Ultrasonic welding machine head capable of being accurately lifted

Abstract

The utility model relates to an ultrasonic welding machine head capable of lifting accurately. The ultrasonic welding machine head comprises a machine shell, a lifting shell, a lifting air cylinder, a positioning mechanism and a reset sensing mechanism. The lifting shell is connected into the machine shell through a piston rod of the lifting air cylinder. The positioning mechanism comprises a position adjusting head, a screw rod and a positioning piece; the reset sensing mechanism comprises a photoelectric sensor and a sensing rod; the lifting device has the advantages that positioning of the descending position of the lifting shell is achieved through the screw and the positioning block, positioning is easy and convenient, and manufacturing cost is low; and (2) the reset sensing mechanism can monitor whether the lifting shell ascends and returns in real time, so that an operator can find abnormities in time conveniently, accurate reset of the ultrasonic welding head is ensured, and the situation that reset of the ultrasonic welding head is affected due to errors of the retraction stroke of the telescopic rod of the air cylinder is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic welding equipment, in particular to an ultrasonic welding head with precise lifting and lowering. Background Art

[0002] Ultrasonic welding is a method used to assemble thermoplastic plastic parts and some composite components. The energy generated by the ultrasonic generator is used to rapidly expand and contract the transducer under the induction of the ultra-high frequency magnetic field to produce elastic vibration, thereby forming a weld.

[0003] On the production line, workpieces of different batches and thicknesses are often replaced continuously, which requires the transducer and the ultrasonic welding head to move up and down to adapt to the welding of workpieces of different thicknesses. Generally, the ultrasonic welding head is quickly raised and lowered by a cylinder. However, since the telescopic stroke of the telescopic rod of an ordinary cylinder is fixed, the cylinder stroke needs to be adjusted every time the ultrasonic welding head is adjusted to a certain distance, which makes debugging cumbersome. In addition, the stroke adjustment range of the cylinder is limited, and it is impossible to flexibly and accurately adjust the descending position of the ultrasonic welding head. Utility Model Content

[0004] The utility model aims to provide an ultrasonic welding machine head with accurate lifting, which can realize the lifting of ultrasonic welding flexibly, quickly and accurately.

[0005] In order to achieve the above-mentioned utility model object, the utility model provides a precise lifting ultrasonic welding head, including a casing, a lifting shell, a lifting cylinder, a positioning mechanism, and a reset sensing mechanism;

[0006] The cylinder body of the lifting cylinder is vertically connected to the top of the casing, and the lifting shell is connected inside the casing through the piston rod of the lifting cylinder;

[0007] The positioning mechanism comprises an adjustment head, a screw rod, and a positioning member; the adjustment head and the positioning member are both located at the top of the housing, the adjustment head is provided with a positioning slot, the positioning member is threadedly connected with a positioning rod, and the end of the positioning rod faces the positioning slot; the adjustment head is threadedly connected with the screw rod, the bottom of the screw rod vertically extends into the housing, and a block is provided at the bottom of the screw rod; a limiting member is provided at the top of the lifting housing, a through hole is provided at the top of the limiting member, the screw rod passes through the through hole, and the block is located in the limiting member;

[0008] The reset sensing mechanism comprises a photoelectric sensor and a sensing rod; the photoelectric sensor is connected to the side wall of the housing, the sensing rod is connected to the top of the lifting shell, and the position of the sensing rod is matched with the position of the photoelectric sensor.

[0009] Preferably, a connecting cavity is provided at the bottom of the lifting shell, and the two ends of the connecting cavity are respectively connected to a transducer clamp and a transducer clamp. The connecting hole of the transducer clamp is coaxially arranged with the clamping slot of the transducer clamp, and a fastening hole is provided on the side of the transducer clamp, and the clamping slot is semicircular.

[0010] Furthermore, a protective plate is provided on the outer side of the transducer clamp.

[0011] As a further improvement of the utility model, a pressure sensor is provided between the lifting cylinder and the lifting shell.

[0012] As a further improvement of the utility model, a guide rail assembly is vertically provided on the side wall of the casing, and the lifting shell is connected to the casing through the guide rail assembly.

[0013] As a further improvement of the utility model, the positioning piece is provided with a buckle, the positioning head is provided with a slide groove, and the buckle is snapped into the slide groove.

[0014] As a further improvement of the utility model, a magnetic scale reading head is provided on the side wall of the casing, and a magnetic scale is vertically connected to the lifting shell, and the magnetic scale reading head is adapted to the position of the magnetic scale.

[0015] As a further improvement of the utility model, dustproof plates are provided at both ends of the shell.

[0016] The utility model is a precision lifting ultrasonic welding machine head, in which an ultrasonic transducer and an ultrasonic welding head are assembled in a lifting shell. According to the workpieces of different thicknesses, the lifting shell descends as the telescopic rod of the lifting cylinder is extended, and the positioning mechanism adjusts the height position of the card block, thereby positioning the final descending position of the lifting shell. When the lifting shell needs to be lifted and reset, the reset sensing mechanism monitors the lifting position of the lifting shell in real time to ensure the accurate reset of the ultrasonic welding head.

[0017] Compared with the prior art, the utility model has the following advantages for a precisely lifted ultrasonic welding machine head:

[0018] (1) The positioning mechanism can accurately locate the descending stroke of the lifting shell, and the descending position of the lifting shell is located through the screw and the positioning block, which is easy to adjust and has low manufacturing cost;

[0019] (2) The reset sensing mechanism can monitor in real time whether the lifting shell has risen to its original position, so that the operator can find abnormalities in time and ensure the accurate reset of the ultrasonic welding head, avoiding the error of the cylinder telescopic rod retraction stroke affecting the reset of the ultrasonic welding head. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a schematic diagram of the structure of an ultrasonic welding machine head with precise lifting and lowering according to the utility model;

[0021] Figure 2 It is a schematic diagram of the lifting shell structure;

[0022] Figure 3 This is a schematic diagram of the pressure sensor connection;

[0023] Figure 4 It is a schematic diagram of the positioning mechanism structure;

[0024] Figure 5 It is a schematic diagram of the positioning mechanism structure;

[0025] Figure 6 It is a schematic diagram of the reset sensing mechanism structure;

[0026] Figure 7 This is a schematic diagram of the magnetic scale connection structure. DETAILED DESCRIPTION

[0027] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, a precision lifting ultrasonic welding head of the utility model comprises a casing 1, a lifting shell 2, a lifting cylinder 3, a positioning mechanism 4, and a reset sensing mechanism 5;

[0029] The cylinder body of the lifting cylinder 3 is vertically connected to the top of the casing 1, and the lifting housing 2 is connected to the casing 1 through the piston rod of the lifting cylinder 3;

[0030] The lifting housing 2 is used to fix the ultrasonic transducer. Figure 2 As shown, a connecting cavity 21 is provided at the bottom of the lifting shell 2, and the two ends of the connecting cavity 21 are respectively connected to a transducer clamp 22 and a transducer clamp 23, the connecting hole 221 of the transducer clamp 22 and the clamping groove 231 of the transducer clamp 23 are coaxially arranged, and a fastening hole 222 is provided on the side of the transducer clamp 22, and the clamping groove 231 is semicircular.

[0031] One end of the ultrasonic transducer is inserted into the connecting hole 221, and the entire ultrasonic transducer is wrapped in the connecting cavity 21. The transducer clamp 22 is fastened by the fastening hole 222 and the fastener, and then the other end is inserted into the slot 231. This structure of the lifting shell 2 can facilitate the disassembly and assembly of the ultrasonic transducer, and has a strong fastening degree for the ultrasonic transducer, thereby avoiding the loosening of the ultrasonic transducer due to the shaking of the lifting shell 2 during the lifting of the lifting shell 2 or during the welding process, thereby affecting the welding quality. Among them, the semicircular arc slot 231 facilitates the assembly of the ultrasonic transducer and the ultrasonic welding head.

[0032] A protective plate 24 is provided on the outer side of the transducer clamp 23. The protective plate 24 strengthens the connection strength of the transducer clamp 23 to the ultrasonic transducer and also protects the ultrasonic transducer during welding.

[0033] A pressure sensor 31 is provided between the lifting cylinder 3 and the lifting shell 2. The lifting shell 2 rises and falls with the extension and retraction of the piston rod of the lifting cylinder 3, thereby adjusting the appropriate welding position according to the workpieces of different thicknesses. The pressure sensor 31 can sense the downward pressure of the piston rod of the lifting cylinder 3, convert the sensed pressure signal into an electrical signal, and transmit it to the terminal. When the pressure of the piston rod of the lifting cylinder 3 on the lifting shell 2 is too large, the operator can discover and repair it in time to avoid the lifting shell 2 from losing control of the descending stroke, damaging the ultrasonic transducer and ultrasonic welding head connected thereto, and causing a production accident.

[0034] A guide rail assembly 8 is vertically provided on the side wall of the housing 1, and the lifting housing 2 is connected to the housing 1 through the guide rail assembly 8. The guide rail assembly 8 can be an existing linear guide rail and slider assembly, and the lifting housing 2 always maintains a straight lifting along the guide rail assembly 8, so as to avoid the ultrasonic welding head being misaligned due to the misalignment of the lifting housing 2 during repeated lifting and lowering, resulting in an error in the welding position.

[0035] like Figure 4-5 As shown, the positioning mechanism 4 includes an adjusting head 41, a screw 42, and a positioning member 43; the adjusting head 41 and the positioning member 43 are both located at the top of the casing 1, the adjusting head 41 is provided with a positioning groove 411, the positioning member 43 is threadedly connected with a positioning rod 44, and the end of the positioning rod 44 faces the positioning groove 411; the adjusting head 41 is threadedly connected with the screw 42, the bottom of the screw 42 vertically extends into the casing 1, and a block 46 is provided at the bottom of the screw 42; a limiting member 45 is provided at the top of the lifting shell 2, and a through hole 451 is provided at the top of the limiting member 45, the screw 42 passes through the through hole 451, and the block 46 is located in the limiting member 45.

[0036] Since the air intake and exhaust volume of the cylinder is difficult to accurately control, the adjustment of the piston rod stroke is difficult to control, and the descending position of the ultrasonic welding head cannot be accurately controlled.

[0037] When the lifting shell 2 is lowered along with the piston rod of the lifting cylinder 3, the limiter 45 at the top of the lifting shell 2 is lowered, and its top will be stuck by the block 46, so that the ultrasonic welding head is stopped. According to the welding position, the adjustment head 41 can be screwed to make the screw 42 threadedly connected thereto rise and fall, thereby adjusting the height of the block 46 at the bottom of the screw 42 to achieve the positioning of the lowered position of the ultrasonic welding head. After the adjustment head 41 is screwed, the positioning rod 44 is rotated, and the end of the positioning rod 44 is stuck in the positioning groove 411 to fix the adjustment head 41 to prevent it from loosening and affecting the height position of the block 46.

[0038] The positioning member 43 is provided with a buckle 431, and the positioning head 41 is provided with a slide groove 41, and the buckle 431 is inserted into the slide groove 41. In the process of screwing the positioning head 41, the slide groove 41 rotates along the buckle 431, and the buckle 431 plays a role in limiting and guiding the rotation of the positioning head 41, ensuring that the positioning head 41 always rotates on the same axis of the screw rod 42, avoiding the misalignment of the positioning head 41, causing the screw rod 42 to deflect in the housing 1, and affecting the smooth adjustment of the screw rod 42. It also avoids the misalignment of the positioning head 41, which causes the positioning groove 411 to be unable to dock with the positioning rod 44.

[0039] like Figure 7 As shown, the side wall of the casing 1 is provided with a magnetic scale reading head 7, and the lifting shell 2 is vertically connected with the magnetic scale 6, and the magnetic scale reading head 7 is adapted to the position of the magnetic scale 6. The magnetic scale 6 rises and falls with the lifting shell 2, and the position of the magnetic scale reading head 7 remains unchanged. The magnetic scale reading head 7 can read the position signal of the magnetic scale 6 and convert its signal into an electrical signal and transmit it to the middle terminal, so that the operator can intuitively measure the descending position of the lifting shell 2. When adjusting the thickness of batch workpieces on the production line, it is convenient to cooperate with the positioning mechanism 4 to adjust the height position of the block 46 according to the thickness of the welding workpiece, so as to quickly debug the descending position of the ultrasonic joint. The measurement method of the magnetic scale 6 makes the descending height position of the lifting shell 2 more accurate, and improves the debugging accuracy of the welding position.

[0040] like Figure 6 As shown, the reset sensing mechanism 5 includes a photoelectric sensor 51 and a sensing rod 52; the photoelectric sensor 51 is connected to the side wall of the housing 1, and the sensing rod 52 is connected to the top of the lifting housing 2, and the position of the sensing rod 52 matches the position of the photoelectric sensor 51. When the sensing rod 52 is located at the sensing position of the photoelectric sensor 51, the sensing position of the photoelectric sensor 51 is shielded, and at this time, the photoelectric sensor 51 converts the optical signal into an electrical signal and transmits it to the terminal, so that the operator can intuitively and timely understand whether the lifting housing 2 is accurately reset.

[0041] Dust-proof plates 41 are provided at both ends of the housing 1 to isolate the dust from the external environment and the pollution generated by the production line operation, thereby preventing the various components inside the housing 1 from being polluted, thereby affecting the lifting accuracy of the ultrasonic welding head.

[0042] The utility model is a precise lifting ultrasonic welding machine head, in which an ultrasonic transducer and an ultrasonic welding head are assembled in a lifting shell 2. According to workpieces of different thicknesses, the lifting shell 2 is lowered as the telescopic rod of the lifting cylinder 3 is extended, and the positioning mechanism 4 adjusts the height position of the card block 46, thereby positioning the final lowered position of the lifting shell 2. When the lifting shell 2 needs to be lifted and reset, the reset sensing mechanism 5 monitors the lifting position of the lifting shell 2 in real time to ensure the accurate reset of the ultrasonic welding head.

[0043] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all within the scope defined by the claims of this application.

Claims

1. A precise lifting ultrasonic welding head, characterized in that: It includes a casing, a lifting shell, a lifting cylinder, a positioning mechanism, and a reset sensing mechanism; The cylinder body of the lifting cylinder is vertically connected to the top of the casing, and the lifting shell is connected inside the casing through the piston rod of the lifting cylinder; The positioning mechanism comprises an adjustment head, a screw rod, and a positioning member; the adjustment head and the positioning member are both located at the top of the housing, the adjustment head is provided with a positioning slot, the positioning member is threadedly connected with a positioning rod, and the end of the positioning rod faces the positioning slot; the adjustment head is threadedly connected with the screw rod, the bottom of the screw rod vertically extends into the housing, and a block is provided at the bottom of the screw rod; a limiting member is provided at the top of the lifting housing, a through hole is provided at the top of the limiting member, the screw rod passes through the through hole, and the block is located in the limiting member; The reset sensing mechanism comprises a photoelectric sensor and a sensing rod; the photoelectric sensor is connected to the side wall of the housing, the sensing rod is connected to the top of the lifting shell, and the position of the sensing rod is matched with the position of the photoelectric sensor.

2. The precise lifting ultrasonic welding head according to claim 1, characterized in that: A connecting cavity is provided at the bottom of the lifting shell, and the two ends of the connecting cavity are respectively connected to a transducer clamp and a transducer clamp. The connecting hole of the transducer clamp is coaxially arranged with the clamping slot of the transducer clamp. A fastening hole is provided on the side of the transducer clamp, and the clamping slot is semicircular.

3. The ultrasonic welding head with precise lifting as claimed in claim 2, characterized in that: A protective plate is arranged on the outer side of the transducer clamp.

4. The ultrasonic welding head with precise lifting as claimed in claim 1, characterized in that: A pressure sensor is provided between the lifting cylinder and the lifting shell.

5. The precise lifting ultrasonic welding head according to claim 1, characterized in that: A guide rail assembly is vertically arranged on the side wall of the casing, and the lifting shell is connected to the casing through the guide rail assembly.

6. The ultrasonic welding head with precise lifting as claimed in claim 1, characterized in that: The positioning piece is provided with a buckle, the positioning head is provided with a slide groove, and the buckle is snapped into the slide groove.

7. The ultrasonic welding head with precise lifting as claimed in claim 1, characterized in that: A magnetic scale reading head is provided on the side wall of the casing, and a magnetic scale is vertically connected to the lifting shell, and the magnetic scale reading head is adapted to the position of the magnetic scale.

8. The ultrasonic welding head with precise lifting as claimed in claim 1, characterized in that: Dust-proof plates are provided at both ends of the shell.

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