Stepped hole bottom surface grinding device

Abstract

The invention discloses a stepped hole bottom surface grinding device, which comprises an electric drill unit, a grinding unit, a grinding unit, a grinding unit, a grinding unit and a grinding unit, and is characterized in that the electric drill unit is used for clamping and rotating the top end of a clamp body; the positioning column is fixed on the middle part of the clamp body and is matched with the stepped hole; the polishing head is detachably fixed on the clamp body and is positioned below the positioning column; the grinding head is tightly attached to the bottom face of the stepped hole and used for grinding the bottom face of the stepped hole. The electric hand drill switch is turned on, the grinding head is rotated, and the bottom face of the stepped hole is ground; and the coarse gauze grinding head, the fine sandpaper grinding head and the felt grinding head are sequentially replaced, so that the roughness of the bottom surface of the stepped hole is less than or equal to 1.6, and the quality of the shell is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, and in particular to a step hole bottom surface grinding device. Background Art

[0002] A shell part has a step hole on the shell surface. The bottom surface roughness of the step hole is required to be ≤1.6. This surface is a sealing surface and has high requirements.

[0003] In the existing production technology, the stepped hole on the shell surface is processed by milling. Sometimes, due to problems with the material or the structure of the processed parts, the roughness of the bottom surface of the stepped hole exceeds 6.3, which does not meet the requirements.

[0004] In the prior art, the stepped hole on the shell surface is processed by milling. However, due to the structural problems of materials or processed parts, the bottom surface of the stepped hole is rough and the quality is poor. No effective solution has been proposed so far. Summary of the invention

[0005] The present invention provides a step hole bottom surface grinding device to solve the problem that the step hole on the shell surface is processed by milling in the prior art, and the bottom surface of the step hole is rough and of poor quality due to structural problems of materials or processed parts.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a device for grinding the bottom surface of a step hole, which includes: an electric drill unit, used to clamp the top of a clamp body and rotate it; a positioning column, fixed to the middle part of the clamp body and matched with the step hole; a grinding head, detachably fixed to the clamp body and located below the positioning column; the grinding head is in close contact with the bottom surface of the step hole and is used to grind the bottom surface of the step hole.

[0007] Optionally, the electric drill unit includes: a hand electric drill and a drill chuck; the bottom end of the hand electric drill is fixedly connected to the top end of the drill chuck to provide torque for the drill chuck; the drill chuck is used to clamp the clamp body.

[0008] Optionally, the clamp is a cross-shaped structure, including: a horizontal rod and a vertical rod that are fixedly connected; the top end of the vertical rod is clamped in the drill chuck; and the bottom end of the vertical rod is inserted into the step hole.

[0009] Optionally, a positioning hole is provided at the center of the positioning column, which is used to penetrate from the top end of the vertical rod and be fixed to the vertical rod, and the bottom surface of the positioning column is in close contact with the top surface of the cross rod.

[0010] Optionally, the grinding head is provided with a through hole for passing through the bottom end of the vertical rod and being detachably fixed to the cross rod, and the top surface of the grinding head is in close contact with the bottom surface of the cross rod; the bottom surface of the grinding head is in close contact with the bottom surface of the step hole.

[0011] Optionally, the grinding head is fixed to the cross bar via a clamping nut.

[0012] Optionally, a washer is provided between the grinding head and the clamping nut.

[0013] Optionally, the grinding head includes: a coarse gauze grinding head, a fine sandpaper grinding head, and a felt grinding head.

[0014] Optionally, the positioning column is made of non-metallic material.

[0015] Optionally, the clamp body is an integrated structure.

[0016] Beneficial effects of the present invention:

[0017] The present invention provides a step hole bottom surface grinding device, which includes: an electric drill unit, which is used to clamp the top of the clamp body and rotate it; a positioning column, which is fixed on the middle part of the clamp body and matches the step hole; a grinding head, which is detachably fixed on the clamp body and located below the positioning column; the grinding head is in close contact with the bottom surface of the step hole and is used to grind the bottom surface of the step hole. The present invention grinds the bottom surface of the step hole by starting the hand drill switch and rotating the grinding head; and replaces the coarse gauze grinding head, fine sandpaper grinding head, and felt grinding head in sequence, which can ensure that the roughness of the bottom surface of the step hole is ≤1.6, thereby ensuring the quality of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a step hole bottom surface grinding device provided by an embodiment of the present invention;

[0019] Figure 2 is an exploded view of a step hole bottom surface grinding device provided by an embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of the stepped hole structure of the shell provided in an embodiment of the present invention.

[0021] Explanation of symbols:

[0022] Electric hand drill-1, drill chuck-2, clamp body-3, positioning column-4, grinding head-5, washer-6, locking nut-7, housing-8, step hole-9, bottom surface of the step hole-10. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the existing production technology, the stepped hole 9 on the surface of the housing 8 is processed by milling. Sometimes, due to the material or the structure of the processed parts, the roughness of the bottom surface 10 of the stepped hole exceeds 6.3, which does not meet the requirements. Figure 3 Schematic diagram of the structure of the step hole 9 of the housing 8 provided in an embodiment of the present invention. Figure 3 Furthermore, since the space of the bottom surface 10 of the step hole is small, it is difficult to directly grind with sandpaper, and the bottom surface 10 of the step hole cannot be polished to the right position.

[0025] Therefore, the present invention provides a grinding device for the step hole bottom surface 10 that matches the step hole 9, ensuring that the effective grinding area is 100%; Figure 1 1 is a schematic structural diagram of a step hole bottom surface 10 grinding device provided by an embodiment of the present invention; Figure 2 1 is an exploded view of a step hole bottom surface 10 grinding device provided by an embodiment of the present invention; Figure 1 and Figure 2 As shown, the device comprises:

[0026] 1. An electric drill unit, used to clamp the top of the clamp body 3 and rotate it;

[0027] Specifically, the electric drill unit includes: a hand electric drill 1 and a drill chuck 2; the bottom end of the hand electric drill 1 is fixedly connected to the top end of the drill chuck 2 to provide torque for the drill chuck 2; the drill chuck 2 is used to clamp the clamp body 3.

[0028] When the hand drill 1 is switched on, the hand drill 1 provides torque to the drill chuck 2, so that the drill chuck 2 rotates, and the drill chuck 2 clamps the clamp body 3, so that the clamp body 3 also rotates accordingly.

[0029] The clamp body 3 is a cross-shaped structure, comprising: a horizontal rod and a vertical rod that are fixedly connected; the top end of the vertical rod is clamped in the drill chuck 2; and the bottom end of the vertical rod is inserted into the step hole 9. The clamp body 3 is an integrated structure.

[0030] 2. A positioning column 4 is fixed to the middle of the clamp body 3 and matches with the step hole 9;

[0031] Specifically, a positioning hole is provided in the center of the positioning column 4 for passing through the top of the vertical rod to be fixed to the vertical rod, and the bottom surface of the positioning column 4 is closely attached to the top surface of the horizontal rod. The inner surface of the positioning hole is in contact with the outer surface of the vertical rod.

[0032] During specific use, the positioning column 4 is heated, inserted from the top of the vertical rod, placed on the horizontal rod, and fastened to the vertical rod after cooling.

[0033] The positioning column 4 is matched with the stepped hole 9 of the housing 8. In order to avoid damaging the inner surface of the stepped hole 9, the positioning column 4 is made of elastic non-metallic materials such as nylon. The positioning column 4 can also play a centering role.

[0034] 3. A grinding head 5 is detachably fixed on the clamp body 3 and is located below the positioning column 4; the grinding head 5 is in close contact with the bottom surface 10 of the step hole and is used for grinding the bottom surface 10 of the step hole.

[0035] Specifically, the grinding head 5 is provided with a through hole for passing through the bottom end of the vertical rod and being detachably fixed to the horizontal rod, and the top surface of the grinding head 5 is in close contact with the bottom surface of the horizontal rod; the bottom surface of the grinding head 5 is in close contact with the bottom surface 10 of the step hole, and is used for grinding the bottom surface 10 of the step hole. The inner surface of the through hole is in close contact with the outer surface of the vertical rod.

[0036] Further, the grinding head 5 is fixed to the cross bar by a clamping nut 7. That is, the clamping nut 7 is inserted from the bottom end of the vertical rod to fix the grinding head 5 to the cross bar.

[0037] Furthermore, in order to prevent the clamping nut 7 from damaging the grinding head 5 , a washer 6 is provided between the grinding head 5 and the clamping nut 7 .

[0038] The grinding head 5 includes: a coarse cloth grinding head 5 , a fine sandpaper grinding head 5 , and a felt grinding head 5 .

[0039] During the specific grinding process, the coarse gauze grinding head 5 is first used to grind the bottom surface 10 of the step hole. After grinding to the first preset roughness range, the fine sandpaper grinding head 5 is replaced to grind the bottom surface 10 of the step hole. After grinding to the second preset roughness range, the felt grinding head 5 is replaced to grind the bottom surface 10 of the step hole until the roughness of the bottom surface 10 of the step hole is ≤1.6.

[0040] The specific implementation process of the present invention is described below:

[0041] 1. Heat the positioning column 4, pass it through the top of the clamp body 3, place it on the crossbar of the clamp body 3, and fix it on the clamp body 3 after cooling;

[0042] 2. Clamp the top end of the clamp body 3 onto the drill chuck 2 of the hand drill 1;

[0043] 3. Select the coarse gauze grinding head 5 according to the quality of the bottom surface 10 of the step hole, and make it close to the bottom surface of the crossbar of the clamp body 3 through the washer 6 and the clamping nut 7;

[0044] 4. Insert the entire device into the stepped hole 9 of the housing 8, so that the positioning column 4 matches the stepped hole 9, and the bottom surface of the grinding head 5 is in close contact with the bottom surface 10 of the stepped hole;

[0045] 5. Turn on the switch of the hand drill 1, rotate the clamp body 3, and then rotate the grinding head 5, and manually press down the entire device, so that the grinding head 5 is always close to the bottom surface 10 of the step hole to achieve the grinding effect;

[0046] 6. After grinding to the first preset roughness range, turn off the switch and remove the grinding head 5 from the step hole 9 of the housing 8;

[0047] 7. Replace the fine sandpaper grinding head 5, felt grinding head 5, etc. according to step 3;

[0048] 8. Repeat steps 4, 5, and 6 until the roughness of the bottom surface 10 of the step hole meets the requirements.

[0049] The device starts the switch of the hand drill 1, rotates the clamp body 3, and then rotates the grinding head 5 to achieve grinding and polishing of the bottom surface 10 of the step hole. The problem that conventional machining cannot guarantee the quality due to high roughness and poor surface quality is solved, and the quality of parts such as shells 8 is improved. At the same time, the device can be applied to other post-assembly shells 8 to avoid losses caused by disassembly of the post-assembly shells 8. If quality problems occur, they can be handled on site in a timely manner, solving the problem of assembly, disassembly, repair and rework of large shells 8, and ensuring the high quality of the product.

[0050] Finally, 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A step hole bottom surface grinding device, characterized in that: include: An electric drill unit for clamping the top end of the concrete body and rotating it; A positioning column, fixed to the middle of the clamp body and matched with the step hole; The grinding head is detachably fixed on the clamp body and is located below the positioning column; the grinding head is in close contact with the bottom surface of the step hole and is used for grinding the bottom surface of the step hole.

2. The device according to claim 1, characterized in that: The electric drill unit comprises: a hand electric drill and a drill chuck; the bottom end of the hand electric drill is fixedly connected to the top end of the drill chuck to provide torque for the drill chuck; the drill chuck is used to clamp the clamp body.

3. The device according to claim 2, characterized in that: The clamp is a cross-shaped structure, comprising: a horizontal rod and a vertical rod that are fixedly connected; the top end of the vertical rod is clamped in the drill chuck; and the bottom end of the vertical rod is inserted into the step hole.

4. The device according to claim 3, characterized in that: A positioning hole is arranged at the center of the positioning column, which is used to penetrate from the top end of the vertical rod and be fixed to the vertical rod, and the bottom surface of the positioning column is tightly attached to the top surface of the horizontal rod.

5. The device according to claim 3, characterized in that: The grinding head is provided with a through hole for passing through the bottom end of the vertical rod and being detachably fixed to the cross rod, and the top surface of the grinding head is in close contact with the bottom surface of the cross rod; the bottom surface of the grinding head is in close contact with the bottom surface of the step hole.

6. The device according to claim 5, characterized in that: The grinding head is fixed to the cross bar through a compression nut.

7. The device according to claim 6, characterized in that: A washer is arranged between the grinding head and the clamping nut.

8. The device according to claim 1, characterized in that: The grinding heads include: a coarse cloth grinding head, a fine sandpaper grinding head, and a felt grinding head.

9. The device according to claim 1, characterized in that: The positioning column is made of non-metallic material.

10. The device according to claim 1, characterized in that: The clamp body is an integrated structure.

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