Machining clamp for double inclined holes of square pipe fitting

Abstract

The utility model discloses a square pipe fitting double inclined hole machining clamp which comprises a bottom plate, a V-shaped block and a check block, the V-shaped block and the check block are arranged on the bottom plate, lifting hooks are further arranged at the four corners of the bottom plate, and a pair of pressing plates are arranged on the side edges of the V-shaped block through bolts. The V-shaped block is of a special-shaped structure formed by obliquely cutting a V-shaped groove along a long edge of a long-strip rectangular block, a long groove perpendicular to the bottom end is further formed in the tip end of the V-shaped groove, two inclined holes are formed in the long groove, the two end faces of the V-shaped groove form a 90-degree right angle, and the angle a formed by the inclined end face, close to the bottom end, of the V-shaped groove and the bottom end is determined by the angle between the inclined face hole of the square tube and the plane of the square tube. According to the clamp, the structural characteristics of the connecting frame and the performance condition of machining equipment are combined, and the clamping and machining problems of square, rectangular, hexagonal and other pipe fittings and inclined holes with the axes not perpendicular to the four sides are solved. The clamp has the advantages of being rapid in installation and positioning and simple and efficient in clamping, and the production efficiency of square pipe fitting double-inclined-hole machining is remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining, and particularly relates to a machining fixture for double inclined holes of square pipe fittings. Background Art

[0002] Referring to Figures 1-3 , which is a square pipe fitting. For square pipe fittings with double inclined holes whose axes are not perpendicular to the four sides, the following problems exist during machining: it is easy to have deviations during the machining of inclined holes, the clamping of pipe fittings is difficult, with low efficiency, and it is not easy to ensure the stability of the machining process and the accuracy of machining dimensions, affecting the machining quality and production efficiency of products. Moreover, no targeted clamping fixtures for machining inclined holes of pipe fittings have been found in the currently disclosed patent documents. Summary of the Utility Model

[0003] In order to solve the above problems, the utility model aims to provide a machining fixture for double inclined holes of square pipe fittings.

[0004] To achieve the above object, the utility model adopts the following technical solutions: a machining fixture for double inclined holes of square pipe fittings, including a bottom plate, a V-shaped block and a stop block arranged on the bottom plate, hooks are also arranged at the four corners of the bottom plate, and a pair of pressing plates are arranged on the side of the V-shaped block through bolts;

[0005] The V-shaped block is a special-shaped structure obtained by obliquely cutting a long rectangular block along one long side to form a V-shaped groove. A long groove perpendicular to the bottom end is also opened at the tip of the V-shaped groove, two inclined holes are opened at the long groove, the two end faces of the V-shaped groove are at a 90-degree right angle, and the angle a formed by the inclined end face of the V-shaped groove close to the bottom end and the bottom end is determined by the angle between the inclined hole of the square pipe and the plane of the square pipe.

[0006] Preferably, the bottom plate is a rectangular plate, and cylindrical pin holes and screw hole pins are opened on the bottom plate. The bottom plate is connected to the stop block and the V-shaped block by inserting an internal thread cylindrical pin and a screw into the cylindrical pin hole and the screw hole pin respectively.

[0007] Preferably, a directional pin hole is also opened at the bottom end of the bottom plate, and a directional pin is installed in the directional pin hole to connect the bottom plate with the processing machine tool.

[0008] Preferably, the upper end face of the stop block is a trapezoidal structure, and a tool setting block is arranged on the vertical surface of the trapezoid.

[0009] Preferably, the pressing plate is a flat plate with a waist-shaped hole in the middle. The pressing plate is connected to the bottom plate through bolts and is connected to the V-shaped block through a stud bolt, a washer and a nut in a matching manner.

[0010] Preferably, an installation hole is opened on the upper end face of the V-shaped block, the waist-shaped hole of the pressing plate corresponds to the installation hole, and the square pipe is tightened by a stud bolt, a washer and a nut in a matching manner.

[0011] Preferably, the hook is in an inverted "J" shape.

[0012] Compared with the prior art, the present utility model has the following advantages: The processing fixture disclosed by the present utility model combines the structural characteristics of the connecting frame and the performance of the processing equipment, and solves the clamping and processing problems of inclined holes on square, rectangular, hexagonal and other types of pipe fittings whose axes are not perpendicular to the four sides. Through the special structure of the V-shaped block, the square pipe can be quickly positioned at an angle when placed on the V-shaped block, so that the axis of the inclined hole is perpendicular to the bottom surface of the fixture installation, and the coincidence of the hole center axis and the spindle of the vertical hole processing machine tool can be achieved. This fixture has the characteristics of rapid installation and positioning, simple and efficient clamping, and significantly improves the production efficiency of the inclined hole processing of pipe fittings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the specific embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is the front view of the square pipe in the present utility model;

[0015] Figure 2 It is the top view of the square pipe in the present utility model;

[0016] Figure 3 It is Figure 1 the A-A sectional view of

[0017] Figure 4 It is the three-dimensional view of the V-shaped block of the processing fixture in the present utility model;

[0018] Figure 5 It is Figure 4 the side view of

[0019] Figure 6 It is Figure 4 the top view of

[0020] Figure 7 It is the front view of the processing fixture in the present utility model;

[0021] Figure 8 It is the top view of the processing fixture in the present utility model;

[0022] Figure 9 It is the side view of the processing fixture in the present utility model;

[0023] Figure 10 It is the front view of the processing fixture of the present utility model clamping the square pipe;

[0024] Figure 11 This is the top view of the square tube clamped by the processing fixture in the present utility model;

[0025] Figure 12 This is the side view of the square tube clamped by the processing fixture in the present utility model;

[0026] In the figure, 1 - V - block; 2 - bottom plate; 3 - stop block; 4 - tool setting block; 5 - pressing plate; 6 - lifting hook; 7 - orientation pin; 8 - screw; 9 - internal thread cylindrical pin; 10 - double - end bolt; 11 - bolt; 12 - washer; 13 - nut; 14 - square tube; 1 - 1 - long groove; 1 - 2 - inclined hole. Specific embodiments

[0027] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter of the present utility model is limited to the following embodiments. Without departing from the above - mentioned technical idea of the present utility model, all modifications, substitutions, and changes made according to ordinary technical knowledge and conventional means in the art are included in the scope of the present utility model.

[0028] Refer to Figures 1-3 , which is a square pipe fitting. Two inclined holes need to be opened in the pipe fitting. The fixture of the present utility model is used to clamp and process the square tube 14.

[0029] Refer to Figures 4-6 , which are the main components of the fixture. The V - block 1 provides the installation and fixing support for the square tube 14. The V - angle a is determined by the angle between the inclined hole of the square tube and the plane of the square tube. When the square tube part is placed on the V - block, the angle positioning of the square tube can be quickly realized, so that the axis of the inclined hole is perpendicular to the installation bottom surface of the fixture, and the axis of the hole center can coincide with the spindle of the vertical hole - processing machine tool; Two holes 1 - 2 are opened as the avoidance holes for the inclined - hole processing tool; The long groove 1 - 1 is opened to facilitate the processing of the two V - shaped surfaces. The V - block 1 is a special - shaped structure of a long rectangular block with a V - shaped groove obliquely cut out along one long side. A long groove 1 - 1 perpendicular to the bottom end is also opened at the tip of the V - shaped groove, and two inclined holes 1 - 2 are opened at the long groove 1 - 1, and the two end faces of the V - shaped groove are at a 90 - degree right angle.

[0030] Refer to Figures 7-12, A processing fixture for double inclined holes of a square pipe fitting mainly consists of a V-shaped block 1, a bottom plate 2, a stop block 3, a tool setting block 4, a pressing plate 5, a lifting hook 6, a positioning pin 7, a GB70.1 M12×20Zn.D screw 8, a GB120.2 10×30 internal thread cylindrical pin 9, a GB898 M20×80 stud 10, a GB5782 M12×160Zn.D bolt 11, a GB1230 20Zn.D washer 12 and a GB41 M20 8.8 nut 13. It includes a bottom plate 2, a V-shaped block 1 and a stop block 3 arranged on the bottom plate 2. Lifting hooks 6 are also arranged at the four corners of the bottom plate 2. A pair of pressing plates 5 are arranged on the side of the V-shaped block 2 through a GB5782 M12×160Zn.D bolt 11.

[0031] A pin hole corresponding to the positioning pin 7 is opened on the bottom plate 2. The positioning pin 7 is installed in the pin hole, and the positioning pin 7 is inserted into the T-shaped groove on the working platform of the hole processing machine tool to realize the rapid orientation of the fixture on the machine tool working platform. Screw holes and pin holes corresponding to the GB70.1 M12×20Zn.D screw 8 and the GB120.2 10×30 internal thread cylindrical pin 9 are also opened on the bottom plate 2 to connect the stop block 3 with the bottom plate 2 and the bottom plate 2 with the V-shaped block 1, realizing the side end face positioning of the square pipe fitting and the rapid and accurate positioning of the V-shaped block 1 on the bottom plate 2.

[0032] The stop block 3 provides the side end face positioning surface of the square pipe 14. The upper end face of the stop block 3 is of a trapezoidal structure, and a tool setting block 4 is arranged on the vertical surface of the trapezoid. The tool setting block 4 provides a tool setting reference for the coordinate movement of the hole distance of the double inclined holes of the square pipe fitting processed by the machine tool, ensuring the hole distance dimension.

[0033] The pressing plate 5 is connected with the V-shaped block 1 by supporting with a GB898 M20×80 stud 10, a GB1230 20Zn.D washer 12 and a GB41 M20 8.8 nut 13, providing pressing during the processing of the square pipe to realize the stability of the processing. It is connected with the bottom plate 2 through a bolt 11; the lifting hook 6 provides hoisting for the fixture; the positioning pin 7 is installed in the pin hole of the bottom plate 2. When the fixture is used, it is inserted into the T-shaped groove on the working platform of the hole processing machine tool to realize the rapid orientation of the fixture on the machine tool working platform.

[0034] A processing fixture for double inclined holes on a square pipe. This fixture combines the structural characteristics of the connecting frame and the performance of the processing equipment, and solves the clamping and processing problems of inclined holes on square, rectangular, hexagonal and other types of pipe fittings whose axes are not perpendicular to the four sides. This fixture has the characteristics of rapid installation and positioning, simple and efficient clamping, and significantly improves the production efficiency of processing double inclined holes of square pipe fittings.

[0035] The above has introduced in detail a processing fixture for double inclined holes of a square pipe fitting provided by the present utility model. Specific examples are used in this article to elaborate on the structure and working principle of the present utility model. The description of the above embodiments is only used to help understand the method and core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the scope of protection of the claims of the present utility model.

Claims

1. A processing fixture for double inclined holes of square pipe fittings, characterized by: It comprises a bottom plate (2), a V-shaped block (1) and a stopper (3) arranged on the bottom plate (2), hooks (6) are arranged at the four corners of the bottom plate (2), and a pair of pressing plates (5) are arranged on the side of the V-shaped block (1) via bolts (11); The V-shaped block (1) is a special-shaped structure in which a V-shaped groove is obliquely cut out along a long side of a long rectangular block. A long groove (1-1) perpendicular to the bottom end is also provided at the tip of the V-shaped groove. Two oblique holes (1-2) are provided at the long groove (1-1). The two end surfaces of the V-shaped groove form a right angle of 90 degrees. The angle a formed by the oblique end surface of the V-shaped groove close to the bottom end and the bottom end is determined by the angle between the oblique hole of the square tube (14) and the plane of the square tube (14).

2. The processing fixture for double inclined holes of square pipes according to claim 1 is characterized in that: The bottom plate (2) is a rectangular plate, and is provided with a cylindrical pin hole and a screw hole. The bottom plate (2) and the stopper (3), and the bottom plate (2) and the V-shaped block (1) are connected by inserting an internal thread cylindrical pin (9) and a screw (8) into the cylindrical pin hole and the screw hole, respectively.

3. The processing fixture for double inclined holes of square pipes according to claim 1 is characterized in that: A directional pin hole is also provided at the bottom end of the base plate (2), and a directional pin (7) is installed in the directional pin hole so that the base plate (2) is connected to the processing machine tool.

4. The processing fixture for double inclined holes of square pipes according to claim 1 is characterized in that: The upper end surface of the stopper (3) is a trapezoidal structure, and a tool setting block (4) is arranged on the vertical surface of the trapezoid.

5. The processing fixture for double inclined holes of square pipes according to claim 1 is characterized in that: The pressing plate (5) is a flat plate with a waist-shaped hole in the middle. The pressing plate (5) is connected to the bottom plate (2) via bolts (11) and is connected to the V-shaped block (1) via stud bolts (10), washers (12) and nuts (13).

6. The processing fixture for double inclined holes of square pipes according to claim 1 is characterized in that: The upper end surface of the V-shaped block (1) is provided with a mounting hole, and the waist-shaped hole of the pressing plate (5) corresponds to the mounting hole, and is tightened to the other pipe (14) by means of stud bolts (10), washers (12) and nuts (13).

7. The processing fixture for double inclined holes of square pipes according to claim 1 is characterized in that: The hook (6) is in an inverted "J" shape.

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