A high-speed circular saw

Abstract

This utility model belongs to the field of mechanical manufacturing equipment technology, and particularly relates to a high-speed circular saw, comprising: a machine body on which a saw frame is movably arranged; a rotating seat located at the right end of the saw frame and capable of horizontal rotation around an axis; a bearing seat located at the left end of the saw frame; a drive unit, which is a drive motor located at the outer end of the rotating seat; a cutting unit located between the rotating seat and the bearing seat, the cutting unit comprising multiple parallel saw blades; and a protective cover located on the saw frame and behind the cutting unit. The saw blades are driven to rotate by the drive unit, and the drive shaft of the drive motor passes through the rotating seat and the cutting unit and is rotatably connected to the bearing seat via a connecting bearing. Compared with the prior art, this utility model effectively improves work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical manufacturing equipment technology, and in particular relates to a high-speed circular saw. Background Technology

[0002] Circular saws are industrial equipment used for cutting metal materials. They are mainly developed and manufactured by professional manufacturers. For example, the metal circular saw mechanism disclosed in patent application number CN202321764410.4 includes a mounting base and a positioning frame rotatably mounted on the mounting base. The positioning frame is equipped with a saw blade and a drive mechanism for driving the saw blade to rotate. A tension spring for assisting the positioning frame to lift is installed between the positioning frame and the mounting base. A handle is installed on the positioning frame. An arc-shaped frame is fixedly mounted on the mounting base. The arc-shaped frame is provided with a guide groove. A connecting pipe passing through the guide groove is fixedly provided on the handle. A locking mechanism for restricting the movement of the handle is provided between the connecting pipe and the arc-shaped frame. The handle is also provided with an unlocking mechanism for locking the handle.

[0003] The existing circular saw has a low efficiency when cutting multiple sections of metal pipes and bars using a single saw blade, which affects work efficiency. In addition, the waste chips generated during the cutting process are often discharged directly after being guided by the saw blade guard, which pollutes the working environment and is prone to secondary splashing of waste chips. Therefore, it is necessary to make improvements. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a high-speed circular saw that effectively improves work efficiency and effectively collects waste chips.

[0005] In view of this, the present invention provides a high-speed circular saw, comprising:

[0006] The machine body, on which a saw frame is movably arranged;

[0007] Also includes:

[0008] A rotating base is provided at the right end of the saw frame and is capable of rotating horizontally around an axis.

[0009] A bearing housing, which is located at the left end of the saw frame;

[0010] The drive unit is a drive motor arranged at the outer end of the rotating base;

[0011] A cutting unit is arranged between a rotating seat and a bearing seat, and the cutting unit includes multiple parallel saw blades.

[0012] A protective cover is mounted on the saw frame and located at the rear of the cutting unit;

[0013] The saw blade is driven to rotate by a drive unit, and the drive shaft of the drive motor passes through the rotating seat and the cutting unit and is rotatably connected to the bearing seat through a connecting bearing.

[0014] In this technical solution, by arranging multiple saw blades in the cutting unit, the drive unit drives multiple saw blades to rotate and cut the workpiece during the cutting operation, thereby cutting the workpiece into multiple segments at one time, which effectively improves work efficiency. Furthermore, by rotating the rotating seat horizontally around the axis, the multiple saw blades on the cutting unit can be adjusted to facilitate different multi-segment cutting operations.

[0015] In the above technical solution, the cutting unit further includes:

[0016] A bushing, which is sleeved on the drive shaft of the drive motor and rotates with the rotation of the drive shaft;

[0017] A spacer sleeve, wherein several spacer sleeves are arranged alternately on the bushing with multiple saw blades;

[0018] Multiple saw blades rotate synchronously by driving the bushing through the drive shaft.

[0019] Furthermore, the above technical solution also includes:

[0020] A connecting pipe is arranged on the protective cover and communicates with the inside of the protective cover, and the length direction of the connecting pipe coincides with the top tangent of the protective cover.

[0021] A waste container, wherein the inlet end of the waste container is detachably connected to the connecting pipe by a snap-fit ​​connection;

[0022] The waste container is connected to the connecting pipe.

[0023] Furthermore, in the above technical solution, a vacuum insulation layer is arranged in the wall of the waste container.

[0024] In the above technical solution, the connecting pipe is further provided with an air channel that connects the external environment and the waste container.

[0025] The beneficial effects of this utility model are:

[0026] 1. By using multiple saw blades to cut simultaneously, the efficiency of multi-segment cutting operations can be effectively improved when cutting pipes and bars. At the same time, the load is evenly distributed by multiple saw blades, which reduces the single-axis load of the drive system and reduces the temperature rise of the motor, thereby extending the service life of the equipment.

[0027] 2. The arrangement of connecting pipes and waste containers can effectively facilitate the collection of cutting waste and reduce pollution of the working environment;

[0028] 3. The vacuum insulation layer of the waste container effectively reduces the temperature of the outer wall, allowing operators to directly contact it without protective gloves, which facilitates timely cleaning of waste. The tangential design of the protective cover and connecting pipe effectively improves the waste collection efficiency, eliminates secondary splashing, and improves the working environment. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model.

[0031] Figure 2 This is a schematic diagram of the cutting unit structure of this utility model.

[0032] Figure 3 This is a schematic diagram of the rotating seat structure in the rotating state of this utility model.

[0033] Figure 4 This is an exploded view of the cutting unit structure of this utility model.

[0034] Figure 5 This is a schematic diagram of the waste container structure of this utility model.

[0035] The markings in the diagram are as follows:

[0036] 1. Saw frame; 2. Rotating seat; 3. Bearing seat; 4. Drive unit; 5. Cutting unit; 50. Saw blade; 51. Bushing; 52. Spacer sleeve; 6. Protective cover; 7. Connecting pipe; 8. Waste chip container; 9. Vacuum insulation layer; 10. Air passage. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0039] Overall structure of high-speed circular saw

[0040] The machine body can be made of HT300 cast iron, with adjustable anchor bolts at the bottom, and a flatness error ≤0.02mm / m. The saw frame 1 can be connected to the machine body via guide rails or a rotating shaft. The feed drive uses a combination of a servo motor and a ball screw, with a positioning accuracy of ±0.05mm. The rotating seat 2 is located at the right end of the saw frame 1, made of QT450-10 ductile iron, and internally equipped with double-row tapered roller bearings (model 352024), allowing for horizontal rotation adjustment.

[0041] The drive unit 4 uses a Y2-200L2-6 type three-phase asynchronous motor (power 15kW, speed 980rpm). The motor housing is equipped with heat dissipation fins (thickness 5mm, spacing 30mm). The drive shaft has a diameter of 45mm, is made of 40Cr, and has a surface hardening hardness of HRC48-52. After passing through the rotating seat 2, the drive shaft is fixed to the bushing 51 by a lock nut. The left end bearing seat 3 is made of cast steel (ZG310-570) and houses a deep groove ball bearing (6310). The bearing seat 3 is bolted to the saw frame 1, and the surface roughness Ra ≤ 3.2μm.

[0042] Cutting unit

[0043] The bushing 51 is made of 42CrMo alloy steel tube, with an inner hole that is interference-fitted with the drive shaft (interference 0.02-0.04mm). The outer surface is machined with a positioning groove for installing the spacer 52. The spacer 52 is made of silicon nitride ceramic (hardness ≥ HRA85), with thicknesses of 5mm, 10mm, 15mm, and 20mm. It is fixed by an axial positioning ring (material 65Mn, heat treated HRC42-46). Adjacent spacers 52 are arranged alternately with the saw blade 50.

[0044] The saw blade 50 uses a cemented carbide matrix (grade YT15), with diamond particles (80 / 100 mesh) brazed around the circumferential cutting edge. The saw teeth have a rake angle of 15° and a clearance angle of 10°. When multiple saw blades are installed synchronously, the minimum spacing is 8mm (using a 5mm spacer sleeve 52 + 3mm saw blade 50 thickness). The cutting length can be adjusted from 8-100mm by adjusting the spacer sleeve 52 combination.

[0045] The connection between bushing 51 and the drive shaft is via spline drive, transmitting a torque ≥150 N·m. The axial runout of the cutting unit 5 is ≤0.03 mm, and the radial runout is ≤0.05 mm, achieved through concentricity calibration (coaxiality ≤0.02 mm) of the bearing housing 3 and the rotating seat 2. After the saw blade 50 is installed, a preload (torque 120-150 N·m) is applied using locking nuts (model M60×2) to prevent loosening during high-speed rotation.

[0046] Protective cover, connecting pipe and waste container

[0047] The protective cover 6 adopts a double-layer welded steel plate structure. The inner layer is a 3mm thick 304 stainless steel plate, and the outer layer is a 2mm thick aluminum alloy plate (grade 6061). The middle layer is filled with 10mm thick glass fiber cotton (thermal conductivity ≤0.04W / (m・K)). The protective cover 6 has an arc-shaped cross-section, and the radius of curvature matches the outer circle of the saw blade 50. The opening direction faces the cutting area, and the inner side is equipped with anti-splash mesh (5mm×5mm aperture, made of spring steel).

[0048] The connecting pipe 7 is arranged along the top tangent of the protective cover 6. The inlet end is welded to the protective cover 6, and the outlet end is provided with a snap-fit ​​groove. A guide plate (45° angle) is provided inside to guide the waste debris along the pipe wall to achieve centrifugal separation.

[0049] The waste container 8 is made of double-layer stainless steel plate with a vacuum insulation layer 9 in the middle (vacuum degree ≤0.1Pa). The insulation layer effectively reduces heat conduction, keeping the outer wall temperature of the container ≤50℃ (when the internal waste temperature is 300℃). The top of the container is equipped with a snap-fit ​​flange (which mates with the groove of the connecting pipe), and an air channel 10 (diameter 20mm) is opened on the side. A metal mesh filter (pore size 0.5mm) is installed in the channel.

[0050] The cutting debris (velocity ≥20m / s) is guided to the connecting pipe by the protective cover 6. Due to the centrifugal effect of the tangential arrangement, larger particles settle first, while smaller particles enter the debris container 8 with the airflow. The vacuum insulation layer 9 blocks heat transfer, and the air channel 10 maintains internal pressure balance. The debris container 8 can be quickly disassembled via a snap-fit ​​structure, allowing direct contact with the outer wall temperature without waiting for cooling.

[0051] Preferably, the vacuum insulation layer 9 in the waste container 8 can extend further to the snap-fit ​​flange, thereby further blocking heat transfer, and a gap can also be arranged between the inserted part of the waste container 8 and the connecting pipe 7, thereby blocking heat transfer.

[0052] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A high-speed circular saw, comprising: The machine body, on which a saw frame (1) is movably arranged; Its characteristic is that it further includes: Rotating seat (2), the rotating seat (2) is located at the right end of the saw frame (1) and the rotating seat (2) can rotate horizontally around an axis; Bearing seat (3), the bearing seat (3) is arranged at the left end of the saw frame (1); The drive unit (4) is a drive motor arranged at the outer end of the rotating seat (2); A cutting unit (5) is arranged between a rotating seat (2) and a bearing seat (3), and the cutting unit (5) includes a plurality of mutually parallel saw blades (50). A protective cover (6) is provided on the saw frame (1) and located on the rear side of the cutting unit (5); The saw blade (50) is driven to rotate by the drive unit (4), and the drive shaft of the drive motor passes through the rotating seat (2) and the cutting unit (5) and is rotatably connected to the bearing seat (3) through the connecting bearing.

2. The high-speed circular saw machine according to claim 1, characterized in that, The cutting unit (5) further includes: A bushing (51) is sleeved on the drive shaft of the drive motor and rotates with the rotation of the drive shaft; Spacer sleeve (52), the spacer sleeve (52) having a plurality of spacers and being arranged alternately with a plurality of saw blades (50) on the bushing (51); Multiple saw blades (50) rotate synchronously by driving the bushing (51) through the drive shaft.

3. A high-speed circular saw machine according to claim 2, characterized in that, Also includes: A connecting pipe (7) is arranged on the protective cover (6) and communicates with the inside of the protective cover (6). The length direction of the connecting pipe (7) coincides with the top tangent of the protective cover (6). Waste container (8), the inlet end of the waste container (8) is detachably connected to the connecting pipe (7) by snap-fit; The waste container (8) is connected to the connecting pipe (7).

4. A high-speed circular saw machine according to claim 3, characterized in that: The waste container (8) has a vacuum insulation layer (9) arranged in the wall.

5. A high-speed circular saw machine according to claim 4, characterized in that: An air passage (10) connecting the external environment and the waste container (8) is arranged on the connecting pipe (7).

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