Clamping and positioning device special for thin-wall shell part
By designing a clamping positioning device for thin-walled shell parts, the device uses the negative pressure adsorption cavity formed by the sealing ring inner cavity to solve the problems of movement, fall off and deformation caused by improper clamping force during the processing, achieving a more stable and accurate processing process.
Patent Information
- Application Number
- CN202421246348.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-03
AI Technical Summary
The prior art is difficult to effectively solve the problems of movement, fall off and deformation caused by improper clamping force during processing of thin-walled parts.
A special type clamping positioning device for thin-walled shell parts is designed, which includes a tool body, a raised base and a sealing ring, and the adsorption and fixation of thin-walled parts is achieved through the negative pressure adsorption cavity formed by the inner cavity of the sealing ring.
The device effectively fixes thin-walled parts through the negative pressure adsorption chamber, avoiding movement and falling off caused by too small clamping force, as well as deformation caused by too large clamping force, and improving the stability and accuracy of the processing process.
Smart Images
Figure CN222661442U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an auxiliary positioning device for parts processing, in particular to a special clamping and positioning device for thin-wall shell parts. Background Art
[0002] Thin-walled parts refer to metal parts whose wall thickness is very different from the radial or axial dimensions of the parts. Usually, the ratio of wall thickness to axial or radial dimensions is greater than 1 / 10. Such parts have the characteristics of saving materials and simple structure, and usually have the characteristics of relatively low mass, high specific strength, complex structure and weak rigidity. Due to the complex structure of thin-walled parts, they require special processes to ensure quality and precision during the manufacturing process. The main application areas of thin-walled parts cover many fields such as automobiles, electronics, aerospace, medical devices, etc. Among them, the automotive and electronics industries are the most widely used areas for thin-walled parts, such as automobile housings, chassis components, engine parts, etc., and the housings and internal parts of electronic products such as mobile phones and computers.
[0003] The clamping requirements for thin-walled parts are relatively high. If the clamping force is too small, the product will move or fall off during the processing. If the clamping force is too large, the product will be deformed. In addition, because thin-walled parts are thin, they are prone to deformation during processing, making the size of the workpiece difficult to control. Therefore, it is necessary to design a clamping and positioning device that integrates clamping and positioning. Utility Model Content
[0004] The technical problem to be solved by the utility model is: to provide a special clamping and positioning device for thin-walled shell parts in view of the defects of the prior art.
[0005] The utility model adopts the following technical solutions to solve the above technical problems:
[0006] A special clamping and positioning device for thin-walled shell parts includes a tool body, a raised base and a sealing ring, wherein: there is at least one raised base, which is integrally arranged on the top of the tool body with a left-right interval; the sealing ring is arranged in the groove on the top of the raised base, and a plurality of air holes that are downwardly connected to the negative pressure groove at the bottom of the tool body are opened at the bottom of the inner ring groove of the sealing ring.
[0007] Preferably, the tool body is a rectangular block structure, and at least one of the negative pressure grooves is provided at intervals on the left and right sides of the bottom thereof, and an air inlet connected to the negative pressure groove is provided at a corresponding position of the side wall.
[0008] Preferably, at least one positioning hole and a positioning groove corresponding to the outer side of the raised base are formed on the top of the tool body, and a positioning column is embedded in the positioning hole.
[0009] Preferably, the top of the protruding base is provided with a first limiting boss and a second limiting boss in sequence from the outside to the inside, and a third limiting boss located outside the first limiting boss, wherein:
[0010] A first sealing groove is formed at the top of the first limiting boss along its length direction, a second sealing groove is formed at the top of the second limiting boss along its length direction, and a third sealing groove is formed at the top of the third limiting boss along its length direction.
[0011] More preferably, the groove between the first limiting boss and the second limiting boss forms a first adsorption groove, the inner circle of the second limiting boss forms the second adsorption groove, and the inner circle of the third limiting boss forms a third adsorption groove.
[0012] More preferably, a plurality of first air holes downwardly connected to the negative pressure groove are formed at the bottom of the first adsorption groove and / or the second adsorption groove, and a plurality of second air holes downwardly connected to the negative pressure groove are formed at the bottom of the third adsorption groove.
[0013] Preferably, the first limiting boss and the third limiting boss are arranged adjacent to each other to form a circular structure, wherein:
[0014] The first limiting boss is in a major arc shape, and the third limiting boss is in a minor arc shape; the first limiting boss and the second limiting boss have the same horizontal height, and both are greater than the horizontal height of the third limiting boss.
[0015] Preferably, the sealing ring comprises a first sealing ring, a second sealing ring and a third sealing ring, wherein:
[0016] The first sealing ring is embedded in the first sealing groove at the top of the raised base, the second sealing ring is embedded in the second sealing groove at the top of the raised base, and the third sealing ring is embedded in the third sealing groove at the top of the raised base.
[0017] Preferably, the special clamping and positioning device for thin-walled shell parts further comprises a positioning column detachably arranged on the tooling body, wherein:
[0018] The positioning column is a large and small head structure, the lower end of which is embedded in the positioning hole, and the upper end is arranged as a round pressure head.
[0019] Preferably, the special clamping and positioning device for thin-walled shell parts further comprises a bottom cover detachably mounted in the corresponding negative pressure groove, wherein:
[0020] The bottom cover is disc-shaped, and a lower groove is provided in the middle of the top thereof, and the lower groove and the negative pressure groove form a sealed negative pressure chamber;
[0021] The bottom cover is fixedly installed in the threaded hole at the bottom of the negative pressure groove by bolts in the screw holes on its outer periphery, and a sealing ring is embedded in the sealing ring groove at the bottom of the negative pressure groove.
[0022] The utility model adopts the above technical solution, and compared with the prior art, has the following technical effects:
[0023] The utility model provides a special clamping and positioning device for thin-walled shell parts, which arranges a sealing ring on the raised base and utilizes the negative pressure adsorption cavity formed in the inner cavity of the sealing ring to realize the adsorption and fixation of the thin-walled parts thereon, thereby solving the problems that the existing clamping force is too small, which may cause the product to move and fall off during the processing, and the clamping force is too large, which may cause the product to deform. The clamping and positioning device has a simple and novel structural design, reliable performance, and easy operation, and can be used in the processing of thin-walled parts. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a three-dimensional structural schematic diagram of a special clamping and positioning device for thin-walled shell parts of the utility model;
[0025] Figure 2 This is a partial enlarged structural schematic diagram of part A in a special clamping and positioning device for thin-walled shell parts of the utility model;
[0026] Figure 3 This is a schematic diagram of the top view of a special clamping and positioning device for thin-walled shell parts of the utility model;
[0027] Figure 4 This is a schematic cross-sectional view of a special clamping and positioning device for thin-walled shell parts of the utility model;
[0028] Figure 5 It is a three-dimensional structural schematic diagram of a tooling body and a raised base in a special clamping and positioning device for thin-walled shell parts of the utility model;
[0029] Figure 6 It is a three-dimensional structural schematic diagram of the tooling body and the raised base B part in a special clamping and positioning device for thin-walled shell parts of the utility model;
[0030] Figure 7 It is a schematic diagram of the top view of the structure of the tooling body and the raised base in a special clamping and positioning device for thin-walled shell parts of the utility model;
[0031] Figure 8 It is a schematic cross-sectional structure diagram of a tooling body and a raised base in a special clamping and positioning device for thin-walled shell parts of the utility model;
[0032] Fig. 9This is a schematic diagram of the structure of a positioning column in a special clamping and positioning device for thin-walled shell parts of the utility model;
[0033] Fig.10 This is a schematic diagram of the three-dimensional structure of a bottom cover in a special clamping and positioning device for thin-walled shell parts of the utility model;
[0034] Fig.11 This is a bottom view structural schematic diagram of a bottom cover in a special clamping and positioning device for thin-walled shell parts of the utility model;
[0035] Fig.12 The utility model is a schematic cross-sectional structural diagram of a bottom cover in a special clamping and positioning device for thin-walled shell parts. DETAILED DESCRIPTION
[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0037] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.
[0038] In some embodiments, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a special clamping and positioning device for thin-walled shell parts is provided, which mainly includes a tool body 10, a protruding base 20, a sealing ring 30 and a positioning column 40. The tool body 10 and the protruding base 20 can adopt a split structure design or an integrated structure design, the tool body 10, the protruding base 20 and the positioning column 40 are made of stainless steel or aluminum alloy, and the sealing ring 30 is made of rubber.
[0039] Specifically, in order to improve the processing efficiency of thin-walled parts, a plurality of raised bases 20 can be installed on the tooling body 10. The plurality of raised bases 20 are integrally arranged on the top of the tooling body 10 at intervals on the left and right, thereby forming a plurality of installation and positioning stations on the tooling body 10, which is convenient for processing a plurality of thin-walled parts at the same time.
[0040] The fixing of the thin-walled product to be processed is achieved by the negative pressure adsorption force generated in the sealing ring 30, and the positioning is performed in conjunction with the positioning column 40 detachably arranged on the tooling body 10 to solve the problem that the existing clamping force is too small, which may cause the product to move and fall off during processing, and the clamping force is too large, which may cause the product to deform. The sealing ring 30 is detachably embedded in the corresponding groove on the top of the raised base 20, and the sealing ring 30 forms a negative pressure adsorption groove in the inner cavity.
[0041] In order to generate negative pressure in the adsorption groove, a plurality of air holes are opened at the bottom of the inner ring groove of the sealing ring 30 and downwardly connected to the negative pressure groove 11 at the bottom of the tooling body 10. The adsorption groove is evacuated through the air holes by an external vacuum device to generate negative pressure, so as to adsorb and fix the thin-walled products that are tightly fitted with the sealing ring 30 on the raised base 20.
[0042] In some of the embodiments, such as Figure 1 , Figure 4 , Figure 5 and Figure 8 As shown, the tool body 10 is a rectangular block structure, which is made of steel plate or integrally cast. At least one negative pressure groove 11 is provided at intervals on the bottom of the tool body 10, and the negative pressure groove 11 corresponds to the position of the raised base 20 on the top thereof.
[0043] An air inlet 14 connected to the negative pressure groove 11 is provided at a corresponding position of the side wall of the tooling body 10 . The air inlet 14 is connected to an external vacuum pump through a hose to provide negative pressure adsorption force to the negative pressure chamber formed in the negative pressure groove 11 .
[0044] In addition, in order to achieve accurate positioning of the thin-walled shell products to be processed, according to the structural characteristics of the thin-walled shell products, at least one positioning hole 12 and a positioning groove 13 corresponding to the outer side of the protruding base 20 are opened on the top of the tool body 10, and a positioning column 40 is embedded in the positioning hole 12. The positioning pin and positioning hole at the bottom of the thin-walled shell product can accurately match the positioning groove 13 and the positioning column 40, thereby ensuring the accuracy of the placement of the thin-walled shell product and the processing quality of the product.
[0045] In some of the embodiments, Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in order to facilitate the installation of the annular sealing strip 30 and to ensure that the thin-walled shell parts to be processed can be tightly adsorbed on the top of each positioning platform 202, a plurality of annular sealing strips 30 are used, and accordingly, a first limiting boss 21 and a second limiting boss 22 are sequentially arranged on the top of the raised base 20 from the outside to the inside, as well as a third limiting boss 23 located on the outside of the first limiting boss 21.
[0046] Specifically, a first sealing groove 211 is formed at the top of the first limiting boss 21 along its length direction, a second sealing groove 221 is formed at the top of the second limiting boss 22 along its length direction, and a third sealing groove 231 is formed at the top of the third limiting boss 23 along its length direction. The first sealing groove 211, the second sealing groove 221, and the third sealing groove 231 are all annular groove structures connected end to end, and various annular sealing strips can be embedded and installed.
[0047] In order to achieve negative pressure adsorption of thin-walled shell parts on the annular sealing strip 30, it is necessary to form adsorption grooves of a certain size between the bosses of the raised base 20 to generate a sufficient adsorption surface for the thin-walled shell parts. Specifically, the groove between the first limiting boss 21 and the second limiting boss 22 forms the first adsorption groove 24, the inner circle of the second limiting boss 22 forms the second adsorption groove 25, and the inner circle of the third limiting boss 23 forms the third adsorption groove 26.
[0048] Each adsorption groove has a pore at the bottom thereof that is connected downwardly to the negative pressure groove 11. Specifically, a plurality of first pores 241 that are connected downwardly to the negative pressure groove 11 are provided at the bottom of the first adsorption groove 24 and / or the second adsorption groove 25, and a plurality of second pores 261 that are connected downwardly to the negative pressure groove 11 are provided at the bottom of the third adsorption groove 26. There are a plurality of first pores 241 and a plurality of second pores 261 that are arranged at intervals at the bottom of each adsorption groove, and the number of the first pores 241 and the second pores 261 is reasonably set according to the area of the adsorption groove.
[0049] In addition, if Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, according to the structural characteristics of the thin-walled shell part to be processed, the first limiting boss 21 and the third limiting boss 23 are arranged adjacent to each other to form a circular structure. The first limiting boss 21 is in a major arc shape, and the third limiting boss 23 is in a minor arc shape; the first limiting boss 21 and the second limiting boss 22 have the same horizontal height, and both are greater than the horizontal height of the third limiting boss 23.
[0050] In some of the embodiments, Figure 1 , Figure 2 and Figure 3 As shown, in order to ensure the stability of adsorption of the thin-walled shell parts to be processed, the sealing ring 30 is multiple, including a first sealing ring 31, a second sealing ring 32 and a third sealing ring 33, and the inner cavity of each sealing ring forms an independent adsorption chamber.
[0051] Each sealing ring plays the role of sealingly connecting the raised base 20 below and the thin-walled shell part to be processed above. Specifically, the first sealing ring 31 is embedded in the first sealing groove 211 at the top of the raised base 20, the second sealing ring 32 is embedded in the second sealing groove 221 at the top of the raised base 20, and the third sealing ring 33 is embedded in the third sealing groove 231 at the top of the raised base 20.
[0052] In some of the embodiments, Figure 1 , Figure 2 and 9 As shown, in order to cooperate with the sealing ring 30 to prevent the thin-walled shell part to be processed from moving and falling off, the device also includes a positioning column 40 detachably arranged on the tooling body 10. There are multiple positioning columns 40, which are arranged at the outer position of the raised base 20 and correspond to the positioning groove at the bottom of the thin-walled shell part to be processed.
[0053] In order to improve the convenience and accuracy of the positioning operation, the positioning column 40 is designed as a large and small head structure, with its lower end embedded in the positioning hole 12 and the upper end being set as a round pressure head 41. The diameter of the round pressure head 41 is smaller than the diameter of the lower end of the positioning column 40, so as to facilitate insertion into the positioning groove at the bottom when placing thin-walled shell parts.
[0054] In some of the embodiments, Figure 4 , Fig.10 , Figure 1 and Fig.12 As shown, the clamping and positioning device also includes a bottom cover 50 detachably mounted in the negative pressure groove 11, and the bottom cover 50 is fixedly mounted on the bottom of the tooling body 10 by bolts 60. There are multiple bottom covers 50, which are installed in each negative pressure groove 11 to block the negative pressure groove 11.
[0055] Specifically, the bottom cover 50 is disc-shaped, similar to the shape of the negative pressure groove 11 , and a lower groove 51 is provided in the middle of the top thereof. The lower groove 51 and the negative pressure groove 11 form a sealed negative pressure chamber, which is connected to the air inlet 14 on the side wall of the tooling body 10 .
[0056] To facilitate the installation of the bolts 60, a plurality of equally spaced screw holes 52 are provided on the outer periphery of the bottom cover 50. Each bolt 60 is inserted into the screw hole 52 and then threadedly installed in the threaded hole 111 at the bottom of the negative pressure tank 11 to fix the bottom cover 50.
[0057] In addition, in order to improve the sealing of the negative pressure chamber, the bottom cover 50 needs to be sealed and installed in the negative pressure groove 11. A sealing ring 70 is embedded in the sealing ring groove 112 at the bottom of the negative pressure groove 11, and the sealing ring 70 ensures seamless connection between the two to avoid air leakage.
[0058] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 The working principle of the special clamping and positioning device for thin-walled shell parts is as follows: the operator first places the first sealing ring 31, the second sealing ring 32 and the third sealing ring 33 in the corresponding sealing grooves on the top of the raised base, and then places the thin-walled shell part to be processed on the raised base 20, and a stable positioning effect is formed by the positioning column 40 and the raised base 20. After the air inlet 14 is connected to the vacuum generator, the part can generate downward pressure, making it easy to clamp and the product is not easy to deform. The special positioning device has a simple structure, reliable performance, and easy operation, and can be used in the processing of thin-walled parts.
[0059] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;
[0060] Secondly, the drawings of the embodiments disclosed in the present utility model only involve structures related to the embodiments disclosed in the present utility model, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;
[0061] Finally, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A special clamping and positioning device for thin-walled shell parts, characterized in that: It includes a tooling body, a raised base and a sealing ring, wherein: there is at least one raised base, which is integrally arranged on the top of the tooling body with a left-right interval; the sealing ring is arranged in the groove on the top of the raised base, and a plurality of air holes that are downwardly connected to the negative pressure groove at the bottom of the tooling body are opened at the bottom of the inner ring groove of the sealing ring.
2. The special clamping and positioning device for thin-walled shell parts according to claim 1 is characterized in that: The tooling body is a rectangular block structure, and at least one negative pressure groove is provided at intervals on the left and right sides of the bottom thereof, and an air inlet connected to the negative pressure groove is provided at a corresponding position of the side wall.
3. The special clamping and positioning device for thin-walled shell parts according to claim 1 is characterized in that: At least one positioning hole and a positioning groove corresponding to the outer side of the raised base are formed on the top of the tool body, and a positioning column is embedded in the positioning hole.
4. The special clamping and positioning device for thin-walled shell parts according to claim 1 is characterized in that: The top of the protruding base is provided with a first limiting boss and a second limiting boss in sequence from outside to inside, and a third limiting boss located outside the first limiting boss, wherein: A first sealing groove is formed at the top of the first limiting boss along its length direction, a second sealing groove is formed at the top of the second limiting boss along its length direction, and a third sealing groove is formed at the top of the third limiting boss along its length direction.
5. The special clamping and positioning device for thin-walled shell parts according to claim 4 is characterized in that: The groove between the first limiting boss and the second limiting boss forms a first adsorption groove, the inner circle of the second limiting boss forms a second adsorption groove, and the inner circle of the third limiting boss forms a third adsorption groove.
6. The special clamping and positioning device for thin-walled shell parts according to claim 5 is characterized in that: A plurality of first air holes downwardly connected to the negative pressure groove are formed at the bottom of the first adsorption groove and / or the second adsorption groove, and a plurality of second air holes downwardly connected to the negative pressure groove are formed at the bottom of the third adsorption groove.
7. The special clamping and positioning device for thin-walled shell parts according to claim 4 is characterized in that: The first limiting boss and the third limiting boss are arranged adjacent to each other to form a circular structure, wherein: The first limiting boss is in a major arc shape, and the third limiting boss is in a minor arc shape; the first limiting boss and the second limiting boss have the same horizontal height, and both are greater than the horizontal height of the third limiting boss.
8. The special clamping and positioning device for thin-walled shell parts according to claim 1 is characterized in that: The sealing ring includes a first sealing ring, a second sealing ring and a third sealing ring, wherein: The first sealing ring is embedded in the first sealing groove at the top of the raised base, the second sealing ring is embedded in the second sealing groove at the top of the raised base, and the third sealing ring is embedded in the third sealing groove at the top of the raised base.
9. The special clamping and positioning device for thin-walled shell parts according to claim 1 is characterized in that: It also includes a positioning column detachably arranged on the tool body, wherein: The positioning column is a large and small head structure, the lower end of which is embedded in the positioning hole, and the upper end is arranged as a round pressure head.
10. The special clamping and positioning device for thin-walled shell parts according to claim 1, characterized in that: It also includes a bottom cover that can be detachably mounted in the corresponding negative pressure tank, wherein: The bottom cover is disc-shaped, and a lower groove is provided in the middle of the top thereof, and the lower groove and the negative pressure groove form a sealed negative pressure chamber; The bottom cover is fixedly installed in the threaded hole at the bottom of the negative pressure groove by bolts in the screw holes on its outer periphery, and a sealing ring is embedded in the sealing ring groove at the bottom of the negative pressure groove.