A high-precision machining auxiliary device for tapered thin-walled parts

Abstract

This utility model belongs to the field of automotive parts processing technology, and particularly relates to a high-precision machining auxiliary device for tapered thin-walled parts. It includes a rotating shaft, a positioning shaft, a support base, and a cooling head. The rotating shaft is divided into a tapered support shaft section, a positioning shaft section, and a drive shaft section. The tapered support shaft section has a guide groove; the positioning shaft section has a drainage hole; the positioning shaft abuts against the tapered thin-walled part and has a recovery channel inside; the support base has a mounting hole in the middle and a cooling groove at the top; the cooling head is inserted into the cooling groove. This utility model fully utilizes the structural characteristics of the product to be processed, using its low-precision surface as a positioning and support surface to support and position the precision-machined surface, effectively preventing problems such as deformation of the thin-walled part caused by tool cutting forces. Simultaneously, the cooling fluid channel independently set inside the thin-walled part achieves rapid cooling and recycling of the processing area, achieving the goal of cost reduction and efficiency improvement.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts processing technology, and in particular relates to a high-precision processing auxiliary device for tapered thin-walled parts. Background Technology

[0002] Automotive cooling systems, piping, and other structures involve some thin-walled structures, such as... Figure 1 The conical thin-walled part 9 shown has a conical cylindrical structure at its rear end. Since its conical surface is not a standard conical surface, the thickness of the conical shell is not uniform, and the conical surface has undulations. However, its conical surface has extremely high machining accuracy, so it needs to undergo multiple precision turning and grinding processes. During this process, the thin-walled conical shell is easily affected by tool extrusion and thermal deformation generated during machining, which can lead to structural deformation, machining failure, and a decrease in the final product qualification rate and substandard product performance. Traditional solutions can only reduce the impact by further refining the machining process and reducing the amount of machining each time. However, this method leads to a surge in workload and a significant decrease in product processing efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a high-precision machining auxiliary device for the aforementioned tapered thin-walled part 9, which is suitable for the precision machining of irregular tapered surfaces and can effectively avoid the problem of workpiece deformation due to tool extrusion or machining heat.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A high-precision machining auxiliary device for tapered thin-walled parts includes a rotating shaft 1, a positioning shaft 2, a support base 3, and a cooling head 4;

[0006] The rotating shaft 1 is divided into a tapered support shaft section 10, a positioning shaft section 11, and a drive shaft section 12 from front to back. The tapered support shaft section 10 is matched with the tapered cavity inside the tapered thin-walled part 9. The surface of the tapered support shaft section 10 is uniformly provided with arc-shaped guide grooves 10a, which extend from the front end of the tapered support shaft section 10 to the positioning shaft section 11. The positioning shaft section 11 is provided with a number of drainage holes 11a that are respectively connected to each guide groove 10a.

[0007] The positioning shaft 2 is located on the front side of the rotating shaft 1 to abut against the tapered thin-walled part 9 so that it is fastened to the outside of the tapered support shaft section 10. The positioning shaft 2 is provided with a recycling channel 2a inside.

[0008] The support base 3 is located on the rear side of the rotating shaft 1. The support base 3 has a mounting hole 3a in the middle for mounting the rotating shaft 1. The top of the support base 3 has a cooling groove 3b. The bottom of the cooling groove 3b has a forward-digging cooling port 3c. The cooling port 3c is directly opposite to at least one drainage hole 11a on the top of the positioning shaft section 11.

[0009] The cooling head 4 is inserted into the cooling tank 3b. The cooling head 4 is provided with a coolant channel, which is connected to the bottom cooling tank 3b and the external coolant supply equipment.

[0010] Further improvements or preferred embodiments of the aforementioned high-precision machining auxiliary device for tapered thin-walled parts include a locking nut 5 and a rotary bearing 6; the rotating shaft 1 is installed in the mounting hole 3a through the rotary bearing 6; the rear end of the rotating shaft 1 is provided with an external thread, and the locking nut 5 is tightened on the external thread section and presses against the rotary bearing 6.

[0011] In a further improvement or preferred embodiment of the aforementioned high-precision machining auxiliary device for conical thin-walled parts, the front opening of the guide channel 10a is connected through the annular confluence channel 10b.

[0012] In a further improvement or preferred embodiment of the aforementioned high-precision machining auxiliary device for tapered thin-walled parts, the front side of the support base 3 is provided with a positioning step hole 3d coaxial with the mounting hole 3a, and the rear side of the positioning shaft section 11 is provided with a connecting shaft section that can be embedded in the positioning step hole 3d.

[0013] In a further improved or preferred embodiment of the aforementioned high-precision machining auxiliary device for conical thin-walled parts, the guide groove 10a has a width of 2~4mm and a depth of 2~5mm.

[0014] This invention fully utilizes the structural features of the product to be processed, using its low-precision surface as a positioning and support surface to support and position the precision-machined surface, effectively preventing problems such as deformation of thin-walled parts caused by tool cutting force. At the same time, it uses a cooling fluid channel independently set inside the thin-walled part to achieve rapid cooling of the processing area, preventing heat accumulation and ensuring the temperature uniformity of the workpiece surface during processing. In addition, the independently set cooling fluid channel is independent of the front processing area, which will not cause the channel to be blocked by debris, greatly improving cooling efficiency. Furthermore, it utilizes the recycling of cooling fluid to achieve the purpose of cost reduction and efficiency improvement. Attached Figure Description

[0015] Figure 1 This is a perspective view of an auxiliary device for high-precision machining of tapered thin-walled parts;

[0016] Figure 2 This is a cross-sectional view of an auxiliary device for high-precision machining of tapered thin-walled parts;

[0017] Figure 3 This is an assembly drawing of an auxiliary device for high-precision machining of tapered thin-walled parts;

[0018] The reference numerals in the attached figures include:

[0019] 1. Rotating shaft, 10. Conical support shaft section, 10a. Flow guide groove, 10b. 10b. Positioning shaft section, 11a. Flow guide hole, 12. Drive shaft section, 2. Positioning shaft, 2a. 2a. Support seat, 3a. 3a. 3b. 3c. 3d. Positioning step hole, 5. Locking nut, 4. Cooling head, 6. Rotary bearing. Detailed Implementation

[0020] The present invention will be described in detail below with reference to specific embodiments.

[0021] This utility model relates to a high-precision machining auxiliary device for tapered thin-walled parts. It is mainly used to prevent the surface to be machined from deforming due to the force and heat during the finishing process of non-standard tapered surfaces of tapered thin-walled parts 9, thereby ensuring the machining accuracy of the finished surface, while simplifying the machining process and improving the machining efficiency.

[0022] like Figure 1 As shown, the main structure of the high-precision machining auxiliary device for tapered thin-walled parts includes a rotating shaft 1, a positioning shaft 2, a support base 3, and a cooling head 4;

[0023] The rotating shaft 1 is used to connect the drive device to drive the conical thin-walled part 9 to rotate, so as to facilitate the machining of the tool. The rotating shaft 1 is divided into a conical support shaft section 10, a positioning shaft section 11, and a drive shaft section 12 from front to back. The outer shape of the conical support shaft section 10 matches the inner conical cavity of the conical thin-walled part 9. The surface of the shaft of the conical support shaft section 10 is uniformly provided with arc-shaped guide grooves 10a. The guide grooves 10a extend from the front end of the conical support shaft section 10 to the positioning shaft section 11. The inner side of the positioning shaft section 11 is provided with a number of drainage holes 11a that are respectively connected to each guide groove 10a.

[0024] The positioning shaft 2 is mainly used to clamp and position the workpiece in conjunction with the rotating shaft. The positioning shaft 2 is located in front of the rotating shaft 1 to abut against the tapered thin-walled part 9 so that it is fastened to the outside of the tapered support shaft section 10. The positioning shaft 2 has a retraction channel 2a inside. It is easy to know that the positioning shaft 2 is coaxial with the rotating shaft 1 and directly opposite it.

[0025] like Figure 2 , Figure 3 As shown, the support base 3 is used for support and positioning. The support base 3 is located on the rear side of the rotating shaft 1. The support base 3 has a mounting hole 3a in the middle for mounting the rotating shaft 1. The top of the support base 3 has a cooling groove 3b. The bottom of the cooling groove 3b has a forward-digging cooling port 3c. The cooling port 3c is directly opposite to at least one drainage hole 11a on the top of the positioning shaft section 11.

[0026] The cooling head 4 is used as a connection structure between the external coolant circulation system and the device. For ease of use, in this embodiment, the cooling head 4 is inserted into the cooling tank 3b through a snap-fit ​​structure. The cooling head 4 is provided with a coolant channel, which is connected to the bottom cooling tank 3b and the external coolant supply equipment.

[0027] In use, the device holds and fixes the tapered thin-walled part 9 to the tapered support shaft section 10 of the rotating shaft 1 via the positioning shaft 2. The tapered support shaft section 10 matches the inner tapered cavity of the tapered thin-walled part 9, and the outer surface of the tapered support shaft section 10 uniformly abuts against the inner wall of the tapered thin-walled part 9 to form a stable support, which can effectively prevent the deformation of the thin-walled area of ​​the workpiece caused by the tool force during the machining process. The tapered thin-walled part 9 rotates at a uniform speed on the support seat 3 with the rotating shaft 2 to achieve the finishing of the tapered outer surface. In order to ensure that the machined surface can dissipate heat quickly, guide grooves 10a are uniformly provided on the outer surface of the tapered support shaft section 10. The tool moves back and forth from the highest point of the workpiece's tapered surface, and the guide grooves 10a at the corresponding high points are connected to the external coolant circulation device through the drainage hole 11a and the cooling tank 3b. The flowing coolant quickly removes the heat generated during the machining of the thin-walled structure. By constructing an independent and closed cooling circulation loop, the part can be internally cooled, and the debris generated during the machining of the outer surface will not affect the flow of coolant, ensuring efficient and continuous cooling.

[0028] During actual processing, the rotating shaft 2 is driven to rotate by a motor. To ensure that the rotating shaft 2 can work stably, this embodiment also includes a locking nut 5 and a rotary bearing 6. The rotating shaft 1 is installed in the mounting hole 3a through the rotary bearing 6. The rear end of the rotating shaft 1 is provided with an external thread, and the locking nut 5 is tightened on the external thread section and presses against the rotary bearing 6.

[0029] The rotary bearing 6 can prevent excessive wear between the drive shaft section 12 of the rotating shaft and the mounting hole 3a on the support 3, thus improving the life of the device. The locking nut 6 can better control the front and rear position of the rotating shaft 2, and work with the positioning shaft 2 to achieve stable processing, while limiting the bearing position.

[0030] In particular, to ensure better coolant return, the front opening of the guide channel 10a is connected to the annular confluence channel 10b. The coolant flowing in from the cooling head 4 flows through the inner side of the conical thin-walled part during processing and enters the confluence channel 10b, and finally exits through the internal channel of the support shaft 2. In actual implementation, a positive or negative pressure adsorption system can be used to better realize the coolant recycling.

[0031] In particular, in order to better position the rotating shaft 2 and improve the sealing of the coolant connection channel, a positioning step hole 3d coaxial with the mounting hole 3a is provided on the front side of the support base 3, and a connecting shaft section that can be embedded in the positioning step hole 3d is provided on the rear side of the positioning shaft section 11.

[0032] Based on actual needs and the processing technology of tapered thin-walled parts, the smaller the width of the guide groove, the better the support strength, but the coolant flow rate decreases. Through testing and analysis, under the premise of ensuring support area and cooling effect, the optimal width design of guide groove 10a is 2~4mm, and the optimal depth design is 2~5mm.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A high-precision machining auxiliary device for conical thin-walled parts, characterized in that, Includes a rotating shaft (1), a positioning shaft (2), a support base (3), and a cooling head (4); The rotating shaft (1) is divided into a tapered support shaft section (10), a positioning shaft section (11), and a drive shaft section (12) from front to back. The tapered support shaft section (10) matches the inner tapered cavity of the tapered thin-walled part (9). The tapered support shaft section (10) has a uniform arc-shaped guide groove (10a) on its shaft surface. The guide groove (10a) extends from the front end of the tapered support shaft section (10) to the positioning shaft section (11). The positioning shaft section (11) has a number of drainage holes (11a) that are connected to each guide groove (10a). The positioning shaft (2) is located on the front side of the rotating shaft (1) to abut against the tapered thin-walled part (9) so that it is fastened to the outside of the tapered support shaft section (10). The positioning shaft (2) has a recycling channel (2a) inside. The support base (3) is located on the rear side of the rotating shaft (1). The support base (3) has a mounting hole (3a) in the middle for mounting the rotating shaft (1). The top of the support base (3) has a cooling groove (3b). The bottom of the cooling groove (3b) has a forward-digging cooling port (3c). The cooling port (3c) is directly opposite to at least one drainage hole (11a) on the top of the positioning shaft section (11). The cooling head (4) is inserted into the cooling tank (3b). The cooling head (4) is provided with a coolant channel, which is connected to the bottom cooling tank (3b) and the external coolant supply equipment.

2. The high-precision machining auxiliary device for tapered thin-walled parts according to claim 1, characterized in that, It also includes a locking nut (5) and a rotary bearing (6); the shaft (1) is installed in the mounting hole (3a) through the rotary bearing (6); the rear end of the shaft (1) is provided with an external thread, and the locking nut (5) is tightened on the external thread section and presses against the rotary bearing (6).

3. The high-precision machining auxiliary device for tapered thin-walled parts according to claim 1, characterized in that, The front opening of the guide channel (10a) is connected by an annular confluence channel (10b).

4. The high-precision machining auxiliary device for tapered thin-walled parts according to claim 1, characterized in that, The support base (3) has a positioning step hole (3d) on the front side that is coaxial with the mounting hole (3a), and the positioning shaft section (11) has a connecting shaft section on the rear side that can be embedded in the positioning step hole (3d).

5. The high-precision machining auxiliary device for tapered thin-walled parts according to claim 1, characterized in that, The guide groove (10a) has a width of 2~4mm and a depth of 2~5mm.

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