Box shifting fork hole machining method

Abstract

The invention provides a box shifting fork hole machining method, and belongs to the technical field of machining. The method comprises the steps that firstly, all boring sleeves are pressed into a boring die frame in an H7 / m6 transition clearance fit mode, after the end faces make contact with the boring die frame, fixing screws are screwed, and installation of the device is completed; on the basis, a workpiece is positioned and installed on the device and pressed tightly, and the gap H is controlled to be within 3.5 mm; secondly, a numerical control machining program is programmed, when the drill tip of the gun drill enters the boring sleeve, the main shaft starts to rotate, the gap between the gun drill and the boring sleeve is controlled to range from 0.003 mm to 0.006 mm, and machining is further started; and after machining, the main shaft stops, advances to the front of the next device and then starts to rotate, and machining is completed. The boring sleeve serves as a guide hole for the gun drill, the advantage of deep hole machining of the gun drill is fully utilized, and machining is completed through one-time clamping. The time for secondary repeated machining and positioning is saved, the machining precision is high, the efficiency is high, and the machining cost is low. The device is suitable for processing shifting fork holes in various fields.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for processing a box fork hole. Background Art

[0002] The shift fork hole is a commonly used connection method in mechanical transmission, which is used to realize power transmission between two shafts. The existing shift fork hole processing methods mainly use mechanical processing, such as drilling, reaming, boring, etc., but these methods have problems such as low processing efficiency, difficult to ensure processing accuracy, and high processing costs. In the field of mechanical processing, the processing quality of the shift fork hole directly affects the operating performance and life of mechanical equipment. Therefore, it is of great significance to improve the processing quality and efficiency of the shift fork hole. Summary of the invention

[0003] The present invention aims to provide a method for processing a box fork hole in view of the technical defects of the prior art, so as to solve the technical problems of low processing efficiency, difficulty in ensuring processing accuracy and high processing cost of conventional processing methods.

[0004] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: A method for processing a box fork hole comprises the following steps: 1) Press each boring sleeve into the boring die frame with H7 / m6 transition clearance. After the end face contacts the boring die frame, tighten the fixing screws to complete the installation of the device. 2) Position the workpiece on the device and press it tightly, controlling the gap H to be within 3.5 mm; 3) Prepare a CNC machining program. When the drill tip of the gun drill enters the boring sleeve, the spindle starts to rotate, and the gap between the gun drill and the boring sleeve is controlled between 0.003 and 0.006 mm, and further machining begins. After machining, the spindle stops, moves forward to the next device, and then starts to rotate again to complete the machining.

[0005] Preferably, the boring sleeve is made of bearing steel and is quenched.

[0006] Preferably, the coaxiality of the boring die frame hole meets the design requirements.

[0007] Preferably, in the method, a boring sleeve is used as a guide hole for the gun drill.

[0008] The present invention provides a method for processing a fork hole of a housing. The technical solution uses a boring sleeve as a guide hole for a gun drill, fully utilizing the advantage of the gun drill in processing deep holes, and completes the processing with one clamping. The time for repeated processing and positioning is saved, and the processing accuracy, efficiency and cost are high. It is suitable for the processing of fork holes in various fields. As an efficient and high-precision fork hole processing method, the present invention realizes rapid and accurate processing of fork holes by adopting advanced CNC programming technology and gun drilling technology, thereby improving production efficiency and processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a side view of the processing object of the present invention; Figure 2 yes Figure 1 A cross-sectional view at AA in the middle (with reference numerals); Figure 3 yes Figure 1 A cross-sectional view at AA (without reference numerals); Figure 4 yes Figure 3 A partial enlarged view of point B in the middle; Figure 5 is a top view of the processing object of the present invention; Figure 6 is a three-dimensional diagram of a processing object of the present invention; In the figure: 1. Clamping concrete 2. Boring die set 3. Workpiece 4. Boring sleeve 5. Gun Drill 6. Fork hole 7. Workpiece clamping mechanism 8. Fixing screws 9. Gap H. DETAILED DESCRIPTION

[0010] The specific embodiments of the present invention will be described in detail below. In order to avoid too much unnecessary details, the well-known structures or functions will not be described in detail in the following examples. The approximate language used in the following examples can be used for quantitative expression, indicating that the quantity can be allowed to have a certain change without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following examples have the same meaning as those generally understood by those skilled in the art to which the present invention belongs.

[0011] A method for processing a fork hole of a housing, the typical structure of the processing object is as follows Figure 1 to Figure 6 As shown, the structure involved mainly includes a shift fork hole 6, a workpiece 3, a boring die frame 2, a boring sleeve 4, a fixing screw 8, a gun drill 5, etc.

[0012] Here are the steps: First, installation of the device: First, press the boring sleeve 4 into the boring die frame 2 in a H7 / m6 transition clearance fit, and after the end face contacts the boring die frame 2, tighten the fixing screw 8, and install other boring sleeves 4 in the same way. The installation of the entire device is completed.

[0013] Second, positioning and installation of the workpiece: Then the workpiece 3 is positioned and installed on the device and pressed tightly. The clearance H9 is controlled within 3.5 mm.

[0014] Third, the workpiece processing: compile the CNC processing program, when the drill tip of the gun drill 5 enters the boring sleeve 4, the spindle starts to rotate. (The clearance between the gun drill 5 and the boring sleeve 4 is controlled between 0.003 and 0.006 mm), and then start processing. After processing, the spindle stops, moves forward to the next device, and then starts to rotate to complete the processing.

[0015] Among them: 1. The boring sleeve 4 is made of bearing steel and quenched to improve performance.

[0016] 2. Ensure that the coaxiality of the two holes of the boring die frame meets the design requirements.

[0017] like Figure 2 As shown. First, the workpiece 3 is processed, positioned and pressed on the clamp body 1. After the first wall of the workpiece is processed, the program controls the gun drill 5 to enter the left boring sleeve 4, and the spindle starts to rotate and feed until the left fork hole 6 is processed. The gun drill 5 stops rotating and moves forward until it enters the right boring sleeve 4 and starts rotating until the right fork hole 6 is processed. Other fork holes 6 are processed in the same way.

[0018] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the scope of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for processing a box fork hole, characterized in that: The following steps are involved: 1) Press each boring sleeve (4) into the boring die frame (2) in a H7 / m6 transition clearance fit. After the end face contacts the boring die frame (2), tighten the fixing screw (8) to complete the installation of the device. 2) Positioning and mounting the workpiece (3) on the device and pressing it tightly to control the gap H (9) to be within 3.5 mm; 3) A CNC machining program is prepared. When the drill tip of the gun drill (5) enters the boring sleeve (4), the spindle starts to rotate, the clearance between the gun drill (5) and the boring sleeve (4) is controlled to be between 0.003 and 0.006 mm, and further machining begins. After machining, the spindle stops, advances to the next device, and then starts to rotate again to complete the machining.

2. A method for processing a box fork hole according to claim 1, characterized in that: The material of the boring sleeve (4) is bearing steel and is quenched.

3. A method for processing a box fork hole according to claim 1, characterized in that: The coaxiality of the boring die holder (2) hole meets the design requirements.

4. A method for processing a box fork hole according to claim 1, characterized in that: In the method, a boring sleeve (4) is used as a guide hole for a gun drill (5).

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