Tail center for end face machining of conical parts

Abstract

The utility model relates to a tail top for taper part end face machining belongs to the lathe machining technical field, the utility model designs the special tail top, combines the two processes of the existing fine turning small end and fine turning big end into one process, namely fine turning big and small ends, adopts numerical control lathe to process, makes the operating personnel labor intensity greatly reduces, production efficiency greatly improves, and the shift output improves one time, and the tail top is easy to operate, and the operation level and operation skill requirement of operating personnel reduces.

Description

Technical Field

[0001] This utility model belongs to the field of turning technology, specifically relating to a tail tip for machining the end face of a tapered part. Background Technology

[0002] One type of product includes a conical thin-walled rotating part ( Figure 1 These parts are made of copper, which has low hardness and is easily deformed under stress during machining. Both ends of these parts require precision machining: the smaller end is precision machined, followed by the larger end.

[0003] A conventional lathe is used for the finishing of the small and large ends during machining. The bottom thickness B and total height H are the required dimensions of the part; the shaded area represents the cutting allowance. Figure 2 When precision machining the small end, a tapered mandrel is used to position the outer conical surface against the inner conical surface of the part. A threaded cap is used to connect with the tapered mandrel to press the outer conical surface of the part for cutting. Figure 3 When precision machining the large end, the outer conical surface of the tapered mandrel is also used to fit and position the inner conical surface of the part, and a flat tailstock is used to press against the small end face of the part for cutting. Figure 4 This process has the following bottlenecks: 1. Using a conventional lathe for machining results in multiple clamping operations for parts, leading to low processing efficiency (100 pieces / shift), which is not conducive to mass production.

[0004] 2. The small contact area between the tail tip and the part makes it difficult to control the tail tip's force on the part. If the force is too large, the small end face of the part is prone to plastic deformation, affecting the product's dimensions and performance. If the force is too small, the part may rotate relative to the mandrel during machining due to the cutting force (the lathe spindle drives the mandrel to rotate while the part remains stationary). The large end face of the part cannot be cut, and the inner surface of the part is easily damaged. This requires a high level of skill from the operator. Utility Model Content

[0005] (a) Technical problems to be solved The technical problem to be solved by this utility model is: to design a special tail tip for machining the end face of a tapered part, so as to solve the problem of simultaneously precision machining the large end and the small end of the part in one clamping, thereby improving production efficiency and meeting the requirements of mass production.

[0006] To solve the above-mentioned technical problems, this utility model provides a tailstock for machining the end face of a tapered part, comprising: a tailstock body 1, a screw 2, a bearing cap 3, a clamping cone sleeve 4, a bearing 5, and a stripper sleeve 6; the tailstock is connected to the tailstock of a CNC lathe via the tailstock body 1; the bearing cap 3 is fastened by the screw 2 and clamps the bearing 5; the clamping cone sleeve 4 and the tailstock body 1 can rotate relative to each other; the bearing 5 and the stripper sleeve 6 are installed inside the tailstock body 1.

[0007] Preferably, the bearing 5 is installed into the tail top body 1 with an interference fit, and the outer ring of the bearing 5 is tightly fitted to the unloading sleeve 6.

[0008] Preferably, the bearing cap 3 and the clamping cone sleeve 4 cover the outer side of the bearing 5.

[0009] Preferably, the screw 2 is connected and tightened to the threaded hole on the tail top body 1 through the hole on the bearing cover 3, so that the bearing cover 3 presses the outer ring of the bearing 5.

[0010] Preferably, the clamping cone sleeve 4 is installed into the inner ring of the bearing 5 with an interference fit.

[0011] Preferably, the clamping cone sleeve 4 is capable of contacting and clamping the conical part.

[0012] Preferably, the tail top body 1 and the unloading sleeve 6 are machined with tool channels according to the size of the parts.

[0013] Preferably, the tail top body 1 is interference-fitted with the outer ring of the bearing 5.

[0014] Preferably, the part where the tailstock body 1 connects to the tailstock of the CNC lathe is machined into a Morse taper shank.

[0015] Preferably, the inner side of the clamping cone sleeve 4 is a cone surface, and it matches the shape of the cone-shaped part.

[0016] (III) Beneficial Effects This utility model has the following beneficial effects: 1. A special tailstock is designed, which combines the existing two processes of precision machining of the small end and precision machining of the large end into one process, namely precision machining of both ends, using a CNC lathe for processing. This greatly reduces the labor intensity of operators, greatly improves production efficiency, and doubles the output per shift (200 pieces / shift). 2. This tailstock is easy to operate, reducing the requirements for the operator's skill level and operating ability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a tapered product part; Figure 2 This is a schematic diagram showing the dimensions of the part that need to be machined. Figure 3 A schematic diagram of the precision machining of the small end of the part; Figure 4 A schematic diagram of the precision machining of the large end of the part; Figure 5 This is a schematic diagram of the tail section assembly; Figure 6 This is a schematic diagram of the machining process for product parts. Detailed Implementation

[0018] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0019] To meet the requirements of mass production, a special tail tip needs to be designed to solve the problem of merging part processing steps and meet the requirements of mass production. To solve this technical problem, this utility model proposes a special tail tip for machining the end face of conical parts, which can ensure that both ends of the part are machined in one clamping operation.

[0020] refer to Figure 5 The tailstock consists of a tailstock body 1, screws 2, bearing caps 3, clamping cone sleeves 4, bearings 5, and a stripper sleeve 6. The tailstock body 1 is the tailstock base and is connected to the tailstock of the CNC lathe; the screws 2 are used to fasten the bearing caps 3; the bearing caps 3 clamp the bearings 5 ​​and prevent foreign objects from falling into the bearings 5; the clamping cone sleeves 4 contact and clamp the tapered parts; the bearings 5 ​​allow the clamping cone sleeves 4 and the tailstock body 1 to rotate freely relative to each other; the stripper sleeve 6 is used to disassemble the original components when replacing the bearings 5 ​​and the clamping cone sleeves 4.

[0021] The unloading sleeve 6 is installed into the tail top body 1; the bearing 5 is installed into the tail top body 1 with an interference fit, the outer ring of the bearing 5 is close to the unloading sleeve 6, the bearing cover 3 covers the bearing 5, and the screw 2 is connected and tightened through the hole on the bearing cover 3 to the threaded hole on the tail top body 1, so that the bearing cover 3 presses the outer ring of the bearing 5; the clamping tapered sleeve 4 is installed into the inner ring of the bearing 5 with an interference fit, thus completing the tail top assembly.

[0022] The tailstock is connected to the tailstock of the CNC lathe via the tailstock body 1, thereby enabling the positioning and clamping of the conical parts being machined, and thus achieving mass production of the conical parts.

[0023] refer to Figure 5 , Figure 6 The design of the tail section of this utility model and its usage method are as follows (used in conjunction with a positioning fixture and a CNC lathe chuck): 1. Design and machine the tailstock body 1, bearing cap 3, clamping tapered sleeve 4, and unloading sleeve 6. The tailstock body 1 and unloading sleeve 6 are machined with tool channels according to the part dimensions. During machining, the tailstock body 1 is ensured to have an interference fit with the outer ring of the bearing 5. The connection point with the CNC lathe is machined into a Morse taper shank. The clamping method for the tapered part is changed from planar clamping to tapered surface clamping. During machining, the outer diameter of the clamping tapered sleeve 4 is ensured to have an interference fit with the inner ring of the bearing 5, and its inner shape is consistent with the part to ensure a tight clamping fit.

[0024] 2. After completing the tailstock assembly, install the Morse taper shank of the tailstock body 1 into the tailstock of the CNC lathe, ensuring that the tool path is parallel to the tool channel.

[0025] 3. Connect the positioning fixture 7 to the CNC lathe chuck 8 and align the positioning fixture 7.

[0026] 4. Manually push the tailstock 9 of the CNC lathe to clamp the tapered part and lock the tailstock 9. When the tailstock 9 is clamped, the Morse taper shank of the tailstock body 1 is locked to the tailstock 9 and will not rotate. At this time, the CNC lathe spindle drives the positioning fixture 7 to rotate. The tapered part is pressed by the clamping taper sleeve 4 in the tailstock 10, and is pressed against the positioning fixture 7 and rotates together. The tool moves in a straight line perpendicular to the CNC lathe spindle to realize the cutting of the tapered part. The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tail tip for machining the end face of a tapered part, characterized in that, include: Tail top body (1), screw (2), bearing cover (3), clamping cone sleeve (4), bearing (5) and unloading sleeve (6); the tail top is connected to the tailstock of the CNC lathe through the tail top body (1); the bearing cover (3) is fastened by screw (2) and clamps the bearing (5); the clamping cone sleeve (4) and the tail top body (1) can rotate relative to each other; the bearing (5) and the unloading sleeve (6) are installed inside the tail top body (1).

2. The tail tip for machining the end face of a tapered part as described in claim 1, characterized in that, The bearing (5) is installed into the tail top body (1) with an interference fit, and the outer ring of the bearing (5) is close to the unloading sleeve (6).

3. The tail tip for machining the end face of a tapered part as described in claim 1, characterized in that, The bearing cap (3) and the clamping cone sleeve (4) cover the outer side of the bearing (5).

4. The tail tip for machining the end face of a tapered part as described in claim 1, characterized in that, The screw (2) is connected and pressed through the hole on the bearing cap (3) to the threaded hole on the tail top body (1), so that the bearing cap (3) presses the outer ring of the bearing (5).

5. The tail tip for machining the end face of a tapered part as described in claim 1, characterized in that, The clamping cone sleeve (4) is installed into the inner ring of the bearing (5) with an interference fit.

6. The tail tip for machining the end face of a tapered part as described in claim 1, characterized in that, The clamping cone sleeve (4) can contact and clamp the conical part.

7. The tail tip for machining the end face of a tapered part as described in claim 1, characterized in that, The tail top body (1) and the unloading sleeve (6) are machined with tool channels according to the size of the parts.

8. The tail tip for machining the end face of a tapered part as described in claim 1, characterized in that, The tail top body (1) is interference-fitted with the outer ring of the bearing (5).

9. The tail tip for machining the end face of a tapered part as described in claim 1, characterized in that, The part where the tailstock body (1) connects to the tailstock of the CNC lathe is machined into a Morse taper shank.

10. The tail tip for machining the end face of a tapered part as described in claim 6, characterized in that, The inner side of the clamping cone sleeve (4) is a cone surface, and it matches the shape of the cone-shaped part.

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