke T1 is 4.4 mm in total, which is the stroke of 4.4 mm to be formed for the drill tail B1 of the drill screw B. By using the above-mentioned two different strokes of the first stroke T and the second stroke T1, a fixed stroke is avoided, so that the reaction force of excessive extrusion of the drill tail B1 of the drill screw B causes damage to the knife die in the punch 8, thereby improving the use efficiency of the drill tail forming machine 2 and reducing the manufacturing cost of the drill screw B.

[0056] The effect of the present invention is that the drilling tail forming machine 2 at least has a driving spindle 3, the driving spindle 3 is sleeved with a kit group 31, the kit group 31 is connected to a toggle assembly 4, the toggle assembly 4 is provided with a driving connecting rod 5, the other end of the driving connecting rod 5 is connected to a rocker arm 6, and the rocker arm 6 is connected to a push rod 7 at one end, and the end of the push rod 7 is provided with a punch 8; the driving connecting rod 5 at least has a through-shaft portion 52, the kit group 31 at least has a shaft hole portion 311, and the through-shaft portion 52 can freely penetrate into the shaft hole portion 311; the toggle assembly 4 has a toggle plate 41 and a push plate 42, the toggle plate 41 is provided with a through hole 413, and the push plate 42 is provided with a The through-shaft hole 421 is penetrated, and the toggle plate 41 and the pushing plate 42 are penetrated on the through-shaft portion 52 of the driving connecting rod 5 through the through-hole 413 and the through-shaft hole 421; the toggle plate 41 can be toggled and rotated by the kit group 31, and the pushing plate 42 is linked with the driving connecting rod 5; after the toggle plate 41 is toggled and rotated by the kit group 31, the toggle plate 41 and the pushing plate 42 can be fitted or separated, so that the driving connecting rod 5 can be extended and retracted for a certain distance, and then the punch 8 can be driven to perform the first stroke T and the second stroke T1 of different strokes; thereby, the use efficiency of the drilling tail forming machine 2 is improved, and the manufacturing cost of the drilling screw B is reduced.

Claims

1. A drilling and forming machine for extended-range self-drilling screws. It is characterized in that The drilling tail forming machine at least has a driving spindle, the driving spindle sleeve is provided with a kit group, the kit group is connected with a toggle assembly, the toggle assembly is provided with a driving connecting rod, the other end of the driving connecting rod is connected with a rocker arm, and one end of the rocker arm is connected with a push rod, and the end of the push rod is provided with a punch; the driving connecting rod at least has a shaft-penetrating portion, the kit group at least has a shaft hole portion, and the shaft-penetrating portion can be freely penetrated into the shaft hole portion; the toggle assembly has a toggle plate and a push plate, and the toggle plate is provided with a through-penetrating The push plate is provided with a through-hole, and the toggle plate and the push plate are penetrated on the through-shaft portion of the driving connecting rod by means of the through-hole and the through-shaft hole; the toggle plate can be toggled and rotated by the kit assembly, and the push plate is linked with the driving connecting rod; after the toggle plate is toggled and rotated by the kit assembly, the toggle plate and the push plate can be fitted or separated, so that the driving connecting rod can be extended and retracted by a certain distance, and then the punch can be driven to perform a first stroke and a second stroke of different strokes.

2. The extended-range self-drilling screw forming machine according to claim 1, It is characterized in that in, A shift fork is convexly arranged on the outer periphery of the kit set; a plurality of push blocks are arranged at equal intervals on one side of the toggle disk, and a plurality of convex ribs are arranged at equal intervals on the outer periphery of the other side away from the push block surface; the kit set uses the shift fork to toggle the convex rib of the toggle disk to rotate the toggle disk.

3. The extended-range self-drilling screw forming machine according to claim 1 or 2, It is characterized in that in, A plurality of the pushing blocks are arranged at equal intervals on one side of the toggle plate; a plurality of recessed grooves are arranged at intervals on the push plate surface facing the toggle plate, and the recessed grooves correspond to and match the pushing blocks of the toggle plate; the recessed grooves have different depths, and are divided into deep recessed grooves and shallow recessed grooves by depth, and the deep recessed grooves and the shallow recessed grooves are arranged at intervals.

4. The extended-range self-drilling screw forming machine according to claim 3, It is characterized in that in, When the push block of the toggle plate is embedded in the deep embedding groove, a first stroke is defined; when the push block of the toggle plate is embedded in the shallow embedding groove, a second stroke is defined.

5. The extended-range self-drilling screw forming machine according to claim 1 or 4, It is characterized in that in, The travel distance of the second stroke is greater than that of the first stroke.

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