CN110370048A - A kind of fixture for boring machine of ears part processing inner hole - Google Patents

Abstract

The invention discloses a boring machine fixture for machining inner holes of double ear parts, which comprises a bottom plate, a pressing plate, a Φ31 pin, a Φ31.6 pin, a bushing, bolts and nuts, bolts, stud nuts and studs. The boring machine jig for machining the inner hole of the double-ear parts provided by the invention solves the problem of one-time processing of a large number of parts, improves the processing efficiency of the parts, and improves the product quality. The positioning and clamping methods of all parts are consistent, ensuring that all Consistency of parts.

Description

A boring machine jig for machining inner holes of two-ear parts

technical field

The invention belongs to the technical field of mechanical processing, and in particular relates to a boring machine fixture for processing inner holes of double ear parts.

Background technique

The connecting lug part is a structure that often appears in the aviation field. It has precise dimensions, high toughness of the material, is not easy to cut, and is difficult to process. It is widely used in the aerospace field. The machine tool selected for this material has good rigidity, high power (recommended power greater than 10 kilowatts), and a good cooling device. It is required that the tool has high hardness, strength and toughness, and has good wear resistance, oxidation resistance and resistance. Cohesiveness.

In the process of processing this part, it is necessary to process two holes on the part, and process Φ31H11 into Φ31.6JS6. In the past, the processing process was in the form of an assembled fixture, with positioning pins for positioning, and then pressing with a pressure plate for processing. If the parts are developed, this processing method can be carried out, but when the parts are mass-produced, the following disadvantages will be exposed: 1) The assembly is heavy and the installation is not easy; it is not suitable for the processing of a large number of parts; 2) The assembly fixture is unstable, the preparation time is long, and the delay Production cycle; 3) large part error, unstable size of each part, affecting product uniformity; 4) large uncertainty in each assembly, stable assembly quality, affecting product accuracy. The above problems directly lead to the delay of the production cycle of parts and the decline of product quality in batch production.

Contents of the invention

The object of the present invention is to provide a boring machine fixture for machining inner holes of double lug parts, so as to solve the above-mentioned problems in the prior art.

Technical scheme of the present invention is:

A boring machine fixture for machining inner holes of two-ear parts, which includes a bottom plate 1, a pressure plate 2, a Φ31 pin 3, a Φ31.6 pin 4, a bushing 5, a bolt nut 6, a bolt 7, a stud nut 8 and a stud 9; Wherein, the bottom plate 1 is a cuboid structure, and two step holes and two pressure plate connection holes are opened in the center of the bottom plate 1, the two step holes are arranged along the width direction of the bottom plate 1, and the two pressure plate connection holes are arranged along the length direction of the bottom plate 1 , the line connecting the circle centers of the connecting holes of the two pressure plates and the line connecting the circle centers of the two step holes pass through the center of the bottom plate 1; There is a layer of bushing 5 .

The Φ31 pin 3 and the Φ31.6 pin 4 are cylindrical structures with a small outer diameter at the head end and a large outer diameter in the middle. The small hole of the step hole behind sleeve 5 is interference fit, so that Φ31 pin 3 or Φ31.6 pin 4 can be stably inserted into the step hole, and the inner diameter of the large hole of the step hole is larger than the middle outer diameter of Φ31 pin 3 and Φ31.6 pin 4 , when the head end of Φ31 pin 3 or Φ31.6 pin 4 is inserted into the small hole, a part of the middle part of Φ31 pin 3 or Φ31.6 pin 4 is accommodated in the large hole, and the Φ31 pin 3 and Φ31.6 pin 4 The middle part is used for positioning, two holes of fixing part 10.

One end of the pressure plate 2 is provided with an oval hole, and the bolt 7 passes through the oval hole and the connection hole of the pressure plate on the bottom plate 1, and the bolt nut 6 is connected with the bolt 7 at the oval hole on the upper surface of the pressure plate 2 to apply pressure. The lower surface of the other end of the pressing plate 2 is connected to one end of the stud 9, and the other end of the stud 9 is connected to the stud nut 8, and the stud 9 cooperates with the stud nut 8 to play a supporting role. When in use, the pressing plate 2 is provided with one end of the oval hole It is pressed on the part 10 to be processed, and the other end is supported by the stud 9 and the stud nut 8, and the pressure is applied by rotating the bolt and nut 6.

Effect and benefit of the present invention are:

The boring machine jig for machining inner holes of double-ear parts provided by the present invention is used for processing two holes on one part, and has the following advantages: 1) the parts are light and easy to install; 2) the positioning and clamping methods of all parts are consistent , to ensure the consistency of all parts; 3) special tooling ensures the uniformity of all products and improves product quality; 4) the fixture is tightened and fixed by nuts, and one-time clamping can realize one-time processing and molding of the inner hole; 5) the use of special fixtures avoids Instability caused by assembly.

Description of drawings

Figure 1A is a schematic diagram of the machined part.

Fig. 1B is a cross-sectional view along A-A direction in Fig. 1A.

Fig. 2A is a schematic structural view of a boring machine fixture for machining an inner hole of a double lug part provided in an embodiment of the present invention.

Fig. 2B is a cross-sectional view along A-A direction in Fig. 2A.

Fig. 3 is a three-dimensional structural schematic diagram of a boring machine jig for machining inner holes of a double lug part provided in an embodiment of the present invention.

Fig. 4A is a schematic diagram of the machining of the boring machine jig for machining the inner hole of the double lug part provided in the embodiment of the present invention.

Fig. 4B is a cross-sectional view along A-A direction in Fig. 4A.

In the figure: 1 bottom plate; 2 pressure plate; 3 Φ31 pin; 4 Φ31.6 pin; 5 bushing; 6 bolt nut; 7 bolt; 8 stud nut; 9 stud; 10 parts.

Detailed ways

The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

It should be understood that the appended drawings are not to scale, presenting a suitably simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, locations and shapes will be determined in part by the particular intended application and use environment.

In the accompanying figures, the same or equivalent parts (elements) are designated with the same reference numerals.

Fig. 2A is a schematic structural view of a boring machine fixture for machining an inner hole of a double lug part provided in an embodiment of the present invention. Fig. 2B is a cross-sectional view along A-A direction in Fig. 2A. Fig. 3 is a three-dimensional structural schematic diagram of a boring machine jig for machining inner holes of a double lug part provided in an embodiment of the present invention. Referring to Fig. 2A to Fig. 3, in this embodiment, the boring machine fixture for machining the inner hole of the double-ear parts includes a bottom plate 1, a pressure plate 2, a Φ31 pin 3, a Φ31.6 pin 4, a bushing 5, bolts and nuts 6, bolts 7, Stud nut 8 and stud 9. The bottom plate 1 is a cuboid structure, and two step holes and two pressure plate connection holes are opened in the center of the bottom plate 1. The two step holes are arranged along the width direction of the bottom plate 1, and the two pressure plate connection holes are arranged along the length direction of the bottom plate 1. The line connecting the circle centers of the connecting holes of the first pressure plate and the line connecting the circle centers of the two stepped holes all pass through the center of the base plate 1 . The inner diameter of the small hole at the lower end of each step hole is smaller than the inner diameter of the large hole at the upper end, and a layer of bushing 5 is arranged on the inner wall of the small hole of each stepped hole.

Both Φ31 pin 3 and Φ31.6 pin 4 are cylindrical structures with a small outer diameter at the head end and a large middle outer diameter. The small hole of the stepped hole is interference fit, so that the Φ31 pin 3 or Φ31.6 pin 4 can be stably inserted into the stepped hole, and the bushing 5 can be replaced. When the inner diameter of the hole becomes larger and the Φ31 pin 3 or Φ31.6 pin 4 cannot be stably fixed, a new bushing 5 can be replaced to stabilize the fixation. The inner diameter of the large hole of the step hole is larger than the middle outer diameter of Φ31 pin 3 and Φ31.6 pin 4. When the head end of Φ31 pin 3 or Φ31.6 pin 4 is inserted into the small hole, Φ31 pin 3 or Φ31.6 pin 4 A part of the middle part is accommodated in the large hole. Specifically, the outer diameter of the middle part of the Φ31 plug 3 is 31 mm, and the outer diameter of the middle part of the Φ31.6 plug 4 is 31.6 mm.

One end of the pressure plate 2 is provided with an oval hole, and the bolt 7 passes through the oval hole and the pressure plate connection hole on the bottom plate 1, and the bolt nut 6 is connected with the bolt 7 at the oval hole on the upper surface of the pressure plate 2 to apply pressure. The other end lower surface connects one end of stud 9, and the other end of stud 9 connects stud nut 8, and stud 9 cooperates with stud nut 8 to play a supporting role. During use, pressing plate 2 offers an end of an oval hole to be pressed on On the processed part 10, the other end is supported by a stud 9 and a stud nut 8, and pressure is applied by rotating the bolt and nut 6.

The method of using the boring machine fixture for machining the inner hole of the double-ear part:

1) As shown in Fig. 2A to Fig. 4B, put the bottom plate 1 flat on the lathe working platform, and press it slightly with the three-jaw chuck pressure plate on the machine tool. At this time, adjust the position of the center of the hole of the bushing 5 to ensure that The center of the hole of the bushing 5 coincides with the center of the machine tool spindle.

2) Put the part 10 on the bottom plate 1, and ensure that the center of a hole of the part 10 is consistent with the center of the hole of the bushing 5. At this time, insert the Φ31 pin 3 through the hole of the part 10 into the bushing 5, that is, the part This hole of 10 is fixed with the position of base plate 1.

3) At this time, align the other hole of the part 10 with the center of the hole of the other bushing 5, and another Φ31 pin 3 passes through the other hole of the part 10 and inserts it into the bushing 5, so that the hole of the part 10 Fixed with base plate 1.

4) Install the pressure plate 2, press it on the part 10, and tighten the bolt 7 through the nut 6; install the pressure plate 2 on the other side in the same way; press the pressure plate 2 completely.

5) Pull out two Φ31 bolts 3, and process a hole of the part 10.

6) After machining a hole, loosen the pressure plate 2, and reverse the positions of the two holes of the part 10 to ensure that the center of the hole that is not machined is consistent with the center of the machine tool spindle.

7) Repeat step 2).

8) At this time, the other processed hole of the part 10 is aligned with the center of the hole of the other bushing 5, and the Φ31.6 pin 4 is inserted into the bushing 5 through the other hole of the part 10, so that the hole is aligned with the bottom plate 1 position is fixed.

9) Repeat step 4).

10) Pull out the Φ31 pin 3 and Φ31.6 pin 4, and process another hole of the part 10.

11) Complete the disassembly of all parts 10.

It can be seen that the boring machine jig for machining the inner hole of the double lug parts provided by the present invention solves the problem of processing a large number of parts at one time, improves the processing efficiency of the parts, improves the product quality, and achieves certain economic benefits. At the same time, both the technical level and the ability to solve practical problems have been improved. At the same time, it provides a manufacturing basis for similar parts.

The descriptions presented above of the exemplary embodiments are for illustration only and are not intended to be exhaustive or to limit the invention to the precise forms described. Obviously, many modifications and variations are possible to those skilled in the art based on the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application, thereby enabling others skilled in the art to understand, implement and utilize the various exemplary embodiments of the invention and various alternatives thereof and modified form. It is intended that the scope of the invention be defined by the appended claims and their equivalents.

Claims (1)

1. A boring machine fixture for processing inner holes of double-eared parts, characterized in that, the boring machine fixture for processing inner holes of double-eared parts includes a base plate (1), a pressure plate (2), a Φ31 pin (3), a Φ31.6 Pin (4), bushing (5), bolt nut (6), bolt (7), stud nut (8) and stud (9); wherein, The bottom plate (1) is a cuboid structure, and two step holes and two pressure plate connection holes are provided in the center of the bottom plate (1), the two step holes are arranged along the width direction of the bottom plate (1), and the two pressure plate connection holes Arranged along the length direction of the bottom plate (1), the line connecting the circle centers of the two pressure plate connecting holes and the circle centers of the two stepped holes all pass through the center of the bottom plate (1); the inner diameter of the small hole at the lower end of each stepped hole is smaller than the large hole at the upper end Inner diameter, the inner wall of the small hole of each step hole is provided with a layer of bushing (5); The Φ31 pin (3) and the Φ31.6 pin (4) are cylindrical structures with a small outer diameter at the head end and a large outer diameter in the middle, and the outer diameter of the head end of the Φ31 pin (3) and the Φ31.6 pin (4) The same diameter, and interference fit with the small hole of the stepped hole after the bushing (5) is set on the inner wall, so that the Φ31 pin (3) or Φ31.6 pin (4) can be stably inserted into the stepped hole, and the inner diameter of the large hole of the stepped hole Greater than the outer diameter of the middle part of the Φ31 pin (3) and Φ31.6 pin (4), when the head end of the Φ31 pin (3) or Φ31.6 pin (4) is inserted into the small hole, the Φ31 pin (3) or Φ31 .6 A part of the middle part of the pin (4) is accommodated in the large hole, and the middle parts of the Φ31 pin (3) and the Φ31.6 pin (4) are used for positioning and fixing the two holes of the part (10); One end of the pressure plate (2) is provided with an oval hole, and the bolt (7) passes through the oval hole and the pressure plate connecting hole on the bottom plate (1), and the bolt nut (6) is used at the oval hole on the upper surface of the pressure plate (2). Connect with bolt (7), in order to apply pressure, the other end lower surface of pressure plate (2) connects one end of stud (9), the other end of stud (9) connects stud nut (8), stud (9 ) cooperates with the stud nut (8) to play a supporting role. When in use, the end of the oval hole provided by the pressure plate (2) is pressed on the part (10) to be processed, and the other end is formed by the stud (9) and the stud nut ( 8) Support, apply pressure by turning the bolt nut (6).