Polishing device for mechanical part machining

Abstract

The utility model relates to a polishing device for mechanical part machining, and belongs to the technical field of mechanical part machining equipment. The polishing device comprises a negative pressure generating pipe, a protective cover, an air suction pipe and a dust collecting bag, the negative pressure generating pipe is communicated with an air outlet formed in the side wall of an angle grinder, and the protective cover is arranged on the outer side of a polishing piece installed on the angle grinder in a covering mode; one end of the air suction pipe communicates with the negative pressure generation pipe, the other end of the air suction pipe communicates with the protective cover, and the dust collection bag is detachably connected to the end, away from the angle grinder, of the negative pressure generation pipe; the technical problems that in the prior art, a filter screen is blocked by dust, air circulation is reduced, and an angle grinder is damaged due to overheating can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical parts processing equipment, in particular to a grinding device for mechanical parts processing. Background Art

[0002] After machining mechanical parts, especially large castings used in molds, it is difficult to accurately chamfer and deburr the corners at the junction of the casting surface and the machining surface by direct machining because the casting surface has low precision. In order to improve the utilization rate of machine tools, benchworkers often use handheld angle grinders to grind machining residues, flash and burrs.

[0003] The existing patent with publication number CN217728267U discloses a new type of lithium-electric angle grinder, including a body and a head, a turbine part is arranged between the body and the head, and the turbine part is provided with an air outlet and an air inlet; a grinding disc is installed on the head, a heat dissipation and dust absorption shell is arranged outside the grinding disc, and the heat dissipation and dust absorption shell is provided with a lower air intake and an air injection part, the lower air intake is connected to the air inlet, and the air injection part is connected to the air outlet, and a filter is arranged at the air inlet of the turbine part; barrier nets are arranged at the lower air intake and the air intake of the dust suction head.

[0004] The prior art has the following problems:

[0005] There is no device to intuitively judge the air permeability of the filter. When the filter absorbs a large amount of dust and causes the air permeability to decrease or be lost, the turbine part cannot enter the air, which will cause the internal overheating of the angle grinder and damage. Utility Model Content

[0006] The utility model provides a grinding device for machining mechanical parts, which can solve the technical problem in the prior art that a filter screen is blocked by dust, resulting in reduced air circulation and causing overheating and damage to an angle grinder.

[0007] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0008] The present application provides a grinding device for machining mechanical parts, which includes a negative pressure generating pipe, a protective cover, an air suction pipe and a dust collecting bag. The negative pressure generating pipe is connected to an air outlet opened on the side wall of an angle grinder, and the protective cover is arranged on the outside of a grinding plate installed on the angle grinder. One end of the air suction pipe is connected to the negative pressure generating pipe, and the other end is connected to the protective cover. The dust collecting bag is detachably connected to one end of the negative pressure generating pipe away from the angle grinder.

[0009] Through the above technical solution, the airflow blown out from the air outlet of the angle grinder forms negative pressure at the air intake port in the negative pressure generating pipe and then sucks dust through the protective cover. The dust finally enters the dust bag with the blown airflow. By sensing the air outlet of the dust bag, it can be known whether the dust bag needs to be replaced, thereby avoiding overheating and damage of the angle grinder caused by dust blockage.

[0010] In the utility model, the grinding device further comprises a one-way valve, which is installed in the negative pressure generating tube and arranged close to the angle grinder, and the one-way valve allows air to enter the negative pressure generating tube from the air outlet in one direction.

[0011] Through the above technical solution, a one-way valve is used to prevent the dust in the negative pressure generating pipe and the dust collecting bag from flowing back into the angle grinder, thereby improving the safety of the angle grinder.

[0012] In the present invention, the polishing device further comprises a spiral diaphragm, which is connected to the negative pressure generating tube and is located between the one-way valve and the dust collecting bag.

[0013] Through the above technical solution, a spiral spacer is used to make the airflow in the negative pressure generating tube blow out in a spiral manner, and the dust and air are separated by centrifugal force, which reduces the impact force of the dust blowing into the dust bag and is more conducive to the cleaning and reuse of the dust bag.

[0014] In the utility model, the above-mentioned grinding device also includes a first connecting half ring and a second connecting half ring, the first connecting half ring is connected to one end of the negative pressure generating tube facing the angle grinder, the second connecting half ring is connected to the first connecting half ring to form a ring with a U-shaped cross-section and is slidably connected to the outside of the air outlet, and an annular channel is formed between the first connecting half ring, the second connecting half ring and the outer wall of the angle grinder.

[0015] Through the above technical solution, the first connecting half ring and the second connecting half ring are slidably connected to the outer wall of the angle grinder, which facilitates the adjustment of the angle of the negative pressure generating tube and increases the adaptability of the grinding areas of different parts.

[0016] In the utility model, the grinding device further comprises black corundum, which is connected to the bottom surface of the shield in a lifting manner. After the black corundum is raised, its end surface abuts against the working surface of the grinding sheet.

[0017] Through the above technical solution, the black corundum connected by lifting is used to clean the powder adhered to the working area of ​​the grinding sheet to improve the working efficiency of the grinding sheet.

[0018] In the present invention, the grinding device further comprises a rubber pad connected to the end of the black corundum away from the grinding sheet, and the rubber pad is connected to the bottom surface of the shield.

[0019] Through the above technical solution, the rubber pad is used to improve the comfort when pressing the black corundum, while avoiding high temperature burns to the operator caused by friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 An axonometric view of a grinding device for machining mechanical parts provided by an embodiment of the utility model;

[0022] Figure 2 A cross-sectional view of a grinding device for machining mechanical parts provided by an embodiment of the utility model Figure 1 ;

[0023] Figure 3 A cross-sectional view of a grinding device for machining mechanical parts provided by an embodiment of the utility model Figure 2 ;

[0024] Figure 4 An exploded view of a grinding device for machining mechanical parts provided by an embodiment of the utility model;

[0025] Figure 5 An assembly diagram of a partial structure of a grinding device for machining mechanical parts provided by an embodiment of the utility model;

[0026] Figure 6 An assembly diagram of a protective cover and black corundum provided in an embodiment of the utility model;

[0027] Figure 7 A cross-sectional view of a shield and black corundum provided in an embodiment of the utility model;

[0028] Figure 8 A schematic diagram of a working state of a grinding device for machining mechanical parts provided by an embodiment of the utility model;

[0029] Fig. 9 A schematic diagram of another working state of a grinding device for machining mechanical parts provided in an embodiment of the utility model.

[0030] Icons: 1-negative pressure generating tube; 101-one-way valve; 102-spiral diaphragm; 103-dust bag; 110-first connecting half ring; 111-second connecting half ring; 112-sealing rubber ring; 2-protective cover; 201-black corundum; 202-rubber pad; 203-spring; 204-installation cylinder; 3-intake pipe; 4-angle grinder; 401-air outlet; 402-grinding disc; 403-trachea joint; 501-retaining wall; 502-processing surface. DETAILED DESCRIPTION

[0031] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0032] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be welding, bolt connection, or riveting; it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] Example

[0036] Please refer to Figure 1-Figure 9 , Figure 1-Figure 9 An embodiment of the present application is shown.

[0037] This embodiment provides a grinding device for machining mechanical parts, such as Figures 1 to 3As shown, it includes a negative pressure generating tube 1, a protective cover 2, an air intake pipe 3 and a dust collecting bag 103. The negative pressure generating tube 1 is connected to an air outlet 401 opened on the side wall of the angle grinder 4. The protective cover 2 is arranged on the outside of a grinding plate 402 installed on the angle grinder 4. The air intake pipe 3 is connected to the side wall of the negative pressure generating tube 1. The air intake pipe 3 connects the negative pressure generating tube 1 with the protective cover 2. The dust collecting bag 103 is detachably connected to one end of the negative pressure generating tube 1 away from the angle grinder 4 through threads.

[0038] When in use, the compressed air pipeline of the factory is connected through the air pipe joint 403 and the air pipe hose. The compressed air drives the angle grinder 4 to rotate, and then the gas is discharged through the air outlet 401. The exhausted gas enters the negative pressure generating tube 1 and forms a negative pressure at the pipe mouth of the air intake pipe 3. The pressure difference sucks the gas near the protective cover 2 and the dust generated by the grinding disc 402 into the protective cover 2 and blows it into the negative pressure generating tube 1 through the air intake pipe 3. The gas mixed with dust is blown out in the negative pressure generating tube 1 away from the angle grinder 4 under the blowing of the air discharged from the air outlet 401, and the dust is filtered out of the air through the cloth dust collecting bag 103.

[0039] It should be noted that the negative pressure generating tube 1 can also be an auxiliary handle of the angle grinder 4 for holding with both hands.

[0040] Through the above technical solution, the airflow blown out from the air outlet 401 of the angle grinder 4 forms negative pressure at the air intake pipe 3 in the negative pressure generating tube 1 and then absorbs dust through the protective cover 2. The dust finally enters the dust collecting bag 103 with the blown airflow. By sensing the air outlet of the dust collecting bag 103, it can be known whether the dust collecting bag 103 needs to be replaced, thereby avoiding overheating and damage of the angle grinder 4 caused by dust blockage.

[0041] As a preferred embodiment, the grinding device further includes a one-way valve 101. Figure 3 As shown, the one-way valve 101 is clamped on one end of the negative pressure generating tube 1 facing the angle grinder 4 , and the one-way valve 101 allows air to enter the negative pressure generating tube 1 from the air outlet 401 .

[0042] When in use, start the angle grinder 4, and compressed gas enters from the air pipe joint 403, passes through the inside of the angle grinder 4 and is blown out from the air outlet 401. Then the airflow opens the one-way valve 101 and enters the negative pressure generating pipe 1. After closing the angle grinder 4, the one-way valve 101 is closed, and dust cannot flow back into the angle grinder 4.

[0043] It should be noted that if Figure 5 As shown, the one-way valve 101 is composed of multiple rubber flaps. When opened, the rubber flaps move away from each other to enlarge the opening. When closed, the rubber flaps abut against each other to close the opening.

[0044] Through the above technical solution, the one-way valve 101 is used to prevent the dust in the negative pressure generating tube 1 and the dust collecting bag 103 from flowing back into the angle grinder 4, thereby improving the safety of the angle grinder 4.

[0045] As a preferred implementation method, Figure 3 and Figure 5 As shown, the grinding device further includes a spiral spacer 102 , which is welded inside the negative pressure generating tube 1 .

[0046] During use, the air mixed with dust enters the spiral spacer 102 and then performs a spiral motion. Because the dust has a greater specific gravity, the dust will gradually be adsorbed on the side wall of the negative pressure generating tube 1 under the action of the centrifugal force of the spiral motion, thereby reducing the amount of dust directly entering the dust bag 103. The dust in the negative pressure generating tube 1 is actively cleaned by inverted shaking, and then the dust bag 103 is directly replaced. This can increase the single working time of the grinding device.

[0047] It should be noted that the dust brought out directly by the blowing of compressed air will get stuck in the mesh of the dust bag 103, which will make the cleaning of the dust bag 103 more difficult and is not conducive to secondary use.

[0048] Through the above technical solution, a spiral spacer 102 is used to blow the airflow in the negative pressure generating tube 1 out in a spiral manner, and the dust and air are separated by centrifugal force, thereby reducing the impact force of the dust blowing into the dust bag 103, and being more conducive to the cleaning and reuse of the dust bag 103.

[0049] As a preferred implementation method, Figure 4 and Figure 5 As shown, the grinding device further includes a first connecting half ring 110 and a second connecting half ring 111. The first connecting half ring 110 is welded to one end of the negative pressure generating tube 1 facing the angle grinder 4. Figure 2 As shown, the second connecting half ring 111 and the first connecting half ring 110 are connected by screws to form a ring with a U-shaped cross-section and are slidably connected to the outside of the air outlet 401. The first connecting half ring 110, the second connecting half ring 111 and the outer wall of the angle grinder 4 are connected to form an annular air path. The joint of the annular air path is sealed with a sealing rubber ring 112 to improve air tightness.

[0050] When using, Figure 8 As shown, under normal conditions, the negative pressure generating tube 1 and the angle grinder 4 are in Figure 8 In the state shown, the processing surface 502 and the surrounding intersection edges are polished, such as Fig. 9 As shown, when the retaining wall 501 (other casting positions forming a shield in the casting mold cavity) appears, the negative pressure generating tube 1 rotates to Fig. 9 The state shown, and then carry out grinding operation.

[0051] Through the above technical solution, the first connecting half ring 110 and the second connecting half ring 111 are slidably connected to the outer wall of the angle grinder 4, which facilitates the adjustment of the angle of the negative pressure generating tube 1 and increases the adaptability of different parts grinding areas.

[0052] As a preferred implementation method, Figure 6 and Figure 7 As shown, the above-mentioned grinding device also includes black corundum 201, which is connected to the bottom surface of the protective cover 2 by a spring 203 and a mounting tube 204 for lifting and lowering. The mounting tube 204 is threadedly connected to the opening below the protective cover 2. The spring 203 is bonded between the black corundum 201 and the mounting tube 204. After the black corundum 201 is raised, its end face abuts against the working surface of the grinding sheet 402.

[0053] When in use, the spring 203 is not compressed or stretched in a natural state. At this time, the black corundum 201 is in a descending state. When the grinding sheet 402 needs to be cleaned, the black corundum 201 is pressed from bottom to top to make it rise and abut against the grinding sheet 402. After grinding, the black corundum 201 descends under the action of its own weight and the downward pulling force of the spring 203.

[0054] It should be noted that black corundum 201, also known as low-aluminum corundum, is a gray-black crystal with α-Al2O3 and iron spinel as the main mineral phases, which is obtained by smelting bauxite in an electric arc furnace. It is characterized by a low Al2O3 content and a certain amount of Fe2O3 (about 10%). Therefore, it has the characteristics of moderate hardness, high toughness, high temperature resistance, and stable thermal performance. It is mostly used for cleaning oilstones.

[0055] Through the above technical solution, the black corundum 201 connected by lifting is used to clean the powder adhering to the working area of ​​the grinding sheet 402 to improve the working efficiency of the grinding sheet 402.

[0056] As a preferred implementation method, Figure 6 and Figure 7 As shown, the grinding device further includes a rubber pad 202 , which is adhered to the end of the black corundum 201 away from the grinding sheet 402 , and the rubber pad 202 is connected to the bottom surface of the shield 2 .

[0057] When in use, the rotation speed of the grinding sheet 402 is lowered, and then the rubber pad 202 is pressed to push the black corundum 201 upward to abut against the working area of ​​the grinding sheet 402 to remove the attachments in the working area.

[0058] Through the above technical solution, the rubber pad 202 is used to improve the comfort when pressing the black corundum 201, while avoiding high temperature burns to the operator caused by friction.

[0059] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope recorded in the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A grinding device for machining mechanical parts, characterized in that: include: The negative pressure generating tube (1) is connected to the air outlet (401) provided on the side wall of the angle grinder (4); A protective cover (2) is arranged on the outside of a grinding sheet (402) installed on the angle grinder (4); An air intake pipe (3), one end of which is connected to the negative pressure generating pipe (1) and the other end of which is connected to the protective cover (2); The dust collecting bag (103) is detachably connected to an end of the negative pressure generating tube (1) away from the angle grinder (4).

2. The grinding device for machining mechanical parts according to claim 1, characterized in that: Also includes: A one-way valve (101) is installed in the negative pressure generating tube (1) and is arranged close to the angle grinder (4). The one-way valve (101) allows air to enter the negative pressure generating tube (1) from the air outlet (401) in one direction.

3. The grinding device for machining mechanical parts according to claim 2, characterized in that: Also includes: The spiral spacer (102) is connected to the negative pressure generating tube (1) and is located between the one-way valve (101) and the dust collecting bag (103).

4. The grinding device for machining mechanical parts according to claim 3, characterized in that: Also includes: A first connecting half ring (110) connected to one end of the negative pressure generating tube (1) facing the angle grinder (4); The second connecting half ring (111) is connected to the first connecting half ring (110) to form a ring with a U-shaped cross section, and is slidably connected to the outside of the air outlet (401), and an annular channel is formed between the first connecting half ring (110), the second connecting half ring (111) and the outer wall of the angle grinder (4).

5. The grinding device for machining mechanical parts according to claim 4, characterized in that: Also includes: The black corundum (201) is connected to the bottom surface of the protective cover (2) in a lifting manner. After the black corundum (201) is lifted, its end surface abuts against the working surface of the grinding sheet (402).

6. The grinding device for machining mechanical parts according to claim 5, characterized in that: Also includes: A rubber pad (202) is connected to one end of the black corundum (201) facing away from the grinding sheet (402), and the rubber pad (202) is connected to the bottom surface of the protective cover (2).

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