A right-angle flanging device and processing method suitable for general lathes

Abstract

The present invention provides a right-angle flanging device suitable for a universal lathe, comprising: a base plate, a support column, an inner support ring, and an outer support ring, wherein the outer support ring is arranged on the outer periphery of the inner support ring, and both the inner support ring and the outer support ring are fixed to the base plate via the support column; the bottom of the expansion block is fixed to the top of the inner support ring, and one side of the expansion block abuts against the inner side surface of the shell; the bottom of the hemming membrane is fixed to the top of the outer support ring, and one side of the hemming membrane abuts against the outer side surface of the shell; the bottom of the positioning block is fixed to the top surface of the base plate, and the top surface of the positioning block abuts against the lower bottom surface of the shell; a hob is fixed on the universal lathe, with the processing side of the hob facing the shell; and a fastening assembly, which extends outward from the axis and is fixed to the inner support ring. By ensuring that the size of the hemming membrane meets the manufacturing requirements of the right-angle flanging of the shell, the stability of the shell part processing process is improved, the part qualification rate and processing efficiency are improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing technology, and in particular to a right-angle flanging device and processing method suitable for a general lathe. Background Art

[0002] The sheet metal inner shell of a removable shell is made of martensitic stainless steel (1Cr11Ni2W2MoV). Its dimensions are outer diameter ￠765, height 276mm, thickness 1.0mm, and the flatness of both ends is required to be no more than 0.5mm. The structure of the whole ring sheet metal inner shell part after flanging is as follows: Figure 9 shown.

[0003] like Figure 8 As shown, the part that needs to be processed is the right-angle flange of the inner shell of the whole ring sheet metal. The technical requirement is to turn it to an outer diameter of ￠764 -0.5 The outer diameter is 2.0mm, and the flatness requirement is 0.5mm. The commonly used processing method involves shearing, welding, heat treatment, forming, turning, hemming, and lathing. However, after flanging on a two-axis roller machine, the flatness of the part's ends reaches 0.8 to 4mm, which does not meet welding requirements. Summary of the Invention

[0004] In view of this, the embodiments of this specification provide a right-angle flanging device and processing method suitable for a general lathe to achieve the purpose of right-angle flanging of a full-ring sheet metal inner shell.

[0005] The embodiments of this specification provide the following technical solutions:

[0006] A right-angle flanging device suitable for a universal lathe, comprising:

[0007] A processed cylindrical shell having an upper bottom surface and a lower bottom surface;

[0008] A base plate, support columns, an inner support ring and an outer support ring, wherein the outer support ring is arranged on the outer periphery of the inner support ring, and both the inner support ring and the outer support ring are fixed to the base plate through support columns;

[0009] The bottom of the expansion block is fixed to the top of the inner support ring, and one side of the expansion block abuts against the inner side of the shell. The bottom of the roll edge membrane is fixed to the top of the outer support ring, and one side of the roll edge membrane abuts against the outer side of the shell.

[0010] A positioning block is fixed on the bottom plate, and the top surface of the positioning block abuts against the bottom surface of the shell;

[0011] Hob, the hob is fixed on a universal lathe with the machining side of the hob facing the housing;

[0012] The fastening assembly extends outward from the shaft center and is fixed to the inner support ring.

[0013] Furthermore, the hob comprises:

[0014] The tool holder, roller and shaft, the tool holder is fixed to the universal lathe, and the roller is fixed to the tail end of the tool holder through the shaft.

[0015] Furthermore, the hob also includes:

[0016] Split pin and bearing, the shaft is fixed to the tool holder through the split pin, and the bearing is arranged on the outer periphery of the shaft.

[0017] Furthermore, the included angle between the central axis of the roller and the end surface H of the tire membrane of the rolled edge tire membrane is 45°.

[0018] Furthermore, the rolled tire membrane has a working arc surface, and the fillet radius of the working arc surface is equal to the profile radius of the right-angled flange of the shell.

[0019] Furthermore, the right-angle flanging device suitable for a universal lathe also includes screws, and the flanging membrane is fixed to the upper part of the outer support ring by the screws.

[0020] Furthermore, the fastening assembly includes:

[0021] A core shaft, an inner cone and a nut, wherein the core shaft is arranged at the axis center of the right-angle flanging device, the inner cone is sleeved on the outer layer of the core shaft, and the core shaft is fixed to the inner cone through the nut;

[0022] The guide block, spring and pin are fixed on the inner support ring, the pin is horizontally fixed on the side of the guide block facing the axis, one end of the spring is sleeved on the outer periphery of the pin, and the other end of the spring abuts against the expansion block.

[0023] Furthermore, the top surface of the positioning block includes an axial positioning reference surface E and an axial positioning reference surface F with a horizontal height difference, and the value of the horizontal height difference is equal to the sum of the profile radius of the right-angle flange of the shell and the wall thickness of the shell.

[0024] A method for processing a right-angle flanging comprises the following steps:

[0025] Clamp the right-angle flanging device on the faceplate of a universal lathe;

[0026] Install the housing into the right-angle flanging device so that the lower surface of the housing is in full contact with the axial positioning reference surface F of the positioning block;

[0027] Use the expansion block to tighten the inner side of the shell;

[0028] Set the hob horizontally and fasten it to the universal lathe, so that the hob contacts the end face H of the rolled membrane and align the tool;

[0029] Adjust the longitudinal support plate of the universal lathe so that the distance H between the hob and the end face of the tire membrane meets the processing requirements;

[0030] The hob is driven by a universal machine tool to move from the inside of the shell to the outside, and external pressure is applied to make the shell and the membrane end surface H of the rolled membrane fit completely;

[0031] After the upper bottom surface is flanging, remove the shell and make the upper bottom surface completely contact with the axial positioning reference surface E of the rolled tire membrane;

[0032] Use the expansion block to press the inner side of the housing and perform the subsequent steps until the lower bottom is flanged.

[0033] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0034] A general lathe is used in conjunction with a hob to roll the shell to form the shell's right-angle flanging. The size of the rolling membrane meets the manufacturing requirements of the shell's right-angle flanging, which improves the stability of the shell parts processing process, improves the parts' qualification rate and processing efficiency, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 This is a front view of a right-angle flanging device applicable to a universal lathe according to an embodiment of the present invention;

[0037] Figure 2 1. It is a top view of a right-angle flanging device applicable to a universal lathe according to an embodiment of the present invention;

[0038] Figure 3 2 is a schematic diagram of the housing structure after right-angle flanging according to an embodiment of the present invention;

[0039] Figure 4 2. It is a front view of a rolled fetal membrane according to an embodiment of the present invention;

[0040] Figure 5 yes Figure 4 An enlarged schematic diagram of the dotted line portion;

[0041] Figure 6 A top view of a rolled tire membrane according to an embodiment of the present invention;

[0042] Figure 7 A front view of a hob according to an embodiment of the present invention;

[0043] Figure 8 A front view of an expansion block according to an embodiment of the present invention;

[0044] Figure 9 A top view of an expansion block according to an embodiment of the present invention;

[0045] Figure 10 A schematic diagram of the position of a processing method according to an embodiment of the present invention;

[0046] Figure 11 Schematic diagram of the force direction of the roller cutter and the roller membrane according to an embodiment of the present invention.

[0047] Explanation of the accompanying reference numerals: 1. Base plate; 2. Support column; 3. Outer support ring; 4. Piping membrane; 401. Working arc surface; 5. Inner support ring; 6. Expansion block; 7. Guide block; 8. Pin; 9. Spring; 10. Inner cone; 11. Nut; 12. Core shaft; 13. Screw; 14. Hob; 1401. Tool holder; 1402. Roller; 1403. Shaft; 1404. Split pin; 1405. Bearing; 1406. Contact surface between roller and housing; 15. Positioning block. DETAILED DESCRIPTION

[0048] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0049] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0050] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0051] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0052] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0053] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0054] refer to Figure 1 、 Figure 2 、 Figure 8 and Figure 9 The right-angle flanging device for a universal lathe according to an embodiment of the present invention comprises a base plate 1, a support column 2, an outer support ring 3, an inner support ring 5, an expansion block 6, a flanging membrane 4, screws 13, a positioning block 15, a hob 14, and a fastening assembly. The hob 14 comprises a tool holder 1401, a roller 1402, a shaft 1403, a cotter pin 1404, and a bearing 1405. The fastening assembly comprises a guide block 7, a spring 9, a pin 8, a core shaft 12, an inner cone 10, and a nut 11.

[0055] The outer support ring 3 is arranged on the outer periphery of the inner support ring 5. Both the inner support ring 5 and the outer support ring 3 are fixed to the base plate 1 by support columns 2. The support columns 2 realize the connection between the outer support ring 3, the inner support ring 5 and the base plate 1. The bottom of the expansion block 6 is fixed to the top of the inner support ring 5, and one side of the expansion block 6 abuts the inner side surface of the shell. The inner support ring 5 realizes the function of supporting the expansion block 6. The bottom of the hemming membrane 4 is fixed to the top of the outer support ring 3 by screws 13. One side of the hemming membrane 4 abuts the outer side surface of the shell. The outer support ring 3 realizes the function of supporting the hemming membrane 4. The bottom of the positioning block 15 is fixed to the top surface of the base plate, and the top surface of the positioning block 15 abuts the lower bottom surface of the shell. The base plate 1 realizes the function of supporting the entire right-angle flanging device and the positioning block 15. The hob 14 is fixed on the universal lathe, with the processing side of the hob 14 facing the shell. The fastening assembly extends outward from the axis and is fixed to the inner support ring. The connections between the support column 2 and the base plate 1 , the support column 2 and the inner support ring 5 , the support column 2 and the outer support ring 3 , etc. are all achieved by screws.

[0056] The fastening assembly is mainly used to fix and compress the shell. The core shaft 12 is set at the axis of the right-angle flanging device, and the inner cone 10 is sleeved on the outer layer of the core shaft 12. The core shaft 12 is fixed to the inner cone 10 by the nut 11. The guide block 7 is fixed on the inner support ring 5, and the pin 8 is horizontally fixed on the side of the guide block 7 facing the axis. One end of the spring 9 is sleeved on the outer periphery of the pin 8, and the other end of the spring 9 is in contact with the tightening block 6. Among them, the guide block 7, the pin 8, and the screw 13 work together and transmit pressure through the inner cone 10 to compress the shell; the inner cone 10 and the nut 11 work together to realize the transmission of pressure; the core shaft 12 is used for centering the inner cone 10 and transmitting the pressure of the nut 11. The spring 9 is used to fine-tune the pressure in all axial directions and tighten the shell from all directions.

[0057] like Figure 4 、 Figure 5 、 Figure 6 As shown, the piping membrane 4 is the core component of this device and is connected to the outer support ring 3 via screws 13. The profile of the piping membrane 4 ensures the profile size requirements of the shell flange, that is, the fillet radius of the working arc surface 401 of the piping membrane 4 is equal to the profile radius of the right-angle flange of the shell.

[0058] The hob 14 is the core component of this device. The hob 14 is fixed on the corresponding device of the universal lathe. It applies pressure to the sheet metal cylinder through the roller 1402 to complete the right-angle flanging of the shell. Figure 7 As shown, the tool holder 1401 is fixed to the universal lathe, the roller 1402 is fixed to the tail end of the tool holder 1401 through the shaft 1403, the shaft 1403 is fixed to the tool holder 1401 through the cotter pin 1404, and the bearing 1405 is arranged on the outer periphery of the shaft 1403.

[0059] The contact surface 1406 between the roller and the housing is as follows Figure 11 As shown, the shell is moved from a horizontal position by roller 1402 in the inner diameter direction to fit with the H surface, and after flanging, the angle between it and the horizontal direction is 90 degrees. The flanging forming must meet the requirement that the part has a 90-degree angle with the horizontal direction and that the flatness with the H surface after flanging is not greater than 0.5mm. Therefore, the shell is subjected to pressure in the horizontal direction E and an axial force in the direction D at the same time. Therefore, under the forming force, a force F is applied relative to the roller 1402 to decompose it into forces E and D. Therefore, the angle between the center axis of the roller 1402 and the end face H of the rolled membrane 4 is 45°.

[0060] like Figure 3 As shown, the shell to be processed is cylindrical, and the wall thickness of the shell is about 1mm. The shell has an upper bottom surface and a lower bottom surface, and both the upper bottom surface and the lower bottom surface need to be processed with right-angle flanges.

[0061] refer to Figure 10 The top surface of the positioning block 15 includes an axial positioning reference surface E and an axial positioning reference surface F with a horizontal height difference. The edged membrane 4 has a membrane end surface H, and the flanged portion of the edged membrane is formed as shown in FIG. Figure 10 shown.

[0062] In some embodiments, a method for processing a right-angle flanging includes the following steps:

[0063] S01. Clamp the right-angle flanging device on the faceplate of a universal lathe.

[0064] Specifically, when using the right-angle flanging device of the embodiment of the present invention to process a part that is rolled and flanging (a full-ring sheet metal inner shell), the right-angle flanging device is clamped on the faceplate of a horizontal ordinary lathe.

[0065] S02. Install the housing into the right-angle flanging device so that the lower bottom surface of the housing is in complete contact with the axial positioning reference surface F of the positioning block 15.

[0066] Specifically, the housing is in complete contact with the axial positioning reference surface F of the positioning block 15 .

[0067] S03. Use the expansion block 6 to press the inner side surface of the shell. At the same time, use a tool to knock the upper bottom surface of the shell so that the lower bottom surface of the shell is in full contact with the axial positioning reference surface F.

[0068] S04, the hob 14 is horizontally arranged and fastened to the universal lathe, so that the hob 14 contacts the end surface H of the rolled tire membrane 4 and the cutter is aligned.

[0069] S05. Adjust the longitudinal support plate of the universal lathe so that the distance between the hob 14 and the end surface H of the tire membrane meets the processing requirements.

[0070] Specifically, since the angle between the central axis of the roller 1402 and the end surface H of the rolled membrane 4 is 45°, when the wall thickness of the shell is 1 mm, the distance that meets the processing requirements is calculated to be 1.42 mm according to the principle of a 45° isosceles right triangle.

[0071] S06. Use a general machine tool to drive the hob to move from the inside of the shell to the outside, and apply external pressure to make the shell and the membrane end surface H of the rolled membrane completely fit together.

[0072] Specifically, the hob 14 cuts from the inside of the part to the outside, and the horizontal support plate applies pressure to make the shell and the membrane end surface H of the rolled membrane 4 completely fit together, so that a surface with the required size can be rolled out.

[0073] S07. After the upper bottom surface is flanging, the shell is removed so that the upper bottom surface is completely in contact with the axial positioning reference surface E of the rolled tire membrane.

[0074] Specifically, the height difference between the axial positioning reference plane E and the axial positioning reference plane F is the sum of the profile radius of the right-angle flange of the shell and the wall thickness of the shell. Through this height difference, the upper bottom surface after flanged can also be completely fitted with the rolled tire membrane 4, so that the upper and lower bottom surfaces of the shell meet the total height requirement of the shell (276±0.5) after flanged.

[0075] S08. Repeat S03 to S06 until the bottom surface is flanging completed.

[0076] Specifically, after completing the flanging of one end, the shell is taken out and the flanging end surface is completely contacted with the axial positioning reference surface E, and the flanging of the other end can be completed using the same flanging method.

[0077] The flange is formed by rolling with a hob using a general lathe. The radius of the working arc surface 401 of the roll edge membrane 4 determines the radius of the outer flange of the shell ( Figure 3 The flatness of the membrane end face H determines the flatness of the rear end face of the flange. When the dimensions of the rolled membrane 4 meet the design and manufacturing requirements, the rolling force applied during the flanging is greater than the yield strength of the shell (the part being processed), the shell undergoes plastic deformation, and the shell, after flanging, fully adheres to the rolled membrane 4, achieving a surface with a flatness of 0.5mm that meets the requirements. The flatness of the right-angle flange of parts rolled and flanged using a conventional lathe has been increased from 0.8-4mm before the improvement to a maximum of 0.3mm, significantly improving the quality of the flange.

[0078] In some embodiments, the material used for the roller of the hob in the flanging device of the embodiment of the present invention is Cr12MoV cold working die steel, the cotter pins, bearings, springs, screws, pins, etc. are all standard parts, and the remaining parts are made of 45 carbon steel material (HRC35-40) and are processed according to fixed dimensions.

[0079] Beneficial effects of the embodiments of the present invention:

[0080] The right-angle flanging device of the embodiment of the present invention has a reasonable and concise structure, is easy to operate, saves effort and time, and is highly reliable. It effectively solves the problem of large springback of the right-angle flanging of sheet metal shells that does not meet dimensional requirements. It enables the same device to use different heights and axial positioning of the two ends of the right-angle flanging. The hob adopts a 45° angled structure of a roller with bearings and cooperates with the right-angle flanging processing device of a conventional lathe, solving the problem of flatness deformation of the right-angle flanging. It improves the stability of the sheet metal shell part processing process, improves the part qualification rate and processing efficiency, greatly reduces production costs, and improves company benefits, with great practical value.

[0081] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences from other embodiments. In particular, the method embodiments described later are relatively simple to describe because they correspond to the system. For relevant parts, refer to the description of the system embodiments.

[0082] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A right-angle flanging device suitable for a general lathe, characterized in that: include: A processed cylindrical shell having an upper bottom surface and a lower bottom surface; A base plate (1), a support column (2), an inner support ring (5) and an outer support ring (3), wherein the outer support ring (3) is arranged on the outer periphery of the inner support ring (5), and both the inner support ring (5) and the outer support ring (3) are fixed to the base plate (1) via the support column (2); An expansion block (6) and a rolled tire membrane (4), wherein the bottom of the expansion block (6) is fixed to the top of the inner support ring (5), and one side of the expansion block (6) abuts against the inner side surface of the shell; the bottom of the rolled tire membrane (4) is fixed to the top of the outer support ring (3), and one side of the rolled tire membrane (4) abuts against the outer side surface of the shell; A positioning block (15), the positioning block (15) is fixed on the bottom plate (1), and the top surface of the positioning block (15) includes an axial positioning reference surface E and an axial positioning reference surface F with a horizontal height difference, wherein the value of the horizontal height difference is equal to the sum of the profile radius of the right-angle flange of the shell and the wall thickness of the shell; The axial positioning reference surface E is used to abut against the lower bottom surface of the housing; The axial positioning reference surface F is used to abut against the upper bottom surface of the housing; A hob (14), the hob (14) being fixed on the universal lathe, with the processing side of the hob (14) facing the housing; A fastening assembly extending outward from the axis and fixed to the inner support ring (5); The hob (14) includes a roller (1402), and the included angle between the central axis of the roller (1402) and the end surface H of the tire membrane (4) is 45°.

2. The right-angle flanging device suitable for a universal lathe according to claim 1, characterized in that: The hob (14) also includes: The tool holder (1401) and the shaft (1403) are fixed to the universal lathe, and the roller (1402) is fixed to the tail end of the tool holder (1401) through the shaft (1403).

3. The right-angle flanging device suitable for a universal lathe according to claim 2, characterized in that: The hob (14) also includes: A cotter pin (1404) and a bearing (1405), wherein the shaft (1403) is fixed to the tool holder (1401) via the cotter pin (1404), and the bearing (1405) is arranged on the outer periphery of the shaft (1403).

4. The right-angle flanging device suitable for a universal lathe according to claim 1, characterized in that: The rolled edge membrane (4) has a working arc surface (401), and the fillet radius of the working arc surface (401) is equal to the profile radius of the right-angled flange of the shell.

5. The right-angle flanging device suitable for a universal lathe according to claim 1, characterized in that: The right-angle flanging device suitable for a universal lathe further comprises screws (13), and the flanging membrane (4) is fixed to the upper part of the outer support ring (3) via the screws (13).

6. The right-angle flanging device suitable for a universal lathe according to claim 1, characterized in that: The fastening assembly comprises: A core shaft (12), an inner cone (10) and a nut (11), wherein the core shaft (12) is arranged at the axis of the right-angle flanging device, the inner cone (10) is sleeved on the outer layer of the core shaft (12), and the core shaft (12) is fixed to the inner cone (10) through the nut (11); A guide block (7), a spring (9) and a pin (8), wherein the guide block (7) is fixed on the inner support ring (5), the pin (8) is horizontally fixed on the side of the guide block (7) facing the axis, one end of the spring (9) is sleeved on the outer periphery of the pin (8), and the other end of the spring (9) is in contact with the expansion block (6).

7. A method for processing right-angle flanging, applied to a right-angle flanging device suitable for a universal lathe according to any one of claims 1 to 6, characterized in that: The processing method comprises the following steps: Clamping the right-angle flanging device on the faceplate of the universal lathe; The housing is installed in the right-angle flanging device so that the lower bottom surface of the housing is in complete contact with the axial positioning reference surface F of the positioning block (15); Using a tightening block (6) to tighten the inner side surface of the shell; The hob (14) is horizontally arranged and fastened to the universal lathe, so that the hob (14) contacts the end surface H of the roll edge membrane (4) and aligns the cutter; Adjusting the longitudinal support plate of the universal lathe so that the distance between the hob (14) and the end surface H of the fetal membrane meets the processing requirements; The universal lathe drives the hob (14) to move from the inside of the shell toward the outside, and external pressure is applied to completely fit the shell to the end face H of the rolled membrane (4); After the upper bottom surface is flanging, the shell is removed to completely contact the upper bottom surface with the axial positioning reference surface E of the rolled fetal membrane (4); The inner side surface of the shell is compressed using an expansion block (6) and subsequent steps are performed until the lower bottom surface is flanging completed.

Images