A lathe fixture for machining a conical thin-walled part

Abstract

The utility model discloses a lathe clamp for conical thin wall part machining is including tensioning nut, base, spring, taper mandrel, compression nut, and part is fixed through compression nut, taper mandrel and base, and compression nut is provided with the internal thread matched with part, can effectively prevent loosening when part processing, and the taper surface of taper mandrel is pasted with part inner chamber, and supports part, guarantees that part does not produce relative movement with main shaft in the processing process. Base and taper mandrel, compression nut all adopt axle, hole micro -gap cooperation, and the center distance of part and main shaft in the prescribed range is finally guaranteed in two place cooperation clearance, and the problem of uneven part wall thickness is solved. After part processing is completed, loosens compression nut, can realize the replacement to part, and the operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of process equipment in the machinery manufacturing industry, and in particular to a lathe fixture for machining tapered thin-walled parts. Background Technology

[0002] A certain series of parts have a conical structure, with a large quantity and variety. The required wall thickness of the conical surface is between 0.35 and 0.76 mm, and uniform wall thickness must be ensured. Machining thin-walled parts mainly considers two aspects: clamping deformation and machining deformation. Currently, this type of part is machined using a bushing clamping method. The bushing clamping method has drawbacks in machining this part: the uniformity of the part's wall thickness depends mainly on the positioning accuracy of the bushing and the part itself; the thin wall makes it prone to clamping deformation; and the lack of internal support during machining poses a risk of machining deformation.

[0003] This series of parts has a large number of components. In order to ensure the quality of the finished parts, it is necessary to design a lathe fixture for machining tapered thin-walled parts to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a lathe fixture for machining tapered thin-walled parts, thereby solving the problem of part deformation and improving machining efficiency.

[0005] This utility model provides a lathe fixture for machining tapered thin-walled parts, including a tension nut, a base, a spring, a tapered mandrel, and a clamping nut. The base and the tapered mandrel are fitted with a shaft-hole micro-clearance fit, and the extension of the tapered mandrel is fixed and adjusted by the tension nut. The base has a center hole and is fitted onto the tapered mandrel. The spring is disposed between the base and the tapered mandrel. One end of the tapered mandrel is threaded to the tension nut, and the other end passes into the part. The part is fixed to the end face of the base by the clamping nut. The tension nut, base, spring, tapered mandrel, clamping nut, and part are arranged coaxially.

[0006] Furthermore, the tapered mandrel has a tapered section at one end and a stepped section at the other end, with the tapered and stepped sections coaxial. The stepped section consists of a first-stage, second-stage, and third-stage stepped section with diameters increasing sequentially from the end. The tapered section has several annular grooves along its circumference. The center hole of the base is a four-stage stepped hole, including a first-stage hole and second-stage, third-stage, and fourth-stage holes with progressively increasing diameters. The diameter of the first-stage hole is clearance-fitted with the outer diameter of the tensioning nut, and the inner diameter of the tensioning nut is threadedly fitted with the outer diameter of the first-stage stepped section. The second-stage hole has a slight clearance fit with a portion of the second-stage stepped section of the tapered mandrel. The third-stage hole has a spring clearance fit with the remaining second-stage stepped section. The diameter of the fourth-stage hole has a clearance fit with the third-stage stepped section. The outer conical surface of the tapered section of the tapered mandrel is in contact with the inner conical surface of the part. The clamping force of the part is controlled by spring compression, and the part can be replaced by loosening the clamping nut.

[0007] Furthermore, the outer side of the base is provided with an external thread that engages with the internal thread of one end of the clamping nut, and the internal thread of the other end of the clamping nut engages with the external thread of the large diameter end of the part.

[0008] The beneficial effects of this utility model are:

[0009] This utility model relates to a lathe fixture for machining conical thin-walled parts. It improves the positioning and clamping methods of the parts. The fixture has high positioning accuracy and low clamping force. It can effectively support the parts during the machining process. The parts are easy to replace, easy to operate, require less skill from the operator, have low processing costs, and high processing efficiency. Attached Figure Description

[0010] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0011] Figure 1 A schematic diagram of the lathe fixture for machining tapered thin-walled parts provided by this utility model;

[0012] Figure 2 A schematic diagram of the tapered mandrel provided by this utility model;

[0013] Figure 3 A schematic diagram of the structure of the base provided by this utility model;

[0014] Figure 4 A schematic diagram of the structure of the clamping nut provided by this utility model;

[0015] Figure 5 This is a schematic diagram of the structure of the tension nut provided by this utility model;

[0016] In the attached diagram: 1 - Tensioning nut

[0017] 2-Base, 201-Primary hole section, 202-Secondary hole section, 203-Tertiary hole section, 204-Fourth hole section

[0018] 3-Spring

[0019] 4-Tapered mandrel, 401-Tapered section, 401.1-Annular groove, 402-Stepped section, 402.1-First-level stepped section, 402.2-Second-level stepped section, 402.3-Third-level stepped section

[0020] 5-Clamping nut

[0021] 6-Parts. Detailed Implementation

[0022] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0023] Please see Figure 1-5 The figure shows a schematic diagram of a lathe fixture structure for machining tapered thin-walled parts provided by this utility model. It includes a tension nut 1, a base 2, a spring 3, a tapered mandrel 4, and a clamping nut 5. The base 2 has a central hole and is fitted onto the tapered mandrel 4. The spring 3 is positioned between the base 2 and the tapered mandrel 4. One end of the tapered mandrel 4 is threaded to the tension nut 1, and the other end passes into the part 6. The clamping nut 5 fixes the part 6 to the end face of the base 2. The tension nut 1, base 2, spring 3, tapered mandrel 4, clamping nut 5, and part 6 are coaxially arranged.

[0024] One end of the tapered mandrel 4 is a tapered section 401, and the other end is a stepped section 402. The tapered section 401 and the stepped section 402 are coaxial. The stepped section 402 has a diameter that increases sequentially from the end, consisting of a first-level stepped section 402.1, a second-level stepped section 402.2, and a third-level stepped section 402.3. The tapered section 401 has several annular grooves 401.1 circumferentially. The tapered surface has a segmented structure, which effectively increases the number of support points for the part while facilitating the discharge of gas from the internal cavity when the part is loaded into the fixture. The center hole of the base 2 is arranged in a four-stage stepped hole configuration, including a primary hole segment 201 and secondary hole segments 202, tertiary hole segments 203, and quaternary hole segments 204 with progressively increasing diameters. The diameter of the primary hole segment 201 is clearance-fitted with the outer diameter of the tensioning nut 1, and the inner diameter of the tensioning nut 1 is threadedly fitted with the outer diameter of the primary stepped segment 402.1. The secondary hole segment 202 is slightly clearance-fitted with a portion of the secondary stepped segment 402.2 of the tapered mandrel 4. A spring 3 is provided for clearance-fitted between the tertiary hole segment 203 and the remaining secondary stepped segment 402.2. The diameter of the quaternary hole segment 204 is clearance-fitted with the tertiary stepped segment 402.3. The outer conical surface of the tapered segment 401 of the tapered mandrel 4 is in contact with the inner conical surface of the part, supporting the part and ensuring that the part does not move relative to the spindle during processing. The outer side of the base 2 is provided with an external thread that engages with the internal thread of one end of the clamping nut 5. The internal thread of the other end of the clamping nut 5 engages with the external thread of the large diameter end of the part. This thread only serves a connecting function and can effectively prevent loosening during the processing of the part.

[0025] The extension of the tapered spindle 4 is fixed and adjusted by the tension nut 1, and the clamping force of the part is controlled by the compression of the spring 3. The clamping nut 5 and the base 2 adopt a shaft and hole micro-clear clearance fit, and the thread only serves as a connection. The two fit clearances ultimately ensure that the distance between the center of the part and the center of the spindle is within the specified range, thus solving the problem of uneven wall thickness of the part.

[0026] After the part is processed, the part 6 can be replaced by loosening the clamping nut 5. The operation is simple and requires little skill from the operator.

[0027] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, are all covered within the scope of the claims of this utility model.

Claims

1. A lathe fixture for machining tapered thin-walled parts, characterized in that: The device includes a tension nut (1), a base (2), a spring (3), a tapered spindle (4), and a clamping nut (5). The base (2) has a central hole and is fitted onto the tapered spindle (4). The spring (3) is positioned between the base (2) and the tapered spindle (4). One end of the tapered spindle (4) is threaded to the tension nut (1), and the other end is inserted into the part (6). The part (6) is fixed to the end face of the base (2) by the clamping nut (5). The tension nut (1), base (2), spring (3), tapered spindle (4), clamping nut (5), and part (6) are coaxially arranged.

2. The lathe fixture for machining tapered thin-walled parts according to claim 1, characterized in that: The tapered mandrel (4) has a tapered section (401) at one end and a stepped section (402) at the other end. The tapered section (401) and the stepped section (402) are coaxial. The stepped section (402) is a first-level stepped section (402.1), a second-level stepped section (402.2), and a third-level stepped section (402.3) with the diameter increasing sequentially from the end. The tapered section (401) has several annular grooves (401.1) along the circumference.

3. The lathe fixture for machining tapered thin-walled parts according to claim 2, characterized in that: The center hole of the base (2) is set in a four-stage stepped hole configuration, including a first-stage hole section (201) and a second-stage hole section (202), a third-stage hole section (203), and a fourth-stage hole section (204) with progressively increasing diameters. The diameter of the first-stage hole section (201) is clearance-fitted with the outer diameter of the tension nut (1), and the inner diameter of the tension nut (1) is thread-fitted with the outer diameter of the first-stage stepped section (402.1). The second-stage hole section (202) is slightly clearance-fitted with a portion of the second-stage stepped section (402.2) of the tapered mandrel (4). The third-stage hole section (203) is clearance-fitted with the remaining second-stage stepped section (402.2) by a spring (3). The diameter of the fourth-stage hole section (204) is clearance-fitted with the third-stage stepped section (402.3). The outer conical surface of the tapered section (401) of the tapered mandrel (4) is in contact with the inner conical surface of the part.

4. The lathe fixture for machining tapered thin-walled parts according to claim 1, characterized in that: The base (2) has an external thread on its outer side that engages with the internal thread at one end of the clamping nut (5), and the internal thread at the other end of the clamping nut (5) engages with the external thread at the large diameter end of the part.

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