Shearing device for cold header with adjustable shearing position

Abstract

The utility model relates to the technical field of cold headers, and discloses a shearing device for a cold header with an adjustable shearing position, which comprises a frame, a cold heading die movably mounted in the frame, a conveying mechanism fixedly mounted on one side of the frame, a first crank movably mounted at the input end of the conveying mechanism, and a crankshaft movably mounted on the other side of the frame. A second crank is movably installed on the rack on one side of the crankshaft, a sliding groove is formed in the second crank, an adjusting lead screw and a sliding block are movably installed in the sliding groove, a connecting rod is movably connected between the second crank and the first crank, and a second fixing shaft is fixedly installed at the bottom of the adjusting lead screw. The adjusting lead screw and the sliding block are movably installed in the second crank, so that the installation height of one end of the connecting rod can be adjusted through the adjusting lead screw and the sliding block, the reciprocating swing amplitude of the first crank is controlled, the length of a steel wire conveyed by the conveying mechanism at a time can be adjusted, and the shearing position of the steel wire is adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading machines, in particular to a shearing device for cold heading machines with adjustable shearing positions. Background Art

[0002] Cold heading machine is an important stamping machine in mechanical manufacturing. It is specially used to utilize metal plastic forming at room temperature to mass produce nuts, bolts and other fasteners. It transmits power through pulleys and gears, realizes linear motion through crank connecting rods and slider mechanisms, and utilizes punches and concave dies to plastically deform or separate the blanks of the processed parts, thereby forming them into the desired shape.

[0003] Most of the existing cold heading machines have their components connected through a transmission mechanism. Therefore, when the active mechanism and the transmission mechanism drive the conveying mechanism to convey the steel wire into the equipment, the conveying process is consistent each time, so that the length of the steel wire cut off at a single time is also consistent. When the single conveying length of the steel wire needs to be adjusted, the position of the connecting rod between the active crank and the driven crank needs to be adjusted to adjust the push-pull distance of the active crank on the connecting rod. However, the existing adjustment method is mostly to directly disassemble the rotating shaft connecting the connecting rod and the active crank and adjust it to the bearing at other positions on the active crank, which makes the entire adjustment process cumbersome and cannot improve the adjustment accuracy. In addition, some methods use a slider and a screw rod to adjust the position of one end of the connecting rod on the active crank. However, this method is prone to cause the screw rod to rotate due to vibration and other reasons when the equipment is running, which is prone to cause the conveying length of the steel wire to change when the equipment is running, thereby causing the product to not meet the processing requirements. Utility Model Content

[0004] The utility model aims to provide a shearing device for a cold heading machine with adjustable shearing position, which solves the problem in the related art that the cold heading steel wire feeding and shearing length cannot be conveniently adjusted.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A shearing device for a cold heading machine with adjustable shearing position, including a frame. A cold heading die is movably installed inside the frame. A conveying mechanism is fixedly installed on one side of the frame. A first crank is movably installed at the input end of the conveying mechanism. A crankshaft is movably installed on the other side of the frame. A second crank is movably installed on the frame on one side of the crankshaft. A chute is formed inside the second crank. An adjusting screw rod and a slider are respectively movably installed inside the chute. A connecting rod is movably connected between the second crank and the first crank. A second fixed shaft is fixedly installed at the bottom of the adjusting screw rod. A hexagonal seat is fixedly installed at the bottom of the second fixed shaft. An adjusting mechanism is arranged at the bottom of the second crank. The adjusting mechanism includes a fixed gear ring and a movable gear ring. The fixed gear ring is fixedly installed at the bottom of the second crank. A limiting sleeve is fixedly installed at the bottom of the movable gear ring and is movably installed outside the hexagonal seat.

[0007] Optionally, a cam is fixedly installed on the crankshaft located outside the frame;

[0008] Based on this, by driving the cam to rotate through the crankshaft, the second crank can be driven to swing reciprocally.

[0009] Optionally, the second crank is pivotally connected to one side of the frame. An installation groove is formed at the bottom of the second crank. One side of the top of the second crank is in contact with the cam.

[0010] Optionally, the slider is slidably installed inside the chute and is threadedly connected to the adjusting screw rod. A first fixed shaft is fixedly installed on one side of the slider. One end of the connecting rod is pivotally connected to the first fixed shaft, and the other end is pivotally connected to one side of the first crank;

[0011] Based on this, through the reciprocating swing of the second crank and the connecting rod, the reciprocating motion of the first crank can be realized, thereby controlling the fixed-length conveying of the steel wire by the conveying mechanism.

[0012] Optionally, a plurality of counterbores are formed inside the fixed gear ring, and the fixed gear ring is fixedly installed inside the installation groove through screws passing through the counterbores.

[0013] Optionally, a third fixed shaft is fixedly installed at the bottom of the hexagonal seat, and a snap ring is clamped on the outside of the third fixed shaft.

[0014] Optionally, the transverse cross-section of the limiting sleeve is a regular hexagon. A plurality of connecting plates are fixedly connected between the movable gear ring and the limiting sleeve. The limiting sleeve is inserted and installed outside the hexagonal seat;

[0015] Based on this, by engaging the movable gear ring with the fixed gear ring, the axial movement of the movable gear ring can be restricted by the fixed gear ring. Thus, the axial movement of the adjusting screw rod is restricted through the cooperation of the movable gear ring with the connecting plate and the limiting sleeve, preventing the continuous deflection of the adjusting screw rod caused by the vibration during the operation of the equipment, which may affect the installation position of the slider and lead to changes in the reciprocating swing process of the connecting rod driving the first crank.

[0016] Optionally, a compression spring is sleeved on the third fixed shaft located between the circlip and the limiting sleeve;

[0017] Based on this, through the settings of the circlip and the compression spring, a force towards the fixed gear ring direction can be applied to the limiting sleeve and the movable gear ring.

[0018] The working principle and beneficial effects of the present utility model are as follows:

[0019] 1. In the present utility model, the adjusting screw rod and the slider are movably installed within the second crank. Thus, the installation height of one end of the connecting rod can be adjusted through the adjusting screw rod and the slider, and further, the reciprocating swing amplitude of the first crank can be controlled, thereby adjusting the length of the steel wire conveyed by the conveying mechanism each time and realizing the adjustment of the steel wire shearing position.

[0020] 2. In the present utility model, an adjusting mechanism is provided at the bottom of the second crank. The adjusting mechanism is composed of components such as a fixed gear ring and a movable gear ring. Through the mutual engagement of the fixed gear ring and the movable gear ring, the occurrence of minute and continuous deflection of the adjusting screw rod caused by equipment vibration can be prevented, thereby preventing the displacement of the slider from causing changes in the pushing and pulling amplitudes of the connecting rod on the second crank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above characteristics, technical features, advantages and their implementation manners of the present utility model will be further described below in a clear and understandable manner in conjunction with the drawings of the preferred embodiments.

[0022] Figure 1 is a schematic diagram of the main structure of the present utility model;

[0023] Figure 2 is Figure 1 an enlarged view of part A in

[0024] Figure 3 is a schematic diagram of the second crank structure of the present utility model;

[0025] Figure 4 is a schematic diagram of the movable gear ring and the limiting sleeve structure of the present utility model;

[0026] Figure 5 is a schematic diagram of the split structure of the adjusting mechanism of the present utility model.

[0027] In the figure: 1. Frame; 2. Cold heading die; 3. Conveyor mechanism; 4. First crank; 5. Crankshaft; 6. Cam; 7. Second crank; 8. Adjusting lead screw; 9. Slide block; 10. Connecting rod; 11. Adjusting mechanism; 12. Fixed gear ring; 13. Movable gear ring; 14. Limiting sleeve; 15. Chute; 16. First fixed shaft; 17. Installation groove; 18. Counterbore; 19. Second fixed shaft; 20. Hexagonal seat; 21. Third fixed shaft; 22. Snap ring; 23. Connecting plate; 24. Compression spring. Detailed implementation mode

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation modes of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other implementation modes can also be obtained.

[0029] To make the drawings concise, only the parts related to the utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, parts with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0030] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0032] Embodiment 1:

[0033] As Figures 1 - 5As shown in the figure, this is the first embodiment of the present utility model, which proposes a shearing device for a cold heading machine with adjustable shearing position, including a frame 1. A cold heading die 2 is movably installed in the frame 1. A conveying mechanism 3 is fixedly installed on one side of the frame 1. A first crank 4 is movably installed at the input end of the conveying mechanism 3. A crankshaft 5 is movably installed on the other side of the frame 1. A second crank 7 is movably installed on the frame 1 on one side of the crankshaft 5. A chute 15 is formed in the second crank 7. An adjusting screw rod 8 and a slider 9 are respectively movably installed in the chute 15. A connecting rod 10 is movably connected between the second crank 7 and the first crank 4. A second fixed shaft 19 is fixedly installed at the bottom of the adjusting screw rod 8. A hexagonal seat 20 is fixedly installed at the bottom of the second fixed shaft 19. An adjusting mechanism 11 is arranged at the bottom of the second crank 7. The adjusting mechanism 11 includes a fixed gear ring 12 and a movable gear ring 13. The fixed gear ring 12 is fixedly installed at the bottom of the second crank 7. A limiting sleeve 14 is fixedly installed at the bottom of the movable gear ring 13 and is movably installed outside the hexagonal seat 20.

[0034] A cam 6 is fixedly installed on the crankshaft 5 located outside the frame 1. Based on this, by driving the cam 6 to rotate through the crankshaft 5, the second crank 7 can be driven to swing reciprocally. The second crank 7 is pivotally connected to one side of the frame 1. An installation groove 17 is formed at the bottom of the second crank 7. One side of the top of the second crank 7 is in contact with the cam 6. The slider 9 is slidably installed in the chute 15 and is threadedly connected to the adjusting screw rod 8. A first fixed shaft 16 is fixedly installed on one side of the slider 9. One end of the connecting rod 10 is pivotally connected to the first fixed shaft 16, and the other end is pivotally connected to one side of the first crank 4. Based on this, through the reciprocating swing of the second crank 7 and the matching of the connecting rod 10, the reciprocating motion of the first crank 4 can be realized, thereby controlling the fixed-length conveying of the steel wire by the conveying mechanism 3.

[0035] Embodiment 2:

[0036] Refer to Figures 3 - 5, which is the second embodiment of the present utility model. The difference between this embodiment and the first embodiment is that: a plurality of counterbores 18 are formed in the fixed gear ring 12, and the fixed gear ring 12 is fixedly installed in the installation groove 17 by screws passing through the counterbores 18. A third fixed shaft 21 is fixedly installed at the bottom of the hexagonal seat 20. A snap ring 22 is clamped on the outer side of the third fixed shaft 21. The transverse section of the limit sleeve 14 is a regular hexagon. A plurality of connecting plates 23 are fixedly connected between the movable gear ring 13 and the limit sleeve 14. The limit sleeve 14 is inserted and installed on the outer side of the hexagonal seat 20. Based on this, by engaging the movable gear ring 13 with the fixed gear ring 12, the axial movement of the movable gear ring 13 can be restricted by the fixed gear ring 12, so that the axial movement of the adjusting screw rod 8 is restricted through the cooperation of the movable gear ring 13, the connecting plates 23 and the limit sleeve 14, preventing the continuous deflection of the adjusting screw rod 8 caused by the vibration generated during the operation of the equipment, which may affect the installation position of the slider 9 and cause changes in the reciprocating swing process of the connecting rod 10 driving the first crank 4. A compression spring 24 is sleeved on the third fixed shaft 21 between the snap ring 22 and the limit sleeve 14. Based on this, through the settings of the snap ring 22 and the compression spring 24, a force towards the fixed gear ring 12 can be applied to the limit sleeve 14 and the movable gear ring 13.

[0037] It should be noted that the present utility model is a shearing device for a cold heading machine with adjustable shearing position. When it is necessary to adjust the length of the steel wire conveyed by the conveying mechanism 3 each time, an adjusting tool such as a wrench can be inserted between the three connecting plates 23 and manually pressed down. Then, the wrench presses down the limit sleeve 14. At the same time, the limit sleeve 14 compresses the compression spring 24 towards the snap ring 22. Thus, the limit sleeve 14 drives the movable gear ring 13 to move downward in cooperation with the three connecting plates 23, so that the top of the movable gear ring 13 is separated from the bottom of the fixed gear ring 12. Then, the three connecting plates 23 can be rotated by the wrench, and further, the three connecting plates 23 drive the second fixed shaft 19 and the adjusting screw rod 8 to rotate in cooperation with the hexagonal seat 20. Then, both ends of the adjusting screw rod 8 rotate in the bearings in the second crank 7 respectively, and the adjusting screw rod 8 also rotates in the threaded hole in the slider 9. Thus, the slider 9 moves upward or downward in the chute 15 through the forward and reverse rotation of the adjusting screw rod 8, so as to adjust the height of one end of the connecting rod 10 in cooperation with the first fixed shaft 16, and further adjust the pushing and pulling amplitude of the first crank 4 by adjusting the distance between one end of the connecting rod 10 and the rotation center of the second crank 7, so as to adjust the length of the steel wire conveyed by the conveying mechanism 3 each time, which can change the shearing position of the steel wire, and further realize cold heading processing of shearing steel wires of different lengths according to production requirements.

[0038] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A shearing device for a cold heading machine with adjustable shearing position, characterized in that: It includes a frame (1), a cold heading die (2) is movably installed inside the frame (1), a conveying mechanism (3) is fixedly installed on one side of the frame (1), a first crank (4) is movably installed at the input end of the conveying mechanism (3), a crankshaft (5) is movably installed on the other side of the frame (1), a second crank (7) is movably installed on the frame (1) on one side of the crankshaft (5), a chute (15) is formed inside the second crank (7), an adjusting screw rod (8) and a slider (9) are respectively movably installed inside the chute (15), and a connecting rod (10) is movably connected between the second crank (7) and the first crank (4). A second fixed shaft (19) is fixedly installed at the bottom of the adjusting screw rod (8), a hexagonal seat (20) is fixedly installed at the bottom of the second fixed shaft (19), an adjusting mechanism (11) is arranged at the bottom of the second crank (7), and the adjusting mechanism (11) includes a fixed gear ring (12) and a movable gear ring (13). The fixed gear ring (12) is fixedly installed at the bottom of the second crank (7), and a limiting sleeve (14) is fixedly installed at the bottom of the movable gear ring (13) and is movably installed outside the hexagonal seat (20).

2. The shearing device for a cold heading machine with adjustable shearing position according to claim 1, characterized in that: A cam (6) is fixedly installed on the crankshaft (5) located outside the frame (1).

3. The shearing device for a cold heading machine with adjustable shearing position according to claim 2, characterized in that: The second crank (7) is pivotally connected to one side of the frame (1), an installation groove (17) is formed at the bottom of the second crank (7), and one side of the top of the second crank (7) is in contact with the cam (6).

4. A shearing device for a cold heading machine with adjustable shearing position according to claim 1, characterized in that: The slider (9) is slidably installed inside the chute (15) and is threadedly connected to the adjusting screw rod (8). A first fixed shaft (16) is fixedly installed on one side of the slider (9). One end of the connecting rod (10) is pivotally connected to the first fixed shaft (16), and the other end is pivotally connected to one side of the first crank (4).

5. A shearing device for a cold heading machine with adjustable shearing position according to claim 4, characterized in that: A plurality of counterbores (18) are formed inside the fixed gear ring (12), and the fixed gear ring (12) is fixedly installed inside the installation groove (17) by screws passing through the counterbores (18).

6. The shearing device for a cold heading machine with adjustable shearing position according to claim 5, wherein: A third fixed shaft (21) is fixedly installed at the bottom of the hexagonal seat (20), and a circlip (22) is clamped outside the third fixed shaft (21).

7. A shearing device for a cold heading machine with adjustable shearing position according to claim 6, characterized in that: The transverse section of the limiting sleeve (14) is a regular hexagon. A plurality of connecting plates (23) are fixedly connected between the movable gear ring (13) and the limiting sleeve (14), and the limiting sleeve (14) is inserted and installed outside the hexagonal seat (20).

8. A shearing device for a cold heading machine with adjustable shearing position according to claim 7, characterized in that: A compression spring (24) is sleeved on the third fixed shaft (21) between the circlip (22) and the limiting sleeve (14).

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