A pre-hole positioning self-adapting automatic alignment special clamping device

Abstract

The application relates to a pre-hole positioning self-adaptive automatic alignment special clamping device, which is characterized in that the device comprises an automatic alignment clamping mechanism and a hole positioning mechanism; the automatic alignment clamping mechanism comprises a clamp base, first and second overturning clamping units and an overturning power mechanism; the first and second overturning clamping units are arranged at two ends of the clamp base; the hole positioning mechanism is arranged on the top of the clamp base and is used for pre-positioning the machining hole of a workpiece; under the driving action of the overturning power mechanism, the workpiece on the hole positioning mechanism is rotated relative to the clamp base, the first and second overturning clamping units are used for self-adaptive compensation of the appearance surface form error of the workpiece in the pre-positioning position, and the workpiece is clamped and positioned. The pre-machining hole is used for workpiece positioning, the positioning hole only bears the positioning function, the positioning block is not subjected to cutting load in the machining process, and the pre-machining hole is prevented from being extruded and deformed and the hole position precision is prevented from being damaged.

Description

Technical Field

[0001] This invention relates to a clamping device, specifically a pre-hole positioning adaptive automatic alignment special clamping device, belonging to the field of mechanical automation processing technology. Background Technology

[0002] Sheet metal parts are widely used in the machining field. Sheet metal parts are usually first rough-machined by cutting, and for structural parts with high assembly and fitting accuracy requirements, secondary finishing is required after cutting. To ensure the positional accuracy of mounting holes, some mounting holes are reserved for secondary machining processes, which increases the number of workpiece clamping and machining steps, and reduces machining efficiency.

[0003] For medium to large structural components, when there is a need for double-sided assembly machining, the mass production process usually involves completing single-sided machining first, and then using a two-pin method on one side to achieve secondary positioning of the workpiece. Under this clamping condition, it is necessary to prevent the positioning pins from deforming and being damaged due to machining loads, while also compensating for the form and position errors existing on the blank surface. Existing clamping schemes are difficult to simultaneously meet both of these requirements, and problems such as decreased positioning accuracy and unstable workpiece clamping are prone to occur during machining. Summary of the Invention

[0004] The purpose of this invention is to provide a pre-hole positioning adaptive automatic alignment special clamping device that is not only easy to operate, but also uses pre-machined holes to achieve workpiece positioning. The positioning block only performs the positioning function and is not subjected to cutting load during the processing, thus avoiding the pre-machined hole from being squeezed and deformed and the hole position accuracy from being damaged, so as to ensure the reliability of the workpiece processing reference.

[0005] To achieve the above objectives, the technical solution of the present invention is: a pre-hole positioning adaptive automatic alignment clamping device, the innovation of which lies in: including an automatic alignment clamping mechanism and a hole positioning mechanism. The automatic alignment and clamping mechanism includes a clamping base, a first flip clamping unit, a second flip clamping unit, and a flip power mechanism. The first and second flip clamping units are located at opposite ends of the clamping base, and the flip power mechanism is positioned outside the second flip clamping unit. The flip power mechanism provides flip power to the first and second flip clamping units, causing them to flip relative to the clamping base. The hole positioning mechanism is located on the top of the fixture base and is used to pre-position the machining hole of the workpiece. Under the driving action of the flipping power mechanism, the first flipping clamping unit and the second flipping clamping unit on the hole positioning mechanism rotate relative to the fixture base and adaptively compensate for the surface shape error of the workpiece to pre-position the workpiece, and clamp and position the workpiece.

[0006] In the above technical solution, the first flip clamping unit includes a first pressing flap and a first return spring. The first pressing flap is disposed on one side of the clamp base and rotatably connected to it. The first return spring is disposed on the first pressing flap, with one end of the first return spring abutting against the side wall of the clamp base and the other end abutting against the end face of the first adjusting bolt provided on the first pressing flap. The extension and retraction of the first return spring is controlled by tightening the first adjusting bolt to control the spring force, and the spring force is applied to the clamp base. The second flip clamping unit includes a second pressing flap and a second return spring. The second pressing flap is disposed on the other side of the clamp base and rotatably connected thereto. The second return spring is disposed on the second pressing flap, with one end abutting against the side wall of the clamp base and the other end abutting against the end face of the second adjusting bolt provided on the second pressing flap. The extension and retraction of the second return spring is controlled by tightening the second adjusting bolt to control the spring force, and the spring force is applied to the clamp base. The flipping power mechanism provides flipping power for the first pressing flip plate and the second pressing flip plate, and under the action of the first return spring and the second return spring, the pressing position at the upper end of the first pressing flip plate and the second pressing flip plate is moved away from the workpiece on the hole positioning mechanism without the pushing force.

[0007] In the above technical solution, the first pressing flap is rotatably connected to the fixture base via a first flipping shaft, and the second pressing flap is rotatably connected to the fixture base via a second flipping shaft.

[0008] In the above technical solution, the first pressing flap includes a first flap base, a first arc-shaped pressure plate, a first small arc-shaped pressure plate, a first pivot pin, and a first small pivot pin. The first arc-shaped pressure plate is disposed in a slot of the first flap base and is fixed to the first flap base by the first pivot pin and rotates around the first pivot pin. The slots at both ends of the first arc-shaped pressure plate are respectively provided with first small arc-shaped pressure plates. The first small arc-shaped pressure plates are fixed to the first arc-shaped pressure plate by the first small pivot pin and rotate around the first small pivot pin. The second pressing flap includes a second flap base, a second arc-shaped pressure plate, a second small arc-shaped pressure plate, a second pivot pin, and a second small pivot pin. The second arc-shaped pressure plate is disposed in a slot in the second flap base and is fixed to the second flap base by the second pivot pin and rotates around the second pivot pin. The slots at both ends of the second arc-shaped pressure plate are respectively provided with second small arc-shaped pressure plates. The second small arc-shaped pressure plates are fixed to the second arc-shaped pressure plate by the second small pivot pin and rotate around the second small pivot pin.

[0009] In the above technical solution, the first small arc-shaped pressure plate and the second small arc-shaped pressure plate have two independent pressure surfaces, which can always be in contact with two points on the appearance surface of the workpiece, and adaptively compensate for the shape error of the appearance surface of the workpiece to achieve multi-point clamping and positioning of the workpiece.

[0010] In the above technical solution, the fixture base is T-shaped, and the two sides of the fixture base are provided with slots that cooperate with the first flip plate base and the second flip plate base.

[0011] In the above technical solution, the flipping power mechanism includes a power component and an automatic alignment pin. The automatic alignment pin is disposed on the fixture base and slides therewith. The power component is disposed on the outside of the second flipping clamping unit. The power component pushes the automatic alignment pin and drives the second clamping flap of the second flipping clamping unit and the first clamping flap of the first flipping clamping unit to rotate and clamp the workpiece.

[0012] In the above technical solution, the power assembly includes a power source and a push rod. The power source is assembled and connected to the second clamping flap. The push rod is fixed at the top of the power source. The power source pushes the automatic alignment pin through the push rod, thereby pushing the second clamping flap and the first clamping flap to rotate. When either the second clamping flap or the first clamping flap contacts the workpiece, it stops rotating. The other flap continues to rotate until it contacts the workpiece, thereby generating a clamping force to complete the clamping and positioning of the workpiece.

[0013] In the above technical solution, the power assembly further includes an adapter plate, the power source is fixed on the adapter plate, and the adapter plate is fixed on the outer wall of the second pressing flap.

[0014] In the above technical solution, the hole positioning mechanism includes a positioning level block, which is fixed to the fixture base by bolts and positioning pins, and is used to position the machined hole of the workpiece.

[0015] In the above technical solution, the positioning level block is equipped with a positioning round pin to prevent workpiece displacement and a positioning diamond pin to compensate for workpiece positioning.

[0016] The above technical solution also includes a bearing component, which includes a clamping base plate and multiple sets of alignment and clamping mechanisms arranged in a matrix on the clamping base plate.

[0017] In the above technical solution, the clamping base plate is provided with lifting lugs for easy hoisting.

[0018] In the above technical solution, the bottom of the clamping base plate is also provided with a reference positioning pin, a clamping pin and a diamond positioning pin that cooperate with the positioning of the equipment operating table, so as to ensure that the clamping base plate is stable, does not shake or shift relative to the equipment operating table.

[0019] The positive effects of this invention are: by using the pre-hole positioning adaptive automatic alignment clamping device of this invention, since this invention includes an automatic alignment clamping mechanism and a hole positioning mechanism, The automatic alignment and clamping mechanism includes a clamping base, a first flip clamping unit, a second flip clamping unit, and a flip power mechanism. The first and second flip clamping units are located at opposite ends of the clamping base, and the flip power mechanism is positioned outside the second flip clamping unit. The flip power mechanism provides flip power to the first and second flip clamping units, causing them to flip relative to the clamping base. The hole positioning mechanism is located on the top of the fixture base and is used to pre-position the machining hole of the workpiece. Under the driving action of the flipping power mechanism, the first flipping clamping unit and the second flipping clamping unit on the hole positioning mechanism rotate relative to the fixture base and adaptively compensate for the surface shape error of the workpiece to pre-position the workpiece, as well as clamp and position the workpiece. In use, the workpiece is placed on the hole positioning mechanism. After the workpiece is positioned, the flipping power mechanism is driven. The first flipping clamping unit and the second flipping clamping unit rotate to clamp the workpiece. At the same time, the first flipping clamping unit or the second flipping clamping unit contacts the workpiece first and then stops rotating, while the other continues to rotate until both of them contact the workpiece and continue to act to generate clamping force. Meanwhile, the pin hole of the workpiece is not subjected to force.

[0020] This invention relates to a clamping technology for thickness-direction planar machining and threaded hole machining of sheet metal cutting parts under secondary positioning with holes, and a clamping method suitable for milling and drilling operations on medium and large structural parts using a two-pin secondary positioning method. Based on the pre-machined holes on the workpiece and the relative positional relationship between the remaining machining features and the holes, the pre-machined holes are used to achieve workpiece positioning. The positioning holes only serve a positioning function. During the machining process, the positioning holes are not subjected to cutting loads, avoiding the pre-machined holes from being squeezed and deformed, and the hole position accuracy is not damaged, thus ensuring the reliability of the workpiece machining datum.

[0021] The present invention also has the following advantages: it can automatically align the outer contour of the workpiece according to the pre-processed hole positions, reduce the manual alignment requirements for workpiece loading and placement, reduce the time spent on manual alignment, improve clamping efficiency, and is suitable for batch production scenarios.

[0022] Furthermore, the clamping device of the present invention separates the positioning and clamping phases, which can compensate for the shape and position errors of the blank surface, has good clamping stability, effectively ensures the relative positional accuracy between subsequent secondary processing features such as milling and drilling and pre-processed holes, and improves the consistency of finished products.

[0023] Meanwhile, the invention has a high degree of integration of its overall structure, is suitable for sheet metal cutting parts and secondary positioning processing of medium and large structural parts, is compatible with one-sided two-pin secondary positioning process, has strong versatility, and is easy to integrate into automated production lines. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of a specific embodiment of the present invention; Figure 2 This is a three-dimensional assembly diagram of the automatic alignment clamping mechanism and the hole positioning mechanism of the present invention; Figure 3 yes Figure 2 Structural diagram; Figure 4 yes Figure 3 A top-down view; Figure 5 This is a three-dimensional structural diagram of the fixture base of the present invention; Figure 6 This is a three-dimensional structural schematic diagram of the flip plate base of the present invention; Figure 7 This is a three-dimensional structural schematic diagram of the arc-shaped pressure plate of the present invention; Figure 8 This is a three-dimensional structural diagram of the small arc-shaped pressure plate of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] like Figure 1 , 2 As shown in Figures 3, 4, 5, 6, 7, and 8, a pre-hole positioning adaptive automatic alignment clamping device includes an automatic alignment clamping mechanism 1 and a hole positioning mechanism 2. The automatic alignment clamping mechanism 1 includes a clamping base 11, a first flip clamping unit 12, a second flip clamping unit 13, and a flipping power mechanism 14. The first flip clamping unit 12 and the second flip clamping unit 13 are disposed at both ends of the clamping base 11, and the flipping power mechanism 14 is arranged outside the second flip clamping unit 13. Simultaneously, the flipping power mechanism 14 provides flipping power to the first flip clamping unit 12 and the second flip clamping unit 13, driving them to flip relative to the clamping base 11. The hole positioning mechanism 2 is located on the top of the fixture base 11 and is used to pre-position the machining hole of the workpiece. Under the driving action of the flipping power mechanism 14, the workpiece on the hole positioning mechanism 2 causes the first flipping clamping unit 12 and the second flipping clamping unit 13 to rotate relative to the fixture base 11 and adaptively compensate for the surface shape error of the workpiece to pre-position the workpiece, as well as clamp and position the workpiece.

[0028] Furthermore, such as Figure 2 , 3 As shown, to achieve workpiece clamping, the first flip clamping unit 12 includes a first pressing flip plate 121 and a first return spring 122. The first pressing flip plate 121 is disposed on one side of the fixture base 11 and rotatably connected to it. The first return spring 122 is disposed on the first pressing flip plate 121, with one end of the first return spring 122 abutting against the side wall of the fixture base 11 and the other end abutting against the end face of the first adjusting bolt 123 provided on the first pressing flip plate 121. The extension and retraction of the first return spring is controlled by tightening the first adjusting bolt 123 to control the spring force, and the spring force is applied to the fixture base 11. The second flip clamping unit 13 includes a second pressing flap 131 and a second return spring 132. The second pressing flap 131 is disposed on the other side of the clamp base 11 and rotatably connected thereto. The second return spring 132 is disposed on the second pressing flap 131, with one end abutting against the side wall of the clamp base 11 and the other end abutting against the end face of the second adjusting bolt 133 provided on the second pressing flap 131. The extension and retraction of the second return spring is controlled by tightening the second adjusting bolt 133 to control the spring force, and the spring force is applied to the clamp base 11. The flipping power mechanism 14 provides flipping power for the first pressing flip plate 121 and the second pressing flip plate 131, and under the action of the first return spring 122 and the second return spring 132, the pressing position of the upper end of the first pressing flip plate 121 and the second pressing flip plate 131 is moved away from the workpiece on the hole positioning mechanism 2 without the pushing force.

[0029] Furthermore, such as Figure 3As shown, in order to allow the clamping flip plate to rotate flexibly relative to the fixture base and clamp the workpiece, the first clamping flip plate 121 is rotatably connected to the fixture base 11 through the first flipping shaft 124, and the second clamping flip plate 131 is rotatably connected to the fixture base 11 through the second flipping shaft 134.

[0030] Furthermore, such as Figure 2 , 3 As shown, in order to achieve multi-point clamping of the workpiece and automatic compensation for surface height differences, the first clamping flip plate 121 includes a first flip plate base 1211, a first arc-shaped pressure plate 1212, a first small arc-shaped pressure plate 1213, a first pivot pin 1214, and a first small pivot pin 1215. The first arc-shaped pressure plate 1212 is disposed in a slot of the first flip plate base 1211 and is fixed to the first flip plate base 1211 by the first pivot pin 1214 and rotates around the first pivot pin 1214. The slots at both ends of the first arc-shaped pressure plate 1212 are respectively provided with first small arc-shaped pressure plates 1213. The first small arc-shaped pressure plates 1213 are fixed to the first arc-shaped pressure plate 1212 by the first small pivot pin 1215 and rotate around the first small pivot pin 1215. The second pressing flap 131 includes a second flap base 1311, a second arc-shaped pressure plate 1312, a second small arc-shaped pressure plate 1313, a second pivot pin 1314, and a second small pivot pin 1315. The second arc-shaped pressure plate 1312 is disposed in the slot of the second flap base 1311 and is fixed on the second flap base 1311 by the second pivot pin 1314 and rotates around the second pivot pin 1314. The slots at both ends of the second arc-shaped pressure plate 1312 are respectively provided with second small arc-shaped pressure plates 1313. The second small arc-shaped pressure plates 1313 are fixed on the second arc-shaped pressure plate 1312 by the second small pivot pin 1315 and rotate around the second small pivot pin 1315.

[0031] Furthermore, the first small arc-shaped pressure plate 1213 and the second small arc-shaped pressure plate 1313 have two independent pressure surfaces, which can fit against two points on the appearance surface of the workpiece, and adaptively compensate for the shape error of the appearance surface of the workpiece to achieve multi-point clamping and positioning of the workpiece.

[0032] Furthermore, such as Figure 5 As shown, in order to make the structure more compact, the layout more reasonable, and the positioning and assembly more convenient and efficient, the clamp base 11 is T-shaped, and the clamp base 11 has slots on both sides that cooperate with the first flip plate base 1211 and the second flip plate base 1311.

[0033] Furthermore, such as Figure 3As shown, in order to drive the rotating clamping unit to rotate and provide power, the rotating power mechanism 14 includes a power component and an automatic alignment pin 141. The automatic alignment pin 141 is provided on the clamp base 11 and slides with it. The power component is located on the outside of the second rotating clamping unit 13. The power component pushes the automatic alignment pin 141 and drives the second pressing flap 131 of the second rotating clamping unit 13 and the first pressing flap 121 of the first rotating clamping unit 12 to rotate and press the workpiece.

[0034] Furthermore, such as Figure 3 As shown, to make the structure more reasonable, the power assembly includes a power source 142 and a push rod 143. The power source 142 is assembled and connected to the second clamping flap 131. The push rod 143 is fixed to the top of the power source 142, and the power source 142 pushes the automatic alignment pin 141 through the push rod 143, thereby pushing the second clamping flap 131 and the first clamping flap 121 to rotate. When either the second clamping flap 131 or the first clamping flap 121 contacts the workpiece, it stops rotating, and the other flap continues to rotate until it contacts the workpiece, thereby generating a clamping force to complete the clamping and positioning of the workpiece.

[0035] Specifically, the automatic alignment pin 141 is located in the transverse elongated through hole of the fixture base 11, and the push rod 143 is located in the through hole of the second flip plate base 1311. The power source 142 drives the push rod 143 to push the automatic alignment pin 141 to move, which counteracts the effect of the corresponding return spring, causing the first flip plate base 1211 to rotate clockwise, that is, the lower end flips outward and the upper end rotates inward toward the workpiece. The second flip plate base 1311 rotates counterclockwise, that is, the lower end flips outward and the upper end rotates inward toward the workpiece, thereby achieving the clamping of the workpiece.

[0036] Furthermore, such as Figure 3 As shown, in order to facilitate the fixing of the power source, the power assembly also includes an adapter plate 144, the power source 142 is fixed on the adapter plate 144, and the adapter plate 144 is fixed on the outer side wall of the second pressing flap 131.

[0037] Furthermore, such as Figure 3 , 4 As shown, in order to facilitate hole positioning of the workpiece, the hole positioning mechanism 2 includes a positioning level block 21, which is fixed on the fixture base 11 by bolts and positioning pins, and is used to position the machining hole of the workpiece.

[0038] Furthermore, such as Figure 4 As shown, the positioning level block 21 is equipped with a positioning round pin 22 to prevent workpiece displacement and a positioning diamond pin 23 to compensate for workpiece positioning.

[0039] Furthermore, such as Figure 1 As shown, in order to achieve batch processing and improve production efficiency, a bearing component 3 is also included. The bearing component 3 includes a clamping base plate 31, on which multiple sets of alignment and clamping mechanisms 1 are arranged in a matrix.

[0040] Furthermore, such as Figure 1 As shown, in order to facilitate the hoisting and transportation of the entire device and improve processing efficiency, the mounting base plate 31 is provided with lifting lugs 311 for easy hoisting.

[0041] Furthermore, in order to improve the positioning combination between the present invention and the equipment operating table, the bottom of the clamping base plate 31 is also provided with a reference positioning pin, a clamping pin and a diamond positioning pin that cooperate with the positioning of the equipment operating table, so as to ensure that the clamping base plate 31 is stable, does not shake or shift relative to the equipment operating table.

[0042] When using this invention, the workpiece is placed on the hole positioning mechanism. After the workpiece is positioned, the flipping power mechanism is driven. The first flipping clamping unit and the second flipping clamping unit rotate to clamp the workpiece. At the same time, the first flipping clamping unit or the second flipping clamping unit contacts the workpiece first and then stops rotating, while the other continues to rotate until both of them contact the workpiece and continue to act to generate clamping force. Meanwhile, the pin hole of the workpiece is not subjected to force. Therefore, the following examples, 1 and 2, will be used as examples for further explanation.

[0043] Example 1: Taking the milling of the upper plane and side of a thin workpiece with two holes as an example, the workpiece is placed on the positioning leveling block 21, and the corresponding positioning round pin 22 and positioning diamond pin 23 are inserted into the holes of the workpiece and the corresponding insertion holes on the positioning leveling block 21 to complete the workpiece positioning process. The hydraulic or pneumatic drive power source 142 is used to extend the push rod 143 and generate a counter-push force after contacting the automatic alignment push pin 141. This drives the first clamping flap 121 and the second clamping flap 131, and counteracts the elastic force of the first return spring 122 and the second return spring 132 to rotate. This causes the first small arc-shaped pressure plate 1213 and the second small arc-shaped pressure plate 1313 to contact the workpiece first. The arc structure automatically compensates for the height difference of the workpiece surface and performs multi-point clamping. At the same time, the first clamping flap 121 or the second clamping flap 131 that contacts the material first will stop rotating, while the other continues to rotate until both of them contact the workpiece and continue to act to generate clamping force. Meanwhile, the pin hole is not under force.

[0044] Example 2: Taking a structural part with mounting holes on both sides and a rough surface around the edges as an example, one side and the corresponding holes have been machined. The other side is machined with a stepped plane and hole features based on the hole positioning. The workpiece is placed on the positioning level block 21, and the corresponding positioning round pins 22 and positioning diamond pins 23 are inserted into the holes of the workpiece and the corresponding insertion holes on the positioning level block 21, respectively, to complete the workpiece positioning process. The hydraulic or pneumatic drive power source 142 is used to extend the push rod 143. After contacting the automatic alignment push pin 141, it generates a counter-thrust force, driving the first clamping. The flip plate 121 and the second pressing flip plate 131 rotate to counteract the elastic force of the first return spring 122 and the second return spring 132, causing the first small arc-shaped pressure plate 1213 and the second small arc-shaped pressure plate 1313 to contact the workpiece first. The arc structure automatically compensates for the height difference of the workpiece surface and performs multi-point pressing. At the same time, the first pressing flip plate 121 or the second pressing flip plate 131 that contacts the material first will stop rotating, while the other will continue to rotate until both of them contact the workpiece and continue to act to generate clamping force. Meanwhile, the pin hole is not under force.

[0045] This invention relates to clamping technology for thickness-direction planar machining and threaded hole machining of sheet metal cutting parts under secondary positioning with holes, and to clamping technology applicable to medium and large structural parts using a two-pin secondary positioning method for milling and drilling operations. Based on the pre-machined holes on the workpiece and the relative positional relationship between the remaining machining features and the holes, the pre-machined holes are used to achieve workpiece positioning. The positioning holes only serve a positioning function; during machining, the positioning holes are not subjected to cutting loads, avoiding extrusion deformation of the pre-machined holes and damage to hole position accuracy, thus ensuring the reliability of the workpiece machining datum. The present invention also has the following advantages: the present invention is not only simple in structure and easy to operate, but can also automatically align the outer contour of the workpiece according to the pre-processed hole position, reduce the manual alignment requirements for workpiece loading and placement, reduce the time spent on manual alignment, improve clamping efficiency, and is suitable for batch production scenarios.

[0046] Furthermore, the clamping device of the present invention separates the positioning and clamping phases, which can compensate for the shape and position errors of the blank surface, has good clamping stability, effectively ensures the relative positional accuracy between subsequent secondary processing features such as milling and drilling and pre-processed holes, and improves the consistency of finished products.

[0047] Meanwhile, the invention has a high degree of integration of its overall structure, is suitable for sheet metal cutting parts and secondary positioning processing of medium and large structural parts, is compatible with one-sided two-pin secondary positioning process, has strong versatility, and is easy to integrate into automated production lines.

[0048] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A pre-hole positioning adaptive automatic alignment clamping device, characterized in that: It includes an automatic alignment clamping mechanism (1) and a hole positioning mechanism (2). The automatic alignment clamping mechanism (1) includes a clamp base (11), a first flip clamping unit (12), a second flip clamping unit (13), and a flip power mechanism (14). The first flip clamping unit (12) and the second flip clamping unit (13) are disposed at both ends of the clamp base (11), and the flip power mechanism (14) is arranged outside the second flip clamping unit (13). At the same time, the flip power mechanism (14) provides flip power to the first flip clamping unit (12) and the second flip clamping unit (13), driving the first flip clamping unit (12) and the second flip clamping unit (13) to flip relative to the clamp base (11). The hole positioning mechanism (2) is located on the top of the fixture base (11) and is used to pre-position the machining hole of the workpiece. Under the driving action of the flipping power mechanism (14), the workpiece on the hole positioning mechanism (2) causes the first flipping clamping unit (12) and the second flipping clamping unit (13) to rotate relative to the fixture base (11) and adaptively compensate for the shape error of the workpiece surface in order to pre-position the workpiece, and to clamp and position the workpiece.

2. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 1, characterized in that: The first flip clamping unit (12) includes a first pressing flip plate (121) and a first return spring (122). The first pressing flip plate (121) is disposed on one side of the clamp base (11) and rotatably connected thereto. The first return spring (122) is disposed on the first pressing flip plate (121), and one end of the first return spring (122) abuts against the side wall of the clamp base (11), and the other end abuts against the end face of the first adjusting bolt (123) provided on the first pressing flip plate (121). The extension and retraction of the first return spring is controlled by tightening the first adjusting bolt (123) to control the elastic force, and the elastic force is applied to the clamp base (11). The second flip clamping unit (13) includes a second pressing flip plate (131) and a second return spring (132). The second pressing flip plate (131) is disposed on the other side of the clamp base (11) and rotatably connected thereto. The second return spring (132) is disposed on the second pressing flip plate (131), and one end of the second return spring (132) abuts against the side wall of the clamp base (11), and the other end abuts against the end face of the second adjusting bolt (133) provided on the second pressing flip plate (131). The extension and retraction of the second return spring is controlled by tightening the second adjusting bolt (133) to control the elastic force, and the elastic force is applied to the clamp base (11). The flipping power mechanism (14) provides flipping power for the first pressing flip plate (121) and the second pressing flip plate (131), and under the action of the first return spring (122) and the second return spring (132), the pressing position of the upper end of the first pressing flip plate (121) and the second pressing flip plate (131) is moved away from the workpiece on the hole positioning mechanism (2) without the push force.

3. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 2, characterized in that: The first pressing flap (121) is rotatably connected to the fixture base (11) via the first flipping shaft (124), and the second pressing flap (131) is rotatably connected to the fixture base (11) via the second flipping shaft (134).

4. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 1, characterized in that: The first pressing flap (121) includes a first flap base (1211), a first arc-shaped pressure plate (1212), a first small arc-shaped pressure plate (1213), a first pivot pin (1214), and a first small pivot pin (1215). The first arc-shaped pressure plate (1212) is disposed in a slot of the first flap base (1211) and is fixed to the first flap base (1211) by the first pivot pin (1214) and rotates around the first pivot pin (1214). The slots at both ends of the first arc-shaped pressure plate (1212) are respectively provided with first small arc-shaped pressure plates (1213). The first small arc-shaped pressure plates (1213) are fixed to the first arc-shaped pressure plate (1212) by the first small pivot pin (1215) and rotate around the first small pivot pin (1215). The second pressing flap (131) includes a second flap base (1311), a second arc-shaped pressure plate (1312), a second small arc-shaped pressure plate (1313), a second pivot pin (1314), and a second small pivot pin (1315). The second arc-shaped pressure plate (1312) is disposed in a slot of the second flap base (1311) and is fixed on the second flap base (1311) by the second pivot pin (1314) and rotates around the second pivot pin (1314). The slots at both ends of the second arc-shaped pressure plate (1312) are respectively provided with second small arc-shaped pressure plates (1313). The second small arc-shaped pressure plates (1313) are fixed on the second arc-shaped pressure plate (1312) by the second small pivot pin (1315) and rotate around the second small pivot pin (1315).

5. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 4, characterized in that: The first small arc-shaped pressure plate (1213) and the second small arc-shaped pressure plate (1313) have two independent pressure surfaces, which can always be in contact with two points on the appearance surface of the workpiece, and adaptively compensate for the shape error of the appearance surface of the workpiece to achieve multi-point clamping and positioning of the workpiece.

6. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 4, characterized in that: The clamp base (11) is T-shaped in general, and the clamp base (11) has slots on both sides that cooperate with the first flip plate base (1211) and the second flip plate base (1311).

7. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 1, characterized in that: The flipping power mechanism (14) includes a power component and an automatic alignment pin (141). The automatic alignment pin (141) is located on the fixture base (11) and slides therewith. The power component is located on the outside of the second flipping clamping unit (13). The power component pushes the automatic alignment pin (141) and drives the second pressing flap (131) of the second flipping clamping unit (13) and the first pressing flap (121) of the first flipping clamping unit (12) to rotate and press the workpiece.

8. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 7, characterized in that: The power assembly includes a power source (142) and a push rod (143). The power source (142) is assembled and connected to the second clamping flap (131). The push rod (143) is fixed at the top of the power source (142). The power source (142) pushes the automatic alignment pin (141) through the push rod (143), thereby pushing the second clamping flap (131) and the first clamping flap (121) to rotate. When either the second clamping flap (131) or the first clamping flap (121) contacts the workpiece, it stops rotating. The other flap continues to rotate until it contacts the workpiece, thereby generating a clamping force to complete the clamping and positioning of the workpiece.

9. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 8, characterized in that: The power assembly also includes an adapter plate (144), the power source (142) is fixed on the adapter plate (144), and the adapter plate (144) is fixed on the outer wall of the second pressing flap (131).

10. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 1, characterized in that: The hole positioning mechanism (2) includes a positioning level block (21), which is fixed to the fixture base (11) by bolts and positioning pins, and is used to position the machining hole of the workpiece.

11. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 10, characterized in that: The positioning level block (21) is fitted with a positioning round pin (22) to prevent workpiece displacement and a positioning diamond pin (23) to compensate for workpiece positioning.

12. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 1, characterized in that: It also includes a bearing component (3), which includes a clamping base plate (31) and multiple sets of alignment and clamping mechanisms (1) arranged in a matrix on the clamping base plate (31).

13. The pre-hole positioning adaptive automatic alignment special clamping device according to claim 12, characterized in that: The mounting base plate (31) is provided with lifting lugs (311) for easy hoisting.

14. The pre-hole positioning adaptive automatic alignment clamping device according to claim 12, characterized in that: The bottom of the clamping base plate (31) is also provided with a reference positioning pin, a clamping pin and a diamond positioning pin that cooperate with the positioning of the equipment operating table, so as to ensure that the clamping base plate (31) is stable, does not shake or shift relative to the equipment operating table.

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