Conveying mechanism and conveying process applied to screw cold heading equipment

Abstract

The transmission mechanism comprises a rack, a frame opening is formed in the rack, an inner frame is installed in the frame opening, a first limiting part and a second limiting part which are horizontally arranged are arranged in the inner frame, one set of the first limiting part and the second limiting part is fixed, and the other set of the first limiting part and the second limiting part is sliding. A driving part for controlling the limiting part II to slide is arranged on the outer side of the limiting part I; the first limiting part and the second limiting part are both used for clamping the wire rod, and when one set of the first limiting part and the second limiting part clamps the wire rod, the other set loosens and changes alternately. According to the feeding wheel, the fixed metal pieces and the movable metal pieces in the first limiting part and the second limiting part are in surface contact to clamp the wire, compared with line contact of a traditional feeding wheel, the contact area is remarkably increased, the clamping pressure is dispersed, and even under the condition that metal chippings exist, indentations or damage can be greatly avoided on the surface of the wire.

Description

Technical Field

[0001] This invention relates to the field of screw processing technology, specifically to a transmission mechanism and transmission process applied to screw cold heading equipment. Background Technology

[0002] In the cold heading process of screws, the coiled wire needs to be continuously, stably, and precisely fed into the first station of the cold heading machine, which is generally the cutting station. The wire feeding system typically consists of one or more pairs of grooved rollers driven by servo motors or hydraulic motors. By pressing and rotating the wire, it is forcibly pushed forward. The feeding length is precisely controlled by the equipment's control system, determining the length of the cut blank and directly affecting the final product's dimensions.

[0003] In actual wire feeding, the feeding roller needs to clamp the wire and drive it to move as the roller rotates. During this process, the pressure exerted by the feeding roller on the wire needs to be controlled. Excessive pressure can cause deformation of the wire, especially if metal fragments are present, directly leading to surface defects that affect the precision of the bolts after forming. Conversely, insufficient pressure will cause friction between the wire and other components during movement, requiring a certain driving force. Therefore, insufficient feeding roller pressure will directly lead to slippage, especially if the wire has protective oil residue to prevent rust. This results in decreased cutting precision in subsequent processes; a small feeding deviation can be amplified at each subsequent station, ultimately leading to batch scrap.

[0004] Therefore, a new way is needed to drive the wire, to ensure that the wire is not damaged during operation, and to ensure the accuracy of the wire operation. Summary of the Invention

[0005] The purpose of this invention is to provide a transmission mechanism and transmission process for cold heading equipment for screws, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a transmission mechanism applied to a screw cold heading equipment, including a frame, a frame opening on the frame, an inner frame installed in the frame opening, and two sets of horizontally arranged limiting parts one and two limiting parts two in the inner frame. One set of limiting parts one and the other set of limiting parts two are fixed and sliding. A driving component for controlling the sliding of limiting parts two is provided on the outside of limiting parts one.

[0007] Both the first limiting part and the second limiting part are used to clamp the wire. When one set clamps, the other set is released, and the two sets alternate.

[0008] Furthermore, sliding openings are provided on both sides of the inner frame;

[0009] The limiting part includes a fixed sleeve and a fixed end cap fixed to the opening end of the fixed sleeve. The fixed sleeve has two layers of fixed metal parts for clamping the wire. A control part is provided on the outside of both layers of fixed metal parts for loosening or squeezing the fixed metal parts.

[0010] The limiting part 2 includes a movable sleeve and a movable end cap fixed to the opening end of the movable sleeve. The movable sleeve has two layers of movable metal parts for clamping the wire. The outer sides of the two layers of movable metal parts are provided with a control part 2 for loosening or squeezing the movable metal parts.

[0011] When the second limiting part slides and fits with the first limiting part, the first control part loosens, the second control part is pressed against the moving metal part, the second limiting part slides and fits against the inner frame, the first control part is pressed against the fixed metal part, and the second control part loosens.

[0012] Furthermore, the outer surfaces of the fixed metal part and the moving metal part are respectively clearance-fitted with the inner walls of the fixed sleeve and the moving sleeve, respectively. The two end faces of the fixed metal part are respectively in contact with the inner wall of the fixed sleeve and the inner wall of the fixed end cover, respectively. The two end faces of the moving metal part are respectively in contact with the inner wall of the moving sleeve and the inner wall of the moving end cover.

[0013] Furthermore, both ends of the fixed metal part are provided with horizontally set grooves, and the inner wall of the fixed sleeve and the inner wall of the fixed end cover are integrally provided with fixed plates that are engaged in the grooves.

[0014] Both ends of the moving metal part are provided with horizontally arranged moving grooves, and the inner wall of the moving sleeve and the inner wall of the moving end cover are integrally provided with moving plates that are engaged in the moving grooves.

[0015] Furthermore, the fixed sleeve has fixed shafts extending outward and fixed in the sliding opening on both sides of the outer arc surface, and the driving component is fixed outside one of the fixed shafts. The moving sleeve has moving shafts extending outward and sliding in the sliding opening on both sides of the outer arc surface, and the output end of the driving component is fixed to one of the moving shafts. The driving component is a cylinder or a hydraulic cylinder.

[0016] Furthermore, both layers of fixed metal parts have fixed cavities with inclined inner walls on their outer sides. The control part includes a push rod, a limiting ring fixedly sleeved on the push rod, and a limiting plate fixed to one end of the push rod.

[0017] A push rod groove is passed through the moving shaft for the push rod to pass through. The inner wall of the push rod groove fits against the outer wall of the push rod, and the limiting ring and the limiting plate are located on both sides of the push rod groove. The sliding of the moving shaft is used to control the movement of the control unit.

[0018] The other end of the push rod has an integrally formed horizontal end and a locking end. The locking end extends from the outside of the fixed end cover into the fixed cavity and engages with the fixed cavity.

[0019] Furthermore, on one side of each of the two fixed metal parts, there are two clamping surfaces and one clamping surface for the wire to pass through. The two clamping surfaces are located on both sides of the clamping surface. The diameter of the clamping surface is larger than that of the clamping surface. The clamping surface is used to clamp the wire.

[0020] Both the upper and lower ends of the fixed sleeve have ventilation ends, which are connected to the interior of the clamping surface.

[0021] Furthermore, both layers of moving metal parts have moving cavities on their outer sides. The moving cavities penetrate the moving metal parts and are divided into two connected parts. One inner wall is inclined, and the other inner wall extends in a straight line. The inclined part extends from the first limiting part towards the second limiting part, and the width gradually narrows.

[0022] The second control unit includes a push rod embedded in the moving cavity. The push rod has a plate end one and a plate end two at its two ends. The total length of the push rod, plate end one and plate end two is greater than the thickness of the moving metal part. The inner side of the push rod has an integral inclined surface that cooperates with the inclined part of the moving cavity.

[0023] When the limiting part 2 moves, plate end 1 and plate end 2 are respectively used to press against the fixed sleeve and the inner wall of the inner frame, and when pressing, plate end 1 and plate end 2 can be flush with the end face of the moving sleeve and the moving end cover, respectively.

[0024] Furthermore, the two moving metal parts are provided with clamping surfaces three on their adjacent surfaces, and the clamping surfaces three on both sides are close to each other to clamp the wire.

[0025] A transfer process applied to screw cold heading equipment includes the following steps:

[0026] Step 1: The large coil of material is first uncoiled by an uncoiler, and then straightened by a straightener to remove the bending and twisting of the wire, making it into a straight wire.

[0027] Step 2: The straightened wire passes through limiting part one and limiting part two. The length error of the wire fed into the mold area each time is controlled within ±0.1mm.

[0028] Step 3: By extending and retracting the drive component, control the second limiting part to slide along the inner frame. When the second limiting part slides to fit with the first limiting part, it clamps the wire. At the same time, the first limiting part is in a released state. When the second limiting part slides to fit with the inner frame, it releases the wire. At the same time, the first limiting part is in a clamping state.

[0029] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0030] 1. The wire is clamped by surface contact of the fixed and moving metal parts in two sets of limiting parts one and two. Compared with the line contact of the traditional feeding wheel, the contact area is significantly increased and the clamping pressure is dispersed. Even in the presence of metal debris, it can greatly avoid indentation or damage to the wire surface.

[0031] 2. Intermittent clamping is adopted. When one set is released, the other set is clamped and fixed to complete one feeding stroke. Then the action is switched. One set is fixed and the other set is released and returns along the previously fed wire. This is repeated, which eliminates the slippage problem caused by insufficient pressure of traditional feeding wheels. The feeding length is precisely determined by the mechanical stroke of the drive component, and it will not produce a progressively amplified cumulative error like traditional feeding wheel slippage.

[0032] 3. Only one drive component is needed to drive the second limiting part to perform a simple linear reciprocating motion. The application and release of clamping force are achieved through the mechanical linkage of the first limiting part and the second limiting part. The mechanism structure is relatively simple and reliable. Only the extension and retraction of a single cylinder or oil cylinder needs to be controlled, eliminating the need for the complex control system for the pressure of multiple sets of feeding wheels in the traditional method.

[0033] 4. The airflow channel formed by the clamping surface of the limiting part one and the air exchange end introduces gas through the air exchange end. The directional airflow is formed by the space limitation of the channel, which can effectively blow away metal debris and oil stains attached to the surface of the wire, and prevent these contaminants from being squeezed into the surface of the wire and forming defects during subsequent clamping operations, or from being carried into the frame. Attached Figure Description

[0034] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0035] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 This is an exploded structural diagram of the inner frame and the rack of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of the limiting part one and the limiting part two within the inner frame of the present invention;

[0038] Figure 4 This is a top view schematic diagram of the limiting part one and limiting part two of the present invention;

[0039] Figure 5 This is a half-sectional structural diagram of the fixed sleeve and fixed end cap of the present invention;

[0040] Figure 6 This is a partially exploded structural diagram of the limiting part of the present invention;

[0041] Figure 7 This is a half-sectional structural diagram of the movable sleeve and movable end cap of the present invention;

[0042] Figure 8 This is a partially exploded structural diagram of the limiting part two of the present invention;

[0043] Figure 9 This is a schematic diagram of the mutual principle structure of limiting part one and limiting part two of the present invention;

[0044] Figure 10 This is a schematic diagram of the structure of the limiting part one and the limiting part two of the present invention being close to each other.

[0045] In the diagram: 1. Frame; 11. Frame opening; 2. Inner frame; 21. Slide opening; 3. Drive unit; 4. Limiting part one; 41. Fixed sleeve; 411. Fixed plate; 42. Fixed end cover; 43. Ventilation end; 44. Fixed shaft; 45. Fixed metal part; 451. Fixed groove; 452. Fixed cavity; 453. Clamping surface one; 454. Clamping surface two; 46. Control part one; 461. Push rod; 462. Limiting part 463. Ring; 464. Limiting plate; 465. Horizontal end; 4666. Locking end; 5. Limiting part two; 51. Moving sleeve; 511. Moving plate; 52. Moving end cover; 53. Moving shaft; 54. Push rod groove; 55. Moving metal part; 551. Moving groove; 552. Moving cavity; 553. Clamping surface three; 56. Control part two; 561. Push rod; 562. Plate end one; 563. Plate end two; 564. Inclined surface. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1:

[0048] Please see Figures 1-10 The present invention provides a technical solution: a transmission mechanism applied to screw cold heading equipment, such as... Figures 1-4 As shown, it includes a frame 1, which has a frame opening 11. An inner frame 2 is installed inside the frame opening 11. The inner frame 2 has two sets of horizontally arranged limiting parts 1 4 and limiting parts 2 5. One set of limiting parts 1 4 and limiting parts 2 5 is fixed, and the other set is sliding. A drive component 3 for controlling the sliding of limiting parts 2 5 is provided on the outside of limiting parts 1 4.

[0049] Both the first limiting part 4 and the second limiting part 5 are used to clamp the wire. When one set clamps, the other set is released, and the two sets alternate.

[0050] Specifically, the fixed limiting part 4 and the moving limiting part 5 are arranged such that one group fixes the wire at intervals and the other group pulls the wire at intervals. The fixed and pulling periods are set at intervals to ensure that the wire moves into the frame 1 in segments. The driving component 3 is a cylinder or hydraulic cylinder, which drives the wire to move segment by segment by extension and retraction. The structure is simple.

[0051] like Figures 3-8 As shown, sliding openings 21 are provided on both sides of the inner frame 2;

[0052] The limiting part 4 includes a fixed sleeve 41 and a fixed end cap 42 fixed to the opening end of the fixed sleeve 41. The fixed sleeve 41 has two layers of fixed metal parts 45 for clamping the wire. The outer sides of the two layers of fixed metal parts 45 are provided with a control part 46 for loosening or squeezing the fixed metal parts 45.

[0053] The limiting part 2 5 includes a movable sleeve 51 and a movable end cap 52 fixed to the opening end of the movable sleeve 51. The movable sleeve 51 has two layers of movable metal parts 55 for clamping the wire. The outer sides of the two layers of movable metal parts 55 are provided with a control part 2 56 for loosening or squeezing the movable metal parts 55.

[0054] When the second limiting part 5 slides and fits with the first limiting part 4, the first control part 46 loosens, the second control part 56 is pressed against the moving metal part 55, the second limiting part 5 slides and fits against the inner frame 2, the first control part 46 is pressed against the fixed metal part 45, and the second control part 56 loosens.

[0055] Specifically, the limiting part 4 includes a fixed sleeve 41 and a fixed end cap 42. The fixed sleeve 41 has two layers of fixed metal parts 45 for clamping the wire. The two layers of fixed metal parts 45 have a control part 46 on the outside. The control part 46 is linked with the limiting part 5. The movement of the limiting part 5 controls the degree of compression of the two layers of fixed metal parts 45 by the control part 46. The limiting part 2 5 includes a movable sleeve 51 and a movable end cap 52. Two layers of movable metal parts 55 are disposed inside the movable sleeve 51. The limiting part 2 5 is driven to move by the driving component 3. The two layers of movable metal parts 55 have control parts 2 56 on both sides. When the limiting part 2 5 moves, its two ends are squeezed respectively. The degree of squeezing of the two layers of movable metal parts 55 by the control part 2 56 is controlled by the squeezing action, so that the structure is interlocked. It is controlled only by the telescopic driving component 3. In addition, it should be noted that by clamping the wire with two layers of fixed metal parts 45 and two layers of movable metal parts 55, the contact area with the wire can be large. Compared with the structure of the feeding wheel, the feeding wheel only contacts the wire, which can better avoid damaging the wire.

[0056] like Figures 5-8As shown, the outer surfaces of the fixed metal part 45 and the moving metal part 55 are respectively clearance-fitted with the inner walls of the fixed sleeve 41 and the moving sleeve 51. The two end faces of the fixed metal part 45 are respectively in contact with the inner wall of the fixed sleeve 41 and the inner wall of the fixed end cover 42. The two end faces of the moving metal part 55 are respectively in contact with the inner wall of the moving sleeve 51 and the inner wall of the moving end cover 52.

[0057] Specifically, the fixed metal part 45 and the moving metal part 55 can move to a certain extent within the fixed sleeve 41 and the moving sleeve 51, respectively, and are limited along the axial direction of the fixed sleeve 41 and the moving sleeve 51, so that the fixed metal part 45 and the moving metal part 55 can only move along the radial direction of the fixed sleeve 41 and the moving sleeve 51, respectively, to control the loosening and clamping of the wire and complete the quantitative transmission of the wire.

[0058] like Figures 5-8 As shown, both ends of the fixed metal part 45 are provided with horizontally arranged fixed grooves 451, and the inner wall of the fixed sleeve 41 and the inner wall of the fixed end cover 42 are integrally provided with fixed plates 411 that are engaged in the fixed grooves 451.

[0059] Both ends of the moving metal part 55 are provided with horizontally arranged moving grooves 551, and the inner wall of the moving sleeve 51 and the inner wall of the moving end cover 52 are integrally provided with moving plates 511 that are engaged in the moving grooves 551.

[0060] The fixed groove 451 on the horizontal fixed metal part 45, the fixed plate 411 on the inner wall of the fixed sleeve 41 and the fixed plate 411 on the inner wall of the fixed end cover 42 are all used to limit the two layers of fixed metal parts 45 so that they can only move laterally, so that the two layers of fixed metal parts 45 can move closer or further away from each other. Similarly, the moving groove 551 on the moving metal part 55, the moving plate 511 on the inner wall of the moving sleeve 51 and the moving plate 511 on the inner wall of the moving end cover 52 also achieve the function of limiting the moving metal part 55 so that it can only move laterally, so that the two layers of moving metal parts 55 can move closer or further away from each other.

[0061] like Figure 3 and Figure 4 As shown, the fixed sleeve 41 has fixed shafts 44 extending outward and fixed in the sliding opening 21 on both sides of the outer arc surface. The driving component 3 is fixed outside one side of the fixed shaft 44. The movable sleeve 51 has movable shafts 53 extending outward and sliding in the sliding opening 21 on both sides of the outer arc surface. The output end of the driving component 3 is fixed to one of the movable shafts 53. The driving component 3 is a cylinder or a hydraulic cylinder.

[0062] Specifically, the drive component 3 is a cylinder or a hydraulic cylinder, and is installed outside the fixed shaft 44. Its output end passes through the fixed shaft 44 and is fixed to the moving shaft 53. The movement of the moving shaft 53 is controlled by the extension and retraction movement of the drive component 3, that is, the reciprocating movement of the limit part 2 5 is controlled.

[0063] like Figure 5 and Figure 6As shown, both outer sides of the two fixed metal parts 45 are provided with fixed cavities 452 with inclined inner walls. The control part 46 includes a push rod 461, a limiting ring 462 fixedly sleeved on the push rod 461, and a limiting plate 463 fixed to one end of the push rod 461.

[0064] A push rod groove 54 is passed through the moving shaft 53 for the push rod 461 to pass through. The inner wall of the push rod groove 54 fits against the outer wall of the push rod 461, and the limiting ring 462 and the limiting plate 463 are located on both sides of the push rod groove 54. The sliding of the moving shaft 53 is used to control the movement of the control unit 46.

[0065] The other end of the push rod 461 has an integrally formed horizontal end 464 and a locking end 465. The locking end 465 extends from the outside of the fixed end cover 42 into the fixed cavity 452 and cooperates with the fixed cavity 452.

[0066] Specifically, the shape of the control unit 46 is as follows: Figure 6 As shown, the wire extends straight with a hook-shaped structure at the end. It also has a limiting ring 462 and a limiting plate 463 on its outer side. These are used to push the passive shaft 53 to both sides, allowing the control unit 46 to control whether it is pressed against the two layers of fixed metal parts 45. The movement state of the limiting unit 45 controls the clamping state of the limiting unit 4, causing the limiting unit 4 to cooperate with the movement of the limiting unit 5. It should be noted that whether the two layers of fixed metal parts 45 clamp the wire depends on the degree of fit between the clamping end 465 and the fixed cavity 452.

[0067] like Figure 6 As shown, each of the two fixed metal parts 45 has two clamping surfaces 453 and one clamping surface 454 on one side opposite to each other for the wire to pass through. The two clamping surfaces 453 are located on both sides of the clamping surface 454. The diameter of the clamping surface 454 is larger than the diameter of the clamping surface 453. The clamping surface 453 is used to clamp the wire.

[0068] The fixed sleeve 41 has ventilation ends 43 at both the upper and lower ends, and the ventilation ends 43 are connected to the inside of the clamping surface 454.

[0069] Specifically, each of the two layers of fixed metal parts 45 has a clamping surface 1 453 and a clamping surface 2 454 on one side. The clamping surface 1 453 is used to clamp the wire, and the clamping surface 2 454 is used to partially cover the wire. The ventilation ends 43 at the upper and lower ends of the fixed sleeve 41 are used to generate unidirectional airflow. One end is connected to the air pump through a pipe. When the gas moves into the clamping surface 2 454, due to the limited space, it moves downward from the ventilation end 43 at the lower end. The gas will be located in the clamping surface 2 454 to flush away impurities on the wire. It should be noted that under the action of the limiting part 2 5 pulling the wire, the two layers of fixed metal parts 45 no longer clamp. Therefore, the impurities on the wire are separated under the action of the gas, and the impurities are prevented from being squeezed by the limiting part 2 5, so as to avoid the wire from being indented as much as possible.

[0070] like Figure 7 and Figure 8 As shown, both layers of moving metal parts 55 have moving cavities 552 on their outer sides. The moving cavities 552 penetrate the moving metal parts 55 and are divided into two connected parts. One inner wall is inclined and the other inner wall is straight. The inclined part extends from the limiting part 1 4 toward the limiting part 2 5 and the width gradually narrows.

[0071] Control unit 2 56 includes a push rod 561 embedded in the moving cavity 552. The push rod 561 has a plate end 1 562 and a plate end 2 563 at both ends. The total length of the push rod 561, plate end 1 562 and plate end 2 563 is greater than the thickness of the moving metal part 55. The inner side of the push rod 561 has an integral inclined surface 564 that cooperates with the inclined part of the moving cavity 552.

[0072] When the limiting part 2 5 moves, plate end 1 562 and plate end 2 563 are respectively used to press against the fixed sleeve 41 and the inner wall of the inner frame 2, and when pressing, plate end 1 562 and plate end 2 563 can be flush with the end face of the moving sleeve 51 and the moving end cover 52 respectively.

[0073] Specifically, the moving cavity 552 on the outer side of the two moving metal parts 55 and the control part 2 56 inside it are used to control the squeezing action between the two moving metal parts 55. When the plate end 1 562 and plate end 2 563 of the control part 2 56 are flush with the end faces of the moving sleeve 51 and the moving end cover 52 respectively, the two moving metal parts 55 are controlled to loosen and squeeze. It should be noted that when the plate end 1 562 is flush with the end face of the moving sleeve 51, it is actually the inclined surface 564 squeezing between the moving cavity 552, and the two moving metal parts 55 squeeze and clamp the wire in the middle.

[0074] like Figure 8 As shown, both moving metal parts 55 have clamping surfaces 553 on their adjacent surfaces. The clamping surfaces 553 on both sides are close to each other to clamp the wire. The clamping surfaces 553 are arc-shaped to cover the wire as much as possible during the clamping process. The two moving metal parts 55 are close to each other, but they do not contact each other, so that the clamping surfaces 553 can ensure that the wire is clamped. It should be noted that the diameter of the wire is the same as the diameter of the clamping surfaces 553 to increase the fit.

[0075] Example 2:

[0076] A transfer process applied to screw cold heading equipment includes the following steps:

[0077] Step 1: The large coil of material is first uncoiled by an uncoiler, and then straightened by a straightener to remove the bending and twisting of the wire, making it into a straight wire. The straight wire is the material used for cold heading of screws.

[0078] Step 2: The straightened wire passes through the limiting part 4 and the limiting part 5. The length error of the wire fed into the mold area each time is controlled within ±0.1mm. The wire is intermittently clamped by the limiting part 4 and the limiting part 5.

[0079] Step 3: By extending and retracting the drive component 3, the second limiting part 5 is controlled to slide along the inner frame 2. When it slides to the point where it is in contact with the first limiting part 4, it clamps the wire. At the same time, the first limiting part 4 is in a released state. When the second limiting part 5 slides to the point where it is in contact with the inner frame 2, it releases the wire. At the same time, the first limiting part 4 is in a clamping state. Under the extension and retraction of the cylinder or hydraulic cylinder, the second limiting part 5 is controlled to slide along the inner frame 2, so that the first limiting part 4 and the second limiting part 5 intermittently clamp the wire, driving the wire to move intermittently.

[0080] The working principle of this invention is as follows: Figures 2-4 As shown, the inner frame 2 has a fixed limiting part 4 and a limiting part 5 driven by a driving component 3. The limiting part 5 moves along the sliding opening 21 towards or away from the limiting part 4 via the driving component 3. When the limiting part 5 is pressed against the limiting part 4, it clamps the wire; when it moves away from the inner frame 2, it loosens the wire and pulls it. At the same time, when the limiting part 5 is pressed against the limiting part 4, the limiting part 4 is also subjected to force, loosening the wire. When the limiting part 5 is pressed against the inner frame 2, the limiting part 4 is subjected to a reverse force, clamping the wire, allowing the wire to extend continuously and in stages into the inner frame 2. The specific working process is as follows:

[0081] like Figure 5 and Figure 6 As shown, this is the limiting part 4, as... Figure 7 and Figure 8As shown, the second limiting part 5 moves from the state of being squeezed against the inner frame 2 toward the first limiting part 4. The second plate end 563 is flush with the moving end cover 52, that is, there is a gap between the inclined surface 564 and the moving cavity 552. The two moving metal parts 55 are in a loose state, and the wire can slide freely within the two moving metal parts 55. At the same time, the moving shaft 53 first pushes the limiting plate 463, causing the first control part 46 to move along the direction of the second limiting part 5, so that the clamping end 465 is squeezed against the fixed cavity 452. Based on this, the two fixed metal parts 45 squeeze and clamp the wire, ensuring that the wire is fixed during the movement of the second limiting part 5. Afterwards, when the second limiting part 5 moves to abut against the first limiting part 4, the first plate end 562 is pressed against the fixed sleeve 41, and the first plate end 562 is flush with the moving sleeve 51. Based on this, the two moving metal parts 55 clamp the wire under the action of the second controlling part 56. At the same time, the moving shaft 53 pushes the limiting ring 462, creating a gap between the clamping end 465 and the fixed cavity 452. The two fixed metal parts 45 loosen, allowing the wire to move along the two fixed metal parts 45. Then, the second limiting part 5 moves away from the first limiting part 4 and is pressed against the inner wall of the inner frame 2. During this process, the wire is stretched. After the second limiting part 5 is pressed against the inner frame 2, the above operation process is repeated to clamp and transmit wires of a specific diameter.

[0082] It should be noted that when control unit 1 46 and control unit 2 56 respectively extrude the two layers of fixed metal parts 45 and the two layers of moving metal parts 55, a process is required, such as... Figure 9 As shown, the second limiting part 5 moves away from the first limiting part 4, and the second limiting part 5 gradually loosens, while the first limiting part 4 gradually clamps it. During this process, the wire still moves towards the inside of the frame 1 to a certain extent, resulting in a certain deviation. Figure 10 As shown, the second limiting part 5 approaches the first limiting part 4, gradually clamping it while the first limiting part 4 gradually loosens. This movement causes the wire to be pushed outward to a certain extent, resulting in a certain deviation in outward movement. The deviations in outward and inward movement are offset to a certain extent, improving the accuracy of wire transmission. It should also be noted that "gradually loosening" and "gradually clamping" refer to the movement process of the first controlling part 46 and the second controlling part 56.

[0083] In addition, such as Figure 6 As shown, the inner side of the two fixed metal parts 45 has a clamping surface 454. The clamping surface 454 does not squeeze the wire. When the wire moves into the frame 1, its ventilation end 43 is connected to the air pump and generates downward gas, which can move downward from the clamping surface 454 to clean the dirt on the wire and avoid clamping the dirt as much as possible to avoid affecting the accuracy.

[0084] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0085] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A transmission mechanism for a screw cold heading machine, comprising a frame (1) having a frame opening (11), characterized in that, An inner frame (2) is installed inside the frame opening (11). The inner frame (2) has two sets of horizontally arranged limiting parts one (4) and limiting parts two (5). One set of limiting parts one (4) and limiting parts two (5) is fixed, and the other set is sliding. The outer side of the limiting part one (4) has a driving component (3) for controlling the sliding of the limiting part two (5). Both the first limiting part (4) and the second limiting part (5) are used to clamp the wire. When one set clamps, the other set is released, and the two sets alternate.

2. The transmission mechanism applied to screw cold heading equipment according to claim 1, characterized in that: Sliding openings (21) are provided on both sides of the inner frame (2); The limiting part (4) includes a fixed sleeve (41) and a fixed end cap (42) fixed to the opening end of the fixed sleeve (41). The fixed sleeve (41) has two layers of fixed metal parts (45) for clamping the wire. The outer sides of the two layers of fixed metal parts (45) are provided with a control part (46) for loosening or squeezing the fixed metal parts (45). The limiting part 2 (5) includes a movable sleeve (51) and a movable end cap (52) fixed to the opening end of the movable sleeve (51). The movable sleeve (51) has two layers of movable metal parts (55) for clamping the wire. The two layers of movable metal parts (55) are provided with a control part 2 (56) on the outside of each layer of movable metal parts (55) for loosening or squeezing the movable metal parts (55). When the second limiting part (5) slides and fits with the first limiting part (4), the first control part (46) loosens, the second control part (56) is pressed against the moving metal part (55), the second limiting part (5) slides and fits against the inner frame (2), the first control part (46) is pressed against the fixed metal part (45), and the second control part (56) loosens.

3. The transmission mechanism applied to screw cold heading equipment according to claim 2, characterized in that: The outer surfaces of the fixed metal part (45) and the moving metal part (55) are respectively clearance-fitted with the inner walls of the fixed sleeve (41) and the moving sleeve (51). The two end faces of the fixed metal part (45) are respectively in contact with the inner wall of the fixed sleeve (41) and the inner wall of the fixed end cap (42). The two end faces of the moving metal part (55) are respectively in contact with the inner wall of the moving sleeve (51) and the inner wall of the moving end cap (52).

4. The transmission mechanism applied to screw cold heading equipment according to claim 2, characterized in that: The fixed metal part (45) has horizontally set grooves (451) on both ends. The inner wall of the fixed sleeve (41) and the inner wall of the fixed end cover (42) are integrally formed with a fixed plate (411) that is locked into the groove (451). Both ends of the moving metal part (55) are provided with horizontally arranged moving grooves (551), and the inner wall of the moving sleeve (51) and the inner wall of the moving end cover (52) are integrally provided with moving plates (511) that are locked into the moving grooves (551).

5. The transmission mechanism applied to a screw cold heading equipment according to claim 2, characterized in that: The fixed sleeve (41) has fixed shafts (44) extending outward and fixed in the sliding opening (21) on both sides of the outer arc surface. The drive component (3) is fixed outside one side of the fixed shaft (44). The movable sleeve (51) has movable shafts (53) extending outward and sliding in the sliding opening (21) on both sides of the outer arc surface. The output end of the drive component (3) is fixed to one of the movable shafts (53). The drive component (3) is a cylinder or a hydraulic cylinder.

6. The transmission mechanism applied to a screw cold heading equipment according to claim 5, characterized in that: Both layers of fixed metal parts (45) have fixed cavities (452) with inclined inner walls on their outer sides. The control part (46) includes a push rod (461), a limiting ring (462) fixedly sleeved on the push rod (461), and a limiting plate (463) fixed to one end of the push rod (461). A push rod groove (54) for the push rod (461) to pass through is provided on the moving shaft (53). The inner wall of the push rod groove (54) is in contact with the outer wall of the push rod (461), and the limiting ring (462) and the limiting plate (463) are located on both sides of the push rod groove (54). The sliding of the moving shaft (53) is used to control the movement of the control unit (46). The other end of the push rod (461) has an integrally formed horizontal end (464) and a locking end (465), the locking end (465) extending from the outside of the fixed end cap (42) into the fixed cavity (452) and engaging with the fixed cavity (452).

7. The transmission mechanism applied to a screw cold heading equipment according to claim 2, characterized in that: Two clamping surfaces (453) and one clamping surface (454) are provided on opposite sides of the two fixed metal parts (45) for wire to pass through. The two clamping surfaces (453) are located on both sides of the clamping surface (454). The diameter of the clamping surface (454) is larger than the diameter of the clamping surface (453). The clamping surface (453) is used to clamp the wire. The upper and lower ends of the fixed sleeve (41) are equipped with ventilation ends (43), which are connected to the interior of the clamping surface (454).

8. The transmission mechanism applied to a screw cold heading equipment according to claim 2, characterized in that: Both layers of moving metal parts (55) have moving cavities (552) on their outer sides. The moving cavity (552) penetrates the moving metal part (55) and is divided into two connected parts. One inner wall is inclined and the other inner wall is straight. The inclined part extends from the first limiting part (4) towards the second limiting part (5) and the width gradually narrows. The second control unit (56) includes a push rod (561) embedded in the moving cavity (552). The push rod (561) has a plate end one (562) and a plate end two (563) at both ends. The total length of the push rod (561), plate end one (562) and plate end two (563) is greater than the thickness of the moving metal part (55). The inner side of the push rod (561) has an integral inclined surface (564) that cooperates with the inclined part of the moving cavity (552). When the limiting part 2 (5) moves, plate end 1 (562) and plate end 2 (563) are used to press against the inner wall of the fixed sleeve (41) and the inner frame (2), respectively. When pressing, plate end 1 (562) and plate end 2 (563) can be flush with the end face of the moving sleeve (51) and the moving end cover (52), respectively.

9. The transmission mechanism applied to a screw cold heading equipment according to claim 2, characterized in that: The two moving metal parts (55) are provided with clamping surfaces three (553) on their adjacent surfaces. The clamping surfaces three (553) on both sides are close to each other to clamp the wire.

10. A transmission process applied to a screw cold heading equipment, characterized in that: The transmission mechanism for cold heading equipment of screws as described in any one of claims 1-9 includes the following steps: Step 1: The large coil of material is first uncoiled by an uncoiler, and then straightened by a straightener to remove the bending and twisting of the wire, making it into a straight wire. Step 2: The straightened wire passes through the first limiting part (4) and the second limiting part (5), and the length error of the wire fed into the mold area each time is controlled within ±0.1mm; Step 3: By extending and retracting the drive component (3), control the second limiting part (5) to slide along the inner frame (2), and when it slides to the point where the first limiting part (4) is in contact, it clamps the wire. At the same time, the first limiting part (4) is in a loose state. When the second limiting part (5) slides to the point where it is in contact with the inner frame (2), it loosens the wire. At the same time, the first limiting part (4) is in a clamping state.

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