High-speed intelligent cold heading forming machine

Abstract

The present invention relates to the technical field of cold heading machines, specifically to a high-speed intelligent cold heading forming machine, which includes the overall cold heading machine and a moving die and a closing die installed on the overall cold heading machine. Damping extrusion components and impact components are respectively installed at both ends of the closing die. The damping extrusion components and the impact components are interconnected with each other. The damping extrusion components include two bevel arc-shaped blocks slidably installed near the port of the closing die. Two fixed frames are symmetrically and fixedly installed on the outer side of the closing die. By installing the damping extrusion components at the closing die, it can not only quickly help the blank to be discharged from the closing die, but also relieve part of the kinetic energy when the moving die and the closing die start to contact, reducing the fracture of the blank when it is just under extrusion. At the same time, through the impact components, it can further help the discharge of the blank, and with the assistance of lubricating oil, it can reduce the adhesion between the blank and the inside of the closing die, effectively improving the blank discharging work.

Description

Technical Field

[0001] The present invention relates to the technical field of cold heading machines, and particularly to a high-speed intelligent cold heading forming machine. Background Art

[0002] A cold heading machine is a special equipment mainly used for mass-producing fasteners such as nuts and bolts by heading. Usually, a cylindrical blank is formed into the shape of a nut or other parts through the action of opening and closing the die.

[0003] The parts processed by the cold heading machine do not need to be heated, and they will quickly deform when forming the shape. During the production process, after the parts are formed, components such as a manipulator are used to clamp out the parts. However, due to the rapid deformation of the parts at low temperature, the tail end of the parts is prone to break in the die and cause adhesion between the parts and the die. Moreover, the manipulator can only clamp a part of the end of the part, and under the influence of cold heading oil, it is very difficult to take out the parts, which will affect the subsequent work process. Summary of the Invention

[0004] In view of the above-mentioned drawbacks of the prior art, the present invention provides a high-speed intelligent cold heading forming machine, which can effectively solve the problems in the prior art.

[0005] To achieve the above object, the present invention is realized through the following technical solutions:

[0006] The present invention provides a high-speed intelligent cold heading forming machine, including the overall cold heading machine and a moving die and a closing die installed on the overall cold heading machine. Damping extrusion components and impact components are respectively installed at both ends of the closing die, and the damping extrusion components and the impact components are interconnected;

[0007] Among them, the damping extrusion component includes two inclined surface arc blocks slidably installed near the port of the closing die. Two fixing frames are symmetrically and fixedly installed on the outside of the closing die. The two fixing frames correspond to the inclined surface arc blocks, and a return spring is fixedly installed between the fixing frames and the inclined surface arc blocks.

[0008] Further, the damping extrusion component further includes two magnetic tracks embedded in the closing die. A metal core is fixedly installed at the bottom of the inclined surface arc block, and the metal core is in the magnetic field of the magnetic track. The magnetic track is composed of two pairs of magnets with opposite polarities. The metal core is between the magnet blocks with opposite polarities of the two pairs. The magnetic field intensity of the same-side magnets in the magnetic track changes from strong to weak from the axis of the closing die to the outside.

[0009] Further, a magnetic shielding frame is fixedly installed at the outer end of the metal core, and the length of the magnetic shielding frame is greater than the length of the magnets in a section of the magnetic track.

[0010] Further, buffer air bags are fixedly installed on the side walls of the two inclined surface arc blocks close to each other. An exhaust pipe and an air inlet pipe are installed through the buffer air bag, and one-way valves are installed on both the exhaust pipe and the air inlet pipe.

[0011] Further, the impact assembly includes an exhaust box fixedly installed on the side wall of the mold clamping and a ejector rod sliding in the axis of the mold clamping. The outer end of the exhaust pipe is installed through the side plate of the exhaust box. A jet groove is formed in the ejector rod, and a jet pipe is installed between the jet groove and the exhaust box in a communicating manner.

[0012] Further, one side of the mold clamping is fixedly installed with, and a pipe penetrates through the bottom end of the and is communicated with the jet groove through the pipe.

[0013] Further, a sliding plate is slidably installed in the exhaust box. A communicating pipe is embedded in the sliding plate. A fixing plate is fixedly installed in the communicating pipe. A piston is slidably inserted in the fixing plate. A limiting spring is fixedly connected between one side of the piston and the fixing plate. An extrusion strip that can contact the piston is arranged in the jet pipe.

[0014] Further, a resistance spring is fixedly connected between the sliding plate and the inner wall of the side plate of the exhaust box. The sliding plate is made of iron, and a limiting magnet that generates a magnetic suction force on the sliding plate is fixedly installed on the side plate of the exhaust box.

[0015] The technical solution provided by the present invention has the following beneficial effects compared with the known public technology:

[0016] By installing a damping extrusion assembly at the mold clamping, the present invention can not only quickly help the blank to be discharged from the mold clamping, but also relieve part of the kinetic energy when the moving mold and the mold clamping start to contact, reduce the fracture of the blank when it is just squeezed, and at the same time, through the impact assembly, it can further help the discharge of the blank, and with the assistance of lubricating oil, it can reduce the adhesion between the blank and the mold clamping, effectively improving the discharging work of the blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure at the moving mold of the present invention;

[0020] Figure 3 Structural schematic diagram of the mold closing part of the present invention;

[0021] Figure 4 Structural schematic diagram of the internal part of the mold closing of the present invention;

[0022] Figure 5 Structural schematic diagram of the magnetic track part of the present invention;

[0023] Figure 6 Structural schematic diagram of the impact component part of the present invention;

[0024] Figure 7 For the present invention Figure 6 Enlarged view of part A in;

[0025] Figure 8 For the present invention Figure 2 Enlarged view of part B in;

[0026] Figure 9 For the present invention Figure 6 Enlarged view of part C in.

[0027] The reference numerals in the figure respectively represent: 1. Overall cold heading machine; 2. Moving mold; 3. Mold closing; 4. Damping extrusion component; 401. Inclined surface arc block; 402. Magnetic track; 403. Magnetic shielding frame; 404. Fixed frame; 405. Return spring; 406. Buffer airbag; 407. Exhaust pipe; 408. Intake pipe; 409. Metal core; 5. Impact component; 501. Ejector rod; 502. Exhaust box; 503. Slide plate; 504. Connecting pipe; 505. Fixed plate; 506. Piston; 507. Jet pipe; 508. Jet groove; 509. Resistance spring; 510. Limit magnet; 511. Limit spring. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] The present invention will be further described below with reference to the embodiments.

[0030] Embodiment:

[0031] Refer to Figures 1 to 9, High-speed intelligent cold heading forming machine, including the overall cold heading machine 1, the moving die 2 and the closing die 3 installed on the overall cold heading machine 1. There are many control components, power components, etc. inside the overall cold heading machine 1. Since these components belong to the prior art and are easily known to those skilled in the art, they are not fully shown in the figure and will not be elaborated here. The two ends of the closing die 3 are respectively installed with a damping extrusion component 4 and an impact component 5, and the damping extrusion component 4 and the impact component 5 are interconnected;

[0032] Among them, the damping extrusion component 4 includes two bevel arc-shaped blocks 401 slidably installed near the ports of the closing die 3. Two fixing frames 404 are symmetrically and fixedly installed on the outer side of the closing die 3. The two fixing frames 404 correspond to the bevel arc-shaped blocks 401, and a return spring 405 is fixedly installed between the fixing frames 404 and the bevel arc-shaped blocks 401.

[0033] Specifically, referring to Figures 1 to 9 , the damping extrusion component 4 further includes two magnetic tracks 402 embedded in the closing die 3. A metal core 409 is fixedly installed at the bottom of the bevel arc-shaped block 401. The metal core 409 is in the magnetic field of the magnetic track 402. The magnetic track 402 is composed of two pairs of magnets with opposite polarities. The metal core 409 is between the pairs of magnets with opposite polarities. The magnetic field intensity of the same-side magnets in the magnetic track 402 changes from strong to weak from the axis of the closing die 3 outwards.

[0034] When performing cold heading work, the blank needs to be placed in the die set 3, and the moving die 2 is used to extrude the die set 3, so that the blank forms the shape of the internal mold of the die set 3. During the process of the moving die 2 approaching the die set 3, the moving die 2 will first squeeze the inclined surface arc block 401 at the port position of the die set 3, and through the extrusion action on the inclined surface arc block 401, the inclined surface arc block 401 will quickly slide to both sides. During this process, the return spring 405 will be compressed, and the metal core 409 will move to the position with the weakest magnetic force in the magnetic track 402. After the moving die 2 completes the extrusion position and returns to its original position, the inclined surface arc block 401 returns to its original position under the elastic force of the return spring 405. At the same time, the metal core 409 will move in a gradually increasing magnetic field, and the gradually increasing magnetic field will generate a gradually increasing magnetic suction force on the metal core 409, thereby accelerating the movement of the metal core 409 back to its original position and driving the inclined surface arc block 401 to return to its original position more quickly. In this way, when the inclined surface arc block 401 approaches the entrance of the die set 3, the inclined surface arc block 401 will exert an extrusion force on the end of the blank in the die set 3, and use the inclined surface of the inclined surface arc block 401 to extrude the blank in the die set 3. At the same time, this process is affected by the elastic force of the return spring 405 and the acceleration effect of the magnetic track 402 on the inclined surface arc block 401, so that the force of the inclined surface arc block 401 squeezing the blank is relatively large, and the blank can be extruded very smoothly, thereby effectively reducing the situation where the blank is stuck in the die set 3 and cannot be taken out.

[0035] Specifically, referring to Figures 1 to 9 , a magnetic shielding frame 403 is fixedly installed at the outer end of the metal core 409, and the length of the magnetic shielding frame 403 is greater than the length of the magnet in a section of the magnetic track 402.

[0036] When the moving die 2 just starts to squeeze the inclined surface arc block 401, the metal core 409 on the inclined surface arc block 401 will slowly pass through the magnetic field of the magnetic track 402. Since the metal core 409 is a conductive material, an induced current will be generated in the metal core 409 during the process of the metal core 409 passing through the magnetic field on the magnetic track 402, so that part of the moving potential energy of the inclined surface arc block 401 is absorbed, reducing the moving kinetic energy of the moving die 2 when it first contacts the die set 3, avoiding the blank bearing a large kinetic energy when it is first formed in the die set 3, preventing the blank from breaking or cracking in the die set 3, and further avoiding the blank being stuck in the die set 3.

[0037] It should be noted that since the magnetic field intensity of the magnetic track 402 is variable, in order to avoid the influence of adjacent magnetic fields on the metal core 409, that is, to reduce the damping effect of the magnetic field on the metal core 409, through the shielding of the magnetic shielding frame 403, the influence of the magnetic field of the magnetic track 402 that has not passed yet on the metal core 409 can be weakened. At the same time, the position of the magnetic shielding frame 403 will not affect the acceleration effect of the magnetic track 402 on the metal core 409. At the same time, when the metal core 409 leaves the magnetic track 402, the effect of absorbing kinetic energy will also disappear, and there will be no large loss of the kinetic energy of the moving die 2.

[0038] Specifically, referring to Figures 1 to 9 , buffer air bags 406 are fixedly installed on the side walls of the two inclined surface arc-shaped blocks 401 close to each other. An exhaust pipe 407 and an air inlet pipe 408 are installed through the buffer air bag 406, and one-way valves are installed on both the exhaust pipe 407 and the air inlet pipe 408.

[0039] When the two inclined surface arc-shaped blocks 401 approach each other, due to the acceleration of the inclined surface arc-shaped blocks 401 by the magnetic track 402, the kinetic energy at the moment of their approaching is relatively large. In order to protect the blank and also protect the inclined surface arc-shaped blocks 401, when the inclined surface arc-shaped blocks 401 come into contact with each other, the buffer air bag 406 will absorb part of the kinetic energy. At the same time, the buffer air bag 406 can exhaust air outward through the exhaust pipe 407 and supplement gas inward through the air inlet pipe 408 to increase the service life of the buffer air bag 406.

[0040] Specifically, referring to Figures 1 to 9 , the impact assembly 5 includes an exhaust box 502 fixedly installed on the side wall of the mold clamping 3 and a ejector rod 501 sliding in the axis center of the mold clamping 3. The outer end of the exhaust pipe 407 is installed through the side plate of the exhaust box 502. A jet groove 508 is formed in the ejector rod 501, and a jet pipe 507 is installed between the jet groove 508 and the exhaust box 502 in a communicating manner.

[0041] When the exhaust pipe 407 exhausts air outward, the gas discharged from the exhaust pipe 407 will be ejected into the jet groove 508 through the exhaust box 502 and the jet pipe 507, and blow the blank inside the mold clamping 3 to help the blank be discharged from the mold clamping 3, which can further assist the discharging action of the blank.

[0042] Specifically, referring to Figures 1 to 9 , one side of the mold clamping 3 is fixedly installed with 6, and the bottom end of the 6 is installed through a pipe and is connected to the jet groove 508 through the pipe.

[0043] When there is gas flow in the jet groove 508, the lubricating oil droplets dripping from 6 will, under the action of the air flow, be sprayed into the mold clamping 3 through the jet groove 508, distributing the lubricating oil in the mold clamping 3. Then, when the next blank enters the mold clamping 3, it will come into contact with the lubricating oil in the mold clamping 3. After the blank is formed, under the influence of the lubricating oil, it can be discharged from the mold clamping 3 more smoothly. At the same time, since the cold heading oil itself has the effects of cooling and lubrication, the user does not need to actively add lubricating oil to 6, and only needs to collect the cold heading oil dripping during the operation of the device through the mesh holes on 6.

[0044] Specifically, referring to Figures 1 to 9 , a sliding plate 503 is slidably installed in the exhaust box 502. A connecting pipe 504 is embedded in the sliding plate 503. A fixing plate 505 is fixedly installed in the connecting pipe 504. A piston 506 is slidably inserted into the fixing plate 505. A limiting spring 511 is fixedly connected between one side of the piston 506 and the fixing plate 505. An extrusion strip that can contact the piston 506 is provided in the air injection pipe 507.

[0045] Specifically, referring to Figures 1 to 9 , a resistance spring 509 is fixedly connected between the sliding plate 503 and the inner wall of the side plate of the exhaust box 502. The sliding plate 503 is made of iron. A limiting magnet 510 that generates a magnetic suction force on the sliding plate 503 is fixedly installed on the side plate of the exhaust box 502.

[0046] When the exhaust pipe 407 blows gas into the exhaust box 502, the air pressure on one side of the sliding plate 503 continuously increases and continuously pushes the sliding plate 503 to move to one side, compressing the resistance spring 509. When the connecting pipe 504 on the sliding plate 503 contacts the air injection pipe 507, the air injection pipe 507 will squeeze the piston 506 and make the piston 506 leave the connecting pipe 504, causing the piston 506 to lose the blocking effect on the connecting pipe 504. At this time, the air pressure on one side of the sliding plate 503 will enter the air injection pipe 507 along the connecting pipe 504. At the same time, the resistance spring 509 is in the maximum compressed state, and the limiting magnet 510 adsorbs the sliding plate 503. In this way, the gas on one side of the sliding plate 503 will impact into the jet groove 508 at a relatively high pressure, thereby improving the effect of extruding the blank in the mold clamping 3.

[0047] It should be noted that after the air pressure on one side of the sliding plate 503 becomes smaller, the sliding plate 503 will return to its original position under the elastic force of the resistance spring 509. At this time, since the piston 506 loses contact with the air injection pipe 507, it will return to its original position under the action of the limiting spring 511 and continue to block the connecting pipe 504.

[0048] Working principle: When cold heading, the blank needs to be placed in the die set 3, and the moving die 2 is used to extrude the die set 3, so that the blank forms the shape of the internal mold of the die set 3. During the process of the moving die 2 approaching the die set 3, the moving die 2 will first squeeze the inclined surface arc block 401 at the port position of the die set 3, and through the squeezing action on the inclined surface arc block 401, the inclined surface arc block 401 will quickly slide to both sides. During this process, the return spring 405 will be compressed, and the metal core 409 will move to the position with the weakest magnetic force in the magnetic track 402. After the moving die 2 completes the extrusion position and returns to its original position, the inclined surface arc block 401 returns to its original position under the elastic force of the return spring 405. At the same time, the metal core 409 will move in a gradually increasing magnetic field, and the gradually increasing magnetic field will generate a gradually increasing magnetic suction force on the metal core 409, thereby accelerating the movement of the metal core 409 back to its original position and driving the inclined surface arc block 401 to return to its original position more quickly. In this way, when the inclined surface arc block 401 is close to the entrance of the die set 3, the inclined surface arc block 401 will play a role in squeezing the end of the blank in the die set 3, and use the inclined surface of the inclined surface arc block 401 to extrude the blank in the die set 3. At the same time, this process is affected by the elastic force of the return spring 405 and the acceleration effect of the magnetic track 402 on the inclined surface arc block 401, so that the force of the inclined surface arc block 401 squeezing the blank is relatively large, and the blank can be extruded very smoothly, thereby effectively reducing the situation where the blank is stuck in the die set 3 and cannot be taken out.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. High-speed intelligent cold heading forming machine, comprising the overall cold heading machine (1), a moving die (2) and a closing die (3) installed on the overall cold heading machine (1), characterized in that, Damping extrusion components (4) and impact components (5) are respectively installed at both ends of the mold clamping (3), and the damping extrusion components (4) and the impact components (5) are interconnected with each other; Among them, the damping extrusion component (4) includes two bevel arc blocks (401) slidably installed near the ports of the mold clamping (3). Two fixing frames (404) are symmetrically and fixedly installed on the outer side of the mold clamping (3). The two fixing frames (404) correspond to the bevel arc blocks (401), and a return spring (405) is fixedly installed between the fixing frames (404) and the bevel arc blocks (401); The damping extrusion component (4) further includes two magnetic tracks (402) embedded in the mold clamping (3). A metal core (409) is fixedly installed at the bottom of the bevel arc block (401). The metal core (409) is in the magnetic field of the magnetic track (402). The magnetic track (402) is composed of two pairs of magnets with opposite polarities facing each other. The metal core (409) is between the two pairs of magnets with opposite polarities facing each other. The magnetic field intensity of the same-side magnets in the magnetic track (402) changes from strong to weak outward from the axis of the mold clamping (3); Buffer air bags (406) are fixedly installed on the side walls of the two bevel arc blocks (401) close to each other. An exhaust pipe (407) and an air inlet pipe (408) are penetrated and installed on the buffer air bag (406), and one-way valves are installed on both the exhaust pipe (407) and the air inlet pipe (408); The impact component (5) includes an exhaust box (502) fixedly installed on the side wall of the mold clamping (3) and a push rod (501) sliding in the axis of the mold clamping (3). The outer end of the exhaust pipe (407) is penetrated and installed on the side plate of the exhaust box (502). A jet groove (508) is opened in the push rod (501), and a jet pipe (507) is connected and installed between the jet groove (508) and the exhaust box (502); A sliding plate (503) is slidably installed in the exhaust box (502). A connecting pipe (504) is embedded in the sliding plate (503). A fixing plate (505) is fixedly installed in the connecting pipe (504). A piston (506) is slidably inserted in the fixing plate (505). A limiting spring (511) is fixedly connected between one side of the piston (506) and the fixing plate (505). An extrusion strip that can contact the piston (506) is provided in the jet pipe (507); A resistance spring (509) is fixedly connected between the sliding plate (503) and the inner wall of the side plate of the exhaust box (502). The sliding plate (503) is made of iron, and a limiting magnet (510) that generates a magnetic suction force on the sliding plate (503) is fixedly installed on the side plate of the exhaust box (502).

2. The high-speed intelligent cold heading forming machine according to claim 1, characterized in that, A magnetic shielding frame (403) is fixedly installed at the outer end of the metal core (409). The length of the magnetic shielding frame (403) is greater than the length of the magnets in a section of the magnetic track (402).

Images