Noise reduction device for ultrasonic welding machine

Abstract

The utility model discloses a noise reduction device for an ultrasonic welding machine. The noise reduction device comprises a sound insulation cover, an adjustable driving mechanism, an upper sealing structure and a lower sealing structure, the upper die head is partially sleeved with the sound-proof cover, and the sound-proof cover is fixed to the machine head through an adjustable driving mechanism so that the sound-proof cover can move up and down relative to the upper die head; the lower sealing structure is arranged on the base, and the lower sealing structure and the bottom of the sound insulation cover are correspondingly arranged; the upper sealing structure is arranged on the top of the sound insulation cover. During machining, the sound insulation cover, the upper sealing structure and the lower sealing structure are combined to form the sealing cavity, noise generated during workpiece machining can be eliminated to the maximum extent, and harm to operators is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of noise reduction, and in particular relates to a noise reduction device for an ultrasonic welding machine. Background Art

[0002] The workshop processes the plastic casings of power adapters using a 15kHz ultrasonic welding machine. The welding process produces a strong, harsh sound that can affect the hearing and mood of the workshop staff.

[0003] At present, the noise reduction methods adopted by ultrasonic welding equipment manufacturers are: First, the ultrasonic machine is placed in a double-layer glass soundproof room, which is operated by a dedicated person. The operators are subject to greater auditory stimulation and need to wear special noise-canceling headphones. There are also the following defects: the soundproof room occupies an area of ​​about 3 square meters in the workshop, the material flow is not smooth, the ventilation is not smooth in summer, the temperature is high, and the cost of the double-layer glass soundproof room is about 6,000 yuan, which is relatively high; the second is to purchase a customized special semi-automatic lifting door soundproof cabinet, but it also has the following defects: it occupies an area of ​​about 1.5 square meters in the workshop, costs about 10,000 yuan, affects the processing speed, and reduces production efficiency by about 30%. Utility Model Content

[0004] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a noise reduction device for an ultrasonic welding machine to solve the problems mentioned in the background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A noise reduction device for an ultrasonic welding machine, the ultrasonic welding machine comprising a base and a head fixed above the base, a main cylinder being provided in the head, a push rod of the main cylinder being connected to the top of a vibrating assembly, a bottom end of the vibrating assembly being connected to an upper die head, and a lower die head corresponding to the upper die head being provided on the base;

[0007] The noise reduction device includes a soundproof cover, an adjustable driving mechanism, an upper sealing structure and a lower sealing structure;

[0008] The soundproof cover is partially sleeved on the outside of the upper die head, and the soundproof cover is fixed to the die head through an adjustable driving mechanism, so that the soundproof cover can move up and down relative to the upper die head;

[0009] The lower sealing structure is arranged on the base, and the lower sealing structure is arranged corresponding to the bottom of the sound insulation cover;

[0010] The upper sealing structure is arranged on the top of the sound insulation cover.

[0011] Furthermore, the adjustable driving mechanism includes a mounting plate and two driving cylinders, the two driving cylinders are symmetrically fixed on the two side walls of the machine head through long angle codes, the push rods of the two driving cylinders are fixedly connected to the mounting plate, the sound insulation cover is fixed to the bottom of the mounting plate, and the sound insulation cover and the mounting plate are correspondingly provided with a first passing channel.

[0012] Furthermore, the lower sealing structure is a sound insulation material with thickness, and the sound insulation material is a combination of one or more of sound insulation pads, sound insulation felts, sound absorbing cotton, and polyester fiber sound absorbing panels.

[0013] Furthermore, the upper sealing structure includes an inner sealing mechanism or an outer sealing mechanism or a combination of the inner sealing mechanism and the outer sealing mechanism.

[0014] Furthermore, the inner sealing mechanism is a rubber sealing ring, which is fixed in the first channel with an interference fit, and the rubber sealing ring is pressed on the outside of the upper die head part passing through the sound insulation cover. The outer ring of the rubber sealing ring is provided with a positioning ring, and the positioning ring is fixed on the mounting plate. The positioning ring is fixed by bonding or fastener connection.

[0015] Furthermore, the rubber sealing ring adopts a labyrinth sealing structure.

[0016] Furthermore, the external sealing mechanism is an elastic rubber sealing barrel structure, the top of the elastic rubber sealing barrel is fixed on the vibrating assembly, and the bottom of the elastic rubber sealing barrel is fixed on the mounting plate, so that a sealed cavity is formed in the elastic rubber sealing barrel.

[0017] Furthermore, a layer of sound-absorbing cotton is fixedly provided on the inner wall of the soundproof cover.

[0018] Furthermore, a through hole is provided on the soundproof cover, an exhaust hose is connected to the exhaust valve of the driving cylinder, and the air outlet end of the exhaust hose passes through the through hole and is arranged in the soundproof cover.

[0019] Furthermore, the two driving cylinders are connected to a pneumatic valve, and the pneumatic valve is connected to a solenoid valve to control start and stop.

[0020] The working principle of this utility model is:

[0021] (1) In the initial state, the upper die head and the lower die head are in a separated state, and the sound insulation cover is set on the outside of the upper die head and located above the lower die head;

[0022] (2) Place the workpiece to be processed on the lower die head;

[0023] (3) Control the driving cylinder to start and push the soundproof cover downward along the upper die head until the bottom of the soundproof cover is pressed against the lower sealing structure;

[0024] (4) The main cylinder of the ultrasonic welding machine drives the upper die head to move downward until it is pressed on the workpiece for processing. At this time, the processing area of ​​the workpiece is sealed in the soundproof cover;

[0025] (5) When the workpiece is being processed, the exhaust valve introduces the exhaust gas generated during the cylinder driving process into the soundproof cover through a hose to cool the processing area;

[0026] (6) After the processing is completed, the driving cylinder and the main cylinder are controlled to move the sound insulation cover and the upper die head upward in turn to remove the workpiece.

[0027] In summary, the present invention has the following beneficial effects:

[0028] (1) During processing, the utility model forms a sealed chamber by combining the sound insulation cover, the upper sealing structure, and the lower sealing structure, which can eliminate the noise during workpiece processing to the greatest extent and reduce the harm to the operator.

[0029] (2) The utility model connects the exhaust valve of the cylinder with the inside of the soundproof cover through a hose, which, on the one hand, serves the purpose of exhausting and silencing the exhaust gas, and on the other hand, the exhaust gas can cool the upper die head in the soundproof cover, thereby improving the processing quality of the workpiece.

[0030] (3) The soundproof cover of the utility model rises and falls before the ultrasonic die head, so as to achieve the purpose of sound insulation without affecting the operation.

[0031] (4) The solenoid valve of the present invention opens or closes after receiving an electrical signal, controls the on / off of the air pressure valve, thereby adjusting the gas pressure entering the cylinder, realizing the extension or retraction of the cylinder, thereby controlling the operation of the drive cylinder and realizing the automatic control of the cylinder operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of the utility model;

[0033] Figure 2 This is a cross-sectional view of the utility model in its initial state;

[0034] Figure 3 This is a cross-sectional view of the utility model in working state;

[0035] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0036] Reference numerals:

[0037] Base 101, machine head 102, main cylinder 103, vibration assembly 104, upper die head 105, lower die head 106, transducer 107, amplitude transformer 108, assembly seat 109, sound insulation cover 201, adjustable driving mechanism 202, upper sealing structure 203, lower sealing structure 204, through hole 2011, exhaust hose 2012, driving cylinder 2021, long angle code 2022, mounting plate 2023, outer sealing mechanism 2031, inner sealing mechanism 2032, positioning ring 2033, workpiece 301. DETAILED DESCRIPTION

[0038] refer to Figures 1 to 4 The present embodiment describes a noise reduction device for an ultrasonic welding machine. The ultrasonic welding machine includes a base 101 and a head 102 fixed above the base. A main cylinder 103 is provided in the head. The push rod of the main cylinder is connected to the top of a vibration component 104. The vibration component 104 includes an assembly seat 109. A transducer 107 and a horn 108 are provided in the assembly seat. The horn is connected to an upper die head 105. A lower die head 106 corresponding to the upper die head is provided on the base.

[0039] The noise reduction device includes a soundproof cover 201, an adjustable driving mechanism 202, an upper sealing structure 203 and a lower sealing structure 204;

[0040] The soundproof cover is partially sleeved on the outside of the upper die head, and the soundproof cover is fixed to the die head through an adjustable driving mechanism, so that the soundproof cover can move up and down relative to the upper die head;

[0041] The lower sealing structure is arranged on the base, and the lower sealing structure is arranged corresponding to the bottom of the sound insulation cover;

[0042] The upper sealing structure is arranged on the top of the sound insulation cover.

[0043] The adjustable driving mechanism includes a mounting plate and two driving cylinders 2021. The two driving cylinders are symmetrically fixed on the two side walls of the machine head through long angle brackets 2022. The push rods of the two driving cylinders are fixedly connected to the mounting plate 2023 respectively. The sound insulation cover is fixed to the bottom of the mounting plate. The sound insulation cover and the mounting plate are respectively provided with a first through-channel.

[0044] The lower sealing structure is a sound insulation material with thickness, and the sound-absorbing cotton.

[0045] The upper sealing structure includes an inner sealing mechanism or an outer sealing mechanism 2031 and an inner sealing mechanism 2032 .

[0046] The inner sealing mechanism is a rubber sealing ring with a labyrinth sealing structure. The rubber sealing ring is fixed in the first channel with an interference fit. The rubber sealing ring is pressed onto the outside of the upper die head portion passing through the sound insulation cover. The outer ring of the rubber sealing ring is provided with a positioning ring 2033, which is fixed on the mounting plate. The positioning ring is fixed by bonding or fastener connection.

[0047] The outer sealing mechanism is an elastic rubber sealing barrel structure, the top of the elastic rubber sealing barrel is fixed to the bottom of the assembly seat, and the bottom of the elastic rubber sealing barrel is fixed to the top of the mounting plate, so that a sealed cavity is formed in the elastic rubber sealing barrel.

[0048] A layer of sound-absorbing cotton is fixedly arranged on the inner wall of the soundproof cover.

[0049] The soundproof cover is provided with a through hole 2011, and the exhaust valve of the driving cylinder is connected to an exhaust hose 2012. The air outlet end of the exhaust hose passes through the through hole and is arranged in the soundproof cover.

[0050] The two driving cylinders are connected to a pneumatic valve, and the pneumatic valve is connected to a solenoid valve to control the start and stop.

[0051] The working principle of this utility model is:

[0052] (1) In the initial state, the upper die head and the lower die head are in a separated state, and the sound insulation cover is set on the outside of the upper die head and located above the lower die head;

[0053] (2) placing the workpiece 301 to be processed on the lower die head;

[0054] (3) Control the driving cylinder to start and push the soundproof cover downward along the upper die head until the bottom of the soundproof cover is pressed against the lower sealing structure;

[0055] (4) The main cylinder of the ultrasonic welding machine drives the upper die head to move downward until it is pressed on the workpiece for processing. At this time, the processing area of ​​the workpiece is sealed in the soundproof cover;

[0056] (5) When the workpiece is being processed, the exhaust valve introduces the exhaust gas generated during the cylinder driving process into the soundproof cover through a hose to cool the processing area;

[0057] (6) After the processing is completed, the driving cylinder and the main cylinder are controlled to move the sound insulation cover and the upper die head upward in turn to remove the workpiece.

Claims

1. A noise reduction device for an ultrasonic welding machine, the ultrasonic welding machine comprising a base (101) and a head (102) fixed above the base (101), a main cylinder (103) being provided in the head (102), a push rod of the main cylinder (103) being connected to the top of a vibration component (104), a bottom end of the vibration component (104) being connected to an upper die head (105), a lower die head (106) corresponding to the upper die head (105) being provided on the base (101), characterized in that: The noise reduction device comprises a soundproof cover (201), an adjustable driving mechanism (202), an upper sealing structure (203) and a lower sealing structure (204); The soundproof cover (201) is partially sleeved on the outside of the upper die head (105), and the soundproof cover (201) is fixed to the die head (102) through an adjustable driving mechanism (202), so that the soundproof cover (201) can move up and down relative to the upper die head (105); The lower sealing structure (204) is arranged on the base (101), and the lower sealing structure (204) is arranged corresponding to the bottom of the soundproof cover (201); The upper sealing structure (203) is arranged on the top of the sound insulation cover (201).

2. The noise reduction device for an ultrasonic welding machine according to claim 1, characterized in that: The adjustable driving mechanism (202) comprises a mounting plate (2023) and two driving cylinders (2021); the two driving cylinders (2021) are symmetrically fixed to the two side walls of the machine head (102) through long angle brackets (2022); the push rods of the two driving cylinders (2021) are fixedly connected to the mounting plate (2023); the soundproof cover (201) is fixed to the bottom of the mounting plate (2023); and the soundproof cover (201) and the mounting plate (2023) are respectively provided with a first passage passing therethrough.

3. The noise reduction device for an ultrasonic welding machine according to claim 1, characterized in that: The lower sealing structure (204) is a sound insulation material having thickness, and the sound insulation material is a combination of one or more of a sound insulation pad, a sound insulation felt, a sound absorbing cotton, and a polyester fiber sound absorbing board.

4. The noise reduction device for an ultrasonic welding machine according to claim 2, characterized in that: The upper sealing structure (203) includes an inner sealing mechanism (2032) or an outer sealing mechanism (2031) or a combination of the inner sealing mechanism (2032) and the outer sealing mechanism (2031).

5. The noise reduction device for an ultrasonic welding machine according to claim 4, characterized in that: The inner sealing mechanism (2032) is a rubber sealing ring, which is fixed in the first channel with an interference fit, and is pressed onto the outside of the upper die head (105) portion passing through the soundproof cover (201). The outer ring of the rubber sealing ring is provided with a positioning ring (2033), and the positioning ring (2033) is fixed on the mounting plate (2023). The positioning ring (2033) is fixed by bonding or fastener connection.

6. The noise reduction device for an ultrasonic welding machine according to claim 5, characterized in that: The rubber sealing ring adopts a labyrinth sealing structure.

7. A noise reduction device for an ultrasonic welding machine according to claim 4, 5 or 6, characterized in that: The outer sealing mechanism (2031) is an elastic rubber sealing barrel structure, the top of the elastic rubber sealing barrel is fixed on the vibration component (104), and the bottom of the elastic rubber sealing barrel is fixed on the mounting plate (2023), so that a sealed cavity is formed in the elastic rubber sealing barrel.

8. The noise reduction device for an ultrasonic welding machine according to claim 7, characterized in that: A layer of sound-absorbing cotton is fixedly provided on the inner wall of the soundproof cover (201).

9. The noise reduction device for an ultrasonic welding machine according to claim 7, characterized in that: The soundproof cover (201) is provided with a through hole (2011), the exhaust valve of the driving cylinder (2021) is connected to an exhaust hose (2012), and the air outlet end of the exhaust hose (2012) passes through the through hole (2011) and is arranged in the soundproof cover (201).

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