Multi-angle cutting equipment for metal bars

Abstract

The invention discloses multi-angle cutting equipment for metal bars, and belongs to the technical field of metal processing equipment. The equipment comprises a reciprocating sawing mechanism, a multi-angle adjusting mechanism and a fixed-point saw lifting mechanism, the reciprocating sawing mechanism is composed of a rack, a double-track swing rod, a sliding frame, a saw blade, a rotary disc and a belt driving mechanism, and the rotary disc drives the sliding frame to reciprocate through an eccentric connecting rod to achieve linear reciprocating cutting of the saw blade. The multi-angle adjusting mechanism is composed of a fixing base, a rotating base, a worm and gear and a clamping assembly, the feeding angle of the metal bars is adjusted by rotating the worm, and the metal bars with different lengths are supported through cooperation of an arc-shaped supporting rod, a sliding base and a supporting roller shaft. The fixed-point saw lifting mechanism comprises a balance weight type lifting assembly and a spring reset structure, and automatic saw lifting is achieved through cooperation of an extrusion inclined block and a limiting structure. The equipment can flexibly adjust the stroke and the cutting angle of the saw blade according to machining requirements, and multi-angle beveling operation is achieved.

Description

Technical Field

[0001] This invention belongs to the field of mechanical cutting technology, specifically relating to a multi-angle cutting device for metal bars. Background Technology

[0002] Currently, metal bar cutting is a common preliminary process in metal product processing, structural component manufacturing, and mechanical parts production. Traditional bar cutting equipment typically uses a fixed cutting method, requiring manual adjustment of the clamps and saw blade angles to achieve different cut shapes. However, this type of equipment generally suffers from problems such as difficulty in adjusting the cutting angle, low positioning accuracy, and low operating efficiency. For example, when cutting at beveled ends or specific angles, the operator needs to repeatedly loosen and re-clamp the bar, manually adjusting the angle. This process is complex and lacks repeatability, easily causing cutting errors and affecting the subsequent processing accuracy of the parts.

[0003] Furthermore, existing reciprocating sawing devices generally rely on a single motor to drive the saw blade in a linear reciprocating motion, lacking an adjustable control structure for different materials or cutting widths. This results in a fixed saw blade stroke, making it impossible to flexibly adjust according to the diameter or material characteristics of the metal bar, easily leading to mismatched cutting speeds and problems such as severe saw blade wear or rough cuts. At the same time, traditional equipment often uses manual pressure for sawing. If the operator applies uneven pressure or miscontrols it, the saw blade may break due to excessive force, or the cutting efficiency may be low due to insufficient force, seriously affecting the equipment's lifespan and safety.

[0004] During the cutting process, some equipment failed to properly coordinate the effects of gravity and the reset mechanism, causing the saw blade to fail to automatically lift after cutting, requiring manual reset. This increased the operational burden and posed potential safety hazards. Furthermore, most of the metal shavings and coolant generated during cutting were scattered directly at the bottom of the machine frame without a centralized collection structure, resulting in a messy working environment, inconvenient cleaning, and hindering the recycling of coolant.

[0005] Furthermore, most existing metal bar cutting devices only have single-angle or fixed-angle cutting functions and lack precise angle adjustment and self-locking mechanisms. When processing multi-angle end faces or combined bevels, external tooling is often required, which is cumbersome and makes it difficult to guarantee accuracy. For longer metal bars, common equipment lacks effective tail-end support and limiting structures, causing the bar to easily suspend in the air, resulting in vibration and displacement, which affects cutting accuracy and stability. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention aims to provide a multi-angle cutting device for metal bars. This device features adjustable angles, automatic saw lifting, and slag and liquid collection functions, thereby improving cutting accuracy and operational safety and overcoming the shortcomings of existing devices.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A multi-angle cutting device for metal bars includes a reciprocating sawing mechanism. The reciprocating sawing mechanism includes a frame placed on the ground. Support columns are symmetrically fixed on the rear side of the top of the frame. Double-rail swing rods are rotatably mounted on the top of the two support columns.

[0009] A slide is slidably installed below the surface of the double-rail swing rod. A saw blade is installed at the bottom of the slide. A handle is provided at the front end of the slide, and the handle extends beyond the frame. A slag tray is installed on the upper surface of the frame. A multi-angle adjustment mechanism is provided at the top of the frame.

[0010] The multi-angle adjustment mechanism is used to adjust the feeding angle of the metal rod. The multi-angle adjustment mechanism includes a fixed seat fixed on the surface of the slag tray and two support arms horizontally fixed on the rear side of the frame. The rear ends of the two support arms are fixed with arc-shaped support rods, and the arc-shaped support rods are aligned with the center of the fixed seat.

[0011] A fixed-point lifting mechanism is provided on the front side of the reciprocating sawing mechanism, which is used to press down the handle and lift it at a fixed point.

[0012] Furthermore, a turntable is rotatably mounted between the two support columns on the rear side, and a belt drive mechanism is provided on the rear side of the frame. The belt drive mechanism is used to drive the turntable to rotate. A connecting rod is hinged to the surface of the turntable. The connecting rod and the turntable are eccentrically arranged, and the front end of the connecting rod is hinged to the slide.

[0013] Furthermore, the fixed-point lifting saw mechanism includes a base placed on the ground, a fixed cylinder is provided on the upper surface of the base, a telescopic rod is vertically slidably installed on the top of the fixed cylinder, a U-shaped support with an upward opening is provided on the top of the telescopic rod, and the handle is placed inside the U-shaped support.

[0014] A second spring is placed inside the fixed cylinder, and the second spring applies an upward thrust to the telescopic rod.

[0015] Furthermore, fixed columns are symmetrically arranged on the front side of the base surface, and a lifting plate is slidably installed between two fixed columns. A central column is provided on the surface of the lifting plate, and multiple counterweights are evenly sleeved on the surface of the central column.

[0016] An end cap is fixedly installed on the top of the central column, and a docking hole is opened in the center of the upper surface of the end cap.

[0017] Furthermore, a pull cord is connected to the bottom of the handle, and a docking bolt is provided at the bottom of the pull cord, the docking bolt being adapted to the internal size of the docking hole;

[0018] The surface of the connecting bolt is provided with an annular groove.

[0019] Furthermore, a sliding rod is slidably passed through the surface of the docking hole. One end of the sliding rod is provided with a U-shaped limiting rod and the other end is provided with a compression limiting head. The end of the U-shaped limiting rod is adapted to the inner size of the annular groove. A first spring is sleeved on the surface of the sliding rod. The first spring is placed between the compression limiting head and the end cap. The first spring applies a thrust to the compression limiting head in the direction of the fixed cylinder.

[0020] The surface of the fixed cylinder is equipped with an extrusion wedge, and the extrusion limiting head is squeezed and retracted by the extrusion wedge when it moves down to the lowest position.

[0021] Furthermore, a rotating seat is installed inside the fixed seat, the rotating seat extends beyond the upper surface of the fixed seat, angle values ​​are uniformly engraved on the surface of the rotating seat, worm gear teeth are uniformly arranged on the surface of the rotating seat, and a worm is rotatably installed on one side inside the fixed seat, the worm meshing with the worm gear teeth.

[0022] Furthermore, a bidirectional screw is horizontally rotatably mounted on the top of the rotating seat, and clamps are symmetrically slidably mounted on the top of the rotating seat. The two clamps are respectively screwed onto different thread surfaces of the bidirectional screw, and the two clamps are used to clamp and fix the metal rod.

[0023] Furthermore, a track rod is provided on the upper surface of the arc-shaped support rod, a slide block is slidably mounted on the surface of the track rod, and a support roller shaft is horizontally rotatably mounted on the top of the slide block, the support roller shaft being used to support the metal rod.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] This invention solves the problem of uneven cuts and deviations in cutting trajectory caused by machine vibration during the sawing process by setting a double-rail swing rod on the top of the frame in conjunction with the slide. The frame adopts a thick-walled steel structure and is equipped with anti-vibration pads, which can effectively improve the stability of the equipment during operation, thereby improving the overall cutting accuracy and saw blade service life.

[0026] By setting a belt drive mechanism at the rear of the frame to drive the turntable to rotate eccentrically, and using a connecting rod to convert the rotational motion into linear reciprocating motion, the saw blade can achieve reciprocating strokes of different amplitudes. This structure can flexibly adjust the cutting stroke according to metal bars of different diameters and hardness, solving the problem that traditional fixed-stroke saw blades cannot adapt to multi-specification cutting needs. At the same time, the belt drive is smooth and has low noise, ensuring the continuity and stability of the cutting process.

[0027] By setting up a multi-angle adjustment mechanism on the frame and adopting a worm gear transmission structure, high-precision adjustable cutting angle of metal bars is achieved. The angle scale set on the rotary seat, combined with the self-locking characteristics of the worm gear, can maintain angle stability during the cutting process and avoid angle deviation caused by vibration, thus effectively solving the problems of difficult cutting angle adjustment and low positioning accuracy of existing equipment. At the same time, the arc-shaped support rod and track rod structure, together with the slide and support roller shaft, can provide stable support for metal bars at different angles and lengths, prevent suspended vibration, and improve cutting flatness.

[0028] By setting a fixed-point saw lifting mechanism on the front of the equipment, and utilizing the coordinated action between the counterweight, the first spring, and the second spring, the automatic sawing and lifting functions of the saw blade are realized. During the sawing phase, the pressure is controlled by the counterweight to achieve constant force cutting, avoiding excessive or insufficient force on the saw blade caused by uneven pressure during manual operation. After cutting, the saw blade is automatically lifted by squeezing the wedge to trigger the unlocking structure and spring reset. This solves the problems of laborious manual saw lifting, delays, or damage to the saw blade caused by misoperation. This structure effectively improves operational safety and automation.

[0029] By setting up a slag collection tray to collect metal shavings and coolant generated during the cutting process, centralized management of cutting waste can be achieved, solving the problems of difficult cleaning and serious pollution of the working environment of existing equipment. The slag collection tray has a drain port at the bottom, which can be connected to the coolant circulation system, which not only facilitates waste liquid recycling but also extends the coolant service life, improving the environmental friendliness and maintenance convenience of the equipment. Attached Figure Description

[0030] Figure 1 This is a front view structural diagram of the present invention;

[0031] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 3 This is a three-dimensional structural diagram of the sawing mechanism of the present invention;

[0033] Figure 4 This is a schematic diagram of the installation structure of the multi-angle adjustment mechanism of the present invention;

[0034] Figure 5 This is a schematic cross-sectional view of the fixing seat structure of the present invention;

[0035] Figure 6 This is a three-dimensional structural diagram of the lifting mechanism of the present invention;

[0036] Figure 7 For the present invention Figure 6 A schematic diagram of the cross-sectional structure;

[0037] Figure 8This is a three-dimensional cross-sectional structural diagram of the end cap of the present invention. Detailed Implementation

[0038] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0039] Example 1:

[0040] See Figure 1-8 A multi-angle cutting device for metal bars includes a reciprocating sawing mechanism 1, which includes a frame 11 placed on the ground.

[0041] Existing metal bar cutting devices often suffer from insufficient structural stability during use, which causes the frame to vibrate during high-speed reciprocating sawing, affecting cutting accuracy and saw blade life.

[0042] To this end, the frame 11 adopts a thick-walled steel plate welded structure and is equipped with anti-slip pads at the bottom to ensure stable support;

[0043] Support columns 12 are symmetrically fixed on the rear top of the frame 11. The support columns 12 are made of high-strength alloy round tubes to ensure support rigidity.

[0044] Two support columns 12 are rotatably mounted on top of a double-rail swing rod 15. The double-rail swing rod 15 adopts a double parallel round rod structure to ensure that the carriage 16 runs in a balanced manner during reciprocating motion.

[0045] A slide 16 is slidably mounted below the surface of the double-rail swing arm 15. A saw blade 17 is mounted at the bottom of the slide 16. The slide 16 is connected to the double-rail swing arm 15 through a linear bearing to reduce frictional resistance.

[0046] A handle 151 is provided at the front end of the carriage 16. The handle 151 extends beyond the front side of the frame 11 for easy manual pressing.

[0047] A slag tray 19 is installed on the upper surface of the frame 11. The slag tray 19 is made of stainless steel and is used to collect metal shavings and coolant generated during the cutting process to prevent debris from accumulating inside the frame and affecting cleaning.

[0048] The top of the frame 11 is equipped with a multi-angle adjustment mechanism 2, which is used to adjust the feeding angle of the metal rod to solve the problem of difficult cutting angle adjustment in traditional equipment;

[0049] The multi-angle adjustment mechanism 2 includes a fixed seat 21 fixed on the surface of the slag tray 19 and two support arms 27 horizontally fixed on the rear side of the frame 11. The rear ends of the two support arms 27 are fixed with arc-shaped support rods 28. The arc-shaped support rods 28 are aligned with the center of the fixed seat 21 to ensure concentricity accuracy during rotation.

[0050] A fixed-point lifting mechanism 3 is provided on the front side of the reciprocating sawing mechanism 1. The fixed-point lifting mechanism 3 is used to realize the downward pressing and automatic lifting of the handle 151, so as to solve the problem that the traditional manual saw lifting operation is laborious and has safety hazards.

[0051] See Figure 1-3 A turntable 13 is rotatably mounted between the two support columns 12 on the rear side, and an eccentric drive connection structure is formed between the turntable 13 and the carriage 16.

[0052] Traditional reciprocating saws mostly use crank or electromagnetic drive, which can easily lead to problems such as fixed stroke and uneven force, resulting in decreased cutting stability.

[0053] Therefore, a belt drive mechanism 14 is provided on the rear side of the frame 11. The belt drive mechanism 14 is used to drive the turntable 13 to rotate. The belt drive mechanism 14 includes a motor, a pulley and a transmission belt. Smooth start-up and low-noise operation can be achieved through belt drive.

[0054] A connecting rod 18 is hinged to the surface of the turntable 13. The connecting rod 18 is eccentrically set to the turntable 13, and the front end of the connecting rod 18 is hinged to the carriage 16.

[0055] When the belt drive mechanism 14 is started, the turntable 13 drives the slide 16 to slide back and forth along the double-rail swing rod 15 through the connecting rod 18, so that the saw blade 17 forms a linear reciprocating motion. The reciprocating stroke can be adjusted by changing the installation point of the connecting rod 18 at different holes in the turntable 13, thereby adapting to the cutting needs of metal bars of different specifications.

[0056] See Figure 6-8 The fixed-point lifting saw mechanism 3 includes a base 31 placed on the ground. The base 31 adopts a cast iron structure to improve overall stability.

[0057] A fixing cylinder 32 is provided on the upper surface of the base 31, and a telescopic rod 33 is vertically slidably installed on the top of the fixing cylinder 32. A U-shaped support 34 with an upward opening is provided on the top of the telescopic rod 33.

[0058] Traditional manual saw lifting methods have problems such as untimely reset and difficulty in controlling the depth of saw blade pressing, which can easily lead to excessively deep cuts or equipment damage.

[0059] The U-shaped support 34 supports the handle 151 on the inner side, which is used to automatically lift the saw blade 17 after cutting.

[0060] A second spring 314 is placed inside the fixed cylinder 32. The second spring 314 applies an upward thrust to the telescopic rod 33, enabling the telescopic rod 33 to automatically reset, thereby realizing the automatic lifting of the saw blade 17 and reducing the risk of human error.

[0061] See Figure 6-8 The base 31 has symmetrically arranged fixed columns 35 on the front side of its surface. The fixed columns 35 are used to support the lifting plate 36 and guide its vertical movement.

[0062] Traditional downward sawing structures cannot effectively control the downward speed and stroke, which can easily cause uneven stress on the saw blade;

[0063] A lifting plate 36 is slidably installed between two fixed columns 35. A central column 361 is provided on the surface of the lifting plate 36, and multiple counterweights 37 are evenly sleeved on the surface of the central column 361.

[0064] The counterweight 37 is used to assist the saw blade 17 in applying uniform downward pressure through gravity, ensuring stable cutting.

[0065] An end cap 38 is fixedly installed on the top of the center column 361. A docking hole 381 is opened in the center of the upper surface of the end cap 38. The docking hole 381 is used to insert a control device to realize the locking and releasing function of the downward sawing action.

[0066] See Figure 6-7 The bottom of the handle 151 is connected to a pull rope 311, and the bottom of the pull rope 311 is provided with a docking bolt 312, which is adapted to the internal size of the docking hole 381.

[0067] In the existing structure, the rope pulling mechanism often causes delays in action due to loose or unsecured connections, affecting the synchronization of cutting.

[0068] Therefore, the 312 bolt adopts a high-strength steel structure to improve wear resistance;

[0069] The surface of the connecting bolt 312 is provided with an annular groove 313, which cooperates with the locking mechanism to precisely limit the downward sawing position during the cutting process and prevent excessive downward sawing.

[0070] See Figure 7-8 A sliding rod 39 is slidably passed through the surface of the mating hole 381. A U-shaped limiting rod 391 is provided at one end of the sliding rod 39, and a compression limiting head 392 is provided at the other end.

[0071] Traditional sawing structures suffer from delayed repositioning during saw lifting, requiring manual intervention.

[0072] To achieve automatic unlocking and reset, the end of the U-shaped limit rod 391 is adapted to the inner dimension of the annular groove 313, and is used to lock or release the docking bolt 312;

[0073] A first spring 310 is sleeved on the surface of the slide rod 39. The first spring 310 is placed between the extrusion limiting head 392 and the end cap 38. The first spring 310 applies a pushing force to the extrusion limiting head 392 in the direction of the fixed cylinder 32, so that the slide rod 39 remains in a locked state.

[0074] The surface of the fixed cylinder 32 is equipped with a pressing wedge 315. When the saw blade 17 moves down to the set depth, the pressing wedge 315 exerts a pressing effect on the pressing limit head 392, thereby pushing the slide bar 39 to retract inward, releasing the locking of the docking bolt 312, realizing the automatic lifting of the saw blade 17, and preventing the saw blade 17 from cutting too deeply and causing damage to the equipment.

[0075] See Figure 5 The fixed base 21 has a rotating base 22 installed inside it. The rotating base 22 extends beyond the upper surface of the fixed base 21, and angle values ​​are uniformly engraved on the surface of the rotating base 22.

[0076] Existing equipment generally lacks a precise angle adjustment structure, resulting in insufficient machining accuracy of the beveled end face;

[0077] The surface of the rotating seat 22 is evenly provided with worm gear teeth 23, and a worm 24 is rotatably installed on one side of the interior of the fixed seat 21. The worm 24 meshes with the worm gear teeth 23.

[0078] The rotating worm gear 24 can drive the rotating seat 22 to perform high-precision angle adjustment, and the reverse self-locking characteristic of the worm gear transmission is used to achieve positioning and fixation, preventing angle deviation.

[0079] See Figure 5 A bidirectional screw 25 is horizontally rotatably mounted on the top of the rotating seat 22, and a clamp 26 is symmetrically slidably mounted on the top of the rotating seat 22.

[0080] The two clamps 26 are respectively screwed onto different threaded surfaces of the bidirectional screw 25;

[0081] Traditional metal rod clamping structures have uneven clamping force, are inconvenient to adjust, and are prone to loosening during cutting vibrations;

[0082] This structure achieves synchronous approach or separation of the two clamps 26 through the rotation of the bidirectional screw 25, thereby providing highly stable clamping of the metal rod.

[0083] The rotating base 22, in conjunction with the angle scale, enables multi-angle cutting positioning, improving the controllability of the cutting angle.

[0084] See Figure 5 The upper surface of the arc-shaped support rod 28 is provided with a track rod 29, and a slide block 210 is slidably installed on the surface of the track rod 29. A support roller shaft 211 is horizontally rotatably installed on the top of the slide block 210.

[0085] Traditional bar support structures often result in long bars being suspended and deformed during cutting due to insufficient length or lack of self-adaptability;

[0086] The arc-shaped support rod 28 coincides with the center of the fixed seat 21, allowing the slide 210 to slide along the track rod 29 to adjust the distance, thus accommodating metal rods of different lengths;

[0087] The support roller 211 adopts a roller shape that is large at both ends and small in the middle, which can stably support and limit the metal rod, reduce vibration during cutting, and improve processing accuracy and safety.

[0088] Example 2:

[0089] See Figure 1-8 The operation process of a multi-angle cutting device for metal bars is as follows:

[0090] Before cutting, the operator first connects the equipment's electrical control box to the power supply. The control box contains a main control circuit module, drive relays, and overload protection devices, used to control the start, stop, and speed of the belt drive mechanism 14. Anti-vibration rubber feet are installed under the frame 11 to reduce vibration during operation and ensure cutting accuracy.

[0091] The operator places the metal bar on the rotating seat 22 of the multi-angle adjustment mechanism 2 according to the processing requirements. The surface of the rotating seat 22 is engraved with angle scales from 0° to 90°. The operator can adjust the worm gear 24 by turning the knob, causing the worm gear 24 to drive the meshing worm wheel 23 to rotate, thereby adjusting the angle of the rotating seat 22. Because the worm gear has a reverse self-locking characteristic, the rotation angle can be automatically locked after adjustment to avoid deviation caused by vibration during processing.

[0092] Subsequently, the operator rotates the bidirectional screw 25, which has positive and negative threaded sections at both ends. Two clamps 26 engage with the corresponding threaded surfaces. By rotating the bidirectional screw 25, the two clamps 26 move closer together and clamp the metal bar, achieving high-strength fixation of the bar. The inner wall of the clamps 26 is covered with a wear-resistant rubber layer to increase friction and prevent scratches on the metal surface.

[0093] When the metal bar is long, the slide block 210 can slide along the track rod 29 to adjust its position, so that the support roller shaft 211 is exactly below the tail end of the bar. The support roller shaft 211 is connected to the slide block 210 through a rolling bearing, and its outer surface has a concave arc structure in the middle, which is used to stabilize the support bar and prevent lateral slippage or wobbling when adjusting the rotation angle. The track rod 29 is fixed on the arc-shaped support rod 28, and the center of the arc-shaped support rod 28 is consistent with that of the fixed seat 21, which can ensure that the support point moves synchronously along the arc trajectory of the bar's rotation angle, preventing stress concentration caused by the offset of the support position.

[0094] After the metal bar is secured, the operator selects the connecting holes of the connecting rod 18 at different radii on the turntable 13 according to the required cutting stroke. The turntable 13 is driven to rotate by a belt drive mechanism 14, which includes a motor, a driving pulley, a driven pulley, and a wear-resistant synchronous belt. The motor output shaft is fixedly connected to the driving pulley, and the driving pulley and the driven pulley are driven by a synchronous belt. The driven pulley is mounted on the central shaft at the rear end of the turntable 13. After the electrical control box is started, the motor drives the driving pulley to rotate, thereby driving the turntable 13 to rotate smoothly.

[0095] The eccentric hinge point of the turntable 13 is connected to the connecting rod 18, and the other end of the connecting rod 18 is hinged to the front end of the carriage 16. The eccentric motion converts the circular rotation into reciprocating linear motion. The connecting rod 18 uses a ball joint connection, which reduces sway during movement and ensures smooth movement of the saw blade 17. The carriage 16 cooperates with the double-rail swing rod 15 through a sliding bearing, resulting in low sliding friction and high positioning accuracy. The saw blade 17 is fixed to the bottom of the carriage 16 and is made of high-speed steel, suitable for cutting various metal materials such as steel bars, aluminum bars, and copper bars.

[0096] During cutting, the operator holds handle 151 and moves the metal bar to a suitable position below the saw blade 17. At this time, the fixed-point lifting saw mechanism 3 is in its initial state, and the second spring 314 applies an upward pushing force to the telescopic rod 33. The telescopic rod 33 drives the U-shaped support 34 to rise, so that the handle 151 is in the raised position.

[0097] To perform the downward sawing operation, the operator inserts the connecting bolt 312 into the connecting hole 381 on the end cap 38. During insertion, the connecting bolt 312 compresses the U-shaped limiting rod 391, and the first spring 310 stores force. After the connecting bolt 312 is fully embedded and engages with the annular groove 313, the slide rod 39 returns to its original position, thus locking the saw blade 17. Subsequently, the operator controls the downward sawing speed and pressure by adjusting the number of counterweights 37 on the lifting plate 36. The counterweights 37 slide along the central column 361 and are fixed by slots. The cutting force can be adjusted according to the material or diameter of the metal rod to achieve constant force downward sawing.

[0098] When the motor starts, the turntable 13 drives the slide 16 to slide back and forth, and the saw blade 17 begins to cut the metal bar at high speed. Due to the combined action of gravity and the counterweight 37, the lifting plate 36 moves down along the fixed column 35, and the handle 151 is pressed down by the pull rope 311, so that the saw blade 17 can cut smoothly. The metal chips and coolant generated during the cutting process fall into the slag collection tray 19 and are collected by the slag collection tray 19 to reduce equipment pollution.

[0099] When the saw blade 17 cuts to the bottom of the metal bar, the telescopic rod 33 continues to move downward and compresses the second spring 314. At the same time, the extrusion limiting head 392 touches the extrusion wedge 315 installed on the surface of the fixed cylinder 32. The extrusion wedge 315 pushes the extrusion limiting head 392 inward, and the slide rod 39 moves to disengage the U-shaped limiting rod 391 from the annular groove 313 of the connecting bolt 312, thereby releasing the limiting lock. At this time, the second spring 314 pushes the telescopic rod 33 upward under the action of the restoring elasticity, driving the U-shaped support 34 to rise, and then lifting the handle 151 through the pull rope 311, realizing the automatic lifting of the saw blade 17.

[0100] With the above structure, the equipment can automatically lift the saw after cutting, avoiding the situation where the saw blade 17 continues to press down and damage the frame 11 due to manual delay, thus improving safety and ease of operation. The entire cutting process forms a cycle of "saw down - cutting - automatic saw lifting - resetting", which can realize continuous and efficient multi-angle cutting of metal bars.

[0101] In addition, to ensure long-term stable operation of the equipment, a dustproof sealing ring is installed at the connection between the turntable 13 and the frame 11, and lubrication nozzles are provided on both sides of the slide 16. Regular oiling can reduce wear. The electrical control box is equipped with a temperature sensor and a current detection module. When the belt drive mechanism 14 or the motor is overloaded, the power supply can be automatically cut off to prevent the equipment from overheating and burning out. The bottom of the slag tray 19 is equipped with a drain port, which can be connected to the coolant circulation system through a hose to facilitate the recycling and reuse of waste liquid.

[0102] The working principle of this invention is as follows: An electrical control box is provided on one side of the frame 11 to control the belt drive mechanism 14. When the belt drive mechanism 14 is started, it can drive the turntable 13 to rotate. Since the turntable 13 is eccentrically connected to the connecting rod 18, and the slide 16 can only slide along the surface of the double-rail swing rod 15, the slide 16 can be pushed back and forth by the connecting rod 18 when the turntable 13 rotates, thereby driving the saw blade 17 at the bottom to move back and forth. Multiple holes with different distances from the center can be opened on the surface of the turntable 13 to adjust the different positions of the connecting rod 18 to control the amplitude of the single reciprocating movement of the saw blade 17. Then, by pressing down the double-rail swing rod 15 with the handle 151, the saw blade 17 can be driven down to cut the metal rod below. The metal chips or coolant produced by sawing will be collected by the slag tray 19 for centralized treatment.

[0103] A metal rod is placed on the surface of the rotating seat 22 and between two clamps 26. The rotating bidirectional screw 25 controls the two clamps 26 to move closer together to hold the metal rod via different thread surfaces. The cutting position is controlled by controlling the distance the metal rod extends and retracts. A knob is provided at the end of the worm 24. The rotation of the rotating seat 22 is controlled by the meshing of the worm 24 with the worm gear teeth 23. The rotation angle is controlled by the scale value on the surface of the rotating seat 22 and fixed by the reverse self-locking of the worm gear. Then, the cutting position is controlled by adjusting the distance between the metal rod and the saw blade 17. The angles are adjusted to achieve the sawing work on the beveled end face, thereby improving the practicality of the equipment. The tail of the metal rod is placed on the surface of the support roller 211. The support roller 211 is a roller structure with large ends and small center to support and limit the metal rod without affecting the feeding of the metal rod. When adjusting the angle of the metal rod, the slide 210 can be driven to slide along the surface of the track rod 29. Since the arc support rod 28 coincides with the center of the fixed seat 21, it can ensure effective support for the longer metal rod and prevent excessive suspension from affecting the stability after clamping.

[0104] During use, the second spring 314 applies an upward thrust to the telescopic rod 33, causing the U-shaped support 34 to apply an upward thrust to the handle 151, maintaining the saw-lifting state without force. The second spring 314 has limited elasticity and can only be used for lifting the saw. At the same time, the first spring 310 applies a thrust to the compression limiting head 392, causing the slide rod 39 to move inward as a whole. At this time, the end of the U-shaped limiting rod 391 enters the range of the docking hole 381. During use, first install an appropriate amount of counterweight 37 according to the sawing requirements, then fix the end cap 38 to the top of the center column 361 with bolts, manually lift the lifting plate 36, and then insert the docking bolt 312 into the inside of the docking hole 381. The bottom is provided with an arc-shaped chamfer. When inserted, it will squeeze the U-shaped limiting rod 391. The first spring 310 stores the force. When the docking bolt 312 is fully docked with the docking hole 381, the U-shaped limiting rod 391 will enter the inner side of the annular groove 313 to limit the docking bolt 312. At this time, the reciprocating sawing mechanism 1 is started to perform sawing work. Due to the weight of the counterweight 37, the lifting plate 36 moves down along the trajectory of the fixed column 35. When moving down, the handle 151 is pulled down by the pull rope 311 to perform the downward sawing work and ensure that the saw blade 17 is evenly stressed. It will not affect the cutting efficiency due to insufficient stress, nor will it cause the saw blade 17 to break due to excessive stress.

[0105] During the sawing process, the telescopic rod 33 gradually moves downward and compresses the second spring 314 by a distance, continuing to saw downward. When the saw blade 17 completely cuts the metal bar, the compression limiting head 392 is compressed and moved by the compression wedge 315. At this time, the end of the U-shaped limiting rod 391 can be pushed to disengage from the annular groove 313, and the bolt 312 can be disengaged from the limit. The stored force of the second spring 314 can push the telescopic rod 33 upward to reset, and then push the double-rail swing rod 15 to rotate upward to realize the lifting of the saw. The compression wedge 315 is a sleeve structure protrusion that is fixed to the fixed cylinder 32 by bolts. Therefore, the trigger point of lifting the saw can be adjusted by controlling the height of the compression wedge 315. This structure can realize automatic lifting of the saw, which makes up for the damage to the main body of the equipment caused by the saw blade 17 cutting too deep due to operation errors when sawing by gravity, and improves the safety of the equipment.

[0106] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A multi-angle cutting device for metal bars, comprising a reciprocating sawing mechanism (1), characterized in that: The reciprocating sawing mechanism (1) includes a frame (11) placed on the ground. Support columns (12) are symmetrically fixed on the rear side of the top of the frame (11). Double-rail swing rods (15) are rotatably mounted on the top of the two support columns (12). A slide (16) is slidably installed below the surface of the double-rail swing rod (15). A saw blade (17) is installed at the bottom of the slide (16). A handle (151) is provided at the front end of the slide (16). The handle (151) extends beyond the frame (11). A slag tray (19) is installed on the upper surface of the frame (11). A multi-angle adjustment mechanism (2) is provided at the top of the frame (11). The multi-angle adjustment mechanism (2) is used to adjust the feeding angle of the metal rod. The multi-angle adjustment mechanism (2) includes a fixed seat (21) fixed on the surface of the slag tray (19) and two support arms (27) horizontally fixed on the rear side of the frame (11). The rear ends of the two support arms (27) are fixed with arc-shaped support rods (28), and the arc-shaped support rods (28) are aligned with the center of the fixed seat (21). The reciprocating sawing mechanism (1) is provided with a fixed-point lifting saw mechanism (3) on the front side. The fixed-point lifting saw mechanism (3) is used to press down the handle (151) and lift it at a fixed point.

2. The multi-angle cutting equipment for metal bars according to claim 1, characterized in that: A turntable (13) is rotatably mounted between the two support columns (12) on the rear side. A belt drive mechanism (14) is provided on the rear side of the frame (11). The belt drive mechanism (14) is used to drive the turntable (13) to rotate. A connecting rod (18) is hinged to the surface of the turntable (13). The connecting rod (18) and the turntable (13) are eccentrically arranged. The front end of the connecting rod (18) is hinged to the slide (16).

3. The multi-angle cutting equipment for metal bars according to claim 1, characterized in that: The fixed-point lifting saw mechanism (3) includes a base (31) placed on the ground surface. A fixed cylinder (32) is provided on the upper surface of the base (31). A telescopic rod (33) is vertically slidably installed on the top of the fixed cylinder (32). A U-shaped support (34) with an upward opening is provided on the top of the telescopic rod (33). The handle (151) is placed inside the U-shaped support (34). A second spring (314) is placed inside the fixed cylinder (32), and the second spring (314) applies an upward thrust to the telescopic rod (33).

4. The multi-angle cutting equipment for metal bars according to claim 3, characterized in that: The base (31) has symmetrical fixed columns (35) on the front side of its surface. A lifting plate (36) is slidably installed between the two fixed columns (35). A central column (361) is provided on the surface of the lifting plate (36). Multiple counterweights (37) are evenly fitted on the surface of the central column (361). An end cap (38) is fixedly installed on the top of the central column (361), and a docking hole (381) is opened in the center of the upper surface of the end cap (38).

5. The multi-angle cutting equipment for metal bars according to claim 4, characterized in that: The bottom of the handle (151) is connected to a pull rope (311), and the bottom of the pull rope (311) is provided with a docking bolt (312), which is adapted to the internal size of the docking hole (381). The surface of the connecting bolt (312) is provided with an annular groove (313).

6. The multi-angle cutting equipment for metal bars according to claim 5, characterized in that: A slide rod (39) is slidably passed through the surface of the docking hole (381). A U-shaped limiting rod (391) is provided at one end of the slide rod (39) and a compression limiting head (392) is provided at the other end. The end of the U-shaped limiting rod (391) is adapted to the inner size of the annular groove (313). A first spring (310) is sleeved on the surface of the slide rod (39). The first spring (310) is placed between the compression limiting head (392) and the end cap (38). The first spring (310) applies a thrust to the compression limiting head (392) in the direction of the fixed cylinder (32). The surface of the fixed cylinder (32) is equipped with an extrusion block (315), and the extrusion limiting head (392) is extruded and retracted by the extrusion block (315) when it moves down to the lowest position.

7. The multi-angle cutting equipment for metal bars according to claim 1, characterized in that: The fixed seat (21) is equipped with a rotating seat (22), which extends beyond the upper surface of the fixed seat (21). Angle values ​​are uniformly engraved on the surface of the rotating seat (22), and worm gear teeth (23) are uniformly arranged on the surface of the rotating seat (22). A worm (24) is rotatably installed on one side inside the fixed seat (21), and the worm (24) meshes with the worm gear teeth (23).

8. The multi-angle cutting equipment for metal bars according to claim 7, characterized in that: The top of the rotating seat (22) is horizontally rotatably mounted with a bidirectional screw (25), and the top of the rotating seat (22) is symmetrically slidably mounted with a clamp (26). The two clamps (26) are respectively screwed onto different thread surfaces of the bidirectional screw (25), and the two clamps (26) are used to clamp and fix the metal rod.

9. A multi-angle cutting device for metal bars according to claim 8, characterized in that: The upper surface of the arc-shaped support rod (28) is provided with a track rod (29), and a slide block (210) is slidably installed on the surface of the track rod (29). A support roller shaft (211) is horizontally rotatably installed on the top of the slide block (210), and the support roller shaft (211) is used to support the metal rod.

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