Anti-deformation vertical lathe clamp for thin ring parts

Abstract

The utility model relates to an anti-deformation vertical lathe clamp for thin ring type parts, which solves the technical problems that when the existing thin ring type parts are machined, the thin ring type parts are fixed by a traditional pull rod expansion sleeve type lathe clamp, so that the thin ring type parts are deformed, the thickness and the planeness of the thin ring type parts are easy to be out of tolerance, and the percent of pass is low. The device comprises a transition plate and a flange plate which are sleeved on a mandrel, the transition disc is fixedly connected to the flange plate, and the supporting plate is fixedly connected to the transition disc. An outer conical surface convex ring is arranged at the top of the mandrel, a convex column is arranged on the upper surface of the transition disc, and the expansion sleeve sleeves the convex ring and the convex column; the top end of the expansion sleeve is provided with an inner conical surface matched with the convex ring, the middle is of a flexible structure, and the bottom end is fixed to the transition disc 2 and located between the convex column and the supporting plate. The clamping device is used for clamping thin ring type parts with large inner diameters, large outer diameters and small thicknesses, and meanwhile deformation of the thin ring type parts is avoided.

Description

Technical Field

[0001] The utility model relates to a vertical lathe clamp, in particular to a vertical lathe clamp for preventing deformation of thin ring parts. Background Art

[0002] Thin ring parts have the characteristics of large inner and outer diameters and thin thickness, see Figure 1 , which often causes some problems in processing.

[0003] The existing processing of thin ring parts is carried out by fixing them with traditional tie rod expansion sleeve lathe fixtures, see Figure 2 The working principle of this fixture is: the pull rod moves and presses down the expansion sleeve, making the expansion sleeve tight, thereby fixing the part. However, in this fixing method, since thin ring parts are large and thin, the expansion sleeve fits tightly on the surface of the part, and the pull rod will exert downward friction on the thin ring parts, causing the parts to deform, which is easy to cause its thickness and flatness to exceed the tolerance, reducing the qualified rate of part processing.

[0004] As the requirements for machining precision of thin ring parts are increasing, this problem becomes more prominent. It is necessary to design a new type of vertical lathe fixture for thin ring parts to fix the parts while avoiding deformation caused by pressing down.

[0005] In order to prevent the thin wall of the workpiece from being deformed by pressure, the Chinese patent with publication number CN213288705U provides a vertical lathe clamp, including a positioning block, a clamp, and a workpiece; the clamp is installed on the positioning block; the clamp can adapt to workpieces of different diameters through the adjustment slot on the positioning block; the height of the pressure block is adjusted by bolts to make the clamp adapt to thin-walled workpieces of different widths, and the clamp is clamped from the end face of the workpiece by a pressure plate. However, when the clamp is used to fix and process thin ring parts, there are problems such as (1) the outer circle cannot be processed, (2) the stability of the clamp is low, and (3) it is inconvenient to use. Utility Model Content

[0006] The utility model aims to solve the technical problem that when existing thin ring parts are processed, the thin ring parts may be deformed by fixing them with traditional pull rod expansion sleeve type turning fixtures, which easily leads to excessive thickness and flatness, and thus leads to a low qualified rate, and to provide a thin ring part anti-deformation vertical turning fixture.

[0007] In order to achieve the above purpose, the technical solutions provided by the utility model are as follows:

[0008] A thin ring-type parts anti-deformation vertical lathe fixture, comprising an expansion sleeve, a support plate, and a transition plate and a flange plate which are sequentially sleeved on a mandrel from top to bottom;

[0009] The flange is used to connect with the workbench of the machine tool; the transition plate is fixedly connected to the flange; the bottom of the spindle is used to connect with the pull rod of the machine tool;

[0010] Its special features are:

[0011] The support plate is fixedly connected to the transition plate and is used to support the bottom of the thin ring parts;

[0012] A convex ring is provided on the upper part of the spindle, and the outer peripheral surface of the convex ring is an outer conical surface with a small end facing downwards;

[0013] A convex column is provided on the upper surface of the transition plate, and the convex column extends axially to a position close to the convex ring and a gap is left between the convex ring to realize the tightening of the expansion sleeve;

[0014] The expansion sleeve is mounted on the outer sides of the convex ring and the convex column;

[0015] The expansion sleeve comprises three parts, a tensioning part, a flexible part and a fixing part, which are connected in sequence from top to bottom and arranged coaxially;

[0016] The tensioning part is a circular ring structure composed of at least three fan-shaped parts. The inner circumference of the tensioning part is an inner conical surface with a small end facing downward, which is adapted and abutted with the outer conical surface of the convex ring, and the outer circumference is used to cooperate with the inner hole of the thin ring-like parts;

[0017] The flexible part is composed of thin-walled parts corresponding to the fan-shaped parts one by one, the lower ends of at least three thin-walled parts are connected to the fixed part, and a gap is provided between the thin-walled part and the convex column to achieve relative displacement between the tensioning part and the fixed part;

[0018] The fixed part is fixed on the transition plate and is located between the boss and the support plate. The flexible part and the fixed part are combined to fix the expansion sleeve on the transition plate to avoid applying downward force to thin ring parts during the tightening process.

[0019] Furthermore, at least three support seats are provided on the support plate, and the thin ring-like parts are supported by the support seats. The support seats are evenly distributed along the circumference to improve compatibility and adapt to different thin ring-like parts.

[0020] Further, the support seat is fixed to the support plate by support seat fixing screws;

[0021] The fixing part of the expansion sleeve is fixed on the transition plate by the expansion sleeve fixing screws;

[0022] The support plate is fixed on the transition plate by support plate fixing screws.

[0023] Furthermore, elastic non-metallic materials are filled between the fan-shaped parts and the thin-walled parts of the tensioning part to improve the tensioning performance.

[0024] Furthermore, the number of the fan-shaped parts of the tensioning part is 6-32.

[0025] Further,

[0026] The lower end of the convex ring is evenly provided with weight-reducing holes along the circumference to reduce weight;

[0027] The lower end of the support plate is evenly provided with weight-reducing grooves along the circumference to reduce weight;

[0028] A weight-reducing cavity is provided at the lower end of the transition plate to reduce weight and reduce interference with the machine tool.

[0029] Furthermore, an anti-rotation screw is provided on the outer circumferential surface of the flange to prevent the vertical lathe fixture from rotating, and a positioning cone surface is provided at the lower end to connect with the machine tool.

[0030] Furthermore, a chamfer is provided at the top end of the inner side surface of the support plate to reduce stress concentration and interference when installing the expansion sleeve.

[0031] Further, the support base and the corresponding support base fixing screws each have four;

[0032] There are three expansion sleeve fixing screws, evenly distributed along the circumference;

[0033] There are four supporting plate fixing screws, which are evenly distributed along the circumference.

[0034] Furthermore, the number of fan-shaped parts of the tensioning part is 6;

[0035] A cutter recess is provided at the transition point at the lower end of the boss to ensure that the fixing portion fits tightly with the transition plate.

[0036] Compared with the prior art, the utility model has the following beneficial effects:

[0037] 1. The utility model discloses a vertical lathe clamp for preventing deformation of thin ring parts. The design of the mandrel combined with a flexible expansion sleeve is adopted. The mandrel and the expansion sleeve are matched with each other in a conical surface. The mandrel is connected to the pull rod of the vertical lathe. When tightened, the mandrel produces a vertical downward displacement. The expansion sleeve is subjected to force to tighten the thin ring parts. Since the expansion sleeve is fixedly connected to the transition plate, it is tightened only by partial deformation of the flexibility, so that no vertical displacement is generated. Therefore, only radial tensioning force is applied to the parts, thereby avoiding deformation of the thin ring parts caused by the displacement of the expansion sleeve during clamping, ensuring the thickness and flatness of the thin ring parts during processing, and improving the qualified rate of the thin ring parts.

[0038] 2. The utility model discloses a vertical lathe fixture for preventing deformation of thin ring parts, which adopts a separate support seat design. The position, quantity and structure of the support seat are adjusted to support thin ring parts of different models, thereby improving the compatibility of the vertical lathe fixture.

[0039] 3. The utility model is a vertical lathe fixture for preventing deformation of thin ring parts, wherein the upper end of the expansion sleeve adopts a split ring structure, and the tensioning part is composed of multiple sectors and filled non-metallic materials, which improves the tensioning performance and ensures the strength of the expansion sleeve.

[0040] 4. The utility model provides a vertical lathe fixture for preventing deformation of thin ring parts. By arranging a weight-reducing groove at the lower end of a support plate and a weight-reducing cavity at the lower end of a transition plate, the weight of the vertical lathe fixture is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a three-dimensional structural diagram of a thin ring-type part;

[0042] Figure 2 It is a structural schematic diagram of the existing tie rod expansion sleeve lathe clamp when fixing and processing thin ring parts;

[0043] Figure 3 This is a cross-sectional structural diagram of an embodiment of a thin ring-type parts anti-deformation vertical lathe fixture of the utility model;

[0044] Figure 4 It is a cross-sectional structural diagram of a transition plate in an embodiment of the utility model;

[0045] Figure 5 It is a structural schematic diagram of a support plate in an embodiment of the utility model;

[0046] Figure 6 yes Figure 5 MM cross-sectional view;

[0047] Figure 7 This is a schematic diagram of the structure of the expansion sleeve in the embodiment of the utility model;

[0048] Figure 8 yes Figure 7 NN cross-sectional view;

[0049] Fig. 9 It is a structural schematic diagram of the central shaft in the embodiment of the utility model;

[0050] Fig.10 yes Fig. 9 AA section view;

[0051] Fig.11 It is a structural schematic diagram of the support seat in the embodiment of the utility model;

[0052] Fig.12 yes Fig.11 BB cross-sectional view.

[0053] The description of the accompanying figure numbers is as follows: 1-flange; 2-transition plate, 201-convex column, 202-weight reduction cavity; 3-support plate, 301-weight reduction groove; 4-expansion sleeve, 401-tensioning part, 402-flexible part, 403-fixing part; 5-central shaft, 501-convex ring, 502-weight reduction hole; 6-support seat; 7-support seat fixing screw; 8-expansion sleeve fixing screw; 9-support plate fixing screw. DETAILED DESCRIPTION

[0054] The specific technical solutions in the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0055] See also Figure 3 , a thin ring part anti-deformation vertical lathe fixture, including a flange 1, a transition plate 2, a support plate 3, an expansion sleeve 4, a spindle 5, four support seats 6, four support seat fixing screws 7, three expansion sleeve fixing screws 8 and four support plate fixing screws 9;

[0056] The outer circumference of the flange 1 is provided with anti-rotation screws to cooperate with the machine tool, and the lower end is provided with a positioning cone surface to connect with the working table of the machine tool;

[0057] See also Figure 4 , the transition plate 2 is fixedly connected to the flange plate 1, and a weight reduction cavity 202 is provided at the lower end;

[0058] See also Figure 5-6 The support plate 3 is fixedly connected to the transition plate 2 by four support plate fixing screws 9, and four support seats 6 are arranged at the top to support the thin ring parts. The support seats 6 are evenly distributed along the circumference and abut against and support the bottom ends of the thin ring parts;

[0059] See also Figure 11-12 , four support seats 6 are fixed on the support plate 3 by four support seat fixing screws 7 respectively;

[0060] Four support plate fixing screws 9 are evenly distributed along the circumference;

[0061] The lower end of the support plate 3 is evenly provided with weight-reducing grooves 301 along the circumferential direction, and the top of the inner side surface is chamfered;

[0062] The transition plate 2 and the flange plate 1 are sequentially mounted on the mandrel 5 from top to bottom;

[0063] See also Figure 9-10 The bottom of the mandrel 5 is used to connect with the pull rod of the machine tool, and a convex ring 501 is provided on the upper part. The outer peripheral surface of the convex ring 501 is an outer conical surface with a small end facing downward, and the lower end of the convex ring 501 is evenly provided with weight-reducing holes 502 along the circumferential direction;

[0064] A convex column 201 is provided on the upper surface of the transition plate 2. The convex column 201 extends axially to a position close to the convex ring 501 and a gap is left between the convex ring 501.

[0065] The expansion sleeve 4 is sleeved on the convex ring 501 and the convex column 201;

[0066] See also Figure 7-8 Because thin ring parts have large inner and outer diameters and thin thickness, the expansion sleeve 4 should only apply radial tension to the parts during clamping. Therefore, the expansion sleeve 4 is designed to include three parts: a tensioning part 401, a flexible part 402, and a fixed part 403, which are sequentially connected and coaxially arranged from top to bottom;

[0067] The tensioning part 401 is a circular ring structure composed of twelve sector-shaped parts, and the sectors are filled with rubber. The inner circumference of the tensioning part 401 is an inner conical surface with the small end facing downward, which abuts against the outer conical surface of the convex ring 501, and the outer circumference is matched with the inner hole of the thin ring-like parts;

[0068] The flexible portion 402 is composed of thin-walled portions corresponding to the fan-shaped portions one by one, the lower ends of at least three thin-walled portions are connected to the fixed portion 403, the thin-walled portions are filled with rubber, and a gap is provided between the thin-walled portions and the protruding column 201, so as to realize the relative displacement between the tensioning portion 401 and the fixed portion 403;

[0069] The fixing portion 403 is fixed to the transition plate 2 by three circumferentially evenly distributed expansion screws 8 and is located between the boss 201 and the support plate 3;

[0070] A cutter recess is provided at the transition point of the lower end of the boss 201 to ensure that the fixing portion 403 and the transition plate 2 are tightly fitted.

[0071] The working process of the anti-deformation vertical lathe fixture for thin ring parts in this embodiment is as follows:

[0072] (1) The spindle tie rod of the vertical lathe is loosened, and the spindle 5 moves vertically upward;

[0073] (2) As the expansion sleeve 4 and the mandrel 5 are tapered together, the expansion sleeve 4 is relaxed;

[0074] (3) Smoothly put the thin ring parts on the expansion sleeve 4 and make sure that the parts are in smooth contact with the support seat 6;

[0075] (4) The spindle tie rod of the vertical lathe is tightened, and the spindle 5 is displaced vertically downward;

[0076] (5) As the expansion sleeve 4 and the cone surface of the mandrel 5 are matched, the expansion sleeve 4 is tightened. After confirming that the thin ring parts are fixed and cannot rotate, the processing begins.

[0077] The above description is only an embodiment of the present utility model and is not intended to limit the protection scope of the present utility model. Any equivalent structural transformation made using the contents of the present utility model specification and drawings, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A thin ring-type parts anti-deformation vertical lathe fixture, comprising: An expansion sleeve (4), a support plate (3), and a transition plate (2) and a flange plate (1) which are sequentially mounted on the mandrel (5) from top to bottom; The flange (1) is used to be connected to a workbench of a machine tool; the transition plate (2) is fixedly connected to the flange (1); the bottom of the spindle (5) is used to be connected to a pull rod arranged on the machine tool; Features: The support plate (3) is fixedly connected to the transition plate (2) and is used to support the bottom of the thin ring-like parts; A convex ring (501) is provided on the upper part of the spindle (5), and the outer peripheral surface of the convex ring (501) is an outer conical surface with a small end facing downward; The upper surface of the transition plate (2) is provided with a convex column (201), which extends axially to a position close to the convex ring (501) and leaves a gap between the convex column (201) and the convex ring (501); The expansion sleeve (4) is sleeved on the outside of the convex ring (501) and the convex column (201); The expansion sleeve (4) comprises three parts, which are connected in sequence from top to bottom and are coaxially arranged: a tensioning part (401), a flexible part (402), and a fixing part (403); The tensioning part (401) is a circular ring structure composed of at least three fan-shaped parts. The inner circumference of the tensioning part (401) is an inner conical surface with a small end facing downward, which is adapted and abutted with the outer conical surface of the convex ring (501), and the outer circumference is used to cooperate with the inner hole of a thin ring-like part; The flexible portion (402) is composed of thin-walled portions corresponding to the fan-shaped portions one by one, the lower ends of at least three thin-walled portions are connected to the fixing portion (403), and a gap is provided between the thin-walled portion and the convex column (201) for achieving tensioning of the tensioning portion (401); The fixing portion (403) is fixed on the transition plate (2) and is located between the boss (201) and the support plate (3).

2. According to claim 1, a thin ring-like parts anti-deformation vertical lathe fixture is characterized by: At least three support seats (6) are arranged on the support plate (3), and the thin ring-like parts are supported by the support seats (6), and the support seats (6) are evenly distributed along the circumferential direction.

3. According to claim 2, a thin ring-like parts anti-deformation vertical lathe fixture is characterized by: The support seat (6) is fixed on the support plate (3) by means of support seat fixing screws (7); The fixing portion (403) of the expansion sleeve (4) is fixed to the transition plate (2) via expansion sleeve fixing screws (8); The support plate (3) is fixed on the transition plate (2) by means of support plate fixing screws (9).

4. A thin ring-like parts anti-deformation vertical lathe fixture according to any one of claims 1-3, characterized in that: Elastic non-metallic material is filled between the fan-shaped parts and the thin-walled parts of the tensioning part (401).

5. According to claim 4, a thin ring-like parts anti-deformation vertical lathe fixture is characterized by: The tensioning portion (401) has 6 to 32 fan-shaped parts.

6. According to claim 5, a thin ring-like parts anti-deformation vertical lathe fixture is characterized by: The lower end of the convex ring (501) is evenly provided with weight-reducing holes (502) along the circumferential direction; The lower end of the support plate (3) is evenly provided with weight-reducing grooves (301) along the circumferential direction; A weight reduction cavity (202) is provided at the lower end of the transition plate (2).

7. According to claim 6, a thin ring-like parts anti-deformation vertical lathe fixture is characterized by: The outer peripheral surface of the flange (1) is provided with an anti-rotation screw, and the lower end is provided with a positioning cone surface.

8. According to claim 7, a thin ring-like parts anti-deformation vertical lathe fixture is characterized by: The top end of the inner side surface of the support plate (3) is provided with a chamfer.

9. According to claim 3, a thin ring-like parts anti-deformation vertical lathe fixture is characterized by: The support seat (6) and the corresponding support seat fixing screws (7) are each four; There are three expansion sleeve fixing screws (8) in total, which are evenly distributed along the circumference; There are four support plate fixing screws (9) in total, which are evenly distributed along the circumference.

10. The anti-deformation vertical lathe fixture for thin ring parts according to claim 5, characterized in that: The tensioning portion (401) has 12 fan-shaped parts; A cutter recess is provided at the transition point at the lower end of the protruding column (201) to ensure that the fixing portion (403) is tightly fitted to the transition plate (2).

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