Special fixture for milling four lug surfaces of flange joint

Abstract

The utility model relates to a special fixture for milling four lug surfaces of a flange joint, which comprises a bottom plate and a clamping mechanism, and is technically characterized in that a boss is arranged on the upper surface of the bottom plate, two positioning holes which are diagonally arranged are formed in the top surface of the bottom plate, and an angular pin and a positioning pin are respectively arranged in the two positioning holes; the protruding height of pin heads of the angular pins and the positioning pins is smaller than the target thickness of four lug faces of the flange connector, the clamping mechanism is composed of pressing connection assemblies symmetrically arranged on the left side and the right side of a boss, each pressing connection assembly comprises a horizontal pressing plate, a supporting stud and a locking bolt pair, and a long through hole is formed in each horizontal pressing plate. A stud of the locking bolt pair is sleeved with a lower buffer spring and an upper gasket, the lower end of the stud is connected with the bottom plate, the upper end of the stud penetrates through the long through hole and is connected with a locking nut, the lower end of a supporting stud is connected with the bottom plate, a guide groove is formed in the upper end of the supporting stud, and a guide protruding strip matched with the guide groove is arranged on the bottom face of the horizontal pressing plate. The fixture solves the problem of poor clamping stability when the four lug surfaces of the flange joint are milled, and improves the machining precision and the machining efficiency.

Description

Technical Field

[0001] This utility model relates to the field of flange joint processing fixtures, specifically to a special fixture for milling the four ear faces of a flange joint. Background Technology

[0002] Milling is one of the key processes in the machining of flange joints. Traditional machining methods often fail to guarantee the stability of flange joints during milling, which can easily lead to low machining accuracy and non-compliance with flatness standards. Moreover, the clamping process is cumbersome and inefficient, failing to meet the high precision and high efficiency requirements of modern industrial production. Utility Model Content

[0003] The purpose of this utility model is to provide a special fixture for milling the four ear faces of flange joints that has a reasonable structure and reliable use, so as to solve the problem of poor clamping stability when milling the four ear faces of flange joints, thereby improving the machining accuracy. At the same time, it is easy to operate and significantly improves the machining efficiency.

[0004] The technical solution of this utility model is:

[0005] A special fixture for milling the four ears of a flange joint includes a base plate and a clamping mechanism. The key technical features are: a boss for supporting the flange joint is provided in the center of the upper surface of the base plate; two diagonally arranged positioning holes are provided on the top surface of the boss, one positioning hole containing an angular pin and the other containing a positioning pin; the pin heads of the angular pin and the positioning pin protrude from the top surface of the boss, with the protrusion height less than the target thickness of the four ears of the flange joint; the clamping mechanism consists of crimping assemblies symmetrically arranged on the left and right sides of the boss. The device includes a horizontal pressure plate extending to the upper surface of the boss, a support stud supported between the other end of the horizontal pressure plate and the base plate, and a locking bolt assembly connecting the horizontal pressure plate and the base plate. The horizontal pressure plate has a corresponding elongated through hole for the locking bolt assembly. A lower buffer spring and an upper washer are fitted on the double-ended stud of the locking bolt assembly. The lower end of the double-ended stud is connected and fixed to the base plate, and the upper end passes through the elongated through hole and is connected to a locking nut. The lower end of the support stud is connected and fixed to the base plate, and the upper end has a guide groove. The bottom surface of the horizontal pressure plate has a guide protrusion that mates with the guide groove.

[0006] The aforementioned special fixture for milling the four ears of a flange joint has a base plate with a first threaded hole corresponding to a support stud and a second threaded hole corresponding to a double-ended stud. The support stud is connected to the first threaded hole and locked with a hexagonal thin nut.

[0007] The aforementioned special fixture for milling the four ears of a flange joint comprises a horizontal pressure plate consisting of a wide plate body and a narrow strip working part located on the side of the wide plate body near the boss. The long through hole is located on the wide plate body, and the end of the narrow strip working part extends above the edge of the boss on the corresponding side.

[0008] The beneficial effects of this utility model are:

[0009] 1. When using, first use the angular pin and locating pin on the top surface of the boss to position the flange joint to be milled before milling. Then, use the ends of the two horizontal pressure plates to press down on the edge of the flange joint to be milled, further ensuring the positional stability of the flange joint to be milled above the boss, avoiding displacement when milling the four ear faces of the flange joint, solving the problem of poor clamping stability when milling the four ear faces of the flange joint, significantly improving the machining accuracy, and ensuring the flatness of the four ear faces.

[0010] 2. Before being locked and positioned, the horizontal pressure plate can be adjusted to a horizontal position by its own guide ridge and the guide groove at the top of the support stud, which is the horizontal feed position of the pressing. This makes operation convenient and further improves processing efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 yes Figure 1 Top view;

[0013] Figure 3 yes Figure 2 Sectional view along the AA direction.

[0014] In the diagram: 1. Double-ended stud, 2. Locking nut, 3. Horizontal pressure plate, 301. Wide plate body, 302. Narrow strip working part, 4. Upper washer, 5. Lower buffer spring, 6. Support stud, 7. Hexagonal thin nut, 8. Long through hole, 9. Base plate, 10. Flange joint, 11. Boss, 12. Guide ridge, 13. Angular pin, 14. Locating pin. Detailed Implementation

[0015] like Figures 1-3 As shown, the special fixture for milling the four ears of a flange joint includes a base plate 9 and a clamping mechanism.

[0016] The base plate 9 has a boss 11 in the middle of the upper surface for supporting the flange joint 10. The top surface of the boss 11 has two positioning holes arranged diagonally. One positioning hole has a angular pin 13 and the other positioning hole has a positioning pin 14. The pin heads of the angular pin 13 and the positioning pin 14 protrude from the top surface of the boss 11 and the protrusion height is less than the target thickness of the four ears of the flange joint 10.

[0017] The clamping mechanism consists of pressing assemblies symmetrically arranged on the left and right sides of the boss 11. Each pressing assembly includes a horizontal pressure plate 3 extending one end to the upper surface of the boss 11, a support stud 6 supported between the other end of the horizontal pressure plate 3 and the base plate 9, and a locking bolt assembly connecting the horizontal pressure plate 3 and the base plate 9. The horizontal pressure plate 3 has a corresponding elongated through hole 8 for the locking bolt assembly. A lower buffer spring 5 and an upper washer 4 are fitted onto the double-ended stud 1 of the locking bolt assembly. The lower end of the double-ended stud 1 is fixedly connected to the base plate 9, and the upper end passes through the elongated through hole 8 and is connected to a locking nut 2. The lower end of the support stud 6 is fixedly connected to the base plate 9, and the upper end has a guide groove. The bottom surface of the horizontal pressure plate 3 has a guide protrusion 12 that mates with the guide groove.

[0018] In this embodiment, the base plate 9 is provided with a first threaded hole corresponding to the support stud 6 and a second threaded hole corresponding to the double-ended stud 1. The support stud 6 is connected to the first threaded hole and locked with a hexagonal thin nut 7. The horizontal pressure plate 3 is composed of a wide plate body 301 and a narrow strip working part 302 located on the side of the wide plate body 301 near the boss 11. The elongated through hole 8 is located on the wide plate body 301, and the end of the narrow strip working part 302 extends above the edge of the boss 11 on the corresponding side.

[0019] Operating instructions:

[0020] See Figures 1-3 The flange joint 10 with four ears to be milled is placed on the top surface of the boss 11 of the base plate 9. The pin heads of the angular pin 13 and the positioning pin 14 are respectively located in the holes of the two diagonal ears of the flange joint 10 to achieve machining positioning.

[0021] Move the left and right horizontal pressure plates 3. The ends of the narrow working parts 302 of the two horizontal pressure plates 3 press against the two side edges of the flange joint 10, avoiding the four ear faces. See [link / reference]. Figure 2 Tighten the lock nut 2 to press the horizontal pressure plate 3 against the flange joint 10, thus locking and fixing it in preparation for milling operations.

[0022] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A fixture for milling four ear surfaces of a flange joint, comprising a base plate and a clamping mechanism, characterized in that: The upper surface of the base plate has a boss in the middle for supporting the flange joint. The top surface of the boss has two positioning holes arranged diagonally. One positioning hole has an angular pin and the other positioning hole has a positioning pin. The pin heads of the angular pin and the positioning pin protrude from the top surface of the boss and the protrusion height is less than the target thickness of the four ears of the flange joint. The clamping mechanism consists of crimping assemblies symmetrically arranged on the left and right sides of the boss. The crimping assembly includes a horizontal pressure plate with one end extending to the upper surface of the boss, a support stud supported between the other end of the horizontal pressure plate and the base plate, and a locking bolt pair connecting the horizontal pressure plate and the base plate. The horizontal pressure plate has a long through hole corresponding to the locking bolt pair. The double-ended stud of the locking bolt pair is fitted with a lower buffer spring and an upper washer. The lower end of the double-ended stud is connected and fixed to the base plate, and the upper end passes through the long through hole and is connected to the locking nut. The lower end of the support stud is connected and fixed to the base plate, and the upper end has a guide groove. The bottom surface of the horizontal pressure plate has a guide protrusion that cooperates with the guide groove.

2. The special fixture for milling four ear faces of a flange joint according to claim 1, characterized in that: The base plate is provided with a first threaded hole corresponding to the support stud and a second threaded hole corresponding to the double-ended stud. The support stud is connected to the first threaded hole and locked with a hexagonal thin nut.

3. The fixture for milling four ear faces of a flange joint according to claim 1, wherein: The horizontal pressure plate consists of a wide plate body and a narrow strip working part located on the side of the wide plate body near the boss. The elongated through hole is located on the wide plate body, and the end of the narrow strip working part extends above the edge of the boss on the corresponding side.

Images