Universal vacuum tool for local vacuum

Abstract

The utility model provides a general vacuum tool for local vacuum, which comprises a tool bottom plate and a special cushion block, the special cushion block is attached to the top of the tool bottom plate, and the part, needing vacuum machining, of a part is adsorbed on the special cushion block; the vacuum generating device is added on the basis of the general hole tool, the special cushion block is used as a medium, and a local vacuum state is formed among the general vacuum tool, the special cushion block and the area, needing local vacuum machining, of the part. According to the general vacuum tool for local vacuum, local vacuum machining is adopted for areas, where the sizes of parts are difficult to guarantee, or areas prone to deformation and the like, and screw pressing machining is adopted for other areas. The vacuum machining device has universality, can achieve machining of most parts with different structures and needing vacuum machining, can meet rapid development, can greatly improve the machining efficiency and can reduce the production cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to numerical control processing frock design technical field, concretely relates to a partial vacuum general vacuum frock. BACKGROUND

[0002] Vacuum frock is a kind of device using vacuum suction to adsorb and fix workpiece. Its working principle is: first, the workpiece is sealed with vacuum clamp contact surface in the vacuum area using sealing strip, and the vacuum effect is ensured to be good. Secondly, the air in the sealing area of workpiece and vacuum clamp is extracted by vacuum generating device, thereby forming vacuum state, so that the workpiece is firmly adsorbed on vacuum frock. By operating suction valve to control the in and out of air flow, the adsorption and release of workpiece are realized. When the workpiece needs to be released, it is realized by making the closed cavity communicate with atmosphere. Vacuum frock is especially suitable for those parts that are difficult to be fixed by traditional mechanical clamping mode, thin-walled parts, easy-to-change parts and the like, and has the advantages of non-contact, non-damage, high adsorption force, reducing part deformation and the like.

[0003] However, it takes too long to develop special vacuum frock for different structures, small batch, ordinary frock difficult to process parts, and the cost of processing vacuum frock is too high (about 100,000 for each), and the special vacuum frock does not have universality. CONTENT OF UTILITY MODEL

[0004] To solve the above problems, the purpose of the utility model is to provide a kind of partial vacuum general vacuum frock, and the processing of most structures different and needing vacuum processing parts is realized by the partial vacuum general vacuum frock, can satisfy rapid development, can greatly improve processing efficiency, reduce production cost.

[0005] The purpose of the utility model is realized by the following technical scheme:

[0006] The utility model provides a kind of local vacuum general vacuum tooling, including tooling base plate and special pad.The tooling base plate is a hollow plate, vacuum valve for the inside of tooling base plate is installed on the side of tooling base plate;A plurality of first pressing holes with internal thread are provided on the top of tooling base plate, the inner wall of first pressing hole is not communicated with the inside of tooling base plate;A plurality of first sealing grooves are provided on the top of tooling base plate and are communicated with each other;A plurality of first air holes are provided on the top of tooling base plate and are communicated with the inside of tooling base plate.The special pad is attached to the top of tooling base plate, and a first sealing strip is arranged between the special pad and the tooling base plate, the first sealing strip is filled in the first sealing groove corresponding to the special pad, and the area of tooling base plate surrounded by the first sealing strip has at least one first air hole and at least one first pressing hole.At least one second air hole is provided on the top of special pad and communicated with the first air hole surrounded by the first sealing strip, and at least one second pressing hole is provided and communicated with the first pressing hole surrounded by the first sealing strip, the second pressing hole is a counterbore provided with locking bolt, the lower end of locking bolt is threadedly connected in the first pressing hole communicated with the second pressing hole, so as to press the special pad on the top of tooling base plate;A second sealing groove is provided on the top of special pad, and a second sealing strip is filled in the second sealing groove, the second sealing strip surrounds the second air hole and the second pressing hole.

[0007] The utility model adds vacuum generating device on the basis of general hole system tooling, uses special pad as medium, forms local vacuum state among general vacuum tooling, special pad and part local vacuum processing area, forms a kind of local vacuum general vacuum tooling for the region of part size difficult to guarantee or easy variability etc. using local vacuum processing, other regions adopt screw pressing processing.It is universal, can realize the processing of most structure different and needing vacuum processing parts, can satisfy rapid development, can greatly improve processing efficiency and reduce production cost. BRIEF DESCRIPTION OF DRAWINGS

[0008] The utility model will be further explained in detail in connection with the drawings.

[0009] Figure 1 It is the structure schematic drawing of the local vacuum general vacuum tooling of the utility model described in the installation special pad state.

[0010] Figure 2 It is the structure schematic drawing of the special pad of the utility model described. Figure 1 It is the local enlarged view of A in the middle.

[0011] Figure 3 It is the structure schematic drawing of the special pad of the utility model described.

[0012] Figure 4A state diagram of the first sealing strip mounted in the first sealing groove of the tooling bottom plate is described in the utility model.

[0013] Figure 5 A structure schematic diagram of the local vacuum general vacuum tool in the state of installing the special pad block is described in the utility model.

[0014] Figure 6 A schematic diagram of the part fixed on the vacuum tool and the special pad block is described.

[0015] Figure 7 A schematic diagram of the part and the special pad block is described.

[0016] As shown in the figure: 1-first pressing hole, 2-positioning hole, 3-vacuum air valve, 4-tooling bottom plate, 5-positioning groove, 6-first sealing groove, 7-first air hole, 8-special pad block, 9-second air hole, 10-second sealing groove, 11-second pressing hole, 12-part local vacuum processing area, 13-first sealing strip. DETAILED DESCRIPTION

[0017] The embodiments of the utility model will be described below by specific examples, and the skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. The described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the scope of protection of the utility model.

[0018] It should be known that the structure, proportion, size and the like drawn in the drawings of the specification are only used to cooperate with the content disclosed in the specification for the skilled in the art to understand and read, and not used to limit the limiting conditions of the utility model that can be implemented, so it does not have the technical essence, any modification of structure, change of proportion relationship or adjustment of size, in the absence of the effect and the purpose that can be produced by the utility model can be achieved, should still fall within the range that the technical content disclosed by the utility model can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in the specification are only for clear and easy to describe, not used to limit the range that the utility model can be implemented, the change or adjustment of relative relationship, when the technical content is not changed, it is also regarded as the scope that the utility model can be implemented.

[0019] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, the term "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium. Embodiment 1

[0020] As Figures 1 to 5 Indicated, the utility model provides a kind of local vacuum general vacuum tooling, including tooling base plate 4 and special pad 8.

[0021] As Figure 1 With Figure 2 Indicated, the tooling base plate 4 is a hollow rectangular plate inside, vacuum air extraction valve 3 for the vacuum extraction of tooling base plate 4 inside is installed in tooling base plate 4 side, vacuum air extraction valve 3 is the valve for controlling gas to enter or exit tooling base plate 4 inside, vacuum air extraction valve 3 is three-way valve, one end is communicated with tooling base plate 4 inside, one end is communicated with outside, another end is connected with air extraction pump, and rotation vacuum air extraction valve 3 can make any two ends thereof be connected.In the top of tooling base plate 4, a plurality of first pressing holes 1 with internal threads (the interval is 50mm*50mm) are provided, the first pressing holes 1 are arranged in a rectangular array on the top of the tooling base plate 4, and the inner walls of the first pressing holes 1 are not communicated with the inside of the tooling base plate 4.A plurality of first sealing grooves 6 are provided on the top of the tooling base plate 4 and are longitudinally and transversely arranged and communicated with each other, and the first sealing grooves 6 are arranged in a rectangular array on the top of the tooling base plate 4;The first sealing grooves 6 enclose a plurality of rectangular lattice areas on the top of the tooling base plate 4, and one first pressing hole 1 is arranged in each rectangular lattice area.In the top of tooling base plate 4, a plurality of first air extraction holes 7 are provided and communicated with the inside of tooling base plate 4, and the first air extraction holes 7 are also arranged in a rectangular array on the top of the tooling base plate 4.The first air extraction holes 7 are arranged in the first sealing grooves 6 between adjacent two first pressing holes 1, and the first air extraction holes 7 are also arranged at the intersection of longitudinal first sealing grooves 6 and transverse first sealing grooves 6.The first air extraction holes 7 are in a closed state when not in use, and a conventional way is to provide a plug in the first air extraction hole 7 for plugging the first air extraction hole 7 and being able to be pulled out when in use.In addition, positioning holes 2 and positioning grooves 5 for positioning parts are provided on the tooling base plate 4, and the parts are pressed for machining except the local vacuum machining area.

[0022] As Figure 5 Indicated, the special pad 8 is attached to the top of the tooling base plate 4.As Figure 4As shown, a first sealing strip 13 in annular shape is arranged between the special pad 8 and the tool base plate 4, and the first sealing strip 13 is filled in the first sealing groove 6 corresponding to the special pad 8 directly below. In the area of the tool base plate 4 surrounded by the first sealing strip 13, there is at least one first air extraction hole 7 and two or more first pressing holes 1.

[0023] On the top of the special pad 8, there is at least one second air extraction hole 9 communicating with the first air extraction hole 7 surrounded by the first sealing strip 13, and there is also at least one second pressing hole 11 aligned and communicating with the first pressing hole 1 surrounded by the first sealing strip 13 (concentric and communicating), the second pressing hole 11 is a counterbore hole provided with a locking bolt, and the locking bolt is also a counterbore bolt, the lower end of the locking bolt is threadedly connected in the first pressing hole 1 aligned and communicating with the second pressing hole 11, so as to press the special pad 8 on the top of the tool base plate, and after the connection is completed, the top of the locking bolt is lower than the top of the special pad 8. On the top of the special pad 8, there is a second sealing groove 10 in annular shape, and a second sealing strip is filled in the second sealing groove 10, the second sealing strip surrounds the second air extraction hole 9 and the second pressing hole 11, and the area surrounded by the second sealing groove 10 and the second sealing strip is the local vacuum processing area 12 of the part.

[0024] The first sealing strip 13 and the second sealing strip are both closed-loop annular rubber strips.

[0025] For different structures of parts, special pads 8 are made for local vacuum processing areas.

[0026] Taking a frame part as an example, see Figure 3 The special pad 8, this type of pad is generally used for frame parts with large frame area and cannot be processed by screw pressing, and the thickness and deformation of the web are difficult to guarantee. The special pad 8 is in rectangular structure, and the top of the special pad 8 is provided with one second air extraction hole 9 aligned and communicating with one first air extraction hole 7 surrounded by the first sealing groove 6, and the top of the special pad 8 is provided with two second pressing holes 11 aligned with the two first pressing holes 1 surrounded by the first sealing groove 6.

[0027] Under normal circumstances, when the first surface of the frame part is processed, the web has a large remaining amount, the size of the web is easy to guarantee, and therefore vacuum processing is not required. When the second frame surface is precisely milled, local vacuum processing is required, and the processing steps are as follows:

[0028] As shown in Figure 4 The tool base plate 4 is fixed on the machine tool workbench, the first sealing strip 13 is laid full in the first sealing groove 6 corresponding to the special pad 8 area on the tool base plate 4, and it is ensured that the first air extraction hole 7 surrounded by the first sealing strip 13 on the tool base plate 4 and communicating with the second air extraction hole 9 is open, and the remaining first air extraction holes 7 are all closed.

[0029] As Figure 5 shown, the special pad 8 is positioned and pressed on the tool base plate 4 by locking bolts, at this time the first sealing strip 13 is located and pressed between the special pad 8 and the tool base plate 4, and the second air extraction hole 9 is aligned with and connected to the first air extraction hole 7 in the area surrounded by the first sealing strip 13.

[0030] As Figure 6 shown, the second sealing strip is laid in the second sealing groove 10 on the special pad 8, and the square area surrounded by the second sealing strip is the part of the part that needs to be processed in a local vacuum, the part is positioned through the positioning hole 2 or the positioning groove 5, and the part that needs to be processed in a local vacuum is aligned with the part that needs to be processed in a local vacuum area 12 of the special pad 8, and the part is pressed by the pressing screw (the screw of the first pressing hole 1) to make the part and the special pad 8 fit together (as Figure 7 shown, the part web and the special pad 8 fit together), that is, the special pad 8 is fixed between the tool base plate 4 and the part that needs to be processed in a local vacuum frame surface.

[0031] Then, the vacuum air extraction valve 3 is connected to the air extraction pump through the conduit, the vacuum air extraction valve 3 is adjusted to be connected to the air extraction pump end and the tool base plate 4 end (while the external end is closed), and the air in the sealed area between the part and the tool base plate 4 and the special pad 8 is extracted by the vacuum air extraction valve 3 through the air extraction hole 9, so as to form a vacuum state, so that the part is firmly adsorbed on the vacuum tool, the adsorption of the special pad and the general vacuum tool and the part local frame surface is realized, the local vacuum processing of the part is realized, the inflow and outflow of air is controlled by operating the vacuum air extraction valve 3, and the adsorption and release of the workpiece are realized. Note that at this time the remaining first air extraction holes 7 on the tool are in a closed state, only one first air extraction hole 7 in the local vacuum processing area is in an open state, and the screws connected to the periphery of the first sealing strip 13 in the first pressing hole 1 press the part outside the local vacuum processing area.

[0032] The remaining structure of various parts, such as curved parts, wall plate parts, and beam parts, can be made into special pads for local vacuum processing. The local vacuum processing method is used to process parts, and the special pad is made, which greatly reduces the processing cycle and cost of special vacuum tools, and can greatly improve the processing efficiency of parts and reduce production cost. Example 2

[0033] In order to realize rapid vacuum extraction, the following structure is added based on example 1.

[0034] The tool base plate 4 is divided into a plurality of independent cavities, the tool base plate 4 is divided into a plurality of independent areas corresponding to the independent cavities one by one, each independent cavity is communicated with the first air exhaust hole 7 in the independent area directly above, and each independent cavity is respectively connected with a vacuum air exhaust valve 3. During vacuumizing, only the independent area corresponding to the special pad 8 at the local vacuum position of the part is found, the vacuum pump inlet is connected with the vacuum air exhaust valve 3 in the independent area through a pipeline.

[0035] Other details of the utility model are conventional technology known by those skilled in the art.

[0036] It should be noted that the terms "comprising", "containing" or any other variant are intended to cover non-exclusive inclusions, so that the process, method, article or equipment containing a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0037] The protection scope of the utility model is not limited to the technical solutions disclosed in the specific embodiments, and any modification, equivalent replacement, improvement, etc. of the above embodiments according to the technical essence of the utility model falls within the protection scope of the utility model.

Claims

1. A partial vacuum general purpose vacuum tooling characterized by: The tooling base plate and the special pad block are included. The tooling base plate is a hollow plate, and a vacuum valve is arranged on the side of the tooling base plate for vacuumizing the inside of the tooling base plate. A plurality of first pressing holes with internal threads are arranged on the top of the tooling base plate. A plurality of first sealing grooves are arranged on the top of the tooling base plate and are in communication with each other. A plurality of first air holes are arranged on the top of the tooling base plate and are in communication with the inside of the tooling base plate. The special pad block is attached to the top of the tooling base plate, and an annular first sealing strip is arranged between the special pad block and the tooling base plate. The first sealing strip is filled in the first sealing groove corresponding to the special pad block. The area of the tooling base plate surrounded by the first sealing strip has at least one first air hole and at least one first pressing hole. At least one second air hole is arranged on the top of the special pad block and is in communication with the first air hole surrounded by the first sealing strip. At least one second pressing hole is arranged on the top of the special pad block and is in one-to-one alignment with the first pressing hole surrounded by the first sealing strip. The second pressing hole is a counter-sunk hole provided with a locking bolt. The lower end of the locking bolt is threadedly connected in the first pressing hole in alignment with the second pressing hole, so as to press the special pad block on the top of the tooling base plate. An annular second sealing groove is arranged on the top of the special pad block, and a second sealing strip is filled in the second sealing groove. The second sealing strip surrounds the second air hole and the second pressing hole.

2. The partial vacuum general purpose vacuum tooling of claim 1, wherein: The top of the special pad block is provided with one second air hole in communication with one first air hole surrounded by the first sealing groove.

3. The partial vacuum general purpose vacuum tooling of claim 1, wherein: The top of the special pad block is provided with two second pressing holes in one-to-one alignment with two first pressing holes surrounded by the first sealing groove.

4. The partial vacuum general purpose vacuum tooling of claim 1, wherein: The first pressing holes, the first sealing grooves, and the first air holes are arranged in a rectangular array on the top of the tooling base plate.

5. The partial vacuum general purpose vacuum tooling of claim 4, wherein: The first sealing grooves form a plurality of rectangular lattice areas on the top of the tooling base plate. Each rectangular lattice area is provided with one first pressing hole.

6. The partial vacuum general purpose vacuum tooling of claim 4, wherein: The first air holes are arranged in the first sealing grooves between two adjacent first pressing holes. The first air holes are also arranged at the intersection of the first sealing grooves.

7. The partial vacuum general purpose vacuum tooling of claim 1, wherein: A plug is arranged in the first air hole for plugging the first air hole and can be pulled out when in use.

8. The partial vacuum general purpose vacuum tooling of claim 1, wherein: The inside of the tooling base plate is divided into a plurality of independent cavities. The tooling base plate is divided into a plurality of independent areas corresponding to the independent cavities. Each independent cavity is in communication with the first air hole in the independent area above it. Each independent cavity is respectively connected with one vacuum valve.

9. The partial vacuum general purpose vacuum tooling of claim 1, wherein: Positioning holes and positioning grooves are arranged on the tooling base plate for positioning parts.

10. The partial vacuum general purpose vacuum tooling of claim 1, wherein: Screws are threadedly connected in the first pressing holes outside the periphery of the first sealing strip for pressing other parts except the local vacuum processing area.

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