Device for detecting outer diameter of copper pipe

Abstract

The invention discloses a device for detecting the outer diameter of a copper pipe, relates to the field of copper pipe detection, aims to solve the problem that the outer diameter detection is time-consuming and labor-consuming in the prior art, and adopts the technical scheme that two half dies are adopted to form a complete diameter detection die, and the two half dies are respectively arranged on two clamping jaws of a synchronous centering clamp; the two half dies are driven to be separated and closed through the opening and closing actions of the synchronous centering clamp, and then the drawing mechanism is arranged to draw a detected object. The diameter detection die is matched with the drawing mechanism, so that the to-be-detected copper pipe processing section can gradually pass through the die orifice of the diameter detection die, the outer diameter of the copper pipe processing section is comprehensively detected, and time and labor are saved. Furthermore, the diameter detection die adopts a form that the two semi-ring dies are butted, so that large-diameter smooth pipe sections at two ends can conveniently pass through the diameter detection die when the copper pipe is assembled and disassembled, the processing section is detected, and the device is simple in structure and convenient to operate and maintain.

Description

Technical Field

[0001] The invention relates to the technical field of copper tube detection, in particular to a copper tube outer diameter detection device. Background Art

[0002] During the copper tube processing, the outer diameter detection of the copper tube processing section is an important inspection item for the quality of the copper tube product. If the outer diameter is insufficient, there may be product problems such as insufficient wall thickness or excessive gap in the later assembly. If the outer diameter is too large, subsequent assembly may not be possible. The existing detection method uses manual multi-point detection for verification, which is not only time-consuming and labor-intensive, but also unable to achieve comprehensive detection. Especially for products processed in the middle section of the copper tube, the outer diameter of the processed section in the middle is smaller than the bare tube sections at both ends. If the reduction die is used directly for detection, there is a problem that the end of the tube cannot pass through or the gap between the reduction die mouth and the copper tube processing section is too large, and the detection purpose cannot be achieved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a copper tube outer diameter detection device, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention discloses a copper tube outer diameter detection device, which adopts the technical scheme of comprising a diameter detection die and a drawing mechanism, wherein the diameter detection die is on a synchronous centering fixture, and the drawing mechanism further comprises a tube drawing clamp block and a linear motion pair, wherein the clamping axis of the tube drawing clamp block is coaxial with the die hole axis of the diameter detection die; the tube drawing clamp block is connected to the linear motion pair, the direction of the linear motion pair is the same as the extension direction of the die hole axis of the diameter detection die, and the linear motion pair can move the detection object along the die hole axis; the diameter detection die comprises a plurality of fan-shaped modules, the die holes of the plurality of fan-shaped modules are opposite, the synchronous centering fixture has a plurality of jaws, the fan-shaped modules correspond to the jaws of the synchronous centering fixture one by one and are respectively connected to the jaws of the synchronous centering fixture; and a control system is further comprised, wherein the control system is connected to the linear motion pair. By setting a plurality of fan-shaped modules as the diameter detection die of the outer diameter, not only can a whole circle be synthesized for detection, but also separation can be made for loading and unloading of the detection object.

[0005] As a preferred technical solution of the present invention, a die fixture is installed on the jaws of the synchronous centering fixture, and the diameter detection die is installed on the die fixture. The die fixture can be used for the installation and driving of the diameter detection die.

[0006] As a preferred technical solution of the present invention, the linear motion pair includes a drawing cylinder and a linear guide pair, the linear guide pair is connected to the telescopic end of the drawing cylinder; the linear guide pair is connected to the tube drawing clamp; the control system is a pneumatic control system, and the pneumatic control system is connected to the drawing cylinder. The drawing cylinder can make the tube drawing clamp follow the linear guide pair to move linearly, so as to facilitate the pulling of the detection object to move linearly.

[0007] As a preferred technical solution of the present invention, the linear guide pair is connected to a cylinder seat, the cylinder seat is equipped with a finger cylinder, the finger cylinder is connected to the tube pulling clamp block; the pneumatic control system is connected to the finger cylinder. The finger cylinder can drive the tube pulling clamp block to move, thereby switching its clamping and releasing states, and in coordination with the reciprocating motion of the linear motion pair, the effect of intermittent long-distance pulling can be achieved.

[0008] As a preferred technical solution of the present invention, the fan-shaped module of the diameter checking die is a semicircular ring structure, the end faces of two fan-shaped modules are connected to form a full circular ring, and the inner ring of the fan-shaped module is chamfered.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention uses a diameter detection die in conjunction with a drawing mechanism, so that the copper tube processing section to be detected can gradually pass through the diameter detection die orifice, and the speed at which the copper tube passes through the diameter detection die varies according to the friction between the diameter detection die and the copper tube, thereby comprehensively detecting the outer diameter of the copper tube processing section, and the detection process saves time and effort. Furthermore, the diameter detection die adopts the form of docking of multiple fan-shaped dies, which can facilitate the large-diameter light tube sections at both ends to pass through the diameter detection die when loading and unloading the copper tube, thereby detecting the processing section. The device has a simple structure, is easy to operate and maintain, and has high detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 The schematic diagram of the structure of the fan-shaped module of the diameter detection module of the present invention is Figure 1 ; Figure 3 The schematic diagram of the structure of the fan-shaped module of the diameter detection module of the present invention is Figure 2 ; Figure 4 This is a schematic diagram of the diameter detection mold structure of the present invention; Figure 5 This is the control principle diagram of the present invention.

[0011] In the figure: 1. Synchronous centering fixture; 2. Die fixture; 3. Diameter inspection die; 301. Mounting hole; 302. Bolt; 4. Pipe drawing clamp; 5. Finger cylinder; 6. Cylinder seat; 7. Drawing cylinder; 8. Pull rod; 9. Mounting seat; 10. Linear guide pair; 11. Pipe processing section. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0013] like Figures 1 to 5 As shown, the present invention discloses a copper tube outer diameter detection device, which adopts a technical solution comprising a synchronous centering fixture 1, on which there are two synchronously moving jaws, both of which are equipped with a die fixture 2, and each of which has two threaded holes. The die fixture 2 is equipped with a diameter detection die 3, such as Figures 2 to 4 As shown, the diameter checking die 3 includes two fan-shaped modules, both of which are semi-ring dies, with mounting holes 301 on the inner ring surface, and the mounting holes 301 have internal threads, and the positions and sizes of the threaded holes on the die fixture 2 correspond to each other, and the fan-shaped modules can be mounted on the die fixture 2 by using bolts 302 to engage with the mounting holes 301 and the threaded holes, and the fan-shaped modules are provided with countersunk holes for accommodating the countersunk heads of the bolts 302. The two jaws of the synchronous centering fixture 1 move toward each other to close the two fan-shaped modules to form a full circle, and after closing, they form a diameter reduction die, but the inner diameter of the die opening is the same as the standard outer diameter of the tube processing section 11 of the copper tube.

[0014] In order to be able to pull the copper tube to move, a pulling mechanism is also set up, which includes a pulling cylinder 7. The pulling cylinder 7 is fixedly installed through a mounting seat 9, and its pull rod 8 is connected to the slider of the linear guide pair 10. The slider is in sliding contact with the slide rail of the linear guide pair 10. The pulling cylinder 7 provides power, and the linear guide pair 10 can constrain the moving direction. A cylinder seat 6 is also installed on the slider, and a finger cylinder 5 is installed on the cylinder seat 6. The finger cylinder 5. A pipe pulling clamp 4 is installed on the clamping claw of the finger cylinder 5. In order to achieve the detection effect, the pulling cylinder 7 uses a cylinder with a small cylinder diameter and a small pulling force.

[0015] like Figure 5 As shown, in order to control the movement of the cylinder, a control system is also provided. The control system includes a microprocessor and a control button. The microprocessor is electrically connected to the control button and three air circuit control systems. The three air circuit control systems are all connected to an air source. The first air circuit control system is connected to the drawing cylinder 7 through an air pipe, the second air circuit control system is connected to the finger cylinder 5 through an air pipe, and the third air circuit control system is connected to the synchronous centering fixture 1 through an air pipe. In order to detect whether the drawing cylinder 7 is fully extended, a travel switch is installed at the farthest point of the slider travel of the linear guide pair 10. The microprocessor is electrically connected to the travel switch. Working principle of the present invention: After the staff powers on the device, they press the opening button of the synchronous centering fixture 1, and the microprocessor controls the third air circuit control system to open the synchronous centering fixture 1. The jaws of the synchronous centering fixture 1 separate the two fan-shaped modules of the diameter detection die 3 through the die fixture 2, and the bare tube section of the copper tube to be inspected passes through the die opening of the diameter detection die 3. The closing button is operated, and the microprocessor controls the third air circuit control system to open the synchronous centering fixture 1. The jaws of the synchronous centering fixture 1 close the two fan-shaped modules of the diameter detection die 3 through the die fixture 2 and are sleeved on the tube processing section 11 of the copper tube to be inspected. At this time, the bare tube section of the tube is located in the tube pulling clamp 4. The start button is pressed, and the microprocessor controls the second air circuit control system to activate the finger cylinder 5, so that the tube pulling clamp 4 clamps the tube. The microprocessor then controls the first air circuit control system to extend the drawing cylinder 7 to pull the tube. Since the cylinder diameter of the drawing cylinder 7 is small and the drawing force is weak, if the outer diameter of the tube processing section 11 is too large, the friction between it and the diameter checking die 3 is large, and the thrust of the drawing cylinder 7 is not enough to overcome the friction or the tube moves slowly. If the outer diameter of the tube processing section 11 is too small, the gap between it and the diameter checking die 3 is large, the friction is small or there is no friction, and the tube moves quickly.

[0016] After the microprocessor detects the slider signal through the travel switch, it determines that the pulling cylinder 7 is fully extended, and the microprocessor controls the second air circuit control system to activate the finger cylinder 5, so that the tube pulling clamp 4 leaves the tube. The microprocessor then controls the first air circuit control system to reset the pulling cylinder 7, and clamps and pulls again. This cycle is repeated until the detection of the tube processing section 11 is completed.

[0017] Finally, whether the outer diameter of the pipe processing section 11 is qualified is determined by judging whether the pipe is pulled and the time taken to complete the test.

[0018] The circuits and mechanical connections involved in the present invention are conventional means used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, which are common knowledge.

[0019] Components not described in detail herein are prior art.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A copper tube outer diameter detection device, characterized in that: The invention comprises a diameter checking die (3) and a drawing mechanism, wherein the diameter checking die (3) is on a synchronous centering fixture (1), and the drawing mechanism further comprises a tube drawing clamp block (4) and a linear motion pair, wherein the clamping axis of the tube drawing clamp block (4) is coaxial with the die hole axis of the diameter checking die (3); the tube drawing clamp block (4) is connected to the linear motion pair, the direction of the linear motion pair is the same as the extension direction of the die hole axis of the diameter checking die (3), and the linear motion pair can move the detection object along the die hole axis; the diameter checking die (3) comprises a plurality of fan-shaped modules, the die holes of the fan-shaped modules are opposite to each other, the synchronous centering fixture (1) has a plurality of clamping jaws, the fan-shaped modules correspond to the clamping jaws of the synchronous centering fixture (1) one by one and are respectively connected to the clamping jaws of the synchronous centering fixture (1); and the invention further comprises a control system, wherein the control system is connected to the linear motion pair.

2. The copper tube outer diameter detection device according to claim 1, characterized in that: A die fixture (2) is mounted on the jaws of the synchronous centering fixture (1), and the diameter checking die (3) is mounted on the die fixture (2).

3. The copper tube outer diameter detection device according to claim 1, characterized in that: The linear motion pair comprises a drawing cylinder (7) and a linear guide pair (10), wherein the linear guide pair (10) is connected to the telescopic end of the drawing cylinder (7); the linear guide pair (10) is connected to the tube drawing clamp (4); and the control system is a pneumatic control system, which is connected to the drawing cylinder (7).

4. The copper tube outer diameter detection device according to claim 3, characterized in that: The linear guide rail pair (10) is connected to a cylinder seat (6), a finger cylinder (5) is mounted on the cylinder seat (6), and the finger cylinder (5) is connected to the tube extraction clamp (4); the pneumatic control system is connected to the finger cylinder (5).

5. The copper tube outer diameter detection device according to claim 1, characterized in that: The fan-shaped module of the diameter checking die (3) is a semicircular ring structure, and the end faces of two fan-shaped modules are connected to form a full circular ring, and the inner ring of the fan-shaped module has a chamfer.

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