Semi-automatic welding machine

Abstract

The present invention proposes a semi-automatic welding machine, comprising a frame, on which a welding machine body, a pushing mechanism, and a limiting mechanism are mounted. The welding machine body comprises a core shaft, a positive electrode block, and a negative electrode block. The limiting mechanism is located at one end of the core shaft and comprises a limiting sleeve fixed to the frame. The limiting sleeve is provided with a blind hole corresponding to the end position of the core shaft. The pushing mechanism comprises a pushing jaw cylinder that moves back and forth along the axial direction of the core shaft. The positive electrode block is located on the side of the core shaft close to the limiting mechanism and is moved radially along the core shaft by the welding jaw cylinder. The negative electrode block is located on the side of the core shaft away from the limiting mechanism and is moved radially along the core shaft by the negative electrode cylinder. The above-mentioned semi-automatic welding machine realizes automatic welding of the flexible joint of the endotracheal tube and the ventilation tube, thereby improving production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of medical appliance processing, in particular to a semi-automatic welding machine for producing endotracheal tubes. Background Art

[0002] Endotracheal intubation is an important medical device used in the rescue of critically ill patients with general anesthesia, cardiopulmonary resuscitation, and respiratory dysfunction. The traditional endotracheal intubation tube is an integrated structure that cannot meet the needs of patients. If the whole tube is made of a softer material, it is easy to cause intubation difficulties and insufficient ventilation. If the whole tube is made of a harder material, it is easy to cause damage to the nasal mucosa and bleeding. For this reason, our company has designed a split endotracheal intubation tube, such as Figure 1 As shown, the endotracheal tube includes a ventilation tube and a flexible joint welded to one end of the ventilation tube. The ventilation tube and the flexible joint are made of PVC materials with different Shore hardness. For this purpose, our company has also designed a semi-automatic welding machine for welding the ventilation tube and the flexible joint to improve production efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a semi-automatic welding machine for connecting a ventilation tube and a flexible joint constituting an endotracheal cannula in order to overcome the deficiencies of the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is implemented as follows: a semi-automatic welding machine includes a frame, on which a welding machine body, a pushing mechanism and a limiting mechanism are installed, the welding machine body includes a positive electrode block and a negative electrode block, and one end of a core shaft with a workpiece to be welded is inserted into the limiting mechanism, the limiting mechanism includes a limiting sleeve fixed to the frame by an end fixing plate, and the limiting sleeve is provided with a blind hole for inserting the core shaft, the pushing mechanism includes a pushing clamp cylinder that moves back and forth along the axial direction of the core shaft, the positive electrode block is located on the side of the core shaft close to the limiting mechanism and is moved radially along the core shaft by the welding clamp cylinder, and the negative electrode block is located on the side of the core shaft away from the limiting mechanism and is moved radially along the core shaft by the negative electrode cylinder.

[0005] Specifically, the positive electrode block is moved by a welding clamp cylinder fixed on the frame. The two clamps of the welding clamp cylinder are respectively located on the upper and lower sides of the core shaft. The positive electrode block is fixed on the upper clamp of the welding clamp cylinder. The lower surface of the positive electrode block is provided with an arc groove. The lower clamp of the welding clamp cylinder is fixed with a welding support block corresponding to the upper and lower positions of the positive electrode block. The top surface height of the welding support block exceeds the height of the lower clamp and is also provided with an arc groove.

[0006] Specifically, the reciprocating movement of the pushing jaw cylinder along the axial direction of the core shaft is achieved by a ball screw connected to a servo motor. The pushing jaw cylinder is fixedly connected to a ball nut sleeved on the ball screw and reciprocates along the axial direction of the core shaft with the ball nut.

[0007] Specifically, the two clamping jaws of the pushing clamping jaw cylinder are respectively equipped with a front clamping head and a rear clamping head, and the front clamping head is L-shaped.

[0008] Specifically, the negative electrode block is located on the rear side of the core shaft and is installed on the negative electrode block fixing plate through a horizontally arranged guide shaft. The end of the guide shaft away from the negative electrode block passes through the negative electrode block fixing plate and is provided with a limit ring. The negative electrode block fixing plate is connected to the negative electrode cylinder that extends and retracts radially along the core shaft. An arc groove is provided on the side of the negative electrode block facing the core shaft. A spring is provided on the guide shaft, and the spring is located between the negative electrode block and the negative electrode block fixing plate.

[0009] Specifically, the outer periphery of the flexible joint and the vent pipe sleeved on the core shaft is also sleeved with a quartz tube.

[0010] The semi-automatic welding machine obtained by the above technical solution has the following beneficial effects:

[0011] 1. The welding of the flexible joint of the tracheal tube and the ventilation tube is realized by welding the main body. The setting of the limiting mechanism ensures the accurate welding position of the flexible joint and the ventilation tube. The setting of the pushing mechanism ensures the abutment of the flexible joint and the ventilation tube to avoid excessive welds.

[0012] 2. Installing a welding support block on the lower clamping jaw of the welding clamping cylinder that fixes the positive electrode block and the L-shaped front clamping head can support the core shaft to prevent the core shaft from falling out of the limiting mechanism when the positive electrode block abuts against the soft joint and the vent pipe;

[0013] 3. The setting of the quartz tube can limit the deformation of the flexible joint and the vent pipe during welding to the inside of the quartz tube, prevent the generation of bulges and improve the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the split type endotracheal cannula.

[0015] Figure 2 It is a structural schematic diagram of the entire semi-automatic welding machine.

[0016] Figure 3 It is a three-dimensional schematic diagram of the semi-automatic welding machine (excluding the frame).

[0017] Figure 4 It is a front view of the semi-automatic welding machine (excluding the frame).

[0018] Figure 5 It is a side view of the semi-automatic welding machine (excluding the frame).

[0019] In the figure, the frame 1; the horizontal mounting surface 1a; the vertical mounting surface 1b; the welding machine body 2; the positive electrode block 2a; the negative electrode block 2b; the pushing mechanism 3; the pushing jaw cylinder 3a; the servo motor 3b; the ball screw 3c; the ball nut 3d; the screw connecting plate 3e; the fixed main board 3f; the front chuck 3g; the rear chuck 3h; the limiting mechanism 4; the limiting sleeve 4a; the end fixing plate 4b; the negative electrode block fixing plate 5; the negative electrode cylinder fixing plate 6; the negative electrode cylinder 7; the guide shaft 8; the spring 9; the core shaft 10; the flexible joint 11; the vent pipe 12; the welding jaw cylinder 13; the welding support block 14; the welding fixing plate 15; the bottom wheel with support 16; and the quartz tube 17. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] The present invention provides a semi-automatic welding machine, including a frame 1, on which a welding machine body 2, a pushing mechanism 3 and a limiting mechanism 4 are installed. The welding machine body 2 includes a positive electrode block 2a and a negative electrode block 2b. The flexible joint 11 and the vent pipe 12 to be welded are sleeved on the core shaft. The negative electrode block 2b can abut against the core shaft 10, and the positive electrode block 2a can abut against the adjacent part of the flexible joint 11 and the vent pipe 12 sleeved on the core shaft 10. The welding machine body 2 uses the heat generated by the high-frequency magnetic field around the positive electrode block 2a to heat the flexible joint 11 and the vent pipe 12 so that the two are welded together. The pushing mechanism 3 is used to push the vent pipe 12 on the core shaft 10 to ensure that the vent pipe 12 abuts against the flexible joint 11. The limiting mechanism 4 is located at one end of the core shaft 10 close to the positive electrode block 2a, and plays a role in fixing the core shaft, while ensuring that the abutment between the flexible joint 11 and the vent pipe 12 is facing the positive electrode block 2a.

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] As shown in the figure, a semi-automatic welding machine includes a frame 1, on which a welding machine body 2, a pushing mechanism 3 and a limiting mechanism 4 are installed. A supporting bottom wheel 16 is provided at the bottom of the frame 1. The welding machine body 2 includes a positive electrode block 2a and a negative electrode block 2b. One end of a core shaft 10 with a flexible joint 11 and a vent pipe 12 is inserted into the limiting mechanism 4. The limiting mechanism includes a limiting sleeve 4a fixed to the frame 1 by an end fixing plate 4b. The limiting sleeve 4a is provided with a blind hole axially aligned with the core shaft 10 for inserting the flexible joint 11 to be welded. The pushing mechanism 3 includes a pushing clamp cylinder 3a that moves back and forth axially along the core shaft 10. The two clamps of the pushing clamp cylinder 3a are respectively located on the front and rear sides of the core shaft 10 and are used to push the vent tube 12 sleeved on the core shaft 10 to abut against the soft joint 11. The positive electrode block 2a is located above the side of the core shaft 10 close to the limiting mechanism 4 and is moved radially along the core shaft 10 by the welding clamp cylinder 13. The negative electrode block 2b is located on the side of the core shaft 10 away from the limiting mechanism 4, and the negative electrode block 2b is moved radially along the core shaft 10 by the negative electrode cylinder 7.

[0026] Specifically, the frame 1 includes a horizontal mounting surface 1a and a vertical mounting surface 1b. The end fixing plate 4b and the pushing mechanism 3 are both installed on a horizontally arranged fixed main board 3f located inside the frame 1. The top end of the end fixing plate 4b and the claws of the pushing clamp cylinder 3a pass through the horizontal mounting surface 1a of the frame 1. The welding clamp cylinder 13 is fixed to the fixed main board 3f through an L-shaped welding fixing plate 15. The welding fixing plate 15 is located on the side of the fixed main board 3f away from the end fixing plate 4b. The two claws of the welding clamp cylinder 13 pass through the vertical mounting surface 1b of the frame 1 and are respectively located on the upper and lower sides of the core shaft 10.

[0027] The positive electrode block 2a is fixed on the upper jaw of the welding jaw cylinder 13, and an arc groove is provided on the lower surface of the positive electrode block 2a. The welding jaw cylinder 13 is arranged inside the frame 1, and a welding support block corresponding to the upper and lower positions of the positive electrode block 2a is fixed on the lower jaw of the welding jaw cylinder. The top surface height of the welding support block exceeds the height of the lower jaw and is also provided with an arc groove.

[0028] The reciprocating movement of the pushing mechanism 3 along the axial direction of the core shaft 10 is realized by the ball screw 3c connected to the servo motor 3b. Specifically, the servo motor 3b is installed on the fixed main board 3f and connected to the ball screw 3c arranged along the axial direction of the core shaft 10. The pushing jaw cylinder 3a is fixedly connected to the ball nut 3d mounted on the ball screw 3c through the screw connecting plate 3e and reciprocates along the axial direction of the core shaft 10 with the ball nut 3d. The two jaws of the pushing jaw cylinder 3a are respectively equipped with a front chuck 3g and a rear chuck 3h, wherein the front chuck 3g is L-shaped and can provide a certain supporting effect on the core shaft 10. The opposite surfaces of the front chuck 3g and the rear chuck 3h are provided with an arc groove arranged along the axial direction of the core shaft 10 to avoid the core shaft 10.

[0029] The negative electrode block 2b is connected to one end of a horizontally arranged guide shaft 8 that passes through the vertical mounting surface of the frame 1. An arc-shaped groove is provided on the side of the negative electrode block 2b facing the core shaft 10. The other end of the guide shaft 8 passes through the vertically arranged negative electrode block fixing plate 5 located in the frame 1 and is sleeved with a limit ring. There are two guide shafts 8, and a spring 9 is sleeved on the guide shaft 8. The spring 9 is located between the negative electrode block 2b and the negative electrode block fixing plate 5. The negative electrode block fixing plate 5 is connected to the cylinder shaft of the negative electrode cylinder 7. The negative electrode cylinder 7 is fixed to the bottom of the fixed main board 3f through the negative electrode cylinder fixing plate 6. One end of the negative electrode cylinder fixing plate 6 passes through the negative electrode block fixing plate 5 and is slidably connected to the negative electrode block fixing block 5. Specifically, a through hole for the negative electrode cylinder fixing plate 6 to pass through is provided on the negative electrode block fixing plate 5, and a slider is fixed in the through hole. The slider slides on a slide rail provided on the top surface of the negative electrode cylinder fixing plate 6.

[0030] Furthermore, a quartz tube 17 is further sleeved on the outer periphery of the flexible joint 11 and the vent tube 12. The inner diameter of the quartz tube 17 is slightly larger than the outer diameter of the flexible joint 11 and the vent tube 12. During welding, the positive electrode block 2a abuts against the quartz tube 17 to prevent the liquid PVC melted by heat from bulging under the influence of gravity during the welding process of the flexible joint 11 and the vent tube 12, thereby affecting product quality.

[0031] During welding, first, the vent pipe 12 and the flexible joint 11 are respectively sleeved on the core shaft 10, and the arc-shaped wall at the front end of the flexible joint 11 abuts against the end of the core shaft 10, and the core shaft 10 is inserted into the limiting sleeve 4a, so that the front end of the flexible joint 11 abuts against the bottom of the blind hole of the limiting sleeve 4a, and the front chuck 3g and the rear chuck 3h on the pushing jaw cylinder 3a are close to each other so that the core shaft 10 falls on the front chuck 3g of the pushing jaw cylinder 3a, pushing the vent pipe 12 to move the vent pipe 12 toward the flexible joint 11, and the vent pipe 12 abuts against the flexible joint 11. The negative electrode block 2b abuts against the core shaft 10 under the action of the negative electrode cylinder 7, and the positive electrode block 2a is clamped together with the welding support block to the quartz tube 17 under the action of the welding jaw cylinder 13. Under the action of the magnetic field, the vent pipe 12 and the flexible joint 11 are heated, melted, and welded together.

[0032] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Any changes that may be made to certain parts thereof by those skilled in the art all reflect the principles of the present invention and fall within the scope of protection of the present invention.

Claims

1. A semi-automatic welding machine, comprising a frame, characterized in that: The welding machine body, the pushing mechanism and the limiting mechanism are installed on the frame; The first end of the mandrel, which is sleeved with the workpiece to be welded, is inserted into a limiting mechanism, wherein the limiting mechanism includes a limiting sleeve fixed to a frame, and the limiting sleeve is provided with a blind hole for inserting the first end of the mandrel; the workpiece to be welded is a flexible joint of an endotracheal tube and a ventilation tube, wherein the flexible joint is located at the first end of the mandrel; The pushing mechanism includes a pushing jaw cylinder capable of reciprocating along the axial direction of the core shaft, and the two jaws on the pushing jaw cylinder are respectively equipped with a front chuck and a rear chuck; The welding machine body includes a positive electrode block and a negative electrode block. The positive electrode block is located on the side of the core shaft close to the limiting mechanism and can reciprocate radially along the core shaft. The positive electrode block is fixed to the upper clamping jaw of the welding clamping jaw cylinder. The lower clamping jaw of the welding clamping jaw cylinder is fixed with a welding support block corresponding to the upper and lower positions of the positive electrode block. The two clamping jaws of the welding clamping jaw cylinder are respectively located on the upper and lower sides of the core shaft. The negative electrode block is located on the side of the core shaft away from the limiting mechanism and can move radially along the core shaft in the front-to-back direction; the front chuck and the rear chuck are located between the positive electrode block and the negative electrode block in the axial direction of the core shaft; the welding machine body uses the heat generated by the high-frequency magnetic field around the positive electrode block to heat the flexible joint and the vent pipe, so that the two are welded together.

2. The semi-automatic welding machine according to claim 1, characterized in that: The lower surface of the positive electrode block is provided with an arc groove, and the top surface of the welding support block is higher than the height of the lower clamping jaw and is also provided with an arc groove.

3. The semi-automatic welding machine according to claim 1, characterized in that: The reciprocating movement of the pushing jaw cylinder along the axial direction of the core shaft is achieved by a ball screw connected to a servo motor. The pushing jaw cylinder is fixedly connected to a ball nut sleeved on the ball screw and reciprocates along the axial direction of the core shaft with the ball nut.

4. The semi-automatic welding machine according to claim 1 or 3, characterized in that: The front clamp is L-shaped.

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