KR100949401B1 - Clamp apparatus with compressed gas and coating system comprising the same - Google Patents

Abstract

PURPOSE: A gas clamping apparatus and a coating system including the same are provided to prevent mechanical fatigue by employing a gas spring using the elastic force of compressed gas. CONSTITUTION: A gas clamping apparatus(100) comprises a rotary main shaft(10), upper and lower plates(20,30), a pressing unit(40), and a clamping unit(50). The upper plate is inserted into the main shaft and moves in the axial direction. The leading end of the main shaft is connected to one side of the lower plate and a basket(60) is fixed to the other side of the lower plate. The pressing unit forces the upper plate to move axially. The clamping unit includes a gas spring(51) and clamps or releases a basket by interlocking with the upper plate.

Description

Gas clamping device and coating system comprising same {Clamp apparatus with compressed gas and coating system comprising the same}

The present invention relates to a gas clamping device and a coating system including the same, and more particularly, to a gas clamping device including a tightening unit having a gas spring and a coating system for surface treatment of an automotive part including the same.

In general, various bolt nuts, which are press products used in automobile parts and industrial machine parts, are subjected to surface treatment (water soluble, organic solvent zinc powder coating or chromate coating).

Conventionally, the tightening driving force of the clamping device, which is an important facility for the surface treatment process, uses the elasticity of the mechanical spring, but a problem arises in that the restraint of the basket tightening (clamping) device is reduced due to the fatigue of the spring due to repetitive work. Due to this, there is a problem that the clamping device is broken or the life is shortened, and because the restraint force of each spring is uneven, it is difficult to maintain the controllability according to the weight of the basket. Furthermore, a problem has been raised about the safety of the basket turning or leaving during the process of rotating the basket and releasing the coating liquid.

One object of the present invention for solving the problems of the prior art described above is to provide a clamping device and a coating system including the same for preventing the basket from being separated during high-speed rotation and vertical movement of the basket in the coating system.

One aspect of the present invention for achieving the above object is

Rotatable main shaft; An upper plate of a disk shape inserted into the main shaft to perform an axial movement; A lower plate having one end coupled to the main shaft and a basket fastened to the other side; A pressing unit which moves the upper plate to move in the axial direction; And a tightening portion having a gas spring and interlocked with the axial movement of the upper plate to fasten or release the basket.

In another aspect the invention relates to a coating system comprising the gas clamping device.

Gas clamping device according to the present invention by using a gas spring using the elastic force of the compressed gas instead of the mechanical elastic force of the spring, there is no occurrence of mechanical fatigue phenomenon, such as occurs in the mechanical spring, and also reduce the problems of vibration or separation during rotation You can. Therefore, the gas clamp device and the coating system using the same according to the present invention have an excellent effect on safety as well as economics.

Gas clamp according to an embodiment of the present invention is characterized in that it comprises a gas spring.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view of a basket fastened to a gas claim device according to an embodiment of the present invention, Figure 2 is a front view showing that the basket is separated from the gas claim device of FIG. 3 is a front view of a gas claim device according to another embodiment of the present invention.

1 to 3, the gas claim 100 device of the present invention includes a main shaft 10, an upper plate 20, a lower plate 30, a pressing unit 40, and a fastening unit 50, 50 ′. ), The tightening part (50, 50 ') is provided with gas springs (51, 51') to clamp the basket (60) with its elastic force.

When the upper plate 20 is squeezed along the axial direction by the pressing portion 40, the device releases the basket, and the force of the pressing portion 40 is removed. The fastening parts 50 and 50 'may fasten the basket by moving the upper plate 20 by the elastic force of the gas springs 51 and 51'.

The main shaft 10 is rotatable, and the spindle unit 70 is further provided on the upper end of the main shaft to rotate the main shaft 10.

The upper plate 20 is coaxial with the main shaft 10 and has a disk shape with a central portion thereof. The main shaft is inserted into the central portion of the upper plate through which the upper plate may move in the axial direction along the main shaft.

The lower plate 30 is coupled to the front end of the main shaft 10 on one surface thereof, the basket 60 is fastened to the other surface.

Preferably, the main shaft 10 and the lower plate 30 are bonded to each other. The lower plate may be rotated together with the main shaft.

The upper plate 20 may be axially compressed along the main shaft by the pressing unit 40 and may be moved by an elastic force of the gas spring 51.

The pressurization portion 40 is sufficient if the structure or device supported by the expansion force of the gas spring is not necessarily limited to a particular facility. For example, the pressurizing part 40 may be a hydraulic device including a driving motor and a hydraulic cylinder.

1 to 3 as a more specific embodiment of the pressing portion 40, the pressing portion 40 includes a movable portion 41 and the acting portion 42. The movable part 41 may transmit hydraulic pressure to the acting part 42 using a hydraulic cylinder.

The acting portion 42 has a structure in which a central portion is perforated, and the main shaft is inserted into the central portion so that the acting portion 42 may move along the main shaft.

One end of the movable portion 41 is coupled to the side of the acting portion 42, and the upper plate 20 is coupled to the lower end surface of the acting portion 42. Therefore, the hydraulic part of the movable part 41 can move the upper plate in the axial direction.

The fastening part 50 is interlocked with the axial movement of the upper plate 20 to fasten or detach the basket 60.

The tightening part 50 has a gas spring 51.

The gas spring 51 may use a known gas spring. In general, the gas spring 51 may include a pressure tube 511, a piston (not shown), and a piston rod 512. The gas spring 51 is filled with a compressed gas, the piston rod has an elastic force is pushed in accordance with the compression force of the compressed gas.

The compressed gas may be inert gas such as nitrogen or carbon dioxide, or air. The pressure of the compressed gas is sufficient to fix the basket filled inside the coated component, and preferably maintains the pressure enough to secure the basket even when the basket is rotated or tilted. Good to do.

As an embodiment of the tightening unit 50, referring to FIGS. 1 and 2, the tightening unit 50 may include a gas spring 51, a locking unit 52, and an inclined guide 53. . The locking portion 52 is coupled to one end of the piston rod 512 of the gas spring to fasten the basket by linear movement along the inclined guide 53 in accordance with the compression and expansion of the piston rod.

The upper portion of the inclined guide 53 is in contact with the upper plate 20. The locking portion 52 is the inclined guide 53 in accordance with the axial movement of the bite portion 521 tightening the basket, the support portion 522 for supporting and fixing the bite portion 521 and the upper plate 20. And a moving roller 523.

The tightening unit 50 may further include an auxiliary spring 54 for connecting and fixing the upper plate and the lower plate.

The upper plate 20 may rotate together with the lower plate 30 by the auxiliary spring 54.

Referring to FIG. 3 as another embodiment of the present invention, the tightening portion 50 'includes a gas spring 51' and a locking portion 52 '.

The gas spring 51 ′ connects and fixes the upper plate 20 and the lower plate 30, and applies an elastic force to the upper plate.

The locking portion 52 'includes a bite portion 521' for tightening a basket, and a pin 522 'for fixing and pivoting the bite portion 521'. The bite portion 521 ′ has a spring 523 ′ at one end thereof to interlock when the upper plate 20 moves axially to pivot the pin about an axis to fasten or detach the basket.

4 is a schematic top view showing the arrangement of the gas spring 51 'and the locking portion 52' in the embodiment shown in FIG. Referring to FIG. 4, six gas springs 51 ′ are disposed along the circumference of the upper plate 20, and a locking portion 52 ′ is installed therebetween. The gas springs (51, 51 ') is preferably provided with 2 to 8, but can be appropriately selected not only the number of installation, but also the filling pressure and diameter of the gas according to the capacity and weight to be treated.

The device may further comprise a spindle portion 60 for rotating the main shaft.

1 to 3, the spindle unit 70 may include a frame motor 71 and a power transmission unit 72 on the main shaft 10. It is preferable that the frame motor 71 uses a vector motor or a servo motor having a constant torque regardless of the rotational speed change amount, and the power transmission unit 72 uses a V belt.

Since the spindle unit 70 rotates the basket at a high speed forward and reverse, it may serve to maintain the smoothness of the drug attached to the surface tension by releasing the filtrate of the coating attached to the product surface.

The gas claim device 100 may further include a tilting unit 80. 5A and 5B show a tilting part for tilting and rotating the clamping device. 5A and 5B, the tilting part may rotate the basket by tilting the basket in a range of 15 to 60 ° with a vertical axis when the basket is rotated by the spindle unit. Therefore, the product in the basket can be more uniformly liquid contact by the tilting portion. The tilting part includes a hydraulic cylinder to overcome vibrations and loads generated at high speed. In addition, the tilting unit may automatically adjust the angle by inputting a required angle to the computer by applying an encoder.

The gas clamping device according to the present invention has a structure in which the tightening part is separated from the basket by hydraulic pressure, and on the contrary, when the hydraulic pressure is removed, the tightening part fastens the basket by using the elastic force of the gas spring. Therefore, there is no mechanical fatigue of the spring at all because it does not use the elastic force of the existing mechanical spring, it can also reduce the problems of vibration or separation during rotation. Therefore, the gas clamp device according to the present invention has an excellent effect not only in safety but also in economy.

The gas clamping device can be used in machinery or apparatus that requires a high degree of stability and precision. The gas clamping device may be used in a facility in which a conventional clamping device is used, such as a conveying machine or a surface treatment pretreatment process. Preferably, zinc powder coating, zinc nickel plating may be used in the after-treatment process, chromate process, sealing process, immersion coating and the like.

In another aspect, the present invention relates to a coating system (apparatus) comprising the gas clamping apparatus.

6 is a schematic view showing a coating system according to an embodiment of the present invention. Referring to FIG. 6, the coating system 1000 includes the gas clamping device 100, a basket 60 fastened to the gas clamping device, a transfer part 200 for transferring and mounting the basket to the gas clamping device. And a lift part 300 which moves the coating liquid container up and down to deposit and desorb parts inside the basket.

The transfer unit 200 has a function of transferring the basket to the gas clamping device and mounting it, and the motor for the transfer may be horizontally moved along the table by driving the pinion gear on the rack. The motor can be equipped with a brake to maintain the exact position function, and to maintain accurate position control and durability.

The transfer unit 200 is installed in the inner center of the hydraulic pneumatic thin cylinder can be moved up and down can be in close contact with the upper flange of the basket on the lower plate. The stroke can be in the range 50-200 mm.

The lift unit 300 serves to raise and lower the container containing the coating liquid to deposit and desorb the coated product in the basket. The lift unit may include, but is not necessarily limited to, a driving unit 310, a rail 320 and a straight bearing 330, a container 340, and a saddle 350.

For example, the driving unit 310 may mount the helical gear box and the motor and lower or lower the container 340 using a chain gear for low noise.

The container saddle 350 is easy to detach and attach to facilitate the replacement of the drug contained in the container and preferably has durability against vibration.

The container 340 is composed of a triple, the coating liquid, cold water, coolant is filled between each layer, the material of the container is preferably stainless steel, the cold water flowing from the freezer by placing a cold water jacket between the stainless steel is uniformly coated liquid The temperature of can be maintained efficiently.

The coolant filled in the container can block heat transfer to minimize external cooling load, and also suppress the generation of condensed water caused by the temperature difference of air.

The lift 200 is moved up and down by the upper drive unit 31 and the container mounted on the lift goes through the process of depositing and de-liquing the basket 60 when the lift is lifted up and the basket is detached when the lift is lowered.

Conventionally, a wheel or a simple roller was mounted on a vertical rail as a lift. The coating system generates a lot of vibration due to mechanical characteristics, and the vibration continuously generates fine collision of wheels or rollers with many gaps and rails. This further increases vibrations throughout the system, causing loosening of the joints with the components, which can cause malfunctions.

The lift part employs a roller and a linear bearing 330 (generally called an LM bearing) instead of a wheel.

In the coating system according to one embodiment of the present invention, a hydraulic apparatus may be used. As described above, a hydraulic cylinder may be used in the pressing unit 40, the tilting unit 80, and the transfer unit 200, respectively, and there is no particular limitation on the equipment for driving the cylinder. As an example, the driving equipment may include a cooling device for hydraulic oil, a hydraulic pump, a hydraulic line (rubber hose), a check ball valve for maintaining pressure, a control ball valve, a hydraulic oil tank, and the like.

In the above, although the preferred embodiment of the present invention has been described in detail, these are for illustrative purposes only, and the scope of protection of the present invention is not limited thereto.

1 is a front view of a basket fastened to a gas claim device according to an embodiment of the present invention.

2 is a front view showing that the basket is removed from the gas claim device of FIG.

3 is a front view of a gas claim device according to another embodiment of the present invention.

4 is a schematic top view showing the arrangement of the gas spring 54 'and the locking portion 52' in the embodiment shown in FIG.

5A and 5B are schematic views showing a tilting part for tilting and rotating the clamping device.

6 is a schematic view showing a coating system according to an embodiment of the present invention.

[Description of main part of drawing]

100: gas clamping device

10: main shaft 20: upper plate 30: lower plate

40: press part 50: tightening part 60: basket

70: spindle part

1000: Coating System

200: transfer part 300: lifting part

Claims (9)

Rotatable main shaft; An upper plate of a disc shape inserted into the main shaft to perform an axial movement; A lower plate having one end coupled to the main shaft and a basket fastened to the other side; A pressing unit for moving in the axial direction by applying a force to the upper plate; And Gas clamping device having a gas spring, including a tightening unit for engaging or releasing the basket in conjunction with the axial movement of the upper plate. According to claim 1, wherein the device is pressed by the pressing portion in the axial direction when the upper plate is squeezed out of the basket, and when the force of the pressing portion is removed the movement of the upper plate by the elastic force of the gas spring Gas clamping device, characterized in that for fastening the fastening portion to the basket. The method of claim 1, wherein the tightening portion comprises a gas spring, the inclined guide and the locking portion, wherein the locking portion is coupled to the end of the gas spring to move along the inclined guide by the elastic force of the gas spring to fasten the basket Gas clamping device, characterized in that. The gas clamping device of claim 3, wherein the tightening part further comprises an auxiliary spring for connecting and fixing the upper plate and the lower plate. The gas spring of claim 1, wherein the fastening part connects and fixes the upper plate and the lower plate, and applies an elastic force to the upper plate. Gas clamping device comprising a locking portion for fastening the basket when the upper plate is moved by the elastic force of the gas spring. 6. The locking device according to claim 5, wherein the locking portion includes a bite for tightening a basket, a pin for fixing and pivoting the bite, and a spring connected to one end of the bite, wherein the bite is axially moved when the upper plate is axially moved. Gas clamping device, characterized in that for turning or locking the basket. The gas clamping device according to claim 1, wherein the device further comprises a spindle portion for rotating the basket. A coating system comprising a gas clamping device according to any one of the preceding claims. 9. The coating system according to claim 8, wherein the coating system includes a lift part for moving the coating liquid container up and down to deposit and desorb parts in the basket, and the lift part includes a linear bearing for reducing vibration.

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