CN110666075A - Screw cold heading forming device - Google Patents
Screw cold heading forming device Download PDFInfo
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- CN110666075A CN110666075A CN201911130655.XA CN201911130655A CN110666075A CN 110666075 A CN110666075 A CN 110666075A CN 201911130655 A CN201911130655 A CN 201911130655A CN 110666075 A CN110666075 A CN 110666075A
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- 230000007246 mechanism Effects 0.000 claims abstract description 99
- 238000005096 rolling process Methods 0.000 claims abstract description 72
- 238000012546 transfer Methods 0.000 claims abstract description 31
- 238000004080 punching Methods 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 21
- 238000005520 cutting process Methods 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 238000010008 shearing Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000003068 static effect Effects 0.000 description 8
- 235000013057 Chorispora tenella Nutrition 0.000 description 5
- 241001118070 Chorispora tenella Species 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F5/00—Upsetting wire or pressing operations affecting the wire cross-section
- B21F5/005—Upsetting wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F23/00—Feeding wire in wire-working machines or apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other
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Abstract
The invention discloses a screw cold heading forming device which comprises a rack, wherein a heading module, a punch module, a transfer mechanism and a thread rolling mechanism are arranged on the rack; the heading die set comprises a first die position and a second die position, wherein the first die position is used for mounting a first punching die, and the second die position is used for mounting a second punching die; the punch die set comprises a first punch and a second punch which are matched with the first die position and the second die position respectively; one pier head can be formed at one end of the blank through the matching of the first punch head and the first die, and the other pier head can be formed at the other end of the blank through the matching of the second punch head and the second die; the thread rolling mechanism is butted with the output end of the second die position through a blanking channel and is used for performing thread rolling operation on the blank; by adopting the screw cold heading forming device, only one complete processing flow is needed, the hammering and final thread rolling work of the two ends of the blank can be completed, equipment does not need to be replaced in the middle, and not only is the production cost low, but also the production efficiency is high.
Description
Technical Field
The invention relates to the technical field of screw forging processing equipment, in particular to a screw cold heading processing and forming device.
Background
The screw is a commonly used connecting piece, and simplest screw structure includes a pier head and a lead screw, and to the screw that some special occasions used, like furniture equipment, need two pier heads of both ends shaping at the lead screw, rub tooth on the side of one of them pier head, some still need beat the cross on two pier head upper end walls. In order to achieve the purpose, in the processing technology of the screw, a cold heading machine is generally adopted to process a blank into a blank with only one end provided with a cross-shaped heading and a head-middle shape, then the blank is used for heading the cross-shaped heading at the tail part by an opening and closing mould machine, finally the blank is used for rubbing out teeth and knurling by a thread rolling machine, the cold heading machine in the market at present can only use a cam to press and then upset the tail part, but can not be upset into a double-head cross flower and a thread rolling, only one end of the blank can be upset into a single-head cross flower and two ends can be upset, and this head of afterbody can be askew, if form both ends and all have pier nose, cross flower, thread rolling, still need use another clapper die spotting press, another thread rolling machine and upset out cross flower and thread rolling with the afterbody of blank again, can not reach directly through the purpose that a cold heading machine formed pier nose or further beaten the cross flower with both ends of blank to cause high in production cost, and production efficiency is low moreover.
Disclosure of Invention
The invention aims to solve the technical problem and provide a screw cold heading forming device which can upset the two ends of a screw blank into various required head shapes and thread.
In order to achieve the purpose, the invention discloses a screw cold heading forming device which comprises a rack, wherein a heading module, a punch module, a transfer mechanism and a thread rolling mechanism are arranged on the rack; the punch die set can reciprocate relative to the heading and punching die to feed the blank into the heading and punching die and hit the blank therein so as to obtain a required head shape; the heading die set comprises a first die position and a second die position, wherein the first die position is used for mounting a first punching die, and the second die position is used for mounting a second punching die; the punch die set comprises a first punch and a second punch which are matched with the first die position and the second die position respectively; a pier head can be formed at one end of the blank through the matching of the first punch and the first die, and another pier head can be formed at the other end of the blank through the matching of the second punch and the second die; the transfer mechanism is used for transferring the blank among the stations according to the processing procedure; and the thread rolling mechanism is butted with the output end of the second die position through a blanking channel and is used for performing thread rolling operation on the blank.
Compared with the prior art, the screw cold heading forming device comprises a first die position and a second die position arranged in a heading die set arranged on a frame, and a first punch and a second punch matched with the first punch are arranged on the opposite side of the heading die set, when the screw cold heading forming device works, firstly, a blank to be processed is placed between a first punching die and the first punch by a transfer mechanism, then the first punch moves towards the first punching die to push the blank into the first punching die, one end of the blank is hammered into a pier head with a required structure in the first punching die under the jacking action force of the first punch, then the blank is pushed out of the first punching die and is transferred between a second punching die and the second punch by the transfer mechanism, then the blank is pushed into the second punching die by the second punch and is hammered on the other end of the blank, so that a pier head with a required structure is formed at the other end of the blank, and then the blank with the both ends being molded into which the pier head falls into a tooth rubbing mechanism through a blanking channel, the thread rolling mechanism forms a screw with a required structure and screw threads after the blank is rolled; according to the processing process, the pier striking and the final thread rolling work at the two ends of the blank can be finished through a complete processing flow on one device, the device does not need to be replaced in the middle, the production cost is low, and the production efficiency is high.
Preferably, the first die position is located at a front end station of the second die position, a baffle is arranged on one side of the second die position opposite to the second punch, a forming die matched with a head shape of a screw to be processed is arranged on the baffle, and after the second punch feeds a blank into the second die, the rear end of the blank is formed into a pier in the forming die.
Preferably, the baffle is further provided with a cutting die, the cutting die is used for machining a pattern on the pier head of the blank, and the baffle can reciprocate relative to the second die position so as to alternately align the cutting die and the pattern die with the second punching die.
Preferably, the rack is provided with a first driving mechanism for driving the baffle to reciprocate in the vertical direction, the first driving mechanism comprises an upper connecting rod, a lower connecting rod and a driving frame, the driving frame can transversely reciprocate under the driving of the main transmission mechanism on the rack, the upper end of the upper connecting rod is connected with the baffle, one end of the lower connecting rod is pivoted with the lower end of the upper connecting rod, the other end of the lower connecting rod is connected with a sliding block arranged in the driving frame, the driving frame is further provided with a linkage mechanism connected with the sliding block, and when the driving frame reciprocates, the linkage mechanism can drive the sliding block to transversely reciprocate.
Preferably, the driving frame is provided with a long and narrow through groove, the sliding block is mounted in the through groove and can slide along the through groove, the through groove is further provided with a linkage rod, one end of the linkage rod is connected with the sliding block, the other end of the linkage rod penetrates through the driving frame and can slide relative to the driving frame, the linkage rod is provided with a boss, the linkage rod is further sleeved with an elastic restoring piece, one end of the elastic restoring piece is abutted to the boss, and the other end of the elastic restoring piece is abutted to the driving frame.
Preferably, the heading die set further comprises a third die position arranged at the front end station of the first die position, and the third die position is used for installing a third punch die for reducing and drawing the blank; the punch die set comprises a third punch which is arranged opposite to the third die position, and the blank can be subjected to reduction drawing operation through the matching of the third punch and the third die.
Preferably, a feeding groove arranged in parallel with the third die position transversely and used for receiving wires required by machining of screws is further arranged at the front end station of the third die position on the frame, a wire hole for the wires to pass through is formed in the feeding groove, and a shearing knife is arranged in the feeding groove and used for shearing the extending part of the wires to form a blank.
Preferably, the cutting blade includes a plate movable in the feeding chute, and a blade hole for the wire to pass through is formed in the plate, so that when the plate moves, the protruding portion of the wire is cut through the blade hole in the plate.
Preferably, the frame is further provided with a first ejector rod opposite to the feeding groove, and the first ejector rod is used for limiting the extending length of the wire rod.
Preferably, the transfer mechanism comprises a support which is arranged above the heading module and is of a frame structure, a sliding plate capable of sliding transversely is arranged on the support, a second driving mechanism capable of driving the sliding plate to slide is arranged on the rack, a plurality of freely openable and closable jaw pieces are transversely arranged on the sliding plate in parallel, and the opening and closing of the jaw pieces are controlled by a third driving mechanism arranged on the rack.
Preferably, the second die comprises a movable die and a stationary die, the movable die and the stationary die are respectively provided with a die cavity which can be aligned together and is used for clamping the blank processed by the first die and the first punch, the side wall of the second die position is provided with a first through hole, the movable die is connected with a fourth driving mechanism arranged on the frame through a connecting rod which passes through the first through hole, and the fourth driving mechanism controls the movable die to approach or leave the stationary die through the connecting rod.
Preferably, a plurality of second through holes are formed in the side wall of the second die position around the first through hole, a second ejector rod penetrates through each second through hole, a movable block is sleeved on the connecting rod, and the movable block can press the second ejector rod into the second die position under the action of the fourth driving mechanism.
Preferably, the movable block is further sleeved with a return spring.
Preferably, a first elastic thimble communicated with the die cavity on the movable die is arranged on the side wall of the movable die, which is far away from the static die, and when the movable die is separated from the static die, the first elastic thimble is extruded by the side wall of the second die position to move towards the die position of the movable die.
Preferably, a second elastic ejector pin communicated with a die position on the static die is arranged on the side wall of the static die, which is far away from the movable die, and a pressure rod fixed on the static die is further arranged at the top of the second elastic ejector pin and used for pressing the second elastic ejector pin towards the die position; and a fifth driving mechanism connected with the pressure lever is arranged on the rack.
Preferably, the thread rolling mechanism includes a first thread rolling plate and a second thread rolling plate which are arranged oppositely, a thread rolling channel for rolling the blank is formed between the first thread rolling plate and the second thread rolling plate, a feeding channel communicated with the thread rolling channel is further arranged at the upper end of the thread rolling channel, the upper end of the feeding channel is communicated with the blanking channel, a limiting member is arranged at a communication port of the feeding channel and the thread rolling channel, and the limiting member is used for enabling the blank to enter the thread rolling channel singly and orderly.
Preferably, the thread rolling channel is communicated with the feeding channel through a bending channel, a push plate is further arranged in the bending channel, and the blank falling into the bending channel can be pushed into the thread rolling channel by the push plate.
Drawings
FIG. 1 is a schematic view of an assembly structure of a screw cold heading forming device according to an embodiment of the invention.
Fig. 2 is a schematic view of the installation positions of the heading die set and the punch die set according to the embodiment of the invention.
Fig. 3 is a schematic perspective view of the heading module shown in fig. 2.
Fig. 4 is a schematic perspective view of the baffle plate in fig. 3.
Fig. 5 is a schematic perspective view of a first driving mechanism according to an embodiment of the present invention.
Fig. 6 is a schematic perspective view of a transfer mechanism according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of the back structure of fig. 7.
Fig. 8 is a schematic view of a matching structure of the transfer mechanism and the heading module according to an embodiment of the invention.
Fig. 9 is a schematic perspective view of a second die according to an embodiment of the present invention.
Fig. 10 is a schematic view of a stationary die structure of the second die of fig. 9.
Fig. 11 is a schematic view of a moving die structure of the second die in fig. 9.
Fig. 12 is a schematic perspective view of a thread rolling mechanism according to an embodiment of the present invention.
Fig. 13a to 13e are schematic views of the forming structure of the blank in each processing step in the embodiment of the invention.
Detailed Description
In order to explain technical contents, structural features, implementation principles, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in combination with the embodiments.
As shown in fig. 1 to 3 and fig. 13a to 13d, the invention discloses a screw cold heading forming device, which comprises a frame 1, wherein a heading module 2, a punch module 3, a transfer mechanism 4 and a thread rolling mechanism 5 are mounted on the frame 1. The heading die set 2 is used for clamping the blank 100 to be processed, and the punch die set 3 can reciprocate relative to the heading die set 2 to feed the blank 100 into the heading die set 2 and strike the blank 100 therein so as to obtain a desired head shape (such as flat head, round head, flat head, square head, hexagonal head and the like). The heading die set 2 includes a first die station 20 and a second die station 21, the first die station 20 is used for mounting a first die (not shown), the second die station 21 is used for mounting a second die 27 (as shown in fig. 9), and the specific types of the first die and the second die 27 can be determined according to the required head types. The punch die set 3 includes a first punch 30 and a second punch 31 respectively engaged with the first die 20 and the second die 21, and a pier is formed at one end of the blank 100 by engagement of the first punch 30 and the first die, and another pier is formed at the other end of the blank 100 by engagement of the second punch 31 and the second die 27. The transfer mechanism 4 is used to transfer the material 100 between the stations according to the processing procedure. The thread rolling mechanism 5 is connected with the output end of the second die position 21 through a blanking channel 50, and is used for performing thread rolling operation on the blank 100 to form threads 103 on the blank. In addition, in the embodiment, the punch module 3, the transfer mechanism 4 and the thread rolling mechanism 5 are powered and supported by a motor and a gear transmission mechanism.
The working principle of the screw cold heading forming device is as follows: loading a first die and a second die 27 with a desired head-type structure into a first die position 20 and a second die position 21, respectively, then starting the apparatus, placing the blank 100 between the first die and a first punch 30 by a transfer mechanism 4, then moving the first punch 30 toward the first die, ejecting the blank 100 into the first die, and upsetting one end of the blank 100 into an abutment with a desired structure in the first die under the ejecting force of the first punch 30, then ejecting the blank 100 out of the first die and transferring the blank 100 between the second die 27 and a second punch 31 by the transfer mechanism 4, at the same time, the transfer mechanism 4 loads the first die, then ejecting the blank 100 into the second die 27 by the second punch 31, and upsetting the blank 100 entering the second die 27, forming an abutment with a desired structure at the other end of the blank 100, and then dropping the blank 100 with the abutments formed at both ends into a rolling mechanism 5 through a blanking channel 50, the thread rolling mechanism 5 forms a screw with a thread of a required structure after rolling the blank 100; according to the processing process, the pier striking and the final thread rolling work at the two ends of the blank 100 can be finished through a complete processing flow on one device, the device does not need to be replaced in the middle, the production cost is low, and the production efficiency is high. It should be noted that the backs of the first die and the second die 27 are respectively provided with an ejection mechanism in transmission connection with a gear transmission mechanism on the frame 1, and the blank 100 is ejected from the first die and the second die 27 by the ejection mechanism, and details of the specific arrangement of the ejection mechanism are not described herein in detail in the prior art.
In order to improve the working efficiency, as shown in fig. 2 to 4, the first die position 20 is located at the front end station of the second die position 21, the side of the second die position 21 opposite to the second punch 31 is provided with a baffle 33, that is, the baffle 33 and the second punch 31 are respectively located at the opposite sides of the second die position 21, the baffle 33 is provided with a die 330 adapted to the head shape of the screw to be processed, and after the second punch 31 pushes the blank 100 into the second die 27, the rear end of the blank 100 is formed into a pier in the die 330. In this embodiment, the blank 100 forms the first abutment 101 at one end of the blank 100 at the first die position 20 (as shown in fig. 13c), the first abutment 101 is located at a side close to the first punch 30, then when the blank 100 with the first abutment 101 is transferred to the second die position 21 by the transfer mechanism 4, the blank 100 does not need to be turned, at this time, one end of the blank 100 different from the first abutment 101 is close to the second die 27, the second punch 31 pushes the blank 100 into the second die 27, and when the blank 100 abuts against the die 330 on the baffle 33, the other end of the blank 100 forms the second abutment 102 in the die 330 (as shown in fig. 13d) along with the striking of the second punch 31. Therefore, by the above arrangement, the transfer mechanism 4 does not need to be turned when transferring the blank 100, thereby simplifying the transfer mechanism 4 and improving the production efficiency.
To facilitate the installation of the screw, a screw with two abutments, as shown in fig. 13d, is provided with a flower 103, such as a straight type, a cross type, a quincunx type 103, a hexagon socket type, a triangle type, etc., on one of the abutments, therefore, preferably, as shown in fig. 4, a cutting die 331 is installed on the baffle 33 in the above embodiment, the cutting die 331 is used for machining a flower 103 on the abutment of the blank 100, and the baffle 33 can reciprocate relative to the second die position 21 to alternately align the cutting die 331 and the die 330 with the second die 27. After the blank 100 is fed into the second die 27, the rear end of the blank 100 is first upset in the form 330 to form a second abutment 102, then the die 331 is aligned with the second die 27 by the movement of the shutter 33, and then the second abutment 102 abuts against the die 331 again by the striking of the second punch 31, thereby forming a pattern 103 corresponding to the die 331 on the second abutment 102.
Regarding the driving arrangement for the reciprocating motion of the baffle 33, preferably, the frame 1 is provided with a first driving mechanism for driving the baffle 33 to reciprocate in the vertical direction, as shown in fig. 1 and 5, the first driving mechanism includes an upper connecting rod 60, a lower connecting rod 61 and a driving frame 62, the driving frame 62 can reciprocate transversely under the driving of the gear transmission mechanism on the frame 1, the upper end of the upper connecting rod 60 is connected with the baffle 33, one end of the lower connecting rod 61 is pivoted with the lower end of the upper connecting rod 60, the other end of the lower connecting rod 61 is connected with a sliding block 63 arranged in the driving frame 62, the driving frame 62 is further provided with a linkage mechanism connected with the sliding block 63, and when the driving frame 62 reciprocates, the sliding block 63 can be driven by the linkage mechanism to reciprocate transversely. Preferably, the driving frame 62 is provided with a long and narrow through slot 64, the sliding block 63 is installed in the through slot 64 and can slide along the through slot 64, the through slot 64 is further provided with a linkage rod 65, one end of the linkage rod 65 is connected with the sliding block 63, the other end of the linkage rod 65 passes through the driving frame 62 and can slide relative to the driving frame 62, the linkage rod 65 is provided with a boss 66, the linkage rod 65 is further sleeved with an elastic restoring member 67, one end of the elastic restoring member 67 is abutted to the boss 66, and the other end of the elastic restoring member 67 is abutted to the driving frame 62. The working principle of the first driving mechanism is as follows: after a driving motor on the rack 1 is started, under the driving of a gear transmission mechanism, the driving frame 62 reciprocates transversely, the transverse motion of the driving frame 62 can cause the deformation of the elastic restoring piece 67 in the driving frame 62 to change, so that the elastic restoring piece 67 generates pushing force or pulling force on the linkage rod 65 through the boss 66 on the linkage rod 65, then the linkage rod 65 drives the sliding block 63 to slide transversely on the driving frame 62, the reciprocating sliding of the sliding block 63 further causes the two ends of the lower connecting rod 61 to tilt alternately, the lower connecting rod 61 drives the upper connecting rod 60 to move up and down, and finally the baffle 33 is driven to move up and down, so that the mold 330 and the cutting die 331 on the baffle 33 are aligned with the second die 27 alternately.
Further, as shown in fig. 2 and 3, the heading die set 2 further includes a third die station 22 disposed at a front end station of the first die station 20, and the third die station 22 is used for installing a third die (not shown) for reducing and drawing the blank 100. The punch die set 3 includes a third punch 32 disposed opposite to the third die position 22, and the blank 100 can be subjected to a reduction drawing operation by cooperation of the third punch 32 and the third die. To start the operation, the cut blank 100 is first placed between the third die and the third punch 32 by the transfer mechanism 4, the blank 100 is pushed into the third die by the third punch 32, the blank 100 is reduced in the third die by stretching, and the end 105 is formed near the end where the third punch 32 is located.
Further, referring to fig. 1, fig. 2 and fig. 3 again, a feeding chute 23 arranged in parallel transversely to the third die position 22 and used for receiving the wire rod required for processing the screw is further provided on the frame 1 at the front end station of the third die position 22, a wire hole 230 for passing the wire rod is provided in the feeding chute 23, and a material shearing knife is provided in the feeding chute 23 and used for shearing the portion of the wire rod extending out to form the blank 100 (see fig. 13 a). In this embodiment, the wire hole 230 is disposed on the rear wall of the feeding chute 23, the frame 1 is provided with a conveying channel 12 behind the feeding chute 23 for conveying a wire to the feeding chute 23, the wire enters the feeding chute 23 through the conveying channel 12 and then extends out of the wire hole 230 of the feeding chute 23, and after extending out by a certain length, the extending part is cut off by a material cutting knife to form the blank 100 for processing a screw. Preferably, the cutting blade includes a plate member 24 movable in the feed chute 23, the plate member 24 having a blade hole 25 through which the wire passes, the blade hole 25 coinciding with the wire hole 230 during threading, and the blade hole 25 of the plate member 24 being configured to cut the protruding portion of the wire as the plate member 24 moves. When the wire is extended out of the blade hole 25 by a certain length, the plate 24 is moved up, so that the extended wire is cut off through the blade hole 25 of the plate 24 and attached to the plate 24. Preferably, the frame 1 is further provided with a first push rod 26 opposite to the feeding chute 23, and the first push rod 26 is used for limiting the extending length of the wire. When the wire is extended forward from the feed chute 23 to the first push rod 26, the wire abuts against the first push rod 26, so that the further extension of the wire is limited, and the distance between the free end of the first push rod 26 and the feed chute 23 can be adjusted for screws with different lengths.
With regard to the mounting structure of the heading die set 2, the punch die set 3 and other related mechanisms in the above embodiment, specifically, as shown in fig. 1 and 2, a base 10 is mounted at one end of the frame 1, four grooves are sequentially arranged on the base 10 side by side for a feeding chute 23, a third die position 22, a first die position 20 and a second die position 21, respectively, the punch die set 3 is mounted on the opposite side of the base 10, a third punch 32 is opposite to the third die position 22, a first punch 30 is opposite to the first die position 20, a second punch 31 is opposite to the second die position 21, and a first ram 26 is opposite to the feeding chute 23. When the pier and the flower 103 are to be formed on one end of the blank 100 at the same time, the blank 100 is hit twice in the second die position 21, so that the working timing of the second punch 31, the third punch 32 and the first punch 30 are different, therefore, the third punch 32 and the first punch 30 are fixed together and reciprocate back and forth relative to the base 10, and the second punch 31 reciprocates independently, for this purpose, the gear transmission mechanism comprises a first transmission shaft 11 arranged on the frame 1, an eccentric wheel 110 and a first cam 111 are arranged on the first transmission shaft 11, and the eccentric wheel 110 is connected with the third punch 32 and the first punch 30 to drive the third punch 32 and the first punch 30 to reciprocate. The second punch 31 is mounted on a fixing block 34, and a restoring member (such as a spring) may be mounted between the fixing block 34 and the base 10, and the second punch 31 is driven to reciprocate relative to the second die 21 by the cooperation of the first cam 111 and the restoring member.
In another preferred embodiment of the screw cold heading forming device of the present invention, as shown in fig. 6 to 8, the transfer mechanism 4 comprises a frame-shaped support 40 disposed above the heading module 2, a sliding plate 41 capable of sliding transversely is disposed on the support 40, a second driving mechanism capable of driving the sliding plate 41 to slide is disposed on the frame 1, a plurality of freely openable and closable jaw members 43 are disposed on the sliding plate 41 in parallel, and the opening and closing of the jaw members 43 are controlled by a third driving mechanism mounted on the frame 1. Since the machine frame is provided with three stations of feeding, reducing, primary upsetting and secondary upsetting, in this embodiment, three jaw members 43 are arranged side by side on the sliding plate 41, which are named as a first jaw 430, a second jaw 431 and a third jaw 432 for convenience of description, in operation, the sliding plate 41 is driven by the second driving mechanism to slide along the support 40, so that the first jaw 430 is located at the feeding chute 23, the second jaw 431 is located at the third die position 22, the third jaw 432 is located at the first die position 20, then the first jaw 430, the second jaw 431 and the third jaw 432 are simultaneously opened and clamp the blank 100, and then the first jaw 430 transfers the blank 100 cut at the feeding chute 23 to the third die position 22, the second jaw 431 transfers the blank 100 stretched at the third die position 22 to the first die position 20 in cooperation with the sliding of the sliding plate 41, the third clamping jaw 432 transfers the blank 100 after the primary upsetting to the second die position 21, so that the transfer of the blank 100 is completed by continuous circulation. Regarding the second driving mechanism, as shown in fig. 1 and fig. 6, it includes a second transmission shaft 420, a second cam 421 and a link mechanism, the second transmission shaft 420 is in transmission connection with the first transmission shaft 11, the second transmission shaft 420 is installed on a pair of installation plates 423 on one side of the frame 1, the second cam 421 is installed on the second transmission shaft 420, one end of the link mechanism 422 is connected with the sliding plate 41 on the bracket 40, the other end of the link mechanism 422 is installed at the second cam 421, and the sliding plate 41 is driven to reciprocate by the intermittent control of the link mechanism 422 by the second cam 421. The link mechanism 422 specifically includes a first link 424 and a second link 425, the first link 424 is connected to the sliding plate 41, the second link 425 is installed at the second cam 421 between the two installation plates 423, the lower end of the second link 425 is pivoted to one of the installation plates 423, the upper end of the second link 425 is pivoted to the first link 424, the upper end of the second link 425 is slidably installed on a pair of sliding rods 426, a return spring is sleeved on each sliding rod 426, and the second transmission shaft 420 drives the sliding plate 41 to reciprocate along the bracket 40 through the link structure by matching the second cam 421 and the return spring.
As shown in fig. 6, each of the jaw members 43 in the above embodiments includes a movable jaw 433 and a fixed jaw 434, and the third driving mechanism can control the opening and closing of the jaws by driving the movable jaw 433, specifically, as shown in fig. 7, the third driving mechanism includes a rotating block 440 disposed on the back of the sliding plate 41 and connected to each movable jaw 433, and a top plate 441 opposite to each rotating block 440, the middle of the top plate 441 is disposed on a rotating shaft 442, the back of the bracket 40 is provided with a supporting arm 443, a driving shaft 444 is mounted on the supporting arm 443, the driving shaft 444 is provided with third cams 445 corresponding to the three top plates 441, and when the driving shaft 444 rotates, the third cams 445 intermittently abut against the rear end of the top plate 441, so that the front end of the top plate 441 tilts upward, thereby rotating the rotating blocks 440, and finally achieving the purpose of rotating the movable jaw 433.
In another preferred embodiment of the screw cold heading forming apparatus of the present invention, as shown in fig. 9 to 11, the second die 27 includes a movable die 270 and a stationary die 271, and the movable die 270 and the stationary die 271 are respectively provided with a die cavity 272 which can be aligned together for clamping the blank 100 processed by the first die and the first punch 30. In order to facilitate the control of the opening and closing of the second die 27, please refer to fig. 1 and 8, a first through hole 76 is formed on a sidewall of the second die position 21, the movable die 270 is connected to a fourth driving mechanism disposed on the frame 1 through a connecting rod 70 penetrating through the first through hole 76, in the middle of this embodiment, the connecting rod 70 is screwed with the movable die 270, and the fourth driving mechanism controls the movable die 270 to approach or depart from the stationary die 271 through the connecting rod 70. Preferably, the fourth driving mechanism includes a fourth cam 71 provided on the second transmission shaft 420, and the connecting rod 70 is pushed into the second mold position 21 by the fourth cam 71. Preferably, a plurality of second through holes 72 are formed in the sidewall of the second mold 21 around the first through hole 76, a second rod 73 penetrates through each second through hole 72, a movable block 74 is sleeved on the connecting rod 70, and the movable block 74 can press the second rod 73 toward the second mold 21 under the action of the fourth driving mechanism. To facilitate the return of the movable block 74, a return spring is further sleeved on the movable block 74. After the blank 100 enters the second die 27, the fourth cam 71 pushes and presses the connecting rod 70 and the movable block 74 towards the second die position 21, so that the movable die 270 in the second die 27 moves towards the stationary die 271 through the connecting rod 70 and the second ejector rod 73, the movable die 270 and the stationary die 271 are abutted together, after the upsetting operation is finished, the movable block 74 is reset through the elastic restoring force of the reset spring sleeved on the movable block 74, the reset of the movable block 74 can drive the connecting rod 70 to reset, and the movable die 270 is pulled back through the connecting rod 70 and separated from the stationary die 271.
With regard to the second die 27, with reference to fig. 9 to 11 again, a side wall of the movable die 270 away from the stationary die 271 is provided with a first elastic ejector pin 273 communicated with the die cavity 272 of the movable die 270, and when the movable die 270 is separated from the stationary die 271, the first elastic ejector pin 273 is pushed by the side wall of the second die position 21 to move towards the die cavity 272 of the movable die 270; a second elastic thimble 274 communicated with the die cavity 272 on the static die 271 is arranged on the side wall of one side of the static die 271, which is far away from the movable die 270, the top of the second elastic thimble 274 is also provided with a pressure rod 275 fixed on the static die 271, and the pressure rod 275 is used for pressing the second elastic thimble 274 towards the die cavity 272; the frame 1 is provided with a fifth driving mechanism (not shown) connected to the pressing rod 275. In this embodiment, when the second die 27 opens the die, the blank 100 is ejected out of the die cavity 272 by the first elastic ejector pin 273 and the second elastic ejector pin 274 on the movable die 270 and the stationary die 271, so that the blank 100 is prevented from sticking in the die cavity 272.
Regarding the thread rolling mechanism 5, preferably, as shown in fig. 12, the thread rolling mechanism 5 includes a first thread rolling plate 51 and a second thread rolling plate 52 which are oppositely disposed, a thread rolling channel 53 for thread rolling of the blank 100 is formed between the first thread rolling plate 51 and the second thread rolling plate 52, a feeding channel 54 which is communicated with the thread rolling channel 53 is further disposed at an upper end of the thread rolling channel 53, an upper end of the feeding channel 54 is communicated with the blanking channel 50, a limiting member 55 is disposed at a communication port of the feeding channel 54 and the thread rolling channel 53, and the limiting member 55 is used for enabling the blank 100 to enter the thread rolling channel 53 individually and orderly. In this embodiment, the limiting member 55 disposed at the end of the feeding channel 54 can prevent a plurality of blanks 100 that have been upset from entering the thread rolling channel 53 at the same time, so as to ensure thread rolling quality. In a further improvement, the thread rolling channel 53 is communicated with the feeding channel 54 through a bending channel 56, a push plate 57 is further arranged in the bending channel 56, and the blank 100 falling into the bending channel 56 can be pushed into the thread rolling channel 53 by the push plate 57. By the provision of the bending channels 56 it is further ensured that the blanks 100 enter the thread rolling channels 53 individually in a sequential order. Specifically, the push plate 57 is in transmission connection with a gear transmission mechanism on the frame 1, and the gear transmission mechanism drives the push plate 57 to orderly reciprocate. In addition, the limiting member 55 has a resetting function, the push plate 57 may further include a third push rod 58, when the push plate 57 moves towards the feeding channel 54, the third push rod 58 abuts against the limiting member 55, so that the limiting member 55 opens the feeding channel 54, the blank 100 enters the bending channel 56, then the blank 100 is pushed into the thread rolling channel 53 along with the further movement of the third push rod 58, and when the push plate 57 returns, the limiting member 55 automatically resets.
In summary, as shown in fig. 1 to 13e, the specific working process of the screw cold heading forming device disclosed in the above embodiment is as follows: first, a wire rod is inserted into the conveying passage 12 on the frame 1, the wire rod is fed into the feed chute 23 at the front end by the conveying passage 12 and is passed out from the front end of the feed chute 23 until abutting against the first ejector pin 26, then the plate member 24 in the feed chute 23 is moved up, the portion of the wire rod protruding out is cut off through the cutter hole 25 in the plate member 24 to form a blank 100 for processing a screw (see fig. 13a), then the transfer mechanism 4 is activated to transfer the blank 100 between the third die position 22 and the third punch 32, then the third punch 32 is moved toward the third die position 22 to eject the blank 100 into the third die, the blank 100 is drawn down by the cooperation of the third punch 32 and the third die, and a tip 105 is formed at an end near the third punch 32 (see fig. 13b), then the blank 100 is ejected by the ejection mechanism at the rear end in the third die, the blank 100 is transferred between the first die position 20 and the first punch 30 by the transfer mechanism 4 after being ejected, the first punch 30 is then moved towards the first die position 20 to eject the blank 100 into the first die, which, by engagement of the first punch 30 with the first die, a first abutment 101 is formed on the blank 100 near one end of the first punch 30 (figure 13c), the blank 100 is then ejected from the first die, transferred by the transfer mechanism 4 between the second die 27 and the second punch 31, subsequently, the second punch 31 is moved toward the second die 27 to push the blank 100 into the second die 27, then by the cooperation of the second punch 31, the second die 27 and the die 330 on the shutter 33 at the rear end of the second die 27, a second abutment 102 is formed at the other end of the blank 100 (see fig. 13d), and then the stop plate 33 is moved down, so that the cutting die 331 on the baffle 33 is aligned with the second pier head 102 at the rear end of the second punching die 27, then, with the second punch 31 hitting again, a flower pattern 103 is formed on the second pier 102 (see fig. 13 d); then, the blank 100 after being upset and formed falls into the blanking channel 50, enters the feeding channel 54 through the blanking channel 50, then the limiting piece 55 at the end of the feeding channel 54 is opened, the blank 100 is pushed into the thread rolling channel 53 by the push plate 57, thread rolling on the blank 100 is completed, and a thread 104 is formed on the first abutment head 101 (as shown in fig. 13e), so that the screw machining is completed.
The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the present invention, which is therefore intended to cover all equivalent changes and modifications within the scope of the present invention.
Claims (17)
1. The screw cold heading forming device is characterized by comprising a rack, wherein a heading module, a punch module, a transfer mechanism and a thread rolling mechanism are arranged on the rack;
the punching head module is used for clamping a blank to be processed, and the punch head module can reciprocate relative to the punching head module so as to send the blank into the punching head module and punch the blank therein, so that a required head shape is obtained;
the heading die set comprises a first die position and a second die position, wherein the first die position is used for mounting a first punching die, and the second die position is used for mounting a second punching die;
the punch die set comprises a first punch and a second punch which are matched with the first die position and the second die position respectively;
a pier head can be formed at one end of the blank through the matching of the first punch and the first die, and another pier head can be formed at the other end of the blank through the matching of the second punch and the second die;
the transfer mechanism is used for transferring the blank among the stations according to the processing procedure;
and the thread rolling mechanism is butted with the output end of the second die position through a blanking channel and is used for performing thread rolling operation on the blank.
2. The screw cold heading forming device according to claim 1, wherein the first die position is located at a front end station of the second die position, a baffle plate is arranged on a side of the second die position opposite to the second punch, a die matched with a head shape of the screw to be processed is arranged on the baffle plate, and after the second punch feeds the blank into the second die, a rear end of the blank is formed into a butted head in the die.
3. The screw cold heading forming device according to claim 2, wherein a cutting die is further disposed on the baffle plate, the cutting die is used for machining a pattern on the pier head of the blank, and the baffle plate can reciprocate relative to the second die position to alternately align the cutting die and the forming die with the second punching die.
4. The screw cold heading forming device according to claim 3, wherein the frame is provided with a first driving mechanism for driving the baffle to reciprocate in a vertical direction, the first driving mechanism comprises an upper connecting rod, a lower connecting rod and a driving frame, the driving frame can reciprocate transversely under the driving of a main transmission mechanism on the frame, the upper end of the upper connecting rod is connected with the baffle, one end of the lower connecting rod is pivoted with the lower end of the upper connecting rod, the other end of the lower connecting rod is connected with a sliding block arranged in the driving frame, the driving frame is further provided with a linkage mechanism connected with the sliding block, and when the driving frame reciprocates, the linkage mechanism can drive the sliding block to reciprocate transversely.
5. The cold-heading forming device for the screw according to claim 4, wherein the driving frame is formed with a long and narrow through slot, the sliding block is mounted in the through slot and can slide along the through slot, the through slot is further provided with a linkage rod, one end of the linkage rod is connected with the sliding block, the other end of the linkage rod passes through the driving frame and can slide relative to the driving frame, the linkage rod is provided with a boss, the linkage rod is further sleeved with an elastic restoring member, one end of the elastic restoring member abuts against the boss, and the other end of the elastic restoring member abuts against the driving frame.
6. The screw cold heading forming device according to claim 1, wherein the heading die set further comprises a third die position arranged at the front end station of the first die position, and the third die position is used for installing a third punch die for reducing and stretching the blank; the punch die set comprises a third punch which is arranged opposite to the third die position, and the blank can be subjected to reduction drawing operation through the matching of the third punch and the third die.
7. The screw cold heading forming device according to claim 6, wherein a feed chute arranged transversely and side by side with the third die position and used for receiving a wire rod required for processing a screw is further arranged on the frame at the front end station of the third die position, a wire hole for the wire rod to pass through is formed in the feed chute, and a shearing knife is arranged in the feed chute and used for shearing the part of the wire rod extending out to form a blank.
8. The screw cold heading forming device according to claim 7, wherein the shearing blade includes a plate movable in the feed chute, and a blade hole is formed in the plate for the wire to pass through, and when the plate is moved, the protruding portion of the wire is sheared off through the blade hole in the plate.
9. The screw cold heading forming device according to claim 7, wherein a first ejector pin is further provided on the frame opposite to the feed chute, the first ejector pin being for limiting the protruding length of the wire.
10. The screw cold heading forming device according to claim 1, wherein the transfer mechanism includes a frame-shaped support disposed above the heading module, the support is provided with a sliding plate capable of sliding laterally, the frame is provided with a second driving mechanism capable of driving the sliding plate to slide, the sliding plate is provided with a plurality of freely openable and closable jaw members laterally, and the opening and closing of the jaw members are controlled by a third driving mechanism mounted on the frame.
11. The cold-heading forming device for the screw according to claim 1, wherein the second die comprises a movable die and a stationary die, the movable die and the stationary die are respectively provided with a die cavity which can be aligned together for clamping the blank processed by the first die and the first punch, the side wall of the second die position is provided with a first through hole, the movable die is connected with a fourth driving mechanism arranged on the frame through a connecting rod passing through the first through hole, and the fourth driving mechanism controls the movable die to approach or depart from the stationary die through the connecting rod.
12. The screw cold heading forming device according to claim 11, wherein a plurality of second through holes are formed in the side wall of the second die position around the first through hole, a second ejecting rod penetrates through each second through hole, a movable block is sleeved on the connecting rod, and the movable block can push the second ejecting rod towards the second die position under the action of the fourth driving mechanism.
13. The screw cold heading forming device according to claim 12, wherein the movable block is further sleeved with a return spring.
14. The screw cold heading forming device according to claim 11, wherein a first resilient pin communicating with the cavity of the movable die is provided on a side wall of the movable die on a side thereof away from the stationary die, and when the movable die is separated from the stationary die, the first resilient pin is pressed by a side wall of the second die position to move into the die position of the movable die.
15. The screw cold heading forming device according to claim 11, wherein a second elastic thimble communicated with a die position on the stationary die is provided on a side wall of the stationary die on a side away from the movable die, and a pressing rod fixed on the stationary die is further provided on a top of the second elastic thimble, and the pressing rod is used for pressing the second elastic thimble toward the die position; and a fifth driving mechanism connected with the pressure lever is arranged on the rack.
16. The screw cold heading forming device according to claim 1, wherein the thread rolling mechanism includes a first thread rolling plate and a second thread rolling plate which are arranged oppositely, a thread rolling channel for rolling the blank is formed between the first thread rolling plate and the second thread rolling plate, a feeding channel communicated with the thread rolling channel is further arranged at an upper end of the thread rolling channel, the upper end of the feeding channel is communicated with the blanking channel, a limiting member is arranged at a communication port of the feeding channel and the thread rolling channel, and the limiting member is used for enabling the blank to enter the thread rolling channel in order.
17. The screw cold heading forming device according to claim 16, wherein the thread rolling channel is communicated with the feeding channel through a bending channel, and a push plate is further arranged in the bending channel and can push the blank falling into the bending channel into the thread rolling channel.
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| CN201911130655.XA CN110666075A (en) | 2019-11-18 | 2019-11-18 | Screw cold heading forming device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911130655.XA CN110666075A (en) | 2019-11-18 | 2019-11-18 | Screw cold heading forming device |
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| CN112387911A (en) * | 2020-10-26 | 2021-02-23 | 广州法思特精密五金有限公司 | Tooth plate capable of extruding taper of tail of screw |
| CN112387912A (en) * | 2020-10-26 | 2021-02-23 | 广州法思特精密五金有限公司 | Screw rod one-step forming process of screw |
| CN113664131A (en) * | 2021-07-08 | 2021-11-19 | 黎东 | Multifunctional cold header |
| CN113714171A (en) * | 2021-09-09 | 2021-11-30 | 桐乡展裕电子科技有限公司 | Forming process and production device of wear-resistant stainless steel screw |
| CN115283578A (en) * | 2022-09-02 | 2022-11-04 | 浙江友信机械工业有限公司 | Cold heading forming machine |
| EP4108358A1 (en) * | 2021-06-25 | 2022-12-28 | F.LLI MAURI S.p.A. | Apparatus, machine and method for deforming the opposite ends of a piece of wire |
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