Part clamping jig and part clamping process
Patent Information
- Application Number
- CN202510613114.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2025-07-04
Smart Images
Figure CN120244124A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of part clamping, and particularly relates to a part clamping fixture and a part clamping process. Background Art
[0002] Currently, for the part clamping fixture used in wire cutting, it generally compresses cylindrical micro parts through a profiling groove body or a profiling structure. However, in the actual use process, the existing part clamping fixture has the following defects: First, when the fixture is deformed or there is a deviation in the outer diameter size of the part, there will be problems that the fixture cannot effectively compress the part or over-compresses the part. If the fixture cannot compress the part, the part will become loose during the processing and lead to scrapping of the processing, while over-compressing the part by the fixture will cause imprints on the surface of the part, and in severe cases, even cause the part to be scrapped due to being flattened; Second, when clamping the part, it is necessary to manually disassemble the fixture or turn the screws, and the clamping steps are cumbersome and the clamping efficiency is low. Summary of the Invention
[0003] An object of this application is to provide a part clamping fixture that is convenient to clamp and does not damage the part.
[0004] The part clamping fixture provided by this application adopts the following technical solutions: A part clamping fixture includes a base, at least one clamping groove provided on the base for accommodating the part, and at least one clamping unit. The clamping unit includes at least one clamping rod movably arranged along its own axial direction, and a driving component for driving the clamping rod to move. The clamping rod has a first position in contact with the part and a second position separated from the part during its moving stroke.
[0005] By adopting the above technical solutions, the clamping rod can move along the direction close to or away from the part driven by the driving component, and it can clamp the part at the first position and disengage from the part at the second position, which can not only improve the clamping strength of the part, but also will not damage the part, and at the same time is convenient for clamping the part.
[0006] Preferably, there are multiple clamping grooves, the clamping unit includes multiple clamping rods, the multiple clamping rods correspond to the multiple clamping grooves one by one, the driving component includes a deformable shape memory wire sequentially passing through the multiple clamping rods, a power supply module electrically connected to the shape memory wire, and a plurality of first elastic members respectively sleeved on the multiple clamping rods. Both ends of the first elastic member are respectively connected to the clamping rod and the base, and the deformation direction of the shape memory wire and the telescopic direction of the first elastic member are the same as the moving direction of the clamping rod.
[0007] By adopting the above technical solution, multiple clamping rods can achieve fast and precise synchronous movement under the cooperation of the shape memory wire and multiple first elastic members. During the synchronous movement of the multiple clamping rods, multiple parts can be clamped simultaneously, effectively improving the clamping accuracy and efficiency of the parts.
[0008] Preferably, the shape memory wire includes multiple first wire bodies respectively passing through the multiple clamping rods, and multiple second wire bodies respectively located between every two adjacent clamping rods. When the clamping rod is in the first position, the axial centerlines of the multiple first wire bodies are relatively displaced from the axial centerlines of the multiple second wire bodies; when the clamping rod is in the second position, the axial centerlines of the multiple first wire bodies coincide with the axial centerlines of the multiple second wire bodies.
[0009] By adopting the above technical solution, multiple clamping rods can achieve synchronous movement during the relative deformation process of multiple first wire bodies and multiple second wire bodies, which is not only convenient to operate but also has high clamping efficiency.
[0010] Preferably, each clamping rod is respectively provided with a through hole for accommodating the first wire body. On both sides of the through hole, there are respectively provided retractable limit blocks. The arrangement direction of the two limit blocks is perpendicular to the moving direction of the clamping rod. On both sides of each limit block, there are respectively provided a first limit surface and a second limit surface. The arrangement direction of the first limit surface and the second limit surface is parallel to the moving direction of the clamping rod. The two first limit surfaces of the two limit blocks form a first limit groove, and the two second limit surfaces of the two limit blocks form a second limit groove. When the clamping rod is in the first position, the first wire body is accommodated in the first limit groove; when the clamping rod is in the second position, the first wire body is accommodated in the second limit groove.
[0011] By adopting the above technical solution, the two first limit surfaces and the two second limit surfaces can respectively limit the first wire body when the clamping rod is in the first position and the second position, preventing the first wire body from generating relative displacement with the clamping rod during the deformation process and affecting the clamping accuracy of the parts.
[0012] Preferably, the base is further provided with multiple bearing blocks, which are respectively located between every two adjacent clamping rods. The bearing block has a bearing surface, and a clamping seat is arranged on the bearing surface. The multiple second wire bodies respectively pass through the multiple clamping seats one by one.
[0013] By adopting the above technical solution, the second wire body can be relatively fixed to the base, thereby extending the moving stroke of the first wire body and improving the clamping accuracy of the clamping rod.
[0014] Preferably, a plurality of chambers are formed in the base, and the plurality of clamping rods are respectively disposed in the plurality of chambers in a one-to-one correspondence. An installation disk is coaxially arranged on the clamping rod, and the installation disk is located in the chamber. The first elastic member is sleeved on the clamping rod, and its two ends are respectively connected to the end wall of the chamber and the installation disk.
[0015] By adopting the above technical solution, the telescopic stability of the first elastic member is effectively improved, thereby improving the movement stability of the clamping rod.
[0016] Preferably, the outer diameter of the installation disk gradually increases or decreases along the axial direction of the clamping rod. A plurality of telescopic guide blocks are circumferentially arranged in the chamber around its own circumference. One side of each of the plurality of guide blocks close to the installation disk has a guide surface, and the guide surface is inclined and matches and fits with the outer wall of the installation disk.
[0017] By adopting the above technical solution, the clamping rod can maintain relatively stable linear movement under the cooperation of the plurality of guide blocks and the installation disk, preventing the clamping rod from shifting during the movement and affecting its clamping accuracy; at the same time, the plurality of guide blocks can also support the circumferential side of the installation disk to improve the movement stability of the clamping rod.
[0018] Preferably, there are a plurality of clamping units, and the plurality of clamping units are arranged at intervals along the length direction of the clamping groove, and the plurality of shape memory alloy wires constituting the plurality of clamping units are connected to each other.
[0019] By adopting the above technical solution, the plurality of clamping units can respectively clamp each part of the same part, effectively improving the clamping strength of the part and preventing the part from loosening during the processing.
[0020] Preferably, the base includes a lower seat body, an upper seat body arranged on the lower seat body, and an installation block arranged at the end of the lower seat body. The clamping groove is formed on the lower seat body. The upper seat body includes a first seat plate, a second seat plate and a third seat plate which are stacked in a direction away from the lower seat body. A fitting groove is formed on one end surface of the first seat plate close to the lower seat body, and the fitting groove and the clamping groove enclose a clamping channel for inserting the part. The clamping rod includes a rod body sleeved with the first elastic member, a first end portion arranged at one end of the rod body for passing through the shape memory alloy wire, and a second end portion arranged at the other end of the rod body for abutting against the part. The rod body is accommodated in the second seat plate, the first end portion is inserted into the third seat plate, and the second end portion passes through the first seat plate.
[0021] By adopting the above technical solution, the assembly difficulty between the base and the clamping rod is effectively reduced.
[0022] Another object of the present application is to provide a part clamping process.
[0023] A part clamping process provided by the present application adopts the following technical solution: A part clamping process, the part clamping process is based on the above-mentioned part clamping fixture, and the part clamping process includes the following steps: Step 1, install the part clamping fixture on the workbench, and then turn on the power module; Step 2, the shape memory wire generates heat and transforms into a straight line shape after being electrified. During the shape transformation process, the shape memory wire pulls multiple clamping rods to move respectively, and the multiple clamping rods move away from the clamping groove and move to the second position; Step 3, insert multiple parts into multiple clamping grooves respectively, and then turn off the power module; Step 4, multiple first elastic members pull multiple clamping rods to move, the multiple clamping rods move to the first position and respectively abut against multiple parts, and the shape memory wire transforms into a deformed state under the drive of the multiple clamping rods; Step 5, repeat steps 1-4, and then complete the continuous clamping of the parts.
[0024] By adopting the above technical solution, multiple clamping rods can achieve fast and precise synchronous movement under the cooperation of the shape memory wire and multiple first elastic members. During the synchronous movement of the multiple clamping rods, multiple parts can be clamped simultaneously, effectively improving the clamping accuracy and clamping efficiency of the parts.
[0025] In summary, the present invention includes at least one of the following beneficial technical effects: The clamping rod can move along the direction close to or away from the part under the drive of the driving component. It can clamp the part at the first position and disengage from the part at the second position, which can not only improve the clamping strength of the part, but also will not damage the part, and at the same time is convenient for clamping the part. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is the top view of the part clamping fixture in Embodiment 1 of the present application when the clamping rod is in the first position; Figure 2 is Figure 1 the schematic cross-sectional view taken along line A-A in Figure 3 is Figure 2 the enlarged schematic view at B in Figure 4 is Figure 1 the schematic cross-sectional view taken along line C-C in Figure 5 is Figure 4 the enlarged view of part D in Figure 6 the front view of the part clamping fixture in Embodiment 1 of the present application when the clamping rod is in the first position; Figure 7 is Figure 6 the sectional view taken along line E-E in Figure 8 is Figure 7 the enlarged view of part F in Figure 9 the top view of the part clamping fixture in Embodiment 1 of the present application when the clamping rod is in the second position; Figure 10 is Figure 9 the sectional view taken along line G-G in Figure 11 is Figure 10 the enlarged view of part H in Figure 12 is Figure 9 the sectional view taken along line I-I in Figure 13 is Figure 12 the enlarged view of part J in Figure 14 the front view of the part clamping fixture in Embodiment 1 of the present application when the clamping rod is in the second position; Figure 15 is Figure 14 the sectional view taken along line K-K in Figure 16 is Figure 15 the enlarged view of part L in Figure 17 the assembly diagram of the part clamping fixture and the workbench in Embodiment 1 of the present application.
[0027] Reference numerals in the drawings: 1. Base; 1a. Lower seat body; 1b. Upper seat body; 1b1. First seat plate; 1b2. Second seat plate; 1b3. Third seat plate; 1c. Mounting block; 2. Clamping groove; 2a. Groove opening; 3. Clamping rod; 3a. Rod body; 3b. First end; 3c. Second end; 4. Driving assembly; 4a. Shape memory wire; 4a1. First wire body; 4a2. Second wire body; 4b. Power supply module; 4c. First elastic member; 5. Through hole; 6. Limit block; 6a. First limiting surface; 6b. Second limiting surface; 7. Bearing block; 7a. Bearing surface; 8. Buckling seat; 9. Chamber; 10. Mounting disc; 11. Guide block; 11a. Guide surface; 12. Stop block; 13. Fitting groove; 14. Cutting groove; 15. First mounting groove; 16. Second elastic member; 17. Second mounting groove; 18. Third elastic member; 19. Slide groove; 20. First placement groove; 21. Second placement groove; 22. Electric wire; 100. Part; 101. Workbench. Detailed implementation mode
[0028] The following is further described in detail in conjunction with the attached Figures 1-17 This invention is further described in detail.
[0029] In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to this invention.
[0030] Embodiment 1: Refer to Figures 1-17 As shown in the figure, a part clamping fixture is shown, including a base 1, a plurality of clamping grooves 2 provided on the base 1 for accommodating parts 100, and six clamping units. The base 1 is horizontally arranged, and the plurality of clamping grooves 2 are arranged along the length direction of the base 1. Each clamping groove 2 extends along the width direction of the base 1. The plurality of clamping grooves 2 can accommodate multiple parts 100 for processing at the same time; the six clamping units are located above the clamping grooves 2 and are spaced along the length direction of the clamping grooves 2. The six clamping units can respectively clamp various parts of the same part 100, effectively improving the clamping strength of the part 100 and preventing the part 100 from loosening during the processing; six cutting grooves 14 are also provided on the base 1, which penetrate the base 1 in the vertical direction. The six cutting grooves 14 are respectively located between every two adjacent clamping units. Each cutting groove 14 extends along the length direction of the base 1. After cutting, the six clamping units respectively located between every two adjacent cutting grooves 14 can respectively clamp the cut multiple part segments.
[0031] In this embodiment, the clamping groove 2 is arc-shaped and can accommodate a fixed-length pipe fitting with an outer diameter of 1.0 - 1.5 mm. Of course, in some other embodiments, the shape of the clamping groove 2 can be changed according to the shape and size of the processed product. For example, the clamping groove 2 can be changed to a V-shaped groove to adapt to different specifications of pipes or workpieces with special-shaped cross-sections.
[0032] In this embodiment, in combination with Figures 2-3 and Figures 10-11 as shown, each clamping unit includes multiple clamping rods 3 arranged to be movable along the vertical direction and a driving assembly 4 for driving the movement of the clamping rods 3. The multiple clamping rods 3 correspond one-to-one to the multiple clamping grooves 2. The length direction of the clamping rods 3 is perpendicular to the length direction of the clamping grooves 2. Each clamping rod 3 has a first position in contact with the part 100 and a second position separated from the part 100 during its moving stroke.
[0033] When wire-cutting the part 100, first, the base 1 is installed on the workbench 101 of the wire-cutting machine. Then, multiple parts 100 are respectively inserted into the multiple clamping grooves 2. The driving assembly 4 drives the multiple clamping rods 3 constituting the six clamping units to descend and clamp on the multiple parts 100. The six clamping units can respectively clamp on each part of the part 100 in the length direction. Subsequently, the cutting device on the workbench 101 performs wire-cutting on the part 100 through the six cutting grooves 14. After cutting is completed, the driving assembly 4 drives the multiple clamping rods 3 constituting the six clamping units to rise and separate from the multiple parts 100. Then, the cut parts 100 can be taken out. In this way, by driving the clamping rods 3 to clamp or separate from the part 100 through the driving assembly 4, not only can the clamping strength of the part 100 be improved, but also the part 100 will not be damaged, and at the same time, it is convenient for clamping the part 100.
[0034] In this embodiment, the driving assembly 4 includes a deformable shape memory wire 4a that sequentially passes through the multiple clamping rods 3 constituting the same clamping unit, a power supply module 4b electrically connected to the shape memory wire 4a, and multiple first elastic members 4c respectively sleeved on the multiple clamping rods 3. The shape memory wire 4a is arranged along the horizontal direction. The first elastic members 4c are arranged along the vertical direction and their two ends are respectively connected to the clamping rods 3 and the base 1. The deformation direction of the shape memory wire 4a and the telescopic direction of the first elastic members 4c are both in the vertical direction.
[0035] Among them, in combination with Figures 6-8 and Figures 14-16As shown, six shape memory wires 4a forming six clamping units are connected in series with each other through electric wires 22 and connected to a power supply module 4b to form a circuit. The shape memory wires 4a are nickel-titanium wires, and their initial state is a deformed wavy shape. They have memory characteristics and can overcome the pulling force of the first elastic member 4c after being energized and heated and return from the deformed state to a straight shape; the first elastic member 4c is a spring, which is located below the shape memory wire 4a and can pull the clamping rod 3 after power-off. When clamping the part 100, the power supply module 4b is turned on, and the shape memory wire 4a can overcome the elastic force of the spring and reset, thereby driving multiple clamping rods 3 to move upward. At this time, the part 100 can be conveniently inserted into the clamping groove 2; after the part 100 is loaded, the power supply module 4b is turned off, and the spring pulls the clamping rod 3 to move downward and clamp the part 100. At this time, the shape memory wire 4a becomes wavy again. The part 100 can achieve fast and precise synchronous movement under the cooperation of the shape memory wire 4a and multiple first elastic members 4c. Multiple clamping rods 3 can clamp multiple parts 100 simultaneously during the synchronous movement process, effectively improving the clamping accuracy and efficiency of the parts 100.
[0036] In this embodiment, referring again to Figures 2-3 and Figures 10-11 shown, each shape memory wire 4a respectively includes multiple first wire bodies 4a1 respectively corresponding to and passing through multiple clamping rods 3 forming the same clamping unit, and multiple second wire bodies 4a2 respectively corresponding to and located between every two adjacent clamping rods 3. When the clamping rod 3 is in the first position, the axis lines of the multiple first wire bodies 4a1 are relatively displaced from the axis lines of the multiple second wire bodies 4a2; when the clamping rod 3 is in the second position, the axis lines of the multiple first wire bodies 4a1 coincide with the axis lines of the multiple second wire bodies 4a2.
[0037] Specifically, when the clamping rod 3 is in the first position, the multiple first wire bodies 4a1 have a downward deformation relative to the multiple second wire bodies 4a2 under the action of the spring, and the multiple clamping rods 3 can be driven by the multiple first wire bodies 4a1 to move downward and clamp the part 100; when the clamping rod 3 is in the second position, the multiple first wire bodies 4a1 are reset upward under the action of the current, and the multiple clamping rods 3 can be driven by the multiple first wire bodies 4a1 to move upward and disengage from the part 100. The multiple clamping rods 3 can achieve synchronous movement during the relative deformation process of the multiple first wire bodies 4a1 and the multiple second wire bodies 4a2, which is not only convenient to operate but also has high clamping efficiency.
[0038] In this embodiment, referring to Figures 4-5 and Figures 12-13As shown in the figure, each clamping rod 3 is respectively provided with a through hole 5 for accommodating the first wire body 4a1. First mounting grooves 15 are respectively provided on both sides of the through hole 5 in the horizontal direction. A second elastic member 16 is arranged in the first mounting groove 15. The second elastic member 16 is a spring. A limiting block 6 is connected to the second elastic member 16. The arrangement direction of the two limiting blocks 6 is perpendicular to the moving direction of the clamping rod 3. A first limiting surface 6a and a second limiting surface 6b are respectively arranged on the lower side and the upper side of each limiting block 6. The two first limiting surfaces 6a of the two limiting blocks 6 form a first limiting groove, and the two second limiting surfaces 6b of the two limiting blocks 6 form a second limiting groove. When the clamping rod 3 is in the first position, the first wire body 4a1 is accommodated in the first limiting groove; when the clamping rod 3 is in the second position, the first wire body 4a1 is accommodated in the second limiting groove.
[0039] When the clamping rod 3 is in the first position, the two limiting blocks 6 are relatively closed and the first wire body 4a1 is restricted in the first limiting groove. At this time, the first wire body 4a1 will not have relative displacement with the clamping rod 3, ensuring that the clamping rod 3 can effectively clamp the part 100; when the clamping rod 3 moves from the first position to the second position, the first wire body 4a1 passes through the two limiting blocks 6, and then the two limiting blocks 6 are closed again and the first wire body 4a1 is restricted in the second limiting groove. At this time, the first wire body 4a1 will not have relative displacement with the clamping rod 3, ensuring that the part 100 can be conveniently loaded or taken.
[0040] In this embodiment, referring again to Figures 2-3 and Figures 10-11 As shown in the figure, a plurality of bearing blocks 7 are further arranged on the base 1. The plurality of bearing blocks 7 are respectively located between each adjacent two clamping rods 3. The upper part of the bearing block 7 has a bearing surface 7a. A clamping seat 8 is arranged on the bearing surface 7a. The multiple second wire bodies 4a2 forming the same clamping unit are respectively and correspondingly passed through the multiple clamping seats 8. Among them, the clamping seat 8 is a clamp, which can fix the second wire body 4a2 on the bearing surface 7a, thereby restricting the movement of the second wire body 4a2 to extend the moving stroke of the first wire body 4a1 and improving the clamping accuracy of the clamping rod 3.
[0041] In this embodiment, a plurality of chambers 9 are opened in the base 1. The multiple clamping rods 3 are respectively and correspondingly passed through the multiple chambers 9. An installation disk 10 is coaxially arranged at the lower part of the clamping rod 3. The installation disk 10 is located in the chamber 9. The first elastic member 4c is sleeved on the clamping rod 3 and its upper and lower ends are respectively connected to the upper end wall of the chamber 9 and the installation disk 10.
[0042] Further, the outer diameter of the mounting disc 10 gradually decreases along the top-down direction. A plurality of second mounting grooves 17 are respectively formed on the peripheral side wall of the chamber 9. A third elastic member 18 is arranged in the second mounting groove 17. The third elastic member 18 is a spring. A guiding block 11 is connected to the third elastic member 18. One sides of the plurality of guiding blocks 11 close to the mounting disc 10 respectively have guiding surfaces 11a. The guiding surfaces 11a are inclined arc surfaces and can be matched and attached to the outer wall of the mounting disc 10. The clamping rod 3 can maintain relatively stable linear motion under the cooperation of the plurality of guiding blocks 11 and the mounting disc 10, preventing the clamping rod 3 from shifting during movement and affecting its clamping accuracy. At the same time, the plurality of guiding blocks 11 can also support the lower part of the periphery of the mounting disc 10 to improve the movement stability of the clamping rod 3 and prevent the clamping rod 3 from accidentally descending and affecting the normal loading of the part 100.
[0043] In this embodiment, in combination with Figure 4 and Figure 12 as shown, one end of the clamping groove 2 has a notch 2a for the part 100 to be inserted. A stop block 12 is also arranged in the base 1. The stop block 12 is embedded at one end of the clamping groove 2 far from the notch 2a. The part 100 can be conveniently inserted and positioned in the clamping groove 2, and its end can directly abut against the stop block 12, without the need to adjust the loading position of the part, effectively improving the clamping efficiency of the part 100.
[0044] In this embodiment, in combination with Figure 4 、 Figure 12 and Figure 17 as shown, the base 1 includes a lower seat body 1a, an upper seat body 1b arranged on the lower seat body 1a, and a mounting block 1c arranged at one end of the lower seat body 1a in the horizontal direction. The mounting block 1c is used to connect with the workbench 101. The clamping groove 2 is formed in the upper part of the lower seat body 1a. The upper seat body 1b includes a first seat plate 1b1, a second seat plate 1b2 and a third seat plate 1b3 which are sequentially stacked along the bottom-up direction. The lower seat body 1a, the mounting block 1c, the first seat plate 1b1, the second seat plate 1b2 and the third seat plate 1b3 are respectively connected by bolts, and the assembly is extremely convenient.
[0045] A fitting groove 13 is formed on the lower end surface of the first seat plate 1b1. The fitting groove 13 and the clamping groove 2 enclose a clamping passage for the part 100 to be inserted. The clamping rod 3 includes a rod body 3a sleeved with a first elastic member 4c, a first end 3b arranged at the upper end of the rod body 3a for passing through the shape memory wire 4a, and a second end 3c arranged at the lower end of the rod body 3a for abutting against the part 100. A plurality of chambers 9 for accommodating the rod body 3a, the mounting disc 10 and the first elastic member 4c are formed in the second seat plate 1b2. The chambers 9 extend along the vertical direction. The first end 3b and the second end 3c respectively pass through the chambers 9 and are arranged outside.
[0046] Further, a plurality of sliding grooves 19 for the second ends 3c to pass through are formed in the first base plate 1b1. The sliding grooves 19 extend along the vertical direction and communicate with the fitting grooves 13. The plurality of second ends 3c are respectively slidably disposed in the corresponding sliding grooves 19. A plurality of bearing blocks 7 are respectively disposed on the upper portion of the second base plate 1b2. A plurality of first placement grooves 20 are formed in the bottom of the third base plate 1b3. The plurality of first placement grooves 20 are arranged along the width direction of the base 1, and each first placement groove 20 extends along the length direction of the base 1. The plurality of first ends 3b, the shape memory wires 4a, and the plurality of bearing blocks 7 respectively located between every two adjacent first ends 3b of each clamping unit are all accommodated in the same first placement groove 20. A second placement groove 21 is also communicated between every two adjacent first placement grooves 20. The electric wires 22 for connecting six shape memory wires 4a in series are accommodated in the second placement groove 21.
[0047] Embodiment 2: This embodiment discloses a part clamping process, which is based on the part clamping fixture of Embodiment 1 and includes the following steps: Step 1: Install the part clamping fixture on the workbench 101, and then turn on the power module 4b; Step 2: After the shape memory wire 4a is energized, it generates heat and transforms into a straight form. During the transformation process of the shape memory wire 4a, it respectively pulls a plurality of clamping rods 3 to move. The plurality of clamping rods 3 move away from the clamping grooves 2 and move to the second position; Step 3: Insert a plurality of parts 100 into the plurality of clamping grooves 2 respectively, and then turn off the power module 4b; Step 4: A plurality of first elastic members 4c pull the plurality of clamping rods 3 to move. The plurality of clamping rods 3 move to the first position and respectively abut against the plurality of parts 100. The shape memory wire 4a is driven by the plurality of clamping rods 3 to transform into a deformed state; Step 5: Repeat Steps 1-4, and then complete the continuous clamping of the parts 100.
[0048] The embodiments of this specific implementation manner are all preferred embodiments of the present invention. Without limiting the protection scope of the present invention accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.
Claims
1. A part clamping fixture, characterized in that: The invention comprises a base (1), at least one clamping groove (2) arranged on the base (1) for accommodating a part (100), and at least one clamping unit, wherein the clamping unit comprises at least one clamping rod (3) arranged to be movable along its own axial direction, and a driving assembly (4) for driving the clamping rod (3) to move, wherein the clamping rod (3) has a first position in contact with the part (100) and a second position separated from the part (100) during its moving stroke.
2. The part clamping fixture according to claim 1, wherein: There are multiple clamping grooves (2), and the clamping unit includes multiple clamping rods (3), and the multiple clamping rods (3) correspond one to one with the multiple clamping grooves (2). The driving component (4) includes a deformable memory metal wire (4a) that is sequentially passed through the multiple clamping rods (3), a power supply module (4b) that is electrically connected to the memory metal wire (4a), and multiple first elastic members (4c) that are respectively correspondingly sleeved on the multiple clamping rods (3), and the two ends of the first elastic member (4c) are respectively connected to the clamping rod (3) and the base (1), and the deformation direction of the memory metal wire (4a) and the telescopic direction of the first elastic member (4c) are the same as the moving direction of the clamping rod (3).
3. The clamping fixture for parts according to claim 2, characterized in that: The memory metal wire (4a) comprises a plurality of first wires (4a1) respectively and correspondingly inserted into the plurality of clamping rods (3), and a plurality of second wires (4a2) respectively and correspondingly located between each two adjacent clamping rods (3). When the clamping rod (3) is in the first position, the axis lines of the plurality of first wires (4a1) and the axis lines of the plurality of second wires (4a2) are relatively misaligned; when the clamping rod (3) is in the second position, the axis lines of the plurality of first wires (4a1) and the axis lines of the plurality of second wires (4a2) coincide with each other.
4. The part clamping fixture according to claim 3, characterized in that: Each of the clamping rods (3) is provided with a through hole (5) for accommodating the first filament (4a1), and two opposite sides of the through hole (5) are provided with retractable limit blocks (6), and the arrangement direction of the two limit blocks (6) is perpendicular to the moving direction of the clamping rod (3), and the two opposite sides of each limit block (6) are provided with a first limit surface (6a) and a second limit surface (6b), and the arrangement direction of the first limit surface (6a) and the second limit surface (6b) is perpendicular to the moving direction of the clamping rod (3). Parallel to the moving direction of the clamping rod (3), the two first limiting surfaces (6a) constituting the two limiting blocks (6) are combined into a first limiting groove, and the two second limiting surfaces (6b) constituting the two limiting blocks (6) are combined into a second limiting groove. When the clamping rod (3) is in the first position, the first thread (4a1) is accommodated in the first limiting groove; when the clamping rod (3) is in the second position, the first thread (4a1) is accommodated in the second limiting groove.
5. The clamping fixture for parts according to claim 3, characterized in that: A plurality of bearing blocks (7) are further arranged on the base (1). The plurality of bearing blocks (7) are respectively located between every two adjacent clamping rods (3). The bearing block (7) has a bearing surface (7a), and a clamping seat (8) is arranged on the bearing surface (7a). The multi-segment second wire bodies (4a2) are respectively inserted into the plurality of clamping seats (8) in a one-to-one correspondence.
6. The clamping fixture for parts according to claim 2, characterized in that: A plurality of chambers (9) are formed in the base (1). The plurality of clamping rods (3) are respectively inserted into the plurality of chambers (9). An installation disk (10) is coaxially arranged on the clamping rod (3). The installation disk (10) is located in the chamber (9). The first elastic member (4c) is sleeved on the clamping rod (3), and its two ends are respectively connected to the end wall of the chamber (9) and the installation disk (10).
7. A part clamping fixture according to claim 6, characterized in that: The outer diameter of the installation disk (10) gradually increases or decreases along the axial direction of the clamping rod (3). A plurality of telescopic guide blocks (11) are arranged circumferentially in the chamber (9). One side of each of the plurality of guide blocks (11) close to the installation disk (10) has a guide surface (11a). The guide surface (11a) is inclined and is matched and attached to the outer wall of the installation disk (10).
8. A part clamping fixture according to claim 2, characterized in that: There are a plurality of clamping units. The plurality of clamping units are arranged at intervals along the length direction of the clamping groove (2). The plurality of shape memory alloy wires (4a) constituting the plurality of clamping units are connected to each other.
9. The clamping fixture for parts according to claim 2, wherein: The base (1) includes a lower seat body (1a), an upper seat body (1b) arranged on the lower seat body (1a), and an installation block (1c) arranged at the end of the lower seat body (1a). The clamping groove (2) is formed in the lower seat body (1a). The upper seat body (1b) includes a first seat plate (1b1), a second seat plate (1b2), and a third seat plate (1b3) which are stacked in a direction away from the lower seat body (1a). A fitting groove (13) is formed in one end surface of the first seat plate (1b1) close to the lower seat body (1a). The fitting groove (13) and the clamping groove (2) enclose a clamping channel for inserting the part (100). The clamping rod (3) includes a rod body (3a) sleeved with the first elastic member (4c), a first end (3b) arranged at one end of the rod body (3a) for passing through the shape memory alloy wire (4a), and a second end (3c) arranged at the other end of the rod body (3a) for abutting against the part (100). The rod body (3a) is accommodated in the second seat plate (1b2), the first end (3b) is inserted into the third seat plate (1b3), and the second end (3c) passes through the first seat plate (1b1).
10. A part clamping process, characterized in that: The part clamping process is based on the part clamping fixture according to any one of claims 2-9. The part clamping process includes the following steps: Step 1, install the part clamping fixture on the workbench (101), and then turn on the power module (4b); Step 2: After the shape memory wire (4a) is energized, it generates heat and transforms into a straight shape. During the transformation process, the shape memory wire (4a) pulls multiple clamping rods (3) to move respectively, and the multiple clamping rods (3) move away from the clamping groove (2) and move to the second position; Step 3: Insert multiple parts (100) into multiple clamping grooves (2) respectively, and then turn off the power module (4b); Step 4: Multiple first elastic members (4c) pull multiple clamping rods (3) to move. The multiple clamping rods (3) move to the first position and respectively abut against multiple parts (100). The shape memory wire (4a) transforms into a deformed state under the drive of the multiple clamping rods (3); Step 5: Repeat steps 1-4, and then complete the continuous clamping of the parts (100).