A precision automated auxiliary machining device for circumferential holes of disc-shaped parts

Abstract

This invention discloses a precision automated auxiliary machining device for circumferential holes in disc-shaped parts, comprising: a reference plate, a connecting plate, screws, and multiple positioning units; wherein, the reference plate is connected to the connecting plate via the screws; the connecting plate is connected to a gantry robot capable of automatic loading and unloading; and the multiple positioning units are all disposed on the reference plate. This invention achieves convenient clamping of multiple parts and high-precision positioning of circumferential holes, suppresses the chatter effect during machining of disc-shaped parts, thereby improving the form and position accuracy and dimensional accuracy of the circumferential holes.

Description

Technical Field

[0001] This invention belongs to the technical field of disc-shaped parts processing equipment, and particularly relates to a precision automated auxiliary processing device for circumferential holes in disc-shaped parts. Background Technology

[0002] Disc-shaped parts are commonly used in various mechanical structures, serving functions such as transmission, support, positioning, sealing, and isolation in different applications, making them a typical type of machined part. As the performance and demand of machined products increase, the requirements for machining accuracy and efficiency of disc-shaped parts also rise. For example, the chuck used to support the plunger in a piston pump typically has 7-9 evenly distributed holes around its circumference, with a positional accuracy requirement better than 0.02mm, while the distance between the inner wall of the hole and the outer circle of the part is only 2-3mm. When machining circumferential holes using wire EDM, cutting marks are easily generated on the hole wall during wire winding, affecting the hole wall quality. Although wire EDM technology has high machining accuracy, achieving a positional accuracy of 0.02mm, its machining efficiency is low and its cost is high, making it unsuitable for mass automated machining. When machining circumferential holes using a machining center, a three-jaw chuck is usually used for clamping. However, because the inner wall of the circumferential hole is close to the outer circle of the part, micro-vibration is easily generated when machining thin disc-shaped parts. This causes some circumferential holes to fail to meet the precision machining requirements in terms of positional accuracy and roundness. In order to ensure the positional accuracy of the circumferential holes, alignment operations must be performed every time the part is clamped. This not only affects the machining efficiency but is also unsuitable for automated production lines in mass production.

[0003] The patented drilling fixture for machining disc-shaped parts (Publication No. CN221312577U, Publication Date 2024-07-12), the patented positioning fixture for machining disc-shaped parts (Publication No. CN221313361U, Publication Date 2024-07-12), the patented drilling fixture for machining disc-shaped parts (Publication No. CN219443524U, Publication Date 2023-08-01), the patented positioning device for machining disc-shaped parts (Publication No. CN219444351U, Publication Date 2023-08-01), and the patented circumferential hole machining device for disc-shaped parts (Publication No. CN105171524A, Publication Date 2015-12-23) respectively utilize cylinder assemblies, threaded rods, indexing plates, etc. to drive positioning blocks to achieve precise positioning of the single rotation angle of the worktable. However, these tooling fixtures are only suitable for manual drilling machines. After each hole is machined, the device needs to be manually adjusted, which affects the processing efficiency and makes it impossible to achieve automated mass production of disc-shaped parts.

[0004] A patented adjustable angle machining fixture for disc-shaped parts (publication number CN219310698U, publication date 2023-07-07) uses a threaded rod to push a support plate to adjust the machining angle of the disc-shaped parts. This fixture can machine tapered holes, but the force on the parts is uneven during machining, and the rigidity of the clamping part is low. When the thickness of the disc-shaped parts is small, the parts are prone to vibration during machining, which affects the accuracy and is not suitable for precision machining.

[0005] The patents for an automatic loading and unloading device for processing disc-shaped parts (Publication No. CN214722948U, Publication Date 2021-11-16), an automatic loading and unloading device for processing disc-shaped parts (Publication No. CN212071235U, Publication Date 2020-12-04), and an automatic loading and unloading device for processing disc-shaped parts (Publication No. CN206550360U, Publication Date 2017-10-13) can realize automatic loading and unloading of disc-shaped parts. The patent for an internal support processing fixture for disc-shaped parts (Publication No. CN216802495U, Publication Date 2022-06-24) can realize stable clamping during the processing of disc-shaped parts. However, none of these fixtures can achieve automatic positioning of circumferential holes. Therefore, these fixtures are only suitable for the automated processing of the end face and center hole of disc-shaped parts. Summary of the Invention

[0006] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a precision automated auxiliary machining device for circumferential holes of disc-shaped parts. This device enables convenient clamping of multiple parts and high-precision positioning of circumferential holes, suppresses the chatter effect of disc-shaped parts during machining, and thus improves the form and position accuracy and dimensional accuracy of circumferential holes.

[0007] The objective of this invention is achieved through the following technical solution: a precision automated auxiliary machining device for circumferential holes of disc-shaped parts, comprising: a reference plate, a connecting plate, screws, and multiple positioning units; wherein, the reference plate is connected to the connecting plate by the screws; the connecting plate is connected to a gantry robot capable of automatic loading and unloading; and multiple positioning units are all disposed on the reference plate.

[0008] In the aforementioned automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts, the positioning unit includes two positioning blocks, a pressure plate, a fastening screw, and the disc-shaped part; wherein, both positioning blocks are integrally connected to the reference plate; the disc-shaped part is placed on the reference plate and is located between the two positioning blocks; one end of the pressure plate is inserted into one positioning block, and the other end of the pressure plate is inserted into the other positioning block, with the bottom of the pressure plate pressing against the disc-shaped part; one end of the fastening screw passes through the pressure plate and the disc-shaped part in sequence to complete the clamping and positioning of the disc-shaped part.

[0009] In the aforementioned automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts, the pressure plate includes multiple guide holes, two limiting posts, a positioning hole, and a frustum. The two limiting posts are integrally connected to the frustum, and are distributed on both sides of the frustum, aligned in a straight line. The positioning hole is located at the center of the frustum. Multiple guide holes are located circumferentially on the frustum. One end of the fastening screw passes through the positioning hole. One limiting post is inserted into a positioning block, and the other limiting post is inserted into another positioning block. The bottom of the frustum presses against the disc-shaped part.

[0010] In the aforementioned automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts, the flatness of the bottom of the frustum is better than 0.003 mm, and the perpendicularity of the frustum to its own axis of rotation is better than 0.005 mm; the cylindricity of the guide hole is better than 0.01 mm, and the perpendicularity of the axis of the guide hole to the bottom of the frustum is better than 0.005 mm; the axis of the positioning hole coincides with the axis of the frustum, and the perpendicularity of the rotation surface of the positioning hole to the step surface is better than 0.005 mm; the perpendicularity of the side surface of the limiting post to the bottom surface is better than 0.005 mm.

[0011] In the aforementioned automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts, screw holes are arranged at the four corners of the reference plate, and one end of the screw passes through the screw hole and is connected to the connecting plate.

[0012] In the aforementioned automated auxiliary precision machining device for circumferential holes of disc-shaped parts, the reference plate is provided with chip-receiving holes to accommodate the chips generated when machining circumferential holes in disc-shaped parts.

[0013] In the aforementioned automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts, a positioning and fastening post is provided on the reference plate, and the center hole of the disc-shaped part is fitted onto the outer surface of the positioning and fastening post; the upper end face of the positioning and fastening post cooperates with the positioning hole to achieve clamping of the disc-shaped part.

[0014] In the aforementioned precision automated auxiliary machining device for circumferential holes of disc-shaped parts, the cylindricity of the chip-collecting hole is better than 0.01 mm, and the perpendicularity of the axis of the chip-collecting hole to the end face of the reference plate is better than 0.005 mm.

[0015] In the aforementioned automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts, the cylindricity of the positioning fastening column is better than 0.01 mm, and the perpendicularity of the rotating surface of the positioning fastening column to the upper end surface is better than 0.005 mm.

[0016] A method for precision automated machining of circumferential holes in disc-shaped parts using a precision automated auxiliary machining device includes: Step S1: Place the reference plate on the connecting plate, pass the screws through the screw holes in the reference plate and tighten them through the threads; Step S2: Pass the center hole of the disc-shaped part through the positioning fastening post; Step S3: Place the stepped surface of the positioning hole of the pressure plate onto the positioning fastening post, insert the limiting posts on both sides of the pressure plate into the corresponding positioning block of each limiting post, and screw one end of the fastening screw through the positioning hole thread into the positioning fastening post. Step S4: Start the gantry robot with automatic loading and unloading to send the processing device to the machining center for spiral milling of the circumferential hole. The processing is divided into rough milling and finish milling. The spindle speed for rough milling is 3000 rpm ~ 4000 rpm and the feed rate is 80 mm / min ~ 100 mm / min. The spindle speed for finish milling is 3000 rpm ~ 4000 rpm and the feed rate is 40 mm / min ~ 60 mm / min. Step S5: After processing is complete, unscrew the fastening screws, pull out the pressure plate, and take out the processed disc-shaped part.

[0017] Compared with the prior art, the present invention has the following advantages: (1) The present invention can ensure that the workpiece is subjected to uniform force distribution during the processing. The rigidity of the system is improved by the three-level rigid constraint structure of pressure plate-positioning block-reference plate, and it has high clamping and positioning accuracy, which can effectively guarantee the realization of precision machining tasks. (2) Under one clamping condition, the present invention can complete the machining of all circumferential hole systems of several disc-shaped parts. The workpiece loading and unloading process is simple and suitable for mass automated production scenarios. (3) By using a pressure plate to clamp the disc-shaped parts axially, the present invention achieves convenient clamping of multiple parts and high-precision positioning of circumferential holes, suppresses the vibration effect of disc-shaped parts during processing, thereby improving the form and position accuracy and dimensional accuracy of circumferential holes; in addition, the present invention is also compatible with automated gantry robots, ultimately realizing the precision automated and efficient processing of circumferential holes of disc-shaped parts. (4) The present invention uses a pressure plate with uniformly distributed guide holes to clamp the disc-shaped parts axially, so that the parts are subjected to uniform force and significantly suppress the vibration effect of the parts during processing. Without affecting the processing efficiency, it effectively improves the processing accuracy of the circumferential holes of the disc-shaped parts, especially the positional accuracy. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of a precision automated auxiliary machining device for circumferential holes of disc-shaped parts provided in an embodiment of the present invention; Figure 2 yes Figure 1 A cross-sectional view of line AA in the diagram; Figure 3 yes Figure 1 Enlarged view of region C in the image; Figure 4 yes Figure 1 A cross-sectional view of the BB line in the diagram; Figure 5 This is a schematic diagram of a disc-shaped part provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the pressure plate provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the reference plate provided in an embodiment of the present invention; Figure 8 yes Figure 7 A magnified view of region D in the image. Detailed Implementation

[0019] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of a precision automated auxiliary machining device for circumferential holes of disc-shaped parts provided in an embodiment of the present invention; Figure 2 yes Figure 1 A cross-sectional view of line AA in the diagram; Figure 3 yes Figure 1 Enlarged view of region C in the image; Figure 4 yes Figure 1 A cross-sectional view of the BB line in the diagram; Figure 5 This is a schematic diagram of a disc-shaped part provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the pressure plate provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the reference plate provided in an embodiment of the present invention; Figure 8 yes Figure 7 A magnified view of region D in the image.

[0021] like Figure 1As shown, the precision automated auxiliary machining device for the circumferential holes of the disc-shaped parts includes: a reference plate 1, a connecting plate 2, screws 3, and multiple positioning units; wherein, the reference plate 1 is connected to the connecting plate 2 by the screws 3; the connecting plate 2 is connected to a gantry robot that can automatically load and unload materials; and multiple positioning units are all set on the reference plate 1.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the positioning unit includes two positioning blocks 4, a pressure plate 5, a fastening screw 6, and a disc-shaped part 7. Both positioning blocks 4 are integrally connected to the reference plate 1. The disc-shaped part 7 is placed on the reference plate 1 and is located between the two positioning blocks 4. One end of the pressure plate 5 is inserted into one positioning block 4, and the other end of the pressure plate 5 is inserted into the other positioning block 4. The bottom of the pressure plate 5 presses against the disc-shaped part 7. One end of the fastening screw 6 passes through the pressure plate 5 and the disc-shaped part 7 in sequence, completing the clamping and positioning of the disc-shaped part 7.

[0023] The reference plate 1 and the connecting plate 2 are connected and fixed by screws 3; the connecting plate 2 is connected to the gantry robot that can automatically load and unload materials, and its size can be reasonably adjusted according to the gantry structure; the positioning block 4 is an integral structure with the reference plate 1, and it can cooperate with the pressure plate 5 to restrict the degree of freedom of the disc-shaped part 7; the fastening screw 6 passes through the pressure plate 5 and the disc-shaped part 7 to complete the clamping and positioning of the disc-shaped part 7.

[0024] like Figure 6 As shown, the pressure plate 5 includes multiple guide holes 10, two limiting posts 11, positioning holes 12, and a frustum 50. The two limiting posts 11 are integrally connected to the frustum 50, and are distributed on both sides of the frustum 50, aligned in a straight line. A positioning hole 12 is provided at the center of the frustum 50. Multiple guide holes 10 are provided around the circumference of the frustum 50. One end of a fastening screw 6 passes through the positioning hole 12. One limiting post 11 is inserted into a positioning block 4, and the other limiting post 11 is inserted into another positioning block 4. The bottom of the frustum 50 presses against the disc-shaped part 7.

[0025] Pressure plate 5, such as Figure 6 As shown, there are limit posts 11 on both sides, which can transmit the radial force and torque on the pressure plate 5 to the positioning block 4, which is used to limit the radial rotation and movement freedom of the pressure plate 5 and facilitate clamping; the guide hole 10 is clearance fit with the tool and is used to guide and position the tool when machining the circumferential hole 8; the positioning hole 12 is fitted with the fastening screw 6; after the pressure plate 5 is clamped by the fastening screw 6, it transmits the clamping force axially to the disc-shaped part 7 to achieve axial precise positioning of the disc-shaped part 7.

[0026] The pressure plate 5 has a flatness of its bottom surface that contacts the disc-shaped part 7 better than 0.003 mm, and a perpendicularity of its own axis of rotation better than 0.005 mm. The guide hole 10 has a diameter related to the machining tool, usually 0.1 mm larger than the tool diameter, a cylindricity better than 0.01 mm, and its axis is in the same cross-section as the axis of the pressure plate 5, with a positional accuracy better than 0.015 mm, and a perpendicularity of its bottom surface better than 0.005 mm. The positioning hole 12 has an axis that coincides with the axis of the pressure plate 5, and its rotating surface is perpendicular to the stepped surface better than 0.005 mm. The perpendicularity of the side of the limiting post 11 to the bottom surface is better than 0.005 mm.

[0027] The flatness of the bottom of the frustum 50 is better than 0.003 mm, and the perpendicularity of the frustum 50 to its own axis of rotation is better than 0.005 mm; the cylindricity of the guide hole 10 is better than 0.01 mm, and the perpendicularity of the axis of the guide hole 10 to the bottom of the frustum 50 is better than 0.005 mm; the axis of the positioning hole 12 coincides with the axis of the frustum 50, and the perpendicularity of the rotating surface of the positioning hole 12 to the step surface is better than 0.005 mm; the perpendicularity of the side surface of the limiting post 11 to the bottom surface is better than 0.005 mm.

[0028] like Figure 8 As shown, screw holes 13 are arranged at the four corners of the reference plate 1, and one end of the screw 3 passes through the screw hole 13 to connect with the connecting plate 2. The reference plate 1 has a chip-receiving hole 14 to accommodate the chips generated when the disc-shaped part 7 is machined into the circumferential hole 8. A positioning fastening post 15 is provided on the reference plate 1, and the center hole 9 of the disc-shaped part 7 is fitted onto the outer surface of the positioning fastening post 15; the upper end face of the positioning fastening post 15 mates with the positioning hole 12 to clamp the disc-shaped part 7.

[0029] Reference plate 1, such as Figure 7 and Figure 8 As shown, screw holes 13 are arranged at the four corners for connection and fixation with the connecting plate 2; chip holes 14 are used to accommodate the chips generated when the disc-shaped part 7 is processed into the circumferential hole 8; positioning fastening post 15, the upper end face of which mates with the positioning hole 12 of the pressure plate to clamp the disc-shaped part 7, and the rotating surface mates with the center hole 9 of the disc-shaped part 7 to achieve precise radial positioning of the disc-shaped part 7.

[0030] The cylindricity of the chip-receiving hole 14 is better than 0.01 mm, and the perpendicularity of the axis of the chip-receiving hole 14 to the end face of the reference plate is better than 0.005 mm. The cylindricity of the positioning fastening post 15 is better than 0.01 mm, and the perpendicularity of the rotating surface of the positioning fastening post 15 to the upper end face is better than 0.005 mm.

[0031] The reference plate 1 has a chip hole 14 with a cylindricity better than 0.01 mm, its axis is in the same cross section as the axis of the positioning fastening column 15, its positional accuracy is better than 0.015 mm, and its perpendicularity to the end face of the reference plate 1 is better than 0.005 mm; the positioning fastening column 15 has a cylindricity better than 0.01 mm, and its rotation surface is perpendicular to the upper end face better than 0.005 mm; the positioning block 4 has a roundness better than 0.005 mm.

[0032] When the disc-shaped part 7 is subjected to cutting force during machining, its radial cutting force is borne by the positioning fastening post 15, while the axial cutting force, which is prone to micro-vibration, is transmitted to the pressure plate 5 and borne by the fastening screw 6. Since the upper end face of the disc-shaped part 7 is almost entirely in contact with the lower end face of the pressure plate 5, the stress transmission is relatively uniform, which can effectively suppress the vibration of the part and thus improve the positional accuracy of the circumferential hole.

[0033] 7. Disc-shaped parts, such as Figure 2 As shown, it typically has several circumferential holes 8, whose position relative to the axis of rotation of the central hole 9 is better than 0.02 mm, and whose end face flatness is better than 0.002 mm.

[0034] This embodiment also provides a method for precision automated machining of circumferential holes in disc-shaped parts using a precision automated auxiliary machining device for circumferential holes in disc-shaped parts. The method includes: Step S1: Place the reference plate 1 on the connecting plate 2, and pass the screw 3 through the screw hole 13 in the reference plate 1 and tighten it by thread; Step S2: Pass the center hole 9 of the disc-shaped part 7 through the positioning fastening post 15; Step S3: Place the stepped surface of the positioning hole 12 of the pressure plate 5 onto the positioning fastening post 15, insert the limiting posts 11 on both sides of the pressure plate 5 into the corresponding positioning block 4 of each limiting post 11, and thread one end of the fastening screw 6 through the positioning hole 12 into the positioning fastening post 15. Step S4: Start the gantry robot with automatic loading and unloading to send the processing device to the machining center for spiral milling of the circumferential hole 8. The processing is divided into rough milling and finish milling. The spindle speed for rough milling is 3000 rpm ~ 4000 rpm and the feed rate is 80 mm / min ~ 100 mm / min. The spindle speed for finish milling is 3000 rpm ~ 4000 rpm and the feed rate is 40 mm / min ~ 60 mm / min. Step S5: After processing, unscrew the fastening screw 6, pull out the pressure plate 5, and take out the processed disc-shaped part 7.

[0035] Specifically, the method includes the following steps: (1) Place the reference plate 1 on the connecting plate 2, and tighten the four screws 3 through the screw holes 13 and screw them in with threads; (2) Pass the center holes 9 of the two disc-shaped parts 7 through the positioning fastening post 15 in sequence; (3) Place the stepped surface of the positioning hole 12 of the pressure plate 5 onto the positioning fastening post 15, insert the two side limit posts 11 into the positioning block 4, screw the fastening screw 6 into the positioning fastening post 15, and tighten it by thread. (4) Repeat steps (2)-(3) until the remaining positioning and fastening posts 5 are finished; the installation of the device is complete. (5) Start the automatic gantry robot and send the device to the machining center to helically mill the circumferential hole 8. The machining is divided into two steps: rough milling and finish milling. The spindle speed for rough milling can be selected as 3000~4000rpm and the feed rate can be selected as 80~100mm / min. The spindle speed for finish milling can be selected as 3000~4000rpm and the feed rate can be selected as 40~60mm / min. (6) After the processing is completed, unscrew the fastening screw 6, pull out the pressure plate 5, take out the processed disc-shaped part 7, and repeat steps (2)-(5) to realize the workpiece replacement and complete the automatic precision machining of the circumferential hole.

[0036] This device ensures uniform force distribution on the workpiece during processing. It achieves enhanced system rigidity through a three-tiered rigid constraint structure consisting of a pressure plate, positioning block, and reference plate, and boasts high clamping and positioning accuracy, effectively guaranteeing the completion of precision machining tasks. Under single clamping conditions, it can complete the machining of all circumferential holes in several disc-shaped parts. The workpiece loading and unloading process is simple, making it suitable for mass automated production scenarios. The circumferential hole position accuracy of disc-shaped parts processed using this device can reach 0.02mm, and the average machining time for each circumferential hole is approximately 20 seconds.

[0037] This embodiment utilizes a clamping plate to axially clamp disc-shaped parts, achieving convenient clamping of multiple parts and high-precision positioning of circumferential holes. It also suppresses the chattering effect during machining of disc-shaped parts, thereby improving the form and position accuracy and dimensional accuracy of the circumferential holes. Furthermore, this embodiment is also compatible with automated gantry robots, ultimately enabling precise, automated, and efficient machining of circumferential holes in disc-shaped parts.

[0038] This embodiment uses a pressure plate with evenly distributed guide holes to axially clamp the disc-shaped parts, so that the parts are subjected to uniform force, which significantly suppresses the chatter effect of the parts during processing. Without affecting the processing efficiency, it effectively improves the processing accuracy of the circumferential holes of the disc-shaped parts, especially the positional accuracy.

[0039] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A precision automated auxiliary machining device for circumferential holes in disc-shaped parts, characterized in that... include: The base plate (1), connecting plate (2), screws (3), and multiple positioning units; among which, The reference plate (1) is connected to the connecting plate (2) by the screw (3); The connecting plate (2) is connected to a gantry robot that can automatically load and unload materials; Multiple positioning units are disposed on the reference plate (1).

2. The automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts according to claim 1, characterized in that: The positioning unit includes two positioning blocks (4), a pressure plate (5), fastening screws (6), and a disc-shaped part (7); wherein, Both positioning blocks (4) are integrally connected to the reference plate (1); The disc-shaped part (7) is placed on the reference plate (1), and the disc-shaped part (7) is located between two positioning blocks (4); One end of the pressure plate (5) is inserted into a positioning block (4), and the other end of the pressure plate (5) is inserted into another positioning block (4). The bottom of the pressure plate (5) is pressed against the disc-shaped part (7). One end of the fastening screw (6) passes through the pressure plate (5) and the disc-shaped part (7) in sequence to complete the clamping and positioning of the disc-shaped part (7).

3. The automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts according to claim 2, characterized in that: The pressure plate (5) includes multiple guide holes (10), two limiting posts (11), a positioning hole (12), and a frustum (50): wherein, Both limiting posts (11) are integrally connected to the frustum (50), wherein the two limiting posts (11) are distributed on both sides of the frustum (50) and the two limiting posts (11) are on a straight line; The positioning hole (12) is provided at the center of the frustum (50); The frustum (50) has multiple guide holes (10) in the circumferential direction; One end of the fastening screw (6) passes through the positioning hole (12); One limiting post (11) is inserted into one positioning block (4), and another limiting post (11) is inserted into another positioning block (4); The bottom of the frustum (50) presses against the disc-shaped part (7).

4. The automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts according to claim 3, characterized in that: The flatness of the bottom of the frustum (50) is better than 0.003 mm, and the perpendicularity of the frustum (50) to its own axis of rotation is better than 0.005 mm; The cylindricity of the guide hole (10) is better than 0.01 mm, and the perpendicularity of the axis of the guide hole (10) to the bottom of the frustum (50) is better than 0.005 mm. The axis of the positioning hole (12) coincides with the axis of the frustum (50), and the perpendicularity of the rotation surface of the positioning hole (12) to the step surface is better than 0.005 mm. The perpendicularity of the side and bottom of the limiting post (11) is better than 0.005 mm.

5. The automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts according to claim 2, characterized in that: Screw holes (13) are arranged at the four corners of the reference plate (1), and one end of the screw (3) passes through the screw hole (13) and connects to the connecting plate (2).

6. The automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts according to claim 2, characterized in that: The reference plate (1) has a chip-collecting hole (14) for collecting the chips generated by the disc-shaped part (7) when machining the circumferential hole (8).

7. The automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts according to claim 6, characterized in that: The reference plate (1) is provided with a positioning fastening post (15), and the center hole (9) of the disc-shaped part (7) is sleeved on the outer surface of the positioning fastening post (15); the upper end face of the positioning fastening post (15) cooperates with the positioning hole (12) to achieve the clamping of the disc-shaped part (7).

8. The automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts according to claim 6, characterized in that: The cylindricity of the chip hole (14) is better than 0.01 mm, and the perpendicularity of the axis of the chip hole (14) to the end face of the reference plate is better than 0.005 mm.

9. The automated auxiliary machining device for precision machining of circumferential holes in disc-shaped parts according to claim 7, characterized in that: The cylindricity of the positioning fastening post (15) is better than 0.01 mm, and the perpendicularity of the rotating surface of the positioning fastening post (15) to the upper end surface is better than 0.005 mm.

10. A method for precision automated machining of circumferential holes in disc-shaped parts using a precision automated auxiliary machining device according to any one of claims 1-9, characterized in that... include: Step S1: Place the reference plate (1) on the connecting plate (2), pass the screw (3) through the screw hole (13) opened in the reference plate (1) and tighten it through the thread; Step S2: Pass the center hole (9) of the disc-shaped part (7) through the positioning fastening post (15); Step S3: Place the stepped surface of the positioning hole (12) of the pressure plate (5) onto the positioning fastening post (15), insert the limiting posts (11) on both sides of the pressure plate (5) into the corresponding positioning block (4) of each limiting post (11), and screw one end of the fastening screw (6) through the positioning hole (12) into the positioning fastening post (15). Step S4: Start the gantry robot that can automatically load and unload materials, and send the processing device to the machining center to helically mill the circumferential hole (8). The processing is divided into rough milling and finish milling. The spindle speed for rough milling is 3000 rpm ~ 4000 rpm, and the feed rate is 80 mm / min ~ 100 mm / min. The spindle speed for finish milling is 3000 rpm ~ 4000 rpm, and the feed rate is 40 mm / min ~ 60 mm / min. Step S5: After processing, unscrew the fastening screw (6), pull out the pressure plate (5), and take out the processed disc-shaped part (7).

Images