A high-precision pipe sawing machine for cutting and processing traffic guardrail posts.

Abstract

This invention discloses a high-precision pipe sawing machine for cutting traffic guardrail posts, belonging to the field of composite machine tool technology. It includes a pipe sawing frame, a base plate mounted on it, and a pipe-moving assembly, a spindle box, and a protective frame disposed on the base plate. The pipe-moving assembly has multiple pipe sleeves that can move radially and synchronously to clamp multiple pipes. The base plate has an "n"-shaped guide groove to guide the pipe ends between sawing and drilling positions. The spindle box is equipped with a circular saw blade driven by the same dual-axis motor and a ring-shaped array of drilling tool holders. During processing, the pipe-moving assembly clamps the pipe and feeds it radially to the sawing position. Simultaneously, the circular saw blade cuts, and the pipe rotates through friction wheel coupling to complete the cutting. The pipe is then released, revolves to the drilling position, clamps again, and is simultaneously drilled by the drilling tool holders. This invention achieves integrated multi-pipe synchronous sawing and drilling operations, offering advantages such as high processing efficiency, low saw blade wear, good processing accuracy, and high automation.

Description

Technical Field

[0001] This invention relates to the field of composite machine tool technology, and in particular to a high-precision pipe sawing machine for cutting traffic guardrail posts. Background Technology

[0002] Traffic guardrail posts, as the core supporting components of road isolation guardrails, are generally made of steel round tubes through processes such as cutting and drilling. Their processing accuracy and efficiency directly determine the assembly quality and production capacity of road guardrails. With the expansion of road traffic construction, the market demand for guardrail posts continues to increase, which puts forward higher requirements for the processing efficiency and accuracy of pipe processing equipment.

[0003] In the existing technology, the pipe cutting operation of guardrail posts is mostly completed by single-station pipe sawing equipment. Each clamping can only cut a single pipe, resulting in low processing efficiency and difficulty in meeting the capacity requirements of large-scale production. At the same time, the single-pipe processing mode involves high loading and unloading frequency of equipment, high labor intensity for operators, and high overall production cost.

[0004] To improve pipe sawing efficiency, some multi-pipe synchronous sawing equipment uses a cutting method where multiple pipes are arranged side by side and the circular saw blade is fed radially through them. This method can complete the synchronous cutting of multiple pipes at once. However, this processing method has obvious defects. The circular saw blade needs to penetrate the pipe wall and internal cavity of multiple pipes in sequence. The sawing stroke is long and the radial force on the saw blade changes continuously, which can easily lead to wobbling and wear. This not only significantly increases the cost of consumables for the circular saw blade, but also easily leads to differences in the cross-sectional accuracy of different pipes, affecting the flatness of the subsequent column installation.

[0005] On the other hand, during the assembly of traffic guardrails, horizontal isolation plates need to be installed on the posts. Therefore, corresponding installation holes need to be machined at the ends of the pipes to fix the connecting seats. In the existing processing flow, the drilling process and the pipe sawing process are independent of each other. After the pipes are cut, they need to be manually transferred to the drilling station and the drilling operation is completed by special drilling equipment or manual hand-held drilling machine. The process flow between the processes is time-consuming and the production cycle is not continuous, which further limits the overall processing efficiency of the guardrail posts. Summary of the Invention

[0006] One objective of this invention is to provide a high-precision pipe sawing machine for cutting and processing traffic guardrail posts. This invention can simultaneously achieve efficient processing of multiple pipes, low material consumption, and integrated sawing and drilling operations, in order to meet the needs of large-scale and high-precision processing and production of guardrail posts.

[0007] According to an embodiment of the present invention, a high-precision pipe sawing machine for cutting traffic guardrail posts includes a pipe sawing frame and a circular saw blade. The pipe sawing frame is fixedly mounted with a base plate on the non-cooperative surface of the pipe. Multiple guide grooves are arranged in a circular array on the base plate. A spindle box for driving circular saw blades to cut pipes is fixedly mounted on the substrate. Multiple drill bit holders are mounted in a circular array on the spindle box for mounting drill bits to drill holes in the pipes. A first friction wheel is mounted on the base plate and rotates concentrically with the circular saw blade. A dual-axis motor is fixedly installed in the spindle box and its two output shafts are respectively fixedly connected to the circular saw blade and the first friction wheel. It also includes a pipe-moving assembly mounted on the substrate. The pipe-moving assembly can clamp multiple pipes and, in conjunction with a circular saw blade and a drilling tool holder, complete the sawing and drilling of the pipes. The pipe-moving assembly includes a pipe support and a linkage seat. Both the pipe support and the linkage seat are disposed on the mating surfaces of the substrate and the pipes. The pipe support is rotatably mounted on the substrate. A first hydraulic cylinder is rotatably mounted on the substrate, and the telescopic end of the first hydraulic cylinder is rotatably connected to the pipe support. The extension of the first hydraulic cylinder drives the pipe support to rotate. Multiple linkage control second hydraulic cylinders are fixedly mounted on the pipe support. The linkage seat is fixedly mounted on the telescopic end of the multiple second hydraulic cylinders. The extension of the second hydraulic cylinder drives the linkage seat to move axially along the pipe support and away from the pipe support. A protective frame is fixedly mounted on the base plate to protect the circular saw blade.

[0008] Preferably, the guide groove on the substrate is in the shape of an "n" and consists of two straight grooves and one arc groove. The two straight grooves coincide with the axis of the circular saw blade and are of different lengths.

[0009] Preferably, the pipe transfer assembly further includes multiple pipe sleeves. The pipe support has multiple radial grooves arranged in a ring array, and the pipe sleeves are slidably installed in the grooves. Multiple clamps for clamping the pipe are fixedly installed in a ring array on the pipe sleeves. The clamps can be adjusted radially along the pipe sleeves without interfering with the axial transport of the pipe. A collar is rotatably installed on the pipe sleeve, and a connecting rod is hinged between the collar and the linkage seat. The linkage seat moves away from the pipe support along the axial direction of the pipe support, causing multiple pipe sleeves to move closer to the axis of the pipe support. A second friction wheel is fixedly fitted on the pipe sleeve.

[0010] Preferably, the sum of the radii of the first friction wheel and the second friction wheel is greater than the sum of the inner diameters of the pipe support and the pipe sleeve.

[0011] Preferably, the second hydraulic cylinder has two telescopic ends with different lengths of extension and retraction. The telescopic end with the shorter stroke of the second hydraulic cylinder faces the radial direction of the circular saw blade and is fixedly mounted with a spring holder. A locking wheel is fixedly mounted on the second friction wheel.

[0012] Preferably, the locking groove on the locking wheel and the locking head of the spring holder are both wedge-shaped, and the wedge-shaped inclined surface is set opposite to the rotation direction of the sleeve.

[0013] Preferably, a drive bevel gear is rotatably mounted inside the spindle box and is fixedly mounted on one output shaft of a dual-axis motor. Multiple driven bevel gears that mesh with the drive bevel gear are rotatably mounted in a ring array on the inner wall of the spindle box. The driven bevel gears are fixedly mounted on the input shaft of the drill bit holder.

[0014] Preferably, the protective frame is formed by splicing two rectangular frames together, and each of the four sides of the two rectangular frames has a slot with a width greater than the thickness of the circular saw blade, and the length of the protective frame is less than the diameter of the circular saw blade.

[0015] Preferably, a plurality of ball bearings are rotatably mounted on the contact surface between the protective frame and the circular saw blade.

[0016] The beneficial effects of this invention are: By using a pipe-moving assembly that can simultaneously clamp multiple pipes and an "n"-shaped guide groove trajectory design, the automatic transfer and positioning of multiple pipes between the sawing and drilling stations is realized. Combined with the fully automatic cycle of "clamping-sawing-releasing-rotating-re-clamping-drilling", two core processes can be completed in one clamping, completely eliminating the material loading, transfer and waiting time caused by single pipe processing and process separation in the traditional mode. The high level of automation greatly improves the efficiency of large-scale production and reduces the labor intensity of operators.

[0017] The innovative method of "friction wheel driving pipe rotation, circular saw blade rotating to cut single pipe wall thickness" replaces the traditional method of "circular saw blade radially penetrating to cut multiple pipes". This method significantly reduces the sawing stroke and force, effectively suppressing saw blade sway, vibration and abnormal wear when cutting cavities and multiple pipe walls, thus significantly extending the service life of the circular saw blade and reducing sawing consumable costs. At the same time, the cutting process is more stable, which helps to ensure the uniformity and high precision of the quality of all pipe cross-sections.

[0018] By integrating the circular saw blade and multiple drill bits into the same spindle box and driving them synchronously by a single dual-axis motor through a bevel gear set, this integrated design not only simplifies the equipment structure and reduces the equipment footprint and procurement costs, but more importantly, it achieves seamless connection between sawing and drilling processes in space and time, avoiding secondary clamping of workpieces between different devices and improving overall processing efficiency. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a high-precision pipe saw for cutting and processing traffic guardrail posts proposed in this invention; Figure 2This is a schematic diagram of the back structure of a high-precision pipe saw for cutting and processing traffic guardrail posts, as proposed in this invention.

[0020] Figure 3 This is a schematic diagram of the substrate structure in a high-precision pipe sawing machine for cutting traffic guardrail posts, as proposed in this invention.

[0021] Figure 4 This is a schematic diagram of the pipe-moving assembly in a high-precision pipe sawing machine for cutting and processing traffic guardrail posts, as proposed in this invention.

[0022] Figure 5 This is a schematic diagram showing the connection between the pipe frame and the linkage seat in a high-precision pipe sawing machine for cutting and processing traffic guardrail posts, as proposed in this invention.

[0023] Figure 6 This is a schematic diagram of the pipe sleeve structure in a high-precision pipe sawing machine for cutting and processing traffic guardrail posts, as proposed in this invention.

[0024] Figure 7 This is a schematic diagram of the spindle box in a high-precision pipe sawing machine for cutting traffic guardrail posts, as proposed in this invention.

[0025] Figure 8 This is a schematic diagram of the internal structure of the spindle box in a high-precision pipe sawing machine for cutting traffic guardrail posts, as proposed in this invention.

[0026] Figure 9 This is a schematic diagram illustrating the working principle of the protective frame in a high-precision pipe sawing machine for cutting and processing traffic guardrail posts, as proposed in this invention.

[0027] In the diagram: 1. Pipe sawing stand; 101. First hydraulic cylinder; 102. First friction wheel; 2. Substrate; 3. Pipe moving assembly; 301. Pipe support; 302. Linkage seat; 303. Pipe sleeve; 304. Second hydraulic cylinder; 305. Connecting rod; 306. Spring holder; 307. Second friction wheel; 4. Circular saw blade; 5. Spindle box; 501. Drill tool holder; 6. Protective frame. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0029] refer to Figure 1-9 This invention discloses a high-precision pipe sawing machine for cutting traffic guardrail posts, including a pipe sawing frame 1 and a circular saw blade 4, as shown in the reference. Figure 1A base plate 2 is fixedly mounted on the non-cooperative surface of the pipe and the pipe saw stand 1. Multiple guide grooves are arranged in a circular array on the base plate 2. A spindle box 5 for driving the circular saw blade 4 to cut the pipe is fixedly mounted on the base plate 2. Multiple drill bit holders 501 are arranged in a circular array on the spindle box 5 for mounting drill bits to drill holes in the pipe. (See reference...) Figure 2 The base plate 2 is equipped with a first friction wheel 102 that rotates concentrically with the circular saw blade 4. A dual-axis motor is fixedly installed in the spindle box 5, and the two output shafts are fixedly connected to the circular saw blade 4 and the first friction wheel 102 respectively. The base plate 2 also includes a pipe moving assembly 3, which can clamp multiple pipes and cooperate with the circular saw blade 4 and the drilling tool holder 501 to complete the sawing and drilling of the pipes. A protective frame 6 is fixedly installed on the base plate 2 to protect the circular saw blade 4. First, an external pipe feeder axially transports multiple fixed-length pipes through the various sleeves 303 of the pipe transfer assembly 3. The clamps on the sleeves 303 provide radial positioning and guidance for the pipes. After the equipment is started, the pipe transfer assembly 3 performs an automatic cycle of "retract-cut-support-rotate-retract-drill". That is, it first retracts and clamps the pipe, then feeds radially to complete synchronous sawing, then slightly opens to drive the pipe to rotate and switch positions, retracts and clamps again, feeds radially to complete synchronous drilling, opens after drilling, and the external pipe feeder feeds again, repeating the cycle. The power of the circular saw blade 4 and the drilling tool holder 501 is provided by the same dual-axis motor, realizing the integration of sawing and drilling processes.

[0030] refer to Figure 3 The guide groove on the substrate 2 is in the shape of an "n". The guide groove on the substrate 2 consists of two straight grooves and one arc groove. The two straight grooves coincide with the axis of the circular saw blade 4 and are of different lengths. Among them, the "n"-shaped guide groove on the substrate 2 is the motion trajectory constraint of the pipe end during the processing. The long straight groove corresponds to the sawing station. When the pipe moving assembly 3 drives multiple pipes to move radially and linearly along this groove towards the center, i.e. the position of the circular saw blade 4, the circular saw blade 4 rotates and performs a one-time synchronous sawing of all pipes. The arc groove connects the long and short straight grooves. When drilling is required after sawing, the pipe end moves around along this arc groove to realize the angle switch from the sawing station to the drilling station. The short straight groove corresponds to the drilling station. The pipe is fed radially again at this position, and the drilling tool holder 501 completes the end drilling.

[0031] refer to Figure 4 and Figure 5 The tube transfer assembly 3 includes a tube holder 301 and a linkage seat 302. Both the tube holder 301 and the linkage seat 302 are disposed on the mating surfaces of the substrate 2 and the tube. The tube holder 301 is rotatably mounted on the substrate 2. (Refer to...) Figure 2A first hydraulic cylinder 101 is rotatably mounted on the base plate 2, and the telescopic end of the first hydraulic cylinder 101 is rotatably connected to the tube frame 301. The extension of the first hydraulic cylinder 101 drives the tube frame 301 to rotate. Multiple linkage control second hydraulic cylinders 304 are fixedly mounted on the tube frame 301. The linkage seat 302 is fixedly mounted on the telescopic end of the multiple second hydraulic cylinders 304. The extension of the second hydraulic cylinders 304 drives the linkage seat 302 to move along the axial direction of the tube frame 301 and away from the tube frame 301. Among them, the pipe rack 301 serves as the core frame that supports multiple pipes. Its rotation is driven by the first hydraulic cylinder 101, which is used to realize the revolution switching of the pipe between sawing and drilling. The extension and retraction movement of the second hydraulic cylinder 304 is converted into linkage control of multiple pipe sleeves 303 through the linkage seat 302. It is the direct power source for its radial contraction and opening action. The two work together to precisely control the posture and position of the pipe in the process of "clamping-feeding-releasing-rotating-re-clamping-re-feeding". refer to Figure 5 and Figure 6 The pipe transfer assembly 3 also includes multiple pipe sleeves 303. The pipe support 301 has multiple radial grooves arranged in a ring array, and the pipe sleeves 303 are slidably installed in the grooves. Multiple clamps for clamping the pipe are fixedly installed in a ring array on the pipe sleeves 303. The clamps can be adjusted radially along the pipe sleeves 303 without interfering with the axial transport of the pipe. A collar is rotatably installed on the pipe sleeves 303, and a connecting rod 305 is hinged between the collar and the linkage seat 302. The linkage seat 302 moves away from the pipe support 301 along the axial direction of the pipe support 301, driving the multiple pipe sleeves 303 to move closer to the axis of the pipe support 301. A second friction wheel 307 is fixedly fitted on the pipe sleeves 303. The sleeve 303, connected to the linkage seat 302 via connecting rod 305, forms a radial expansion and contraction mechanism. When the second hydraulic cylinder 304 pushes the linkage seat 302 to move axially, the transmission of multiple sets of connecting rods 305 drives all sleeves 303 to slide synchronously and equidistantly within the radial grooves of the pipe support 301. Sliding towards the axis is called contraction, causing the clamps on each sleeve 303 to collectively grip the pipe, achieving synchronous centering and clamping of multiple pipes. This is the "retracting" action, used for radial feed during sawing and drilling. Sliding in the opposite direction is called opening, i.e., the "supporting" action, at which point the clamps release the radial constraint on the pipe, allowing... The pipe is axially fed by an external pipe feeder, or the pipe support 301 is allowed to drive the pipe to revolve. The second friction wheel 307 moves with the pipe sleeve 303 and is used to couple with the first friction wheel 102 to transmit torque during cutting. In this technical solution, the circular saw blade 4 does not directly cut through the pipe in order to extend its service life, but only cuts the wall thickness. Therefore, the pipe needs to rotate to complete the cut. The design of the short straight groove is designed to prevent the pipe from turning on its own and breaking the drill bit during drilling. When the pipe contracts in the short straight groove, the first friction wheel 102 and the second friction wheel 307 will not come into contact and couple. The sum of the radii of the first friction wheel 102 and the second friction wheel 307 is greater than the sum of the inner diameters of the pipe support 301 and the pipe sleeve 303; This dimensional relationship ensures that when the pipe is in the sawing station and the sleeve 303 is in the contracted clamping state, the first friction wheel 102 fixed on the base plate 2 can reliably contact the second friction wheel 307 that moves there with the sleeve 303. When drilling is required, the dual-axis motor drives the first friction wheel 102 to rotate, and through friction, drives the second friction wheel 307 and the sleeve 303 fixed thereto to rotate, thereby driving the clamped pipe to rotate around its own axis, rotating the position of the pipe wall to be drilled to the direction aligned with the drilling tool holder 501.

[0032] The second hydraulic cylinder 304 has two telescopic ends with one long and one short telescopic stroke. The telescopic end with the shorter stroke on the second hydraulic cylinder 304 faces the radial direction of the circular saw blade 4 and is fixedly mounted with a spring seat 306. A locking wheel is fixedly mounted on the second friction wheel 307. The long-stroke telescopic end is responsible for driving the linkage seat 302 to complete the main contraction and opening actions of the sleeve 303, while the short-stroke telescopic end is dedicated to controlling the spring clasp 306. During the drilling process, the short-stroke end extends and pushes the spring clasp 306 to radially engage with the locking wheel of the second friction wheel 307, locking the rotational freedom of the sleeve 303, ensuring that the pipe is absolutely stable during drilling and further protecting the drill bit.

[0033] The locking groove on the locking wheel and the clip head of the spring clip 306 are both wedge-shaped, and the wedge-shaped inclined surface is set opposite to the rotation direction of the sleeve 303. The wedge-shaped bevel is oriented in the opposite direction to the tendency of the sleeve 303 to rotate under the cutting force. This design ensures that any slight reversal during the sawing process will cause the locking groove and the wedge-shaped bevel of the chuck to bite tighter and tighter, forming a self-locking effect. This greatly enhances the reliability of locking, effectively resists sawing vibration and radial force, and prevents the pipe from circumferentially shifting during cutting.

[0034] refer to Figure 7 and Figure 8 A drive bevel gear is rotatably mounted inside the spindle box 5 and is fixedly mounted on one output shaft of a dual-axis motor. Multiple driven bevel gears that mesh with the drive bevel gear are rotatably mounted in a ring array on the inner wall of the spindle box 5. The driven bevel gears are fixedly mounted on the input shaft of the drill bit holder 501. One of the output shafts of the dual-axis motor drives the circular saw blade 4 and also drives the active bevel gear to rotate. The active bevel gear meshes with multiple driven bevel gears arranged in a ring around it, thereby distributing power at the same speed and synchronously to each drill bit holder 501. This allows all drill bits to be driven by the same motor, start simultaneously, and rotate synchronously, ensuring the synchronicity and consistency of drilling operations on multiple pipes.

[0035] refer to Figure 9 The protective frame 6 is composed of two rectangular frames spliced ​​together, and each of the four sides of the two rectangular frames has a slot with a width greater than the thickness of the circular saw blade 4. The length of the protective frame 6 is less than the diameter of the circular saw blade 4. Multiple ball bearings are rotatably installed on the contact surface between the protective frame 6 and the circular saw blade 4.

[0036] The protective frame 6 adopts a split splicing structure. When the circular saw blade 4 is working, the edge of the circular saw blade 4 can extend through the slot for cutting. Only the edge of the circular saw blade 4 is used to rotate and cut the pipe. Compared with the traditional through-type multi-pipe simultaneous cutting, it effectively reduces the working pressure of the circular saw blade 4. The protective frame 6 does not interfere with the cutting operation. At the same time, the design of the protective frame 6 can prevent the sawed pipe from hitting the circular saw blade 4. When the installed ball bearings make slight contact with the side of the high-speed rotating circular saw blade 4, they can change the sliding friction into rolling friction, which greatly reduces resistance and wear. At the same time, they can scrape off some of the chips attached to the side of the saw blade, which plays a certain cleaning role. On the other hand, it can provide axial support for the circular saw blade 4 and prevent the circular saw blade 4 from moving axially.

[0037] The core working principle of this invention lies in the fact that the tube transfer assembly automatically executes a cyclical action of "clamping-sawing-releasing-rotating-re-clamping-drilling" according to a preset program. Combined with a special circular saw blade rotation cutting method and power distribution system, multiple processes are completed in a single clamping operation. The specific working principle is as follows: The external pipe feeder sequentially passes multiple fixed-length pipes through the annular array of pipe sleeves in the pipe transfer assembly along the axial direction. The radially adjustable clamps on the pipe sleeves guide and initially position the pipes. After the equipment is started, the second hydraulic cylinder is activated, pushing the linkage seat to move axially along the pipe rack. Through multiple sets of linkage mechanisms, all pipe sleeves are synchronously driven to retract towards the axis along the radial grooves of the pipe rack, so that the clamps on each pipe sleeve hold the pipe together, achieving synchronous and centering clamping of multiple pipes. After all the pipes are clamped, their ends are located on the long straight section of the "n"-shaped guide groove on the base plate. At this time, the dual-axis motor starts and drives the circular saw blade to rotate at high speed. At the same time, the pipe moving assembly moves radially along the long straight guide groove towards the center of the circular saw blade. The key is that the circular saw blade does not cut through all the pipes, but only cuts into the wall of the outermost pipe. Meanwhile, the other output shaft of the dual-axis motor drives the first friction wheel to rotate. When the sleeve is in the clamped and contracted state and moves radially with the pipe to the sawing position, the second friction wheel fixed on the sleeve contacts and couples with the first friction wheel. The first friction wheel drives the second friction wheel to rotate through friction, thereby causing the clamped pipe to slowly rotate around its own axis. While the circular saw blade is rotating and cutting, the pipe continues to rotate, allowing the circular saw blade to gradually cut the entire wall thickness along the circumference of the pipe until a single pipe is cut off, which greatly shortens the sawing stroke and reduces saw blade wobble and wear. After all the pipes are cut at the sawing station, the second hydraulic cylinder moves in the opposite direction, driving all the pipe sleeves to open radially through the linkage seat and connecting rod. The clamps release the radial constraint on the pipes. Then, the first hydraulic cylinder works, driving the entire pipe rack to rotate a certain angle on the base plate. The cut end of the pipe slides in the arc-shaped groove of the "n"-shaped guide groove, and moves from the sawing station to the drilling station. After the pipe is clamped and locked at the drilling station, the second hydraulic cylinder is activated again, driving all the pipe sleeves to retract radially and re-clamp the pipe. Unlike the sawing station, the end of the pipe is located in the short straight guide groove at this time, and its radial retraction stroke is shorter. In this retraction state, the first friction wheel and the second friction wheel do not contact each other, power is not transmitted, and the pipe does not rotate. At the same time, the locking mechanism is activated to provide stable workpiece conditions for drilling. After the pipe is clamped and locked, the dual-axis motor continues to run. The power drives the active bevel gear through the dual-axis motor, which drives multiple driven bevel gears in the ring array to rotate synchronously, thereby activating the drill bits on all the drilling tool holders synchronously. The end of the pipe in the clamped state is radially fed towards the drill bit along the short straight guide groove, and the drilling operation is completed at the specified position on the end face of all the pipes in one go. Finally, after the reset and cyclic drilling are completed, the second hydraulic cylinder is activated, causing the spring retainer to retract and release the lock. At the same time, the sleeve radially opens to release the pipe. The external pipe feeder pushes out the processed pipe section and axially feeds a new batch of pipes to be processed into the sleeve. The equipment repeats the above steps to enter the next processing cycle.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-precision pipe sawing machine for cutting and processing traffic guardrail posts, characterized in that, It includes a pipe saw stand (1) and a circular saw blade (4). The pipe saw stand (1) is fixedly mounted with a base plate (2) on the non-cooperative surface of the pipe. Multiple guide grooves are arranged in a ring array on the base plate (2). A spindle box (5) for driving a circular saw blade (4) to cut pipes is fixedly installed on the substrate (2). Multiple drill bit holders (501) are installed in a ring array on the spindle box (5) for installing drill bits to drill holes in the pipes. A first friction wheel (102) is mounted on the base plate (2) and rotates concentrically with the circular saw blade (4). A dual-axis motor is fixedly installed inside the spindle box (5) and the two output shafts are fixedly connected to the circular saw blade (4) and the first friction wheel (102) respectively. It also includes a pipe-moving assembly (3) mounted on the base plate (2). The pipe-moving assembly (3) can clamp multiple pipes and, in conjunction with a circular saw blade (4) and a drilling tool holder (501), complete the sawing and drilling of the pipes. The pipe-moving assembly (3) includes a pipe support (301) and a linkage seat (302). The pipe support (301) and the linkage seat (302) are both disposed on the mating surfaces of the base plate (2) and the pipes. The pipe support (301) is rotatably mounted on the base plate (2). A first hydraulic cylinder is rotatably mounted on the base plate (2). (101) The telescopic end of the first hydraulic cylinder (101) is rotatably connected to the pipe rack (301). The extension of the first hydraulic cylinder (101) drives the pipe rack (301) to rotate. Multiple linkage control second hydraulic cylinders (304) are fixedly installed on the pipe rack (301). The linkage seat (302) is fixedly installed on the telescopic end of the multiple second hydraulic cylinders (304). The extension of the second hydraulic cylinder (304) drives the linkage seat (302) to move along the axial direction of the pipe rack (301) and away from the pipe rack (301). A protective frame (6) is fixedly mounted on the base plate (2) to protect the circular saw blade (4).

2. A high-precision pipe sawing machine for cutting and processing traffic guardrail posts according to claim 1, characterized in that, The guide groove on the substrate (2) is in the shape of an "n". The guide groove on the substrate (2) consists of two straight grooves and one arc groove. The two straight grooves coincide with the axis of the circular saw blade (4) and are of different lengths.

3. A high-precision pipe sawing machine for cutting and processing traffic guardrail posts according to claim 1, characterized in that, The pipe moving assembly (3) also includes multiple pipe sleeves (303). The pipe rack (301) has multiple radial grooves arranged in a ring array, and the pipe sleeves (303) are slidably installed in the grooves. Multiple clamps for clamping the pipe are fixedly installed in a ring array on the pipe sleeves (303). The clamps can be adjusted radially along the pipe sleeves (303) without interfering with the axial transport of the pipe. A collar is rotatably installed on the pipe sleeves (303), and a connecting rod (305) is hinged between the collar and the linkage seat (302). The linkage seat (302) moves away from the pipe rack (301) along the axial direction of the pipe rack (301) and drives the multiple pipe sleeves (303) to move closer to the axis of the pipe rack (301). A second friction wheel (307) is fixedly fitted on the pipe sleeves (303).

4. A high-precision pipe sawing machine for cutting and processing traffic guardrail posts according to claim 3, characterized in that, The sum of the radii of the first friction wheel (102) and the second friction wheel (307) is greater than the sum of the inner diameters of the pipe rack (301) and the pipe sleeve (303).

5. A high-precision pipe sawing machine for cutting and processing traffic guardrail posts according to claim 4, characterized in that, The second hydraulic cylinder (304) has two telescopic ends with one long and one short telescopic stroke. The telescopic end with the shorter stroke on the second hydraulic cylinder (304) faces the radial direction of the circular saw blade (4) and is fixedly mounted with a spring seat (306). A locking wheel is fixedly mounted on the second friction wheel (307).

6. A high-precision pipe sawing machine for cutting and processing traffic guardrail posts according to claim 5, characterized in that, The locking groove on the locking wheel and the locking head of the spring holder (306) are both wedge-shaped, and the wedge-shaped inclined surface is set opposite to the rotation direction of the sleeve (303).

7. A high-precision pipe sawing machine for cutting and processing traffic guardrail posts according to claim 1, characterized in that, The spindle box (5) has a drive bevel gear rotatably mounted inside and the drive bevel gear is fixedly mounted on one output shaft of a dual-axis motor. The inner wall of the spindle box (5) has multiple driven bevel gears that mesh with the drive bevel gear rotatably mounted in a ring array. The driven bevel gears are fixedly mounted on the input shaft of the drilling tool holder (501).

8. A high-precision pipe sawing machine for cutting and processing traffic guardrail posts according to claim 1, characterized in that, The protective frame (6) is formed by splicing two rectangular frames together, and the four sides of the two rectangular frames are provided with slots with a width greater than the thickness of the circular saw blade (4). The length of the protective frame (6) is less than the diameter of the circular saw blade (4).

9. A high-precision pipe sawing machine for cutting and processing traffic guardrail posts according to claim 8, characterized in that, Multiple ball bearings are rotatably installed on the contact surface between the protective frame (6) and the circular saw blade (4).

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