CN113894515A

CN113894515A - SCM360D1 input shaft machining process

Info

Publication number: CN113894515A
Application number: CN202111368662.0A
Authority: CN
Inventors: 傅剑波; 王俊
Original assignee: Nanjing Chenwei Machinery Equipment Manufacturing Co ltd
Current assignee: Nanjing Chenwei Machinery Equipment Manufacturing Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-01-07

Abstract

The invention discloses a SCM360D1 input shaft processing technology, which comprises the following steps: (1) milling two planes and drilling a central hole; (2) finely turning the long end; (3) drilling a deep hole; (4) finely turning the big end and the total length, and drilling a central hole; (5) and (6) drilling and tapping threads. Compared with the prior art, the method can save a rough turning process and a numerical control device for a bottleneck process; the clamping position is improved, the process mode of clamping one top is changed, and the processing efficiency is improved.

Description

SCM360D1 input shaft machining process

Technical Field

The invention belongs to the technical field of input shaft machining processes, and particularly relates to an SCM360D1 input shaft machining process.

Background

The Shanghai Datong developed the next generation of V80 widebook, which will use the next generation of high performance diesel engine HPD2.0(D20) developed by Shanghai Datong, divided into a low power version and a high power version, to demand a front-drive 6-gear manual transmission with a maximum input torque of 375 Nm. The SCM360D1 input shaft is this transmission shaft class spare part, and its current hot preceding finish turning processing technology main processing bottleneck process is the rough turning stage, and the process is: milling and drilling two planes, finely turning a long end, roughly turning a large end, drilling a deep hole, finely turning the total length and tapping threads. The heavy process stage is to finish turning the long end and the big end, 120 pieces can be produced each time, and two numerically controlled lathes are occupied. If the quantity is increased suddenly and the processing beat of the original equipment is insufficient, the production line equipment is not distributed enough, the capacity is bottleneck, the delivery plan cannot be met, the current process cannot meet the requirement, or the equipment of a worker is newly added, and the investment cost is high.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the defects of the prior art, the invention provides a novel processing technology of an SCM360D1 input shaft, which can reduce the operation cost and improve the production efficiency.

The technical scheme is as follows: in order to achieve the purpose, the invention adopts the following technical scheme:

an SCM360D1 input shaft machining process comprises the following steps:

(1) milling two planes and drilling a central hole;

(2) finely turning the long end;

(3) drilling a deep hole;

(4) finely turning the big end and the total length;

(5) and drilling and tapping threads and drilling a central hole.

Drilling a center hole in the step (1), namely milling and drilling a center hole at one end to be in place; and (4) drilling a center hole in the step (4), namely, drilling a center hole and a threaded bottom hole at the other end (the end with the deep hole). Tapping can be carried out in the next process.

Preferably, in the step (1), two planes are milled, sharp-angle burrs are required to be removed, and the positioning and clamping end ensures that the straightness is less than or equal to 0.1. The special milling machine has the advantages that the total length process precision control of the finish milling rear shaft can reach +/-0.02 (within the range of 400 mm), and the process positioning precision can be effectively ensured.

Preferably, in the step (2), the long end is finely turned, and the long end is clamped with one jack, and the bounce is less than or equal to 0.15 mm. And the milling and punching machine is utilized to lath the reference outer diameter and the central hole, so that the process reference is ensured to be uniform, and the processing requirement on the long end of the blank is met.

Preferably, in the step (3), the deep hole is drilled, the diameter jump to the outer diameter is required to be less than or equal to 0.15, and burrs are removed through an air interface. The completion of the 2 processes utilizes the outer diameter after finish turning and the outer diameter reference of sleeve turning to meet the positioning requirement of the deep hole machine, and the deep hole process is preferentially considered in the process, so that one processing process can be reduced.

Preferably, in the step (4), the large end and the total length are finely turned, burrs are required to be removed, the straightness of the positioning and clamping end is less than or equal to 0.1, and the coaxiality of the inner hole and the outer diameter is less than or equal to 0.15. The upper deep hole is machined, the total length and the large end center hole can be machined, the large end and the total length are directly and precisely machined by utilizing the large outer diameter after the finish turning and the end face as a clamping reference, the requirements of the finish turning total length and the large end center hole of the shaft are indirectly guaranteed, the process of saving the finish turning total length can meet the requirements that the large end outer diameter and the large end center hole are machined at one time, and the precision meets the requirement of being less than 0.05mm in jumping.

Preferably, in the step (5), the thread is drilled and tapped, burrs are required to be removed, the straightness of the positioning and clamping end is guaranteed to be less than or equal to 0.1, and scrap iron after the internal thread is machined is cleaned.

The main relationship of the new process distribution is that the milling process and the finish turning of the long end are not changed, after the long end is finish turned, the outer circle is positioned, a deep hole can be directly drilled, after the deep hole is drilled, the large end is finish turned, the clamping position can be changed to a large outer diameter, and the large end and the total length are directly processed;

has the advantages that: compared with the prior art, the method can save a rough turning process and a numerical control device for a bottleneck process; the clamping position is improved, the process mode of clamping one top is changed, and the processing efficiency is improved.

Drawings

FIG. 1 is a schematic view of two planes of milling;

FIG. 2 is a schematic view of a finish-turned long end;

FIG. 3 is a schematic view of deep hole drilling;

FIG. 4 is a schematic view of a large end and a total length of a finish turning;

fig. 5 is a schematic view of the drill tap.

Detailed Description

The following is a general description of the embodiments of the present invention, which are the most preferred embodiments of the present invention, but the present invention is not limited to the following examples.

Examples

An SCM360D1 input shaft machining process is shown in figures 1-5 (the line thickened part is a machining part), and comprises the following steps:

(1) milling two planes, drilling a central hole, and positioning a clamping end to ensure that the straightness is less than or equal to 0.1;

(2) finely turning the long end, and requiring one clamp and one jack to jump less than or equal to 0.15 mm;

(3) drilling a deep hole, wherein the diameter jump to the outer diameter is required to be less than or equal to 0.15, and removing burrs from an air interface;

(4) finely turning the large end and the total length, drilling a central hole, and requiring to remove burrs, wherein the positioning and clamping end ensures that the straightness is less than or equal to 0.1, and the coaxiality of the inner hole and the outer diameter is less than or equal to 0.15;

(5) and drilling and tapping the thread, wherein burrs are required to be removed, the positioning and clamping end ensures that the straightness is less than or equal to 0.1, and scrap iron after the internal thread is machined is cleaned.

The novel process improves the prior rough turning distribution processing process after milling, directly drills holes after necessary positioning reference processing, adjusts the clamping position after deep hole drilling (the process saved by finish turning the big end is a process shared by the total length of finish turning and the finish turning big end, only clamps the finish turned big outer diameter as the reference, changes the prior one-clamping one-jacking process mode, saves the total length of the process finish turning and controls the total length of a processing shaft by depending on a central frame), and can process the big end size and the length size in place at one time.

The existing traditional process has overlong production line layout, once the demand is increased, new worker equipment is needed, the cost of a factory is increased, the existing process is limited at the long end of a rough turning, 240 production capacities per day cannot meet the delivery demand. The new process can save a procedure and equipment for processing the procedure, and the productivity is multiplied. The new process is in a production line unchanged state, the processes are reduced by one, the equipment is not increased, the operation cost is reduced, and the production efficiency is improved.

Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. An SCM360D1 input shaft machining process is characterized by comprising the following steps:

(1) milling two planes and drilling a central hole;

(2) finely turning the long end;

(3) drilling a deep hole;

(4) finely turning the big end and the total length, and drilling a central hole;

(5) and (6) drilling and tapping threads.

2. The SCM360D1 input shaft machining process of claim 1, wherein in step (1), the milling is performed on two planes, sharp corners and burrs are required to be removed, and the clamping end is positioned to ensure that the straightness is less than or equal to 0.1.

3. The SCM360D1 input shaft machining process of claim 1, wherein in step (2), the fine turning of the long end requires a clamp-on jump of less than or equal to 0.15 mm.

4. The SCM360D1 input shaft machining process of claim 1, wherein in step (3), the deep hole is drilled with a bore diameter to outer diameter run-out of 0.15 or less, and the hole is deburred.

5. The SCM360D1 input shaft machining process of claim 1, wherein in step (4), the large end and the total length are finish-turned to remove burrs, the positioning and clamping end ensures that the straightness is less than or equal to 0.1, and the coaxiality of the inner hole and the outer diameter is less than or equal to 0.15.

6. The SCM360D1 input shaft machining process according to claim 1, wherein in step (5), the drill taps the threads to remove burrs, the positioning and clamping end ensures that the straightness is less than or equal to 0.1, and scrap iron after internal thread machining is cleaned.