A grooving machine and a grooving method applied to the grooving machine

Abstract

The present invention discloses a milling groove machine, which comprises a tool rest body, a working mechanism, a pressurizing mechanism and a supporting mechanism; the working mechanism is located at the bottom of the milling groove machine; the pressurizing mechanism is connected to both the supporting mechanism and the working mechanism; the supporting mechanism is used to provide a support point for the pressurizing mechanism on the groove wall of the milled groove, so that the pressurizing mechanism applies a downward pressure to the working mechanism; the supporting mechanism includes at least a pair of support plates, one or more first tensioning devices, and each pair of support plates is arranged on opposite sides; each first tensioning device has at least a pair of relatively movable hinge points, and each pair of hinge points is connected to at least a pair of support plates, and the first tensioning device is used to drive each pair of support plates to open or retract through each pair of relatively movable hinge points. Through the present invention, a good pressurizing effect and further deviation correction effect are achieved during the milling groove process.

Description

Technical Field

[0001] The present invention relates to the technical field of grooving operations, and particularly to a grooving machine and a grooving method applied to the grooving machine. Background Art

[0002] The grooving machine mainly includes a tool rest body and a working device, etc. The working device is installed below the tool rest body. The grooving machine usually performs grooving operations in a way of being suspended by a steel wire rope, and applies pressure to the working device through the weight of the tool rest body. Since the steel wire rope cannot apply downward pressure, when the specifications of the main machine are fixed, the weight of the grooving machine is limited and cannot apply sufficient pressure to the working device.

[0003] When the grooving machine works in a hard rock formation, especially when the working device uses a button bit milling wheel, a very large downward pressure is required. If the weight of the tool rest body is simply increased, the main machine will become very bulky, resulting in a substantial increase in the overall cost of the machine. Summary of the Invention

[0004] The purpose of the present invention is to provide a grooving machine that can effectively pressurize the working device.

[0005] The technical solution provided by the present invention is as follows:

[0006] The present invention discloses a grooving machine, which includes:

[0007] A tool rest body, a working mechanism, a pressurizing mechanism, and a supporting mechanism;

[0008] The working mechanism is located at the bottom of the grooving machine;

[0009] The pressurizing mechanism is simultaneously connected to the supporting mechanism and the working mechanism;

[0010] The supporting mechanism is used to provide a support point for the pressurizing mechanism on the groove wall of the groove, so that the pressurizing mechanism applies a downward pressure to the working mechanism;

[0011] The supporting mechanism includes at least a pair of support plates and one or more first tensioning devices,

[0012] Each pair of the support plates is arranged on opposite sides;

[0013] Each of the first tensioning devices has at least a pair of relatively movable hinge points, and each pair of the hinge points is connected to at least a pair of the support plates. The first tensioning device is used to drive each pair of the support plates to open or retract through each pair of relatively movable hinge points.

[0014] Preferably, the first tensioning device is connected to the support plate through a support arm;

[0015] One end of the support arm is connected to the hinge point of the first tensioning device, and the other end of the support arm is connected to the support plate.

[0016] Preferably, the movement direction of the first tensioning device is the vertical direction, and the support arm is arranged at an angle with the movement direction of the first tensioning device.

[0017] Preferably, the angle is 5° - 70°.

[0018] Preferably, the first tensioning device is a support oil cylinder;

[0019] The hinge points are respectively arranged on one side of the cylinder block of the support oil cylinder and one side of the piston rod of the support oil cylinder, and the support arm is hinged at the hinge points.

[0020] Preferably, the support mechanism includes a pair of support plates;

[0021] A pair of support arms are hinged on the hinge point on one side of the cylinder block of the support oil cylinder, and the pair of support arms are respectively connected to the pair of support plates;

[0022] Another pair of support arms are hinged on the hinge point on one side of the piston rod of the support oil cylinder, and the pair of support arms are respectively connected to the pair of support plates;

[0023] The two pairs of support arms are installed back to back or facing each other in a V shape.

[0024] Preferably, the support mechanism further includes a limit pull rod, and both ends of the limit pull rod are respectively hinged on a pair of support plates, and are used for limiting the opening amplitude of the support arms on one side of the cylinder block and one side of the piston rod of the support oil cylinder.

[0025] Preferably, the pressing mechanism includes a second tensioning device, and the second tensioning device has two relatively movable hinge points, one hinge point is connected to the support mechanism, and the other hinge point is connected to the working mechanism or the tool rest body.

[0026] Preferably, the second tensioning device is a pressing oil cylinder, one side of the pressing oil cylinder is hinged to the support mechanism, and the other side is hinged to the working mechanism.

[0027] Preferably, one hinge point of the second tensioning device is connected to the support mechanism through a pulley assembly;

[0028] The pulley assembly includes a steel wire rope and a pulley, the pulley is installed on the tool rest body, one end of the steel wire rope is connected to one hinge point of the second tensioning device, and the steel wire rope is connected to the support mechanism after passing over the pulley.

[0029] Preferably, at least one support block is hinged to one of the hinge points of the first tensioning device, and the support block is limited in a sliding groove on the tool rest body;

[0030] The extending direction of the sliding groove is consistent with the advancing direction of the working mechanism.

[0031] Preferably, there is a gap between the support block and the sliding groove, and the size of the gap is 1-100 mm.

[0032] Preferably, the support block is located at the central position between a pair of the support plates.

[0033] Preferably, a pair of the support blocks are hinged to one of the hinge points of the first tensioning device, and the pair of support blocks are respectively arranged on both sides of the hinge point, and the pair of support blocks are connected by a rotating shaft, and the rotating shaft is arranged through the hinge point.

[0034] Preferably, the milling groove machine further includes:

[0035] A deviation rectifying mechanism installed on the upper part of the tool rest body;

[0036] The deviation rectifying mechanism includes at least one retractable deviation rectifying plate, and the deviation rectifying plate is arranged on the same side as the support plate.

[0037] Preferably, the distance between the deviation rectifying plate and the rotating shaft is greater than the distance between the rotating shaft and the working mechanism.

[0038] Preferably, the distance between the deviation rectifying plate and the rotating shaft is 1-5 times the distance between the rotating shaft and the working mechanism.

[0039] Preferably, the tool rest body includes an installation frame, and the installation frame is arranged close to the working mechanism, and the pressurizing mechanism and the supporting mechanism are integrated on the installation frame.

[0040] The present invention also provides a grooving method for using the milling groove machine as described above:

[0041] Using the working device installed at the bottom of the tool rest body to mill and excavate the rock and soil to form a groove hole;

[0042] The supporting mechanism is fixed on the groove wall through the support plate;

[0043] The pressurizing mechanism applies a downward pressure to the working device by means of the support of the support plate to improve the milling ability of the working device;

[0044] Wherein, the support mechanism includes the first tensioning device, and the first tensioning device drives the support plate to open or retract through a relatively movable hinge point.

[0045] Preferably, the support block guides the tool rest body to prevent the milling slot machine from skewing during the milling slot process.

[0046] Preferably, by means of the deviation correction plate, when the milling slot machine skews during the milling slot process, the tool rest body is pushed to rotate around the support block through the deviation correction plate to achieve deviation correction.

[0047] A milling slot machine provided by the present invention can bring at least one of the following beneficial effects:

[0048] 1. Most milling slot machines operate in a suspended state, and it is very difficult to directly apply pressure to the working mechanism (milling wheel). The present invention adds a pressurizing mechanism and also sets up a support mechanism. Moreover, a supporting force point is found for the pressurizing mechanism on the groove wall of the milling slot through the support mechanism. Then, with the support of this force point, the pressurizing mechanism can apply pressure to the working mechanism at the other end, and the design is very ingenious.

[0049] 2. The present invention drives the support arm through the first tensioning device to realize the expansion and contraction of the support device. When the expansion and contraction direction of the support arm forms an angle with the movement direction of the first tensioning device, due to the conversion of force, fewer oil cylinders, that is, less force, can be used to achieve stable support. Preferably, the movement direction of the first tensioning device is the vertical direction, and a pair of support arms are respectively hinged on the cylinder side and the piston rod side of the first tensioning device, and the two pairs of support arms are installed back to back or face to face in a V shape, that is, the extending direction of each support arm forms an angle with the movement direction of the first tensioning device. The range of this angle can be selected as 5° - 70°. In this way, the power in the movement direction of the first tensioning device is decomposed into the extending direction of the support arm, and a greater force will be obtained, which can more conveniently push the support plate to open.

[0050] 3. The present invention also sets the first tensioning device at the middle position of the tool rest. On the one hand, the support block hinged on the first tensioning device can guide the tool rest body and reduce the possible skew of the tool rest body during the milling slot process. On the other hand, after the tool rest body skews during the milling slot process, the support block can be used as a support point, and the tool rest body is pushed to rotate around the support block through the deviation correction plate located on the upper part of the tool rest body to correct. Since the distance from the deviation correction plate to the support block is much greater than the distance from the milling wheel to the support block, preferably, the ratio of this distance is 1 - 5 times. Therefore, the deviation correction plate can use a small thrust to push the tool rest body to rotate, and correspondingly, the deviation correction plate can also be made smaller.

[0051] 4. On the other hand, the second tensioning device pressurizes the tool rest body through a steel wire rope and a pulley, which can make the placement position of the pressurizing oil cylinder more flexible. For example, the second tensioning device can be placed inside the tool rest body. On the one hand, this can effectively protect the second tensioning device. On the other hand, it can make the pressurizing assembly more compact and applicable to construction in a smaller space.

[0052] 5. Due to the relatively large degree of freedom in the support scheme of the present invention, it is possible that the support arm on one side of the cylinder body of the first tensioning device (such as the support oil cylinder) opens first, or it is also possible that the support arm on the piston rod side opens first. To prevent the opening angle of the support arms on both sides from being too large, the present invention also adds at least one limiting pull rod, and both ends of the limiting pull rod are hinged on the left and right support plates respectively. Brief Description of the Drawings

[0053] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of the milling machine, the milling cutter for the milling machine, and the damping method in a clear and understandable manner in combination with the drawings.

[0054] Figure 1 Structural schematic diagram of an embodiment of the milling machine;

[0055] Figure 2 Schematic diagram of an embodiment when the support mechanism is in a contracted state;

[0056] Figure 3 Schematic diagram of an embodiment when the support mechanism is in a supported state;

[0057] Figure 4 For Figure 3 B - B sectional view of

[0058] Figure 5 Schematic diagram of an embodiment when the pressurizing mechanism completes a pressurizing stroke;

[0059] Figure 6 For Figure 3 Exploded view of the support mechanism in

[0060] Explanation of the reference numerals in the drawings:

[0061] 1 - Milling machine, 11 - Tool rest body, 12 - Deviation rectifying plate, 13 - Working mechanism, 14 - Milling wheel, 15 - Installation frame, 20 - Pressurizing assembly, 21 - Support plate, 22 - Support oil cylinder, 23 - Support oil cylinder body, 24 - Support oil cylinder piston rod, 25 - Support arm, 26 - Pulley, 27 - Steel wire rope, 30 - Pressurizing oil cylinder, 31 - Pressurizing oil cylinder body, 32 - Pressurizing oil cylinder piston rod, 35 - Support block, 50 - Sliding groove. Detailed Embodiment

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other embodiments can be obtained.

[0063] To make the drawings concise, only the parts related to the present invention are schematically shown in each drawing, and they do not represent their actual structures as products.

[0064] As Figure 1 shown, the present invention provides a milling groove machine 1, which includes a tool rest body 11, two working devices 13, a pressurizing mechanism, and a supporting mechanism. Among them, the two working devices 13 form a working mechanism, and the pressurizing mechanism and the supporting mechanism together form a pressurizing assembly 20 in the figure. The working device 13 is installed at the bottom of the milling groove machine. The pressurizing mechanism is connected to both the supporting mechanism and the working device 13 at the same time, or is connected to both the supporting mechanism and the installation frame integrated with the working device 13 at the same time. The supporting mechanism includes a pair of support plates 21, which are arranged on opposite sides in pairs and are respectively located on both sides of the installation frame 15. Refer to Figures 2-5 , the supporting mechanism further includes two first tensioning devices, that is, two support cylinders 22. One hinge point is provided on each side of the cylinder body and the piston rod of each support cylinder 22, and the two hinge points can move relative to each other. Each hinge point of the two first tensioning devices is connected to a pair of support plates 21 at the same time.

[0065] Referring to the figure, the support cylinders 22 are arranged along the extension direction of the tool rest body 11 and are located at the middle position between the two support plates 21. Each support cylinder 22 mainly includes a support cylinder body 23 and a support cylinder piston rod 24. Two support arms 25 are hinged on each support cylinder body 23, and two support arms 25 are hinged on each support cylinder piston rod 24. The other ends of the 8 support arms 25 are respectively hinged on the two support plates 21.

[0066] The moving direction of the support cylinder 22 is the vertical direction, that is, the extension direction of the tool rest body, or can be the advancing direction of the working device. The support arm 25 and the moving direction of the support cylinder 22 are arranged at an angle, and the angle range is 5°-70°, for example, it can be 20°, 30°, 45°, 50°, 60°, etc. Since the telescopic direction of the support arm forms an angle with the moving direction of the support cylinder, due to the conversion of force, when the force of the cylinder is converted to the support arm, the force can become larger, so that fewer cylinders, that is, less force, can be used to achieve stable support.

[0067] On each side of the support cylinder 22, the two support arms 25 at one hinge point and the two support arms 25 at the other hinge point are installed in a V-shaped back-to-back manner, or they can be installed in a V-shaped face-to-face manner. By the telescoping of the support cylinder 22, the opening or retraction of the 4 support arms 25 is driven, and then the opening or retraction of the support plate 21 is driven.

[0068] The 4 support arms 25 hinged to each support cylinder 22 are installed in a V-shaped back-to-back manner. The support of the support plate 21 can be realized by one support cylinder 22. When the opening angle between the two support arms 25 at the same hinge point is relatively large, the device can magnify the thrust of the support cylinder 22 by a multiple, and convert the thrust direction of the support cylinder 22 from the direction along the tool rest to the direction perpendicular to the tool rest and act on the support plate 21. Therefore, the present invention can use fewer and smaller support cylinders 22 to realize the opening and retraction of the support plate 21.

[0069] Due to the relatively large number of degrees of freedom in the support scheme of the present invention, it is possible that the support arm on one side of the cylinder body of the first tensioning device (such as a support cylinder) opens first, or it is possible that the support arm on the piston rod side opens first. In order to prevent the opening angle of the support arm on either side from being too large, the present invention also adds at least one limit tie rod. Both ends of the limit tie rod are hinged to the left and right support plates respectively. On one side of the cylinder body of each support cylinder, there is a pair of support arms, and on the piston rod side, there is a pair of support arms. The maximum distance between the two hinge points of the limit tie rod is less than the hinge point distance between each pair of support arms 25. The limit tie rod can ensure that when the support plate opens to the maximum extent, the opening angle between the two support arms at the same hinge point does not exceed 180 degrees.

[0070] See Figures 2-6 , the pressurizing mechanism includes 4 pressurizing cylinders 30, 4 pulleys 26, and 4 steel wire ropes 27. The pulleys 26 are fixed to the upper part of the mounting frame 15. One end of the pressurizing cylinder 30 is hinged to the bottom of the mounting frame 15, and the other end is hinged to one end of the steel wire rope 27 wound around the pulley 26. The other end of the steel wire rope 27 is hinged to the support plate 21. The pressurizing cylinder 30 is located inside the mounting frame 15. On the one hand, it can well protect the pressurizing cylinder 15, and on the other hand, it can effectively reduce the width of the entire pressurizing assembly 20, so as to meet the construction of narrower slots. In this embodiment, the pressurizing cylinder plays the role of a tensioning device. In other embodiments, the tensioning device can also be other structures capable of providing power. In this embodiment, the pressurizing cylinder is connected to the support plate and the mounting frame through the steel wire rope and the pulley. In other embodiments, for a simpler structure, the pressurizing cylinder can also be directly connected to the support plate and the mounting frame. In this embodiment, one end of the pressurizing cylinder is connected to the mounting frame. Here, the mounting frame serves as the carrier for the pressurizing cylinder to apply pressure to the milling wheel. In other embodiments, the pressurizing cylinder can also be connected to the milling wheel or other power carriers.

[0071] Such as Figure 2As shown, the support plate 21 is in a contracted state at this time. During operation, as Figure 3 shown, the support oil cylinder 22 extends to push the support plate 21 to support on the groove wall, and then the contraction of the pressurizing oil cylinder 30 drives the steel wire rope 27 to apply a downward pulling force on the pulley 26, thereby realizing the pressurization of the working device 13. At the same time, a long hole for avoiding the support arm 25 is designed on the side plate of the installation frame 15, which can ensure that the installation frame 15 does not interfere with the support arm 25 when sliding up and down.

[0072] Two support blocks 35 are respectively hinged on the hinge points above each support oil cylinder 22. The support blocks 35 are installed in the sliding groove 50 at the middle position of the installation frame 15. There is a small gap between the support blocks 35 and the sliding groove 50, and the size of this gap is 1 - 100 mm, preferably 5 - 20 mm. And the extending direction of the sliding groove is consistent with the advancing direction of the working mechanism, that is, the milling wheel, so as to limit the moving direction of the support block to be consistent with the advancing direction of the milling wheel. The support block plays a guiding role to achieve the effect of partial deviation correction. After the support plate supports on the groove wall, the support block 35 is in a fixed state. As the pressurizing oil cylinder 30 contracts, the milling groove machine 1 feeds downward, and the support block 35 can well guide the milling device 1, so as to prevent the working device 13 from deflecting as much as possible when milling the groove.

[0073] The support block 35 is located at the central position between a pair of support plates 21, and a pair of support blocks 35 are connected by a rotating shaft, and this rotating shaft passes through the hinge point above the support oil cylinder 22. On the other hand, two deviation correction plates 12 are respectively installed at the front and rear of the upper part of the tool rest body. The deviation correction plates 12 can perform telescopic actions. The two deviation correction plates 12 are arranged on the same side as a pair of support plates 21. After the milling groove action is deflected, the corresponding deviation correction plate 12 can be extended, and with the groove wall as the support, the whole tool rest body is pushed to rotate with the support block 35 as the hinge point. When the deviation correction plates are in an open state, the deviation correction plates are supported by the groove wall of the milling groove, and the overall structure of the milling groove machine rotates around the rotating shaft connecting a pair of support blocks 35 and rotates to a position parallel to the extending direction of the groove wall supported by the deviation correction plates. The telescoping of the deviation correction plates can be manually controlled, and the inclination of the tool rest body can be measured by an inclination sensor.

[0074] Since the distance from the deviation correction plate 12 to the support block 35 is much greater than the distance from the milling wheel 14 to the support block 35, preferably, the ratio of this distance is 1 - 5 times. Therefore, a relatively small thrust of the deviation correction plate 12 can realize a relatively large lateral force on the milling wheel 14, so that the milling wheel 14 can effectively and quickly mill off the redundant groove wall, and thus it is easy to return the tool rest body to the ideal position.

[0075] The aforementioned installation frame 15 is arranged close to the working mechanism milling wheel, and the pressurizing mechanism and the support mechanism are integrated on the installation frame 15, making the overall structure more compact.

[0076] When the pressurizing cylinder 30 is fully retracted, a pressurizing and pushing process is completed, and then the supporting cylinder 22 is retracted, the corresponding supporting plate 21 is retracted, the pressurizing cylinder 30 is extended, and the supporting plate 21 slides downward under the action of its own gravity until the pressurizing cylinder 30 is completely extended. Then the supporting cylinder 22 is extended to support the supporting plate 21 on the groove wall, and the next pressurizing and pushing process is carried out.

[0077] The present invention also provides a slotting method used by the aforementioned slot milling machine:

[0078] A working device installed at the bottom of the tool holder body is used to mill rock and soil to form a slot; the supporting mechanism is fixed to the slot wall through a supporting plate; the pressurizing mechanism applies a downward pressure to the working device with the support of the supporting plate to enhance the milling capacity of the working device; wherein the supporting mechanism includes a first tensioning device, which drives the supporting plate to open or retract via a relatively movable hinge.

[0079] Most slot milling machines operate in mid-air, and it is difficult to directly apply pressure to the working mechanism (milling wheel). The present invention adds a pressurizing mechanism and also sets a supporting mechanism. The supporting mechanism finds a supporting point for the pressurizing mechanism on the slot wall of the milling slot, and then the pressurizing mechanism can pressurize the working mechanism at the other end with the support of the supporting point. The design is very clever.

[0080] The more preferred effect of the present invention is to further achieve the effect of correcting the deviation through the support block and the correcting plate. On the one hand, the support block that can only move in the vertical direction can be used to guide the tool holder body to prevent the slot milling machine from being deflected during the slot milling process. On the other hand, the correcting plate can be used to push the tool holder body to rotate around the support block when the slot milling machine is deflected during the slot milling process, thereby further correcting the deviation, thereby ensuring the slot milling operation with high vertical precision.

[0081] The telescoping of the support device of the present invention is achieved by driving the support arm with a support oil cylinder, which can achieve stable support with fewer oil cylinders. At the same time, the support oil cylinder is located at the middle position of the tool rest. On the one hand, the support block hinged on the support oil cylinder can guide the tool rest body, reducing the possible deflection of the tool rest body during the milling groove process. On the other hand, after the tool rest body deflects during the milling groove process, the support block can serve as a support point. A pair of support blocks are both located between a pair of support plates, and the rotation axis between the pair of support blocks is located at the central position between the pair of support plates. The extending direction of the rotation axis is located on the central plane between the pair of support plates. It is corrected by pushing the tool rest body to rotate around the support block through the deviation correction plate located on the upper part of the tool rest body. Since the distance from the deviation correction plate to the support block is much greater than the distance from the milling wheel to the support block. Therefore, the deviation correction plate can push the tool rest body to rotate with a small thrust, and correspondingly, the deviation correction plate can be made smaller. On the other hand, the pressurizing oil cylinder pressurizes the tool rest body through a steel wire rope, which can make the placement position of the pressurizing oil cylinder more flexible. For example, the pressurizing oil cylinder can be placed inside the tool rest body. In this way, on the one hand, the pressurizing oil cylinder can be effectively protected, and on the other hand, the pressurizing assembly can be made more compact, which is applicable to construction in a smaller space.

[0082] It should be noted that the above embodiments can be freely combined according to needs. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A milling slot machine, characterized in that, Comprising: Tool rest body, working mechanism, pressing mechanism and supporting mechanism; The working mechanism is located at the bottom of the milling groove machine; The pressing mechanism is connected to both the supporting mechanism and the working mechanism simultaneously; The supporting mechanism is used to provide a support point for the pressing mechanism on the groove wall of the milled groove, so that the pressing mechanism applies a downward pressure to the working mechanism; The supporting mechanism includes at least a pair of support plates and one or more first tensioning devices, Each pair of the support plates is arranged on opposite sides; Each of the first tensioning devices has at least a pair of relatively movable hinge points, and each pair of the hinge points is connected to at least a pair of the support plates. The first tensioning device is used to drive each pair of the support plates to open or retract through each pair of relatively movable hinge points; The first tensioning device is connected to the support plate through a support arm; One end of the support arm is connected to the hinge point of the first tensioning device, and the other end of the support arm is connected to the support plate; The pressing mechanism includes a second tensioning device, and the second tensioning device has two relatively movable hinge points. One hinge point is connected to the supporting mechanism, and the other hinge point is connected to the working mechanism or the tool rest body; At least one support block is hinged on one of the hinge points of the first tensioning device, and the support block is limited in a sliding groove on the tool rest body; The extending direction of the sliding groove is consistent with the advancing direction of the working mechanism; The milling groove machine further includes a deviation rectifying mechanism installed on the upper part of the tool rest body; The deviation rectifying mechanism includes at least one telescopic deviation rectifying plate, and the deviation rectifying plate is arranged on the same side as the support plate; 2. The milling slot machine according to claim 1, characterized in that: The moving direction of the first tensioning device is the vertical direction, and the support arm is arranged at an angle with the moving direction of the first tensioning device; 3. The milling slot machine according to claim 2, characterized in that: The angle is 5° - 70°; 4. The milling slot machine according to claim 1, characterized in that, The first tensioning device is a support oil cylinder; Hinge points are respectively arranged on one side of the cylinder body of the support oil cylinder and one side of the piston rod of the support oil cylinder, and the support arm is hinged at the hinge point; 5. The milling slot machine according to claim 4, characterized in that, The supporting mechanism includes a pair of support plates; A pair of support arms is hinged on the hinge point on one side of the cylinder body of the support oil cylinder, and the pair of support arms is connected to the pair of support plates one by one; Another pair of support arms is hinged on the hinge point on one side of the piston rod of the support oil cylinder, and the pair of support arms is connected to the pair of support plates one by one; The two pairs of support arms are installed back to back or face to face in a V shape; 6. The milling slot machine according to claim 4 or 5, characterized in that, The supporting mechanism further includes a limit pull rod, and both ends of the limit pull rod are respectively hinged on a pair of support plates, and are used to limit the opening amplitude of the support arms on one side of the cylinder body and one side of the piston rod of the support oil cylinder; 7. The milling slot machine according to claim 1, characterized in that: The second tensioning device is a pressing oil cylinder, one side of the pressing oil cylinder is hinged to the supporting mechanism, and the other side is hinged to the working mechanism; 8. The milling slot machine according to claim 1 or 7, characterized in that: One hinge point of the second tensioning device is connected to the supporting mechanism through a pulley assembly; The pulley assembly includes a steel wire rope and a pulley. The pulley is installed on the tool rest body. One end of the steel wire rope is connected to one hinge point of the second tensioning device, and after the steel wire rope passes over the pulley, it is connected to the supporting mechanism.

9. The milling slot machine according to claim 1, characterized in that: There is a gap between the support block and the sliding groove, and the size of the gap is 1-100 mm.

10. The milling slot machine according to claim 1, characterized in that: The support block is located at the central position between a pair of the support plates.

11. The milling slot machine according to claim 10, characterized in that: A pair of support blocks are hinged on one of the hinge points of the first tensioning device, and the pair of support blocks are arranged on both sides of the hinge point, and the pair of support blocks are connected by a rotating shaft, and the rotating shaft is arranged through the hinge point.

12. The milling slot machine according to claim 11, characterized in that: The distance between the deviation rectifying plate and the rotating shaft is greater than the distance between the rotating shaft and the working mechanism.

13. The milling slot machine according to claim 12, characterized in that: The distance between the deviation rectifying plate and the rotating shaft is 1-5 times the distance between the rotating shaft and the working mechanism.

14. The milling slot machine according to claim 1, characterized in that: The tool rest body includes a mounting frame, and the mounting frame is arranged close to the working mechanism, and the pressurizing mechanism and the support mechanism are integrated on the mounting frame.

15. A grooving method for the milling slot machine according to any one of claims 1-14: Using the working mechanism installed at the bottom of the tool rest body to mill and excavate the rock and soil to form a slot hole; The support mechanism is fixed on the slot wall through the support plate; The pressurizing mechanism applies a downward pressure to the working mechanism with the support of the support plate to improve the milling ability of the working mechanism; Wherein, The support mechanism includes the first tensioning device, and the first tensioning device drives the support plates to open or retract through a relatively movable hinge point.

16. The grooving method according to claim 15, characterized in that: At least one support block is hinged on one of the hinge points of the first tensioning device, and the support block is limited in the sliding groove on the tool rest body; The extending direction of the sliding groove is consistent with the advancing direction of the working mechanism; The support block is located at the central position between a pair of the support plates; A pair of support blocks are hinged on one of the hinge points of the first tensioning device, and the pair of support blocks are arranged on both sides of the hinge point, and the pair of support blocks are connected by a rotating shaft, and the rotating shaft is arranged through the hinge point; With the help of the support block, the tool rest body is guided to prevent the milling slot machine from being deflected during the milling slot process.

17. The grooving method according to claim 16, characterized in that: A deviation rectifying mechanism is installed on the upper part of the tool rest body of the milling slot machine; The deviation rectifying mechanism includes at least one retractable deviation rectifying plate, and the deviation rectifying plate is arranged on the same side as the support plate; With the help of the deviation rectifying plate, when the milling slot machine is deflected during the milling slot process, the tool rest body is pushed to rotate around the support block through the deviation rectifying plate to realize deviation rectification, so as to ensure the milling slot operation with high vertical precision.

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