Chain sleeve cold heading drilling device with buffer structure
By designing a cold heading drilling device for chain sleeves with a buffer structure, using an upper punch group, a lower punch group, and a drill rod, combined with a buffer mechanism, the problems of interface gaps and errors in chain sleeve processing are solved, achieving high-precision cold heading drilling results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NEW ZHAOEN (XIAMEN) MATERIAL TECH CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional chain sleeves are prone to gaps at the interface when processed from rolled materials, and can easily lead to large errors during cold heading.
A chain sleeve cold heading drilling device with a buffer structure was designed. It adopts an upper punch group, a lower punch group and a drill rod, combined with a buffer mechanism. It is made of solid material and uses the buffer spring of electric push rod and guide column for buffering to reduce machining errors.
The problem of interface gaps was solved, and the machining error of the cold heading drilling device was reduced, thus achieving high-precision cold heading drilling function.
Smart Images
Figure CN224143965U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chain processing technology, specifically to a cold heading drilling device for chain sleeves with a buffer structure. Background Technology
[0002] Pins and sleeves on conveyor chains typically require milling of the outer surface (commonly known as milling flat) and drilling after machining the outer diameter.
[0003] Traditional chain sleeves are made by joining rolled materials together. Gaps will appear at the joints during processing. Therefore, a drilling method was developed that uses molds and punches to cold-forge medium-carbon high-quality low-alloy steel.
[0004] During cold heading of the chain sleeve, the punch is pushed by an electric push rod. If the impact is too large, it can easily cause the punch to be over-impacted, resulting in a large error. Utility Model Content
[0005] The purpose of this invention is to provide a chain sleeve cold heading drilling device with a buffer structure to solve the problems mentioned in the background art, such as gaps appearing at the interface during coil processing and the potential for large errors.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a chain sleeve cold heading drilling device with a buffer structure, comprising a frame, a control key mounted on the surface of the frame, a module fixed on the surface of the frame, six sets of molds embedded in the surface of the module, mold cavities formed on the surface of the mold cavities, the central axis of the mold cavities coinciding with the central axis of the mold, an upper punch assembly disposed above the module, the upper punch assembly comprising a first upper punch, a second upper punch, a third upper punch, a fourth upper punch, and a drawing head, the module... A lower punch assembly is provided below, consisting of a first lower punch, a second lower punch, a third lower punch, a fourth lower punch, and a fifth lower punch. A drill rod is provided above the module, and the drill rod is made of metal. The central axis of the drill rod coincides with the central axis of the mold cavity. A drive mechanism is provided on the surface of the frame, and the drive mechanism contains an electric push rod, a guide frame, and a push plate. Buffer mechanisms are provided on both sides of the module, and the buffer mechanisms consist of buffer components and guide columns. A chain sleeve body is provided on one side of the module.
[0007] Preferably, a first upper punch is provided above the module, a second upper punch is provided on one side of the first upper punch, and a third upper punch is provided on one side of the second upper punch. The central axes of the third upper punch, the second upper punch, and the first upper punch coincide with the central axis of the mold cavity, and the diameter of the bottom of the third upper punch, the second upper punch, and the first upper punch is the same as the diameter of the upper part of the mold cavity.
[0008] Preferably, a fourth upper punch is provided on one side of the third upper punch, and a convex chamfer is formed on one end face of the fourth upper punch. The central axis of the fourth upper punch coincides with the central axis of the mold cavity, and the diameter of the fourth upper punch is the same as the diameter of the upper part of the mold cavity. A drawing head is provided on one side of the fourth upper punch, and a convex chamfer is formed on one end face of the drawing head. The central axis of the drawing head coincides with the central axis of the mold cavity.
[0009] Preferably, the first lower punch is disposed below the first upper punch, the second lower punch is disposed below the second upper punch, and a third lower punch is disposed on one side of the second lower punch. The central axes of the third lower punch, the second lower punch, and the first lower punch coincide with the central axis of the mold cavity, and the diameter of the top of the third lower punch, the second lower punch, and the first lower punch is the same as the diameter of the lower part of the mold cavity.
[0010] Preferably, the fourth lower punch is disposed below the fourth upper punch, and a convex chamfer is formed on one end face of the fourth lower punch. The central axis of the fourth lower punch coincides with the central axis of the mold cavity, and the diameter of the fourth lower punch is the same as the diameter of the lower part of the mold cavity. The fifth lower punch is disposed below the drawing head, and a convex chamfer is formed on one end face of the fifth lower punch. The diameter of the fifth lower punch is the same as the diameter of the drawing head.
[0011] Preferably, electric push rods are installed on both sides of the frame. The input end of the electric push rod is electrically connected to the output end of the control key. A push plate is fixed to one end of the electric push rod. The push plate is fixedly connected to one end of the upper punch group, the lower punch group and the drill rod respectively. Guide frames are fixed on both sides of the frame surface. The guide frames are sleeved on the outside of the upper punch group, the lower punch group and the drill rod.
[0012] Preferably, the guide posts are fixed at the corner positions of the push plate, and a buffer component is provided on one side of the guide post, which is fixed to the surface of the guide frame.
[0013] Preferably, the buffer component includes a guide cylinder, a buffer spring, and a buffer plate. A guide cylinder is provided on one side of the guide post. The guide cylinder and the guide post are interlocked and engaged. The surface of the guide cylinder is fixedly connected to the surface of the guide frame.
[0014] Preferably, a buffer plate is slidably disposed inside the guide cylinder, and a buffer spring is fixed between the buffer plate and the guide cylinder.
[0015] Preferably, the chain sleeve body has grooves formed on its upper and lower end faces after cold heading, and positioning holes are formed on its surface after being forged by a stretching head.
[0016] Compared with the prior art, the beneficial effects of this utility model are: the chain sleeve cold heading drilling device with buffer structure not only uses solid material processing, which solves the problem of interface gaps generated by traditional roll material processing, but also reduces the processing error when using the cold heading drilling device;
[0017] 1. By configuring an upper punch assembly, a drive mechanism, a lower punch assembly, and drill rods, and by providing upper and lower punch assemblies on both sides of the mold, during cold forging, solid steel is placed inside the mold cavity below the first upper punch. The electric push rods on one side of the first upper and lower punches are controlled by a control key. Under the action of the electric push rods, a push plate is pushed, causing the push plate to push the first upper and lower punches simultaneously, allowing the first upper and lower punches to cold forge the solid steel placed in the mold cavity. After forging, the steel is removed and placed in… The steel is cold-forged into a chain sleeve body by passing through the mold cavity between the second upper punch and the second lower punch via a drive mechanism. Then, the steel passes through the first upper punch, the first lower punch to the drawing head, and the fifth lower punch in sequence. The steel is then cold-forged into a chain sleeve body. The drilling rod at the rear of the drawing head drills the positioning holes on the surface of the chain sleeve body to realize the cold-forging drilling function of the cold-forging drilling device. Moreover, the solid material is used for processing, which solves the problem of interface gaps caused by traditional coil processing.
[0018] 2. With a buffer mechanism, when the push plate pushes the upper and lower punch groups to cold-forge solid steel, the push plate drives the guide column to move synchronously, so that the guide column is inserted into the guide cylinder. At this time, the guide column squeezes the buffer plate, which in turn squeezes the buffer spring, causing the buffer spring to contract and buffer the guide column. This avoids excessive pushing force from the push plate, which could cause large errors. This achieves the buffer pushing function of the cold forging drilling device on the upper and lower punch groups, reducing the processing error when using the cold forging drilling device. Attached Figure Description
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0020] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;
[0021] Figure 3 This is a schematic diagram of the cold heading drilling structure of this utility model;
[0022] Figure 4 This is a three-dimensional enlarged structural diagram of the chain sleeve body of this utility model.
[0023] In the diagram: 1. Frame; 11. Module; 12. Mold; 13. Mold cavity; 14. Control key; 2. Upper punch assembly; 21. First upper punch; 22. Second upper punch; 23. Third upper punch; 24. Fourth upper punch; 25. Drawing head; 3. Drive mechanism; 31. Electric push rod; 32. Guide frame; 33. Push plate; 4. Lower punch assembly; 41. First lower punch; 42. Second lower punch; 43. Third lower punch; 44. Fourth lower punch; 45. Fifth lower punch; 5. Drill rod; 6. Buffer mechanism; 61. Buffer component; 611. Guide cylinder; 612. Buffer spring; 613. Buffer plate; 62. Guide post; 7. Chain sleeve body; 71. Groove; 72. Positioning hole. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. 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 a direct connection or an indirect connection through an intermediate medium. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.
[0025] The present invention provides a chain sleeve cold heading drilling device with a buffer structure, the structure of which is as follows: Figure 1 and Figure 2 As shown, the device includes a frame 1, on the surface of which a control key 14 is mounted. The control key 14 can be of the LA series. A module 11 is fixed on the surface of the frame 1. Six sets of molds 12 are embedded on the surface of the module 11. Mold cavities 13 are opened on the surface of the molds 12. The central axis of the mold cavity 13 coincides with the central axis of the mold 12.
[0026] Furthermore, such as Figure 3As shown, an upper punch assembly 2 is provided above the module 11. The upper punch assembly 2 includes a first upper punch 21, a second upper punch 22, a third upper punch 23, a fourth upper punch 24, and a drawing head 25. The first upper punch 21 is provided above the module 11, the second upper punch 22 is provided on one side of the first upper punch 21, and the third upper punch 23 is provided on one side of the second upper punch 22. The central axis of the third upper punch 23, the second upper punch 22, and the first upper punch 21 coincides with the central axis of the mold cavity 13. The third upper punch 23, the second upper punch 22, and the fourth upper punch 24 are all connected. The diameters of the bottom of the punch 22 and the first upper punch 21 are the same as the diameter of the upper part of the mold cavity 13. A fourth upper punch 24 is provided on one side of the third upper punch 23. A convex chamfer is formed on one end face of the fourth upper punch 24. The central axis of the fourth upper punch 24 coincides with the central axis of the mold cavity 13. The diameter of the fourth upper punch 24 is the same as the diameter of the upper part of the mold cavity 13. A drawing head 25 is provided on one side of the fourth upper punch 24. A convex chamfer is formed on one end face of the drawing head 25. The central axis of the drawing head 25 coincides with the central axis of the mold cavity 13.
[0027] Furthermore, such as Figure 3 As shown, a lower punch assembly 4 is provided below module 11. The lower punch assembly 4 consists of a first lower punch 41, a second lower punch 42, a third lower punch 43, a fourth lower punch 44, and a fifth lower punch 45. The first lower punch 41 is located below the first upper punch 21, and the second lower punch 42 is located below the second upper punch 22. The third lower punch 43 is located on one side of the second lower punch 42. The central axis of the third lower punch 43, the second lower punch 42, and the first lower punch 41 coincides with the central axis of the mold cavity 13. The third lower punch 43, the second lower punch 42, and the first lower punch 41 are arranged below the first upper punch 22. The diameters of the tops of the rod 42 and the first lower punch 41 are the same as the diameter of the lower part of the mold cavity 13. The fourth lower punch 44 is located below the fourth upper punch 24. A convex chamfer is formed on one end face of the fourth lower punch 44. The central axis of the fourth lower punch 44 coincides with the central axis of the mold cavity 13. The diameter of the fourth lower punch 44 is the same as the diameter of the lower part of the mold cavity 13. The fifth lower punch 45 is located below the drawing head 25. A convex chamfer is formed on one end face of the fifth lower punch 45. The diameter of the fifth lower punch 45 is the same as the diameter of the drawing head 25.
[0028] Furthermore, such as Figure 2As shown, a drill rod 5 is provided above the module 11. The drill rod 5 is made of metal. The central axis of the drill rod 5 coincides with the central axis of the mold cavity 13. A drive mechanism 3 is provided on the surface of the frame 1. The drive mechanism 3 contains an electric push rod 31, a guide frame 32 and a push plate 33. Electric push rods 31 are installed on both sides of the frame 1. The electric push rod 31 can be of the TA series. The input end of the electric push rod 31 is electrically connected to the output end of the control key 14. A push plate 33 is fixed to one end of the electric push rod 31. The push plate 33 is fixedly connected to one end of the upper punch group 2, the lower punch group 4 and the drill rod 5 respectively. Guide frames 32 are fixed on both sides of the surface of the frame 1. The guide frames 32 are sleeved on the outside of the upper punch group 2, the lower punch group 4 and the drill rod 5.
[0029] In use, an upper punch assembly 2 and a lower punch assembly 4 are respectively provided on both sides of the mold 12. During cold forging, solid steel is placed inside the mold cavity 13 below the first upper punch 21. The electric push rod 31 on one side of the first upper punch 21 and the first lower punch 41 is controlled by the control key 14. Under the action of the electric push rod 31, the push plate 33 is pushed, which pushes the first upper punch 21 and the first lower punch 41, so that the first upper punch 21 and the first lower punch 41 simultaneously cold forge the solid steel placed in the mold cavity 13. Then, it is taken out and placed inside the mold cavity 13 between the second upper punch 22 and the second lower punch 42. The second upper punch 22 and the second lower punch 42 are driven by the drive mechanism 3 to continue forging it. Then, in the same way, it passes through the first upper punch 21, the first lower punch 41 to the drawing head 25 and the fifth lower punch 45 in sequence to cold-forge the steel into the chain sleeve body 7. Then, the drill rod 5 at the rear of the drawing head 25 drills the positioning hole 72 on the surface of the chain sleeve body 7 to realize the cold-forging drilling function of the cold-forging drilling device.
[0030] Furthermore, such as Figure 2 As shown, buffer mechanisms 6 are provided on both sides of module 11. The buffer mechanism 6 consists of a buffer component 61 and a guide post 62. The guide post 62 is fixed at the corner position of the push plate 33. A buffer component 61 is provided on one side of the guide post 62. The buffer component 61 is fixed to the surface of the guide frame 32. The buffer component 61 contains a guide cylinder 611, a buffer spring 612 and a buffer plate 613. A guide cylinder 611 is provided on one side of the guide post 62. The guide cylinder 611 and the guide post 62 are interlocked. The surface of the guide cylinder 611 is fixedly connected to the surface of the guide frame 32. A buffer plate 613 is slidably provided inside the guide cylinder 611. A buffer spring 612 is fixed between the buffer plate 613 and the guide cylinder 611.
[0031] In use, when the pusher plate 33 pushes the upper punch group 2 and the lower punch group 4 to cold forge solid steel, the pusher plate 33 drives the guide column 62 to move synchronously, so that the guide column 62 is inserted into the guide cylinder 611. At this time, the guide column 62 squeezes the buffer plate 613, so that the buffer plate 613 squeezes the buffer spring 612, so that the buffer spring 612 contracts and buffers the guide column 62, so as to avoid the pusher plate 33 having too much force and causing a large error, so as to realize the buffering and pushing function of the cold forging drilling device on the upper punch group 2 and the lower punch group 4.
[0032] Furthermore, such as Figure 4 As shown, a chain sleeve body 7 is provided on one side of the module 11. After cold heading, grooves 71 are formed on the upper and lower end faces of the chain sleeve body 7. After being forged by the stretching head 25, positioning holes 72 are formed on the surface of the chain sleeve body 7.
[0033] Working principle: In use, an upper punch group 2 and a lower punch group 4 are respectively set on both sides of the mold 12. During cold forging, the solid steel is placed inside the mold cavity 13 below the first upper punch 21. The electric push rod 31 on one side of the first upper punch 21 and the first lower punch 41 is controlled by the control key 14. Under the action of the electric push rod 31, the push plate 33 is pushed, which pushes the first upper punch 21 and the first lower punch 41. The first upper punch 21 and the first lower punch 41 simultaneously cold forge the solid steel placed in the mold cavity 13. After forging, it is taken out and placed in the second upper punch group. Inside the mold cavity 13 between the upper punch 22 and the lower punch 42, the steel is forged by the drive mechanism 3, which drives the upper punch 22 and the lower punch 42 to continue forging. Then, it passes through the first upper punch 21, the first lower punch 41 to the drawing head 25 and the fifth lower punch 45 in sequence to cold forge the steel into the chain sleeve body 7. Then, the drill rod 5 at the rear of the drawing head 25 drills the positioning hole 72 on the surface of the chain sleeve body 7 to realize the cold forging drilling function of the cold forging drilling device. Moreover, the solid material is used for processing, which solves the problem of interface gaps caused by traditional coil processing.
[0034] When the pusher plate 33 pushes the upper punch group 2 and the lower punch group 4 to cold-forge solid steel, the pusher plate 33 drives the guide column 62 to move synchronously, so that the guide column 62 is inserted into the guide cylinder 611. At this time, the guide column 62 squeezes the buffer plate 613, causing the buffer plate 613 to squeeze the buffer spring 612, causing the buffer spring 612 to contract and buffer the guide column 62, avoiding excessive pushing force from the pusher plate 33 and causing large errors. This realizes the buffer pushing function of the cold forging drilling device on the upper punch group 2 and the lower punch group 4, reduces the processing error when using the cold forging drilling device, and finally completes the use of the cold forging drilling device.
[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A chain bush cold heading drilling device with a buffering structure, comprising a rack (1), characterized in that: The frame (1) is equipped with control keys (14), and a module (11) is fixed to the surface of the frame (1). Six sets of molds (12) are embedded in the surface of the module (11). A mold cavity (13) is opened on the surface of the mold (12). The central axis of the mold cavity (13) coincides with the central axis of the mold (12). An upper punch group (2) is arranged above the module (11). The upper punch group (2) includes a first upper punch (21), a second upper punch (22), a third upper punch (23), a fourth upper punch (24), and a drawing head (25). A lower punch group (4) is arranged below the module (11). The lower punch group (4) consists of a first lower punch (41). The module (11) is composed of a second lower punch (42), a third lower punch (43), a fourth lower punch (44) and a fifth lower punch (45). A drill rod (5) is provided above the module (11). The drill rod (5) is made of metal. The central axis of the drill rod (5) coincides with the central axis of the mold cavity (13). A drive mechanism (3) is provided on the surface of the frame (1). The drive mechanism (3) contains an electric push rod (31), a guide frame (32) and a push plate (33). A buffer mechanism (6) is provided on both sides of the module (11). The buffer mechanism (6) is composed of a buffer component (61) and a guide column (62). A chain sleeve body (7) is provided on one side of the module (11).
2. A chain bush cold heading drilling apparatus having a buffer structure according to claim 1, characterized in that: A first upper punch (21) is provided above the module (11), a second upper punch (22) is provided on one side of the first upper punch (21), and a third upper punch (23) is provided on one side of the second upper punch (22). The central axis of the third upper punch (23), the second upper punch (22) and the first upper punch (21) coincides with the central axis of the mold cavity (13). The diameter of the bottom of the third upper punch (23), the second upper punch (22) and the first upper punch (21) is the same as the diameter of the upper part of the mold cavity (13).
3. A chain bush cold heading drilling apparatus having a buffer structure according to claim 2, characterized in that: A fourth upper punch (24) is provided on one side of the third upper punch (23). A chamfered head is formed on one end face of the fourth upper punch (24). The central axis of the fourth upper punch (24) coincides with the central axis of the mold cavity (13). The diameter of the fourth upper punch (24) is the same as the diameter of the upper part of the mold cavity (13). A stretching head (25) is provided on one side of the fourth upper punch (24). A chamfered head is formed on one end face of the stretching head (25). The central axis of the stretching head (25) coincides with the central axis of the mold cavity (13).
4. A chain bush cold heading drilling apparatus having a buffering structure according to claim 1, characterized in that: The first lower punch (41) is located below the first upper punch (21), the second lower punch (42) is located below the second upper punch (22), and a third lower punch (43) is provided on one side of the second lower punch (42). The central axis of the third lower punch (43), the second lower punch (42) and the first lower punch (41) coincides with the central axis of the mold cavity (13). The diameter of the top of the third lower punch (43), the second lower punch (42) and the first lower punch (41) is the same as the diameter of the lower part of the mold cavity (13).
5. A chain bush cold-upsetting drilling device having a buffer structure according to claim 4, characterized in that: The fourth lower punch (44) is located below the fourth upper punch (24). A chamfered head is formed on one end face of the fourth lower punch (44). The central axis of the fourth lower punch (44) coincides with the central axis of the mold cavity (13). The diameter of the fourth lower punch (44) is the same as the diameter of the lower part of the mold cavity (13). The fifth lower punch (45) is located below the stretching head (25). A chamfered head is formed on one end face of the fifth lower punch (45). The diameter of the fifth lower punch (45) is the same as the diameter of the stretching head (25).
6. A chain bush cold heading drilling apparatus having a buffering structure according to claim 1, characterized in that: Electric push rods (31) are installed on both sides of the frame (1). The input end of the electric push rod (31) is electrically connected to the output end of the control key (14). A push plate (33) is fixed to one end of the electric push rod (31). The push plate (33) is fixedly connected to one end of the upper punch group (2), the lower punch group (4) and the drill rod (5) respectively. Guide frames (32) are fixed on both sides of the surface of the frame (1). The guide frames (32) are sleeved on the outside of the upper punch group (2), the lower punch group (4) and the drill rod (5).
7. A chain bush cold heading drilling apparatus having a buffering structure according to claim 1, characterized in that: The guide posts (62) are fixed at the corner positions of the push plate (33). A buffer component (61) is provided on one side of the guide post (62), and the buffer component (61) is fixed on the surface of the guide frame (32).
8. A chain bush cold-upsetting drilling device having a buffer structure according to claim 7, characterized in that: The buffer component (61) contains a guide cylinder (611), a buffer spring (612) and a buffer plate (613). A guide cylinder (611) is provided on one side of the guide post (62). The guide cylinder (611) and the guide post (62) are interlocked. The surface of the guide cylinder (611) is fixedly connected to the surface of the guide frame (32).
9. A chain bush cold-upsetting drilling device having a buffer structure according to claim 8, characterized in that: A buffer plate (613) is slidably disposed inside the guide cylinder (611), and a buffer spring (612) is fixed between the buffer plate (613) and the guide cylinder (611).
10. A chain bush cold heading drilling apparatus having a cushioning structure according to claim 1, characterized in that: The chain sleeve body (7) has grooves (71) formed on its upper and lower end faces after cold heading, and positioning holes (72) are formed on its surface after being forged by the stretching head (25).