Cold heading mechanism for terminal processing

Abstract

The utility model discloses a cold heading mechanism for terminal processing, and relates to the technical field of cold heading cutting. The cut-off assembly comprises a fixed mold and a movable mold. The bottom of the fixed mold is fixedly mounted on the L-shaped bottom plate; the fixed die comprises a first cut-off die; the movable die comprises a second cutting die; a second semicircular hole and a second cutter slot are formed in the second cutting die; the second cutter slot is matched with the first cutter slot; a first inclined surface is arranged at one end, far away from the first cutting-off die, of the second cutting-off die; a steel wire is conveyed into the straightening assembly through the winding disc, the driven rotating wheels at the ends of the straightening rollers are connected with the driving rotating wheels through the connecting belts, rotation of the straightening rollers is achieved, and winding of the steel wire is achieved through the multiple straightening rollers in the conveying process of the steel wire on the straightening rollers; and therefore, the bending of the steel wire can be effectively straightened, and the quality of the steel wire during cold heading can be effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates specifically to the technical field of cold heading cutting material, and specifically relates to a cold heading mechanism for terminal machining. BACKGROUND

[0002] The cold heading mechanism is a kind of processing mechanism that utilizes the plastic deformation of metal to enlarge the metal material at room temperature.The basic principle is to make the metal blank produce plastic flow in the mold cavity by applying axial pressure, so as to change the shape and size of the blank;For example, the head of a bolt is processed from a cylindrical metal bar by a cold heading mechanism;Under the constraint of the mold, the head metal flows to the periphery, and gradually forms the required shape;

[0003] The existing cold heading mechanism directly conveys raw materials to the cold heading mechanism through a conveying device during processing, so that the raw materials themselves may be bent during winding, and the stress of the raw materials themselves is large, so that the processing quality of the workpiece cannot be effectively guaranteed during processing, and the bending and stress of the raw materials may intensify the friction between the molds during processing, causing damage to the molds during long-term use;

[0004] The existing cold heading mechanism cuts off the raw materials by the equipment itself during work, so that the equipment may be subjected to a large impact effect during work, and may easily vibrate, which may cause deviation between the ejector pin and the mold cavity during cold heading processing, and cannot effectively and accurately cooperate, so that the size or shape of the workpiece may deviate during cold heading processing, so that the yield of the workpiece cannot be effectively guaranteed.

[0005] After searching, the Chinese patent publication No.CN202122271417.X discloses a screw machining cold heading machine auxiliary feeding device;including base, the top of the base is provided with support plate and support frame, the top of the support plate is provided with rotary table, the rotary table is provided with positioning assembly, the support frame is provided with conveying assembly inside;The positioning assembly is used for preventing the movement of the steel wire coil, and includes a fixed plate arranged at the top of the rotary table, a double-way hydraulic rod arranged on the fixed plate, a limiting plate connected to the output end of the double-way hydraulic rod, a spring arranged on the end of the limiting plate away from the double-way hydraulic rod, and a driving assembly arranged in the support plate;The conveying assembly includes a first compression roller arranged in the support frame, and a second compression roller arranged below the first compression roller;

[0006] The feeding device in the patent above realizes the extrusion of the steel wire through the extrusion of the first and second compression rollers, but the position of the steel wire may be deviated when the steel wire is extruded due to the fact that the first and second compression rollers are light shafts, so that the straightening effect on the steel wire cannot be effectively realized, which may cause the steel wire that needs to be stretched in the cold heading process to affect the processing quality due to the bending of the steel wire itself. Practical new type content

[0007] The cold heading mechanism for terminal processing provided by the present application can effectively realize the straightening effect on the steel wire by rotating the straightening rollers after the straightening of the steel wire is completed, and can effectively realize the elimination of the stress inside the steel wire by extruding the steel wire through the first and second rotating rollers, so that the friction between the steel wire and the die during the cold heading process is reduced, the service life of the die is ensured, the cutting effect on the steel wire is realized through the cutting assembly after the straightening and stress elimination are completed, the stability during the cutting of the steel wire is ensured by effectively realizing the clamping of the steel wire by the fixed die and the moving die through the cooperation of the positioning pin and the positioning hole, the cooperation of the matching inclined surface on the pressure rod and the first inclined surface on the second cutting die, and the transfer effect of the steel wire is realized through the mechanical gripper after the cutting is completed, so that the vibration generated by the cold heading mechanism during the cutting of the steel wire is effectively reduced, the processing quality of the cold heading is ensured, and the problems in the background art are solved.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0009] A cold heading mechanism for terminal processing, comprising a cutting assembly; the cutting assembly comprises a fixed die and a moving die; wherein the bottom of the fixed die is fixedly installed on an L-shaped bottom plate; the fixed die comprises a first cutting die; the first cutting die is provided with a positioning hole, a first cutter slot and a first semicircular hole; the moving die comprises a second cutting die; the second cutting die is provided with a second semicircular hole and a second cutter slot; the second cutter slot is matched with the first cutter slot; the first semicircular hole and the second semicircular hole form a perfect circle after being matched; the second cutting die is provided with a first inclined surface at the end away from the first cutting die; the second cutting die is fixedly installed with a connecting rod at the end away from the first cutting die; the connecting rod penetrates through the side plate of the L-shaped bottom plate, and a first spring is sleeved between the end of the connecting rod away from the second cutting die and the L-shaped bottom plate;

[0010] The top of the fixed die and the moving die is matched with a cutter; the cutter is matched with the cavity formed by the first cutter slot and the second cutter slot;

[0011] As a further technical scheme of the utility model, the cutter is fixedly installed at the bottom of the moving plate; the cutter of the moving plate is provided with a pressing rod and a positioning pin on both sides respectively; wherein the positioning pin is matched with the positioning hole of the first cutting-off die; the bottom of the pressing rod is provided with a matching inclined surface; the matching inclined surface is matched with the first inclined surface of the second cutting-off die; the bottom of the pressing rod is further provided with a U-shaped groove; the width of the U-shaped groove is greater than the diameter of the connecting rod;

[0012] As a further technical scheme of the utility model, the moving plate and the push rod of the electric push cylinder are fixedly installed; the electric push cylinder is fixedly installed on the carrier plate; both ends of the bottom of the carrier plate are fixedly installed with the support frame;

[0013] As a further technical scheme of the utility model, one side of the cutting-off assembly is provided with a stress relieving assembly; the stress relieving assembly comprises a fixed plate; a plurality of grooves are formed in the fixed plate; an installation block and a sliding block are placed in the grooves; a first rotating roller is matched and installed on the installation block; a second rotating roller is matched and installed on the sliding block; a second spring is arranged between the top of the sliding block and the inner wall of the groove;

[0014] As a further technical scheme of the utility model, one end of the stress relieving assembly away from the cutting-off assembly is matched and installed with a straightening assembly; the straightening assembly comprises two symmetrical second support frames; a plurality of straightening rollers are matched and installed on the second support frames through bearings; the plurality of straightening rollers are arranged in a triangular shape; the end portions of the two straightening rollers at the bottom are matched and installed with driven rotating wheels; the driven rotating wheels are matched and connected with a driving rotating wheel through a connecting belt; the driving rotating wheel is fixedly installed on the output shaft of a driving device;

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] In use, the steel wire is transmitted to the straightening assembly through the winding disc, the driven rotating wheels at the end portions of the straightening rollers are connected with the driving rotating wheel through the connecting belt, the rotation of the straightening rollers is realized, the steel wire is wound through the plurality of straightening rollers in the transmission process of the steel wire on the straightening rollers, the bending of the steel wire itself is effectively straightened, and the quality of the steel wire in cold heading is effectively ensured;

[0017] After the straightening of the steel wire is completed, the straightened steel wire is transmitted to the stress relieving assembly through the rotation of the straightening rollers, the stress of the steel wire itself is relieved or reduced through the cooperation of the first rotating roller and the second rotating roller, the great friction between the steel wire and the die in cold heading is effectively reduced, and the processing quality of the cold heading mechanism on the steel wire is ensured;

[0018] The utility model discloses, in stress relief assembly to steel wire processing is completed again and then the steel wire is transmitted to the cutting assembly, when cutting the steel wire, the steel wire penetrates first semicircle hole and second semicircle hole, through the electric push jar drive the cutting knife of movable plate bottom and move down into the first cutter insertion slot of first cutting mould that sets up and the second cutter insertion slot of second cutting mould that sets up, realize the cutting effect of steel wire, when cutting knife moves down, the press rod and the positioning pin of movable plate bottom both ends move down, and the cooperation slope on the press rod contacts the first slope on second cutting mould, realizes extruding the movable mould to the side of fixed mould, guarantees the stability of fixed mould and movable mould when cutting the steel wire,

[0019] The utility model discloses, in the press rod extrusion to movable mould, movable mould slides to the side of fixed mould to make second cutting mould and second cutter insertion slot cooperate, first semicircle hole and second semicircle hole cooperate, and link forward extension, and the U type slot on the press rod cooperates with link, avoids the situation of blocking, after cutting, press rod, positioning pin and cutting knife move up, after the press rod and movable mould separate, link moves back under the action of spring, realizes the separation between fixed mould and movable mould, realizes the cold heading processing treatment through the mechanical clamping hand and realizes the steel wire that cutting is completed and is transferred to the cold heading mechanism. ACCURACY OF DRAWINGS

[0020] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0021] Figure 2 It is another visual angle structure schematic diagram of the utility model in Figure 1 .

[0022] Figure 3 It is the rear side structure schematic diagram of the utility model in Figure 1 .

[0023] Figure 4 It is the front view of the utility model in Figure 1 .

[0024] Figure 5 It is the A-A section view of the utility model in Figure 4 .

[0025] Figure 6 It is the local structure enlarged view of B of the utility model in Figure 3 .

[0026] In the figure: 1 - base plate, 2 - straightening assembly, 20 - second support frame, 21 - straightening roller, 22 - driven rotary wheel, 23 - connecting belt, 24 - driving rotary wheel, 3 - stress relief assembly, 30 - fixed plate, 31 - first rotary roller, 32 - second rotary roller, 33 - second spring, 34 - sliding block, 4 - steel wire, 5 - cutting-off assembly, 50 - first support frame, 51 - fixed die, 510 - first cutting-off die, 511 - positioning hole, 512 - first cutter insertion slot, 513 - first semicircular hole, 52 - moving plate, 53 - carrier plate, 54 - electric push cylinder, 55 - moving die, 550 - second cutting-off die, 551 - second semicircular hole, 552 - second cutter insertion slot, 553 - first inclined surface, 56 - pressing rod, 560 - U-shaped groove, 561 - matching inclined surface, 57 - connecting rod, 58 - first spring, 59 - L-shaped base plate, 514 - positioning pin, 515 - cutter. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] Please refer to Figures 1-6 In the embodiments of the utility model, a cold heading mechanism for terminal machining comprises a cutting-off assembly 5. The cutting-off assembly 5 comprises a fixed die 51 and a moving die 55. The bottom of the fixed die 51 is fixedly installed on an L-shaped base plate 59. The fixed die 51 comprises a first cutting-off die 510. The first cutting-off die 510 is provided with a positioning hole 511, a first cutter insertion slot 512 and a first semicircular hole 513. The moving die 55 comprises a second cutting-off die 550. The second cutting-off die 550 is provided with a second semicircular hole 551 and a second cutter insertion slot 552. The second cutter insertion slot 552 cooperates with the first cutter insertion slot 512. The first semicircular hole 513 cooperates with the second semicircular hole 551 to form a perfect circle. The end of the second cutting-off die 550 away from the first cutting-off die 510 is provided with a first inclined surface 553. The end of the second cutting-off die 550 away from the first cutting-off die 510 is fixedly installed with a connecting rod 57. The connecting rod 57 penetrates through the side plate of the L-shaped base plate 59, and a first spring 58 is sleeved between the end of the connecting rod 57 away from the second cutting-off die 550 and the L-shaped base plate 59.

[0029] The top of the fixed die 51 and the moving die 55 is provided with a cutter 515 in cooperation. The cutter 515 cooperates with the cavity formed by the first cutter insertion slot 512 and the second cutter insertion slot 552.

[0030] The cutter 515 is fixedly installed at the bottom of the movable plate 52; a pressure rod 56 and a positioning pin 514 are respectively provided on both sides of the cutter 515 on the movable plate 52; wherein, the positioning pin 514 cooperates with the positioning hole 511 opened on the first cutting mold 510; the bottom of the pressure rod 56 is provided with a mating inclined surface 561; the mating inclined surface 561 cooperates with the first inclined surface 553 provided on the second cutting mold 550; the bottom of the pressure rod 56 is also provided with a U-shaped groove 560; the width of the U-shaped groove 560 is greater than the diameter of the connecting rod 57.

[0031] By adopting the above technical solution, during use, the steel wire 4 is transported to the straightening assembly 2 via the winding reel. The driven roller 22 at the end of the straightening roller 21 is connected to the driving roller 24 via the connecting belt 23, thereby realizing the rotation of the straightening roller 21. During the process of the steel wire 4 being transported on the straightening roller 21, the steel wire 4 is wound around by multiple straightening rollers 21, thereby effectively straightening the bending of the steel wire 4 itself, thus effectively ensuring the quality of the steel wire 4 during cold heading.

[0032] After the steel wire 4 is straightened, the straightened steel wire 4 is transferred to the stress relief assembly 3 by the rotation of the straightening roller 21. Through the cooperation of the first roller 31 and the second roller 32, the large stress of the steel wire 4 itself is eliminated or reduced, thereby effectively reducing the large friction between the steel wire 4 and the die during cold heading, and ensuring the processing quality of the steel wire 4 by the cold heading mechanism.

[0033] In this embodiment, the movable plate 52 is fixedly installed with the push rod of the electric push cylinder 54; the electric push cylinder 54 is fixedly installed on the carrier plate 53; both ends of the bottom of the carrier plate 53 are fixedly installed with the first support frame 50.

[0034] The cutting component 5 is provided with a stress relief component 3 on one side; the stress relief component 3 includes a fixing plate 30; the fixing plate 30 has a plurality of grooves, in which a mounting block and a slider 34 are placed, wherein a first rotating roller 31 is mounted on the mounting block; a second rotating roller 32 is mounted on the slider 34; a second spring 33 is provided between the top of the slider 34 and the inner wall of the groove.

[0035] Through adoption of the above technical scheme, after the stress relief assembly 3 finishes processing the steel wire 4, the steel wire 4 is transmitted to the cutting assembly 5, when the steel wire 4 is cut, the steel wire 4 penetrates through the first semicircular hole 513 and the second semicircular hole 551, the cutter 515 at the bottom of the moving plate 52 is driven by the electric push cylinder 54 to move downwards into the first cutter insertion slot 512 arranged on the first cutting die 510 and the second cutter insertion slot 552 arranged on the second cutting die 550, the cutting effect on the steel wire 4 is realized, when the cutter 515 moves downwards, the pressing rods 56 and the positioning pins 514 at both ends of the bottom of the moving plate 52 move downwards at the same time, the matching inclined surface 561 on the pressing rod 56 contacts the first inclined surface 553 on the second cutting die 550, the moving die 55 is pressed to one side of the fixed die 51, the stability of the fixed die 51 and the moving die 55 when cutting the steel wire 4 is ensured;

[0036] In the embodiment, the stress relief assembly 3 is installed in cooperation with the straightening assembly 2 at one end away from the cutting assembly 5; the stress relief assembly 3 and the straightening assembly 2 are fixedly installed on the bottom plate 1; the straightening assembly 2 comprises two symmetrical second supporting frames 20; a plurality of straightening rollers 21 are installed in cooperation with bearings on the second supporting frames 20; the plurality of straightening rollers 21 are arranged in a triangular shape; end portions of two straightening rollers 21 at the bottom are installed in cooperation with driven pulleys 22; the driven pulleys 22 are connected in cooperation with a driving pulley 24 through a connecting belt 23; the driving pulley 24 is fixedly installed on an output shaft of a driving device;

[0037] Through adoption of the above technical scheme, when the pressing rods 56 press the moving die 55, the moving die 55 slides to one side of the fixed die 51, so that the second cutting die 550 and the second cutter insertion slot 552 cooperate, the first semicircular hole 513 and the second semicircular hole 551 cooperate, and the connecting rod 57 extends forward, the U-shaped groove 560 on the pressing rod 56 cooperates with the connecting rod 57, so that the blocking condition is avoided, after cutting, the pressing rods 56, the positioning pins 514 and the cutter 515 move upwards, after the pressing rods 56 are separated from the moving die 55, the connecting rod 57 moves backwards under the action of the first spring 58, so that the fixed die 51 and the moving die 55 are separated, the steel wire 4 after cutting is transferred to a cold heading mechanism through the mechanical gripper, and cold heading processing is realized.

[0038] The working principle of the utility model is: in use, the steel wire 4 is transmitted to the straightening assembly 2 through the winding disc, the driven pulleys 22 at the end portions of the straightening rollers 21 are connected with the driving pulley 24 through the connecting belt 23, the rotation of the straightening rollers 21 is realized, the steel wire 4 is wound through the plurality of straightening rollers 21 in the process of transmission on the straightening rollers 21, so that the bending of the steel wire 4 itself is effectively straightened, and the quality of the steel wire 4 in cold heading is effectively ensured.

[0039] After the straightening of the steel wire 4 is completed, the straightened steel wire 4 is transmitted into the stress relief assembly 3 through the rotation of the straightening roller 21, and the cooperation of the first rotating roller 31 and the second rotating roller 32 realizes the elimination or reduction of the stress of the steel wire 4 itself, thereby effectively reducing the large friction between the steel wire 4 and the die during cold heading, and ensuring the processing quality of the cold heading mechanism on the steel wire 4.

[0040] After the treatment of the steel wire 4 by the stress relief assembly 3 is completed, the steel wire 4 is transmitted into the cutting assembly 5, and when the steel wire 4 is cut, the steel wire 4 penetrates through the first semicircular hole 513 and the second semicircular hole 551, the cutter 515 at the bottom of the moving plate 52 is driven by the electric push cylinder 54 to move downward into the first cutter insertion slot 512 opened on the first cutting die 510 and the second cutter insertion slot 552 opened on the second cutting die 550, and the cutting effect on the steel wire 4 is realized, and when the cutter 515 moves downward, the pressing rods 56 and the positioning pins 514 at both ends of the bottom of the moving plate 52 move downward at the same time, the matching inclined surface 561 on the pressing rod 56 contacts the first inclined surface 553 on the second cutting die 550, the moving die 55 is pressed to one side of the fixed die 51, and the stability of the fixed die 51 and the moving die 55 during the cutting of the steel wire 4 is ensured.

[0041] When the pressing rod 56 presses the moving die 55, the moving die 55 slides to one side of the fixed die 51, so that the second cutting die 550 and the second cutter insertion slot 552 cooperate, the first semicircular hole 513 and the second semicircular hole 551 cooperate, and the connecting rod 57 extends forward, the U-shaped groove 560 on the pressing rod 56 cooperates with the connecting rod 57 to avoid blocking, after cutting, the pressing rod 56, the positioning pin 514 and the cutter 515 move upward, after the pressing rod 56 is separated from the moving die 55, the connecting rod 57 moves backward under the action of the first spring 58, the separation between the fixed die 51 and the moving die 55 is realized, the cut steel wire 4 is transported to the cold heading mechanism by the mechanical gripper, and the cold heading processing is realized.

[0042] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0043] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A cold heading mechanism for terminal processing, characterized in that: The cutting assembly (5) comprises a fixed die (51) and a moving die (55); the bottom of the fixed die (51) is fixedly installed on an L-shaped bottom plate (59); the fixed die (51) comprises a first cutting die (510); the first cutting die (510) is provided with a positioning hole (511), a first cutter slot (512) and a first semicircular hole (513); the moving die (55) comprises a second cutting die (550); the second cutting die (550) is provided with a second semicircular hole (551) and a second cutter slot (552); the second cutter slot (552) is matched with the first cutter slot (512); the first semicircular hole (513) and the second semicircular hole (551) are matched to form a full circle; the end of the second cutting die (550) away from the first cutting die (510) is provided with a first inclined surface (553); the end of the second cutting die (550) away from the first cutting die (510) is fixedly installed with a connecting rod (57); the connecting rod (57) penetrates through the side plate of the L-shaped bottom plate (59), and a first spring (58) is sleeved between the end of the connecting rod (57) away from the second cutting die (550) and the L-shaped bottom plate (59). The top of the fixed die (51) and the moving die (55) is provided with a cutter (515) in a matched mode; the cutter (515) is matched with the cavity formed by the first cutter slot (512) and the second cutter slot (552).

2. The cold heading mechanism for terminal processing according to claim 1, characterized by: The cutter (515) is fixedly installed at the bottom of a moving plate (52); the cutter (515) of the moving plate (52) is provided with a pressing rod (56) and a positioning pin (514) on the two sides thereof; the positioning pin (514) is matched with the positioning hole (511) formed on the first cutting die (510); the bottom of the pressing rod (56) is provided with a matched inclined surface (561); the matched inclined surface (561) is matched with the first inclined surface (553) provided on the second cutting die (550); the bottom of the pressing rod (56) is further provided with a U-shaped groove (560); the width of the U-shaped groove (560) is greater than the diameter of the connecting rod (57).

3. The cold heading mechanism for terminal processing according to claim 2, characterized by: The moving plate (52) and the push rod of an electric push cylinder (54) are fixedly installed; the electric push cylinder (54) is fixedly installed on a carrier plate (53); the two ends of the bottom of the carrier plate (53) are fixedly installed with a first support frame (50).

4. The cold heading mechanism for terminal processing according to claim 3, characterized by: One side of the cutting assembly (5) is provided with a stress relief assembly (3); the stress relief assembly (3) comprises a fixed plate (30); a plurality of grooves are formed in the fixed plate (30); an installation block and a sliding block (34) are placed in the grooves; a first rotating roller (31) is installed on the installation block in a matched mode; a second rotating roller (32) is installed on the sliding block (34) in a matched mode; a second spring (33) is arranged between the top of the sliding block (34) and the inner wall of the groove.

5. The cold heading mechanism for terminal processing according to claim 4, characterized by: The stress relief assembly (3) is installed in cooperation with the straightening assembly (2) away from one end of the cutting assembly (5); the straightening assembly (2) comprises two symmetrical second supporting frames (20); a plurality of straightening rollers (21) are installed in cooperation with the second supporting frames (20) through bearings; the plurality of straightening rollers (21) are arranged in a triangular shape; the end portions of the two straightening rollers (21) at the bottom are installed in cooperation with driven rotary wheels (22); the driven rotary wheels (22) are connected in cooperation with a driving rotary wheel (24) through a connecting belt (23); and the driving rotary wheel (24) is fixedly installed on the output shaft of a driving device.

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