CN114012591A - Abrasive flow machining device and method for blind hole type parts - Google Patents
Abrasive flow machining device and method for blind hole type parts Download PDFInfo
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- CN114012591A CN114012591A CN202111244635.2A CN202111244635A CN114012591A CN 114012591 A CN114012591 A CN 114012591A CN 202111244635 A CN202111244635 A CN 202111244635A CN 114012591 A CN114012591 A CN 114012591A
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- blind hole
- end cover
- abrasive
- cylinder
- drainage tube
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- 238000003754 machining Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000002955 isolation Methods 0.000 claims abstract description 41
- 238000005111 flow chemistry technique Methods 0.000 claims abstract description 12
- 238000005192 partition Methods 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 15
- 239000011229 interlayer Substances 0.000 claims description 12
- 239000003082 abrasive agent Substances 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/006—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor for grinding the interior surfaces of hollow workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses an abrasive flow machining device and method for blind hole parts, and belongs to the technical field of manufacturing and machining. The drainage tube comprises a lower end cover, an upper end cover and a barrel body arranged between the upper end cover and the lower end cover, wherein an inner cover of the barrel body is provided with a partition plate, a joint, a drainage tube and a blind hole part; the lower end cover is provided with a plurality of drainage holes, the isolation plate is connected to the upper step surface of the lower end cover, the center of the isolation plate is provided with a central large hole and a plurality of connecting holes which are matched and connected with the connector, the connector is of a hollow structure, the lower end of the connector is detachably and fixedly connected with the connecting holes, the drainage tube penetrates through the connector and the isolation plate and then is connected and installed in the drainage holes of the lower end cover, and the drainage tube is sleeved into the inner hole of the blind hole part and then can be connected to the upper end of the connector. The invention makes up the technical background defect of finishing the inner wall of the blind hole part in the abrasive flow processing field, realizes the group processing of the same part, ensures that the processing characteristics have good consistency and improves the processing efficiency.
Description
Technical Field
The invention relates to the field of manufacturing and processing, in particular to an abrasive flow processing device and method for blind hole parts.
Background
The blind hole part is a typical part widely applied to the aviation manufacturing industry, the processing process of the blind hole part has certain particularity due to the structural particularity, particularly the high-precision blind hole part for an airplane hydraulic and air pressure system has extremely high surface finish requirements due to the sealing effect in the system and the fact that the defects of scratches and the like on the inner wall of a blind hole are not allowed, for example, a piston rod, an outer cylinder and the like, the surface roughness requirement of the inner wall of the blind hole is Ra0.1-Ra0.4, the blind hole part cannot meet the processing requirements due to the adoption of processing modes of fine grinding, honing and the like, and the delivery cycle and the qualification rate of the part are directly influenced.
In order to overcome the defects of the traditional machining means in the aspect of surface roughness of high-precision blind hole parts, researchers in the prior art use abrasive flow machining technology to improve the surface finish of the parts to meet the design requirements, but the blind hole parts still lack related exploration, so that aiming at the problems, an abrasive flow machining device and method for the blind hole parts are researched to meet the requirements of ultrahigh surface finish of the blind hole parts.
Disclosure of Invention
The invention aims to solve the problem that the traditional machining means in the prior art cannot meet the surface roughness required by the inner wall of a high-precision blind hole generally, and provides an abrasive flow machining device and method for blind hole parts.
In order to achieve the above object, the technical solution of the present invention is as follows:
an abrasive flow processing device for blind hole parts comprises a lower end cover, an upper end cover, a barrel body arranged between the upper end cover and the lower end cover, and an isolation plate, a joint, a drainage tube and blind hole parts which are covered in the barrel body; the lower end cover is provided with a plurality of drainage holes, the isolation plate is connected to the upper step surface of the lower end cover, and a gap is reserved between the isolation plate and the drainage holes of the lower end cover; the isolation plate is provided with a central large hole and a plurality of connecting holes which are used for being matched and connected with the joint; the connector is of a hollow structure, the lower end of the connector is connected with the connecting hole, the drainage tube penetrates through the connector and the isolation plate and then is connected with the drainage hole in the lower end cover, and the drainage tube is sleeved into the inner hole of the blind hole part and then is connected to the upper end of the connector.
Furthermore, the upper end face of the upper end cover is attached to the upper working table surface of the upper grinding cylinder, and the upper end cover is provided with a central hole; the lower end surface of the lower end cover is attached to the lower working table surface of the lower grinding cylinder.
Furthermore, both ends of the joint are provided with threads, one end of the external thread of the joint is connected with the connecting hole in the isolating plate, and one end of the internal thread of the joint is connected with the external thread of the end of the blind hole part.
Further, the lower end face of the cylinder body is placed in an end face annular groove formed by the lower end cover and the partition plate, and the upper end face of the cylinder body is attached to a step sinking face of the upper end cover.
Furthermore, the lower end cover is inserted into a positioning hole of a lower workbench of the machine tool through two pins in clearance fit with the lower end cover.
Furthermore, the division board realizes the screw thread through four bolts and lower end cover and can dismantle the connection.
Furthermore, the diameter of the inner hole and the outer circle of the drainage tube is in a frustum-like shape which is linearly reduced along the flowing direction of the abrasive in the inner hole, and an interlayer is reserved between the outer wall of the drainage tube and the inner wall of the blind hole part.
The invention also provides a processing method of the abrasive flow processing device for the blind hole parts, which comprises the following steps:
clamping the whole machining device between the upper working table top and the lower working table top, so that a one-way unique abrasive flow channel is formed among the lower abrasive cylinder of the machine tool, the machining device and the upper abrasive cylinder;
starting the machine tool, moving a piston of a lower abrasive cylinder upwards to push the abrasive of the lower abrasive cylinder to flow, enabling the abrasive to enter the inlet end of the drainage tube, flow through an inner hole of the drainage tube and then flow out of the outlet end;
the grinding material returns and flows after reaching the bottom of the blind hole part, enters an interlayer formed by the drainage tube and the blind hole part and acts on the inner wall surface of the blind hole part;
the grinding material flows out from the orifice of the blind hole part after flowing through the interlayer and flows through the inner cavity of the joint, flows into a space formed by the lower step surface of the lower end cover and the end surface of the isolating plate, and flows out through the central large hole of the isolating plate to enter the cylinder;
the grinding materials are accumulated in the cylinder until all gaps in the cylinder are filled, and the blind hole part is completely wrapped by the grinding materials after the filling is finished;
and finally, the grinding material flows through the center hole of the upper end cover to enter the upper grinding material cylinder and push the piston of the upper grinding material cylinder to move upwards, so that the one-way abrasive flow finishing processing of the inner wall of the blind hole part is completed.
Further, after the parts are machined, the upper workbench is separated from the upper end cover, the upper end cover and the barrel of the machining device are disassembled, and the blind hole parts are taken down after the grinding materials remained in the cleaning device in the disassembling process, namely, the inner wall of the blind hole parts is finished.
In summary, the invention has the following advantages:
1. the invention makes up the technical background defect of finishing processing on the inner wall of the blind hole part in the abrasive flow processing field, can realize the group processing of the same part, ensures that the processing characteristics have good consistency and improves the processing efficiency;
2. the invention can meet the finishing processing requirement of the inner wall of the blind hole part with various specifications by replacing the joint or the joint and the isolation plate, thereby avoiding the use specificity of the device and reducing the manufacturing cost of the device;
3. in the invention, the diameter of the inner hole and the outer circle of the drainage tube is in a frustum-like shape which is linearly reduced along the flowing direction of the abrasive in the inner hole, and the structure of the drainage tube is designed after fluid finite element analysis, so that the distribution of the abrasive flow field can be influenced, the flow field of the abrasive in the blind hole is uniformly distributed in the part processing process, and the polishing and finishing of each area of the inner wall of the blind hole has good consistency.
4. The invention can be suitable for blind hole parts with various specifications, avoids the frequent movement of the device in the part replacing process, improves the safety and shortens the preparation period for part processing;
5. the parts of the processing device are connected by threads and are in clearance fit with the hole shaft, so that the processing device is simple to mount and dismount, strong in operability and good in maintainability.
Drawings
FIG. 1 is a schematic view of an exemplary abrasive stream machining apparatus and method for blind bore type parts according to the present invention;
FIG. 2 is an isometric view of an abrasive flow machining apparatus for blind bore type parts according to the present invention;
FIG. 3 is an exploded isometric view of an abrasive flow machining apparatus for blind bore type parts according to the present invention;
FIG. 4 is a schematic view of the connection of the lower end cap and the spacer plate of an abrasive particle flow processing device for blind hole parts according to the present invention;
FIG. 5 is a schematic illustration of a blind hole component mounting of an abrasive flow machining apparatus for blind hole type components of the present invention;
FIG. 6 is a cross-sectional view of a draft tube of an abrasive flow machining apparatus for blind bore type parts of the present invention;
FIG. 7 is a schematic view of a machine tool for clamping an abrasive flow machining device for blind hole parts according to the invention;
fig. 8 is a schematic diagram of the working principle of the abrasive particle flow processing device and method for the blind hole parts.
In the figure:
1. the grinding device comprises a lower end cover, 2, a pin, 3, a partition plate, 4, a bolt, 5, a connector, 6, a drainage tube, 7, a blind hole part, 8, a cylinder body, 9, an upper end cover, 10, an upper grinding cylinder, 11, an upper workbench, 12, a piston, 13, a lower grinding cylinder, 14, a lower workbench, 15, a connecting hole, 16, a drainage hole, 17, a central large hole, 18, a central hole, 19, an inlet end, 20 and an outlet end.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "vertical", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of description and simplification of description, but do not indicate or imply that the devices or elements that are referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
This embodiment is the most basic embodiment.
The embodiment provides an abrasive particle flow processing device for blind hole parts, which comprises a lower end cover 1, an upper end cover 9 and a cylinder 8 arranged between the upper end cover 9 and the lower end cover 1, wherein an inner cover of the cylinder 8 is provided with a partition plate 3, a connector 5, a drainage tube 6 and a blind hole part 7; the upper end surface of the upper end cover 9 is attached to the upper workbench 11 surface of the upper grinding cylinder 10, and the upper end cover 9 is provided with a central hole 18; the lower end surface of the lower end cover 1 is attached to the surface of a lower workbench 14 of a lower grinding cylinder 13, a plurality of drainage holes 16 are formed in the lower end cover 1, the isolation plate 3 is connected to the upper step surface of the lower end cover 1, and a gap is reserved between the isolation plate and the drainage holes 16 of the lower end cover 1; the center of the isolation plate 3 is provided with a central large hole 17 and a plurality of connecting holes 15 which are used for being matched and connected with the joint 5, the joint 5 is of a hollow structure, the lower end of the joint is detachably and fixedly connected with the connecting holes 15, the drainage tube 6 penetrates through the joint 5 and the isolation plate 3 and then is connected and installed with a drainage hole 16 of the lower end cover 1, and the blind hole part 7 can be connected to the upper end of the joint 5 after the drainage tube 6 is sleeved into the inner hole of the blind hole part.
The processing device forms an abrasive flow channel which is formed by the lower abrasive cylinder 13, the drainage hole 16, the drainage tube 6, the blind hole part 7, the center of the isolation plate 3 is punched, and the center hole 18 of the upper end cover 9 moves to the upper abrasive cylinder 10 in a one-way mode as shown in fig. 8.
Example 2
The invention provides an abrasive flow processing device for blind hole parts, which comprises a lower end cover 1, a pin 2, an isolation plate 3, a bolt 4, a joint 5, a drainage tube 6, a blind hole part 7, a cylinder body 8 and an upper end cover 9 as shown in figure 3.
As shown in fig. 7, the cylinder 8 is a hollow structure, the lower end surface of the cylinder 8 is placed in an end surface ring groove formed by the lower end cover 1 and the partition plate 3, the end surface of the lower end cover 1 is attached to the end surface of the lower workbench 14 of the abrasive particle flow machining machine tool, and the two pins 2 penetrate through two through holes of the lower end cover 1 through clearance fit and are inserted into positioning holes of the lower workbench 14 of the machine tool.
The upper end face of the cylinder body 8 is attached to the step sinking face of the upper end cover 9, so that the cylinder body 8 and the upper end cover 9 are prevented from sliding in a large displacement mode in the machining process to cause the failure of a machining device, and the safety of the machining process is guaranteed. In the process of machining parts, a hydraulic system of the machine tool provides power to enable an upper workbench 11 to tightly press an upper end cover 9, and the whole machining device is clamped between an upper workbench 14 and a lower workbench 14 of the machine tool, so that the whole machining process is more stable.
As shown in fig. 4, after the isolation plate 3 is placed on the upper step surface of the lower end cover 1, the four bolts 4 pass through the end surface through holes to be in threaded connection with the lower end cover 1 so as to limit the relative position between the two, and the isolation plate 3 is prevented from moving in the machining process to influence the abrasive flow field, thereby influencing the part machining effect.
As shown in fig. 7, the draft tube 6 passes through the joint 5 and the isolation plate 3 and then is installed on the lower end cover 1 through threaded connection, as shown in fig. 6, the draft tube 6 is in a truncated cone shape with an inner hole and an outer circle diameter linearly reduced along the flowing direction of the abrasive in the inner hole, and a gap is left between the outer wall of the draft tube 6 and the inner wall of the blind hole part. The inner hole of the drainage tube 6 is an abrasive flow channel, and the structure of the drainage tube is designed after fluid finite element analysis, so that the distribution of an abrasive flow field can be influenced, the flow field of abrasives in the blind hole is uniformly distributed in the part processing process, and the polishing processing of all areas of the inner wall of the blind hole has good consistency.
The drainage tube 6 is connected with the drainage hole 16 of the lower end cover 1 through end threads, the inner hole of the joint 5 penetrates through the drainage tube 6 to be in threaded connection with the isolation plate 3, and the drainage tube 6 is sleeved into the inner hole by the blind hole part 7 and then is connected with the joint 5 through threads, so that a local channel structure for abrasive flowing in the part machining process is formed.
Through carrying out array design to connecting hole 15 on division board 3 and drainage hole 16 on the lower end cover 1, can realize processing in groups of blind hole part 7, greatly improved machining efficiency. The blind hole part 7 is connected with the joint 5 through threads after the drainage tube 6 is sleeved into the inner hole, the two ends of the joint 5 are designed by threads, the external threads are connected with the isolation plate 3, the internal threads are connected with the blind hole part 7, the joint 5 or the joint 5 and the isolation plate 3 can be adapted to processing of parts with various specifications by replacing the joint, and the manufacturing cost is reduced while the utilization rate is improved.
The working process of the invention is as follows:
as shown in fig. 8, after the abrasive flow machining tool is installed, the machining tool is started, under the driving action of a hydraulic system of the machine tool, a piston 12 of a lower abrasive cylinder 13 moves upwards to push abrasive of the lower abrasive cylinder 13 to flow, the abrasive enters an inlet end of a drainage tube 6, flows through an inner hole of the drainage tube and flows out of an outlet end of the drainage tube, the abrasive reaches the bottom of a blind hole part 7 and returns back to flow, enters an interlayer formed by the drainage tube 6 and the blind hole part 7, under the action of the shape structure of the drainage tube 6, a flow field of the abrasive in the interlayer is uniformly distributed, abrasive particles uniformly act on the inner wall surface of the blind hole part 7, and the consistency of finishing machining of the inner wall of the part is ensured; the grinding material flows out from the orifice of the blind hole part 7 after flowing through the interlayer and flows through the inner cavity of the joint 5, flows into a space formed by the lower step surface of the lower end cover 1 and the end surface of the isolation plate 3, and flows out through the central large hole 17 of the isolation plate 3 to enter the cylinder 8; abrasive is accumulated in the cylinder body 8 until all gaps in the cylinder body are filled, the blind hole part 7 is completely wrapped by the abrasive after filling, the machining process is more stable, finally the abrasive flows through the central hole 18 of the upper end cover 9 to enter the upper abrasive cylinder 10 and push the piston 12 of the upper abrasive cylinder 10 to move upwards, and the whole process finishes the one-way abrasive particle flow finishing machining on the inner wall of the blind hole part 7.
Example 3
On the basis of embodiment 2, the present embodiment provides an abrasive flow processing method for a blind hole type part, which includes the following steps:
step 1: mounting the machining device on the lower workbench 14 surface of the abrasive flow machining machine tool, enabling the upper workbench 14 surface and the lower workbench 14 surface to respectively act on the upper end cover 9 and the lower end cover 1 under the driving action of a hydraulic system of the machine tool, clamping the whole machining device between the upper workbench 14 surface and the lower workbench 14 surface, and enabling a single-way and unique abrasive flow channel to be formed among the lower abrasive cylinder 13 of the machine tool, the device and the upper abrasive cylinder 10 of the machine tool;
step 2: the machining tool is started, under the driving action of a hydraulic system of the machine tool, a piston 12 of a lower grinding cylinder 13 moves upwards to push a grinding material of the lower grinding cylinder 13 to flow, the grinding material enters an inlet end 19 of a drainage tube 6, flows out from an outlet end 20 after flowing through an inner hole of the inlet end, reaches the bottom of a blind hole part 7, returns back and flows, and enters an interlayer formed by the drainage tube 6 and the blind hole part 7, under the action of the appearance structure of the drainage tube 6, the flow field of the grinding material in the interlayer is uniformly distributed, abrasive particles uniformly act on the inner wall surface of the blind hole part 7, and the consistency of the polishing and machining of the inner wall of the part is ensured; the grinding material flows out from the orifice of the blind hole part 7 after flowing through the interlayer and flows through the inner cavity of the joint 5, flows into a space formed by the lower step surface of the lower end cover 1 and the end surface of the isolation plate 3, and flows out through the central large hole 17 of the isolation plate 3 to enter the cylinder 8; abrasive is accumulated in the cylinder 8 until all gaps in the cylinder are filled, the blind hole part 7 is completely wrapped by the abrasive after the filling is finished, so that the processing process is more stable, finally the abrasive flows through the central hole 18 of the upper end cover 9 to enter the upper abrasive cylinder 10 and push the piston 12 of the upper abrasive cylinder 10 to move upwards, and the whole process finishes the one-way abrasive particle flow finishing processing on the inner wall of the blind hole part 7;
and step 3: after the parts are machined, the upper workbench 11 is separated from the upper end cover 9 under the action of a machine tool hydraulic system, the upper end cover 9 and the cylinder 8 of the device are disassembled, the blind hole parts 7 are taken down after abrasive materials are left in the cleaning device in the disassembling process, and the finishing machining of the inner walls of the blind hole parts 7 is completed in the process.
The working principle of the invention is as follows: the end surface of the lower end cover 1 is attached to the surface of a lower workbench 14 of an abrasive flow machining machine tool, two pins 2 penetrate through two through holes of the lower end cover 1 through clearance fit and are inserted into positioning holes of the lower workbench 14 of the machine tool, and the isolation plate 3 is placed on the upper step surface of the lower end cover 1 and then is in threaded connection with the lower end cover 1 through four bolts 4 penetrating through the through holes of the end surface of the isolation plate to limit the relative position of the isolation plate and the lower end cover, so that the isolation plate 3 is prevented from moving in the machining process to influence the abrasive flow field, and further influence the machining effect of parts; the joint 5 is installed on the isolation plate 3 through threaded connection; the drainage tube 6 passes through the joint 5 and the isolation plate 3 and is installed on the lower end cover 1 through threaded connection, and the external structure of the drainage tube can influence the distribution of an abrasive flow field and ensure the uniformity of the finishing process; the blind hole part 7 is connected with the joint 5 through threads after the drainage tube 6 is sleeved into an inner hole, the two ends of the joint 5 adopt thread design, external threads are connected with the isolation plate 3, internal threads are connected with the blind hole part 7, the joint 5 or the joint 5 and the isolation plate 3 can be adapted to the processing of parts with different specifications by replacing the joint 5 or the joint 5 and the isolation plate 3, the utilization rate is improved, and meanwhile, the manufacturing cost is reduced; the lower end face of the cylinder 8 is placed in an end face annular groove formed by the lower end cover 1 and the partition plate 3, and the upper end face of the cylinder is attached to a step sinking face of the upper end cover 9, so that the phenomenon that the processing device fails due to large displacement sliding of the cylinder 8 and the upper end cover 9 in the processing process is prevented, and the safety of the processing process is ensured; in the process of machining parts, a hydraulic system of the machine tool provides power to enable an upper workbench 11 to tightly press an upper end cover 9, and the whole device is clamped between an upper workbench 14 and a lower workbench 14 of the machine tool, so that the whole machining process is more stable.
Claims (9)
1. The abrasive particle flow processing device for the blind hole type part is characterized by comprising a lower end cover (1), an upper end cover (9), a cylinder body (8) arranged between the upper end cover (9) and the lower end cover (1), and a partition plate (3), a connector (5), a drainage tube (6) and a blind hole part (7) which are covered in the cylinder body (8); the lower end cover (1) is provided with a plurality of drainage holes (16), the isolation plate (3) is connected to the upper step surface of the lower end cover (1), and a gap is reserved between the isolation plate and the drainage holes (16) of the lower end cover (1); the isolation plate (3) is provided with a central large hole (17) and a plurality of connecting holes (15) which are used for being matched and connected with the joint (5); the connector (5) is of a hollow structure, the lower end of the connector is connected with the connecting hole (15), the drainage tube (6) penetrates through the connector (5) and the isolation plate (3) and then is connected with the drainage hole (16) arranged on the lower end cover (1), and the drainage tube (6) is sleeved in the inner hole of the blind hole part (7) and then is connected to the upper end of the connector (5).
2. The abrasive particle flow machining device for blind hole parts according to claim 1, characterized in that the upper end surface of the upper end cover (9) is attached to the upper workbench (11) surface of the upper abrasive cylinder (10), and the upper end cover (9) is provided with a central hole (18); the lower end face of the lower end cover (1) is attached to the surface of a lower workbench (14) of the lower grinding cylinder (13).
3. The abrasive flow machining device for the blind hole parts is characterized in that threads are arranged at two ends of the connector (5), one end of each outer thread of the connector is connected with the connecting hole (15) in the isolation plate (3), and the other end of each inner thread of the connector is connected with the outer thread of the end of the blind hole part (7).
4. The abrasive particle flow processing device for the blind hole type part is characterized in that the lower end face of the cylinder body (8) is placed in an end face annular groove formed by the lower end cover (1) and the isolation plate (3), and the upper end face of the cylinder body (8) is attached to a stepped sunken face of the upper end cover (9).
5. Abrasive particle flow machining device for blind hole parts according to claim 1, characterised in that the lower end cap (1) is fixed by two pins (2) with clearance fit inserted into the positioning holes of the machine tool lower table (14).
6. The abrasive particle flow machining device for blind hole parts according to claim 1 is characterized in that the isolation plate (3) is in threaded detachable connection with the lower end cover (1) through four bolts (4).
7. The abrasive particle flow machining device for blind hole parts according to claim 1 is characterized in that the drainage tube (6) is in a truncated cone-like shape with inner and outer diameters linearly decreasing in the flow direction of the abrasive material in the inner hole, and an interlayer is left between the outer wall of the drainage tube (6) and the inner wall of the blind hole part (7).
8. The method of any one of claims 1 to 7, comprising the steps of:
clamping the whole machining device between an upper workbench (11) and a lower workbench (14) to form a one-way unique abrasive flow channel among a lower abrasive cylinder (13) of the machine tool, the machining device and an upper abrasive cylinder (10);
starting the machine tool, moving a piston (12) of a lower abrasive cylinder (13) upwards to push the abrasive of the lower abrasive cylinder (13) to flow, enabling the abrasive to enter an inlet end (19) of a drainage tube (6), flow through an inner hole of the drainage tube and then flow out of an outlet end (20);
the abrasive material returns back and flows after reaching the bottom of the blind hole part (7), enters an interlayer formed by the drainage tube (6) and the blind hole part (7), and acts on the inner wall surface of the blind hole part (7);
the abrasive flows through the interlayer and then flows out from the orifice of the blind hole part (7) and flows through the inner cavity of the joint (5), flows into a space formed by the lower step surface of the lower end cover (1) and the end surface of the isolating plate (3), and flows out through the central large hole (17) of the isolating plate (3) and enters the cylinder (8);
the grinding materials are accumulated in the cylinder body (8) until all gaps in the cylinder body are filled, and the blind hole part (7) is completely wrapped by the grinding materials after the filling is finished;
and finally, the grinding material flows through the central hole (18) of the upper end cover (9) to enter the upper grinding material cylinder (10) and push the piston (12) of the upper grinding material cylinder (10) to move upwards, and the one-way abrasive particle flow finishing processing on the inner wall of the blind hole part (7) is completed.
9. The machining method of the abrasive flow machining device for the blind hole parts according to claim 8 is characterized in that after the parts are machined, the upper workbench (11) is separated from the upper end cover (9), the upper end cover (9) and the cylinder (8) of the machining device are disassembled, and the blind hole parts (7) are taken down after residual abrasive materials in the device are cleaned in the disassembling process, so that the inner walls of the blind hole parts (7) are finished being polished.
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| CN202111244635.2A CN114012591A (en) | 2021-10-26 | 2021-10-26 | Abrasive flow machining device and method for blind hole type parts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115213823A (en) * | 2022-06-20 | 2022-10-21 | 成都飞机工业（集团）有限责任公司 | A rotatory auxiliary device for abrasive particle stream finishing |
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| CN2065113U (en) * | 1990-04-07 | 1990-11-07 | 吉林工业大学 | Device for polishing surface of blind hole of nonferrous metal parts |
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Application publication date: 20220208 |