Fastener center hole full-automatic machining equipment

Abstract

The invention discloses fastener center hole full-automatic machining equipment, and particularly relates to the technical field of fastener machining, the fastener center hole full-automatic machining equipment comprises a base, a supporting longitudinal frame is fixedly mounted at the top end of the base, a middle seat is fixedly mounted at the top end of the supporting longitudinal frame, and a transposition frame is rotatably mounted in the middle of the middle seat; four material placing mechanisms distributed in an annular array are arranged at the top of the transposition frame, a machining mechanism is fixedly mounted at the top end of the middle seat at the position of one material placing mechanism, and a discharging groove is formed in the side, away from the machining mechanism, of the middle seat; each material placing mechanism comprises a material placing outer frame, and a turnover shaft is fixedly mounted on the outer side of the material placing outer frame. According to the automatic positioning and clamping device, the positions of the four material placing mechanisms are sequentially adjusted by arranging the transposition frame, a fastener blank can be automatically positioned and clamped, clamping and positioning of the fastener blank are lost, and the fastener can be turned over and automatically discharged; and the overall machining efficiency of the center hole of the fastener is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fastener processing, in particular to a fully automatic processing device for a fastener center hole. Background Art

[0002] Fasteners are an important type of structural parts used to connect and fix different components in the industrial and construction fields. Common fasteners include bolts, screws, nuts, washers, etc. Their main functions are to provide mechanical connection, carry loads and ensure the stability of the structure.

[0003] When fasteners are processed and produced, the center hole of the fastener blank needs to be processed. The traditional center hole processing technology of fastener blanks is mostly processed in the form of turning or milling. The fastener blank is manually positioned in the fixture and processed using a turning head or a milling head. Among them, when milling the threaded inner hole, in order to improve the processing accuracy, the milling depth of the milling head needs to be gradually increased. Therefore, the center hole thread groove of a fastener blank needs to be milled several times, and milling errors are easy to occur. Secondly, manual material return is required after processing, which is inefficient. For this reason, we propose a fully automatic processing equipment for the center hole of fasteners to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a fully automatic processing device for the center hole of a fastener to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fully automatic processing device for the center hole of a fastener, comprising a base, a supporting longitudinal frame is fixedly installed on the top of the base, a middle seat is fixedly installed on the top of the supporting longitudinal frame, a transfer frame is rotatably installed in the middle of the middle seat, four material placement mechanisms distributed in a circular array are arranged on the top of the transfer frame, a processing mechanism is fixedly installed on the top of the middle seat at the position of one of the material placement mechanisms, and a material discharge trough is opened on the side of the middle seat away from the processing mechanism;

[0006] The material placement mechanism includes a material placement outer frame, a flip shaft is fixedly installed on the outer side of the material placement outer frame, the material placement mechanism is rotatably installed on the top of the indexing frame through the flip shaft, a support block is fixedly installed on the side of the outer wall of the material placement outer frame away from the flip shaft, a support ring is fixedly clamped on the inner bottom of the material placement outer frame, a positioning piece is fixedly installed on the top of the support ring, a plurality of mounting frames distributed in a ring array are fixedly installed on the top of the material placement outer frame, and a material buffer tube is fixedly installed between the plurality of mounting frames.

[0007] Preferably, the positioning member includes a positioning ring frame, which is fixedly mounted on the top of the supporting ring, and a plurality of positioning sliders distributed in a ring array are slidingly clamped on the inner bottom of the positioning ring frame, and the opposite ends of the plurality of positioning sliders extend into the positioning ring frame, and a driving ring frame is rotatably mounted on the middle part of the inner wall of the positioning ring frame, and a planar threaded protrusion is integrally formed on the lower surface of the driving ring frame, and a planar threaded groove used in conjunction with the planar threaded protrusion is opened on the upper surface of the positioning slider, and the planar threaded protrusion is movably clamped in the corresponding planar threaded groove, and a driven gear ring is fixedly mounted on the top of the driving ring frame, and a driving gear is meshedly connected to the outer side of the driven gear ring, and a driving shaft is fixedly mounted on the middle part of the driving gear, and the driving shaft is rotatably mounted on the positioning ring frame, and the top of the driving shaft extends out of the top of the positioning ring frame, and a first gear is fixedly mounted on the top of the driving shaft.

[0008] Preferably, a first worm wheel is fixedly installed on one side of the flip shaft close to the material placing outer frame, a first worm is meshingly connected to the outer side of the first worm wheel, a rotating frame is rotatably installed on the top and bottom of the first worm, the rotating frame is fixedly installed on the outer side of the transfer frame, and a second gear is fixedly installed on the bottom end of the first worm.

[0009] Preferably, an arc-shaped support frame is provided at the top of the middle seat away from the side of the discharge chute, the center position of the arc-shaped support frame vertically corresponds to the axis position of the transfer frame, and a first frame is fixedly installed at the bottom end of the arc-shaped support frame, and the first frame is fixedly installed at the top of the middle seat, and the upper surface of the arc-shaped support frame contacts the lower surface of the support block in the material placing mechanism at the corresponding position.

[0010] Preferably, a first arcuate outer rack and an arcuate inner rack are respectively provided at both sides of the processing mechanism, the first arcuate outer rack and the arcuate inner rack cooperate with the first gear, the outer side of the first arcuate outer rack can be meshed and connected with the first gear in the material placing mechanism at the corresponding position, the inner side of the arcuate inner rack can be meshed and connected with the first gear in the material placing mechanism at the corresponding position, the center positions of the first arcuate outer rack and the arcuate inner rack are vertically corresponding to the axial position of the transfer frame, a second frame is fixedly installed on the inner side of the first arcuate outer rack, the second frame passes through the transfer frame and is fixedly installed on the top of the base, a third frame is fixedly installed on the top of the arcuate inner rack, the third frame passes through the transfer frame and is fixedly installed on the top of the base.

[0011] Preferably, second arc-shaped racks are provided on both sides of the discharge chute, the second arc-shaped racks and the second gear are used in conjunction with each other, the outer side of the second arc-shaped rack can be meshed and connected with the second gear in the material placement mechanism at the corresponding position, and the bottom end of the second arc-shaped rack is fixedly installed with a fourth frame, and the fourth frame is fixedly installed on the top of the middle seat.

[0012] Preferably, the processing mechanism includes a mechanism longitudinal frame, the mechanism longitudinal frame is fixedly installed on the top of the middle seat, a first telescopic cylinder is vertically installed on the top of the mechanism longitudinal frame, a mounting longitudinal frame is fixedly installed on the driving end of the first telescopic cylinder, a second telescopic cylinder is fixedly installed on the middle part of the mounting longitudinal frame, a rotating motor is fixedly installed on the driving end of the second telescopic cylinder, a milling tool holder is fixedly installed on the driving end of the rotating motor, and a first cutter head, a second cutter head and a third cutter head are fixedly installed on the side ends of the milling tool holder by bolts.

[0013] Preferably, the third cutter head is located above the second cutter head, and the outer extension of the third cutter head is greater than the outer extension of the second cutter head; the second cutter head is located above the first cutter head, and the outer extension of the second cutter head is greater than the outer extension of the first cutter head.

[0014] Preferably, cooling nozzles are provided above the first cutter head, the second cutter head and the third cutter head, a liquid guide main pipe is fixedly installed in the milling tool holder, liquid guide branches corresponding to the cooling nozzles are fixedly installed on the liquid guide main pipe, and the ends of the liquid guide branches are fixedly installed with the corresponding cooling nozzles.

[0015] Preferably, the bottom of the transfer frame extends out of the bottom end of the middle seat and is fixedly installed with a second worm wheel, the outer side of the second worm wheel is meshingly connected with a second worm, the second worm is rotatably installed on the bottom end of the middle seat, and a drive motor is fixedly installed on one side of the bottom end of the middle seat close to the second worm, and the driving end of the drive motor is fixedly installed on one end of the second worm.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting the indexing frame, the positions of the four material placement mechanisms are adjusted in sequence, and the fastener blank can be automatically positioned and clamped, and the fastener blank can be made to lose the clamping position, and the fastener can be turned over and automatically unloaded, thereby improving the overall processing efficiency of the fastener center hole.

[0018] 2. By setting up and using the processing mechanism, the automatic three-stage milling of the center hole of the fastener blank can be achieved at one time, without the need to gradually increase the milling depth of the milling cutter head, thereby improving the quality and effect of milling, thereby improving the processing efficiency of the center hole of the fastener blank.

[0019] 3. By setting up a processing mechanism, the first cutter head, the second cutter head and the third cutter head can be cooled while milling, thereby preventing the first cutter head, the second cutter head and the third cutter head from being damaged during milling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention.

[0022] Figure 2 It is a connection diagram of some structures in the present invention.

[0023] Figure 3 It is a connection diagram of some structures in the present invention from another angle.

[0024] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle.

[0025] Figure 5 It is a structural schematic diagram of the material placing mechanism in the present invention.

[0026] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle.

[0027] Figure 7 It is a schematic diagram of the structure of the positioning member in the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of the positioning member from another angle in the present invention.

[0029] Fig. 9 It is a structural schematic diagram of the processing mechanism in the present invention.

[0030] Fig.10 For the present invention Fig. 9 Enlarged view of point C in the middle.

[0031] In the figure: 1, base; 11, supporting longitudinal frame; 12, middle seat; 101, unloading trough; 2, transfer frame; 21, second worm gear; 22, second worm; 23, driving motor; 3, material placement mechanism; 4, processing mechanism; 5, arc-shaped support frame; 51, first frame; 6, first arc-shaped outer rack; 61, arc-shaped inner rack; 62, second frame; 63, third frame; 7, second arc-shaped rack; 71, fourth frame; 31, material placement outer frame; 32, turning axis; 321, first worm gear; 322, first worm; 323, rotating frame; 324, second gear; 33 , support block; 34, support ring; 35, positioning piece; 36, mounting frame; 37, material buffer tube; 351, positioning ring frame; 352, positioning slider; 353, driving ring frame; 354, driven gear ring; 355, driving gear; 356, driving shaft; 357, first gear; 41, mechanism longitudinal frame; 42, first telescopic cylinder; 43, mounting longitudinal frame; 44, second telescopic cylinder; 441, rotating motor; 45, milling tool holder; 46, first cutter head; 461, second cutter head; 462, third cutter head; 47, cooling nozzle; 48, liquid guide main pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example: Figure 1-10 As shown, the present invention provides a fully automatic processing equipment for the center hole of a fastener, comprising a base 1, a supporting longitudinal frame 11 is fixedly installed on the top of the base 1, a middle seat 12 is fixedly installed on the top of the supporting longitudinal frame 11, a transfer frame 2 is rotatably installed in the middle of the middle seat 12, the transfer frame 2 is convenient for rotating in the middle of the middle seat 12, and four feeding mechanisms 3 distributed in a circular array are arranged on the top of the transfer frame 2; the bottom of the transfer frame 2 extends out of the bottom end of the middle seat 12 and is fixedly installed with a second worm gear 21, the outer side of the second worm gear 21 is meshingly connected with a second worm 22, the second worm 22 is rotatably installed on the bottom end of the middle seat 12, a driving motor 23 is fixedly installed on one side of the bottom end of the middle seat 12 close to the second worm 22, the driving end of the driving motor 23 and one end of the second worm 22 are fixedly installed, the driving motor 23 is controlled to start, the second worm 22 is driven to drive the second worm gear 21 to rotate, thereby controlling the transfer frame 2 to rotate, and then driving the four feeding mechanisms 3 to rotate, thereby adjusting the positions of the four feeding mechanisms 3 in sequence;

[0034] A processing mechanism 4 is fixedly installed on the top of the middle seat 12 at the position of one of the material placement mechanisms 3, and a material discharge trough 101 is provided on the side of the middle seat 12 away from the processing mechanism 4. The corresponding positions of the material placement mechanisms 3 on both sides of the processing mechanism 4 are respectively set as a loading station and a turning station;

[0035] The feeding mechanism 3 includes a feeding outer frame 31, and a flip shaft 32 is fixedly installed on the outer side of the feeding outer frame 31. The feeding mechanism 3 is rotatably installed on the top of the indexing frame 2 through the flip shaft 32. By controlling the rotation of the flip shaft 32, the feeding mechanism 3 can be driven to flip, which is convenient for subsequent automatic unloading. A support block 33 is fixedly installed on the side of the outer wall of the feeding outer frame 31 away from the flip shaft 32, and a support ring 34 is fixedly clamped on the inner bottom of the feeding outer frame 31. A positioning piece 35 is fixedly installed on the top of the support ring 34. A plurality of mounting frames 36 distributed in a ring array are fixedly installed on the top of the feeding outer frame 31, and a slow-feeding tube 37 is fixedly installed between the plurality of mounting frames 36.

[0036] The positioning member 35 includes a positioning ring frame 351, which is fixedly mounted on the top of the support ring 34. A plurality of positioning sliders 352 distributed in a ring array are slidably clamped on the inner bottom of the positioning ring frame 351. The opposite ends of the plurality of positioning sliders 352 extend into the positioning ring frame 351. A driving ring frame 353 is rotatably mounted on the middle part of the inner wall of the positioning ring frame 351. A plane threaded protrusion is integrally formed on the lower surface of the driving ring frame 353. A plane threaded groove used in conjunction with the plane threaded protrusion is provided on the upper surface of the positioning slider 352. The plane threaded protrusion is movably clamped in the corresponding plane threaded groove. A driven gear ring 354 is fixedly mounted on the top of the driving ring frame 353. A driving gear 355 is meshedly connected to the outer side of the driven gear ring 354. A driving shaft is fixedly mounted on the middle part of the driving gear 355. 356, the driving shaft 356 is rotatably installed on the positioning ring frame 351, and the top of the driving shaft 356 extends out of the top of the positioning ring frame 351. The top of the driving shaft 356 is fixedly installed with a first gear 357. By controlling the first gear 357 to rotate, the driving shaft 356 and the driving gear 355 drive the driven gear ring 354 and the driving ring frame 353 to rotate, and the plane thread convex is movably engaged in the corresponding plane thread groove to drive the multiple positioning sliders 352 to move toward each other. On the contrary, by controlling the first gear 357 to rotate in the opposite direction, the driving shaft 356 and the driving gear 355 drive the driven gear ring 354 and the driving ring frame 353 to rotate in the opposite direction, and the plane thread convex is movably engaged in the corresponding plane thread groove to drive the multiple positioning sliders 352 to move in the opposite direction.

[0037] A first worm gear 321 is fixedly installed on one side of the flip shaft 32 close to the material placing outer frame 31, and a first worm 322 is meshedly connected to the outer side of the first worm gear 321. A rotating frame 323 is rotatably installed on the top and bottom of the first worm gear 322. The rotating frame 323 is fixedly installed on the outer side of the transfer frame 2, and a second gear 324 is fixedly installed on the bottom end of the first worm gear 322. The first worm gear 322 is driven to rotate by controlling the second gear 324 to drive the first worm gear 321 to rotate, thereby controlling the flip shaft 32 to rotate.

[0038] An arc-shaped support frame 5 is provided at the top of the middle seat 12 away from the side of the discharge trough 101, and the center position of the arc-shaped support frame 5 is vertically corresponding to the axis position of the transfer frame 2. A first frame 51 is fixedly installed at the bottom end of the arc-shaped support frame 5, and the first frame 51 is fixedly installed at the top of the middle seat 12. The upper surface of the arc-shaped support frame 5 contacts the lower surface of the support block 33 in the material placing mechanism 3 at the corresponding position. By setting the arc-shaped support frame 5, the upper surface of the arc-shaped support frame 5 contacts the lower surface of the support block 33 in the material placing mechanism 3 at the corresponding position, thereby stably supporting the material placing mechanism 3 at the corresponding position.

[0039] The first arc-shaped outer rack 6 and the arc-shaped inner rack 61 are respectively provided at the two sides of the processing mechanism 4, and the first arc-shaped outer rack 6 and the arc-shaped inner rack 61 cooperate with the first gear 357 for use with each other. The outer side of the first arc-shaped outer rack 6 can be meshed and connected with the first gear 357 in the material placing mechanism 3 at the corresponding position, and the inner side of the arc-shaped inner rack 61 can be meshed and connected with the first gear 357 in the material placing mechanism 3 at the corresponding position. The center positions of the first arc-shaped outer rack 6 and the arc-shaped inner rack 61 are vertically corresponding to the axis position of the transfer frame 2. The second frame 62 is fixedly installed on the inner side of the first arc-shaped outer rack 6, and the second frame 62 passes through the transfer frame 2 and is fixedly installed on the top of the base 1. The top of the arc-shaped inner rack 61 is fixedly installed with a third frame 63, and the third frame 63 passes through the transfer frame 2 and is fixedly installed on the top of the base 1, and the first arc is performed. The installation and fixation of the arc-shaped outer rack 6 and the arc-shaped inner rack 61 are performed, and the fastener blank is placed in the feeding mechanism 3 at the loading station. The bottom of the fastener blank is placed on the upper surface of the support ring 34 and is located between multiple positioning sliders 352. By controlling the rotation of the feeding mechanism 3, when the feeding mechanism 3 is rotated from the loading station to the position of the processing mechanism 4, the first gear 357 in the feeding mechanism 3 is meshed with the outer side of the first arc-shaped outer rack 6, and the first arc-shaped outer rack 6 drives the first gear 357 in the feeding mechanism 3 to rotate. When the feeding mechanism 3 is controlled to rotate again, when the feeding mechanism 3 is rotated from the position of the processing mechanism 4 to the flipping station, the first gear 357 in the feeding mechanism 3 is meshed with the inner side of the arc-shaped inner rack 61, and the arc-shaped inner rack 61 drives the first gear 357 in the feeding mechanism 3 to rotate in the opposite direction.

[0040] Second arc-shaped racks 7 are provided on both sides of the unloading chute 101, and the second arc-shaped racks 7 and the second gear 324 cooperate with each other. The outer side of the second arc-shaped rack 7 can be meshed and connected with the second gear 324 in the feeding mechanism 3 at the corresponding position. The bottom end of the second arc-shaped rack 7 is fixedly installed with a fourth frame 71, and the fourth frame 71 is fixedly installed on the top of the middle seat 12. When the feeding mechanism 3 is controlled to rotate again and the feeding mechanism 3 is rotated from the flipping station position to the unloading chute 101, the second gear 324 in the feeding mechanism 3 is meshed and connected with the outer side of one of the second arc-shaped racks 7, and the second arc-shaped rack 7 drives the second gear 324 in the feeding mechanism 3 to rotate. When the feeding mechanism 3 is controlled to rotate again and the feeding mechanism 3 is rotated from the unloading chute 101 position to the loading station, the second gear 324 in the feeding mechanism 3 is meshed and connected with the outer side of another second arc-shaped rack 7, and the second arc-shaped rack 7 drives the second gear 324 in the feeding mechanism 3 to rotate again.

[0041] The processing mechanism 4 includes a mechanism longitudinal frame 41, which is fixedly mounted on the top of the middle seat 12, a first telescopic cylinder 42 is vertically mounted on the top of the mechanism longitudinal frame 41, a mounting longitudinal frame 43 is fixedly mounted on the driving end of the first telescopic cylinder 42, a second telescopic cylinder 44 is fixedly mounted in the middle of the mounting longitudinal frame 43, a rotating motor 441 is fixedly mounted on the driving end of the second telescopic cylinder 44, a milling tool holder 45 is fixedly mounted on the driving end of the rotating motor 441, and a first cutter head 46, a second cutter head 461 and a third cutter head 462 are fixedly mounted on the side ends of the milling tool holder 45 by bolts. The third cutter head 462 is located above the second cutter head 461, and the extension of the third cutter head 462 is greater than the extension of the second cutter head 461. The second cutter head 461 is located above the first cutter head 46, and the extension of the second cutter head 461 is greater than the extension of the first cutter head 46. When the material placement mechanism 3 carries the positioned fastener blank to rotate to the processing mechanism 4, the first telescopic cylinder 42 is controlled to start driving the milling tool holder 45 to drive the first cutter head 46, the second cutter head 461 and the third cutter head 462 to move horizontally, so that the first cutter head 46, the second cutter head 461 and The third cutter head 462 is moved to the top of the fastener blank, and the rotation axis of the rotary motor 441 is vertically aligned with the center position of the fastener blank. Subsequently, the rotary motor 441 is controlled to drive the milling tool holder 45 to rotate, thereby controlling the first cutter head 46, the second cutter head 461 and the third cutter head 462 to rotate. At the same time, the second telescopic cylinder 44 is controlled to drive the first cutter head 46, the second cutter head 461 and the third cutter head 462 to descend. Since the outer extension of the third cutter head 462 is greater than the outer extension of the second cutter head 461, the outer extension of the second cutter head 461 is The extension length is greater than that of the first cutter head 46, so that the first cutter head 46 first contacts the center position of the fastener blank for primary milling, and then the second cutter head 461 contacts the center position of the fastener blank and performs secondary milling on the basis of the primary milling, and then the third cutter head 462 contacts the center position of the fastener blank and performs automatic tertiary milling on the basis of the secondary milling, thereby realizing automatic tertiary milling of the center hole of the fastener blank at one time, without gradually advancing the milling depth of the milling head, thereby improving the quality and effect of milling, and thus improving the processing efficiency of the center hole of the fastener blank.

[0042] Cooling nozzles 47 are provided above the first cutter head 46, the second cutter head 461 and the third cutter head 462. A liquid guide main pipe 48 is fixedly installed in the milling tool holder 45. Liquid guide branches corresponding to the cooling nozzles 47 are fixedly installed on the liquid guide main pipe 48. The ends of the liquid guide branches are fixedly installed with the corresponding cooling nozzles 47. When in use, the end of the liquid guide main pipe 48 is connected to the output port of the coolant output system. While milling, the coolant output system is controlled to be turned on. The coolant is introduced into the cooling nozzles 47 through the liquid guide main pipe 48 and multiple liquid guide branches, and is sprayed on the first cutter head 46, the second cutter head 461 and the third cutter head 462 for cooling, thereby preventing the first cutter head 46, the second cutter head 461 and the third cutter head 462 from being damaged during milling.

[0043] Working principle: When in use, the end of the liquid guide pipe 48 is connected to the output port of the coolant output system, and the driving motor 23 is controlled to start, and the second worm 22 drives the second worm wheel 21 to rotate, thereby controlling the rotation of the indexing frame 2, and then driving the four material placement mechanisms 3 to rotate, so as to adjust the positions of the four material placement mechanisms 3 in turn, and the arc-shaped support frame 5 is used to stably support the material placement mechanisms 3 at the corresponding positions;

[0044] The fastener blank is placed in the material placement mechanism 3 at the loading station, and the bottom of the fastener blank is placed on the upper surface of the support ring 34 and is located between the multiple positioning slide blocks 352. By controlling the rotation of the material placement mechanism 3, when the material placement mechanism 3 is rotated from the loading station to the position of the processing mechanism 4, the first gear 357 in the material placement mechanism 3 is meshed with the outer side of the first arc-shaped external rack 6, and the first arc-shaped external rack 6 drives the first gear 357 in the material placement mechanism 3 to rotate, driving the driving shaft 356 and the driving gear 355 to drive the driven gear ring 354 and the driving ring frame 353 to rotate, and the plane thread convex is movably engaged in the corresponding plane thread groove, driving the multiple positioning slide blocks 352 to move toward each other, and automatically positioning the fastener blank;

[0045] Until it moves to the position of the processing mechanism 4, the first telescopic cylinder 42 is controlled to be turned on to drive the milling tool holder 45 to drive the first cutter head 46, the second cutter head 461 and the third cutter head 462 to move horizontally, so that the first cutter head 46, the second cutter head 461 and the third cutter head 462 are moved above the fastener blank, and the rotation axis of the rotating motor 441 is vertically corresponding to the center position of the fastener blank. Subsequently, the rotating motor 441 is controlled to be turned on to drive the milling tool holder 45 to rotate, thereby controlling the first cutter head 46, the second cutter head 461 and the third cutter head 462 to rotate. At the same time, the second telescopic cylinder 42 is controlled to be turned on to drive the milling tool holder 45 to rotate. The air cylinder 44 drives the first cutter head 46, the second cutter head 461 and the third cutter head 462 to descend. Since the outer extension of the third cutter head 462 is greater than the outer extension of the second cutter head 461, and the outer extension of the second cutter head 461 is greater than the outer extension of the first cutter head 46, the first cutter head 46 first contacts the center position of the fastener blank to perform primary milling, then the second cutter head 461 contacts the center position of the fastener blank and performs secondary milling on the basis of primary milling, then the third cutter head 462 contacts the center position of the fastener blank and performs automatic tertiary milling on the basis of secondary milling;

[0046] While milling, the coolant output system is controlled to be turned on, and the coolant is introduced into the cooling nozzle 47 through the liquid guide main pipe 48 and multiple liquid guide branches, and sprayed on the first cutter head 46, the second cutter head 461 and the third cutter head 462 for cooling, thereby preventing the first cutter head 46, the second cutter head 461 and the third cutter head 462 from being damaged during milling;

[0047] After the milling is completed, the first cutter head 46 and the second cutter head 461 in the processing mechanism 4 are controlled to reset and disengage from the fastener;

[0048] Subsequently, the material placing mechanism 3 is controlled to rotate again. When the material placing mechanism 3 is rotated from the position of the processing mechanism 4 to the flipping station, the first gear 357 in the material placing mechanism 3 meshes with the inner side of the arcuate inner rack 61. The arcuate inner rack 61 drives the first gear 357 in the material placing mechanism 3 to rotate in the opposite direction, driving the driving shaft 356 and the driving gear 355 to drive the driven gear ring 354 and the driving ring frame 353 to rotate in the opposite direction, and the plane thread protrusion is movably engaged in the corresponding plane thread groove, driving the multiple positioning slide blocks 352 to move in the opposite direction, and the fasteners after milling lose their positioning;

[0049] Then, the material placing mechanism 3 is controlled to rotate again. When the material placing mechanism 3 is rotated from the flipping station to the material discharge trough 101, the second gear 324 in the material placing mechanism 3 is meshed with the outer side of one of the second arc-shaped racks 7. The second arc-shaped rack 7 drives the second gear 324 in the material placing mechanism 3 to rotate, driving the first worm 322 to drive the first worm wheel 321 to rotate, thereby controlling the flip shaft 32 to rotate, driving the material placing mechanism 3 to flip, and the fastener flips and falls to automatically discharge the material;

[0050] Subsequently, the material placing mechanism 3 is controlled to rotate again. When the material placing mechanism 3 is rotated from the position of the unloading trough 101 to the loading station, the second gear 324 in the material placing mechanism 3 is meshed with the outer side of another second arc-shaped rack 7. The second arc-shaped rack 7 drives the second gear 324 in the material placing mechanism 3 to rotate again, so that the material placing mechanism 3 is flipped and reset again, thereby facilitating the subsequent positioning and clamping of the fastener blank for processing.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fully automatic processing device for the center hole of a fastener, comprising a base (1), characterized in that: A supporting longitudinal frame (11) is fixedly mounted on the top of the base (1), a middle seat (12) is fixedly mounted on the top of the supporting longitudinal frame (11), a transfer frame (2) is rotatably mounted in the middle of the middle seat (12), four material placement mechanisms (3) distributed in a circular array are arranged on the top of the transfer frame (2), a processing mechanism (4) is fixedly mounted on the top of the middle seat (12) at the position of one of the material placement mechanisms (3), and a material discharge trough (101) is provided on a side of the middle seat (12) away from the processing mechanism (4); The material placement mechanism (3) comprises a material placement outer frame (31), a flip shaft (32) is fixedly mounted on the outer side of the material placement outer frame (31), the material placement mechanism (3) is rotatably mounted on the top of the indexing frame (2) via the flip shaft (32), a support block (33) is fixedly mounted on the side of the outer wall of the material placement outer frame (31) away from the flip shaft (32), a support ring (34) is fixedly mounted on the inner bottom of the material placement outer frame (31), a positioning piece (35) is fixedly mounted on the top of the support ring (34), a plurality of mounting frames (36) distributed in a circular array are fixedly mounted on the top of the material placement outer frame (31), and a material buffer tube (37) is fixedly mounted between the plurality of mounting frames (36).

2. The fully automatic processing equipment for the center hole of a fastener according to claim 1, characterized in that: The positioning member (35) comprises a positioning ring frame (351), wherein the positioning ring frame (351) is fixedly mounted on the top of the support ring (34), and a plurality of positioning sliders (352) distributed in an annular array are slidably mounted on the inner bottom of the positioning ring frame (351), and the opposite ends of the plurality of positioning sliders (352) extend into the positioning ring frame (351), and a driving ring frame (353) is rotatably mounted on the middle part of the inner wall of the positioning ring frame (351), and a plane threaded protrusion is integrally formed on the lower surface of the driving ring frame (353), and a threaded protrusion that matches the plane threaded protrusion is provided on the upper surface of the positioning slider (352). The planar thread groove is used in combination with the planar thread groove, the planar thread protrusion is movably engaged in the corresponding planar thread groove, a driven gear ring (354) is fixedly installed on the top of the driving ring frame (353), the outer side of the driven gear ring (354) is meshingly connected with a driving gear (355), a driving shaft (356) is fixedly installed in the middle of the driving gear (355), the driving shaft (356) is rotatably installed on the positioning ring frame (351), the top of the driving shaft (356) extends out of the top of the positioning ring frame (351), and the top of the driving shaft (356) is fixedly installed with a first gear (357).

3. The fully automatic processing equipment for the center hole of a fastener according to claim 1, characterized in that: A first worm gear (321) is fixedly mounted on one side of the flip shaft (32) close to the material placement outer frame (31); a first worm (322) is meshingly connected to the outer side of the first worm gear (321); a rotating frame (323) is rotatably mounted on the top and bottom of the first worm (322); the rotating frame (323) is fixedly mounted on the outer side of the indexing frame (2); and a second gear (324) is fixedly mounted on the bottom end of the first worm (322).

4. The fully automatic processing equipment for the center hole of a fastener according to claim 1, characterized in that: An arc-shaped support frame (5) is provided at the top of the middle seat (12) at a position away from the side of the material discharge chute (101), the center position of the arc-shaped support frame (5) vertically corresponds to the axis position of the transfer frame (2), a first frame (51) is fixedly installed at the bottom end of the arc-shaped support frame (5), the first frame (51) is fixedly installed at the top of the middle seat (12), and the upper surface of the arc-shaped support frame (5) contacts the lower surface of the support block (33) in the material placement mechanism (3) at the corresponding position.

5. The fully automatic processing equipment for the center hole of a fastener according to claim 2, characterized in that: A first arc-shaped outer rack (6) and an arc-shaped inner rack (61) are respectively provided at two sides of the processing mechanism (4); the first arc-shaped outer rack (6) and the arc-shaped inner rack (61) cooperate with the first gear (357) for use; the outer side of the first arc-shaped outer rack (6) can be meshed and connected with the first gear (357) in the material placement mechanism (3) at the corresponding position; and the inner side of the arc-shaped inner rack (61) can be meshed and connected with the first gear (357) in the material placement mechanism (3) at the corresponding position. Then, the center positions of the first arc-shaped outer rack (6) and the arc-shaped inner rack (61) correspond vertically to the axis position of the transfer frame (2); a second frame (62) is fixedly installed on the inner side of the first arc-shaped outer rack (6); the second frame (62) passes through the transfer frame (2) and is fixedly installed on the top of the base (1); a third frame (63) is fixedly installed on the top of the arc-shaped inner rack (61); the third frame (63) passes through the transfer frame (2) and is fixedly installed on the top of the base (1).

6. The fully automatic processing equipment for the center hole of a fastener according to claim 3, characterized in that: Second arc-shaped racks (7) are provided at both sides of the material discharge chute (101); the second arc-shaped racks (7) and the second gear (324) are used in conjunction with each other; the outer side of the second arc-shaped rack (7) can be meshed and connected with the second gear (324) in the material placement mechanism (3) at the corresponding position; the bottom end of the second arc-shaped rack (7) is fixedly mounted with a fourth frame (71); the fourth frame (71) is fixedly mounted on the top end of the middle seat (12).

7. The fully automatic processing equipment for the center hole of a fastener according to claim 1, characterized in that: The processing mechanism (4) comprises a mechanism longitudinal frame (41), the mechanism longitudinal frame (41) is fixedly mounted on the top of the middle seat (12), a first telescopic cylinder (42) is vertically mounted on the top of the mechanism longitudinal frame (41), a mounting longitudinal frame (43) is fixedly mounted on the driving end of the first telescopic cylinder (42), a second telescopic cylinder (44) is fixedly mounted in the middle of the mounting longitudinal frame (43), a rotating motor (441) is fixedly mounted on the driving end of the second telescopic cylinder (44), a milling tool holder (45) is fixedly mounted on the driving end of the rotating motor (441), and a first cutter head (46), a second cutter head (461) and a third cutter head (462) are fixedly mounted on the side ends of the milling tool holder (45) by bolts.

8. The fully automatic processing equipment for the center hole of a fastener according to claim 7, characterized in that: The third cutter head (462) is located above the second cutter head (461), and the outer extension of the third cutter head (462) is greater than the outer extension of the second cutter head (461); the second cutter head (461) is located above the first cutter head (46), and the outer extension of the second cutter head (461) is greater than the outer extension of the first cutter head (46).

9. The fully automatic processing equipment for the center hole of a fastener according to claim 7, characterized in that: A cooling nozzle (47) is disposed above the first cutting head (46), the second cutting head (461) and the third cutting head (462); a liquid guide main pipe (48) is fixedly installed in the milling tool holder (45); liquid guide branch pipes corresponding to the cooling nozzle (47) are fixedly installed on the liquid guide main pipe (48); and ends of the liquid guide branch pipes are fixedly installed with corresponding cooling nozzles (47).

10. The fully automatic fastener center hole processing equipment according to claim 1, characterized in that: The bottom of the transfer frame (2) extends out of the bottom end of the middle seat (12) and is fixedly mounted with a second worm gear (21); the outer side of the second worm gear (21) is meshingly connected with a second worm (22); the second worm (22) is rotatably mounted on the bottom end of the middle seat (12); a driving motor (23) is fixedly mounted on one side of the bottom end of the middle seat (12) close to the second worm (22); the driving end of the driving motor (23) is fixedly mounted to one end of the second worm (22).

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