Chipless tapping mechanism for plastic oil tank

Abstract

The invention relates to the technical field of oil tank machining, and provides a plastic oil tank chipless tapping mechanism which comprises a drilling tool, the drilling tool is cylindrical, one end of the drilling tool is a cutting part, the cutting part is provided with at least two first blades and at least two second blades, and the number of the first blades and the number of the second blades are even; the first blades are configured to be arc-shaped protrusions, and the adjacent first blades are arranged at equal intervals. The second blades are configured to be arc-shaped recesses, and the adjacent second blades are arranged at equal intervals; the arc-shaped inner diameter lengths of the first blade and the second blade are both beta, and the arc-shaped heights of the first blade and the second blade are both alpha which is 0.06 lt; alpha / beta lt; and 0.12. By means of the technical scheme, the problems that a large number of plastic chippings are prone to being generated in the cutting and tapping process of the plastic oil tank and are difficult to clean, the hole edge is not smooth enough, and the overall quality of the oil tank is affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of oil tank processing, and in particular to a chipless hole opening mechanism for a plastic oil tank. Background Art

[0002] Traditional plastic fuel tank openings are prone to produce a large amount of plastic debris during the cutting process. These debris not only affect the cleanliness of the working environment, but may also be embedded in the equipment inside or around the fuel tank, causing potential safety hazards and maintenance problems. Because the plastic debris is very small and light, it is very difficult to clean up, especially on the inner wall of the complex shape of the fuel tank, and even additional manual cleaning steps are required, which increases production costs and time. The waste after cutting (such as round or square plastic sheets) often adheres to the surface of the fuel tank due to static electricity or other reasons, making it difficult to remove directly. This not only prolongs the operation time, but may also cause waste residue, affecting the quality of subsequent processes. In order to ensure the smoothness and flatness of the opening edges, secondary processing such as grinding or trimming is usually required, further increasing the complexity and cost of the production process.

[0003] Some companies try to use electric tools to improve cutting efficiency, but they still cannot avoid the generation of debris and the problem of waste adhesion. In addition, the operating accuracy of electric tools is limited, which can easily lead to inconsistent hole sizes or irregular edges. Although laser cutting technology can reduce the generation of debris, the equipment cost is high, and for some types of plastic materials, laser cutting may cause thermal deformation or burning, affecting the overall quality of the fuel tank. The introduction of a dust collection system can reduce the flying of debris to a certain extent, but it still cannot completely solve the problem of waste adhesion, and it also increases the complexity and maintenance cost of the equipment. The use of clamps and fixtures can help stabilize the fuel tank, but in actual operation, the complex fixing structure may limit the operating space and reduce work efficiency. Summary of the invention

[0004] The present invention proposes a chip-free hole opening mechanism for a plastic fuel tank, which solves the problem in the related art that a large amount of plastic debris is easily generated during the cutting and opening process of the plastic fuel tank, which makes it difficult to clean, and the hole edges are not smooth and sharp, thus affecting the overall quality of the fuel tank.

[0005] The technical solution of the present invention is as follows: a chip-free hole-opening mechanism for a plastic oil tank, comprising: A drilling tool, wherein the drilling tool is cylindrical, one end of which is a cutting portion, the cutting portion having at least two first blades and at least two second blades, and the number of the first blades and the second blades is an even number; The first blades are configured as arc-shaped protrusions, and adjacent first blades are arranged at equal intervals; The second blades are configured as arc-shaped recesses, and adjacent second blades are arranged at equal intervals; The arc inner diameter lengths of the first blade and the second blade are both β, and the arc heights are both α, wherein 0.06<α / β<0.12.

[0006] Optionally, the first blade and the second blade are connected in sequence so that the cutting portion is wavy in shape as a whole.

[0007] Optionally, the drilling tool has a barrel cavity; and further comprises: A butt piece is arranged to move relative to the tool, and has a butt portion, and the butt portion is located in the barrel cavity. After the butt piece moves, the butt portion is located in the barrel cavity or extends out of the barrel cavity, and the butt portion is used to butt against the plastic hole cover.

[0008] Optionally, it also includes: The first frame; A connecting member, the connecting member is rotatably and movably arranged relative to the first frame, the drilling tool is arranged on the connecting member, and the abutment member is movably arranged on the connecting member; The baffle is arranged on the first frame and is located in the moving direction of the abutment. After the abutment moves, the baffle abuts against or cancels the abutment with the abutment.

[0009] Optionally, the connecting member is cylindrical, has a hole and a through groove, and the through groove penetrates the connecting member in a radial direction of the connecting member; One end of the abutment is a smooth surface, and is movably arranged in the through slot and rotates with the connecting member.

[0010] Optionally, it also includes: The limit block is annular and movably arranged on the inner wall of the barrel cavity and has an inclined surface. The cutting portion extends toward the limit block, and the diameter of the barrel cavity gradually decreases.

[0011] Optionally, it also includes: An adjusting column is movably arranged on the connecting piece, and one end of the adjusting column is connected to the limiting block.

[0012] Optionally, the inclined surface of the limiting block is elastic and smooth.

[0013] Optionally, the abutment has an installation space inside, the installation space has an opening, the installation space is connected to the outside through the opening, and the opening is located at the axis of the abutment; and further comprising: A light spot emitter is detachably arranged in the installation space and is used to emit light spots, and the light is emitted through the opening.

[0014] Optionally, it also includes: A displacement sensor is arranged on the first frame, located on one side above the abutment, and is used to detect the moving distance of the abutment. The working principle and beneficial effects of the present invention are: In the present invention, the cutting portion of the drilling tool is provided with an even number of arc-shaped protruding first blades and arc-shaped recessed second blades, which are arranged at equal intervals. When cutting the plastic fuel tank, the cylindrical tool rotates at high speed, and the first blade and the second blade contact the plastic material alternately. Due to the arc-shaped design of the blade, the cutting action is not a traditional straight-line cutting, but a progressive cutting action. When the blade cuts into the plastic, the arc-shaped edge gradually tears apart the material fibers, so that the cut plastic does not form discrete debris, but is removed in a continuous strip or sheet shape. This is due to the special arc-shaped profile of the blade and the reasonable spacing between them, which evenly disperses the cutting force and prevents the material from breaking into chips due to excessive instantaneous force. At the same time, 0.06<α / β<0.12, which makes the blade cutting process smoother and more orderly, and promotes the separation of plastic materials in a chip-free or micro-chip manner. It achieves chip-free or micro-chip cutting, avoids debris remaining inside the fuel tank, reduces the cleaning process, effectively reduces the possibility of debris mixing into the fuel during subsequent use of the fuel tank, ensures the cleanliness and smoothness of the fuel delivery system, and greatly improves the manufacturing quality and safety of the fuel tank; it also avoids environmental pollution caused by the generation of debris to the greatest extent, meeting the requirements of green production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention from a first viewing angle; Figure 2 It is a schematic diagram of the structure of the second viewing angle of the present invention; Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at AA; Figure 4 It is a structural schematic diagram of the first drilling tool, the abutment and the connecting member of the present invention; Figure 5 for Figure 4 Schematic diagram of the internal cross-sectional structure; Figure 6 It is a structural schematic diagram of a second drilling tool, abutment and connecting member of the present invention; Figure 7 for Figure 6 Schematic diagram of the internal cross-sectional structure; Figure 8 This is a numerical diagram of α in the present invention; Fig. 9This is a schematic diagram of the β value of the present invention.

[0017] In the figure: 1. drilling tool; 101. cutting part; 102. first blade; 103. second blade; 104. barrel; 2. abutment; 201. abutment; 202. installation space; 203. opening; 3. first frame; 4. rotation drive device; 5. first linear drive member; 7. second frame; 8. second linear drive member; 9. connecting member; 901. channel; 902. through groove; 10. baffle; 11. limit block; 1101. inclined surface; 12. adjustment column; 13. light spot emitter; 14. displacement sensor. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0019] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0020] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] Example 1 like Figure 1-Figure 5 , Figure 8 , Fig. 9As shown, a chipless hole opening mechanism for a plastic oil tank is proposed, wherein the drilling tool 1 is cylindrical, and one end of the drilling tool 1 is a cutting portion 101, wherein the cutting portion 101 has at least two first blades 102 and at least two second blades 103, and the number of the first blades 102 and the second blades 103 is an even number; the first blades 102 are constructed as arc-shaped protrusions, and adjacent first blades 102 are arranged at equal intervals; the second blades 103 are constructed as arc-shaped depressions, and adjacent second blades 103 are arranged at equal intervals; the arc heights of the first blades 102 and the second blades 103 are both α, and the arc inner diameter lengths are both β, wherein 0.06<α / β<0.12.

[0023] In this embodiment, the cutting portion 101 of the drilling tool 1 is provided with an even number of arc-shaped protruding first blades 102 and arc-shaped recessed second blades 103, which are arranged at equal intervals. When cutting the plastic oil tank, the cylindrical tool rotates at high speed, and the first blade 102 and the second blade 103 contact the plastic material alternately. Due to the arc-shaped design of the blade, the cutting action is not a traditional straight-line cutting, but a progressive cutting action. When the blade cuts into the plastic, the arc-shaped edge gradually tears the material fibers, so that the cut plastic does not form discrete debris, but is removed in a continuous strip or sheet shape. This is due to the special arc-shaped profile of the blade and the reasonable spacing between them, which evenly disperses the cutting force and prevents the material from breaking into chips due to excessive instantaneous force. At the same time, 0.06<α / β<0.12 makes the blade cutting process more stable and orderly, and promotes the separation of plastic materials in a chip-free or micro-chip manner.

[0024] Specifically, experimental data reference is provided, and common high-density polyethylene (HDPE) plastic sheets with a thickness of 5mm and a size of 300mm×300mm are selected to simulate the material of plastic oil tanks; multiple sets of special cutting blades are prepared, and the α / β value of each set of blades is different under the same cutting speed, feed speed, and cutting path. When the value is 0.04 (less than 0.06), the debris weight is about: 0.125~0.135 (unit g), the cutting surface has obvious tear marks, and there are many small debris attached; when the value is 0.08 (between 0.06-0.12), the debris weight is about: 0.02~0.04 (unit g), the cutting surface is flat, with only a very small amount of debris, which is almost invisible; when the value is 0.15 (greater than 0.12), the debris weight is about: 0.084~0.092 (unit g), the cutting surface has a rough area, and there are a small amount of large block debris. Electron microscope photos show that the cutting surface in the appropriate range of α / β values ​​is flat and smooth, the material fibers are neatly cut, and there is no obvious damage caused by debris tearing; while the cutting surfaces in other ranges have defects of varying degrees, proving that this ratio range is conducive to chip-free cutting. In summary, achieving chip-free or micro-chip cutting effectively reduces the situation where chips remain inside the fuel tank, reduces the cleaning process, and effectively reduces the possibility of chips mixing into the fuel during subsequent use of the fuel tank, ensuring the cleanliness and smoothness of the fuel delivery system, greatly improving the manufacturing quality and safety of the fuel tank; it also avoids environmental pollution caused by the generation of chips to the greatest extent, meeting the requirements of green production.

[0025] Furthermore, the first blade 102 and the second blade 103 are connected in sequence, so that the cutting portion 101 is wavy in shape as a whole.

[0026] In this embodiment, the first blade 102 and the second blade 103 are connected in sequence in a wave shape. When the cylindrical tool rotates, the wave-shaped cutting part 101 contacts the surface of the plastic oil tank, and its undulating contour can exert a periodically changing cutting force on the plastic. In the process of rotating one circle, the wave crest (first blade 102) first cuts into the material, partially squeezes and cuts the material, and then the trough (second blade 103) follows up to further widen and refine the cutting area, so that the plastic material is deformed and separated along the contour of the blade under the action of this continuous undulating cutting force, rather than being broken into chips. The wavy design strengthens the continuity of the cutting. Compared with the simple arc blade arrangement, it can more efficiently connect the cutting action and increase the cutting speed. At the same time, it can make the edge of the hole after cutting smoother and more regular, reduce the subsequent grinding process, improve production efficiency and product appearance quality, and also reduce the risk of oil tank leakage caused by the rough edge of the hole.

[0027] Furthermore, the drilling tool 1 has a barrel cavity 104; the abutment 2 is arranged to move relative to the tool, and has a abutment portion 201, which is located in the barrel cavity 104. After the abutment 2 moves, the abutment portion 201 is located in the barrel cavity 104 or extends out of the barrel cavity 104, and the abutment portion 201 is used to abut against the plastic hole cover.

[0028] Before preparing to drill a hole in the plastic fuel tank, first move the abutment 201 of the abutment 2 to a suitable position in the barrel cavity 104, and then move the abutment 2 close to the part of the plastic fuel tank to be drilled, until the abutment 201 is tightly against the surface of the fuel tank. At this time, the abutment 201 plays a role of precise positioning, limiting the initial position of the drilling tool 1 relative to the fuel tank, ensuring that the subsequent cutting action can be carried out at the predetermined hole opening position, and avoiding hole opening position deviation, because the drilling tool 1 is rotating and cutting around the point determined by the abutment 201. Precise positioning helps to improve the hole opening accuracy, meet the strict assembly size requirements of the fuel tank manufacturing, ensure that the subsequently installed fuel tank cover is perfectly matched with the hole, reduce quality problems such as poor sealing caused by inaccurate hole opening position, improve the first-time qualified rate of products, and reduce production costs.

[0029] During cutting, the resist 2 is pressed against the oil tank, and the drilling tool 1 rotates at high speed for cutting. The cut hole cover will generate an upward thrust on the resist 2, causing it to rise in the moving direction. When the cutting is completed, the connecting member 9 is driven to move upward, and the inner wall of the barrel cavity 104 needs to be kept smooth. Although it is smooth, the hole cover will still produce a certain friction with the inner wall of the barrel cavity 104 during the process of being cut into the barrel cavity 104, but this friction will not cause the hole cover to produce plastic debris. Since there is a certain friction between the hole cover and the inner wall of the barrel cavity 104, it will rise synchronously with the resist 2. Furthermore, it also includes: a first frame 3; the connecting member 9 is rotatably and movably arranged relative to the first frame 3, the drilling tool 1 is arranged on the connecting member 9, and the resist 2 is movably arranged on the connecting member 9; the baffle 10 is arranged on the first frame 3 and is located in the moving direction of the resist 2. After the resist 2 moves, the baffle 10 abuts against or cancels the abutment with the resist 2.

[0030] In this embodiment, after rising to a certain position, the baffle 10 enters the moving path of the abutment 2 and abuts against the abutment 2. As the connector 9 continues to rise, the baffle 10 gives the abutment 2 an additional vertical thrust, which is transmitted to the cut hole cover through the abutment 201, overcoming the friction between the hole cover and the barrel cavity 104, so that the entire material removal process does not require manual intervention, has a high degree of automation, and significantly improves production efficiency. In addition, the stable material removal process avoids the cut hole cover from remaining or getting stuck in the barrel cavity 104, preventing interference with subsequent hole opening operations and ensuring the continuity and stability of production.

[0031] Specifically, refer to Figure 1-Figure 3The second linear drive member 8 is movably arranged on the second frame. When drilling, the driving end of the second linear drive member 8 moves, driving the first frame 3, the rotation drive device 4, and the first linear drive member 5 to move synchronously to the appropriate position. Further, the first linear drive member 5 moves, driving the rotation drive device 4 to descend. The rotation drive device 4 is connected to the connecting member 9 through a rotating rod, and drives the connecting member 9 to rotate and move up and down. When the hole cover remains in the cylinder cavity 104, the resisting member 2 is pushed up. At this time, the connecting member 9 moves, driving the resisting member 2 to move synchronously close to the baffle 10. The baffle 10 will give the resisting member 2 an additional vertical thrust. This thrust is transmitted to the cut hole cover through the resisting portion 201, overcoming the friction between the hole cover and the cylinder cavity 104, and realizing material unloading.

[0032] Furthermore, the connecting member 9 is cylindrical, having a hole 901 and a through groove 902 , and the through groove 902 penetrates the connecting member 9 in the radial direction of the connecting member 9 ; one end of the abutment 2 is a smooth surface, movably set in the through groove 902 , and rotates with the connecting member 9 .

[0033] In this embodiment, the connecting member 9 is cylindrical and is provided with a hole 901 and a through groove 902. One end of the resisting member 2 is a smooth surface and is placed in the through groove 902. During high-speed rotary cutting, the connecting member 9 drives the drilling tool 1 to rotate, and the resisting member 2 also rotates synchronously. When the tool vibrates due to a slight imbalance caused by uneven mass distribution, the rotating resisting member 2 exerts its effect by virtue of the inertia force generated by its own rotation. Since the resisting member 2 can move flexibly in the through groove 902, it can automatically adjust its position according to the direction and degree of imbalance and the inertia generated by its own rotation, thereby offsetting part of the centrifugal force caused by the uneven mass distribution of the tool and maintaining the dynamic balance of the entire cutting system. It improves the cutting stability, makes the cutting lines smoother and more precise, effectively reduces the corrugations and burrs on the cutting surface, significantly improves the product's hole opening quality, reduces the stress concentration caused by the uneven cutting surface, extends the service life of the fuel tank, and at the same time reduces the subsequent grinding process and saves production costs.

[0034] Furthermore, the limiting block 11 is annular, movably disposed on the inner wall of the barrel cavity 104, and has an inclined surface 1101. The cutting portion 101 extends toward the limiting block 11, and the diameter of the barrel cavity 104 gradually decreases.

[0035] In this embodiment, the limit block 11 is annular and movably arranged on the inner wall of the barrel cavity 104. It has an inclined surface 1101. As the cutting portion 101 extends toward the limit block 11, the diameter of the barrel cavity 104 gradually decreases. During the cutting process, when the cut hole cover moves toward the inside of the barrel cavity 104, it will contact the inclined surface 1101 of the limit block 11. The setting of the inclined surface 1101 changes the force direction of the hole cover, so that it is subjected to the upward cutting thrust while also being subjected to the component force in the direction of the oblique limit block 11, thereby being limited within a certain range, preventing it from excessively penetrating into the barrel cavity 104 or shaking at will, and assisting in maintaining the stability of the cutting process. It helps to stabilize the cut hole cover, prevent it from moving around and affecting the cutting process, ensure that the cutting action can be completed smoothly and orderly, reduce the cutting deviation caused by the displacement of the hole cover, and improve the accuracy and quality of the hole opening.

[0036] Furthermore, the inclined surface of the limiting block 11 is elastic and smooth.

[0037] In this embodiment, the inclined surface of the limit block 11 is elastic and smooth. During cutting, the hole cover contacts the elastic inclined surface, and the inclined surface will deform appropriately according to the pressure applied by the hole cover, giving the hole cover a soft and stable support force, further stabilizing the position of the hole cover; and the smooth surface characteristics make the friction between the hole cover and the inclined surface extremely small, and almost no debris will be generated, ensuring the cleanliness of the cutting environment and preventing debris from affecting subsequent cutting actions. The elastic inclined surface not only ensures the stability of the hole cover, but also prevents it from being damaged due to excessive extrusion, maintaining the integrity of the hole cover; the smooth surface eliminates the generation of debris, reduces the cleaning process, maintains the cleanliness of the cutting system, improves product quality and production efficiency, and prevents debris from mixing into the fuel and causing safety hazards.

[0038] Furthermore, the displacement sensor 14 is disposed on the first frame 3 , located on one side above the abutment 2 , and is used to detect the moving distance of the abutment 2 .

[0039] In this embodiment, the displacement sensor 14 is mounted on the first frame 3 and is located on one side above the resist 2. During the cutting process, when the resist 2 moves due to the thrust of the hole cover, the displacement sensor 14 monitors in real time the movement distance of the resist 2 relative to its initial position. By capturing these displacement data, the control system can determine the cutting process, such as whether the cutting is completed, or issue an alarm in time when abnormal displacement occurs and adjust the cutting parameters. Real-time monitoring of the cutting process is achieved, cutting anomalies are discovered in time, product scrapping due to cutting failures is prevented, the controllability and safety of the production process are improved, the consistency of product quality is ensured, and it is helpful for enterprises to implement intelligent production management. Example 2 refer to Figure 6 and Figure 7, which is the second embodiment of the present invention, is different from the first embodiment in that: the adjusting column 12 is movably arranged on the connecting member 9, and one end of the adjusting column 12 is connected to the limiting block 11.

[0040] In this embodiment, the function of the adjusting column 12 is to adjust the position of the limit block 11 by moving, wherein the movement of the adjusting column 12 includes but is not limited to: The first type: the adjusting column 12 is threadedly connected to the connecting member 9. After the adjusting column 12 rotates, it rises or falls relative to the connecting member 9, and one end of the adjusting column 12 is rotatably connected to the limit block 11, such as Figure 7 As shown, synchronous movement can be ensured, and the limit block 11 can be a split structure so that the wider end of the adjustment column 12 can be rotatably arranged inside.

[0041] The second method: the adjusting column 12 is rotatably set on the connecting piece 9 and is threadedly connected to the limit block 11. When the adjusting column 12 is rotated, based on the principle of thread transmission, the limit block 11 will move along the inner wall of the barrel cavity 104. If the adjusting column 12 is rotated clockwise, the limit block 11 moves closer to the cutting part 101, reducing the lower space of the barrel cavity 104; counterclockwise rotation is the opposite. By accurately controlling the rotation angle and number of turns of the adjusting column 12, the position of the limit block 11 can be accurately adjusted, thereby controlling the cutting depth. The third type: the adjusting column 12 is movably set on the connecting piece 9, and one end is also connected to the limit block 11. By moving the adjusting column 12, the limit block 11 is directly driven to move. A plurality of slots can be set on the adjusting column, and a movable pin is synchronously set on the connecting piece 9. The pin is plugged into the slot to realize that after the adjusting column 12 moves to the specified position, the limit block is driven to fix the position.

[0042] You can choose one of the above methods, depending on the actual processing environment and other factors.

[0043] Because the limit position of the hole cover moving into the barrel cavity 104 is restricted by the limit block 11, the drilling depth can be precisely regulated to meet the requirements of the drilling depth of oil tanks of different specifications and models, improve the versatility and adaptability of the equipment, and can cope with diversified production needs without frequent replacement of tools or other components, thereby reducing equipment costs and debugging time.

[0044] Furthermore, the resisting member 2 has an installation space 202 inside, the installation space 202 has an opening 203, the installation space 202 is connected to the outside through the opening 203, and the opening 203 is located at the axis of the resisting member 2; it also includes: a light spot emitter 13, which is detachably arranged in the installation space 202 and is used to emit light spots, and its light is emitted through the opening 203.

[0045] In this embodiment, the light spot emitter 13 is detachably installed in the installation space 202 inside the resist 2, and the light is emitted through the opening 203. Before the drilling operation, the light spot emitter 13 is turned on, and the light spot is projected onto the surface of the oil tank. The operator compares and calibrates the position of the light spot with the pre-set drilling position mark to accurately determine the initial position of the resist 2 and the drilling tool 1. Since the light spot emitter 13 is enclosed inside the resist 2, it is less affected by external collisions, oil stains, etc. during the cutting process. It provides an accurate and convenient positioning auxiliary means to improve the drilling positioning accuracy and reduce human positioning errors. At the same time, the internal installation method enhances the durability of the light spot emitter 13, reduces the frequency of equipment maintenance, and ensures the continuous and stable production.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A chipless hole-opening mechanism for a plastic oil tank, characterized in that: include: A drilling tool (1), the drilling tool (1) being cylindrical, one end of which being a cutting portion (101), the cutting portion (101) having at least two first blades (102) and at least two second blades (103), and the number of the first blades (102) and the second blades (103) being an even number; The first blades (102) are configured as arc-shaped protrusions, and adjacent first blades (102) are arranged at equal intervals; The second blades (103) are configured as arc-shaped recesses, and adjacent second blades (103) are arranged at equal intervals; The arc heights of the first blade (102) and the second blade (103) are both α, and the arc inner diameter lengths are both β, wherein 0.06<α / β<0.

12.

2. A chipless hole-opening mechanism for a plastic oil tank according to claim 1, characterized in that: The first blade (102) and the second blade (103) are connected in sequence, so that the cutting portion (101) is wavy in shape as a whole.

3. A chipless hole-opening mechanism for a plastic oil tank according to claim 1 or 2, characterized in that: The drilling tool (1) has a barrel cavity (104); and further comprises: A butt piece (2), the butt piece (2) is arranged to move relative to the tool, and has a butt portion (201), the butt portion (201) is located in the barrel cavity (104), after the butt piece (2) moves, the butt portion (201) is located in the barrel cavity (104) or extends out of the barrel cavity (104), and the butt portion (201) is used to butt against the plastic hole cover.

4. A chipless hole-opening mechanism for a plastic oil tank according to claim 3, characterized in that: Also includes: A first frame (3); A connecting member (9), the connecting member (9) is rotatably and movably arranged relative to the first frame (3), the drilling tool (1) is arranged on the connecting member (9), and the abutment member (2) is movably arranged on the connecting member (9); A baffle (10) is arranged on the first frame (3) and is located in the moving direction of the abutment (2); after the abutment (2) moves, the baffle (10) abuts against or cancels the abutment with the abutment (2).

5. A chipless hole-opening mechanism for a plastic oil tank according to claim 4, characterized in that: The connecting member (9) is cylindrical and has a hole (901) and a through groove (902), wherein the through groove (902) penetrates the connecting member (9) in a radial direction of the connecting member (9); One end of the abutment member (2) is a smooth surface, and is movably disposed in the through groove (902) and rotates along with the connecting member (9).

6. A chipless hole-opening mechanism for a plastic oil tank according to claim 5, characterized in that: Also includes: The limit block (11) is annular and movably arranged on the inner wall of the barrel cavity (104), and has an inclined surface (1101). The cutting portion (101) extends toward the limit block (11), and the diameter of the barrel cavity (104) gradually decreases.

7. A chipless hole-opening mechanism for a plastic oil tank according to claim 6, characterized in that: Also includes: An adjusting column (12) is movably arranged on the connecting member (9), and one end of the adjusting column (12) is connected to the limiting block (11).

8. A chipless hole-opening mechanism for a plastic oil tank according to claim 7, characterized in that: The inclined surface of the limiting block (11) is elastic and is a smooth surface.

9. A chipless hole-opening mechanism for a plastic oil tank according to claim 3, characterized in that: The abutment member (2) has an installation space (202) inside, the installation space (202) has an opening (203), the installation space (202) is connected to the outside through the opening (203), and the opening (203) is located at the axis of the abutment member (2); and further comprises: A light spot emitter (13) is detachably arranged in the installation space (202) and is used to emit light spots, the light of which is emitted through the opening (203).

10. A chipless hole-opening mechanism for a plastic oil tank according to claim 3, characterized in that: Also includes: A displacement sensor (14), the displacement sensor (14) is arranged on the first frame (3), located on one side above the abutment (2), and is used to detect the movement distance of the abutment (2).

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