A clamping device for abrasive flow machining

Abstract

The application provides a clamping device for abrasive flow machining, which comprises an upper clamping part, a lower clamping part and an intermediate clamping part arranged between the upper clamping part and the lower clamping part, the intermediate clamping part is formed with a positioning cavity for positioning two straight-groove workpieces in a horizontal direction, the upper clamping part and the lower clamping part are used for positioning the two straight-groove workpieces in a vertical direction, a machining channel is formed between the two straight-groove workpieces, the upper clamping part and the lower clamping part are respectively provided with a first channel and a second channel which are communicated with the machining channel, and the first channel, the machining channel and the second channel are combined to form an abrasive channel for abrasive flow. The application provides a reasonable and reliable clamping tool for polishing the groove surface of the straight-groove workpiece by using the abrasive flow technology, and the groove surfaces of the two straight-groove workpieces can be polished simultaneously during polishing machining, so that the machining efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of machining, and in particular to a clamping device for abrasive flow machining. Background Technology

[0002] Abrasive flow machining involves applying pressure to a viscoelastic polymer carrier containing abrasive grains, which then flows over the surface of the workpiece. This causes the abrasive grains to slide across the surface, achieving a smooth finish, deburring, and reducing surface roughness to meet precision machining requirements.

[0003] Straight groove workpieces are a common structure in machining, such as... Figure 1 As shown, this refers to a longitudinal groove machined on a workpiece, which is widely used in various fields. However, the geometry of the groove on a straight groove workpiece is relatively complex, especially when the groove is deep, narrow, or has a special shape (such as a curved groove). Traditional polishing tools have difficulty reaching the bottom and sidewalls of the groove, making polishing difficult. Abrasive flow machining technology can effectively remove burrs from the groove surface, reduce the surface roughness of the workpiece, and meet the requirements of precision machining.

[0004] One of the key factors in abrasive flow machining is the design of the fixture. There is an urgent need to design a fixture for machining the surface of straight groove workpieces using abrasive flow machining technology. Summary of the Invention

[0005] The purpose of this invention is to provide a clamping device for abrasive flow machining, so as to achieve stable clamping of straight groove workpieces during abrasive flow machining.

[0006] The present invention is achieved through the following technical solution.

[0007] A clamping device for abrasive flow machining includes an upper clamping body, a lower clamping body, and an intermediate clamping body disposed between the two. The intermediate clamping body has a positioning cavity for positioning two straight groove workpieces with opposing and abutting grooves in the horizontal direction. The upper clamping body and the lower clamping body are used to position the two straight groove workpieces in the vertical direction. A processing channel is formed between the two straight groove workpieces. The upper clamping body and the lower clamping body respectively have a first channel and a second channel communicating with the processing channel. The first channel, the processing channel, and the second channel are combined to form an abrasive channel for abrasive flow.

[0008] As a further improvement of the present invention, the first channel, the channel to be processed, and the second channel are all coaxially arranged in the vertical direction, and the cross-sectional areas of the first channel and the second channel are both larger than the cross-sectional area of ​​the channel to be processed.

[0009] As a further improvement of the present invention, a flow guiding mechanism is provided in the channel to be processed along the axial direction, and a flow guiding channel for limiting the flow path of abrasive is formed between the flow guiding mechanism and the groove surface of the straight groove workpiece.

[0010] As a further improvement of the present invention, the axial surface of the flow guiding mechanism is uniformly provided with a plurality of flow guiding components along the circumferential direction, and the flow guiding components include a plurality of inwardly recessed flow guiding grooves arranged sequentially along the axial direction of the flow guiding mechanism.

[0011] As a further improvement of the present invention, the top of the flow guiding mechanism is provided with a connector that can extend out of the first channel, and the connector is detachably connected to the upper clamping body through a connecting structure.

[0012] As a further improvement of the present invention, the connection structure includes a mounting block and a fixing member. The connecting member is screwed onto the mounting block. The mounting block is provided with a first mounting hole. The top of the upper clamping body is provided with a second mounting hole. The fixing member passes through the first mounting hole and is screwed into the second mounting hole.

[0013] As a further improvement of the present invention, it also includes a fastening assembly, wherein the upper clamping body, the lower clamping body, and the intermediate clamping body are respectively provided with a first positioning hole, a second positioning hole, and a third positioning hole, and the fastening assembly detachably and secures the upper clamping body, the lower clamping body, and the intermediate clamping body through the first positioning hole, the second positioning hole, and the third positioning hole.

[0014] As a further improvement of the present invention, the fastening assembly includes a screw and two nuts respectively screwed to both ends of the screw.

[0015] As a further improvement of the present invention, the side of the intermediate clamp is provided with a connecting hole in the horizontal direction to communicate with the positioning cavity, and a transverse positioning member capable of abutting against the straight groove workpiece in the horizontal direction is movably installed in the connecting hole.

[0016] As a further improvement of the present invention, the lateral positioning member is threadedly connected to the connecting hole.

[0017] The beneficial effects of this invention are: This invention provides a reasonable and reliable clamping tool for polishing the groove surface of straight groove workpieces using abrasive flow technology. Furthermore, it can simultaneously perform surface treatment on the groove surfaces of two straight groove workpieces during polishing, resulting in high processing efficiency and maintaining consistency in the processing effect of the two straight groove workpieces. Attached Figure Description

[0018] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings to aid in understanding the objectives and advantages of the present invention, wherein: Figure 1 This is a schematic diagram of the straight groove workpiece in this invention; Figure 2 This is a schematic diagram of the clamping device of the present invention; Figure 3 This is a schematic diagram of the clamping device of the present invention from another perspective; Figure 4 This is a schematic diagram of the specific structure of the intermediate clamp in this invention; Figure 5 This is a schematic diagram of the flow guiding mechanism in this invention; In the picture: 1. Upper clamping body; 11. First channel; 2. Lower clamping body; 21. Second channel; 3. Middle clamping body; 31. Positioning cavity; 32. Third positioning hole; 33. Connecting hole; 4. Flow guiding mechanism; 41. Flow guiding assembly; 411. Flow guiding groove; 5. Connecting piece; 6. Connecting structure; 61. Mounting block; 62. Fixing piece; 7. Fastening assembly; 71. Screw; 72. Nut; 8. Lateral positioning piece. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0020] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0021] This embodiment provides a clamping device for abrasive flow machining, applied to an abrasive flow machine tool, as shown in the following figure. Figures 1-5 The system includes an upper clamping body 1, a lower clamping body 2, and an intermediate clamping body 3 located between the two. The intermediate clamping body 3 has a positioning cavity 31 for positioning two straight groove workpieces a with opposite and abutting grooves in the horizontal direction. The two straight groove workpieces a are installed in the positioning cavity 31. The upper clamping body 1 and the lower clamping body 2 are used to position the two straight groove workpieces a in the vertical direction. A processing channel a1 is formed between the two straight groove workpieces a. The upper clamping body 1 and the lower clamping body 2 have a first channel 11 and a second channel 21 that connect to the processing channel a1. The first channel 11, the processing channel a1, and the second channel 21 form an abrasive channel for abrasive flow. During processing, the abrasive enters the processing channel a1 composed of the two straight groove workpieces a through the first channel 11. The abrasive contacts the surface of the groove, thereby polishing the surface of the groove, and then flows out through the second channel 21.

[0022] It should be noted that as long as the size of the positioning cavity 31 on the intermediate clamping body 3 can match the external size of the two straight groove workpieces a after they are combined, the movement of the two straight groove workpieces a can be restricted in the horizontal direction.

[0023] In this device, the intermediate clamping body 3 positions two straight groove workpieces a horizontally, while the upper clamping body 1 and lower clamping body 2 position them vertically. This allows for accurate positioning of the straight groove workpieces a, ensuring that the abrasive flows precisely over the surface of the grooves to be machined. Simultaneously, as the abrasive flows through the processing channel a1, it polishes the surfaces of the grooves on both workpieces at the same time, significantly improving processing efficiency and reducing abrasive wear.

[0024] In this embodiment, the first channel 11, the channel to be processed a1, and the second channel 21 are coaxially extended in the vertical direction, and the cross-sectional areas of the first channel 11 and the second channel 21 are both larger than the cross-sectional area of ​​the channel to be processed a1, ensuring that the abrasive entering in the vertical direction can fully contact the surface of the groove, thereby improving the consistency of the processing effect.

[0025] Furthermore, a flow guiding mechanism 4 is provided axially within the processing channel a1. A flow guiding channel is formed between the flow guiding mechanism 4 and the groove surface of the straight groove workpiece a. The flow guiding channel limits the flow trajectory of the abrasive. At the same time, the flow guiding mechanism 4 can reduce the flow area of ​​the abrasive within the processing channel a1, allowing the abrasive to be closer to the workpiece surface during flow, thereby optimizing the grinding path, reducing blind spots, and improving the consistency of the processing effect. Specifically, a plurality of flow guiding components 41 are uniformly arranged circumferentially on the axial surface of the flow guiding mechanism 4. Each flow guiding component 41 includes a plurality of inwardly recessed flow guiding grooves 411 arranged sequentially along the axial direction of the flow guiding mechanism 4. When the abrasive flows through the flow guiding grooves 411, it can make full contact with the groove surface of the straight groove workpiece a under the guidance of the flow guiding grooves 411.

[0026] Furthermore, the top of the flow guiding mechanism 4 is provided with a connector 5. The connector 5 can extend out of the upper clamping body 1 through the first channel 11, and the connector 5 is detachably connected to the upper clamping body 1 through the connecting structure 6. The connector 5 has two functions. On the one hand, the connector 5 can fix the flow guiding mechanism 4 in the processing channel a1 to ensure that the flow guiding mechanism 4 can realize its normal function. On the other hand, when the connector 5 is removed from the upper clamping body 1, the flow guiding mechanism 4 can be moved out of the processing channel a1 through the connector 5, thereby removing the flow guiding mechanism 4 from this device, so that the operator can replace different flow guiding mechanisms 4 according to different processing requirements.

[0027] Meanwhile, since debris and residue generated on the surface of the abrasive and straight groove workpiece a may adhere to the flow guiding mechanism 4 during the processing, the detachable design makes it easier to remove these debris and residue, maintaining the cleanliness and processing accuracy of the flow guiding mechanism 4.

[0028] The connecting structure 6 includes a mounting block 61 and a fixing member 62. The connecting member 5 is screwed onto the mounting block 61. The mounting block 61 is also provided with a first mounting hole. The top of the upper clamping body 1 is provided with a second mounting hole. The fixing member 62 passes through the first mounting hole and is screwed into the second mounting hole to detachably fix the mounting block 61 to the top of the upper clamping body 1. When it is necessary to remove the flow guiding mechanism 4 from the upper clamping body 1, the fixing member 62 can be removed from the upper clamping body 1, which is convenient to operate.

[0029] Meanwhile, to facilitate the installation of the straight groove workpiece a, the device also includes a fastening assembly 7. The upper clamping body 1, the lower clamping body 2, and the intermediate clamping body 3 are respectively provided with corresponding first positioning holes, second positioning holes, and third positioning holes 32. The fastening assembly 7 can detachably fix the upper clamping body 1, the lower clamping body 2, and the intermediate clamping body 3 through the first positioning holes, the second positioning holes, and the third positioning holes 32. Specifically, the fastening assembly 7 includes a screw 71 and two nuts 72. During installation, the screw 71 is passed through the upper clamping body 1, the lower clamping body 2, and the intermediate clamping body 3, and the two nuts 72 are respectively connected to the two ends of the screw 71 to fix the upper clamping body 1, the lower clamping body 2, and the intermediate clamping body 3.

[0030] In this embodiment, there will be a certain gap between the two straight groove workpieces a after assembly and the intermediate clamping body 3. In order to prevent the straight groove workpieces a from shaking in the positioning cavity 31, a connecting hole 33 communicating with the positioning cavity 31 is provided on the intermediate clamping body 3 in the horizontal direction. A transverse positioning member 8 that can abut against the straight groove workpieces a in the horizontal direction is movably installed in the connecting hole 33. The horizontal movement of the groove can be prevented by the transverse positioning member 8 abutting against the straight groove workpieces a.

[0031] Preferably, the transverse positioning member 8 is threadedly connected to the connecting hole 33. The outer surface of the transverse positioning member 8 is provided with an external thread, and correspondingly, the inner surface of the connecting hole 33 is provided with an internal thread that mates with the external thread of the transverse positioning member 8.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions 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. A clamping device for abrasive flow machining, characterized in that, The device includes an upper clamping body (1), a lower clamping body (2), and an intermediate clamping body (3) located between the two. The intermediate clamping body (3) has a positioning cavity (31) for positioning two straight groove workpieces (a) with opposite grooves and abutting each other in the horizontal direction. The two straight groove workpieces (a) are installed in the positioning cavity (31). The upper clamping body (1) and the lower clamping body (2) are used to position the two straight groove workpieces (a) in the vertical direction. A processing channel (a1) is formed between the two straight groove workpieces (a). The upper clamping body (1) and the lower clamping body (2) have a first channel (11) and a second channel (21) respectively connecting the processing channel (a1). The first channel (11), the processing channel (a1), and the second channel (21) are combined to form an abrasive channel for abrasive flow. When the abrasive flows through the processing channel (a1), it can polish the groove surfaces of the two workpieces simultaneously. The channel to be processed (a1) is provided with a flow guiding mechanism (4) along the axial direction. A flow guiding channel for limiting the flow path of abrasive is formed between the flow guiding mechanism (4) and the groove surface of the straight groove workpiece (a). A plurality of flow guiding components (41) are uniformly arranged circumferentially on the axial surface of the flow guiding mechanism (4). The flow guiding component (41) includes a plurality of inwardly recessed flow guiding grooves arranged sequentially along the axial direction of the flow guiding mechanism (4). The top of the flow guiding mechanism (4) is provided with a connector (5) that can extend out of the first channel (11). The connector (5) is detachably connected to the upper clamping body (1) through a connecting mechanism (6).

2. The clamping device for abrasive flow machining according to claim 1, characterized in that, The first channel (11), the channel to be processed (a1), and the second channel (21) are all coaxially arranged in the vertical direction, and the cross-sectional area of ​​the first channel (11) and the second channel (21) is larger than the cross-sectional area of ​​the channel to be processed (a1).

3. The clamping device for abrasive flow machining according to claim 1, characterized in that, The connecting mechanism (6) includes a mounting block (61) and a fixing member (62). The connecting member (5) is screwed onto the mounting block (61). The mounting block (61) has a first mounting hole. The top of the upper clamping body (1) has a second mounting hole. The fixing member (62) passes through the first mounting hole and is screwed into the second mounting hole.

4. A clamping device for abrasive flow machining according to claim 1, characterized in that, It also includes a fastening assembly (7), wherein the upper clamping body (1), the lower clamping body (2) and the middle clamping body (3) are respectively provided with a first positioning hole, a second positioning hole and a third positioning hole (32), and the fastening assembly (7) can detachably fix the upper clamping body (1), the lower clamping body (2) and the middle clamping body (3) through the first positioning hole, the second positioning hole and the third positioning hole (32).

5. A clamping device for abrasive flow machining according to claim 4, characterized in that, The fastening assembly (7) includes a screw (71) and two nuts (82) respectively screwed to both ends of the screw (71).

6. A clamping device for abrasive flow machining according to claim 1, characterized in that, The side of the intermediate clamping body (3) is provided with a connecting hole (33) that connects to the positioning cavity (31) in the horizontal direction. A transverse positioning member (8) that can abut against the straight groove workpiece (a) in the horizontal direction is movably installed in the connecting hole (33).

7. A clamping device for abrasive flow machining according to claim 6, characterized in that, The lateral positioning element (8) is threadedly connected to the connecting hole (33).

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