CN106079003A - A bionic wood rotary friction welding device - Google Patents

Abstract

A kind of bionical timber friction welding device, this device includes hand held electric drill, electric drill chuck, U-shaped cylinder, grasps loose one's grip parts, T-shaped push rod and fixed station；Grasp and loose one's grip parts and T-shaped push rod is arranged on the center of U-shaped cylinder interior；Grasping parts of loosing one's grip are megaphone-shaped, including cone section and direct tube section, match with dowel and T-shaped push rod respectively inside it；And cone section is the most uniformly divided at least 3 fan shape leafs, internal in bionical zigzag structure；The inner surface of U-shaped cylinder is provided with multiple interior guide pad, and cone section outer surface is provided with multiple outer guide pad, interior guide pad and outer guide pad and is meshed.This bionical friction welding device advantages of simple, it is possible to realize dowel and stop the rotation with relatively high acceleration, postwelding is wound around degree affects less on adhesion strength and the fiber at fusing interface.

Description

A bionic wood rotary friction welding device

technical field

The invention relates to a wood rotary friction welding device, in particular to a bionic wood rotary friction welding device and method, belonging to the technical field of wood friction welding.

Background technique

Wood friction welding is an efficient and environmentally friendly joining technology between wood. Wood friction welding technology can complete the connection between wood in a few seconds, and does not require any adhesives. It is a sustainable green wood processing technology without any environmental pollution. At present, wood friction welding is mainly divided into linear reciprocating friction welding technology and high-speed rotary friction welding technology of wooden tenons. For the linear reciprocating friction welding method of wood, it is mainly through upgrading the equipment for welding thermoplastics, applying pressure between the wood to be welded, and reciprocating linear motion between the two pieces of wood, under the action of interface friction, the interface temperature Elevation makes the polymers such as lignin, cellulose and hemicellulose of wood melt, deform, entangle, etc., and the polymer at the welding interface cools and solidifies under the action of maintaining a certain pressure to complete the welding of wood.

For the wooden tenon rotary friction welding method, the high-speed rotary welding of the wooden tenon is mainly driven by the rotating motor into the pre-reserved channel of the base material whose diameter is smaller than the tenon. Due to the effect of interference fit and high-speed rotation, the friction between the tenon and the substrate interface generates a lot of heat. As the temperature rises, the interface polymer melts, deforms, and entangles. As the rotation stops, the gap between the tenon and the substrate is completed. of welding. After the rotating motor stops, under the action of inertial force, the wooden tenon will continue to rotate until it stops slowly, that is to say, the wooden tenon will decelerate with a small acceleration. During this process, the rotating motor drives the tenon to stop slowly, so that the melting interface cannot be bonded well, and the degree of fiber winding is reduced, which seriously reduces the strength of the welding interface after welding. Therefore, in view of the problems existing in the rotary friction welding of wooden tenons, it is urgent to develop a welding device that stops the rotation with a large acceleration after welding and has a low impact on the interface composition and structure.

Contents of the invention

The purpose of the present invention is to provide a bionic wood rotary friction welding device, which not only has a simple structure, but also can stop the rotation of the tenon at a relatively high acceleration, so as to influence the bonding strength and fiber winding degree of the melting interface after welding smaller.

Technical scheme of the present invention is as follows:

A bionic wood rotary friction welding device is characterized in that: the device includes a hand-held electric drill, an electric drill chuck, a U-shaped cylinder, a grip-releasing part, a T-shaped push rod and a fixed table; the U-shaped cylinder is installed on the electric drill On the chuck; the grip-release part and the T-shaped ejector rod are installed in the center of the U-shaped cylinder; the grip-release part includes a horn section and a straight section, and the inside of the horn section is a cylindrical hole, the cylinder The surface of the shaped hole is a bionic zigzag structure, matching with the outer surface of the wooden tenon; the inside of the straight section is a stepped cylindrical hole, which is respectively matched with the boss part and the straight part of the T-shaped ejector rod, and the end of the boss part is matched with the straight rod part. The wooden tenon contact, the end of the straight rod part is fixed on the U-shaped cylinder by screws; the inner surface of the U-shaped cylinder is provided with a plurality of inner guide blocks, and the outer surface of the horn section is provided with a plurality of outer guide blocks. The inner guide shoe and the outer guide shoe are engaged.

The technical feature of the present invention is that the horn section is evenly divided into at least three fan-shaped petals along the circumference, and at least one outer guide block is provided on the outer surface of each fan-shaped petal.

Another technical feature of the present invention is that the gripping-releasing part is made of spring steel.

The technical solution of the present invention has the following advantages and outstanding technical effects: the tenon stops rotating at the maximum acceleration, so that the melting zone of the welding interface has enough time to cool and solidify, and can realize the bonding of the interface after welding to the maximum extent. At the same time, during the welding process, the fibers at the interface are entangled, and part of the polymer at the interface melts, which is more conducive to fiber entanglement, and the tenon stops rotating quickly after welding, so that the maximum fiber entanglement is frozen in the melting, cooling and solidified welding interface, These two mechanisms improve the strength of the tenon rotational friction welding interface.

Description of drawings

Fig. 1 is a front view of the bionic wood rotary friction welding device provided by the present invention.

Fig. 2 is a sectional view of the U-shaped cylinder of the present invention.

Fig. 3 is a left side view of the U-shaped cylinder of the present invention.

Fig. 4 is a schematic diagram of the installation structure of the grip-let go component and the T-shaped push rod.

Figure 5 is a left side view of the grip-release component of the present invention.

In the figure: 1-hand-held electric drill; 2-electric drill chuck; 3-U-shaped cylinder; 4-grip-release parts; 5-T-shaped ejector rod; 6-screw; ; 9-fixed table; 10-inner guide block; 11-outer guide block.

detailed description

The structure, principle and working process of the present invention will be further illustrated and described below in conjunction with the accompanying drawings.

Referring to shown in Fig. 1, device provided by the present invention comprises hand-held electric drill 1, electric drill chuck 2, U-shaped cylinder 3, grip-let go parts 4, T-shaped ejector rod 5 and fixed table 9; U-shaped cylinder 3 Installed on the electric drill chuck 2; grip-let go parts 4 and the T-shaped ejector rod are installed in the central position of the U-shaped cylinder 3; the T-shaped ejector rod 5 includes a boss part and a straight rod part, and the end of the boss part The part is in contact with the wooden tenon 7, the end of the straight rod part is fixed on the U-shaped cylinder 3 by the screw 6, and the perforated base material 8 is fixed on the fixed table 9.

Fig. 2 and Fig. 3 are the structural diagrams of U-shaped cylinder 3, one end of U-shaped cylinder 3 is installed on the electric drill chuck 2, and the T-shaped ejector rod 5 is fixed in the central position inside it by bolt 6; The inner surface of the other end of the cylinder 3 is evenly provided with at least three inner guide blocks 10 .

Fig. 4 is a schematic diagram of the installation structure of the grip-release part and the T-shaped mandrel. The exterior of the grip-release part 4 is in the shape of a trumpet and is generally made of spring steel. The part includes a horn section and a straight section, and the outer surface of the horn section is provided with a plurality of outer guide blocks 11, and the outer guide blocks 11 are engaged with the inner guide blocks 10; the horn section is evenly divided into at least 3 fan-shaped petals along the circumferential direction, each At least one outer guide block is provided on the outer surface of each fan-shaped petal. The inside of the trumpet section is a cylindrical hole, and the surface of the cylindrical hole is a bionic sawtooth structure (as shown in Figure 5), which is used to match the outer surface of the wooden tenon 7; The boss portion of the T-shaped ejector rod matches with the straight rod portion.

The inner surface of the U-shaped cylinder 3 is connected with an inner guide block 10. During the welding process, it drives and presses the grip-release part 4 to rotate at a high speed and clamps the wooden tenon 7 to realize the grip-release part 4. Bionic grasping process.

The grasping-releasing part 4, under the pressure of the U-shaped cylinder 3, can quickly clamp the wooden tenon 7 with a relatively large grasping force, so that the wooden tenon 7 can rotate at a high speed with the hand-held electric drill 1 without occurrence of Slip phenomenon.

The T-shaped mandrel 5, first, can withstand the wooden tenon 7, so that it does not move back during the rotation; second, after the welding is completed, the U-shaped cylinder 3 retreats, and the grip-releasing part 4 Leaving the wooden tenon 7, the boss at one end drives the grip-release part 4 to retreat, realizing the bionic release process of the grip-release part 4.

Working process of the present invention is as follows:

First push the hand-held electric drill 1 forward, so that one end of the wooden tenon 7 is pushed against the hole of the perforated substrate 8, and the other end is pushed against the boss of the T-shaped ejector rod; the hand-held electric drill 1 is started, and the high-speed rotating electric drill chuck 2 drives the U-shaped The cylinder 3 rotates at a high speed and continues to push the hand-held electric drill 1 forward. The U-shaped cylinder 3 drives the grip-release through the engagement of the inner inner guide block 10 and the outer guide block 11 on the outer surface of the grip-release part 4. Part 4 starts to rotate; at the same time, the force of the U-shaped cylinder 3 acting on the outer surface of the grip-release part 4 makes the inside grip the wooden tenon 7 tightly, and under the action of the inner bionic zigzag surface, the grip force is greater, realizing bionic Grasping process; continue to push forward, and the wooden tenon 7 is welded into the perforated substrate 8; after the welding process is completed, immediately pull the hand-held electric drill 1 backwards, and the grip-releasing part 4 moves back, and the internal bionic zigzag surface Leaving the wooden tenon 7, at this time, under the action of the boss at the end of the T-shaped mandrel 5, the grip-releasing part 4 retreats to realize the rapid bionic release process, and the welding is completed. During the welding process, the quality of the welding interface is mainly controlled by adjusting the rotation speed of the hand-held electric drill 1 and the speed at which the wooden tenon 7 is inserted into the perforated substrate 8 (ie, the speed at which the hand-held electric drill 1 is pushed forward).

During the wooden dowel spin welding process, imitating primate creatures that can slide along the edge of the object before holding and picking it up, grasping the object; fingers open at the same time, quickly throwing away the object, based on this process for grasping-releasing parts Do bionic design. The grip-releasing part clamps the tenon under the action of the U-shaped cylinder to realize the bionic grasping process, and then drives the tenon to rotate at high speed for welding. After the welding is completed, the grip-release part leaves the tenon, and the T-shaped ejector rod drives the grip-release part back, so that the tenon stops rotating quickly, realizing the bionic let-go process.

The inner surface of the grip-release part has a zigzag structure imitating snake skin, mantis arm and sawgrass, which has the excellent characteristic of increasing the interface contact force in a directional way, so that the grip-release part has a greater grip on the tenon Strong grip to ensure no slippage during spin welding.

Claims (3)

1. A bionic wood rotary friction welding device is characterized in that: the device comprises a hand-held electric drill (1), an electric drill chuck (2), a U-shaped cylinder (3), a grip-let go part (4), a T Shaped ejector rod (5) and fixed table (9); U-shaped cylinder (3) is installed on the electric drill chuck (2); grip-release parts (4) and T-shaped ejector rod are installed on U-shaped cylinder ( 3) The center position of the inside; the grip-release part (4) is in the shape of a trumpet, including a horn section and a straight section. The outer surface of the tenon (7) matches; the inside of the straight section is a stepped cylindrical hole, which is respectively matched with the boss part and the straight part of the T-shaped mandrel, and the end of the boss part is in contact with the tenon (7). The end of the straight rod part is fixed on the U-shaped cylinder (3) by screws (6); the inner surface of the U-shaped cylinder (3) is provided with a plurality of inner guide blocks (10), and the outer surface of the horn section is provided with A plurality of outer guide blocks (11), the inner guide block (10) and the outer guide block (11) are engaged. 2. A bionic wood rotary friction welding device as claimed in claim 1, characterized in that: the horn section is evenly divided into at least 3 fan-shaped petals along the circumferential direction, and the outer surface of each fan-shaped petal is provided with at least one outer guide block (11). 3. A biomimetic wood rotary friction welding device according to claim 1 or 2, characterized in that, said grip-let go part (4) is made of spring steel.