Special tool for rotary parts and on-line machining method

Abstract

The invention relates to a tool special for rotary parts and an on-line machining method. The problem that at present, the efficiency is low during batch production of the rotary parts is solved. The tool is provided with a center hole, a positioning hole, a positioning switching block and an equal-height block, and a positioning pin is installed on the positioning switching block. The tool center is adjusted to the rotation center of a machining platform offline, the small end of the part is placed in a tool center hole, zero points XYZ are arranged at the tool center, a reference B0 is aligned on a machine tool, and the large end face feature and a positioning hole are machined; turning-over machining is conducted, a switching positioning block is installed at the positions of two positioning holes of a tool, clamping and positioning are conducted through a tool positioning pin offline, an equal-height block is used for heightening a part, the circle center of the small end of the part is arranged at the zero point XYZ, two positioning holes of the large end are metered and straightened to be set as the rotating direction reference B0, and the small end feature and the window feature are machined through a machine tool. The alignment time of the machine tool is shortened through offline clamping and positioning, the utilization rate of the machine tool is increased, and large-batch efficient machining is achieved.

Description

Technical Field

[0001] The invention relates to a special tooling for a rotary part with a pin hole and an on-line processing method, which is suitable for clamping and positioning a rotary part with a pin hole of 300-750 on the end face of the part. Background Art

[0002] Batch processing of typical parts is an indispensable part of the parts processing process. Generally, there is only one part for a machine tool. Each time a part is processed, it needs to be re-clamped and aligned. Each clamping and alignment will inevitably cause the machine tool to stagnate, and the clamping process will also waste a lot of time, which will take up a lot of manpower and equipment time. At the same time, the general processing process is to directly process the features in an unordered manner. At the same time, these features are also affected by clamping. The processing process will be affected by the clamping adjustment error. The accumulation of errors will inevitably affect the accuracy of the parts. Finally, after processing one feature, changing the clamping method to process another feature will inevitably affect the overall accuracy of the parts. In addition, the production method of using only one machine tool for processing at a time is not flexible enough and the resource utilization is not sufficient. Therefore, multiple clamping of a single machine will inevitably cause waste of production resources and reduce processing accuracy. In order to solve the problem of positioning and alignment of batch parts and efficient processing, and improve production efficiency, it is necessary to design a special tooling and apply it on the production line to ensure production efficiency. Summary of the invention

[0003] The present invention solves the problem of low efficiency of positioning and alignment of rotary parts during batch production by providing a special tooling and an on-line processing method for rotary parts.

[0004] The present invention is achieved by the following technical solutions:

[0005] A special tooling for rotary parts is used for processing rotary parts with one end large and the other end small. The rotary parts need to process two end face features and window features on the profile. A centrally symmetrical positioning hole is arranged on the large end. The tooling comprises a tooling body. The body is provided with a central hole for positioning the small end of the part. The hole diameter is equal to the diameter of the small end of the part. A plurality of groups of positioning holes with different hole spacings are arranged on the end face of the body. The hole spacing of the positioning holes is equal to the hole spacing of the positioning holes on the large end face of the part. The positioning adapter block is a cylinder. The lower end is installed in the positioning hole on the end face of the body. The upper end is installed with a positioning pin with the same diameter as the positioning hole on the large end face of the part. An equal height block is also arranged on the body.

[0006] The lower end of the positioning adapter block is installed in the positioning hole on the end surface of the body through a pin.

[0007] Equal height blocks are arranged on the end surface of the tooling body.

[0008] The equal height blocks avoid the dead stroke of the machine tool, and the height is determined according to the dead stroke of different machine tools.

[0009] A method for processing rotary parts using a special tooling on-line, comprising the following steps:

[0010] 1) Preparation before going online: adjust the center of the tooling circle offline to the rotation center of the processing platform, use bolts to fix the tooling and the processing platform, place the small end of the part in the center hole of the tooling, fix it through the pressure plate, set the zero point XYZ at the center of the tooling circle, find the rotation direction reference B0 on ​​the machine tool according to the part features, and process the large end face features and positioning holes on the machine tool;

[0011] 2) Flip processing, install the two locating pins behind the transfer locating block, install the transfer locating block at the two locating holes of the tooling, clamp and position it offline through the tooling locating pins, use the equal height blocks to raise the parts, set the center of the small end of the parts at the zero point XYZ, punch and straighten the two locating holes at the large end and set them as the rotation direction reference B0, and machine the small end features and window features.

[0012] The present invention utilizes offline clamping and positioning to reduce the machine tool alignment time, improve the machine tool utilization rate, and realize high-efficiency processing in large quantities, thereby improving production efficiency and reducing the waste of production resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the front of the parts;

[0014] Figure 2 It is a schematic diagram of the reverse side of the part;

[0015] Figure 3 It is a schematic diagram of the positioning of the large end face of the part;

[0016] Figure 4 It is a schematic diagram of the tooling;

[0017] Figure 5 It is a schematic diagram of the tooling body;

[0018] Figure 6 It is a schematic diagram of the positioning transfer block;

[0019] Figure 7 is a schematic diagram of the positioning pin;

[0020] Figure 8 It is a schematic diagram of equal height blocks. DETAILED DESCRIPTION

[0021] The present invention is a special tooling for rotary parts and an on-line processing method, which will be further described below in conjunction with the accompanying drawings.

[0022] Typical parts: connection compartment, such as Figure 1 , Figure 2 , Figure 3As shown: the big end and the small end are rotary structures, the big end face has two positioning pin holes (a±0.02, ФBHb) (300≤a≤750), the middle is a hollow structure, and there are four window features on the profile. Both ends and the window features need to be processed. In order to improve the utilization rate of the machine tool and improve production efficiency, a special positioning tool is designed. The small end outer circle with high precision is used for positioning, the big end features are processed, and then the small end features and window features are turned over to process. Special tooling needs to be designed to achieve two-time positioning with one tooling. For details of the tooling, see Figure 4 , 5 As shown, this tooling consists of a tooling body, an equal height block, a positioning adapter block, and a positioning pin.

[0023] The inner circle of the tooling is Ф318 (+0.05, 0) (Ф318 is a special value, determined according to the diameter of the small end of the part). The center of the inner circle of the tooling is kept consistent with the rotation center of the processing platform in advance. When processing the large end first, use the high-precision outer circle (Ф318) of the small end of the part for positioning. When processing the small end features and window features, use the two locating pin holes at the large end and the locating pins on the tooling for positioning.

[0024] like Figure 6 As shown, the function of the positioning adapter block is to locate the pin hole of the part. The coaxiality of the pin hole for installing the positioning pin and the positioning pin is required to be 0.01. The 2×Ф8H7 hole spacing on the tooling is a fixed value. By changing the pin hole of the positioning adapter block, the processing of rotating parts with the same hole spacing but different positioning pin holes can be achieved.

[0025] For rotating parts with positioning pin holes of different hole spacing, it is only necessary to rotate the tooling surface along the rotation direction reference B0 by an angle value ɑ and re-process the two pin holes to achieve positioning.

[0026] like Figure 7 As shown, the diameter of the locating pin can be processed according to the size of the pin hole of the part.

[0027] like Figure 8 As shown, the function of the contour block is to ensure the same height with an accuracy of ±0.01 to avoid the dead range of the machine tool. The height of the contour block is determined according to the dead range of different machine tools.

[0028] Before going online, adjust the center of the tooling circle offline to the rotation center of the processing platform, and use bolts to firmly fix the tooling and the processing platform. Place the small end of the part on the inner circle of the tooling and fix it with a pressure plate. The zero point XYZ is set at the center of the Ф318 sunken circle of the tooling. On the machine tool, you only need to align B0 according to the part features, and adjust according to the master control, and the machine tool will process the large end face features and positioning holes.

[0029] Flip the surface, install the two locating pins behind the transfer locating block, install the transfer locating block at the two pin holes of the tooling, and re-measure the hole distance to meet the design requirements. Clamp and position the tooling locating pins offline, use the equal height block to raise the part, set the center of the small end of the part at the zero point XYZ, and straighten the two locating holes at the large end to B0. According to the master control deployment, the machine tool processes the small end features and window features.

[0030] After the workpiece is processed, the workbench is exchanged with the workbench that has been pre-clamped offline, and the part to be processed is placed in the machine tool. After checking the zero point, the processing can continue. In this way, the part can be processed continuously, reducing the processing preparation cycle.

[0031] The method of the present invention has high efficiency, accurate positioning, high precision, short processing cycle, is not restricted by the site, does not need to be re-clamped and aligned on the machine tool, and greatly improves the production efficiency. It is especially suitable for batch production and rotary parts with locating pin hole cabins; the tooling can also be used for the clamping and positioning of rotary parts with 300-750 pin holes on the end faces of parts, greatly reducing the tooling processing cycle; the method can also effectively reduce the problem of changing equipment during the processing, reduce the replacement of parts, and combine with the theoretical guidance of the typical feature processing process to avoid adjustment errors caused by feature processing and disassembly, which affects the quality and precision of parts.

Claims

1. A special tooling for rotating parts, used for processing rotating parts with one end large and the other end small. Rotating parts need to process two end surface features and window features on the profile. The large end is provided with a centrally symmetrical positioning hole. The tooling is characterized by: It includes a tooling body, which has a center hole for positioning the small end of the part, and the hole diameter is equal to the diameter of the small end of the part. A plurality of groups of positioning holes with different hole spacings are arranged on the end face of the body, and the hole spacing of the positioning holes is equal to the hole spacing of the positioning holes on the large end face of the part. The positioning adapter block is a cylinder, the lower end of which is installed in the positioning hole on the end face of the body, and the upper end is installed with a positioning pin with the same hole diameter as the positioning hole on the large end face of the part.

2. The special tooling for rotating parts according to claim 1 is characterized in that: The lower end of the positioning adapter block is installed in the positioning hole on the end surface of the body through a pin.

3. The special tooling for rotating parts according to claim 1 is characterized by: The end surface of the tooling body is provided with equal height blocks.

4. The special tooling for rotating parts according to claim 3 is characterized by: The equal height blocks avoid the dead range of the machine tools, and the height is determined according to the dead range of different machine tools.

5. A method for processing rotary parts on-line using special tooling, characterized in that: The following steps are involved: 1) Preparation before going online: adjust the center of the tooling circle offline to the rotation center of the processing platform, use bolts to fix the tooling and the processing platform, place the small end of the part in the center hole of the tooling, fix it through the pressure plate, set the zero point XYZ at the center of the tooling circle, find the rotation direction reference B0 on ​​the machine tool according to the part features, and process the large end face features and positioning holes on the machine tool; 2) Flip processing, install the two locating pins behind the transfer locating block, install the transfer locating block at the two locating holes of the tooling, clamp and position it offline through the tooling locating pins, use the equal height blocks to raise the parts, set the center of the small end of the parts at the zero point XYZ, punch and straighten the two locating holes at the large end and set them as the rotation direction reference B0, and machine the small end features and window features.

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