CN116422719A - Continuous bar drawing device and drawing method - Google Patents
Continuous bar drawing device and drawing method Download PDFInfo
- Publication number
- CN116422719A CN116422719A CN202310403364.3A CN202310403364A CN116422719A CN 116422719 A CN116422719 A CN 116422719A CN 202310403364 A CN202310403364 A CN 202310403364A CN 116422719 A CN116422719 A CN 116422719A
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- mold core
- bar
- guide rail
- clamping
- die holder
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010621 bar drawing Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims description 11
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- 238000010622 cold drawing Methods 0.000 abstract description 7
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/20—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes from stock of essentially unlimited length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/34—Guiding or supporting the material or mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/12—Die holders; Rotating dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention discloses a continuous bar drawing device, which comprises a frame, wherein a guide rail is arranged on the frame, a drawing mechanism is arranged on the guide rail, the drawing mechanism comprises a drawing trolley which reciprocates on the guide rail, an automatic clamping clamp is arranged on one side of the drawing trolley, a drawing die holder is arranged on one side of the frame close to the automatic clamping clamp, a guide cavity penetrating through the die holder is arranged on the drawing die holder, a first die core is arranged on the drawing die holder corresponding to the inlet end of the guide cavity, a first drawing hole penetrating through the die core is arranged on the first die core and is communicated with the inlet end of the guide cavity, a second die core is arranged on the drawing die holder corresponding to the outlet end of the guide cavity, and a second drawing hole penetrating through the die core is arranged on the second die core and is communicated with the outlet end of the guide cavity; the high-strength material is subjected to one cold drawing by two continuous drawing processes, so that the reduction rate can be increased, the strength is improved, and the risk of stress cracking caused by one large-scale deformation is avoided.
Description
Technical Field
The invention relates to the technical field of cold drawing dies, in particular to a continuous bar drawing device and a drawing method.
Background
The drawing of the metal material is an important processing means for processing the material, and can realize three purposes of material reinforcement, sizing and surface reduction. In the prior art, the metal material is drawn mainly through two processes, namely a head making stage and a drawing stage. For the straight bar, the normal head is manufactured by adopting an off-line manual cold rolling or hot rolling method. Then, the automatic clamping pliers of the chain type drawing machine are adopted to clamp the head of the bar, and the process is as follows: the drawing-empty car returning-redrawing-empty car returning-redrawing method is carried out. By the reciprocating intermittent mode, the drawing production process is realized; however, when the reduction ratio of the bar is more than 20%, the bar is generally required to be subjected to multi-pass cold drawing, and the production mode is time-consuming and labor-consuming; if the primary cold drawing reaches a reduction of more than 20%, the primary large deformation increases the stress cracking risk of the bar.
Disclosure of Invention
The invention aims to solve the technical problems, and provides a continuous bar drawing device and a drawing method, wherein the continuous bar drawing device and the drawing method are used for carrying out multi-pass cold drawing, the high-strength material is subjected to one-time cold drawing through two continuous drawing processes, and the stress cracking risk caused by one-time large-amplitude deformation can be reduced while the strength is improved.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a continuous drawing device of rod, includes the frame, be equipped with the guide rail in the frame, be equipped with drawing mechanism on the guide rail, drawing mechanism includes the car that draws of reciprocating motion on the guide rail, it is equipped with automatic clamping pincers to draw car one side, is close to automatic clamping pincers frame one side and is equipped with the die holder that draws, its draw and be equipped with the direction chamber that runs through the die holder on the die holder, the entry end in direction chamber corresponds draw and be equipped with first mold core on the die holder, be equipped with the first hole that draws that runs through the mold core on the first mold core and be linked together with the entry end in direction chamber, the exit end in direction chamber corresponds draw and be equipped with the second mold core on the die holder, be equipped with the second hole that runs through the mold core on the second mold core and be linked together with the exit end in direction chamber, first hole aperture is greater than the second draws hole aperture.
In order to increase the interval time between the first drawing and the second drawing and realize the increase of the distance between the first mold core and the second mold core, a further preferable technical scheme is that the second mold core and the corresponding second drawing mold base are separated from the first mold core and the corresponding drawing mold base, and the second mold core and the corresponding second drawing mold base are slidably arranged on the guide rail.
In order to enable the second drawing die holder corresponding to the second die core to be automatically connected with or separated from the drawing trolley, a further preferable technical scheme is that a hinged support is arranged on one side, close to the drawing trolley, of the second drawing die holder corresponding to the second die core, an electromagnetic locking mechanism is arranged on one side, corresponding to the drawing trolley, of the second drawing die holder, the electromagnetic locking mechanism comprises a pair of upper clamping plates and a lower clamping plate, the hinged support can be inserted between the upper clamping plates and the lower clamping plates, a through hole corresponding to a hinged support hinged hole is formed in the upper clamping plates, a chuck is arranged in the through hole, the chuck is a stepped cylinder, a spring is sleeved on the cylinder between one end, far away from the upper clamping body, of the circular chuck and one side, close to the upper clamping plates, of the circular chuck, and an electromagnet is arranged on the lower side face of the lower clamping plate to be matched with the chuck.
In order to control the movement distance of the second drawing die holder corresponding to the second die core, a proper distance is arranged between the first die core and the second die core, further preferable technical scheme is that a pair of positioning telescopic blocks are arranged on the guide rail, the positioning telescopic blocks vertically reciprocate in the guide holes of the guide rail under the driving of a first air cylinder, a first position sensor is arranged on a frame of a drawing mechanism on one side corresponding to the positioning telescopic blocks, the first position sensor is electrically connected with a controller, the controller is electrically connected with an electromagnetic valve on the first air cylinder through a wire, the controller is electrically connected with a relay on the electromagnet through a wire, and the controller adopts a CPU controller.
In order to position the second drawing die holder corresponding to the second die core, a further preferable technical scheme is that clamping devices are respectively arranged on two sides of the drawing mechanism frame corresponding to the positioning telescopic blocks, each clamping device comprises a double-head shifting fork, the middle of the double-head shifting fork is hinged to the frame, the lower end of the double-head shifting fork is hinged to the end portion of a piston rod of a second cylinder, and the base of the second cylinder is hinged to the frame.
A continuous drawing method of a bar, comprising the steps of: s1: setting the coiled bar on a turntable, manually rolling one end of the bar to form a first drawing hole, a guide cavity and a second drawing hole sequentially from one side of a first mold core, and clamping the end of the bar by an automatic clamping clamp of a drawing vehicle;
s2: the drawing trolley continuously draws and shapes the bar twice through the first mold core and the second mold core from the initial position to the end position along the guide rail, the automatic clamping pliers are loosened after the drawing trolley reaches the end position, then the bar is returned to the initial position along the guide rail and then automatically clamped, and then the bar is continuously drawn and shaped twice through the first mold core and the second mold core from the initial position to the end position;
s3: and S2, repeating the step until a roll of bar on the meta-disc machine is drawn and molded.
In order to increase the interval time between the first drawing and the second drawing and realize the increase of the distance between the first mold core and the second mold core, the surface strength is optimized by drawing again after cooling by one drawing, and the further preferable technical scheme is that,
in step S1: setting the coiled bar on a turntable, manually rolling one end of the bar to form a first drawing hole, a guide cavity and a second drawing hole sequentially from one side of a first mold core, clamping the end by an automatic clamping clamp of a drawing vehicle, and fixedly connecting the drawing vehicle with a second drawing mold seat corresponding to the second mold core by an electromagnetic locking mechanism;
in step S2: starting a drawing trolley through a controller, driving a second drawing die holder corresponding to a second die core to draw a bar material to the tail end position along a guide rail by the drawing trolley, carrying out primary drawing on the bar material through a first die core, when the drawing trolley runs to the position of a first position sensor, feeding back a position signal to the controller by the first position sensor, controlling an electromagnetic locking mechanism by a relay to disconnect the drawing trolley from the second drawing die holder by the controller, simultaneously controlling a first air cylinder to act through an electromagnetic valve, enabling a positioning telescopic block to extend out from the lower part of a guide hole on the guide rail to the upper end surface of the guide rail to block the second drawing die holder under the driving of the first air cylinder, controlling the second air cylinder to act through the electromagnetic valve, clamping the second drawing die holder by two sides of the second drawing die holder under the driving of a double-head shifting fork, then continuing to draw the bar material to the tail end position, carrying out secondary drawing on the bar material through the second die core, cooling the bar material after being drawn through the first die core, and carrying out secondary drawing molding by the second die core; after the drawing trolley reaches the tail end position, the automatic clamping pliers are loosened, then the rod is returned to the position of the first position sensor along the guide rail, then the rod is automatically clamped, and is drawn to the tail end position, and the rod is continuously drawn and molded twice through the first mold core and the second mold core;
in step S3: and (2) after the drawing trolley in the step (S2) reaches the tail end position, the automatic clamping pliers are loosened, then the rod is returned to the position of the first position sensor along the guide rail, then the rod is automatically clamped, and is drawn to the tail end position, and the rod is continuously drawn and molded twice through the first mold core and the second mold core until a roll of the rod on the disc machine is drawn and molded.
In order to improve the surface strength of the drawn bar, a further preferable technical scheme is that in step S2: and cooling is carried out between the second drawing and the first drawing through air cooling.
Compared with the prior art, the invention has the beneficial effects that: 1. the high-strength material is subjected to one-time cold drawing through two continuous drawing processes, so that the surface reduction rate can be increased, the strength is improved, and the stress cracking risk caused by one-time large-amplitude deformation is avoided; 2. by increasing the interval time between the first drawing and the second drawing, the surface of the bar after the first drawing is cooled to form first strengthening, and then after the second drawing is continuously carried out, the surface reduction rate can be increased, the strength is improved, and the surface quality is improved.
Drawings
FIG. 1 is a front view of a second die core and drawing die holder fixing structure of the present invention;
FIG. 2 is a front view of a second die core and drawing die holder separation structure of the invention;
FIG. 3 is a front view of a structure in which a second die core is separated from a drawing die holder and drawn to a terminal position;
FIG. 4 is an enlarged view of a portion of FIG. 2A in accordance with the present invention;
FIG. 5 is a side view of the clamping device of FIG. 3 according to the present invention;
in the figure: 1. a frame; 2. a guide rail; 3. a drawing mechanism; 31. drawing vehicle; 32. automatic clamping pliers; 4. a bar; 5. a second mold core; 51. a second drawing hole; 52. the second drawing die holder; 6. drawing a die holder; 61. a guide chamber; 7. a first mold core; 71. a first drawing hole; 8. a first position sensor; 9. a guide hole; 91. positioning the telescopic block; 92. a first cylinder; 10. a clamping device; 101. a double-head shifting fork; 102. a second cylinder; 11. an electromagnetic locking mechanism; 111. a chuck; 112. a spring; 113. an upper clamping plate; 114. a lower clamping plate; 115. an electromagnet; 116. and (5) a hinged support.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Examples
As shown in fig. 1, a continuous bar drawing device comprises a frame 1, be equipped with guide rail 2 in the frame, be equipped with on the guide rail 2 and draw mechanism 3, draw mechanism 3 and draw car 31 including reciprocating motion on guide rail 2, draw car 31 one side and be equipped with automatic clamp pincers 32, be close to and draw die holder 6 that is equipped with of automatic clamp pincers 32 one side, be equipped with on the drawing die holder 6 and run through the guide cavity 61 that draws die holder 6, the exit end of guide cavity is the tapered throat that the aperture reduces gradually, the entry end of guide cavity 61 corresponds draw die holder 6 on be equipped with circular recess, circular recess fixed mounting first mold core 7 is equipped with on the first mold core 7 and runs through the first draw hole 71 of mold core and be linked together with guide cavity 61 entry end, be equipped with on the drawing die holder 6 and fix draw die holder 6's second mold core 5, be equipped with on the second mold core 5 and run through the second draw hole 51 and guide cavity 61 exit end link to each other, first draw the aperture 71 is greater than the second aperture and draw the hole and draw the finished product rate and draw the hole and draw 20% under the first draw mechanism, draw the rate of finished product and draw the rate and draw 20% and the face.
As shown in fig. 2, in order to increase the interval time between the first drawing and the second drawing, the distance between the first mold core and the second mold core is adjustable, further, the second mold core 5 and the corresponding second drawing mold base 52 are separated from the first mold core 7 and the corresponding drawing mold base 6, and the second mold core 5 and the corresponding second drawing mold base 52 are slidably disposed on the guide rail 2;
as shown in fig. 2 and fig. 4, in order to enable the second drawing die holder 52 corresponding to the second die core 5 to be automatically connected with or separated from the drawing trolley 31, further, a hinged support 116 is arranged on one side, close to the drawing trolley 31, of the second drawing die holder 52 corresponding to the second die core 5, an electromagnetic locking mechanism 11 is arranged on one side, corresponding to the drawing trolley 31, of the second drawing die holder, the electromagnetic locking mechanism 11 comprises a pair of upper clamping plates 113 and a lower clamping plate 114, the hinged support 116 can be inserted between the upper clamping plates 113 and the lower clamping plates 114, a through hole corresponding to a hinged hole of the hinged support 116 is formed in the upper clamping plates 113, a clamping head 111 is arranged in the through hole, the clamping head 11 is in a stepped cylinder, a spring 112 is sleeved on one side, close to the upper clamping plate 113, of the clamping head 11, the upper end of the spring 112 is fixedly connected with the stepped surface of the clamping head 111, the lower end of the spring 11 is fixedly connected with the outer side surface of the upper clamping plate 113, the clamping head 111 is vertically arranged in the through hole, the upper clamping head 111 moves up and down along the through hole, an electromagnet is arranged on the lower clamping plate 114, and the clamping head 111 is further connected with the hinged support 116 through the hinged hole, and the clamping head is further connected with the lower clamping plate 114 in turn through the hinged support 114, and the clamping head is further connected with the corresponding electromagnet to the clamping head 114 through the corresponding through hole, and the clamping head 114, and the clamping head is further connected with the clamping head 114 through the hinge hole is further provided with a hole to a hole with a fixed through hole through the corresponding hole, and has a stable hole through hole and has a stable hole.
As shown in fig. 3, in order to control the movement distance of the second drawing die holder 52 corresponding to the second die core 5, a suitable distance is provided between the first die core 5 and the second die core 7, further, a pair of positioning telescopic blocks 91 are provided on the guide rail 2, each guide rail 2 is provided with a guide hole 9 vertically penetrating through the guide rail, the positioning telescopic blocks 91 vertically reciprocate up and down in the guide holes 9 of the guide rail 2 under the driving of the first air cylinders 92, a first position sensor 8 is provided on the frame 1 of the drawing mechanism 3 corresponding to one side of the positioning telescopic blocks 91, the first position sensor 8 is electrically connected with a controller, the controller is electrically connected with an electromagnetic valve on the first air cylinders 92 through a wire, the expansion and contraction of the first air cylinders 92 are controlled through the electromagnetic valve, the controller is electrically connected with a relay on the electromagnet 115 through the wire, and the power on or power off of the electromagnet 115 is controlled through the relay.
As shown in fig. 5, in order to position the second drawing die holder 52 corresponding to the second die core 5, further, the two sides of the frame 1 of the drawing plate mechanism 3 corresponding to the positioning telescopic block 91 are respectively provided with a clamping device 10, each side of the clamping device 10 includes a double-head shifting fork 101, the middle part of the double-head shifting fork 101 is hinged on the frame 1, the lower end of the double-head shifting fork 101 is hinged with the end part of a piston rod of the second air cylinder 102, the base of the second air cylinder 102 is hinged on the frame 1, the double-head shifting fork 101 is passed through by the second air cylinder, and then the hinged shaft hinged on the frame rotates, so that each double-head shifting fork 101 is clamped on one side corresponding to the second die core 5 from the side of the frame, thereby realizing clamping of the second die core 5, limiting the second die core 5 by the positioning telescopic block 91 is matched, so that the second die core 5 can stably stay on the guide rail 2 in the drawing process, and the controller is electrically connected with the electromagnetic valve on the second air cylinder 102 by a wire, and the expansion and contraction of the second air cylinder 102 are controlled by the electromagnetic valve.
As shown in fig. 1, a continuous drawing method of a bar material includes the steps of: s1: setting the rolled bar 4 on a turntable, manually roll-forming one end, sequentially passing through a first drawing 71 hole, a guide cavity 61 and a second drawing hole 51 from one side of a first mold core 7, and then automatically clamping the end by a drawing trolley 31 through an automatic clamping clamp 32;
s2: the drawing trolley 31 continuously draws and shapes the bar 4 twice through the first mold core 7 and the second mold core 5 from the initial position to the end position along the guide rail 2, the automatic clamping pliers 32 are loosened after the drawing trolley 31 reaches the end position, then the bar 4 is returned to the initial position along the guide rail 2 and then automatically clamped, and then the bar 4 is continuously drawn and shaped twice through the first mold core 7 and the second mold core 5 from the initial position to the end position;
s3: and S2, repeating the step until a roll of bar 4 on the meta-disc machine is drawn and molded.
In order to increase the interval time between the first drawing and the second drawing, the distance between the first die core 7 and the second die core 5 can be adjusted, the surface strength is optimized by the second drawing after the cooling of the first drawing, and further,
as shown in fig. 3, in step S1: the coiled bar 4 is arranged on an inverted wire stretcher for coiling and uncoiling, one end is manually rolled and formed, one side of a first mold core 7 sequentially passes through a first drawing hole 71, a guide cavity 61 and a second drawing hole 51, then the end is clamped by an automatic clamping clamp 32 of a drawing vehicle 31, and the drawing vehicle 31 is fixedly connected with a second drawing mold seat 52 corresponding to a second mold core 5 by an electromagnetic locking mechanism 111;
in step S2: starting a drawing trolley 31 through a controller, wherein the drawing trolley 31 drives a second drawing die holder 52 corresponding to a second die core 5 to draw a bar 4 to an end position along a guide rail 2, the bar 4 is drawn once through a first die core 7, when the drawing trolley 31 runs to the position of a first position sensor 8, the first position sensor 8 feeds back a position signal to the controller, the controller controls an electromagnetic locking mechanism 10 through a relay to disconnect the second drawing die holder 52 corresponding to the second die core 5 from the drawing trolley 31, simultaneously controls a first air cylinder 92 to act through an electromagnetic valve, a positioning telescopic block 91 extends out from the lower part of a guide hole 9 on the guide rail 2 to the upper end of the guide rail 2 to block the second drawing die holder 52 corresponding to the second die core 5 under the driving of the first air cylinder 92, then controls the second air cylinder 102 to act through the electromagnetic valve, the double-headed head 101 clamps the second die core 5 by two sides of the second drawing die holder 52 under the driving of the second air cylinder 102, then the drawing trolley 31 continues to draw the bar 4 to the end position, and continuously draw the bar 4 through the second die core 5 for a second time and continuously forming the bar 4 through the second die core 5 and the second die core 4; after the drawing trolley 31 reaches the end position, the automatic clamping pliers 32 are loosened, then the rod 4 is returned to the position of the first position sensor 8 along the guide rail 2, then the rod 4 is automatically clamped, and is drawn to the end position, and the rod 4 is continuously drawn and molded twice through the first mold core 7 and the second mold core 5;
in step S3: after the drawing trolley 31 in the step S2 is repeated to reach the end position, the automatic clamping pliers are loosened, then the bar 4 is returned to the position of the first position sensor 8 along the guide rail 2, then the bar 4 is automatically clamped, and is drawn to the end position, the bar 4 is continuously drawn and molded twice through the first mold core 7 and the second mold core 5 until a roll of bar 4 on the disc machine is drawn and molded, the bar 4 is naturally cooled after being drawn through the first mold core 7 through adjusting the distance between the first mold core 7 and the second mold core 5, the surface is reinforced, and then the bar is drawn and molded through the second mold core 5, so that the reduction ratio can be increased, the strength is improved, and meanwhile, the surface quality is improved.
In order to improve the surface strength of the rod 4 after being pulled out, in the step S2: and cooling is carried out between the second drawing and the first drawing by air cooling, and the surface strengthening effect of the rod 4 after the first drawing is controlled by air cooling.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (8)
1. The utility model provides a continuous drawing device of rod, includes the frame, be equipped with the guide rail in the frame, be equipped with drawing mechanism on the guide rail, drawing mechanism includes the car that draws of reciprocating motion on the guide rail, it is equipped with automatic clamp pincers to draw car one side, is close to automatic clamp pincers frame one side and is equipped with the die holder that draws, a serial communication port, be equipped with the direction chamber that runs through the die holder on the die holder that draws, the entry end in direction chamber corresponds draw and be equipped with first mold core on the die holder, be equipped with the first hole that draws that runs through the mold core on the first mold core and be linked together with the entry end in direction chamber, the exit end in direction chamber corresponds draw and be equipped with the second mold core on the die holder, be equipped with the second hole that runs through the mold core on the second mold core and be linked together with the exit end in direction chamber, first draw the hole aperture is greater than the second draws the hole aperture.
2. The continuous bar drawing apparatus of claim 1 wherein the second mold core and corresponding second drawing mold base are separate from the first mold core and corresponding drawing mold base, the second mold core and corresponding second drawing mold base being slidably disposed on the guide rail.
3. The continuous bar drawing device as claimed in claim 2, wherein a hinge seat is arranged on one side, close to the drawing trolley, of the second drawing die seat corresponding to the second die core, an electromagnetic locking mechanism is arranged on one side, corresponding to the drawing trolley, of the second drawing die seat, the electromagnetic locking mechanism comprises a pair of upper clamping plates and a lower clamping plate, the hinge seat can be inserted between the upper clamping plates and the lower clamping plates, a through hole corresponding to a hinge hole of the hinge seat is formed in the upper clamping plates, a clamping head is arranged in the through hole, the clamping head is a stepped cylinder, a spring is sleeved on the cylinder between one end, far away from the upper clamping body, of the circular clamping head and one side, close to the upper clamping plates, of the circular clamping head, and an electromagnet is arranged on the lower side face of the lower clamping plate and matched with the clamping head.
4. A continuous bar drawing device as claimed in claim 3, wherein the guide rail is provided with a pair of positioning telescopic blocks, the positioning telescopic blocks vertically reciprocate up and down in the guide holes of the guide rail under the drive of a first air cylinder, a first position sensor is arranged on the frame of the drawing mechanism on one side corresponding to the positioning telescopic blocks, the first position sensor is electrically connected with a controller, the controller is electrically connected with an electromagnetic valve on the first air cylinder through a wire, and the controller is electrically connected with a relay on the electromagnet through a wire.
5. The continuous bar drawing device according to claim 4, wherein clamping devices are respectively arranged on two sides of the drawing mechanism frame corresponding to the positioning telescopic blocks, each clamping device comprises a double-head shifting fork, the middle part of each double-head shifting fork is hinged to the frame, the lower end of each double-head shifting fork is hinged to the end part of a piston rod of a second cylinder, and the base of the second cylinder is hinged to the frame.
6. A continuous drawing method of a bar, characterized by comprising the steps of:
s1: setting the coiled bar on a turntable, manually rolling one end of the bar to form a first drawing hole, a guide cavity and a second drawing hole sequentially from one side of a first mold core, and clamping the end of the bar by an automatic clamping clamp of a drawing vehicle;
s2: the drawing trolley continuously draws and shapes the bar twice through the first mold core and the second mold core from the initial position to the end position along the guide rail, the automatic clamping pliers are loosened after the drawing trolley reaches the end position, then the bar is returned to the initial position along the guide rail and then automatically clamped, and then the bar is continuously drawn and shaped twice through the first mold core and the second mold core from the initial position to the end position;
s3: and S2, repeating the step until a roll of bar on the meta-disc machine is drawn and molded.
7. A continuous drawing method for a bar material according to claim 6, wherein,
in step S1: setting the coiled bar on a turntable, manually rolling one end of the bar to form a first drawing hole, a guide cavity and a second drawing hole sequentially from one side of a first mold core, clamping the end by an automatic clamping pliers of a drawing vehicle, and fixedly connecting the drawing vehicle with a second drawing mold seat corresponding to the second mold core by an electromagnetic locking mechanism;
in step S2: starting a drawing trolley through a controller, driving a second drawing die holder corresponding to a second die core to draw a bar material to the tail end position along a guide rail by the drawing trolley, carrying out primary drawing on the bar material through a first die core, when the drawing trolley runs to the position of a first position sensor, feeding back a position signal to the controller by the first position sensor, controlling an electromagnetic locking mechanism by a relay to disconnect the drawing trolley from the second drawing die holder by the controller, simultaneously controlling a first air cylinder to act through an electromagnetic valve, enabling a positioning telescopic block to extend out from the lower part of a guide hole on the guide rail to the upper end surface of the guide rail to block the second drawing die holder under the driving of the first air cylinder, controlling the second air cylinder to act through the electromagnetic valve, clamping the second drawing die holder by two sides of the second drawing die holder under the driving of a double-head shifting fork, then continuing to draw the bar material to the tail end position, carrying out secondary drawing on the bar material through the second die core, cooling the bar material after being drawn through the first die core, and carrying out secondary drawing molding by the second die core; after the drawing trolley reaches the tail end position, the automatic clamping pliers are loosened, then the rod is returned to the position of the first position sensor along the guide rail, then the rod is automatically clamped, and is drawn to the tail end position, and the rod is continuously drawn and molded twice through the first mold core and the second mold core;
in step S3: and (2) after the drawing trolley in the step (S2) reaches the tail end position, the automatic clamping pliers are loosened, then the rod is returned to the position of the first position sensor along the guide rail, then the rod is automatically clamped, and is drawn to the tail end position, and the rod is continuously drawn and molded twice through the first mold core and the second mold core until a roll of the rod on the disc machine is drawn and molded.
8. A continuous drawing method for a bar material as recited in claim 7, wherein in step S2: and cooling is carried out between the second drawing and the first drawing through air cooling.
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| CN202310403364.3A CN116422719A (en) | 2023-04-17 | 2023-04-17 | Continuous bar drawing device and drawing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117046909A (en) * | 2023-09-20 | 2023-11-14 | 中天钢铁集团(淮安)新材料有限公司 | Operation method for replacing die chains of drawing die type quick and repeated die penetrating machine and wire drawing machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117046909A (en) * | 2023-09-20 | 2023-11-14 | 中天钢铁集团(淮安)新材料有限公司 | Operation method for replacing die chains of drawing die type quick and repeated die penetrating machine and wire drawing machine |
| CN117046909B (en) * | 2023-09-20 | 2024-06-07 | 中天钢铁集团(淮安)新材料有限公司 | Operation method for replacing die chains of drawing die type quick and repeated die penetrating machine and wire drawing machine |
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