Automatic heat dissipation thick blade for plate shearing machine

Abstract

An automatic heat dissipation thick blade for a plate shearing machine belongs to the technical field of mechanical cutters and comprises a blade body, heat dissipation holes are formed in the blade body and are in a raindrop shape or an oval shape, transition fillets are arranged on the edges of the heat dissipation holes, blind holes and through holes are flexibly selected according to working conditions, the depth of the blind holes is controlled to be 50%-70% of the thickness of the blade body, and a conical channel is formed. Reinforcing ribs are arranged at the bottom, venturi contraction structures are arranged in the through holes, airflow is accelerated, and the heat dissipation efficiency is improved. Different areas of the blade are differentially perforated to match the temperature gradient. Paraffin or graphene composite phase change materials are injected into the through holes, and temperature rise is delayed. The porosity of the heat dissipation holes is adjusted according to the temperature gradient to maintain heat dissipation balance. The edge of the heat dissipation hole is subjected to shot peening strengthening to improve the fatigue strength.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical cutting tool technology, specifically relating to a thick blade for a shearing machine with automatic heat dissipation. Background Technology

[0002] Shearing machine blades are cutting tools mounted on shearing machines, primarily used to apply shearing force to metal sheets of various thicknesses, causing them to break and separate to the required dimensions. Shearing machine blades typically consist of a moving upper blade and a fixed lower blade, achieving their shearing function through a properly spaced blade gap.

[0003] When shearing sheet metal, the blades of a shearing machine generate a significant amount of heat due to friction and impact. If this heat cannot be dissipated in time, the blade temperature will continue to rise, eventually leading to overheating and damage. Effective heat dissipation helps reduce blade temperature and extend its lifespan.

[0004] Existing heat dissipation methods are generally air cooling or water cooling. A water cooling circulation device or a flame cooling device is installed outside the shearing machine to dissipate heat from the shearing machine blades. This heat dissipation method requires additional heat dissipation equipment. Summary of the Invention

[0005] To address the problem of needing additional heat dissipation equipment on existing shearing machine blades, this invention proposes an automatically heat-dissipating thick blade for shearing machines to solve the aforementioned problem.

[0006] A thick blade for an automatic heat dissipation shearing machine, comprising a blade body and a fixing part;

[0007] The heat dissipation part is located below the fixing part;

[0008] The heat dissipation holes are formed along the surface of the heat dissipation part in a honeycomb array or an alternating diamond array, and the heat dissipation holes are blind holes or through holes;

[0009] The blade portion is located below the heat dissipation portion.

[0010] Furthermore, the heat dissipation hole is teardrop-shaped or elliptical, and the edges of the heat dissipation hole are provided with transition rounded corners.

[0011] Beneficial effects: The heat dissipation holes are teardrop-shaped or elliptical, and the streamlined edges can reduce the stress concentration coefficient. The transition rounded corners at the edges of the heat dissipation holes avoid stress concentration caused by abrupt right angles, which can lead to cracks. The stress is evenly distributed to the area around the holes.

[0012] Furthermore, the raindrop-shaped streamlined structure with a pointed front and rounded rear reduces airflow resistance, allowing the airflow to form laminar rather than turbulent flow within the holes, thus improving convective heat dissipation efficiency. The elliptical holes, through their symmetrical structure, balance stress distribution and avoid stress concentration.

[0013] Furthermore, when setting heat dissipation holes on the shearing machine blades, whether or not to penetrate them needs to be comprehensively weighed based on specific working conditions, heat dissipation requirements, and structural strength requirements.

[0014] Furthermore, when the working scenario requires high precision / high strength, such as shearing hardened steel or composite materials, and it is necessary to prioritize ensuring the rigidity of the cutting edge, blind holes should be selected for heat dissipation.

[0015] Furthermore, when the heat dissipation hole is a blind hole, the depth of the heat dissipation hole is 50% to 70% of the thickness of the blade body, the diameter of the heat dissipation hole decreases from the surface of the blade body into the hole to form a conical blind hole, the bottom of the heat dissipation hole is hemispherical, and a reinforcing rib is provided at the bottom of the heat dissipation hole.

[0016] Beneficial effects: The tapered blind hole, with its diameter gradually decreasing from the surface inward, can significantly reduce the stress concentration factor at the hole edge, making the maximum stress received by the tapered blind hole less than that of the traditional straight hole;

[0017] Furthermore, the aperture gradually narrows to form a tapered channel, allowing heat to be conducted to the non-working side through the hole wall, while the hemispherical bottom expands the heat dissipation area.

[0018] The bottom retains reinforcing ribs to transfer local stress peaks from the blind hole edge to the bottom reinforcing area, reducing the risk of crack propagation, while retaining a thicker matrix to resist warping deformation caused by temperature gradients.

[0019] The depth of the blind hole is set between 50% and 70% of the thickness of the blade body, so that heat can be quickly transferred to both sides of the blade through the hole wall and the bottom substrate, forming a dual-channel heat dissipation of radiation and heat conduction.

[0020] During the machining process, a machining depth of 50% to 70% of the blade body thickness is within the safe range for drilling or laser machining, ensuring controllable precision and minimizing cost increases while maintaining quality.

[0021] Furthermore, if the depth of the blind hole exceeds 70% of the blade thickness, the remaining blade body will be too thin. This will cause the blade to undergo plastic deformation under shear load during operation due to insufficient remaining thickness. At the same time, stress will be concentrated at the bottom edge of the heat dissipation hole, making the bottom edge of the heat dissipation hole a weak point, which is prone to fatigue cracks during use.

[0022] Furthermore, if the depth of the blind hole exceeds 70% of the insert thickness, the drill bit is prone to penetration during machining, resulting in uneven thickness of the substrate. At the same time, when the depth is greater than 70% of the insert thickness, it further increases machining time, exacerbates tool wear, and greatly increases machining costs.

[0023] Furthermore, if the blind hole depth is less than 50% of the blade thickness, heat will need to travel a longer path to reach the non-working side of the blade, resulting in low heat dissipation efficiency.

[0024] Furthermore, when cutting high thermal conductivity materials, such as copper, aluminum, or thick plates with a thickness of ≥6mm, and when rapid heat dissipation is required through forced convection, through holes should be selected for heat dissipation.

[0025] Furthermore, when the heat dissipation hole is a through hole, the edge of the heat dissipation hole is treated with double chamfering, and a Venturi contraction structure is provided inside the heat dissipation hole.

[0026] Beneficial effects: A Venturi constriction structure is incorporated inside the heat dissipation holes. During the shearing process, the airflow is accelerated. The middle section of the channel constricts, reducing the diameter to 50%-70% of the hole diameter, further accelerating the airflow. According to Bernoulli's principle, the increased flow velocity leads to a decrease in local pressure, drawing in more cool air and improving heat dissipation efficiency. The edges of the heat dissipation holes are treated with a double chamfer: 30° on the outer side and 45° on the inner side. The 30° chamfer on the outer side guides the airflow in, while the 45° chamfer on the inner side accelerates the outflow, utilizing the pressure difference to enhance convection.

[0027] Furthermore, the holes can be differentiated according to the different usage areas of the blade. For example, the heat dissipation holes in the high-temperature zone are through holes, the heat dissipation holes in the low-temperature zone are blind holes, and the through holes with gradually changing diameters are set in the transition zone between the high-temperature and low-temperature zones to match the temperature gradient and balance heat dissipation and structural strength.

[0028] When the heat dissipation hole is a through hole, paraffin or graphene composite phase change material is injected into the heat dissipation hole on the non-working side of the blade body 1; the paraffin or graphene composite phase change material is used to absorb and temporarily store heat, thus delaying the temperature rise.

[0029] The porosity of the heat dissipation holes on the surface of the heat dissipation part 3 near the blade is 40%, and the porosity of the heat dissipation holes on the surface of the heat dissipation part 3 away from the blade is 25%.

[0030] Beneficial effects: The cutting edge area has the highest temperature during blade cutting. The dense array of holes helps increase the heat dissipation area and quickly dissipate heat. The temperature is lower in areas away from the cutting edge. Reducing the number of openings preserves the material strength of the blade body 1 while maintaining overall heat dissipation balance.

[0031] The diameter of the heat dissipation holes is 3mm-5mm, and the spacing between the heat dissipation holes is 1.2-1.5 times the diameter of the holes.

[0032] The edges of the heat dissipation holes are shot peened to strengthen them; residual compressive stress is introduced to improve fatigue strength.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. Optimize the shape and edge treatment of the heat dissipation holes to improve heat dissipation and structural strength:

[0035] Raindrop-shaped or elliptical ventilation holes and their streamlined edges reduce stress concentration, prevent cracks caused by abrupt right-angle changes, and improve convective heat dissipation efficiency. The application of transition fillets further disperses stress, enhances the overall structural strength of the blade, and reduces some structural strength within acceptable limits to achieve better heat dissipation performance.

[0036] 2. Flexible selection of blind holes and through holes to adapt to different working conditions:

[0037] Depending on the specific operating conditions, heat dissipation requirements, and structural strength requirements, blind holes or through holes can be flexibly selected. Blind holes are suitable for high-precision / high-strength applications. Through the use of tapered blind holes, hemispherical bottoms, and reinforcing ribs, stress concentration is effectively reduced, heat dissipation efficiency is improved, and structural strength is ensured. Through holes are suitable for cutting high thermal conductivity materials or thick plates, enabling rapid heat dissipation through forced convection.

[0038] 3. Differentiated opening strategy balances heat dissipation and structural strength:

[0039] Different opening methods are adopted according to the temperature differences in different areas of the blade. For example, through holes are used in high temperature areas, blind holes are used in low temperature areas, and through holes with gradually changing diameters are set in transition areas, so as to achieve a balance between heat dissipation and structural strength.

[0040] 4. Application of special materials to improve heat dissipation performance:

[0041] Injecting paraffin or graphene composite phase change materials into the through-holes can absorb and temporarily store heat, effectively slowing down the temperature rise and further improving the heat dissipation performance of the blade.

[0042] 5. Porosity differences and strengthening treatments extend the service life of cutting tools:

[0043] The heat dissipation holes closer to the cutting edge have higher porosity, which facilitates rapid heat dissipation; the holes further away from the cutting edge have lower porosity, preserving the material strength of the blade body. Simultaneously, the edges of the heat dissipation holes undergo shot peening, introducing residual compressive stress and improving the fatigue strength of the blade, thereby extending its service life. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1A schematic diagram of a thick blade for an automatic heat dissipation shearing machine;

[0046] Figure 2 A front view of a thick blade for an automatic heat dissipation shearing machine;

[0047] Figure 3 for Figure 2 aa sectional view when the heat dissipation holes are blind holes;

[0048] Figure 4 for Figure 2 Sectional view aa when the heat dissipation holes are through holes;

[0049] Figure 5 for Figure 4 Enlarged view of section A in the middle.

[0050] In the picture:

[0051] 1. Blade body;

[0052] 2. Fixing holes;

[0053] 3. Heat dissipation section;

[0054] 4. Blade section;

[0055] 5. Heat dissipation holes;

[0056] 6. Heat dissipation coating;

[0057] 7. Reinforcing ribs. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0059] The application principle of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0060] Example 1

[0061] like Figure 1-2 The diagram shows a thick blade for a shearing machine with automatic heat dissipation, comprising a blade body 1, which includes a fixing part;

[0062] Heat dissipation part 3, which is located below the fixing part;

[0063] Heat dissipation holes 5 are provided along the surface of the heat dissipation part 3 in a honeycomb array or an alternating diamond array, and the heat dissipation holes 5 are blind holes or through holes;

[0064] The blade portion 4 is located below the heat dissipation portion 3.

[0065] Furthermore, the heat dissipation hole 5 is teardrop-shaped or elliptical, and the edges of the heat dissipation hole 5 are provided with transition rounded corners.

[0066] Beneficial effects: The heat dissipation hole 5 is teardrop-shaped or elliptical. The streamlined edge can reduce the stress concentration coefficient. The edge of the heat dissipation hole 5 is set with a transition rounded corner to avoid stress concentration caused by abrupt right angle, which may lead to cracks. The stress is evenly distributed to the area around the hole.

[0067] Furthermore, the raindrop-shaped streamlined structure with a pointed front and rounded rear reduces airflow resistance, allowing the airflow to form laminar rather than turbulent flow within the holes, thus improving convective heat dissipation efficiency. The elliptical holes, through their symmetrical structure, balance stress distribution and avoid stress concentration.

[0068] Example 2

[0069] Based on Example 1, such as Figure 3 As shown, when heat dissipation holes 5 are set on the shearing machine blade, whether or not to penetrate them needs to be comprehensively weighed based on the specific working conditions, heat dissipation requirements and structural strength requirements.

[0070] Furthermore, when the working scenario requires high precision / high strength, such as shearing hardened steel or composite materials, and it is necessary to prioritize ensuring the rigidity of the cutting edge, heat dissipation hole 5 is selected as a blind hole.

[0071] Furthermore, when the heat dissipation hole 5 is a blind hole, the depth of the heat dissipation hole 5 is 50% to 70% of the thickness of the blade body 1, the diameter of the heat dissipation hole 5 decreases from the surface of the blade body 1 into the hole to form a conical blind hole, the bottom of the heat dissipation hole 5 is hemispherical, and the bottom of the heat dissipation hole 5 is provided with reinforcing ribs.

[0072] Beneficial effects: The tapered blind hole, with its diameter gradually decreasing from the surface inward, can significantly reduce the stress concentration factor at the hole edge, making the maximum stress received by the tapered blind hole less than that of the traditional straight hole;

[0073] Furthermore, the aperture gradually narrows to form a tapered channel, allowing heat to be conducted to the non-working side through the hole wall, while the hemispherical bottom expands the heat dissipation area.

[0074] The bottom retains reinforcing rib 7, which transfers the local stress peak from the edge of the blind hole to the bottom reinforcing area, reducing the risk of crack propagation. At the same time, it retains a thicker matrix, which can resist warping deformation caused by temperature gradient.

[0075] The depth of the blind hole is set between 50% and 70% of the thickness of the blade body 1, so that heat can be quickly transferred to both sides of the blade through the hole wall and the bottom substrate, forming a dual-channel heat dissipation of radiation and heat conduction.

[0076] During the machining process, a machining depth of 50% to 70% of the thickness of the blade body 1 is within the safe range for drilling or laser machining, ensuring controllable precision and minimizing cost increase while guaranteeing quality.

[0077] Furthermore, if the depth of the blind hole exceeds 70% of the blade thickness, the remaining blade body will be too thin. This will cause the blade to undergo plastic deformation under shear load during operation due to insufficient remaining thickness. At the same time, stress will be concentrated at the bottom edge of the heat dissipation hole 5, making the bottom edge of the heat dissipation hole 5 a weak point, which is prone to fatigue cracks during use.

[0078] Furthermore, if the depth of the blind hole exceeds 70% of the insert thickness, the drill bit is prone to penetration during machining, resulting in uneven thickness of the substrate. At the same time, when the depth is greater than 70% of the insert thickness, it further increases machining time, exacerbates tool wear, and greatly increases machining costs.

[0079] Furthermore, if the depth of the blind hole is less than 50% of the blade thickness, heat will have to be conducted to the non-working side of the blade through a longer path, resulting in low heat dissipation efficiency.

[0080] Example 3

[0081] Based on Example 1, such as Figure 4-5 As shown, when cutting high thermal conductivity materials, such as copper, aluminum, or thick plates with a thickness of ≥6mm, and when rapid heat dissipation is required through forced convection, heat dissipation hole 5 is selected as a through hole.

[0082] Furthermore, when the heat dissipation hole 5 is a through hole, the edge of the heat dissipation hole 5 is treated with double chamfering, and the interior of the heat dissipation hole 5 is provided with a Venturi contraction structure.

[0083] Beneficial effects: A Venturi constriction structure is installed inside the heat dissipation hole 5. During the shearing process, the airflow is accelerated. The middle section of the channel constricts, reducing the diameter to 50%-70% of the hole diameter, which accelerates the airflow. According to Bernoulli's principle, the increased flow velocity leads to a decrease in local pressure, drawing in more cool air and improving heat dissipation efficiency. The edges of the heat dissipation hole 5 are treated with double chamfering: 30° on the outer side and 45° on the inner side. The 30° chamfer on the outer side guides the airflow in, while the 45° chamfer on the inner side accelerates the outflow, utilizing the pressure difference to enhance convection.

[0084] Furthermore, the holes can be differentiated according to the different usage areas of the blade. For example, the heat dissipation hole 5 in the high temperature zone is a through hole, the heat dissipation hole 5 in the low temperature zone is a blind hole, and the through hole with a gradually changing diameter is set in the transition zone between the high temperature zone and the low temperature zone to match the temperature gradient and balance heat dissipation and structural strength.

[0085] When the heat dissipation hole 5 is a through hole, paraffin or graphene composite phase change material is injected into the heat dissipation hole 5 on the non-working side of the blade body 1; the paraffin or graphene composite phase change material is used to absorb and temporarily store heat, thus delaying the temperature rise.

[0086] The porosity of the heat dissipation holes 5 provided on the surface of the heat dissipation part 3 near the blade part 4 is 40%, and the porosity of the heat dissipation holes 5 provided on the surface of the heat dissipation part 3 away from the blade part 4 is 25%.

[0087] Beneficial effects: The cutting edge area has the highest temperature during blade cutting. The dense array of holes helps increase the heat dissipation area and quickly dissipate heat. The temperature is lower in areas away from the cutting edge. Reducing the number of openings preserves the material strength of the blade body 1 while maintaining overall heat dissipation balance.

[0088] The diameter of the heat dissipation hole 5 is 3mm-5mm, and the spacing between the holes of the heat dissipation hole 5 is 1.2 times-1.5 times the diameter of the hole.

[0089] The edges of the heat dissipation holes 5 are shot peened to strengthen them; residual compressive stress is introduced to improve fatigue strength, and a heat dissipation coating 6 is sprayed inside the heat dissipation holes 5.

[0090] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0091] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A self-cooled thick blade for a plate shearing machine, characterized by: The blade body (1) comprises a fixed part; A heat dissipation part (3) is located below the fixed part; A heat dissipation hole (5) is arranged in a honeycomb array or staggered diamond array on the surface of the heat dissipation part (3), and the heat dissipation hole (5) is a blind hole or a through hole; A blade edge part (4) is located below the heat dissipation part (3).

2. An automatically cooled thick blade for a plate shearing machine according to claim 1, characterized in that: The heat dissipation hole (5) is in the shape of a raindrop or an ellipse, and a transition fillet is arranged on the edge of the heat dissipation hole (5).

3. The self-cooled thick blade for a plate shearing machine according to claim 1, wherein: When the heat dissipation hole (5) is a blind hole, the depth of the heat dissipation hole (5) is 50%-70% of the thickness of the blade body (1), the hole diameter of the heat dissipation hole (5) decreases from the surface of the blade body (1) to the inside of the hole, and the bottom of the heat dissipation hole (5) is semispherical.

4. The self-cooled thick blade for a plate shearing machine according to claim 3, wherein: When the heat dissipation hole (5) is a blind hole, a reinforcing rib is arranged at the bottom of the heat dissipation hole (5).

5. The self-cooled thick blade for a plate shearing machine according to claim 1, wherein: When the heat dissipation hole (5) is a through hole, the edge of the heat dissipation hole (5) is double chamfered, and a Venturi contraction structure is arranged inside the heat dissipation hole (5).

6. The self-cooled thick blade for a plate shearing machine according to claim 4, wherein: When the heat dissipation hole (5) is a through hole, paraffin or graphene composite phase change material is injected into the heat dissipation hole (5) on the non-working side of the blade body (1).

7. The self-cooled thick blade for a plate shearing machine according to claim 1, wherein: The porosity of the heat dissipation hole (5) arranged on the surface of the side of the heat dissipation part (3) close to the blade edge part (4) is 40%, and the porosity of the heat dissipation hole (5) arranged on the surface of the side of the heat dissipation part (3) away from the blade edge part (4) is 25%.

8. The self-cooled thick blade for a plate shearing machine according to claim 6, wherein: The hole diameter of the heat dissipation hole (5) is 3mm-5mm, and the hole spacing of the heat dissipation hole (5) is 1.2-1.5 times the hole diameter.

9. The self-cooled thick blade for a plate shearing machine according to claim 1, wherein: The edge of the heat dissipation hole (5) is subjected to shot peening strengthening treatment.

Images