Turning tool for ultrathin hood parts

Abstract

The utility model provides an ultrathin hood part turning tool. The ultrathin hood part turning tool comprises a tool body used for being fixedly connected with the open end of an ultrathin hood part. The tool body comprises a first circular boss used for being matched with the inner wall of an opening of the ultrathin hood part, a plurality of radial threaded holes are evenly formed in the first circular boss in the radial direction, the radial threaded holes are matched with through holes in the ultrathin hood part through bolts, a second circular boss is arranged at the large end of the first circular boss, and the second circular boss is arranged at the large end of the second circular boss. A third circular boss is arranged at the large end of the second circular boss; a first positioning end face is formed between the first circular boss and the second circular boss, and a second positioning end face is formed between the second circular boss and the third circular boss. The tool can be used for turning ultrathin hood parts, the machining precision and the surface quality are guaranteed, and the technical problems of clamping of the ultrathin parts and'cutter shaking in machining 'are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, and mainly relates to a turning tool for ultra-thin head cover parts. Background Art

[0002] With the trend toward lightweight design across various equipment, many parts in the aerospace and medical device sectors are adopting ultra-thin designs, significantly increasing machining difficulty. The head cover parts targeted in this study had an outer diameter of 424 mm, a length of 255 mm, and a wall thickness of only 1.2 mm. The acceptance standard for wall thickness was 1.2 ± 0.05 mm. Three batches procured using spinning failed to meet the acceptance criteria, necessitating conventional turning to achieve the required machining accuracy. Existing machining methods suffer from tool chatter, which in turn compromises machining accuracy. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a turning tool for ultra-thin hood-like parts. This tool can be used for turning ultra-thin hood-like parts, ensuring processing accuracy and surface quality, and solving the technical problems of ultra-thin parts clamping and "processing chattering tool".

[0004] In order to achieve the above technical features, the purpose of the present utility model is achieved as follows: a tool for turning ultra-thin head cover parts, comprising a tool body for fixing and connecting the open end of the ultra-thin head cover parts;

[0005] The tooling body includes a first circular boss for matching with the inner wall of the opening of the ultra-thin head cover part, the first circular boss is evenly processed with a plurality of radial threaded holes in the radial direction, the radial threaded holes are matched with the through holes on the ultra-thin head cover part through bolts, the large end of the first circular boss is provided with a second circular boss, and the large end of the second circular boss is provided with a third circular boss;

[0006] A first positioning end surface is formed between the first circular boss and the second circular boss, and a second positioning end surface is formed between the second circular boss and the third circular boss.

[0007] An assembly chamfer is provided at the end of the first circular boss.

[0008] The through hole is arranged on the outer circle of the large end opening of the ultra-thin head cover part.

[0009] The end surface of the tool body is processed with a plurality of material-reducing through holes that are evenly arranged along the axis.

[0010] During processing, the interior of the ultra-thin head cover part is filled with paraffin wax, and the paraffin wax is melted and taken out after the outer circle processing is completed.

[0011] During processing, a washer is provided between the bolt and the tool body.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model provides a turning tool for ultra-thin head cover parts, which can be used for turning ultra-thin head cover parts, ensuring processing accuracy and surface quality, and solving the technical problems of ultra-thin parts clamping and "processing tool chattering".

[0014] 2. To address the problem of "tool chattering during machining", we use the method of rough turning the outer circle with sufficient allowance, and then install the tooling for fine machining of the inner hole and pour industrial paraffin wax into the tooling cavity. After the paraffin cools, the inner wall of the workpiece is completely filled to ensure sufficient rigidity when fine machining the outer circle.

[0015] 3. Due to the high thermal expansion coefficient of aluminum alloy, the clearance between the outer diameter of the installation reference and the inner hole of the actual head cover can be between 0-0.03. At the same time, the tooling design has a calibration and tool setting reference. Four lightening holes are opened on the tooling body to add paraffin and discharge melted paraffin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is the overall structure diagram of the utility model.

[0018] Figure 2 This is a structural diagram of the ultra-thin hood parts of this utility model.

[0019] Figure 3 This is the structural diagram of the tooling body of this utility model.

[0020] Figure 4 It is a side view of the tool body of the utility model.

[0021] In the figure: ultra-thin head cover parts 1, paraffin 2, large end opening outer circle 3, washer 4, bolt 5, radial threaded hole 6, tooling body 7, material reduction through hole 8, assembly chamfer 9, first circular boss 10, first positioning end face 11, second circular boss 12, second positioning end face 13, third circular boss 14, through hole 15, end face center hole 16. DETAILED DESCRIPTION

[0022] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0023] Example 1:

[0024] See also Figure 1-4 ,

[0025] 1. Study the processing object and determine the processing plan:

[0026] These parts are made of aluminum alloy, with tolerances applied to both the outer diameter and inner bore. They have a wall thickness of 1.2±0.05 and a surface roughness ranging from Ra1.6 to 3.2. To address the clamping challenge, the finished product is machined with a toleranced inner bore. The inner bore is used for positioning during finish turning of the outer diameter. Four apertures on the outer diameter of the workpiece are secured with M5 hexagon socket screws to eliminate clamping distortion and maintain form and position tolerances. To address the "chattering tool" challenge, the outer diameter is rough-turned with sufficient clearance. After finishing the inner bore, the tooling is installed and industrial paraffin is poured into the tooling cavity. Once the paraffin cools, the inner wall of the workpiece is completely filled, ensuring sufficient rigidity for finish turning of the outer diameter.

[0027] 2. Design and production of tooling:

[0028] Due to the high thermal expansion coefficient of aluminum alloy, the clearance between the outer circle of the installation reference and the inner hole of the actual head cover can be between 0-0.03. At the same time, the tooling design has a calibration and tool setting reference. 4 lightening holes are opened on the tooling body and used to add paraffin and discharge melted paraffin. 4 M5 screw holes are machined on the positioning outer circle and engraved to facilitate centering during installation. For details on tooling and clamping methods, see Figure 1 、 2 .

[0029] Example 2:

[0030] A tool for turning ultra-thin hood-like parts includes a tool body 7 for fixing and connecting the open end of an ultra-thin hood-like part 1; the tool body 7 includes a first circular boss 10 for mating with the inner wall of the opening of the ultra-thin hood-like part 1, the first circular boss 10 being uniformly machined with a plurality of radial threaded holes 6 in the radial direction, the radial threaded holes 6 mating with through holes 15 on the ultra-thin hood-like part 1 via bolts 5, a second circular boss 12 being provided at the large end of the first circular boss 10, and a third circular boss 14 being provided at the large end of the second circular boss 12; a first positioning end face 11 being formed between the first circular boss 10 and the second circular boss 12, and a second positioning end face 13 being formed between the second circular boss 12 and the third circular boss 14. This tool can be used for turning ultra-thin hood-like parts, ensuring machining accuracy and surface quality, and solving the technical problems of ultra-thin part clamping and "processing tool chattering."

[0031] Furthermore, the end portion of the first circular boss 10 is provided with an assembly chamfer 9. The assembly chamfer 9 facilitates subsequent clamping.

[0032] Furthermore, the through hole 15 is provided on the outer circle 3 of the large end opening of the ultra-thin head cover part 1. The through hole 15 facilitates the reliable connection between the subsequent tooling body 7 and the ultra-thin head cover part 1.

[0033] Furthermore, the end surface of the tool body 7 is processed with a plurality of material-reducing through holes 8 evenly arranged along the axis. The material-reducing through holes 8 facilitate the subsequent injection of paraffin.

[0034] Furthermore, during processing, the interior of the ultra-thin head cover part 1 is filled with paraffin wax 2, and the paraffin wax 2 is melted and removed after the outer circle processing is completed. After the inner hole is finely processed, the tooling is installed and industrial paraffin is poured into the tooling cavity. After the paraffin cools, the inner wall of the workpiece is completely filled to ensure sufficient rigidity when the outer circle is finely processed.

[0035] Furthermore, during processing, a washer 4 is provided between the bolt 5 and the tool body 7. The washer 4 is provided to ensure the reliability of the fixed installation of the tool body 7.

[0036] Example 3:

[0037] A turning method for ultra-thin head cover parts is implemented using the turning tool, comprising the following steps:

[0038] Step 1, initial processing of ultra-thin hood parts 1:

[0039] Rough turning the outer circle and closed end face of the ultra-thin hood-like parts 1, wherein the outer circle is increased by 5mm on one side and the closed end face is increased by 1mm. Then, the ultra-thin hood-like parts 1 are adjusted, and the open end face, inner hole and large end opening outer circle 3 are turned;

[0040] Step 2, processing of radial threaded hole 6:

[0041] Place the ultra-thin head cover part 1 on a horizontal boring machine, drill multiple radial threaded holes 6 on the outer circle 3 of the large end opening, and mark the outer circle with a margin.

[0042] Step 3, filling with paraffin:

[0043] With the opening of the ultra-thin hood part 1 facing upwards, pour melted paraffin wax into the ultra-thin hood part 1, and use the lifting ring to align the tool body 7 with the ultra-thin hood part 1. Check whether the hole positions are aligned and use a feeler gauge to check whether the tool body 7 and the plane of the ultra-thin hood part 1 are tightly attached. Fasten the ultra-thin hood part 1 with the bolt 5 and the washer 4, and continue to add paraffin wax to ensure that the cavity is filled with paraffin wax 2;

[0044] Step 4, finishing of ultra-thin hood parts 1:

[0045] On the CNC lathe, align the outer circle and end face reference of the tool body 7, polish the end face product, drill and ream the end face center hole 16, chamfer the hole of the end face center hole 16, and gently support it with a center, rough and fine turn the outer circle product, pay attention to processing cooling to prevent the temperature from being too high to melt the paraffin 2;

[0046] Step 5, removal of ultra-thin head cover parts 1:

[0047] Remove the bolt 5, heat the ultra-thin head cover part 1 to melt the solid paraffin 2, take it out, collect the paraffin, store it and reuse it.

Claims

1. A turning tool for ultra-thin head cover parts, characterized in that: It comprises a tool body (7) for fixing and connecting the open end of the ultra-thin hood-like part (1); The tooling body (7) includes a first circular boss (10) for matching with the inner wall of the opening of the ultra-thin hood-like part (1), a plurality of radial threaded holes (6) are evenly processed in the radial direction of the first circular boss (10), and the radial threaded holes (6) are matched with the through holes (15) on the ultra-thin hood-like part (1) through bolts (5), a second circular boss (12) is provided at the large end of the first circular boss (10), and a third circular boss (14) is provided at the large end of the second circular boss (12); A first positioning end surface (11) is formed between the first circular boss (10) and the second circular boss (12), and a second positioning end surface (13) is formed between the second circular boss (12) and the third circular boss (14).

2. The ultra-thin head cover part turning tool according to claim 1, characterized in that: An assembly chamfer (9) is provided at the end of the first circular boss (10).

3. The ultra-thin head cover part turning tool according to claim 1, characterized in that: The through hole (15) is provided on the outer circle (3) of the large end opening of the ultra-thin head cover-like component (1).

4. The ultra-thin head cover part turning tool according to claim 1, characterized in that: The end surface of the tool body (7) is machined with a plurality of material-reducing through holes (8) that are evenly arranged around the axis.

5. The ultra-thin head cover part turning tool according to claim 1, characterized in that: During processing, a washer (4) is provided between the bolt (5) and the tool body (7).

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