A clamping device, a threaded hole machining system and a threaded hole machining method

Abstract

The present application relates to the technical field of clamping device, in particular to a kind of clamping device, threaded hole processing system and threaded hole processing method.The clamping device includes chuck assembly and jaw assembly;Jaw assembly is equidistantly arranged on the surface of chuck assembly;Jaw assembly includes jaw, the clamping surface of jaw is curved surface, clamping surface is equipped with first clamping area and second clamping area, first clamping area is equipped with n first bosses, second clamping area is provided with m second bosses, wherein, n and m are natural number, n > 1, m > 1, the first mesa area of single first boss is greater than the second mesa area of single second boss, there is first spacing between adjacent first mesa, there is second spacing between adjacent second mesa, first spacing ≤ second spacing.This solves the problem that workpiece moves along clamping surface towards axial direction when workpiece is subjected to longitudinal force during threaded hole processing.

Description

Technical Field

[0001] This invention relates to the field of clamping device technology, and more specifically, to a clamping device, a threaded hole machining system, and a threaded hole machining method. Background Technology

[0002] Conventional clamping devices clamp the workpiece by using a chuck and jaws. When clamping the workpiece, due to limitations imposed by the draft angle, wall thickness, and machining allowance during the machining process, a large clamping force is often required to achieve a tight clamping, even though the workpiece may have already experienced slight or significant displacement.

[0003] The lack of effective clamping and positioning in the current end-face toothed bell-shaped shell thread processing leads to deviations in the product thread processing, failure to meet technical requirements, excessive wear, low efficiency, and instability during the processing. Summary of the Invention

[0004] To address the problem that when machining threaded holes on a workpiece, the workpiece is subjected to longitudinal forces, causing it to move axially along the clamping surface, this invention provides a clamping device, a threaded hole machining system, and a threaded hole machining method.

[0005] In a first aspect, the present invention provides a clamping device, comprising:

[0006] Chuck assembly and gripper assembly;

[0007] The gripper assemblies are circumferentially arranged at equal intervals on the surface of the chuck assembly;

[0008] The gripper assembly includes grippers with a curved gripping surface. The gripping surface has a first gripping area and a second gripping area. The first gripping area is a first force-bearing area, and the second gripping area is a second force-bearing area. The first force in the first force-bearing area is greater than the second force in the second force-bearing area. The first gripping area has n first protrusions, and the second gripping area has m second protrusions, where n and m are natural numbers, n > 1, m > 1. The area of ​​the first surface of a single first protrusion is greater than the area of ​​the second surface of a single second protrusion. There is a first spacing between adjacent first surfaces and a second spacing between adjacent second surfaces, where the first spacing is less than or equal to the second spacing.

[0009] According to one embodiment of the present invention, the first clamping area is close to the center of the clamping surface, the second clamping area is far from the center of the clamping surface, the area of ​​the first platform of n first protrusions along the direction close to the center of the clamping surface gradually decreases until it reaches a first pre-value range, and the area of ​​the second platform of m second protrusions along the direction far from the center of the clamping surface gradually decreases until it reaches a second pre-value range, the minimum value of the first pre-value range is equal to or greater than the maximum value of the second pre-value range.

[0010] According to one embodiment of the present invention, n first bosses and m second bosses are formed by grooves, the grooves including U-shaped grooves, V-shaped grooves or dovetail grooves.

[0011] According to one embodiment of the present invention, the first spacing between adjacent first platform surfaces in the axial direction is the same as or different from the first spacing between adjacent first platform surfaces in the radial direction; the second spacing between adjacent second platform surfaces in the axial direction is the same as or different from the second spacing between adjacent second platform surfaces in the radial direction.

[0012] In the first clamping area, the first platform area of ​​the first boss near the chuck assembly is larger than the first platform area of ​​the first boss away from the chuck assembly.

[0013] In the second clamping region, the area of ​​the second platform of the second boss near the chuck assembly is larger than the area of ​​the second platform of the second boss away from the chuck assembly.

[0014] According to one embodiment of the present invention, among n first platforms along the same axial or radial direction, the first spacing between adjacent first platforms may be the same or different;

[0015] Among the m second platforms along the same axial or radial direction, the second spacing between adjacent second platforms may be the same or different.

[0016] According to one embodiment of the present invention, the first boss has a first deformation coefficient, the second boss has a second deformation coefficient, and the first deformation coefficient is smaller than the second deformation coefficient.

[0017] According to one embodiment of the present invention, the first boss has a first inclined surface in the upward direction along the axial direction, the second boss has a second inclined surface, the first boss has a third inclined surface in the downward direction along the axial direction, and the second boss has a fourth inclined surface. The inclination angle of the first inclined surface is smaller than the inclination angle of the second inclined surface, and the inclination angle of the third inclined surface is smaller than the inclination angle of the fourth inclined surface.

[0018] According to one embodiment of the present invention, the tilt angle of the first tilted surface is equal to or greater than the tilt angle of the third tilted surface, and the tilt angle of the second tilted surface is equal to or greater than the tilt angle of the fourth tilted surface.

[0019] According to one embodiment of the present invention, the first inclined surface of the first boss has a gradually decreasing inclination angle in the radial direction, and the second inclined surface of the second boss has a gradually decreasing inclination angle in the radial direction.

[0020] According to one embodiment of the present invention, the chuck assembly includes a base, a positioning block, and a telescopic member. The base is provided with a cavity for accommodating the telescopic member. The telescopic member is connected to the gripper. The telescopic member can drive the gripper to move in an axial direction, while the gripper moves in a direction away from or close to the axis of the base. The positioning block is disposed on the upper end face of the base, and the upper end face of the positioning block has a distance from the lower end face of the clamping surface.

[0021] Secondly, the present invention provides a threaded hole machining system, including a drilling device, a threading device, a worktable, a movable base, a chip removal device, an airtight device, and the aforementioned clamping device. The movable base is disposed on the worktable surface and is located below the drilling device and the threading device. The clamping device is disposed on the end face of the movable base. The chip removal device is located on both sides of the clamping device on the end face of the movable base. The airtight device is connected to the clamping device.

[0022] According to one embodiment of the present invention, there are s clamping devices, where s is a natural number, s≥2, and the s clamping devices are arranged side by side on the end face of the movable base.

[0023] According to one embodiment of the present invention, the airtight device includes an airtight hole and a gas control terminal interface communicating with the airtight hole. The airtight hole is formed by opening a through hole in the positioning block in the clamping device. The air intake of the airtight hole is located on the upper end face of the positioning block, and the gas control terminal interface is located on one side of the movable base.

[0024] Thirdly, the present invention provides a method for machining a threaded hole, wherein the method is applied to the aforementioned threaded hole machining system, and the method includes the following steps:

[0025] The clamping device clamps the workpiece and the airtight device pressure is at the preset value. The movable base is moved to the bottom of the drilling device, and the drilling device processes the preset hole in the workpiece. At the same time, the chip removal device flushes the workpiece with water.

[0026] The movable base is moved under the thread processing device, which processes the threads, while the chip removal device flushes the workpiece with water.

[0027] To address the problem of workpiece movement along the clamping surface in the axial direction when subjected to longitudinal forces during threading, this invention offers the following advantages:

[0028] This invention uses the first surface of the first boss as the contact surface between the first boss and the workpiece, and the second surface of the second boss as well as the contact surface between the second boss and the workpiece. Both the first and second surfaces are curved surfaces. When gripping a workpiece, multiple grippers typically work together to clamp the outer periphery of the workpiece, thus achieving clamping. By setting the gripping surfaces of the grippers to be curved, the grippers can adapt to clamping various types of workpieces. The first clamping area is the first force-bearing area, and the second clamping area is the second force-bearing area. The first clamping area with the first force is the primary clamping area, and the second clamping area with the second force is the auxiliary clamping area. This invention improves the clamping effect of the grippers on the workpiece by setting the surface area and the spacing between adjacent boss surfaces according to different force-bearing areas. Attached Figure Description

[0029] Figure 1 A schematic diagram of the clamping device structure according to one embodiment is shown;

[0030] Figure 2 It shows Figure 1 Enlarged schematic diagram of the structure at point A;

[0031] Figure 3 A schematic diagram of the gripper and telescopic component of one embodiment is shown;

[0032] Figure 4 A schematic diagram of a thread hole machining system according to one embodiment is shown;

[0033] Figure 5 A flowchart of a threaded hole machining method according to one embodiment is shown.

[0034] Reference numerals: 10-Clamping device; 11-Claw assembly; 111-Claw; 112-First clamping area; 113-Second clamping area; 114-First boss; 115-First platform; 116-Second boss; 117-Second platform; 118-Groove; 119-Protrusion; 120-Strip groove; 12-Chuck assembly; 121-Base; 122-Positioning block; 123-Telescopic component; 124-Clamping control interface; 20-Worktable; 30-Modible base; 40-Chip removal device; 41-Liquid delivery pipe; 42-Liquid control interface; 50-Airtight device; 51-Airtight hole; 52-Gas control interface; 60-Workpiece. Detailed Implementation

[0035] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0036] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0037] Firstly, this embodiment discloses a clamping device 10, such as... Figure 1-3 As shown, it includes:

[0038] Chuck assembly 12 and gripper 111;

[0039] The grippers 111 and gripper 111 assemblies 111 are circumferentially arranged at equal intervals on the surface of the chuck assembly 12;

[0040] The gripper assembly 111 includes a gripper 111, the gripping surface of which is curved. The gripping surface has a first gripping area 112 and a second gripping area 113. The first gripping area 112 is a first force-bearing area, and the second gripping area 113 is a second force-bearing area. The first force in the first force-bearing area is greater than the second force in the second force-bearing area. The first gripping area 112 has n first protrusions 114, and the second gripping area 113 has m second protrusions 116, where n and m are natural numbers, n>1, m>1. The area of ​​the first platform 115 of a single first protrusion 114 is greater than the area of ​​the second platform 117 of a single second protrusion 116. There is a first spacing between adjacent first platforms 115 and a second spacing between adjacent second platforms 117. The first spacing is less than or equal to the second spacing.

[0041] When machining a threaded hole on workpiece 60 from top to bottom, workpiece 60 needs to be clamped. During the threading process, the tool and workpiece 60 are in contact on only one side, resulting in inconsistent force on workpiece 60. Furthermore, the tool generates axial and radial forces on workpiece 60 during threading. This can cause workpiece 60 to tend to move upward in the axial direction and towards the tool, resulting in a tilted state. Consequently, workpiece 60 exhibits a jumping phenomenon during threading, leading to a reduction in the contact area between workpiece 60 and the clamping jaws 111. This causes deviations in the threading of workpiece 60, increases the defect rate of workpiece 60, and ultimately increases production costs.

[0042] In this embodiment, as Figure 1 As shown, the first platform 115 of the first boss 114 is the contact surface between the first boss 114 and the workpiece 60, and the second platform 117 of the second boss 116 is also the contact surface between the second boss 116 and the workpiece 60. Both the first platform 115 and the second platform 117 are curved surfaces. When the gripper 111 clamps the workpiece 60, multiple grippers 111 cooperate to clamp the outer periphery of the workpiece 60, thereby achieving clamping of the workpiece 60. By setting the clamping surfaces of the grippers 111 as curved surfaces, the grippers 111 can adapt to clamping various types of workpieces 60. The first clamping area 112 is the first force-bearing area, and the second clamping area 113 is the second force-bearing area. The first clamping area 112, which has the first force, serves as the main clamping area, and the second clamping area 113, which has the second force, serves as the auxiliary clamping area.

[0043] In this embodiment, the first clamping area 112 is used as the main clamping area. The area of ​​the first platform 115 of the first boss 114 is set to be larger than the area of ​​the second platform 117 of the second boss 116. This allows the workpiece 60 and the clamping surface of the gripper 111 to have a larger contact release area, ensuring that the first clamping area 112 of the gripper 111 provides basic clamping for the workpiece 60. The way in which n first bosses 114 and m second bosses 116 are arranged alternately allows the workpiece 60 to contact the bosses during processing, generating an interaction force between them. When the workpiece 60 tends to tilt, the bosses undergo slight deformation as the workpiece 60 tilts, allowing the deformation surface of the bosses to adapt to the position of the workpiece 60. This ensures the contact area between the bosses and the workpiece 60, thus ensuring the clamping effect of the gripper 111 on the workpiece 60. In other words, by arranging multiple bosses alternately, the bosses have deformation space.

[0044] This embodiment improves the clamping effect of the gripper 111 on the workpiece 60 by setting the table area and the spacing between adjacent bosses according to different stress areas.

[0045] In this embodiment, the tilt of workpiece 60 refers to the tilt within a preset tilt range that does not affect the qualification standard of the processed workpiece 60. If the tilt of workpiece 60 is too large, workpiece 60 is scrapped and will no longer be processed.

[0046] The model in this article includes, but is not limited to, the dimensions of workpiece 60, such as the outer diameter, width, and length of workpiece 60, which represent the ring diameter formed by the multiple grippers 111 when they clamp workpiece 60.

[0047] Preferably, the first spacing is less than the second spacing.

[0048] According to one embodiment of the present invention, such as Figure 1 and Figure 3 As shown, the first clamping area 112 is close to the center of the clamping surface, and the second clamping area 113 is far from the center of the clamping surface. The area of ​​the first platform 115 of n first protrusions 114 gradually decreases along the direction close to the center of the clamping surface until it reaches a first pre-value range. The area of ​​the second platform 117 of m second protrusions 116 gradually decreases along the direction far from the center of the clamping surface until it reaches a second pre-value range. The minimum value of the first pre-value range is equal to or greater than the maximum value of the second pre-value range.

[0049] In this embodiment, the larger the platform area, the easier it is for the boss to deform. Since the gripper 111 clamps the workpiece 60 through the cooperation of multiple grippers 111, the middle part near the gripper 111 clamping surface is the main clamping area. Therefore, the first force on the first clamping area 112 near the middle of the clamping surface is greater than the second force on the second clamping area 113 far from the middle of the clamping surface. By gradually reducing the surface area of ​​the n first bosses 114 along the direction near the middle of the clamping surface until reaching the first pre-value range, and by ensuring that the minimum value of the first pre-value range is equal to or greater than the maximum value of the second pre-value range, it is possible to ensure that the first bosses 114 provide a basic clamping effect on the workpiece 60 while also ensuring the deformability of the first bosses 114. By setting the area of ​​the second platform 117 of the m second protrusions 116 gradually decreasing along the direction away from the center of the clamping surface until it reaches the second preset value range, the area of ​​the second protrusions 116 gradually decreases while providing auxiliary clamping for the workpiece 60. This ensures that the second protrusions 116 are easy to deform, and also ensures that the gripper 111 can adapt to the clamping of various types of workpieces 60.

[0050] Preferably, the minimum value of the first pre-value range is greater than the maximum value of the second pre-value range.

[0051] According to one embodiment of the present invention, such as Figure 1 and Figure 3 As shown, n first protrusions 114 and m second protrusions 116 are spaced apart by grooves 118, the grooves 118 including U-shaped grooves, V-shaped grooves or dovetail grooves.

[0052] In this embodiment, the bosses are spaced apart by grooves 118 to ensure that the bosses have deformable space, so that when the gripper 111 is clamping the workpiece 60 for processing, the gripper 111 and the workpiece 60 generate an interaction force, increasing the contact area between the gripper 111 and the workpiece 60.

[0053] Preferably, the groove 118 is a V-shaped groove.

[0054] According to one embodiment of the present invention, the first spacing between adjacent first platform 115 in the axial direction is the same as or different from the first spacing between adjacent first platform 115 in the radial direction; the second spacing between adjacent second platform 117 in the axial direction is the same as or different from the second spacing between adjacent second platform 117 in the radial direction.

[0055] In the first clamping area 112, the area of ​​the first platform 115 of the first boss 114 near the chuck assembly 12 is larger than the area of ​​the first platform 115 of the first boss 114 away from the chuck assembly 12.

[0056] In the second clamping area 113, the area of ​​the second platform 117 of the second boss 116 near the chuck assembly 12 is larger than the area of ​​the second platform 117 of the second boss 116 away from the chuck assembly 12.

[0057] In this embodiment, when the cutting tool creates a threaded hole in the workpiece 60 with the opening facing away from the gripper 111, the gripper 111 clamps the workpiece 60 peripherally. Due to the tool's feed method for machining the threaded hole in the workpiece 60, forces are generated between the workpiece 60 and the gripper 111 in both axial and radial directions. Therefore, an appropriate spacing can be selected based on the magnitude of the axial and radial forces acting on the gripper 111. The spacing between the platforms is larger in the direction of greater force, and vice versa. By increasing the spacing between the platforms in the direction of greater force, the deformable space of the boss is ensured.

[0058] The arrangement that the area of ​​the first platform 115 of the first boss 114 near the chuck assembly 12 is larger than the area of ​​the first platform 115 of the first boss 114 away from the chuck assembly 12, and that the area of ​​the first platform 115 of the first boss 114 near the chuck assembly 12 is larger than the area of ​​the first platform 115 of the first boss 114 away from the chuck assembly 12, further ensures the basic clamping capacity of the first clamping area 112 and the second clamping area 113.

[0059] Preferably, the first distance between adjacent first table surfaces 115 along the axial direction is smaller than the first distance between adjacent first table surfaces 115 along the radial direction; the second distance between adjacent second table surfaces 117 along the axial direction is smaller than the second distance between adjacent second table surfaces 117 along the radial direction. Since the gripper 111 clamps the workpiece 60 peripherally, and since the tool exerts a greater force on the workpiece 60 in the direction away from the gripper 111 when machining the threaded hole in the workpiece 60 away from the gripper 111, the setting of the distance between adjacent table surfaces along the axial direction being smaller than the distance between adjacent table surfaces along the radial direction ensures the deformable space of the boss.

[0060] In some embodiments, the first spacing is the spacing between adjacent first tabletops 115, and the second spacing is the spacing between adjacent second tabletops 117; such as Figure 3 As shown, the first spacing is 3.5-4.5cm, the second spacing is 3.5-4.5cm, the height of the first boss 114 is 3.5-4.5cm, and the height of the second boss 116 is 3.5-4.5cm; the area of ​​the first platform 115 of the first boss 114, which is away from the chuck assembly 12, is 16-18mm². 2 The second platform 117, located away from the second boss 116 of the chuck assembly 12, has an area of ​​5-7 mm. 2 .

[0061] Preferably, the area of ​​the first platform 115 of the first boss 114 near the chuck assembly 12 is ≥1.5 * the area of ​​the first platform 115 of the first boss 114 away from the chuck assembly 12; the area of ​​the second platform 117 of the second boss 116 near the chuck assembly 12 is ≥1.5 * the area of ​​the second platform 117 of the second boss 116 away from the chuck assembly 12.

[0062] According to one embodiment of the present invention, among n first platform surfaces 115 along the same axial or radial direction, the first spacing between adjacent first platform surfaces 115 may be the same or different.

[0063] Among the m second platforms 117 along the same axial or radial direction, the second spacing between adjacent second platforms 117 may be the same or different.

[0064] In this embodiment, among multiple platforms along the same axial or radial direction, the spacing between adjacent platforms can be set differently according to the different force points generated by the clamping surfaces of the workpiece 60 and the grippers 111, thereby improving the clamping effect of the grippers 111.

[0065] Preferably, the closer the platform is to the larger the stress area, the greater the distance between adjacent platforms.

[0066] According to one embodiment of the present invention, the first boss 114 has a first deformation coefficient, and the second boss 116 has a second deformation coefficient, wherein the first deformation coefficient is smaller than the second deformation coefficient.

[0067] In this embodiment, since the first clamping area 112 is the main area providing clamping force, it is necessary to ensure that the first boss 114 of the first clamping area 112 itself has a sufficient contact area with the workpiece 60. Furthermore, when the gripper 111 is subjected to excessive force generated during the processing of the workpiece 60, the first boss 114 can still undergo slight deformation to ensure that the gripper 111 has more contact surface with the workpiece 60, thus ensuring a clamping effect. The second boss 116 serves as an auxiliary clamping element, and its deformation coefficient can be set to be larger to better provide an auxiliary clamping effect.

[0068] According to one embodiment of the present invention, such as Figure 1 and Figure 3 As shown, the first boss 114 has a first inclined surface in the upward direction along the axial direction, and the second boss 116 has a second inclined surface. In the downward direction along the axial direction, the first boss 114 has a third inclined surface, and the second boss 116 has a fourth inclined surface. The inclination angle of the first inclined surface is smaller than that of the second inclined surface, and the inclination angle of the third inclined surface is smaller than that of the fourth inclined surface.

[0069] In this embodiment, the tilting direction of the tilting surface of a single boss is tilted towards the center of the boss. The larger the tilting angle of the tilting surface of the boss, the easier the boss is to deform.

[0070] According to one embodiment of the present invention, the tilt angle of the first tilted surface is equal to or greater than the tilt angle of the third tilted surface, and the tilt angle of the second tilted surface is equal to or greater than the tilt angle of the fourth tilted surface.

[0071] In this embodiment, the first boss 114 is ensured to provide the main clamping force for the workpiece 60.

[0072] According to one embodiment of the present invention, the first inclined surface of the first boss 114 gradually decreases in the radial direction at an angle that is gradually decreasing, and the second inclined surface of the second boss 116 gradually decreases in the radial direction at an angle that is gradually decreasing.

[0073] In this embodiment, while ensuring the deformability of the boss, the basic clamping effect of the boss itself is also guaranteed.

[0074] According to one embodiment of the present invention, such as Figure 1-3 As shown, the chuck assembly 12 includes a base 121, a positioning block 122, and a telescopic member 123. The base 121 has a cavity for accommodating the telescopic member 123. The telescopic member 123 is connected to the gripper 111. The telescopic member 123 can drive the gripper 111 to move in the axial direction. At the same time, the gripper 111 moves in a direction away from or close to the axis of the base 121. The positioning block 122 is disposed on the upper end surface of the base 121. The upper end surface of the positioning block 122 has a distance from the lower end surface of the clamping surface.

[0075] In this embodiment, at least three grippers 111 are provided. The number of telescopic members 123 is the same as the number of grippers 111. The positioning block 122 is located between two adjacent grippers 111. The workpiece 60 is placed on the positioning block 122. The telescopic members 123 drive the grippers 111 to move along the axis near the base 121 until the grippers 111 abut against the workpiece 60. The three grippers 111 cooperate to clamp the workpiece 60.

[0076] Preferably, the individual grippers 111 are evenly spaced to provide a balanced gripping effect for the workpiece 60.

[0077] Preferably, the telescopic member 123 is fluid-driven, specifically hydraulically driven.

[0078] Preferably, the telescopic member 123 includes a hydraulic cylinder and a piston connected thereto, the hydraulic cylinder being disposed in the cavity, and the piston being connected to the gripper 111.

[0079] Preferably, the gripper 111 is provided with a protrusion 119 for connecting to the piston, and the protrusion 119 is provided with a connecting hole for connecting the bolt to the piston. The gripper 111 has a strip groove 120 extending in the axial direction in the middle, and the connecting hole communicates with the strip groove 120. The strip groove 120 facilitates the bolt to enter the connecting hole from the strip groove 120, while also ensuring the structural reliability of the gripper 111.

[0080] Secondly, such as Figure 4 As shown, the present invention provides a threaded hole machining system, including a drilling device, a threading device, a worktable 20, a movable base 30, a chip removal device 40, an airtight device 50, and the aforementioned clamping device 10. The movable base 30 is disposed on the table surface of the worktable 20 and is located below the drilling device and the threading device. The clamping device 10 is disposed on the end face of the movable base 30. The chip removal device 40 is located on both sides of the clamping device 10 and disposed on the end face of the movable base 30. The airtight device 50 is connected to the clamping device 10.

[0081] In this embodiment, the drilling device drills holes in the workpiece 60, and the threading device processes threads into the drilled holes. The movable base 30 can move the workpiece 60 to the drilling device and the threading device for processing. The chip removal device 40 washes away the iron chips generated during the processing of the workpiece 60 to ensure a clean processing environment and to prevent the iron chips from affecting the gripper 111's ability to hold the workpiece 60.

[0082] Preferably, the movable base 30 is slidably or rollably connected to the worktable 20, and the movable base 30 can slide or roll back and forth relative to the worktable 20.

[0083] According to one embodiment of the present invention, there are s clamping devices 10, where s is a natural number, s≥2, and the s clamping devices 10 are arranged side by side on the end face of the movable base 30.

[0084] In this embodiment, the number of clamping devices 10 can be set according to requirements. When set to 2, one clamping device 10 clamps the workpiece 60 to be punched, and the other clamping device 10 clamps the workpiece 60 to be processed with threads, so as to improve work efficiency.

[0085] According to one embodiment of the present invention, such as Figure 1 , 2 As shown in Figure 4, the airtight device 50 includes an airtight hole 51 and a gas control terminal interface 52 communicating with the airtight hole 51. The airtight hole 51 is formed by opening a through hole in the positioning block 122 in the clamping device 10. The air intake of the airtight hole 51 is located on the upper end face of the positioning block 122. The gas control terminal interface 52 is located on one side of the movable base 30.

[0086] Preferably, the claw assembly further includes a clamping control terminal 124 interface, which is connected to the telescopic member 123 and is located on one side of the movable base 30.

[0087] Preferably, the chip removal device 40 includes a liquid delivery pipe 41 and a liquid control terminal 42 interface. The liquid delivery pipe 41 is located on the movable base 30 on both sides of the clamping device 10, the liquid delivery is located on one side of the movable base 30, and the liquid control terminal 42 interface is connected to the liquid delivery pipe 41.

[0088] In this embodiment, the airtight device 50 ensures reliable positioning of the workpiece 60 during processing and effectively separates iron filings, preventing secondary processing from affecting product positioning. This reduces the scrap rate, improves processing efficiency, and ensures that processing requirements are met.

[0089] The threaded hole machining system in this embodiment includes, but is not limited to, machining threaded holes on bell-shaped shells.

[0090] Thirdly, such as Figure 5 As shown, the present invention provides a threaded hole machining method, which is applied to the aforementioned threaded hole machining system. The threaded hole machining method includes the following steps:

[0091] The clamping device 10 clamps the workpiece 60 and the pressure of the airtight device 50 is at a preset value. The movable base 30 is moved to the bottom of the drilling device. The drilling device processes the preset hole in the workpiece 60. At the same time, the chip removal device 40 flushes the workpiece 60 with water.

[0092] The movable base 30 is moved to the bottom of the thread processing device, which processes the threads, while the chip removal device 40 flushes the workpiece 60 with water.

[0093] In this embodiment, the workpiece 60 is placed on the positioning block 122 of the first clamping device 10 and clamped by the jaws 111. The airtight control terminal detects whether the workpiece 60 is properly positioned and whether it is tilted. If the workpiece 60 is not properly positioned, the airtight control terminal alarms. Subsequent processing is performed only after the workpiece 60 is properly positioned. When drilling the workpiece 60, water is flushed through the chip removal device 40 to remove the generated iron filings, preventing improper positioning during subsequent processing. After processing, the airtight control terminal continuously blows air to remove the iron filings generated during the previous processing. After drilling is completed, the workpiece 60 is placed in the second clamping device 10, and then subsequent threading is performed.

[0094] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A clamping device, characterized in that, include: Chuck assembly and gripper assembly; The gripper assemblies are circumferentially arranged at equal intervals on the surface of the chuck assembly; The gripper assembly includes grippers with a curved gripping surface. The gripping surface has a first gripping area and a second gripping area. The first gripping area is a first force-bearing area, and the second gripping area is a second force-bearing area. The first force in the first force-bearing area is greater than the second force in the second force-bearing area. The first gripping area has n first protrusions, and the second gripping area has m second protrusions, where n and m are natural numbers, n > 1, m > 1. The area of ​​the first surface of a single first protrusion is greater than the area of ​​the second surface of a single second protrusion. There is a first spacing between adjacent first surfaces and a second spacing between adjacent second surfaces, where the first spacing is less than or equal to the second spacing.

2. The clamping device according to claim 1, characterized in that, The first clamping area is close to the center of the clamping surface, and the second clamping area is far from the center of the clamping surface. The area of ​​the first platform of n first protrusions along the direction close to the center of the clamping surface gradually decreases until it reaches a first pre-value range. The area of ​​the second platform of m second protrusions along the direction far from the center of the clamping surface gradually decreases until it reaches a second pre-value range. The minimum value of the first pre-value range is equal to or greater than the maximum value of the second pre-value range.

3. The clamping device according to claim 2, characterized in that, The n first bosses and m second bosses are spaced apart by grooves, the grooves including U-shaped grooves, V-shaped grooves or dovetail grooves.

4. The clamping device according to claim 1, characterized in that, The first spacing between adjacent first platform surfaces along the axial direction is the same as or different from the first spacing between adjacent first platform surfaces along the radial direction; The second spacing between adjacent second platform surfaces along the axial direction may be the same as or different from the second spacing between adjacent second platform surfaces along the radial direction. In the first clamping area, the area of ​​the first platform of the first boss near the chuck assembly is greater than the area of ​​the first platform of the first boss away from the chuck assembly. In the second clamping region, the area of ​​the second platform of the second boss near the chuck assembly is larger than the area of ​​the second platform of the second boss away from the chuck assembly.

5. A clamping device according to claim 4, characterized in that, Among n first platforms along the same axial or radial direction, the first spacing between adjacent first platforms may be the same or different. Among the m second platforms along the same axial or radial direction, the second spacing between adjacent second platforms may be the same or different.

6. A clamping device according to claim 1, characterized in that, The first boss has a first deformation coefficient, and the second boss has a second deformation coefficient, wherein the first deformation coefficient is smaller than the second deformation coefficient.

7. A clamping device according to claim 1, characterized in that, The first boss has a first inclined surface in the upward direction along the axial direction, the second boss has a second inclined surface, the first boss has a third inclined surface in the downward direction along the axial direction, and the second boss has a fourth inclined surface. The inclination angle of the first inclined surface is smaller than the inclination angle of the second inclined surface, and the inclination angle of the third inclined surface is smaller than the inclination angle of the fourth inclined surface.

8. A clamping device according to claim 7, characterized in that, The tilt angle of the first tilted surface is equal to or greater than the tilt angle of the third tilted surface, and the tilt angle of the second tilted surface is equal to or greater than the tilt angle of the fourth tilted surface.

9. A clamping device according to claim 7, characterized in that, The first inclined surface of the first boss gradually decreases in inclination angle along the radial direction, and the second inclined surface of the second boss gradually decreases in inclination angle along the radial direction.

10. A clamping device according to claim 1, characterized in that, The chuck assembly includes a base, a positioning block, and a telescopic component. The base has a cavity for accommodating the telescopic component. The telescopic component is connected to the gripper. The telescopic component can drive the gripper to move in the axial direction. At the same time, the gripper moves in a direction away from or close to the axis of the base. The positioning block is located on the upper end face of the base. The upper end face of the positioning block has a distance from the lower end face of the clamping surface.

11. A threaded hole machining system, characterized in that, The device includes a drilling device, a thread processing device, a worktable, a movable base, a chip removal device, an airtight device, and a clamping device as described in any one of claims 1-10. The movable base is disposed on the worktable surface and is located below the drilling device and the thread processing device. The clamping device is disposed on the end face of the movable base. The chip removal device is located on both sides of the clamping device on the end face of the movable base. The airtight device is connected to the clamping device.

12. A threaded hole machining system according to claim 11, characterized in that, The clamping device has s units, where s is a natural number and s ≥ 2. The s clamping devices are arranged side by side on the end face of the movable base.

13. A threaded hole machining system according to claim 11, characterized in that, The airtight device includes an airtight hole and a gas control terminal interface communicating with the airtight hole. The airtight hole is formed by opening a through hole in the positioning block in the clamping device. The air intake of the airtight hole is located on the upper end face of the positioning block, and the gas control terminal interface is located on one side of the movable base.

14. A method for machining threaded holes, characterized in that, The threaded hole machining method is applied to the threaded hole machining system according to any one of claims 11-13, and the threaded hole machining method includes the following steps: The clamping device clamps the workpiece and the airtight device pressure is at the preset value. The movable base is moved to the bottom of the drilling device, and the drilling device processes the preset hole in the workpiece. At the same time, the chip removal device flushes the workpiece with water. The movable base is moved under the thread processing device, which processes the threads, while the chip removal device flushes the workpiece with water.

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