A cutting device for a hot header

Abstract

The utility model relates to a kind of cutting device for hot header, including rack, cutter bar, tool rest and semicircular knife, front guide sleeve and rear guide sleeve are fixedly arranged on the rack, the cutter bar is slidably matched on front guide sleeve and rear guide sleeve, the tool rest is fixed at the front end of cutter bar, the semicircular knife is fixed on tool rest, cutting drive mechanism for driving its forward sliding is connected in the middle of cutter bar, reset mechanism for driving its backward reset is equipped on the cutter bar, oil supply assembly is equipped at the rear end of cutter bar, the cutter bar has oil supply channel leading to the inner wall of front guide sleeve and rear guide sleeve, the structure can continuously deliver lubricating oil to the key friction area such as the inner wall of front guide sleeve and rear guide sleeve, realize on-line automatic lubrication, significantly reduce wear, prolong component life, improve operation reliability, reduce maintenance frequency.

Description

Technical Field

[0001] This utility model relates to the field of hot upsetting machine technology, and in particular to a cutting device for use in a hot upsetting machine. Background Technology

[0002] A hot upsetting machine is a processing equipment widely used in the production of metal products such as fasteners and standard parts. It is mainly used to heat and upset metal bars. In the hot upsetting process, the continuous metal bars first need to be cut to a predetermined length, so the cutting device is one of the key components of the hot upsetting machine.

[0003] Existing hot upsetting machine cutting devices mostly use pneumatic or mechanical drives to move the cutting tool back and forth to achieve the cutting operation. However, during long-term, high-frequency operation, the sliding contact parts of the cutting tool (such as the guide sleeve) and the transmission connection parts have significant friction, which easily leads to accelerated wear of parts, affecting cutting accuracy and equipment lifespan. In addition, traditional structures often lack an effective automatic lubrication system, requiring manual lubrication and maintenance during machine shutdown, which not only increases the operational burden but also reduces production efficiency. Therefore, this application makes improvements to address the above technical problems. Utility Model Content

[0004] This invention proposes a cutting device for use in a hot heading machine, which solves the above-mentioned problems existing in the use of the prior art.

[0005] The technical solution of this utility model is implemented as follows: A cutting device for a hot upsetting machine includes a frame, a cutter bar, a cutter holder, and a semi-circular cutter. A front guide sleeve and a rear guide sleeve are fixedly installed on the frame. The cutter bar is slidably fitted on the front guide sleeve and the rear guide sleeve. The cutter holder is fixed to the front end of the cutter bar. The semi-circular cutter is fixed on the cutter holder. A cutting drive mechanism for driving it to slide forward is connected to the middle of the cutter bar. A reset mechanism for driving it to reset backward is provided on the cutter bar. An oil supply assembly is provided at the rear end of the cutter bar. An oil supply channel is provided inside the cutter bar, leading to the inner walls of the front guide sleeve and the rear guide sleeve.

[0006] Preferably, the cutting drive mechanism includes a cam, a joint bearing seat, and a joint shaft. The joint bearing seat is rotatably connected to a rotating shaft mounted on the frame. The cam is rotatably mounted on the frame and is used to cooperate with the lower side of the joint bearing seat. The middle part of the cutter bar is integrally formed with a mounting base. The joint shaft is rotatably mounted in the mounting base. The joint shaft has a radially opened insertion hole. The upper end of the joint bearing seat is provided with a joint insert rod for slidingly inserting into the insertion hole.

[0007] Preferably, the lower end of the joint bearing is rotatably connected to a roller for abutting against the cam.

[0008] Preferably, the reset mechanism includes a spring sleeved on the tool bar, the rear end of the tool bar is integrally formed with an outwardly extending baffle, and the two ends of the spring abut against the baffle and the rear guide sleeve respectively.

[0009] Preferably, the rear end of the cutter bar has an oil cavity that communicates with the oil supply channel, and the rear end of the cutter bar is fixedly provided with a sealing seat for forming a seal for the oil cavity. The oil supply assembly includes an oil supply hose connected to the sealing seat and communicating with the oil cavity.

[0010] Preferably, the sealing seat has a hose cavity, the oil supply hose is connected to the inner end of the hose cavity, the oil supply hose located in the hose cavity is arranged in a spiral shape, and the sealing seat is provided with a support rod for passing through the center of the spirally arranged oil supply hose.

[0011] Preferably, the oil supply channel includes a first lubricating oil channel connecting the inner cavity of the oil to the inner wall of the rear guide sleeve, a second lubricating oil channel connecting the inner cavity of the oil to the outer wall of the joint shaft, and a third lubricating oil channel connecting the inner cavity of the oil to the inner wall of the front guide sleeve.

[0012] In summary, the beneficial effects of this utility model are as follows: 1. This utility model, through a basic structure including a frame, a cutter bar, a cutter holder, and a semi-circular cutter, and with a front guide sleeve and a rear guide sleeve mounted on the frame, allows the cutter bar to slide within it, ensuring the linearity and stability of its movement. The cutter holder is fixed to the front end of the cutter bar and carries the semi-circular cutter, achieving precise power transmission to complete the cutting action. Specifically, a cutting drive mechanism in the middle of the cutter bar drives its forward movement, and a reset mechanism at the rear enables automatic return, forming a stable reciprocating motion pattern. More importantly, an oil supply channel is provided inside the cutter bar and connected to the rear oil supply assembly, continuously delivering lubricating oil to key friction areas such as the inner walls of the front and rear guide sleeves, achieving online automatic lubrication, significantly reducing wear, extending component life, improving operational reliability, and reducing maintenance frequency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0015] In the diagram: 1. Frame; 2. Tool holder; 21. Mounting seat; 22. Baffle; 23. Oil cavity; 24. First lubrication channel; 25. Second lubrication channel; 26. Third lubrication channel; 31. Tool holder; 32. Semi-circular tool; 4. Spring; 5. Front guide sleeve; 6. Rear guide sleeve; 71. Cam; 72. Joint shaft seat; 73. Joint insertion rod; 74. Joint shaft; 75. Insertion hole; 76. Rotating shaft; 77. Roller; 8. Sealing seat; 81. Hose cavity; 82. Support rod; 9. Oil supply hose; 100. Semi-circular support seat. Detailed Implementation

[0016] The following will refer to the appendix in the embodiments of this utility model. Figure 1 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] Example: like Figure 1 As shown, this utility model discloses a cutting device for a hot forging machine, including a frame 1, a cutter bar 2, a cutter holder 31, and a semi-circular cutter 32. The frame 1 serves as the supporting foundation for the entire device, on which a front guide sleeve 5 and a rear guide sleeve 6 are fixedly installed. The two are arranged along the same axis, forming a guiding structure for the cutter bar 2. The cutter bar 2 slides and engages with the front guide sleeve 5 and the rear guide sleeve 6, while the cutter holder 31 is fixed to the front end of the cutter bar 2 by screws. The semi-circular cutter 32 is fixed to the cutter holder 31 by screws, and the cutting edge of the semi-circular cutter 32 is on its semi-circular arc surface. It should be noted that a semi-circular support seat 100 is fixedly and offset in front of the semi-circular cutter 32, and the material passes between the semi-circular cutter 32 and the semi-circular support seat 100. When the cutter bar 2 drives the semi-circular cutter 32 to move forward, a shearing action is formed between the semi-circular cutter 32 and the semi-circular support seat 100, realizing the precise cutting of continuously fed metal bars. The cutter bar 2 is connected to a cutting drive mechanism in the middle for driving it to slide forward, and a reset mechanism is provided on the cutter bar 2 for driving it to reset backward. An oil supply assembly is provided at the rear end of the cutter bar 2, and the cutter bar 2 has an oil supply channel that leads to the inner wall of the front guide sleeve 5 and the rear guide sleeve 6.

[0018] Specifically, the cutting drive mechanism includes a cam 71, a joint bearing 72, and a joint shaft 74. The joint bearing 72 is rotatably connected to a rotating shaft 76 mounted on the frame 1 at its center. The cam 71 is rotatably mounted on the frame 1 via bearings and is driven by a motor (not shown) fixed to the frame 1 via a synchronous belt or gear transmission, enabling it to rotate continuously around its own axis. A roller 77 is mounted at the lower end of the joint bearing 72, and this roller 77 rolls in contact with the outer contour surface of the cam 71. When the cam 71 rotates, its contour pushes the roller 77, thereby causing the joint bearing 72 to reciprocate around the rotating shaft 76. A mounting base 21 is integrally formed in the middle of the tool holder 2. The joint shaft 74 is rotatably disposed within the mounting base 21, and a radially opening 75 is provided within the joint shaft 74. The upper end of the joint bearing 72 is provided with a joint insert 73 for sliding insertion into the insertion hole 75. When the joint bearing 72 swings with the rotation of the cam 71, the joint insert 73 at its upper end pushes the joint shaft 74, thereby driving the cutter bar 2 to move forward against the elastic force of the reset mechanism, completing one cutting action.

[0019] The reset mechanism includes a spring 4 sleeved on the tool holder 2, and a baffle 22 extending radially outwardly integrally formed at the rear end of the tool holder 2. The two ends of the spring 4 abut against the baffle 22 and the rear guide sleeve 6, respectively. This continuously applies a rearward reset force when the tool holder 2 is not subjected to driving thrust, ensuring that the roller 77 remains pressed against the cam 71.

[0020] To achieve automatic lubrication of critical friction points, an oil cavity 23 communicating with an oil supply channel is provided at the rear end of the tool holder 2. A sealing seat 8 is welded and fixed at the rear end of the tool holder 2 to form a seal for the oil cavity 23. The oil supply assembly includes an oil supply hose 9 connected to the sealing seat 8 and communicating with the oil cavity 23. The outer end of the oil supply hose 9 is used to connect to an external oil pump and a lubricating oil tank. The sealing seat 8 has a hose cavity 81 inside, and the inner end of the oil supply hose 9 extends into the hose cavity 81 and communicates with the oil cavity 23. Specifically, the oil supply hose 9 extending into the hose cavity 81 is spirally coiled. This structure provides sufficient expansion and contraction allowance during the reciprocating motion of the tool holder 2, preventing the hose from breaking due to stretching or becoming blocked due to pressure. To further improve the stability of the hose, a support rod 82 fixed to the sealing seat 8 is provided at the center of the hose cavity 81. The spiral oil supply hose 9 is coiled around the support rod 82. The support rod 82 plays a limiting and supporting role, preventing the hose from twisting, collapsing or being damaged by friction during dynamic operation.

[0021] The oil supply channel specifically includes three branch oil circuits: the first lubricating oil channel 24 extends from the oil inner cavity 23 to the inner wall surface of the rear guide sleeve 6, and is used to continuously supply oil to the sliding mating surface between the tool holder 2 and the rear guide sleeve 6; the second lubricating oil channel 25 extends from the oil inner cavity 23 to the outer peripheral surface of the joint shaft 74, and is used to lubricate the rotating pair between the joint shaft 74 and the mounting seat 21; the third lubricating oil channel 26 extends from the oil inner cavity 23, bypasses the mounting seat 21 and then extends to the inner wall surface of the front guide sleeve 5, and is used to lubricate the sliding contact surface between the tool holder 2 and the front guide sleeve 5.

[0022] During actual operation, the motor starts and drives the cam 71 to rotate. The cam 71 pushes the joint shaft seat 72 to swing through the roller 77. The joint insert rod 73 drives the joint shaft 74 and the cutter bar 2 to move forward through the insert hole 75. The semi-circular cutter 32 moves forward accordingly and cooperates with the fixed semi-circular support to cut the metal bar. After cutting, the cam 71 rotates to its lowest point, and the cutter bar 2 returns to its starting position under the action of the spring 4. At the same time, the lubrication system can run at regular intervals. The oil pump delivers lubricating oil into the oil cavity 23 through the oil supply hose 9, and lubricates the front guide sleeve 5, the rear guide sleeve 6, and the joint shaft 74 through three lubrication oil channels, respectively, to achieve dynamic lubrication under all working conditions.

[0023] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cutting device for use in a hot heading machine, characterized in that: The device includes a frame, a cutter bar, a cutter holder, and a semi-circular cutter. A front guide sleeve and a rear guide sleeve are fixedly mounted on the frame. The cutter bar slides and engages with the front and rear guide sleeves. The cutter holder is fixed to the front end of the cutter bar. The semi-circular cutter is fixed to the cutter holder. A cutting drive mechanism for driving it to slide forward is connected to the middle of the cutter bar. A reset mechanism for driving it to reset backward is provided on the cutter bar. An oil supply assembly is provided at the rear end of the cutter bar. An oil supply channel is provided inside the cutter bar, leading to the inner walls of the front and rear guide sleeves.

2. A cutting device for a hot heading machine according to claim 1, characterized in that: The cutting drive mechanism includes a cam, a joint bearing seat, and a joint shaft. The joint bearing seat is rotatably connected to a rotating shaft mounted on the frame. The cam is rotatably mounted on the frame and is used to cooperate with the lower side of the joint bearing seat. The middle part of the cutter bar is integrally formed with a mounting base. The joint shaft is rotatably mounted in the mounting base. The joint shaft has a radially opened insertion hole. The upper end of the joint bearing seat is provided with a joint insert rod for slidingly inserting into the insertion hole.

3. A cutting device for a hot heading machine according to claim 2, characterized in that: The lower end of the joint bearing is rotatably connected to a roller for abutting against the cam.

4. A cutting device for a hot heading machine according to claim 1, characterized in that: The reset mechanism includes a spring sleeved on the tool bar, and the rear end of the tool bar is integrally formed with an outwardly extending baffle. The two ends of the spring abut against the baffle and the rear guide sleeve, respectively.

5. A cutting device for a hot heading machine according to claim 2, characterized in that: The rear end of the cutter bar has an oil cavity that communicates with the oil supply channel. The rear end of the cutter bar is fixedly provided with a sealing seat for forming a seal for the oil cavity. The oil supply assembly includes an oil supply hose connected to the sealing seat and communicating with the oil cavity.

6. A cutting device for a hot heading machine according to claim 5, characterized in that: The sealing seat has a hose cavity, and the oil supply hose is connected to the inner end of the hose cavity. The oil supply hose located in the hose cavity is arranged in a spiral shape, and the sealing seat is provided with a support rod for passing through the center of the spirally arranged oil supply hose.

7. A cutting device for a hot heading machine according to claim 5, characterized in that: The oil supply channel includes a first lubricating oil channel connecting the inner cavity of the oil to the inner wall of the rear guide sleeve, a second lubricating oil channel connecting the inner cavity of the oil to the outer wall of the joint shaft, and a third lubricating oil channel connecting the inner cavity of the oil to the inner wall of the front guide sleeve.

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