Machining fixture for thin-walled workpieces
The combined structure of the rear bearing block, bearing platform, and central column solves the problem of easy damage to thin-walled workpiece flanges during processing, achieves stable fixation of the blank, and ensures smooth processing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING IND TECHNICIAN COLLEGE (BEIJING IND ADVANCED TECH SCHOOL)
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-14
Smart Images
Figure CN224488415U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining tooling technology, and in particular to a machining tooling for thin-walled workpieces. Background Technology
[0002] During workpiece machining, the blank is usually fixed on a lathe. Taking CNC machining centers as an example, the blank is often held by the jaws of a chuck for machining, especially for round workpieces, which can play a role in automatic centering.
[0003] Figure 1 This is a structural schematic diagram of a thin-walled workpiece. Figure 2 This is another structural schematic diagram of a thin-walled workpiece. The thin-walled workpiece 1 includes an integrally formed flange 11 and a sleeve 12. Both the flange 11 and the sleeve 12 are thin-walled. The bottom of the flange 11 may also be provided with a positioning groove 13. This thin-walled workpiece can be used as a bushing, etc.
[0004] During machining, flange 11 is thin and has low strength. As cutting progresses, flange 11 is easily damaged when it is fixed with a chuck. However, if the chuck clamping force is too weak, it cannot provide a fixing effect, and machining cannot proceed.
[0005] Therefore, a machining tool is needed to solve the above problems. Utility Model Content
[0006] The summary section of this utility model is intended to briefly introduce the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.
[0007] This invention provides a machining fixture for thin-walled workpieces to solve the technical problems mentioned in the background section above.
[0008] This utility model discloses a machining fixture for thin-walled workpieces, comprising a rear support block, a support platform, and a central column, wherein...
[0009] After the blank is installed onto the processing fixture, the rear support block is fixedly connected to the support platform, the blank is placed on the support platform, and the central column is inserted into the support platform and fixedly connected to the rear support block.
[0010] The inner wall of the support platform and the outer wall of the central column are wedge-shaped to fit each other. As the central column is inserted, it can squeeze the support platform outward, so that the support platform is tightly connected to the blank.
[0011] During the processing, the chuck clamps the rear bearing block.
[0012] The above embodiments of this utility model have the following beneficial effects:
[0013] When the blank is installed onto the machining fixture, the aforementioned rear support block is fixedly connected to the bearing platform, the blank is placed on the bearing platform, and the central column is inserted into the bearing platform and fixedly connected to the rear support block. Due to the wedge-shaped setting of the central column, it can squeeze the bearing platform outward, so that the bearing platform and the blank are tightly connected, thereby completing the fixation of the blank and avoiding relative displacement between the blank and the machining fixture, thus improving the reliability of the machining fixture.
[0014] During the machining process, the chuck clamps the rear bearing block, which, compared to directly clamping the flange, can prevent the flange from being damaged and ensure the smooth progress of the machining. Attached Figure Description
[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 A schematic diagram of a thin-walled workpiece;
[0017] Figure 2 This is another structural schematic diagram of a thin-walled workpiece;
[0018] Figure 3 This is an exploded view of one embodiment of the machining tooling for thin-walled workpieces according to the present invention;
[0019] Figure 4 This is a cross-sectional view of one embodiment of the machining fixture for thin-walled workpieces according to the present invention;
[0020] Figure 5 This is a schematic diagram of the structure of one embodiment of the rear bearing block of this utility model;
[0021] Figure 6 This is a schematic diagram of the structure of one embodiment of the support platform of this utility model;
[0022] Figure 7 This is a structural schematic diagram of one embodiment of the central column of this utility model.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Thin-walled workpiece; 11. Flange; 12. Sleeve; 13. Positioning groove;
[0025] 2. Rear bearing block; 21. First threaded hole; 22. Second threaded hole; 23. Positioning boss;
[0026] 3. Foundation; 31. Base plate; 311. Through hole; 312. Countersunk hole; 32. Positioning cylinder; 321. Strip groove;
[0027] 4. Central column; 41. Bolt rod; 42. Extrusion block; 43. Bolt head. Detailed Implementation
[0028] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.
[0032] Please see Figure 3 and Figure 4 , Figure 3 This is an exploded view of one embodiment of the machining tooling for thin-walled workpieces according to the present invention; Figure 4This is a cross-sectional view of one embodiment of the machining fixture for thin-walled workpieces according to this utility model. Figure 3 and Figure 4 As shown, the machining fixture for thin-walled workpieces of this utility model includes a rear support block 2, a support platform 3, and a central column 4. When the blank is installed onto the machining fixture, the rear support block 2 is fixedly connected to the support platform 3, the blank is placed on the support platform 3, and the central column 4 is inserted into the support platform 3 and fixedly connected to the rear support block 2, while also pressing the support platform 3 outward, so that the support platform 3 and the blank are tightly connected, thereby completing the fixation of the blank and preventing relative displacement between the blank and the machining fixture, thus improving the reliability of the machining fixture. During the machining process, the chuck clamps the rear support block 2, which, compared to directly clamping the flange 11, can prevent damage to the flange 11 and ensure smooth machining.
[0033] Please see Figure 5 , Figure 5 This is a structural schematic diagram of one embodiment of the rear bearing block of this utility model. Figure 5 As shown, the rear bearing block 2 is circular, with a first threaded hole 21 in the center for connection with the central column 4. On the right end face of the rear bearing block 2 ( Figure 5 A plurality of second threaded holes 22 are provided around the first threaded hole 21 (in the direction of the center) for connection with the bearing platform 3. It should be noted that the rear bearing block 2 has a certain thickness to ensure strength. During the processing, the jaws of the chuck clamp the side wall of the rear bearing block 2.
[0034] Please see Figure 6 , Figure 6 This is a structural schematic diagram of one embodiment of the support platform of this utility model. Figure 6 As shown, the support platform 3 includes a base plate 31 and a positioning cylinder 32. A through hole 311 is provided on the base plate 31, the size of which corresponds to the first threaded hole 21. Multiple countersunk holes 312, corresponding to the second threaded hole 22, are provided around the through hole 311. In the assembled state, the base plate 31 is connected to the second threaded hole 22 by multiple bolts passing through the corresponding countersunk holes 312, thus fixing the base plate 31 to the right end face of the rear support block 2.
[0035] The aforementioned positioning cylinder 32 is fixedly connected to the base plate 31. The outer wall of the positioning cylinder 32 is perpendicular to the base plate 31, and the dimensions of the outer wall of the positioning cylinder 32 correspond to the inner diameter of the sleeve 12 of the blank. The inner wall of the positioning cylinder 32 runs from left to right... Figure 6 The inner wall of the positioning cylinder 32 gradually slopes upwards and downwards, and the angle between the inner wall of the positioning cylinder 32 and the axis of the positioning cylinder 32 can be 4°. Furthermore, multiple strip grooves 321 are evenly provided on the positioning cylinder 32, and the direction of the strip grooves 321 is parallel to the axis of the support platform 3.
[0036] Please see Figure 7 , Figure 7This is a structural schematic diagram of one embodiment of the central column of this utility model. Figure 7 As shown, the central column 4 includes a bolt rod 41, a pressing block 42, and a bolt head 43 connected in sequence. The bolt rod 41 is fitted with the first threaded hole 21, meaning the bolt rod 41 can pass through the through hole 311 and be threaded into the first threaded hole 21. The outer circumference of the pressing block 42 is a wedge-shaped surface, which fits the inner wall of the positioning cylinder 32. The bolt head 43 is fixed to the right end of the pressing block 42. Figure 7 (In the direction of the middle), the worker can rotate the extrusion block 42 with a tool to connect the bolt rod 41 with the first threaded hole 21.
[0037] The blank can be a semi-finished product made from a metal bar that has already been processed to form a relatively thick flange 11 and sleeve 12. The inner diameter of the sleeve 12 of the blank is machined to be the same as the inner diameter of the sleeve 12 of the thin-walled workpiece 1. Next, the blank needs to be further processed to reduce the thickness of the flange 11 and sleeve 12.
[0038] To assemble the blank onto the tooling, firstly, multiple bolts are passed through the countersunk hole 312 and the second threaded hole 22 to fix the base 3 and the rear support block 2 in place. Next, the blank is placed onto the base 3. Then, the central column 4 is inserted into the positioning cylinder 32. The operator uses a tool to rotate the bolt head 43, causing the bolt shank 41 to pass through the through hole 311 of the base 3 and be threaded into the first threaded hole 21 of the rear support block 2. As the bolt head 43 is rotated, the pressing block 42 continuously presses against the positioning cylinder 32. Due to the slotted groove 321, the positioning cylinder 32 presses against the inner wall of the sleeve 12 of the blank outward. In this way, the sleeve 12 and the positioning cylinder 32 are tightly engaged, completing the fixation of the blank and preventing relative displacement between the blank and the machining tooling, thus improving the reliability of the machining tooling.
[0039] If the flange 11 of the blank is provided with a positioning groove 13 at the bottom, a positioning boss 23 can also be provided on the surface of the rear bearing block 2 accordingly, so that the positioning groove 13 and the positioning boss 23 are tightly engaged.
[0040] The tooling with the blank installed is clamped by the chuck to hold the bearing block 2, thus completing the machining of the thin-walled workpiece 1. Next, the flange 11 and sleeve 12 of the blank are further cut to complete the machining of the thin-walled workpiece 1. In this way, the flange 11 can be avoided from being easily damaged by the chuck as it becomes thinner during cutting, thus improving the reliability of machining the thin-walled workpiece 1.
[0041] 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 it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A machining fixture for thin-walled workpieces, characterized in that, Including the rear bearing block, bearing cap, and central column, among which, After the blank is installed onto the processing fixture, the rear support block is fixedly connected to the support platform, the blank is placed on the support platform, and the central column is inserted into the support platform and fixedly connected to the rear support block. The inner wall of the support platform and the outer wall of the central column are wedge-shaped to fit each other. As the central column is inserted, it can squeeze the support platform outward, so that the support platform is tightly connected to the blank. During the processing, the chuck clamps the rear bearing block.
2. The machining fixture for thin-walled workpieces according to claim 1, characterized in that, The rear bearing block has a first threaded hole in the middle for connecting with the central column; The rear bearing block is provided with a plurality of second threaded holes around the first threaded hole, and the second threaded holes are used to connect with the bearing platform.
3. The machining fixture for thin-walled workpieces according to claim 2, characterized in that, The support platform includes a fixedly connected base plate and a positioning cylinder. The base plate has a through hole and a plurality of countersunk holes corresponding to the second threaded hole are arranged around the through hole. In the assembled state, the base plate is connected to the second threaded hole by multiple bolts passing through the corresponding countersunk holes, so that the base plate is fixedly connected to the rear support block.
4. The machining fixture for thin-walled workpieces according to claim 3, characterized in that, The size of the through hole corresponds to that of the first threaded hole.
5. The machining fixture for thin-walled workpieces according to claim 4, characterized in that, The outer wall of the positioning cylinder is perpendicular to the bottom plate, and the size of the outer wall of the positioning cylinder corresponds to the inner diameter of the sleeve of the blank. The inner wall of the positioning cylinder gradually slopes to both sides in the direction away from the bottom plate.
6. The machining fixture for thin-walled workpieces according to claim 5, characterized in that, Multiple strip grooves are evenly formed on the positioning cylinder, and the direction of the strip grooves is parallel to the axial direction of the support.
7. The machining fixture for thin-walled workpieces according to claim 6, characterized in that, The angle between the inner wall of the positioning cylinder and the axis of the positioning cylinder is 4°.
8. The machining fixture for thin-walled workpieces according to claim 6, characterized in that, The central column includes a bolt rod, an extrusion block, and a bolt head connected in sequence; In the assembled state, the bolt rod passes through the through hole and is threaded into the first threaded hole.
9. The machining fixture for thin-walled workpieces according to claim 8, characterized in that, The outer circumference of the extrusion block is wedge-shaped and is adapted to the inner wall of the positioning cylinder.
10. The machining fixture for thin-walled workpieces according to any one of claims 1-9, characterized in that, The thickness of the flange and sleeve included in the blank is greater than that of the thin-walled workpiece, and the inner diameter of the blank sleeve is the same as that of the sleeve of the thin-walled workpiece.