PET chair seat water cutting clamp

Abstract

The utility model discloses a kind of PET chair seat water cutting clamps, first through hole of being connected with external air pump is provided on base, supporting column is oppositely set on base, the first installation part and second installation part of mounting seat are connected and fixed with supporting column, the connecting portion of mounting seat is provided with the second through hole coaxial alignment with first through hole, it is provided with several air extraction holes on its first installation part and second installation part connecting surface, suction base is connected and fixed on mounting seat, suction base is surrounded with air cavity between first installation part and second installation part, suction base is equipped with suction hole, in air cavity, suction hole, air extraction hole and second through hole form gas passage, open external air pump, suction hole is adsorbed PET chair seat placed on suction base by first through hole from gas passage suctioning air.The utility model reduces adsorption pipeline design under the condition that guaranteeing that adsorption force is evenly distributed in suction hole, without again physical clamping to PET chair seat in use process, reduce workpiece clamping time.

Description

Technical Field

[0001] This utility model relates to the field of waterjet cutting fixture technology, and in particular to a waterjet cutting fixture for a PET chair seat. Background Technology

[0002] PET chair seats are three-dimensional irregular curved surfaces, making it difficult for traditional planar fixtures to achieve uniform fit. This results in uneven distribution of adsorption force, causing burrs or material deformation on the cut surface. Moreover, traditional fixtures rely on mechanical clamping, which can easily cause displacement or deformation of the PET chair seat during high-speed waterjet cutting, affecting processing accuracy. To address this issue, existing technologies have adopted vacuum adsorption fixtures. However, existing vacuum adsorption fixtures either have a simple air path design that results in uneven local adsorption force, easily causing stress concentration, or have a complex air path design that reduces the fixture assembly speed and the stability of adsorption on the PET chair seat. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a fixture with a simple air path that improves the stability of the fixture and PET chair during waterjet cutting.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A waterjet cutting fixture for PET chair seats, comprising:

[0006] The base is connected to the water jet cutting device, and the base is provided with a first through hole for connecting an external air pump;

[0007] Support columns, there are two support columns, which are arranged opposite to each other on the base;

[0008] The mounting base includes a first mounting part, a second mounting part, and a connecting part connecting the first mounting part and the second mounting part. The bottom surfaces of the first mounting part and the second mounting part are respectively connected and fixed to a support column. The connecting part is connected to the base. The connecting part is provided with a second through hole that is coaxially aligned with the first through hole. A plurality of air extraction holes are provided on the connecting surface of the connecting part and the first mounting part and the second mounting part. The air extraction holes are connected to the second through hole.

[0009] An adsorption seat is connected and fixed to the mounting base. The adsorption seat fits against the edge of the mounting base. An air cavity is provided between the adsorption seat and the first and second mounting parts. Adsorption holes are evenly distributed on the adsorption seat corresponding to the positions of the air cavity. In the air cavity, the adsorption holes, the air extraction holes, and the second through hole form a gas channel. When an external air pump is turned on, air is drawn from the gas channel through the first through hole, causing the adsorption holes to adsorb the PET chair seat placed on the adsorption seat.

[0010] In a preferred embodiment, the air cavity includes a first groove and a second groove. The first groove is disposed on the surface of the first mounting part and the second mounting part facing the adsorption seat, and the second groove is disposed on the surface of the adsorption seat facing the first mounting part and the second mounting part. After the adsorption seat is connected and fixed on the mounting seat, the first groove and the second groove form the air cavity.

[0011] In a preferred embodiment, the shape of the adsorption seat is consistent with that of the PET chair seat, and the edge of the adsorption seat is provided with an upward arc-shaped step, and the back edge of the PET chair seat is in contact with the arc-shaped step.

[0012] In a preferred embodiment, a positioning hole is provided on the edge of the adsorption seat, and the positioning hole is used for positioning and connecting with the back of the PET chair seat.

[0013] In a preferred embodiment, the cross-sectional shape of the connecting part is pentagonal.

[0014] In a preferred embodiment, the support column is detachably connected and fixed to the base and the mounting seat.

[0015] In a preferred embodiment, the base is surrounded by a barrier, which is integrally formed with the base, and the base is provided with a sloping groove near the barrier.

[0016] In a preferred embodiment, a drain outlet is provided at the bottom of the enclosure on one side of the base, the drain outlet is connected to a water pump, and the drain outlet is equipped with a filter screen.

[0017] In a preferred embodiment, a shock-absorbing pad is attached to the back of the base, and the side of the shock-absorbing pad facing away from the base is evenly provided with anti-slip protrusions.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] This utility model discloses a waterjet cutting fixture for a PET chair seat. It features a second through-hole on the connecting part of the mounting base, coaxially aligned with the external air pump interface (first through-hole). An air extraction hole communicating with the second through-hole is provided on the connecting surface between the connecting part and the first and second mounting bases. This, combined with the air cavity between the mounting base and the adsorption base, forms a closed-loop negative pressure system. The adsorption base has adsorption holes evenly distributed at corresponding positions within the air cavity. The negative pressure is transmitted to the entire contact surface through the air cavity, avoiding localized stress. This ingenious design adapts to the concave and convex surfaces of the PET chair seat, ensuring uniform distribution of adsorption force across the adsorption holes while reducing the need for adsorption piping, thus improving the stability of the fixture and the PET chair seat during waterjet cutting. During use, the external air pump controls the adsorption state, eliminating the need for physical clamping of the PET chair seat, reducing workpiece clamping time and improving efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0021] Figure 1 This is a schematic diagram of the PET chair seat waterjet cutting fixture structure in one embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection part and adsorption seat of the waterjet cutting fixture in one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the first mounting part in one embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the base structure in one embodiment of the present invention. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly.

[0027] It should also be understood that the terms "top", "bottom", "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] See Figures 1-3A waterjet cutting fixture for a PET chair seat includes: a base 100, support columns 200, mounting base 300, and suction base 400. The base 100 is connected to a waterjet cutting device and has a first through hole 110 for connecting to an external air pump. Two support columns 200 are arranged opposite each other on the base 100. The mounting base 300 includes a first mounting portion 310, a second mounting portion 320, and a connecting portion 330 connecting the first mounting portion 310 and the second mounting portion 320. The bottom surfaces of the first mounting portion 310 and the second mounting portion 320 are respectively connected and fixed to a support column 200. The connecting portion 330 is connected to the base 100 and has a connection to the first through hole 110. The second through hole 331 corresponding to position 10, the connecting part 330 and the connecting surface of the first mounting part 310 and the second mounting part 320 are provided with a plurality of air extraction holes 332, the air extraction holes 332 are connected to the second through hole 331; the adsorption seat 400 is connected and fixed on the mounting seat 300, the adsorption seat 400 is in contact with the edge of the mounting seat 300, and an air cavity is provided between the adsorption seat 400 and the first mounting part 310 and the second mounting part 320. Adsorption holes 410 are evenly distributed on the adsorption seat 400 corresponding to the position of the air cavity. In the air cavity, the adsorption holes, the air extraction holes and the second through hole form a gas channel. When the external air pump is turned on, air is extracted from the gas channel through the first through hole so that the adsorption holes adsorb the PET chair seat placed on the adsorption seat.

[0029] It should be noted that the clamp achieves precise fixation of the PET chair seat through the principle of pneumatic adsorption. The clamp base 100 is connected to the waterjet cutting device, and the first through hole 110 on it is connected to an external air pump to provide a negative pressure source for the system. The support column 200 and the base 100 together provide connection support for the mounting seat 300, offsetting the impact force of waterjet cutting and resisting vibration during the cutting process. An air cavity is formed between the mounting seat 300 and the adsorption seat 400. The second through hole 331 and the air extraction hole 332 of the connecting part 330 of the mounting seat 300 form a negative pressure channel, which is connected to the air cavity. The adsorption seat 400 fits against the edge of the mounting seat 300 and directly contacts the PET chair seat. With the cooperation of the air cavity and the adsorption hole 410, the PET chair seat is adsorbed and fixed. When the external air pump is started, air is drawn from the air chamber through the first through hole 110 of the base 100, the second through hole 331 of the connecting part 330, and the air extraction hole 332 of the connecting part 330, forming a closed negative pressure environment. After the PET chair seat comes into contact with the adsorption hole 410, the air is continuously drawn away, and a pressure difference is formed inside and outside the adsorption hole 410, generating an adsorption force. After the air pump is turned off, the pressure of the adsorption hole 410 returns to normal pressure, and the chair seat can be quickly disassembled, improving efficiency.

[0030] Understandably, the air chamber is designed to fit the curved surface of the PET chair seat, and flexible sealing strips such as silicone strips can be added to the connecting edges of the adsorption seat 400 and the mounting seat 300 to enhance air tightness and prevent air leakage.

[0031] This embodiment utilizes a second through hole 331 coaxially aligned with the external air pump interface (first through hole 110) and an air extraction hole 332 communicating with the second through hole 331 on the connecting part 330 of the mounting base 300. This, along with the air cavity between the mounting base 300 and the adsorption seat 400, forms a closed-loop negative pressure system. The adsorption seat 400 has adsorption holes 410 evenly distributed at corresponding positions within the air cavity. The negative pressure is transmitted to the entire contact surface through the air cavity, avoiding localized stress. This ingenious design adapts to the concave and convex surfaces of the PET chair seat, ensuring uniform distribution of adsorption force across the adsorption holes 410 while reducing the need for adsorption piping and improving the stability of the fixture and the PET chair seat during waterjet cutting. During use, the external air pump controls the adsorption state, eliminating the need for physical clamping, reducing workpiece clamping time, and improving efficiency.

[0032] In some embodiments, the air cavity includes a first groove 340 and a second groove 420. The first groove 340 is disposed on the surfaces of the first mounting portion 310 and the second mounting portion 320 facing the adsorption seat 400, and the second groove 420 is disposed on the surface of the adsorption seat 400 facing the first mounting portion 310 and the second mounting portion 320. After the adsorption seat 400 is connected and fixed on the mounting seat 300, the first groove 340 and the second groove 420 form an air cavity.

[0033] It should be noted that both the first mounting portion 310 and the second mounting portion 320 of the mounting base 300 are provided with a first groove 340, and the adsorption base 400 is also provided with a second groove 420 corresponding to the first groove 340, such as... Figure 2 As shown, two first grooves 340 are respectively provided on the first mounting part 310 and the second mounting part 320, and a corresponding second groove 420 is provided on the adsorption seat 400 to cooperate with it. When the adsorption seat 400 is connected and fixed on the mounting seat 300, the first groove 340 and the second groove 420 form multiple air chambers between the first mounting part 310 and the adsorption seat 400 and between the second mounting part 320 and the adsorption seat 400. The air extraction hole 332 provided on the connecting part 330 is connected to the corresponding air chamber and the second through hole 331. In this way, the cavity formed by the groove can guide the airflow to diffuse evenly, reduce eddies, and ensure that the pressure is consistent throughout the adsorption surface. Each air cavity is connected to the corresponding air extraction hole 332 and the second through hole 331, avoiding local adsorption failure caused by the pressure not being transmitted to areas with a large single air cavity area and a long pressure transmission distance. The second through hole 331 on the connecting part 330 is used as the main air extraction pipeline for multiple air cavities. The pressure of each cavity is controlled by branches through the air extraction hole 332, which is simpler and saves materials than the traditional complex air extraction pipeline.

[0034] In some embodiments, the adsorption seat 400 has the same shape as the PET chair seat, and the edge of the adsorption seat 400 is provided with an upward-curved step 430, which is fitted to the back edge of the PET chair seat. It can be understood that the adsorption seat 400 and the PET chair seat adopt a contour-mimicking design. The matching of their contours and the tight fit of the curved step can reduce gas leakage during the adsorption process. At the same time, the curvature structure of the step increases the contact friction, which can prevent the PET chair seat from shifting during vibration.

[0035] To further improve the anti-vibration capability during waterjet cutting, positioning holes can be provided on the edge of the adsorption seat 400. The positioning holes are used for positioning and connection with the back of the PET. It can be understood that the positioning pin is set on the back of the PET chair seat. The positioning pin can be formed together during molding, without increasing the cost. Moreover, it is on the back and does not affect the aesthetics and usability of the chair seat.

[0036] like Figure 3 The connecting part 330 has a pentagonal cross-section. Compared with the traditional square or triangular cross-section design, the pentagonal connecting part 330 provides more contact surfaces and support points. Three of its sides are connected to the first mounting part 310, the second mounting part 320, and the base 100, respectively. The remaining two sides provide support and stress distribution for each connecting edge. During waterjet cutting, the connecting part 330 will be subjected to the impact force from the water jet, the vibration force of the equipment, and the interaction force between various components. These forces can easily cause stress concentration in certain parts of the connection, thereby causing fatigue failure or fracture. The pentagonal cross-section shape can distribute the stress to multiple sides and corners, reducing the degree of stress concentration. It can withstand forces from multiple directions, thereby enhancing the overall connection strength, reducing the risk of fixture instability caused by damage to the connection, and further ensuring the stability of the entire structure, so that vibration and displacement during waterjet cutting can be effectively controlled.

[0037] To reduce maintenance costs, the support column 200 is detachably connected and fixed to the base 100 and mounting base 300, allowing damaged parts to be replaced individually. The detachable connection and fixing method can employ existing technology or variations thereof, and will not be elaborated further.

[0038] To prevent water spray and debris from splashing during water jet cutting, a barrier 120 can be installed around the base 100. The barrier 120 can be integrally formed with the base 100. The integrally formed structure is seamless, preventing cracking or water leakage at the connection between the barrier 120 and the base 100. Furthermore, a sloping groove 123 is provided on the base 100 near the barrier 120 to guide water collection and store debris.

[0039] To ensure timely drainage of cutting water, a drain outlet 121 is provided at the bottom of the enclosure 120 on one side of the base 100. The drain outlet 121 is connected to a water pump and is equipped with a filter screen 122. Furthermore, a water level sensor can be installed on the enclosure 120. When the water level inside the base 100 reaches a certain height, the water pump automatically starts to quickly pump out the water, ensuring that all cutting water can be drained in a timely manner.

[0040] To prevent displacement of the base 100 due to impact during operation, a shock-absorbing pad is attached to the back of the base 100. The shock-absorbing pad disperses the impact force during equipment operation through elastic deformation, reducing the vibration amplitude transmitted to the base 100. The side of the shock-absorbing pad facing away from the base 100 is evenly provided with anti-slip protrusions to increase the coefficient of friction with the contact surface (such as the waterjet cutting device mounting platform), prevent the base 100 from sliding, and further ensure the stability of the fixture during the waterjet cutting process.

[0041] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A waterjet cutting fixture for a PET chair seat, characterized in that, include: The base is connected to the water jet cutting device, and the base is provided with a first through hole for connecting an external air pump; Support columns, there are two support columns, which are arranged opposite to each other on the base; The mounting base includes a first mounting part, a second mounting part, and a connecting part connecting the first mounting part and the second mounting part. The bottom surfaces of the first mounting part and the second mounting part are respectively connected and fixed to a support column. The connecting part is connected to the base. The connecting part is provided with a second through hole that is coaxially aligned with the first through hole. A plurality of air extraction holes are provided on the connecting surface of the connecting part and the first mounting part and the second mounting part. The air extraction holes are connected to the second through hole. An adsorption seat is connected and fixed to the mounting base. The adsorption seat fits against the edge of the mounting base. An air cavity is provided between the adsorption seat and the first and second mounting parts. Adsorption holes are evenly distributed on the adsorption seat corresponding to the positions of the air cavity. In the air cavity, the adsorption holes, the air extraction holes, and the second through hole form a gas channel. When an external air pump is turned on, air is drawn from the gas channel through the first through hole, causing the adsorption holes to adsorb the PET chair seat placed on the adsorption seat.

2. The PET chair seat waterjet cutting fixture according to claim 1, characterized in that, The air cavity includes a first groove and a second groove. The first groove is disposed on the surface of the first mounting part and the second mounting part facing the adsorption seat, and the second groove is disposed on the surface of the adsorption seat facing the first mounting part and the second mounting part. After the adsorption seat is connected and fixed on the mounting seat, the first groove and the second groove form the air cavity.

3. The PET chair seat waterjet cutting fixture according to claim 1, characterized in that, The shape of the adsorption seat is the same as that of the PET chair seat, and the edge of the adsorption seat is provided with an upward arc step, and the back edge of the PET chair seat fits into the arc step.

4. The PET chair seat waterjet cutting fixture according to claim 1, characterized in that, The adsorption seat has a positioning hole on its edge, which is used for positioning and connecting with the back of the PET chair seat.

5. The PET chair seat waterjet cutting fixture according to claim 1, characterized in that, The cross-sectional shape of the connecting part is pentagonal.

6. The PET chair seat waterjet cutting fixture according to claim 1, characterized in that, The support column is detachably connected and fixed to the base and the mounting seat.

7. The PET chair seat waterjet cutting fixture according to claim 1, characterized in that, The base is surrounded by a barrier, which is integrally formed with the base.

8. The PET chair seat waterjet cutting fixture according to claim 7, characterized in that, The base has a sloping groove near the enclosure.

9. The PET chair seat waterjet cutting fixture according to claim 8, characterized in that, A drain outlet is provided at the bottom of the enclosure on one side of the base. A water pump is connected to the drain outlet, and a filter screen is provided at the drain outlet.

10. The PET chair seat waterjet cutting fixture according to claim 1, characterized in that, The back of the base is attached with a shock-absorbing pad, and the side of the shock-absorbing pad facing away from the base is evenly provided with anti-slip protrusions.

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