Workpiece machining clamping fixture
By combining the design of the base, support structure and clamping components, the problem of existing fixtures being unable to maintain the verticality of vertically placed workpieces is solved, achieving stable clamping and convenient operation of workpieces, and improving processing accuracy and adaptability.
Patent Information
- Application Number
- CN202511956187.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-02-27
AI Technical Summary
Existing fixtures are ineffective at maintaining the verticality and stability of vertically placed workpieces during processing, especially for thin-walled LED cabinet structures.
The design adopts a combination of base, support structure and clamping assembly. The clamping assembly includes a through sleeve, telescopic power and pressure head. The telescopic power drives the state switching of the connecting column and the pressure head to realize the rapid clamping and release of the workpiece. The verticality and stability of the workpiece are maintained by the synergistic effect of the support structure and the clamping assembly.
It improves the verticality and stability of the workpiece during processing, enhances the reliability and convenience of clamping, adapts to the clamping requirements of workpieces of different sizes, and improves processing accuracy and efficiency.
Smart Images
Figure CN121572031A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of machining fixtures, and in particular to a workpiece machining clamping fixture. Background Technology
[0002] Currently, the base or related sheet metal parts of LED display cabinets need to be processed using CNC machining centers, and the workpieces are usually held by general-purpose fixtures or customized fixtures.
[0003] While general-purpose clamps such as flat-jaw pliers and magnetic chucks are widely adaptable, they are difficult to meet the clamping requirements of the thin-walled structure of LED cabinets, which are prone to deformation.
[0004] Current clamping solutions primarily involve using the output ends of multiple cylinders to press against the side of the workpiece, thus clamping it together. However, when machining longer workpieces, which are often placed vertically, the aforementioned clamping method struggles to maintain the workpiece's verticality, resulting in poor clamping performance. Summary of the Invention
[0005] To improve the clamping effect on vertically placed workpieces, this application provides a workpiece processing clamping fixture.
[0006] This application provides a workpiece machining clamping fixture, which adopts the following technical solution: A workpiece machining clamping fixture includes: a base, a support structure, and clamping components; the base extends vertically, and the support structure is mounted on the base; multiple sets of clamping components are distributed on the base, and the mounting positions of each set of clamping components correspond to mounting holes on the workpiece; each set of clamping components includes... An assembly base, mounted on the base, has a through sleeve for sliding through the workpiece mounting hole; The telescopic power is installed on the base; A connecting post is connected to the telescopic end of the telescopic force and slides through the connecting sleeve; and The pressing head is movable on the periphery of the end of the connecting post away from the base and located in the external environment of the through sleeve. The pressing head has a first state and a second state. The first state is characterized by the pressing head being close to the connecting post, at which time the pressing head and the connecting post can pass through the workpiece mounting hole together. The second state is characterized by the pressing head being away from the connecting post, at which time the cross-sectional dimension of the pressing head and the connecting post is larger than the size of the workpiece mounting hole. When the telescopic power extension end extends, the pressure head is in the first state, at which time the workpiece can be fitted onto the through sleeve through its own mounting hole; when the telescopic power extension end retracts, the pressure head moves to the second state, so that the workpiece is clamped between the pressure head and the support structure.
[0007] By adopting the above technical solution, the clamping assembly engages with the workpiece's mounting hole via a through-sleeve, utilizing telescopic power to drive the connecting column and the pressure head to achieve rapid clamping and release of the workpiece. The switching between the first and second states of the pressure head allows the workpiece to be easily inserted and firmly clamped, and the synergistic effect of the support structure and the clamping assembly ensures the verticality and stability of the workpiece during vertical processing.
[0008] Optionally, the pressing head includes a sliding part and a pressing part connected together. The sliding part slides radially along the connecting post on the periphery of the connecting post, and the pressing part is opposite to the periphery of the connecting post. The connecting post magnetically attracts the sliding part to drive the pressing head to move closer to the connecting post. The end of the connecting sleeve near the pressing head has a slope, which is used to guide the pressing part; when the pressing head moves relative to the connecting sleeve toward the base, the pressing head moves from the first state to the second state through the slope.
[0009] By adopting the above technical solution, the sliding part of the pressure head and the magnetic attraction work together to achieve the automatic reset function. The slope guide of the through sleeve allows the pressure head to smoothly transition to the second state during movement, which enhances the reliability of clamping, reduces manual intervention, and improves the convenience of workpiece placement and installation.
[0010] Optionally, at least one set of the pressing head is provided on the connecting column. When there are multiple sets of the pressing head, the multiple sets of the pressing head are distributed circumferentially along the connecting column.
[0011] By adopting the above technical solution, multiple sets of pressure heads are distributed circumferentially along the connecting column, which can evenly distribute the clamping force and avoid excessive local force on the workpiece, thus preventing deformation.
[0012] Optionally, the through sleeve slides in the mounting base, the outer periphery of the through sleeve protrudes with a first travel portion, and the mounting base has a first travel groove for the first travel portion to slide in; the inner periphery of the through sleeve protrudes with a second travel portion, and the connecting post has a second travel groove for the second travel portion to slide in, and the sliding directions of the first travel portion and the second travel portion are parallel. When the telescopic end of the telescopic power extends, the connecting column pushes the second stroke portion to move, thereby causing the through sleeve and the workpiece on the through sleeve to move away from the base, so that a gap is left between the workpiece and the support structure.
[0013] By adopting the above technical solution, the double sliding of the through sleeve and the connecting column allows the workpiece to move away from the base when it is finished, so that there is a gap between the support structure and the workpiece, which makes it easier for the robot or personnel to handle the workpiece.
[0014] Optionally, a collar is provided around the outer periphery of the through sleeve. When the telescopic end of the telescopic power is extended, the through sleeve abuts against the workpiece through the collar, thereby pushing the workpiece to move away from the base.
[0015] By adopting the above technical solution, the collar can assist in pushing the workpiece, ensuring that the workpiece moves away from the supporting structure during the extension of the telescopic power end.
[0016] Optionally, the support structure includes a support frame that extends along the periphery of the base for supporting the periphery of the workpiece.
[0017] Optionally, the support structure includes multiple fulcrum members, which are spaced apart on the base.
[0018] By adopting the above technical solution, the multi-point support design of the fulcrum component further enhances the stability of the workpiece, and is especially suitable for workpieces with complex shapes or uneven weight distribution.
[0019] Optionally, both the fulcrum and the telescopic force are mounted on the base via an adjustment assembly, the adjustment assembly including... Mounting bracket, installed on the base; The first adjustment seat is installed on the mounting base and extends along a straight line. The second adjusting seat is adjusted and moved on the first adjusting seat along the length extension direction of the first adjusting seat, while the length of the second adjusting seat extends along a direction perpendicular to the length of the first adjusting seat. The third adjusting seat is adjustable and movable on the second adjusting seat along the length extension direction of the second adjusting seat; and The mating seat is fixed to the fulcrum and the telescopic power respectively, and is detachably connected to the third adjustment seat.
[0020] By adopting the above technical solution, the multi-level adjustment function of the adjustment component realizes the precise positioning of the fulcrum and the telescopic force, meeting the clamping requirements of workpieces of different sizes.
[0021] Optionally, the base is provided with arrayed connection holes, and the mounting base is detachably installed to the connection holes by bolts.
[0022] By adopting the above technical solution, the array of connecting holes on the base enables modular expansion of the fixture, allowing users to flexibly configure clamping and support points as needed. This enhances the adaptability and scalability of the fixture, making it suitable for diverse production requirements.
[0023] Optionally, the base has a rotating part in the middle for mounting the rotating shaft.
[0024] By adopting the above technical solution, the rotating part, in cooperation with the rotating shaft, enables the fixture to rotate, thereby improving the efficiency and convenience of workpiece processing.
[0025] In summary, this application includes at least one of the following beneficial effects: 1. Through the synergistic effect of the support structure and clamping components, the workpiece is kept vertical during processing, making it less prone to displacement or vibration, thereby improving processing accuracy; 2. Through the combination of multi-level adjustment components and modular connection holes, it can adapt to workpieces of different sizes, thus enhancing the versatility of the fixture. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of the fixture and the workpiece in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the exploded structure of the fixture and workpiece in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the fixture in Embodiment 1 of this application; Figure 4 This is a schematic diagram of the air-float support cylinder in Embodiment 1 of this application; Figure 5 yes Figure 1 The left view; Figure 6 yes Figure 1 Enlarged structural diagram at point A; Figure 7 This is a cross-sectional view of the clamping assembly and the workpiece when the telescopic power telescopic end retracts in Embodiment 1 of this application; Figure 8 yes Figure 7 Enlarged structural view at point B; Figure 9 This is a cross-sectional view of the clamping assembly and the workpiece when the telescopic power telescopic end extends out in Embodiment 1 of this application; Figure 10 This is a cross-sectional view of the clamping assembly and the workpiece when the telescopic power telescopic end is fully extended in Embodiment 1 of this application; Figure 11 This is a schematic diagram of the structure of Embodiment 2 of this application; Figure 12 yes Figure 11 Sectional view at CC; Figure 13 This is a schematic diagram of the adjustment component in Embodiment 2 of this application.
[0027] Explanation of reference numerals in the attached drawings: 1. Base; 2. Support structure; 201. Support frame; 202. Support element; 3. Assembly seat; 4. Through sleeve; 41. Same diameter section; 42. Reduced diameter section; 5. Telescopic power; 6. Connecting column; 7. Pressing head; 71. Sliding part; 711. Connecting section; 712. Limiting section; 72. Pressing part; 8. Slope; 9. First stroke section; 10. First stroke groove; 11. Second stroke section; 12. Second stroke groove; 13. Collar; 14. Mounting seat; 15. First adjusting seat; 151. Horizontal screw; 16. Second adjusting seat; 161. Vertical screw; 17. Third adjusting seat; 171. Abutment seat; 18. Mating seat; 19. Connecting hole; 20. Rotating part; 21. Receiving groove; 22. Sliding seat; 23. Insertion block; 24. Slot; 25. Workpiece; 26. Mounting hole. Detailed Implementation
[0028] The following is in conjunction with the appendix Figure 1 To be continued Figure 13 This application will be described in further detail.
[0029] Example 1:
[0030] This application discloses a workpiece machining clamping fixture. (Refer to...) Figure 1 and Figure 2 The workpiece machining clamping fixture includes a base 1, a support structure 2, and clamping components. The base 1 is a square plate with a vertical surface. The support structure 2 is mounted on the base 1 to support the vertically placed workpiece 25, keeping it in a vertical position. Multiple clamping components are distributed and mounted on the base 1. The workpiece 25 has multiple mounting holes 26, and the mounting positions of each clamping component correspond to the positions of the mounting holes 26 on the workpiece 25. The clamping components engage with the workpiece 25 through the mounting holes 26 to pull the workpiece 25 against the support structure 2, so that the support structure 2 and the clamping components together clamp the workpiece 25, thereby maintaining a stable vertical position for the workpiece 25 during machining.
[0031] Reference Figure 1 and Figure 3The support structure 2 includes a support frame 201 and a fulcrum 202. The support frame 201 is fixed to the base 1 and is a square frame extending around the base 1. The size of the support frame 201 is adapted to the size of the workpiece 25 and is used to support the periphery of the workpiece 25 away from the machining surface.
[0032] Reference Figure 3 Multiple support members 202 are provided, and these support members 202 are fixedly installed on the base 1 at intervals by bolts or welding. In this embodiment, the support members 202 have a columnar structure, and the length direction of the support members 202 is perpendicular to the plate surface of the base 1. (Refer to...) Figure 4 In other embodiments, the fulcrum 202 can also be an air-floating support cylinder, whose telescopic end can provide support after the workpiece 25 is adjusted to a different position due to deformation. When the workpiece 25 simultaneously abuts against the support frame 201 and the fulcrum 202, it remains in a vertical state.
[0033] Reference Figure 3 , Figure 5 and Figure 6 For the clamping components, each clamping component includes a mounting base 3, a telescopic power unit 5, a connecting column 6, and a pressing head 7.
[0034] Reference Figure 6 , Figure 7 and Figure 8 Specifically, the mounting base 3 has an L-shaped structure and is fixedly installed on the base 1 by bolts or welding. The mounting base 3 is provided with a through sleeve 4. The through sleeve 4 includes an integrally formed section 41 of the same diameter and a section 42 of reduced diameter. The section 41 of the same diameter is cylindrical, and its outer diameter is consistent with the inner diameter of the mounting hole 26. One end of the section 41 of the same diameter is installed in the mounting base 3. The section 42 of reduced diameter is a conical tube coaxial with the section 41 of the same diameter and is located at the end of the section 41 of the same diameter away from the base 1. The outer diameter of the section 42 of reduced diameter is consistent with the outer diameter of the section 41 of the same diameter. The outer diameter of the end of the section 42 of reduced diameter away from the section 41 of the same diameter is consistent with its own inner diameter, so that the outer periphery of the section 42 of reduced diameter forms an inclined slope 8. The inner diameters of the section 42 of reduced diameter and the section 41 of the same diameter are consistent along their own axial direction.
[0035] The telescopic power unit 5 is fixed to the base 1 by bolts or welding, and the telescopic power unit 5 is located within the space enclosed by the mounting base 3. The telescopic end of the telescopic power unit 5 extends and retracts along the direction perpendicular to the surface of the base 1. It should be noted that the through sleeve 4 corresponds one-to-one with the telescopic power unit 5. The telescopic power unit 5 can be a cylinder, an electric telescopic rod, etc., and a cylinder is preferred in this embodiment.
[0036] The connecting post 6 is a cylindrical shaft with an outer diameter that matches the inner diameter of the through sleeve 4. The connecting post 6 corresponds one-to-one with the telescopic power 5, and the connecting post 6 also corresponds one-to-one with the through sleeve 4. One end of the connecting post 6 is coaxially fixed to the telescopic end of the corresponding telescopic power 5, and the connecting post 6 slides coaxially through the corresponding through sleeve 4. The end of the connecting post 6 away from the base 1 extends out of the through sleeve 4.
[0037] Reference Figure 6 , Figure 7 and Figure 8 The pressing head 7 is movably connected to the end of the connecting post 6 away from the base 1 and extending out of the through sleeve 4. Each connecting post 6 corresponds to at least one set of pressing heads 7. In this embodiment, each connecting post 6 corresponds to four sets of pressing heads 7, and the four sets of pressing heads 7 are evenly spaced along the circumference of the connecting post 6. Each set of pressing heads 7 includes a sliding part 71 and a pressing part 72. The sliding part 71 includes a connecting section 711 and a limiting section 712 that are fixedly connected in sequence along the radial direction of the pressing head 7. The connecting section 711 is in the shape of a circular shaft, and the limiting section 712 is in the shape of a square block. The connecting section 711 is fixed between the pressing part 72 and the limiting section 712, and the cross-section of the limiting section 712 is larger than the cross-section of the connecting section 711. The groove in the connecting post 6 for the limiting section 712 to slide does not penetrate the outer circumference of the connecting post 6 to restrict the pressing head 7 from detaching from the connecting post 6. The pressing part 72 is in the shape of an arc plate. The axis of the pressing part 72 is parallel to the axis of the connecting column 6, and the inner diameter of the pressing part 72 is the same as the outer diameter of the connecting column 6. The outer diameter of the pressing part 72 is the same as the outer diameter of the through sleeve 4, and the outer periphery of the pressing part 72 away from the base 1 gradually narrows in diameter along the direction away from the base 1. In order to facilitate the assembly of the pressing head 7, the connecting column 6 is formed by segment splicing.
[0038] When the pressing head 7 moves radially along the connecting post 6, it has a first state and a second state. In the first state, the inner circumference of the pressing part 72 fits against the outer circumference of the connecting post 6. At this time, the common cross-sectional dimension of the pressing head 7 and the connecting post 6 is approximately equal to the size of the mounting hole 26 of the workpiece 25, allowing the pressing head 7 and the connecting post 6 to pass through the mounting hole 26 of the workpiece 25 together. In the second state, the pressing part 72 moves away from the connecting post 6. At this time, the space between the inner circumference of the pressing part 72 and the outer circumference of the connecting post 6 allows the corresponding part of the through sleeve 4 to enter, and the common cross-sectional dimension of the pressing head 7 and the connecting post 6 is larger than the size of the mounting hole 26.
[0039] It should be noted that a magnet is embedded in the center of the connecting post 6, which is opposite to the limiting section 712. The limiting section 712 is made of metal that can be attracted by the magnet, so that the pressing head 7, without the action of any external force, is attracted by the magnet and moves towards the central axis of the connecting post 6, so that the pressing head 7 is kept in the first state.
[0040] Reference Figure 8 , Figure 9 and Figure 10When in use, the clamping assembly switches the state of the pressing head 7 by extending and retracting the telescopic end of the telescopic power 5, thereby clamping the workpiece 25. Specifically, before the workpiece 25 is assembled onto the fixture, the telescopic ends of the telescopic power 5 in all clamping assemblies extend out. At this time, the end of the through sleeve 4 away from the base 1 extends out of the support frame 201, and the pressing head 7 is in the first state. In this state, the workpiece 25 is positioned opposite the base 1, so that the mounting holes 26 of the workpiece 25 correspond one-to-one with the connecting posts 6. Then, the workpiece 25 is moved closer to the base 1, so that the connecting posts 6 and the pressing head 7 pass through the mounting holes 26 together through the workpiece 25, so that the workpiece 25 is simultaneously fitted onto the same diameter section 41 of each through sleeve 4 and abuts against the support frame 201, thereby restricting the relative movement of the workpiece 25 relative to the base 1 in the vertical direction.
[0041] Subsequently, the telescopic ends of all clamping components telescopic power 5 are retracted, causing the connecting column 6 and the pressing head 7 to move closer to the base 1. During this process, the pressing part 72 is guided by the slope 8 of the through sleeve 4 to drive the pressing head 7 to move radially along the connecting column 6. The pressing part 72 gradually moves away from the outer periphery of the connecting column 6 to the second state. At the same time, the end of the pressing part 72 near the base 1 abuts against the machined surface of the workpiece 25, so that the workpiece 25 is clamped between the support structure 2 and the pressing part 72, thereby fixing the workpiece 25.
[0042] After the workpiece 25 is processed, the telescopic end of the clamping assembly telescopic power 5 extends again, causing the pressing head 7 to move back to the first state. At this time, the workpiece 25 can be removed manually or by a robot.
[0043] Reference Figure 7 , Figure 9 and Figure 10 Furthermore, the through sleeve 4 slides within the mounting base 3. A first stroke portion 9 protruding outwards is fixed to the outer periphery of the through sleeve 4, and a second stroke portion 11 protruding inwards is fixed to the inner periphery of the through sleeve 4. The first stroke portion 9 and the second stroke portion 11 can be cylindrical or block-shaped. A first stroke groove 10 for sliding of the first stroke portion 9 is formed along the axial direction parallel to the through sleeve 4 on the inner periphery of the mounting base 3, and a second stroke groove 12 for sliding of the second stroke portion 11 is formed along the axial direction parallel to the through sleeve 4 on the outer periphery of the connecting column 6. Simultaneously, a collar 13 is coaxially threaded onto the same diameter section 41 of the through sleeve 4. A receiving groove 21 for accommodating the collar 13 is formed on the side of the mounting base 3 opposite to the base 1. The position of the collar 13 on the through sleeve 4 is adjusted according to the thickness of the workpiece 25, so that when the workpiece 25 is clamped between the support structure 2 and the abutment portion, it is simultaneously clamped between the collar 13 and the abutment portion.
[0044] When the telescopic end of the telescopic power 5 is in the retracted state, the first stroke portion 9 abuts against the end of the first stroke groove 10 near the telescopic power 5, and the second stroke portion 11 is at a distance from both ends of the second stroke groove 12. The distance between the second stroke portion 11 and the end of the second stroke groove 12 away from the telescopic power 5 is greater than or equal to the distance between the connecting section 711 and the processing surface of the workpiece 25, so that the telescopic end of the telescopic power 5 can clamp workpieces 25 of different thicknesses by adjusting the retraction distance.
[0045] When the telescopic end of the telescopic power 5 extends, it first drives the connecting column 6 to move away from the base 1, causing the pressing head 7 to leave the through sleeve 4 and return to the first state. Subsequently, the end of the second stroke groove 12 near the telescopic power 5 abuts against the second stroke section 11, and the telescopic end of the telescopic power 5 continues to extend. The connecting column 6, by pushing the second stroke section 11, drives the through sleeve 4 and the collar 13 to move away from the base 1, causing the collar 13 to push the workpiece 25 away from the base 1 and away from the support structure 2. When the telescopic end of the telescopic power 5 is fully extended, a gap is left between the workpiece 25 and the support structure 2, so that the workpiece 25 can be handled or unloaded by a robot or manually. Moreover, the workpiece 25, which is suspended relative to the support structure 2, can dissipate heat and release thermal stress more quickly.
[0046] Reference Figure 3 Furthermore, the base 1 has a rotating part 20 in the middle for mounting the rotating shaft, and the rotating part 20 is hole-shaped. When mounting the base 1, the rotating shaft of the rotational power can be fixed in the rotating part 20, so that the base 1 can rotate 180° under the control of the rotational power, which is convenient for processing.
[0047] The implementation principle of a workpiece 25 machining clamping fixture according to an embodiment of this application is as follows: the clamping assembly drives the connecting column 6 and the pressure head 7 through the telescopic power 5, and uses the slope 8 of the through sleeve 4 to guide the pressure head 7 to switch between a first state and a second state. At the same time, the clamping assembly cooperates with the support structure 2 to achieve rapid clamping or release of the workpiece 25. When releasing the workpiece 25, the connecting column 6 moves in conjunction with the through sleeve 4 to move the workpiece 25 away from the support structure 2.
[0048] Example 2:
[0049] The difference between this embodiment and Embodiment 1 is that the installation method of the fulcrum 202 and the telescopic power 5 is different.
[0050] Reference Figure 11Specifically, in this embodiment, the base 1 has an array of connecting holes 19 to form a grid-like coordinate hole array, and the distance between each connecting hole 19 and its adjacent vertical, horizontal, and vertical connecting holes 19 is consistent. The fulcrum 202 and the base 1, as well as the telescopic power 5 and the base 1, are both installed on the base 1 through adjustment components that cooperate with the connecting holes 19. The position is coarsely adjusted by cooperating the adjustment components with different connecting holes 19; and the fulcrum 202 and the telescopic power 5 can be further finely adjusted by adjusting their positions on the corresponding adjustment components, so that the fixture can adapt to workpieces 25 of different sizes.
[0051] Reference Figure 11 , Figure 12 and Figure 13 Specifically, the adjustment assembly includes a mounting base 14, a first adjustment base 15, a second adjustment base 16, a third adjustment base 17, and a mating base 18. The mounting base 14 is a square plate, and the size of the square grid formed by the four adjacent grids in the hole array is the same as the size of the mounting base 14. The mounting base 14 can be detachably installed onto the connecting hole 19 by two countersunk bolts.
[0052] The first adjusting seat 15 includes two horizontal screws 151, which are respectively installed on the upper and lower sides of the mounting seat 14, and extend horizontally. The second adjusting seat 16 includes two vertical screws 161, each extending vertically, and the upper and lower ends of each vertical screw 161 are respectively sleeved on the two horizontal screws 151 through sliding seats 22, so that the vertical screw 161 can slide axially along the horizontal screws 151. Nuts are threaded on the horizontal screws 151. After the position of the vertical screw 161 on the horizontal screws 151 is adjusted, the nuts are threaded and moved to abut against the opposite sides of the two sliding seats 22 on the horizontal screws 151 to limit the position of the vertical screw 161.
[0053] The third adjusting seat 17 includes two abutment seats 171. Each abutment seat 171 is slidably sleeved on two vertical screws 161 at both ends in the horizontal direction, allowing the abutment seat 171 to move axially along the vertical screws 161 while restricting the relative movement of the two vertical screws 161. Nuts are also threaded onto the vertical screws 161. After the abutment seats 171 are adjusted, the nuts are abutted against the opposite sides of the two abutment seats 171 on the vertical screws 161 to limit the abutment seats 171. It should be noted that each of the two abutment seats 171 has a protruding insertion block 23 on its opposite side.
[0054] The mating seat 18 is fixed to the fulcrum 202 and the telescopic power 5. The mating seat 18 has slots 24 on both its upper and lower sides for inserting the connecting blocks 23. When installing the fulcrum 202 or the telescopic power 5, the mating seat 18 is placed between the two abutment seats 171, allowing the connecting blocks 23 of the two abutment seats 171 to be inserted into the upper and lower slots 24 of the mating seat 18 respectively. Then, the nut on the vertical screw 161 is adjusted to abut against the side of the abutment seat 171 away from the mating seat 18, thus restricting the movement of the two abutment seats 171 on the vertical screw 161, thereby positioning the mating seat 18 relative to the mounting base 14. When it is necessary to adjust the position of the mating seat 18 relative to the mounting base 14, the position of the abutment seat 171 on the vertical screw 161 and the position of the vertical screw 161 on the horizontal screw 151 are adjusted.
[0055] In this embodiment, to facilitate the joint position adjustment of the telescopic power unit 5 and the mounting base 3, the mounting base 3 is fixed to the telescopic power unit 5. The illustrations in this embodiment use the cooperation between the fulcrum component 202 and the adjustment assembly as an example; the cooperation between the telescopic power unit 5 and the adjustment assembly is not shown.
[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A workpiece machining clamping fixture, characterized in that, include: The base (1), support structure (2), and clamping assembly; the base (1) extends vertically, and the support structure (2) is mounted on the base (1); the clamping assembly has multiple sets and is distributed on the base (1), and the mounting position of each set of clamping assemblies corresponds to the mounting hole (26) on the workpiece (25); each set of clamping assemblies includes The mounting base (3) is installed on the base (1) and has a through sleeve (4) for sliding through the mounting hole (26) of the workpiece (25). Telescopic power (5) is installed on the base (1); The connecting column (6) is connected to the telescopic end of the telescopic power (5) and slides through the connecting sleeve (4); and The pressing head (7) is movable on the periphery of the end of the connecting post (6) away from the base (1) and located in the external environment of the through sleeve (4). The pressing head (7) has a first state and a second state. The first state is characterized by the pressing head (7) being close to the connecting post (6), at which time the pressing head (7) and the connecting post (6) can pass through the mounting hole (26) of the workpiece (25) together. The second state is characterized by the pressing head (7) being away from the connecting post (6), at which time the cross-sectional dimension of the pressing head (7) and the connecting post (6) is larger than the dimension of the mounting hole (26) of the workpiece (25). When the telescopic power (5) extends, the pressing head (7) is in the first state, at which time the workpiece (25) can be fitted onto the through sleeve (4) through its own mounting hole (26); when the telescopic power (5) retracts, the pressing head (7) moves to the second state, so that the workpiece (25) is clamped between the pressing head (7) and the support structure (2).
2. The workpiece machining clamping fixture according to claim 1, characterized in that: The pressing head (7) includes a sliding part (71) and a pressing part (72) connected together. The sliding part (71) slides radially along the connecting post (6) on the periphery of the connecting post (6). The pressing part (72) is opposite to the periphery of the connecting post (6). The connecting post (6) gives the sliding part (71) a tendency to move towards the connecting post (6) by magnetic attraction. The end of the sleeve (4) near the pressure head (7) has a slope (8), which is used to guide the pressure part (72); when the pressure head (7) moves relative to the sleeve (4) toward the base (1), the pressure head (7) moves from the first state to the second state through the slope (8).
3. The workpiece machining clamping fixture according to claim 2, characterized in that: At least one set of the pressing head (7) is provided on the connecting column (6). When there are multiple sets of the pressing head (7), the multiple sets of the pressing head (7) are distributed circumferentially along the connecting column (6).
4. The workpiece machining clamping fixture according to claim 2, characterized in that: The through sleeve (4) slides in the mounting base (3). The outer periphery of the through sleeve (4) has a first stroke portion (9) protruding outwards. The mounting base (3) has a first stroke groove (10) for the first stroke portion (9) to slide. The inner periphery of the through sleeve (4) has a second stroke portion (11) protruding outwards. The connecting post (6) has a second stroke groove (12) for the second stroke portion (11) to slide. The sliding directions of the first stroke portion (9) and the second stroke portion (11) are parallel. When the telescopic end of the telescopic power (5) extends, the connecting column (6) pushes the second stroke part (11) to move, thereby causing the through sleeve (4) and the workpiece (25) on the through sleeve (4) to move away from the base (1), so that a gap is left between the workpiece (25) and the support structure (2).
5. A workpiece machining clamping fixture according to claim 4, characterized in that: The outer periphery of the through sleeve (4) is fitted with a collar (13). When the telescopic end of the telescopic power (5) extends, the through sleeve (4) abuts against the workpiece (25) through the collar (13) to push the workpiece (25) to move away from the base (1).
6. The workpiece machining clamping fixture according to claim 1, characterized in that: The support structure (2) includes a support frame (201) that extends around the base (1) and is used to support the workpiece (25).
7. A workpiece machining clamping fixture according to claim 1, characterized in that: The support structure (2) includes a fulcrum (202), and there are multiple fulcrums (202), which are spaced apart on the base (1).
8. A workpiece machining clamping fixture according to claim 7, characterized in that: Both the fulcrum (202) and the telescopic power (5) are mounted on the base (1) via an adjustment assembly, the adjustment assembly comprising: Mounting base (14) is mounted on the base (1); The first adjustment seat (15) is installed on the mounting seat (14) and extends along a straight line. The second adjusting seat (16) is adjusted and moved on the first adjusting seat (15) along the length extension direction of the first adjusting seat (15), while the length of the second adjusting seat (16) extends along the direction perpendicular to the length of the first adjusting seat (15); The third adjusting seat (17) is adjustable and movable on the second adjusting seat (16) along the length extension direction of the second adjusting seat (16); and The mating seat (18) is fixed to the fulcrum (202) and the telescopic power (5) respectively, and is detachably connected to the third adjustment seat (17).
9. A workpiece machining clamping fixture according to claim 8, characterized in that: The base (1) has arrayed connection holes (19), and the mounting base (14) is detachably installed to the connection holes (19) by bolts.
10. A workpiece machining clamping fixture according to claim 1, characterized in that: The base (1) has a rotating part (20) in the middle for mounting the rotating shaft.