Four-axis clamp for special-shaped workpiece

Abstract

The invention provides a four-axis clamp for a special-shaped workpiece, and relates to the technical field of tool clamps, the four-axis clamp comprises a pair of stand columns, and a tool clamp table is installed between the stand columns in a turnover mode; the tool clamp table is composed of a table top and self-adaptive clamp boxes movably installed in multiple directions of the table top, UV glue containing grooves and ultraviolet lamp beads are formed in the sides, close to workpieces, of the box bodies, the UV glue containing grooves are filled with UV glue, the workpieces are invaded into the UV glue, so that the outer contour of the workpieces is formed in the UV glue, and the outer contour of the workpieces is formed in the UV lamp beads. The self-adaptive clamp box can be manufactured by sequentially translating the lateral clamp body, rotating the lateral clamp body and shaping the top lifting clamp body, a groove formed by the self-adaptive clamp box can be attached to the surface of the special-shaped workpiece, the special-shaped workpiece can be clamped more firmly, and damage to the workpiece cannot be caused; and ultraviolet light sterilization and disinfection can be carried out on the special-shaped workpiece and the clamp through ultraviolet light irradiation.

Description

Technical Field

[0001] The invention relates to the technical field of tooling fixtures, and in particular to a four-axis fixture for special-shaped workpieces. Background Art

[0002] The prior art discloses a lathe fixture for clamping special-shaped workpieces, which has a publication number of "CN213289510U", and comprises a chuck base, a square hole is provided at the center of the chuck base, and a workpiece is arranged on the chuck base, a circumferential orientation device and a longitudinal positioning device are threadedly connected to the chuck base, and the circumferential orientation device comprises a first positioning column and a second positioning column, and a first fastening screw and a second fastening screw are respectively threadedly connected in the first positioning column and the second positioning column, and the first fastening screw and the second fastening screw are both in contact with the outer side surface of the workpiece, and by setting a positioning clamping plate, with the assistance of the chuck base, the workpiece can be clamped and effectively limited in the longitudinal direction, and by setting the first fastening screw and the second fastening screw, the three outer side surfaces of the workpiece can be effectively positioned, so that the workpiece is clamped between the three fastening screws, and the circumferential direction of the workpiece can be effectively positioned, so as to achieve the purpose of effectively clamping and positioning the workpiece as a whole.

[0003] However, the above-mentioned device still has obvious defects during use: the above-mentioned device clamps the heterogeneous workpiece by tightening screws. Due to the small force point, this clamping method is prone to slippage and loss of clamping force during the clamping process, and the pressure on the workpiece surface is relatively large, which can easily cause damage to the workpiece. In addition, the above-mentioned clamp has a relatively single function and is difficult to meet the diverse needs of the clamp in the process of clamping the workpiece. Summary of the invention

[0004] The purpose of the present invention is to provide a four-axis clamp for special-shaped workpieces to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A four-axis fixture for special-shaped workpieces, comprising:

[0007] A pair of columns, the columns are arranged at intervals, and a tool fixture table is installed between the columns in a flip manner;

[0008] A tooling fixture table, wherein both sides of the tooling fixture table are fixedly installed with turning axis frames, and the turning axis frames on both sides are correspondingly inserted into the axial holes opened by the columns on both sides, so that the tooling fixture table can turn around the axial holes of the columns, and the tooling fixture table is composed of a table top and an adaptive fixture box movably installed in multiple directions on the table top, and an assembly groove is opened on the table top, and an engaging seat is correspondingly installed in the assembly groove, and the workpiece is placed on the table top through the workpiece groove opened in the engaging seat, and the adaptive fixture box includes a translational lateral clamp body, a rotating lateral clamp body and a top lifting clamp body;

[0009] The translational lateral clamping body, the rotational lateral clamping body and the top lifting clamping body all include a box body, a UV glue containing groove is opened on the side of the box body close to the workpiece, a plurality of array-arranged ultraviolet lamp beads are installed at the bottom of the UV glue containing groove, and the UV glue is filled with UV glue. The workpiece is invaded into the UV glue so that the outer contour of the workpiece is formed in the UV glue. After the workpiece contour is formed, the ultraviolet lamp beads are turned on, and the UV glue in the UV glue containing groove is solidified. Then, the workpiece is removed to complete the production of the adaptive fixture box, and the translational lateral clamping body, the rotational lateral clamping body and the top lifting clamping body are shaped in turn. After the shaping is completed, the batch clamping operation of the workpiece can be carried out.

[0010] Preferably, a pair of the columns are fixedly mounted with a flip motor, a worm is fixedly mounted on the driving shaft of the flip motor, the worm cooperates with a worm wheel, the worm wheel is fixedly sleeved on the flip shaft frame inserted into the axial center hole, and the power of the flip motor is transmitted to the flip shaft frame through the cooperation of the worm wheel mechanism.

[0011] Preferably, a pair of translational lateral clamps are provided, and the pair of translational lateral clamps are symmetrically arranged on both sides of the assembly groove, and the box body of the translational lateral clamp is fixedly mounted on the translation frame, and the bottom of the translation frame is movably embedded in the translation groove opened on the table top, and a translation screw is fixedly installed in the translation groove in a fixed-axis rotatable manner, and the translation screw is fixedly connected to the driving shaft of the translation motor, and a screw hole for inserting the translation screw is correspondingly opened at the bottom of the translation frame, and the rotation of the translation screws on both sides drives the translational lateral clamps on both sides to move toward or away from each other synchronously, thereby completing the lateral clamping or contact limit fixation of the workpiece.

[0012] Preferably, the box body of the top lifting clamp is fixedly connected to the telescopic arm of the electric hydraulic telescopic cylinder, and the extension and retraction of the electric hydraulic telescopic cylinder drives the box body part of the top lifting clamp to move up and down, thereby achieving top clamping or releasing the limit of the workpiece.

[0013] Preferably, the rotating lateral clamp specifically includes a base and a lifting clamp plate, the lifting clamp plate is movably installed in a lifting groove provided in the base, the base is inserted into an arc-shaped slide groove provided on the side of the table top, the base slides in an arc shape around the assembly groove, a limiting hole is provided in the arc-shaped slide groove, and a pin hole corresponding to the limiting hole is provided on the base, and the limiting pin passes through the limiting hole and the pin hole to complete the limiting fixation of the base.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention inserts the workpiece into a UV glue containing groove for UV glue and hardens and shapes it under the irradiation of ultraviolet light, so that a groove wrapped around the surface of the special-shaped workpiece is formed in the adaptive clamp box, and finally the clamping of the special-shaped workpieces in batch production is completed. The formed groove can fit the surface of the special-shaped workpiece, and the special-shaped workpiece can be clamped more firmly without causing damage to the workpiece.

[0016] The ultraviolet lamp beads of the present invention not only serve as a one-time forming mechanism for the UV glue groove, but can also perform ultraviolet light sterilization and disinfection on special-shaped workpieces and the fixture itself through ultraviolet light irradiation, and are particularly suitable for workpiece processing environments of medical equipment and food machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the rearward axis view of the fixture table of the present invention;

[0018] Figure 2 It is a schematic diagram of the forward axis view of the fixture table of the present invention;

[0019] Figure 3 It is a schematic diagram of the internal structure of the box body of the present invention.

[0020] In the figure: 1 column, 2 fixture table, 3 flip axis frame, 4 axis hole, 5 table top, 6 assembly groove, 7 translation lateral clamp body, 8 rotation lateral clamp body, 9 top lifting clamp body, 10 box body, 11 UV glue storage groove, 12 UV lamp beads, 13 flip motor, 14 translation frame, 15 translation groove, 16 translation screw rod, 17 electric hydraulic telescopic cylinder, 18 base, 19 lifting clamp plate, 20 arc slide groove, 21 limit hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-3 , the present invention provides a technical solution:

[0023] Embodiment 1:

[0024] A four-axis fixture for special-shaped workpieces, comprising:

[0025] A pair of columns 1, the pair of columns 1 are arranged at intervals, and a tool fixture table 2 is installed between the columns 1 in a flip manner;

[0026] The tooling fixture table 2 has a turning axis frame 3 fixedly installed on both sides of the tooling fixture table 2. The turning axis frames 3 on both sides are correspondingly inserted into the axial holes 4 opened in the columns 1 on both sides, so that the tooling fixture table 2 can turn around the axial holes 4 of the columns 1. The tooling fixture table 2 is composed of a table 5 and an adaptive fixture box movably installed in multiple directions on the table. An assembly groove 6 is opened on the table 5, and a fitting seat is correspondingly installed in the assembly groove 6. The workpiece is placed on the table 5 through the workpiece groove opened in the fitting seat. The adaptive fixture box includes a translational lateral clamp body 7, a rotating lateral clamp body 8 and a top lifting clamp body 9;

[0027] The translational lateral clamp body 7, the rotational lateral clamp body 8 and the top lifting clamp body 9 all include a box body 10. A UV glue receiving groove 11 is opened on the side of the box body 10 close to the workpiece. A plurality of array-arranged ultraviolet lamp beads 12 are installed at the bottom of the UV glue receiving groove 11. The UV glue receiving groove 11 is filled with UV glue. The workpiece is inserted into the UV glue so that the outer contour of the workpiece is formed in the UV glue. After the workpiece contour is formed, the ultraviolet lamp beads 12 are turned on. At this time, the UV glue in the UV glue receiving groove 11 is cured. Then, the workpiece is removed to complete the production of the adaptive fixture box. The translational lateral clamp body 7, the rotational lateral clamp body 8 and the top lifting clamp body 9 are shaped in turn as needed. After the shaping is completed, the batch clamping operation of the workpiece can be carried out.

[0028] In this embodiment, the columns 1 on both sides serve as the supporting mechanism of the tooling fixture table 2. The tooling fixture table 2 is connected to the columns 1 on both sides by means of the flip axis frames 3 installed on both sides of the tooling fixture table 2, so that the flip axis frames 3 can drive the tooling fixture table 2 to flip during the rotation around the axial center hole 4. An assembly groove 6 is provided on the table top 5, and a fitting seat is installed in the assembly groove 6. The fitting seat is a template groove specially customized according to the fixture, so that the mass-produced special-shaped workpieces can fit tightly on the fitting seat. Since the fitting seat has only one side, the mass-produced workpieces cannot be fixed in the template groove formed by the fitting seat. For this reason, the prior art often fixes the special-shaped workpieces in other directions by fastening screws, but the present application also provides a method for fixing the special-shaped workpieces in the platform 5. An adaptive clamp box is arranged on the surface, which includes a translational lateral clamp body 7, a rotating lateral clamp body 8 and a top lifting clamp body 9, which can be fixed in multiple directions as needed. However, the adaptive clamp box in this embodiment is not a clamp body prefabricated according to a specific special-shaped workpiece. It can adapt to the clamping needs of different special-shaped workpieces. The adaptive clamp box includes a box body 10, and a UV glue containing groove 11 for containing UV glue is opened in the box body 10. A plurality of array-arranged ultraviolet lamp beads 12 are installed at the bottom of the UV glue containing groove 11. When anti-sticking silicone oil is coated on the surface of the workpiece and immersed in the UV glue, the outer surface of the workpiece can be tightly wrapped due to the good fluidity of the UV glue. After the wrapping is completed, the UV inside the box body 10 is used to The irradiation of UV rays can make the UV glue permanently solidify. At this time, the workpiece wrapped with anti-stick silicone oil can be removed to form a fixed workpiece outer contour in the UV glue containing groove 11 of the box body. According to the needs, the box body 10 of the translational lateral clamp body 7, the rotational lateral clamp body 8 or the top lifting clamp body 9 is placed downward in turn to complete the shaping operation of all the adaptive clamp boxes that need to be clamped. Finally, the adaptive clamp box can form specific grooves for specific workpieces, so that batch clamping operations of specific special-shaped workpieces can be performed. The advantage of this design is that compared with the existing fastening bolt abutment method, it has a larger contact area with the special-shaped workpiece, which can tighten and clamp while reducing the damage to the outer surface of the workpiece. Compared with the existing method of making outer contour clamps according to special-shaped workpieces, the molding method of this embodiment has lower cost and simpler operation process, and does not require precision machine tool processing. In this embodiment, only one engaging seat needs to be made, and the rest of the adaptive fixture box part can be targetedly adapted according to the structure of different special-shaped workpieces, so that it has a wider range of molding characteristics and a wider range of applications. In addition, the ultraviolet lamp beads 12 provided in the present invention not only serve as a one-time permanent curing mechanism of UV glue, but since ultraviolet light can also penetrate UV glue, the ultraviolet lamp beads 12 in this embodiment can also achieve sterilization and disinfection of special-shaped workpieces and fixture bodies. Such a setting is particularly suitable for the production of parts for medical devices and food machinery.

[0029] Embodiment 2:

[0030] A flip motor 13 is fixedly installed on a pair of columns 1, and a worm is fixedly installed on the driving shaft of the flip motor 13. The worm cooperates with the worm wheel, and the worm wheel is fixedly sleeved on the flip shaft frame 3 inserted into the axial center hole 4. The power of the flip motor 13 is transmitted to the flip shaft frame 3 through the cooperation of the worm wheel mechanism.

[0031] In this embodiment, a specific driving mechanism of the jig table 2 is further disclosed. By transmitting power through a worm gear mechanism, the flipping operation can be realized more stably. Moreover, since the worm gear transmission has a reverse self-locking characteristic, the jig table 2 can be stably kept at a certain specific angle, thereby facilitating the processing of special-shaped workpieces.

[0032] Embodiment three:

[0033] A pair of translational lateral clamping bodies 7 are provided, and the pair of translational lateral clamping bodies 7 are symmetrically arranged on both sides of the assembly groove 6. The box body 10 of the translational lateral clamping body 7 is fixedly installed on the translation frame 14. The bottom of the translation frame 14 is movably embedded in the translation groove 15 opened on the table 5. A translation screw rod 16 is fixedly installed in the translation groove 15 in a fixed-axis rotatable manner. The translation screw rod 16 is fixedly connected to the driving shaft of the translation motor. A screw rod hole for inserting the translation screw rod 16 is correspondingly opened at the bottom of the translation frame 14. The rotation of the translation screw rods 16 on both sides drives the translational lateral clamping bodies 7 on both sides to move toward or away from each other synchronously, thereby completing the lateral clamping or contact limit fixation of the workpiece.

[0034] In this embodiment, a pair of translational lateral clamping bodies 7 are provided, through which they synchronously move toward or away from each other, so as to clamp and fix the special-shaped workpiece placed between the two. The translational driving mechanism is a translational screw 16, and the rotation of the translational screw 16 drives the translation frame 14 to translate and slide, thereby finally realizing the translational sliding of the translational lateral clamping body 7.

[0035] Embodiment 4:

[0036] The box body 10 of the top lifting clamp body 9 is fixedly connected to the telescopic arm of the electric hydraulic telescopic cylinder 17. The extension and retraction of the electric hydraulic telescopic cylinder 17 drives the box body 10 of the top lifting clamp body 9 to partially lift and lower, thereby achieving top clamping or releasing the limit of the workpiece.

[0037] In this embodiment, an electric hydraulic telescopic cylinder 17 is used to drive the top lifting clamp body 9 to perform lifting movement. Since this structure is commonly used in the prior art, it will not be described in detail here.

[0038] Embodiment five:

[0039] The rotating lateral clamp body 8 includes a base 18 and a lifting clamp plate 19. The lifting clamp plate 19 is movably installed in a lifting groove opened in the base 18. The base 18 is inserted into an arc-shaped slide groove 20 opened on the side of the table 5. The base 18 slides in an arc around the assembly groove 6. A limiting hole 21 is opened in the arc-shaped slide groove 20. A pin hole matching the limiting hole 21 is correspondingly opened on the base 18. The limiting pin passes through the limiting hole 21 and the pin hole to complete the limiting fixation of the base 18.

[0040] In this embodiment, the rotating motion component of the rotating lateral clamping body 8 is further disclosed. The base 18 cooperates with the guide rail set in the arc-shaped slide groove 20 through the opened slide groove, so that the base 18 can slide in an arc in the arc-shaped slide groove 20, and is limited and fixed by the set limiting holes 21 and the pin holes. The lifting clamping plate 19 is lifted and slid under the drive of the screw mechanism. Since this mechanism has been disclosed in detail in Example 3, it will not be repeated here.

[0041] It should be emphasized that the above-mentioned various electrical components can be electrically connected to the main control MCU, so that the main control MCU can autonomously drive each adaptive fixture box to move, thereby realizing autonomous clamping or removing restrictions on special-shaped workpieces.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A four-axis fixture for special-shaped workpieces, characterized in that: include: A pair of columns, the columns are arranged at intervals, and a tool fixture table is installed between the columns in a flip manner; A tooling fixture table, wherein both sides of the tooling fixture table are fixedly installed with turning axis frames, and the turning axis frames on both sides are correspondingly inserted into the axial holes opened by the columns on both sides, so that the tooling fixture table can turn around the axial holes of the columns, and the tooling fixture table is composed of a table top and an adaptive fixture box movably installed in multiple directions on the table top, and an assembly groove is opened on the table top, and an engaging seat is correspondingly installed in the assembly groove, and the workpiece is placed on the table top through the workpiece groove opened in the engaging seat, and the adaptive fixture box includes a translational lateral clamp body, a rotating lateral clamp body and a top lifting clamp body; The translational lateral clamping body, the rotational lateral clamping body and the top lifting clamping body all include a box body, a UV glue containing groove is opened on the side of the box body close to the workpiece, a plurality of array-arranged ultraviolet lamp beads are installed at the bottom of the UV glue containing groove, and the UV glue is filled with UV glue. The workpiece is invaded into the UV glue so that the outer contour of the workpiece is formed in the UV glue. After the workpiece contour is formed, the ultraviolet lamp beads are turned on, and the UV glue in the UV glue containing groove is solidified. Then, the workpiece is removed to complete the production of the adaptive fixture box, and the translational lateral clamping body, the rotational lateral clamping body and the top lifting clamping body are shaped in turn. After the shaping is completed, the batch clamping operation of the workpiece can be carried out.

2. The four-axis fixture for special-shaped workpieces according to claim 1, characterized in that: A flip motor is fixedly mounted on a pair of the columns, a worm is fixedly mounted on the driving shaft of the flip motor, the worm cooperates with a worm wheel, and the worm wheel is fixedly sleeved on a flip shaft frame inserted into the axial center hole, and the power of the flip motor is transmitted to the flip shaft frame through the cooperation of the worm wheel mechanism.

3. A four-axis fixture for special-shaped workpieces according to claim 1 or 2, characterized in that: The translation lateral clamping bodies are provided with a pair, and the pair of translation lateral clamping bodies are symmetrically arranged on both sides of the assembly groove, and the box body of the translation lateral clamping bodies is fixedly installed on the translation frame, and the bottom of the translation frame is movably embedded in the translation groove opened on the table top, and a translation screw rod is fixedly installed in the translation groove in a fixed-axis rotatable manner, and the translation screw rod is fixedly connected to the driving shaft of the translation motor, and a screw rod hole for the translation screw rod to be inserted is correspondingly opened at the bottom of the translation frame, and the rotation of the translation screw rods on both sides drives the translation lateral clamping bodies on both sides to move toward or away from each other synchronously, thereby completing the lateral clamping or contact limit fixation of the workpiece.

4. The four-axis fixture for special-shaped workpieces according to claim 3, characterized in that: The box body of the top lifting clamp is fixedly connected to the telescopic arm of the electric hydraulic telescopic cylinder. The telescopic movement of the electric hydraulic telescopic cylinder drives the box body of the top lifting clamp to move up and down, thereby achieving top clamping or releasing the limit of the workpiece.

5. The four-axis fixture for special-shaped workpieces according to claim 4, characterized in that: The rotating lateral clamp specifically includes a base and a lifting clamp plate, the lifting clamp plate is movably installed in a lifting groove opened in the base, the base is inserted into an arc-shaped slide groove opened on the side of the table top, the base slides in an arc shape around the assembly groove, a limiting hole is opened in the arc-shaped slide groove, and a pin hole matching the limiting hole is correspondingly opened on the base, and the limiting pin passes through the limiting hole and the pin hole to complete the limiting fixation of the base.

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