Self-adaptive clamping tool clamp

Abstract

The utility model relates to the field of clamps and tools, and discloses a self-adaptive clamping tool clamp. Comprising a mounting plate, a first positioning unit and a second positioning unit, wherein the first positioning unit is arranged on the mounting plate and is provided with a first supporting surface for supporting a first part of a workpiece; the second positioning unit is arranged on the mounting plate and is provided with a second supporting surface for supporting a second part of the workpiece through lifting adjustment; the first positioning unit is used for positioning a first part on the first supporting face, and the second positioning unit is used for positioning a second part on the second supporting face. The first positioning unit is arranged to independently position and fix the first part, so that after the workpiece is locally fixed, the second positioning unit is arranged to limit the second part after lifting adjustment is carried out when the second part is supported, and therefore the workpiece can be supported and positioned no matter how the shape and size of the workpiece change; therefore, the workpiece is accurately positioned and fixed, self-adaptive clamping is achieved, and subsequent machining of the workpiece is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of frock clamp, especially in a kind of frock clamp of self-adaptive clamping. BACKGROUND

[0002] Frock clamp is the key equipment in industrial production, is the device for fixing workpiece in machining, assembly, welding etc.

[0003] With the development of industry, the product and corresponding workpiece produced become diversified.For some special-shaped and profile not using CNC machining parts, especially for the workpiece of product profile is aluminum extrusion position and not CNC machining, usually need to detect processing rotating shaft hole on workpiece with aluminum extrusion position as reference.This kind of workpiece usually includes first part and second part, second part is usually aluminum extrusion part, the size of first part and second part of different workpieces is not the same, but processing needs to be concentrated on aluminum extrusion position, it is difficult to accurately position workpiece using traditional clamp. SUMMARY

[0004] In view of the above technical problems of prior art, the technical problem to be solved by the utility model is to provide a kind of frock clamp of self-adaptive clamping to solve the problem that existing clamp is difficult to accurately position aluminum extrusion workpiece of different sizes.

[0005] To solve the above technical problems, one technical scheme of the utility model is to provide a kind of frock clamp of self-adaptive clamping, including: mounting plate, first positioning unit for supporting the first part of workpiece and second positioning unit for supporting the second part of workpiece by lifting adjustment, which are arranged on the mounting plate and have first support surface, the first positioning unit is used to position the first part on the first support surface, and the second positioning unit is used to position the second part on the second support surface.

[0006] Further, the first positioning unit includes support part connected to the mounting plate and used to support the first part, first power part arranged on the mounting plate and first pressing part used to press on the first surface of the first part, the first support surface is formed on the support part, the first power part has first pressing end close to or away from the first pressing part after operation, and the first power part makes the first pressing part press the first part on the support part when operating; the first pressing part includes lower cover plate used to press on the first surface of the first part and upper cover plate movably arranged on the support part in lifting direction and connected to the side of lower cover plate away from the support part, and the first pressing end acts on the upper cover plate.

[0007] Further, the support part comprises a reference plate connected to the mounting plate and a positioning plate fixedly connected to the reference plate, the first support surface is formed on the positioning plate, and a first positioning column is protruded on the first support surface for riveting with a corresponding hole structure on the first part.

[0008] Further, the first positioning unit further comprises a suction part for suctioning and positioning a second surface of the first part away from the first surface.

[0009] Further, the suction part is arranged on the support part, the suction part comprises a gas cavity formed in the support part and communicated with an external vacuum air extraction device, and a suction cavity is arranged on the first support surface and communicated with the gas cavity, when the first part is pressed on the first support surface by the first pressing part, a sealed state is formed between the first part and the first support surface.

[0010] Further, the suction cavity comprises a plurality of cavities distributed in the first support surface.

[0011] Further, the second positioning unit comprises a power lifting part arranged on the mounting plate and used for lifting the second part, a second power part connected to the mounting plate, and a power side pushing part connected to the mounting plate and used for abutting against the second part from the side, the second support surface is formed on the power lifting part, the second power part has a second pressing part for pressing the second part on the second support surface, and a second positioning column is arranged on the second power part for positioning the second power part when the second power part drives the second pressing part to press down; the first support surface has an abutting surface on the side away from the power side pushing part for abutting against the workpiece after the power side pushing part operates.

[0012] Further, the reference plate has a positioning space formed on the side of the positioning plate and recessed relative to the first support surface, and the power lifting part, the second power part and the power side pushing part all operate relative to the positioning space.

[0013] Further, the power lifting part has a lifting support end extending into the positioning space on the side of the second pressing part and lifting after operation, and the second support surface is formed on the lifting support end.

[0014] Further, the second pressing part comprises an extension arm having at least two extension sections and a pressing block formed on each extension section on the side toward the positioning space for pressing the second part.

[0015] The self-adaptive clamping tool clamp has at least the following beneficial effects: the first part is positioned and fixed separately through the first positioning unit, the workpiece is fixed partially, the second part is positioned after being lifted and adjusted through the second positioning unit when being supported, and thus the workpiece can be supported and positioned regardless of the shape and size of the workpiece, the workpiece is accurately positioned and fixed, self-adaptive clamping is realized, and subsequent machining of the workpiece is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the present application, form a part of the present application, and are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 is a structural schematic view of a workpiece;

[0018] Figure 2 is an assembly schematic view of an embodiment of the tool clamp of the present application;

[0019] Figure 3 is a structural schematic view of the mounting plate, the first positioning unit and the second positioning unit (the first driving member is hidden) of the present application;

[0020] Figure 4 is a structural schematic view of the mounting plate, the first positioning unit and the second positioning unit (the first driving member is hidden) of the present application from another angle;

[0021] Figure 5 is a front sectional view of the mounting plate, the first positioning unit and the second positioning unit of the present application;

[0022] Figure 6 is Figure 5 is an enlarged view of part A shown in the figure;

[0023] Figure 7 is an exploded view of the first pressing part and the first power part (the first driving member is hidden) of the present application;

[0024] Figure 8 is a structural schematic view of the positioning plate of the present application;

[0025] Figure 9 is a structural schematic view of the first power part of the present application;

[0026] Figure 10 is a structural schematic view of the second power part of the present application;

[0027] Figure 11 is a structural schematic view of the power lifting part of the present application;

[0028] Figure 12 The structure diagram of the power side pushing part of the utility model.

[0029] The meaning of each reference sign in the drawing is as follows:

[0030] Workpiece 1, first part 11, first surface 111, second surface 112, second part 12, four-axis tailstock 21, four-axis machine table 22, mounting plate 3, connecting edge 31, connecting hole 32, backing plate 33, side plate 34, first positioning unit 4, support part 41, reference plate 411, first area 4111, second area 4112, positioning space 4113, positioning plate 412, first positioning column 4121, third positioning column 4122, first support surface 42, abutting surface 421, first power part 43, first driving member 431, first pressing end 432, free end 433, inclined edge 434, first pressing part 44, first positioning hole 441, lower layer cover plate 442, upper layer cover plate 443, extension part 4431, third positioning hole 4432, avoiding groove 4433, adsorption part 45, air cavity 451, adsorption cavity 452, sealing ring 453, second positioning unit 5, power lifting part 51, second driving member 511, lifting support end 512, rod end 5121, positioning block 5122, second support surface 513, second power part 52, third driving member 521, second pressing part 522, extension arm 5221, extension section 5221a, lower pressing block 5222, second positioning column 523, positioning groove 524, power side pushing part 53, fourth driving member 531, slide rail 532, slide block 533, connecting plate 534, side pushing plate 535. DETAILED DESCRIPTION

[0031] The utility model will be further described below in combination with the drawings.

[0032] Please refer to Figure 1 It is one kind workpiece 1 structure, the workpiece 1 has first part 11 and second part 12.In this embodiment, the first part 11 of workpiece 1 is plate-like structure, and the second part 12 of workpiece 1 is the machining part of workpiece 1 and can be aluminum extrusion part. Among them, the machining such as hole, groove needs to be carried out on the second part 12 of the workpiece 1. Among them, the first part 11 has relatively distributed first surface 111 and second surface 112 in the thickness direction thereof.

[0033] Please refer to Figures 2 to 12The utility model discloses a self -adaptation clamping frock clamp includes mounting panel 3, sets up the first positioning unit 4 on mounting panel 3 and sets up the second positioning unit 5 on mounting panel 3, and mounting panel 3 is used to provide support for the first positioning unit 4 and the second positioning unit 5, and the first positioning unit 4 is used for positioning first part 11, and the second positioning unit 5 is used from multiple directions positioning second part 12, by respectively fixed second part 12 and first part 11, and from multiple directions to second part 12 carry out the location and fixed, compatible to the workpiece 1 of different shape size, to be able accurate fixedly hold second part 12 to guarantee the processing of workpiece 1.

[0034] Please refer to Figures 2 to 6In the embodiment, the mounting plate 3 is in a plate structure, in actual use, the mounting plate 3 is fixed by other devices, such as connecting the mounting plate by a four-axis mechanism, the four-axis mechanism is used to drive the mounting plate 3 to move, and can drive the mounting plate 3 to rotate in multiple axes as needed, so as to rotate the workpiece 1 to a position convenient for processing. The four-axis mechanism includes a four-axis tailstock 21 and a four-axis machine table 22 arranged opposite to the four-axis tailstock 21, and the four-axis tailstock 21 and the four-axis machine table 22 together constitute a four-axis machining center, which is an additional rotating shaft based on the traditional three-axis machine tool (X, Y, Z three linear moving axes), commonly known as the fourth axis. The rotating shaft can be a horizontal rotating shaft or a vertical rotating shaft, which is used to realize equal division, unequal division or continuous rotation machining of the workpiece 1. The inside is driven by a servo motor, and is reduced by a gear and a turbine load. Therefore, the four-axis tailstock 21 and the four-axis machine table 22 are provided with a rotating connecting seat on the side facing each other, and the servo motor drives the connecting seat to rotate. Since the four-axis mechanism is prior art, it will not be described in detail, and other devices such as chuck can also be used to fix the mounting plate 3. In order to facilitate the connection of the mounting plate 3 and the four-axis mechanism, the two opposite sides of the mounting plate 3 are tapered to form connecting edges 31, and the two connecting edges 31 can be connected to the connecting seats of the four-axis tailstock 21 and the four-axis machine table 22 respectively by bolts. Correspondingly, connecting holes 32 are formed in the two connecting edges 31 along the thickness direction of the mounting plate 3, and the bolts can be connected to the corresponding connecting seats by penetrating into the connecting holes 32. A backing plate 33 is fixed on the side of the mounting plate 3 along the thickness direction, and the backing plate 33 is adapted to the mounting plate 3 and covers the mounting plate 3 to increase the solidity of the mounting plate 3. The mounting area for mounting the first positioning unit 4 and the second positioning unit 5 is reserved on the overlapping area of the backing plate 33 and the mounting plate 3, and the first positioning unit 4 and the second positioning unit 5 are fixed on the mounting plate 3 through the mounting holes formed in the thickness direction of the mounting area. In order to facilitate understanding, the side of the mounting plate 3 along the thickness direction for positioning the workpiece 1 is defined as the top surface, and the other side of the mounting plate 3 along the thickness direction is defined as the bottom surface. Part of the first positioning unit 4 and the second positioning unit 5 is located on the bottom surface side of the mounting plate 3, and the other part of the first positioning unit 4 and the second positioning unit 5 is located on the top surface of the mounting plate 3 after penetrating through the corresponding mounting hole. The part on the top surface is used to position the workpiece 1, and the part on the bottom surface is protected. The side plates 34 are connected to the two opposite side edges of the mounting plate 3 respectively adjacent to the connecting edges 31 by using screws, and the side plates 34 on both sides enclose the part of the first positioning unit 4 and the second positioning unit 5 on the bottom surface inside.

[0035] Please refer to Figures 2 to 9The first positioning unit 4 comprises a supporting part 41 connected to the mounting plate 3, a first power part 43 arranged on the mounting plate 3, a first pressing part 44 for pressing the first part 11 on the first surface 111, and a suction part 45 for adsorbing and positioning the second surface 112 of the first part 11 away from the first surface 111. The supporting part 41 is used to support the first part 11 of the workpiece 1, the first pressing part 44 is pressed on the first part 11, and the first power part 43 can be moved to press the first part 11 on the first pressing part 44 until the first pressing part 44 presses the first part 11 tightly, thereby limiting the first part 11 in the thickness direction of the mounting plate 3, and the suction part 45 further improves the positioning effect of the first part 11. It should be noted that the first positioning unit 4 is not limited to the embodiment, and a chuck or other clamps such as a multi-jaw chuck can be directly used to fix the first part 11.

[0036] In the embodiment, the support part 41 comprises a reference plate 411 connected to the mounting plate 3 and a positioning plate 412 fixedly connected to the reference plate 411, the reference plate 411 is connected to the backing plate 33 by using bolts, thereby being fixed to the mounting plate 3, and the positioning plate 412 is used to place and support the first part 11 of the workpiece 1, so as to be clamped with the first pressing part 44 and the like to realize the positioning of the first part 11. Each part has a thickness and the thickness direction is consistent with the thickness direction of the mounting plate 3, so as to have a top surface and a bottom surface. In the content defined in the embodiment, the reference plate 411 is in a square plate structure and is usually made of a high-strength metal alloy material, so as to ensure sufficient support strength. The top surface of the reference plate 411 is divided into a first region 4111 and a second region 4112 in connection, the positioning plate 412 is installed on the first region 4111, and the positioning of the first part 11 of the workpiece 1 is performed on the first region 4111. The second positioning unit 5 is installed on the second region 4112, and the second part 12 of the workpiece 1 is positioned on the second region 4112, so that the positioning of the first part 11 and the positioning of the second part 12 can be performed separately and do not interfere with each other, thereby better fixing the workpiece 1. The positioning plate 412 is usually in a rectangular plate structure and covers the first region 4111 by fitting the top surface of the first region 4111, and the positioning plate 412 is fixed to the reference plate 411 by bolts and located on the top surface of the reference plate 411. The top surface of the positioning plate 412 has a first support surface 42 for supporting the first part 11, a first positioning column 4121 protruding from the first support surface 42 and used for riveting a corresponding hole structure on the first part 11, and a third positioning column 4122 protruding from the top surface of the positioning plate 412 and located on the side of the first support surface 42 away from the second positioning unit 5. The first support surface 42 is located on the side of the positioning plate 412 close to the second region 4112. The first positioning column 4121 is located on the side of the positioning plate 412 close to the second region 4112. In order to facilitate the installation of the workpiece 1 and reduce the damage to the first part 11, the first pressing part 44 is not connected to the first power part 43, the first positioning column 4121 and the second positioning column 523 are both protruding along the thickness direction of the mounting plate 3 and are both provided as at least two, the first positioning column 4121 corresponds to the hole structure provided on the first part 11, so that the first part 11 can be placed on the first support surface 42 along the thickness direction. The first pressing part 44 is provided with a third positioning hole 4432 corresponding to each third positioning column 4122 along the thickness direction of the mounting plate 3, the first pressing part 44 is sleeved on the third positioning column 4122 along the thickness direction through the positioning hole, the third positioning column 4122 limits the transverse movement of the first pressing part 44, so that the first pressing part 44 can be aligned with the first support surface 42 to press the first part 11. When the workpiece 1 needs to be installed, the first pressing part 44 can be removed along the thickness direction, the whole operation is simple and convenient to use.

[0037] In the embodiment, the first power parts 43 are arranged in at least two and are distributed along a first direction perpendicular to the thickness direction and the distribution direction of the first region 4111 and the second region 4112, wherein the distribution direction of the first region 4111 and the second region 4112 is a second direction, and the first positioning column 4121 and the third positioning column 4122 are distributed along the first direction. In the embodiment, the first power parts 43 are arranged in three and are equidistantly distributed, and correspondingly, the mounting holes include first mounting holes arranged in three and extending to the side of the reference plate 411 on the part of the mounting plate 3. Each first power part 43 includes a first driving part 431 and a first pressing end 432 arranged on the output end of the first driving part 431, each first driving part 431 is arranged in the three first mounting holes, and each first driving part 431 is fixed on the mounting plate 3 through a connecting plate 534 fixedly connected to the bottom surface of the mounting plate 3, and the first driving part 431 is located outside the side of the reference plate 411. The first driving part 431 can be a lever cylinder, and for this purpose, the first driving part 431 has an output shaft and a hinge rod, the hinge rod is located on the side close to the reference plate 411 and is hingedly connected to the middle part of the end of the first pressing end 432, and the output shaft of the first driving part 431 is hingedly connected to the end of the first pressing end 432. After the first driving part 431 operates, the output shaft is telescopic to swing the first pressing end 432 away from one end of the output shaft through the lever principle. The end of the first pressing end 432 away from the output end is a free end 433, and the free end 433 swings to approach or move away from the first pressing part 44 after the first driving part 431 operates. Specifically, when the output shaft of the first driving part 431 is contracted, the first pressing end 432 moves away from the first pressing part 44, at which time it is convenient to remove or install the workpiece 1 and the first pressing part 44; when the output shaft of the first driving part 431 is elongated, the first pressing end 432 approaches the first pressing part 44 until the first pressing end 432 abuts against the first pressing part 44 and the first pressing part 44 abuts against the first part 11. A sensor such as a proximity switch can be arranged on the first pressing end 432 to trigger the sensor when the first pressing end 432 contacts the first pressing part 44, so that the first driving part 431 stops operating, thereby realizing self-locking of the first driving part 431 and avoiding excessive extrusion of the first pressing end 432 on the first pressing part 44. In order to ensure that the pressure of the free end 433 can be applied at the middle position of the first part 11, the first pressing end 432 forms an inclined edge 434 from the bottom of the free end 433, so that the free end 433 gradually thickens from the side close to the output shaft, and the inclined edge 434 avoids the first pressing part 44 to a certain extent.

[0038] In the embodiment, the first pressing part 44 comprises a lower cover plate 442 and an upper cover plate 443 movably arranged on the support part 41 along a lifting direction and connected to a side of the lower cover plate 442 away from the support part 41, the lower cover plate 442 is used to press on the first surface 111 of the first part 11, the upper cover plate 443 is connected to a side of the lower cover plate 442 away from the support part 41 along the thickness direction of the mounting plate 3, and the first pressing end 432 is used to press on the top surface of the upper cover plate 443. The lower cover plate 442 is made of non-metallic material such as black steel, so that the hardness of the lower cover plate 442 is reduced to reduce the damage to the first surface 111 when the lower cover plate 442 is pressed on the first surface 111 of the first part 11. The upper cover plate 443 is made of metal material such as steel, so that the upper cover plate 443 has sufficient strength to provide strength support for the lower cover plate 442, and at the same time, the upper cover plate 443 is not easily damaged when the first pressing end 432 is pressed on the upper cover plate 443, thereby ensuring the service life of the upper cover plate 443. A T-shaped screw hole is formed in the lower cover plate 442, and a first screw hole is formed in the bottom surface of the upper cover plate 443 corresponding to the position of the T-shaped screw hole. A bolt is sequentially screwed into the T-shaped screw hole and the first screw hole, so that the head of the bolt abuts against the step structure of the T-shaped screw hole to avoid affecting the use of the bolt. The width of the upper cover plate 443 is greater than the width of the lower cover plate 442, and the width of the lower cover plate 442 is adapted to the first part 11. An extension 4431 is formed on the upper cover plate 443 corresponding to the position of the third positioning column 4122, and the third positioning hole 4432 is formed in the extension 4431 and adapted to the third positioning column 4122 so that the third positioning column 4122 can pass through the third positioning hole 4432, so that the upper cover plate 443 drives the lower cover plate 442 to move only along the lifting direction (i.e. the thickness direction of the mounting plate 3). An avoiding groove 4433 is recessed in the side of the upper cover plate 443 away from the second positioning unit 5 corresponding to the position of the free end 433, so that when the free end 433 gradually approaches the top surface of the upper cover plate 443, the inclined edge 434 passes through the avoiding groove 4433, and when the free end 433 contacts the top surface of the upper cover plate 443, the inclined edge 434 is still spaced from the groove wall of the avoiding groove 4433, so that the end of the free end 433 can be pressed on the top surface of the upper cover plate 443. It should be noted that when the first pressing end 432 is pressed on the upper cover plate 443, the free end 433 is located directly above the middle position of the lower cover plate 442, so as to ensure that the lower cover plate 442 has more uniform pressing effect on the first part 11 and is more firmly positioned. In the embodiment, notches are formed in the upper cover plate 443 and the lower cover plate 442 corresponding to the positions of the first positioning columns 4121 close to the second positioning unit 5, so as to avoid the arrangement of the first positioning columns 4121.

[0039] In this embodiment, to better adsorb the first part 11, an adsorption part 45 is provided on the support part 41. The adsorption part 45 includes an air chamber 451 formed in the support part 41 and connected to an external vacuum pumping device, and an adsorption chamber 452 opened on the first support surface 42 and connected to the air chamber 451. When the first pressing part 44 needs to be pressed against the first part 11, since the movement trajectory of the first pressing end 432 is circular, the direction of force applied when contacting the upper cover plate 443 is not perpendicular to the upper cover plate 443. Although it only occurs for a short time and is limited by the third positioning post 4122, there is a gap between the third positioning post 4122 and the third positioning hole 4432. This makes the first part 11 still possible to move under stress when subjected to force. To avoid this situation, the adsorption part 45 is provided. Before the first driving member 431 is run, the external vacuum pumping device is turned on, so that a negative pressure is formed in the air chamber 451 and the adsorption chamber 452 to hold the second surface 112 of the first part 11, thereby reducing or even avoiding the displacement of the workpiece 1. The air cavity 451 is located between the positioning plate 412 and the reference plate 411. An external vacuum pump is connected to the air cavity 451 via a pipe connected to the mounting plate 3. The air cavity 451 includes a main cavity and secondary cavities. A groove is recessed in the first region 4111 on the top surface of the reference plate 411. The air cavity 451 is formed by the groove and the bottom surface of the positioning plate 412. Several secondary cavities are formed on the positioning plate 412, and each secondary cavity is connected to the adsorption cavity 452 and the main cavity. The adsorption cavity 452 includes multiple cavities distributed at various locations on the first support surface 42, or it may be a single cavity extending linearly along the first support surface 42 for dispersion. It should be noted that when the first part 11 is pressed against the first support surface 42 by the first pressing part 44, a sealed state should be formed between the first part 11 and the first support surface 42. To this end, a slot is provided on the first support surface 42 to surround the adsorption cavity 452, and a sealing ring 453 is embedded in the slot.

[0040] Please see Figures 2 to 6 , Figures 10 to 12 The second positioning unit 5 includes a power lifting part 51 mounted on the mounting plate 3 for supporting the second part 12 by lifting, a second power part 52 connected to the mounting plate 3, and a power side pushing part 53 connected to the mounting plate 3 for pressing the second part 12 from the side. The power lifting part 51 is used to adjust the height to adapt to the bottom position of the second part 12 of different sizes. The second power part 52 is used to press the second part 12 against the power lifting part 51 to achieve a limit in the thickness direction. The power side pushing part 53 pushes the second part 12 from the second direction. Under the premise that the first part 11 is fixed by the first positioning unit 4, the second part 12 is restricted from the second direction to achieve multi-directional positioning and limiting. When positioning the second part 12, it can be used for different sizes and shapes to achieve an adaptive effect.

[0041] It should be noted that the second positioning unit 5 is not limited to the structure of this embodiment, and other structures can be used instead. For example, in another embodiment, the second positioning unit 5 includes an elastic support part 41 disposed on the reference plate 411, a second power part 52 connected to the mounting plate 3, and a power side push part 53 connected to the mounting plate 3 and used to press against the second part 12 from the side. A groove is recessed in the second region 4112 of the reference plate 411, and the elastic support part 41 is disposed in the groove. The elastic support part 41 consists of a telescopic rod, a spring sleeved on the telescopic rod, and a support block connected to the upper end of the telescopic rod. The support block is used to support the second part 12. The second power part 52 and the power side push part 53 are the same as in the aforementioned embodiment.

[0042] In this embodiment, at least two power lifting units 51 are provided to ensure stable support strength. In this embodiment, three units can be provided and evenly distributed along the first direction. The mounting holes include three second mounting holes corresponding to the three power lifting units 51. The base plate 411 covers the second mounting holes and has secondary mounting holes at the positions corresponding to the second mounting holes. Each power lifting unit 51 passes through the second mounting hole and is connected to the mounting plate 3. The power lifting unit 51 includes a second driving member 511 connected to the mounting plate 3 and a lifting support end 512 extending toward the side of the second power unit 52. At least a portion of the second driving member 511 is located in the second mounting hole, and the lifting support end 512 passes through the secondary mounting hole along the thickness direction of the mounting plate 3 to protrude from the top surface of the base plate 411. In order to accommodate workpieces of more sizes and to support the second part 12, a positioning space 4113 is formed on the side of the second region 4112 of the reference plate 411 that is close to the first support surface 42 and is recessed relative to the first support surface 42. On the side of the second region 4112 that is far from the first support surface 42 relative to the positioning space 4113, a part of the area is still reserved as a mounting surface. The second power unit 52 and the power side push unit 53 are both provided on the mounting surface, and the power lifting unit 51, the second power unit 52 and the power side push unit 53 all operate relative to the positioning space 4113. In use, the second part 12 is located in or above the positioning space 4113 after the first part 11 is placed in the first support surface 42. The lifting support end 512 moves in the positioning space 4113 by lifting. In this embodiment, the second driving member 511 can be a telescopic cylinder, which is a self-locking cylinder that can stop telescopically extending after contacting the second part 12 until the next operation is required. The second driving member 511 has an output end that extends and retracts along the thickness direction of the mounting plate 3. The lifting support end 512 is fixedly connected to the output end of the second driving member 511 and extends into the positioning space 4113 to move up and down toward the second power unit 52. The lifting support end 512 includes a rod end 5121 fixedly connected to the output shaft and a positioning block 5122 fixedly connected to the top of the rod end 5121. The top surface of the positioning block 5122 is defined as the second support surface 513 to support the bottom of the second part 12. In use, when or after the first part 11 is fixed, the second driving member 511 operates to extend the output shaft and drive the lifting support end 512 to move toward the second power unit 52 until the second support surface 513 contacts the second part 12, at which point the second driving member 511 stops operating.

[0043] In this embodiment, at least two second power units 52 are provided. To facilitate the processing of the second part 12, two second power units 52 are provided and distributed at intervals on both sides of the power-side push part 53 along the first direction, with processing space left between the two second power units 52. Corresponding to the second power units 52, the mounting holes include two third mounting holes opened on the mounting surfaces of the mounting plate 3 and the reference plate 411, and the two second power units 52 are installed in the third mounting holes. Each second power unit 52 includes a third driving member 521 mounted on the mounting plate 3, a second pressing part 522 connected to the output shaft of the third driving member 521, and a second positioning post 523 provided on the third driving member 521. The third driving member 521 is used to drive the second pressing part 522 to move so that the second pressing part 522 is used to press the second part 12 onto the second support surface 513. The third positioning post 4122 is used to position the second power unit 52 when the second power unit 52 drives the second pressure part to press down. The third drive member 521 is a rotary cylinder with a self-locking function. At least a portion of the third drive member 521 is located in the third mounting hole and is fixedly connected to the bottom surface of the mounting plate 3 by a connecting block. The output shaft of the third drive member 521 passes through the third mounting hole on the reference surface to extend out of the second region 4112 of the reference surface. The second pressing part 522 includes an extension arm 5221 having at least two extension segments 5221a and a pressing block 5222 formed on the side of each extension segment 5221a facing the positioning space 4113. The extension arm 5221 enables the pressing block 5222 to extend directly above the positioning space 4113. The pressing block 5222 is used to press the second part 12. The extension arm 5221 has a main arm fixedly connected to the output shaft of the third drive member 521 and two U-shaped extension segments 5221a. Two pressing blocks 5222 are corresponding to the two extension segments 5221a of each extension arm 5221, and are respectively located at the bottom of the two extension segments 5221a of each extension arm 5221, resulting in a total of four pressing blocks 5222. The pressing blocks 5222 can be made of the same material as the lower cover plate 442, or other materials. In this embodiment, the second positioning post 523 is fixedly connected to the second drive member 511 and arranged parallel to the output shaft. Through holes for the second positioning post 523 to pass freely are coaxially formed on both the mounting plate 3 and the reference plate 411. A positioning groove 524 is recessed on the side of the extension arm 5221 connected to the output shaft.In use, the output shaft of the third drive unit 521 is in the extended state and the extension section 5221a is misaligned outside the positioning space 4113. After the other parts are in place, the output shaft of the third drive unit 521 drives the extension arm 5221 to rotate directly above the second part 12. Then the output shaft retracts, driving the extension arm 5221 and the lower pressure block 5222 to descend and press against the top of the second part 12. Together with the lifting support end 512, the second part 12 is fixed in the thickness direction. After the processing is completed, the third drive unit 521 runs in the opposite direction: the output shaft extends, driving the lower pressure block 5222 away from the second part 12, and then turns away from the positioning space 4113.

[0044] Please see Figures 1 to 5 , Figure 12 The power-driven side-push unit 53 is configured as one unit and located between the two second power units 52. The power-driven side-push unit 53 includes a fourth drive member 531 connected to the reference plate 411, slide rails 532 connected to both sides or mounting surfaces of the fourth drive member 531 along the second direction, sliders 533 slidably disposed on the slide rails 532 along the second direction, a connecting plate 534 fixedly connected to the top surfaces of the two sliders 533, and a side-push plate 535 fixedly connected to the side of the connecting plate 534 near the first positioning unit 4. The connecting plate 534 is located above the fourth drive member 531, and the output shaft of the fourth drive member 531 is fixedly connected to the bottom surface of the connecting plate 534, so that the output shaft of the fourth drive member 531 drives the connecting plate 534 and the side-push plate 535 to move closer to or away from the first positioning unit 4 after operation. In the scope defined in this embodiment, the fourth drive member 531 is a linear telescopic cylinder with a self-locking function, and the output shaft of the fourth drive member 531 extends and retracts along the second direction toward the first positioning unit 4. When its output shaft extends, the side push plate 535 approaches the first positioning unit 4; when its output shaft retracts, the side push plate 535 moves away from the first positioning unit 4. The material of the connecting plate 534 can be the same as that of the upper cover plate 443, and the material of the side push plate 535 can be the same as that of the lower cover plate 442. In order to prevent the workpiece 1 from being excessively pushed by the side push unit 53 from pushing the second part 12 but the first positioning unit 4 malfunctions, causing the first part 11 to be not firmly fixed, the first support surface 42 has a supporting surface 421 on the side away from the power side push unit 53, so that the workpiece 1 can be held against it after the power side push unit 53 runs. The first support surface 42 opens towards the side of the second positioning unit 5, so that the cross-section of the first support surface 42 is L-shaped, and the depth of the first support surface 42 is less than the thickness of the first part 11, ensuring that the first pressing part 44 can press the first part 11.

[0045] The working method of one embodiment of the adaptive clamping fixture of this utility model is as follows: In the initial state, the free end 433 is away from the first support surface 42, the lifting support part 41 is in a telescopic state, the second pressing part 522 is misaligned outside the positioning space 4113, and the side push plate 535 is away from the positioning space 4113; In use, first remove the first pressing part 44, place the workpiece 1 on the device, so that the first part 11 is on the first support surface 42 and the second part 12 is in the positioning space 4113, then place the first pressing part 44 on the first part 11 so that the lower cover plate 442 presses against the first surface 111, and start the external... After the vacuum pumping device draws air through the adsorption chamber 452 to adsorb the second surface 112 of the first part 11, the first driving member 431 operates to drive the first pressing end 432 to press the first pressing part 44. The fourth driving member 531 operates until it presses against the side of the second part 12. Then, the second driving member 511 operates to drive the lifting support end 512 to move toward the second part 12 until the second support surface 513 contacts the bottom of the second part 12. Finally, the third driving member 521 operates to move the extension arm 5221 until the lower pressing block 5222 presses against the top of the second part 12. Thus, the positioning and fixing of the first part 11 and the second part 12 of the workpiece 1 are completed.

[0046] Compared with the prior art, the adaptive clamping fixture of this utility model can adaptively adjust its position and clamp the workpiece 1 according to the shape and size of the workpiece 1, so as to better meet the precision machining requirements of the workpiece 1 and complete mass production; it has strong versatility and high feasibility, and can be applied to the precision machining requirements of most workpieces 1, such as aluminum extrusion products.

Claims

1. An adaptive clamping fixture, characterized in that, include: Mounting plate; A first positioning unit is disposed on a mounting plate and has a first support surface for supporting a first portion of a workpiece. The first positioning unit is used to position the first portion on the first support surface. as well as The second positioning unit is mounted on the mounting plate and has a second support surface that can be adjusted by lifting to support a second part of the workpiece. The second positioning unit is used to position the second part on the second support surface.

2. The adaptive clamping fixture as described in claim 1, characterized in that: The first positioning unit includes a support portion connected to the mounting plate and used to support the first part, a first power portion disposed on the mounting plate, and a first pressing portion for pressing against the first surface of the first part. The first support surface is formed on the support portion. The first power portion has a first pressing end that moves closer to or further away from the first pressing portion after operation. When the first power portion is running, the first pressing end causes the first pressing portion to press the first part onto the support portion. The first pressing part includes a lower cover plate for pressing on a first surface of the first part and an upper cover plate that is movably disposed on the support part in the lifting direction and connected to the side of the lower cover plate away from the support part, and the first pressing end acts on the upper cover plate.

3. The adaptive clamping fixture as described in claim 2, characterized in that: The support portion includes a reference plate connected to the mounting plate and a positioning plate fixedly connected to the reference plate. The first support surface is formed on the positioning plate, and a first positioning post is protruding on the first support surface for riveting with a corresponding hole structure on the first portion.

4. The adaptive clamping fixture as described in claim 2 or 3, characterized in that: The first positioning unit further includes an adsorption part for adsorbing and positioning a second surface on the first part that is opposite to the first surface.

5. The adaptive clamping fixture as described in claim 4, characterized in that: The adsorption part is disposed on the support part; The adsorption part includes an air cavity formed in the support part and connected to an external vacuum pumping device, and an adsorption cavity opened on the first support surface and connected to the air cavity. When the first part is pressed against the first support surface by the first pressing part, a sealed state is formed between the first part and the first support surface.

6. The adaptive clamping fixture as described in claim 5, characterized in that: The adsorption cavity includes multiple cavities dispersed at various locations on the first support surface.

7. The adaptive clamping fixture as described in claim 3, characterized in that: The second positioning unit includes a power lifting part disposed on the mounting plate and used to support the second part by lifting, a second power part connected to the mounting plate, and a power side pushing part connected to the mounting plate and used to press the second part against the side. The second support surface is formed on the power lifting part. The second power part has a second pressing part for pressing the second part against the second support surface. The second power part is also provided with a second positioning post for positioning the second power part when the second power part drives the second pressure part to press down. The side of the first support surface away from the power-side pusher has a support surface on which the workpiece is held after the power-side pusher is in operation.

8. The adaptive clamping fixture as described in claim 7, characterized in that: A positioning space is formed on the reference plate, located on the side of the positioning plate and recessed relative to the first support surface. The power lifting unit, the second power unit, and the power side push unit all operate relative to the positioning space.

9. The adaptive clamping fixture as described in claim 8, characterized in that: The power lifting unit has a lifting support end that extends into the positioning space toward the second pressing part and rises and falls after operation, and the second support surface is formed on the lifting support end.

10. The adaptive clamping fixture as described in claim 9, characterized in that: The second pressing part includes an extension arm having at least two extension segments and a lower pressing block formed on the side of each extension segment facing the positioning space for pressing the second part.

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