Inner diameter surface grinding device

Abstract

The embodiment of the invention discloses an inner diameter surface grinding device, and relates to the technical field of 3D printing auxiliary tools. The inner diameter surface grinding device is used for grinding and polishing the inner diameter surface of a tubular workpiece and comprises a grinding container, a circulating sleeve and a pump, wherein the grinding container comprises a cavity for containing grinding liquid, and a liquid inlet and a liquid outlet which are formed in the grinding container and communicated with the cavity in the grinding container; the tubular workpiece and the circulating sleeve are combined, and two ports of the formed combined pipe are connected to a liquid inlet and a liquid outlet of the grinding container respectively, so that a grinding liquid circulating passage is formed among the grinding container, the circulating sleeve and the tubular workpiece; the pump is arranged on the circulating sleeve, and under the action of the pump, the grinding liquid is driven to circularly wash the inner diameter face of the tubular workpiece in the circulating path at the set flow speed in a reciprocating mode. According to the inner diameter surface grinding device, the inner diameter surface of the tubular workpiece can be polished, so that the roughness of the inner diameter surface of the tubular workpiece is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of 3D printing auxiliary tooling, and in particular relates to an inner diameter surface grinding device. Background Art

[0002] At present, for cost and efficiency considerations, capillaries with an inner diameter of 1.0 mm or less are mostly processed and produced using the cold-drawn capillary process (abbreviated as: cold-drawn tube process). However, this process is also limited by the fact that the wall thickness and inner diameter accuracy cannot be guaranteed, and the inner diameter surface (inner wall) is relatively rough. Therefore, when using this process to produce print heads, the printing path in the print head is difficult to achieve the smoothness designed, which will seriously affect the printing quality. Summary of the invention

[0003] In view of this, an object of the present invention is to provide an inner diameter surface grinding device to improve the problem of the roughness of the inner diameter surface of the capillary.

[0004] In some illustrative embodiments, the inner diameter surface grinding device, which is used for grinding and polishing the inner diameter surface of a tubular workpiece, includes: a grinding container, a circulation sleeve and a pump; wherein the grinding container includes a cavity for containing a grinding liquid, and a liquid inlet and a liquid outlet opened on the grinding container and connected to the internal cavity thereof; the tubular workpiece and the circulation sleeve are combined with a tube body, and two ports of the combined tube body formed are respectively connected to the liquid inlet and the liquid outlet of the grinding container to form a circulation passage for the grinding liquid between the grinding container, the circulation sleeve and the tubular workpiece; the pump is arranged on the circulation sleeve, and under the action of the pump, the grinding liquid is driven to circulate back and forth in the circulation passage at a set flow rate to flush the inner diameter surface of the tubular workpiece.

[0005] In some optional embodiments, the inner diameter surface grinding device further includes: a sleeve joint, embedded in the first pipe opening of the circulation sleeve and the tubular workpiece for tube body combination, the circulation sleeve is connected to the first port of the tubular workpiece through the sleeve joint; a first container joint, embedded in the liquid inlet of the grinding container, the grinding container is connected to the second port of the tubular workpiece through the first container joint.

[0006] In some optional embodiments, the second pipe opening of the circulation sleeve extends from the liquid outlet into the cavity of the grinding container and is placed below the liquid surface of the grinding liquid.

[0007] In some optional embodiments, the inner diameter surface grinding device further includes: a second container joint, embedded in the liquid outlet of the grinding container, and the second pipe opening of the circulation sleeve passes through the second container joint and extends into the cavity of the grinding container.

[0008] In some optional embodiments, the circulation sleeve is a single-tube integrated structure or a multi-tube combined structure.

[0009] In some optional embodiments, the liquid inlet is located above the liquid surface of the polishing liquid, and there is a gap between the liquid inlet and the liquid surface of the polishing liquid.

[0010] In some optional embodiments, the pump is a diaphragm pump.

[0011] In some optional embodiments, the inner diameter surface grinding device further includes: a motor, a connecting rod, and a stirring paddle arranged in the grinding container and placed below the liquid surface of the grinding liquid; a stirring port is opened on the grinding container; one end of the connecting rod is assembled on the motor, and the other end thereof extends into the grinding container through the stirring port and is fixedly connected to the stirring paddle.

[0012] In some optional embodiments, the bottom of the stirring paddle is provided with a sweeping brush for destroying the sedimentation structure of the grinding liquid during the rotation of the stirring paddle.

[0013] In some optional embodiments, the tubular workpiece is a print head, and its minimum inner diameter is 0.1-1 mm.

[0014] Compared with the prior art, this application has the following advantages:

[0015] The inner diameter surface grinding device in the embodiment of the present application can polish the inner diameter surface of the tubular workpiece, thereby improving the roughness of the inner diameter surface of the tubular workpiece, reducing the impact of tubular workpieces such as print heads on printing quality, and can also effectively clean deposits / blockages in the print head. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an inner diameter surface grinding device in an embodiment of the present invention;

[0017] Figure 2 This is a structural example 1 of the inner diameter surface grinding device in the embodiment of the present invention;

[0018] Figure 3 It is a schematic diagram of assembling a sleeve joint, a tubular workpiece, and a first container joint of the inner diameter surface grinding device in an embodiment of the present invention;

[0019] Figure 4 This is a second structural example of the inner diameter surface grinding device in the embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of 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.

[0021] It should be noted that the various technical features in the embodiments of the present invention can be combined with each other without conflict.

[0022] The embodiment of the present invention discloses an inner diameter surface grinding device, specifically, as Figure 1-4 As shown, Figure 1 is a schematic structural diagram of an inner diameter surface grinding device in an embodiment of the present invention; Figure 2 This is a structural example 1 of the inner diameter surface grinding device in the embodiment of the present invention; Figure 3 It is a schematic diagram of assembling a sleeve joint, a tubular workpiece, and a first container joint of the inner diameter surface grinding device in an embodiment of the present invention; Figure 4 This is a second structural example of the inner diameter surface grinding device in an embodiment of the present invention; the inner diameter surface grinding device is used for grinding and polishing the inner diameter surface of a tubular workpiece 14, and specifically includes: a grinding container 1, a circulation sleeve 2 and a pump 3; wherein the grinding container 1 includes a cavity for accommodating a grinding liquid 4, and a liquid inlet 101 and a liquid outlet 102 opened on the grinding container 1 and connected to the internal cavity thereof; the tubular workpiece 14 and the circulation sleeve 2 are combined with a tube body, and the two ports of the combined tube body formed are respectively connected to the liquid inlet 101 and the liquid outlet 102 of the grinding container 1, so as to form a circulation passage for the grinding liquid 4 between the grinding container 1, the circulation sleeve 2 and the tubular workpiece 14; the pump 3 is arranged on the circulation sleeve 2, and under the action of the pump, the grinding liquid 4 is driven to circulate back and forth in the circulation passage at a set flow rate to flush the inner diameter surface of the tubular workpiece 14.

[0023] The "tubular workpiece" in the embodiment of the present invention refers to a tubular structure with an internal channel; wherein the internal channel may refer to a single channel (i.e., there are only two connected ports), or may refer to a structure comprising multiple independent and / or intersecting channels. Since the working principle of the inner diameter surface grinding device in the embodiment of the present invention is to drive the grinding fluid to continuously flush and polish the inner diameter surface (inner wall) of the tubular workpiece at a set flow rate to achieve the effect of improving the inner wall surface, no matter what structure the tubular workpiece has, the goal of the circulation passage can be achieved by setting a corresponding interface structure. In order to facilitate quick understanding by those skilled in the art, this application is mainly illustrated by taking a tubular workpiece with a single channel as an example.

[0024] When in use, first pour the grinding liquid 4 into the grinding container 1, and then combine the grinding container 1, the circulation sleeve 2, and the tubular workpiece 14 into a tube body; illustratively, the first pipe opening of the circulation sleeve 2 is connected to the first port of the tubular workpiece 14, the second port of the tubular workpiece 14 is connected to the liquid inlet 101 of the grinding container 1, and the liquid outlet 102 of the grinding container 1 is connected to the second pipe opening of the circulation sleeve 2. At this time, a closed circulation passage is formed between the grinding container 1, the circulation sleeve 2, and the tubular workpiece 14. Since the tubular workpiece 14 is a part of the circulation passage, when the pump is started, the grinding liquid 4 will continuously flush the inner diameter surface of the tubular workpiece 14 at a set flow rate. It should be understood by those skilled in the art that in the above structure, the assembly position of the tubular workpiece 14 can also be changed to be located between the second pipe opening of the circulation sleeve 2 and the liquid outlet of the grinding container 1.

[0025] In some embodiments, the number of tubular workpieces in the embodiments of the present invention can be one or more, that is, the inner diameter surface grinding device in the embodiments of the present invention can perform inner wall flushing and grinding on one tubular workpiece, or can perform inner wall flushing and grinding on two or even more tubular workpieces at the same time, and it only needs to combine the tube bodies according to the above-mentioned assembly requirements.

[0026] The inner diameter surface grinding device in the embodiment of the present application can polish the inner diameter surface of the tubular workpiece, thereby improving the roughness of the inner diameter surface of the tubular workpiece, reducing the impact of tubular workpieces such as print heads on printing quality, and can also effectively clean deposits / blockages in the print head.

[0027] In some embodiments, the inner diameter surface grinding device in the embodiments of the present invention may also include: a sleeve joint 5, which is embedded in the first pipe opening of the circulating sleeve 2 and the tubular workpiece 14 for tube body combination, and the circulating sleeve 2 is connected to the first port of the tubular workpiece 14 through the sleeve joint 5; a first container joint 6, which is embedded in the liquid inlet 101 of the grinding container 1, and the grinding container 1 is connected to the second port of the tubular workpiece 14 through the first container joint 6.

[0028] In some embodiments, the second pipe opening of the circulation sleeve 2 extends from the liquid outlet 102 into the cavity of the grinding container 1 and is placed below the liquid surface of the grinding liquid 4 .

[0029] In some embodiments, the inner diameter surface grinding device in the embodiment of the present invention may also include: a second container joint 7, embedded in the liquid outlet 102 of the grinding container 1, and the second pipe opening of the circulation sleeve 2 passes through the second container joint 7 and extends into the cavity of the grinding container 1.

[0030] The sleeve joint 5, the first container joint 6, and the second container joint 7 of the embodiment of the present invention mainly serve to adapt to the different sizes of the tubes / ports of the grinding container 1, the circulation sleeve 2, and the tubular workpiece 14, or the situation where the three structures are difficult to connect. If the structural design of the grinding container 1, the circulation sleeve 2, and the tubular workpiece 14 can meet the requirements of direct connection, the above-mentioned joint structure can be omitted.

[0031] In some embodiments, the circulation casing is a single-tube integrated structure or a multi-tube combination structure. The circulation casing 2 in this embodiment is not limited to a single tube, or is composed of a combination of multiple single tubes; in the example of a combination of multiple single tubes, the diameters of the multiple single tubes may be different, and they may be effectively connected through auxiliary structures such as joints.

[0032] In some embodiments, the liquid inlet 101 is located above the liquid surface of the grinding liquid 4, and there is a gap between the liquid inlet 101 and the liquid surface of the grinding liquid 4. Specifically, the grinding liquid 4 in the grinding container 1 may not fill the entire internal cavity of the grinding container 1, but only fill part of the internal cavity of the grinding container 1, so that the liquid inlet 101 is located above the liquid surface of the grinding liquid 4, and the second port of the tubular workpiece 14 does not directly contact the grinding liquid 4, so that the grinding liquid 4 ejected from the second port of the tubular workpiece 14 will not be affected by the liquid phase resistance, and the set flow rate can be easily achieved through the control of the pump 3. In other embodiments, the grinding liquid 4 can also fill the entire grinding container 1, or the liquid inlet 101 and / or the liquid outlet 102 can also be opened below the liquid surface, but it should be noted that the assembly needs to be completed before filling the grinding liquid to prevent leakage.

[0033] In some embodiments, the pump 3 in the embodiment of the present invention can be any pump on the market that can drive the grinding liquid to flow; preferably, a diaphragm pump can be used, which has the advantages of small structure, light weight and high reliability.

[0034] The circulation sleeve 2 in the embodiment of the present invention can be a soft tube and / or a hard tube, which can be determined according to the structural function requirements.

[0035] In some embodiments, the inner diameter surface grinding device in the embodiments of the present invention may also include: a motor 8, a connecting rod 9, and a stirring paddle 10 arranged in the grinding container 1 and placed below the liquid surface of the grinding liquid 4; a stirring port 103 is opened on the grinding container 1; one end of the connecting rod 9 is assembled on the motor 8, and the other end thereof extends into the grinding container 1 through the stirring port 103 and is fixedly connected to the stirring paddle 10.

[0036] In some embodiments, a third container joint 11 may be provided at the stirring port 103 for assembling the connecting rod 9 .

[0037] The grinding liquid in the embodiments of the present invention is mostly a suspension of micro-nano grinding particles and water (or other solvents). The function of the stirring paddle in the above embodiments is to stir the suspension, stir and disperse the grinding particles in the suspension, and avoid sedimentation at the bottom of the container.

[0038] Preferably, the stirring paddle 10 in the embodiment of the present invention has a sweeping brush 12 at the bottom thereof to destroy the sedimentation structure of the grinding liquid 4 during the rotation of the stirring paddle 10 .

[0039] When the inner diameter surface grinding device is left unused for a long time, the grinding liquid in the grinding container is bound to settle and deposit, thereby forming a thicker layer of sediment (sedimentation structure) at the bottom of the container. When it is used again at this time, a single stirring paddle will hardly destroy the stable structure of the sediment. Therefore, the present application adds a sweeping brush that can directly contact the sediment at the bottom of the stirring paddle, which can quickly destroy the stable structure of the sediment, thereby quickly achieving the effect of dispersing and stirring.

[0040] Furthermore, the sweeping brush 12 includes one or more protruding structures that are evenly arranged and extend downward from the bottom of the stirring paddle. The protruding structures are not limited to metallic or non-metallic "nail"-like structures.

[0041] The tubular workpiece in the embodiment of the present invention may be a print head, whose minimum inner diameter is 0.1-1 mm. Exemplarily, the print head is an aerosol jet print head with an inner diameter of 0.8 mm.

[0042] In some embodiments, the embodiments of the present invention also include: an equipment rack 13, which can be used to carry components such as the motor 8 and the pump 3, and at the same time surround the entire device to perform enclosure protection.

[0043] 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An inner diameter surface grinding device, characterized in that: It is used for grinding and polishing the inner diameter surface of a tubular workpiece, and comprises: a grinding container, a circulation sleeve and a pump; wherein the grinding container comprises a cavity for accommodating a grinding liquid, and a liquid inlet and a liquid outlet which are arranged on the grinding container and communicate with the inner cavity thereof; The tubular workpiece and the circulation sleeve are combined with a tube body, and two ports of the combined tube body are respectively connected to the liquid inlet and the liquid outlet of the grinding container, so as to form a circulation passage for the grinding liquid between the grinding container, the circulation sleeve and the tubular workpiece; The pump is arranged on the circulation sleeve, and under the action of the pump, the grinding fluid is driven to circulate back and forth in the circulation passage at a set flow rate to flush the inner diameter surface of the tubular workpiece.

2. The inner diameter surface grinding device according to claim 1, characterized in that: Also includes: A casing joint, embedded in a first pipe opening of the circulation casing and the tubular workpiece for pipe body combination, the circulation casing is connected to the first port of the tubular workpiece through the casing joint; The first container joint is embedded in the liquid inlet of the grinding container, and the grinding container is connected to the second port of the tubular workpiece through the first container joint.

3. The inner diameter surface grinding device according to claim 1, characterized in that: The second pipe opening of the circulation sleeve extends from the liquid outlet into the cavity of the grinding container and is placed below the liquid surface of the grinding liquid.

4. The inner diameter surface grinding device according to claim 3, characterized in that: Also includes: The second container joint is embedded in the liquid outlet of the grinding container, and the second pipe opening of the circulation sleeve penetrates the second container joint and extends into the cavity of the grinding container.

5. The inner diameter surface grinding device according to claim 1, characterized in that: The circulation casing is a single-tube integrated structure or a multi-tube combined structure.

6. The inner diameter surface grinding device according to claim 1, characterized in that: The liquid inlet is located above the liquid surface of the polishing liquid, and there is a gap between the liquid inlet and the liquid surface of the polishing liquid.

7. The inner diameter surface grinding device according to claim 1, characterized in that: The pump is a diaphragm pump.

8. The inner diameter surface grinding device according to claim 1, characterized in that: Also includes: A motor, a connecting rod, and a stirring paddle disposed in the grinding container and placed below the liquid surface of the grinding liquid; The grinding container is provided with a stirring port; One end of the connecting rod is assembled on the motor, and the other end thereof extends into the grinding container through the stirring port and is fixedly connected to the stirring paddle.

9. The inner diameter surface grinding device according to claim 1, characterized in that: The bottom of the stirring paddle is provided with a sweeping brush for destroying the sedimentation structure of the grinding liquid during the rotation of the stirring paddle.

10. The inner diameter surface grinding device according to claim 1, characterized in that: The tubular workpiece is a printing head, and its minimum inner diameter is 0.1-1 mm.

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