Clamp device for large workpiece

Abstract

The invention discloses a clamp device for a large workpiece, the clamp device comprises a main body support frame, an assembly cradle, a bearing seat, an asynchronous variable frequency brake motor, a gear reducer and a locking device, the main body support frame comprises a cradle mounting part and a motor mounting part; the assembling cradle comprises two swing arms and a supporting seat, the supporting seat is fixedly provided with a large workpiece, the bottoms of the two swing arms are connected with the supporting seat, and the tops of the two swing arms are connected with inner rings of bearings in the bearing seats through a long connecting shaft and a short connecting shaft respectively; the outer ring of the bearing is fixed with the bearing seat; the asynchronous variable-frequency brake motor and the gear reducer are fixed on the motor mounting part, the long connecting shaft is connected with the output end of the gear reducer, and a rotor of the asynchronous variable-frequency brake motor is connected with the input end of the gear reducer; the short connecting shaft is connected with a locking device, and the locking device is fixed to the main body supporting frame. The device is stable in swinging, and higher safety guarantee is provided by adopting a motor band-type brake mode and a manual locking band-type brake mode.

Description

Technical Field

[0001] The invention relates to a clamping device for a large workpiece. Background Art

[0002] CNC machine tools are equipment that uses computer control systems to automate machine tool processing. It controls the machine tool to perform processing operations such as cutting, drilling, milling, etc. through pre-set programs and instructions, thereby achieving high-precision and high-efficiency processing processes. CNC machine tools are widely used in the manufacturing industry and can process various metal and non-metal materials, such as steel, aluminum alloys, plastics, etc., with the advantages of strong flexibility, high processing accuracy, and high production efficiency.

[0003] The development trends of CNC machine tools include: Intelligence: With the development of technologies such as artificial intelligence, big data, and cloud computing, CNC machine tools will become more and more intelligent, able to realize functions such as automated production and automatic fault diagnosis.

[0004] Improvement of precision and speed: With the continuous development of CNC technology, the processing precision and speed of CNC machine tools will continue to improve, and can meet higher processing requirements.

[0005] Multifunctionality: Future CNC machine tools will have more processing functions, be able to switch between multiple processing methods, and improve production efficiency.

[0006] Green and environmental protection: With the enhancement of environmental awareness, CNC machine tools will pay more and more attention to energy conservation and emission reduction, and adopt more environmentally friendly processing methods and materials.

[0007] Personalized customization: With the diversification of market demand, CNC machine tools will develop more and more in the direction of personalized customization, and can meet the processing needs of different industries and different products.

[0008] Networking: CNC machine tools will be combined with the Internet, the Internet of Things and other technologies to realize functions such as remote monitoring and remote maintenance, and improve production efficiency and management level.

[0009] In existing CNC machine tools, the cutting fluid used in the CNC machine tools has the defect that it cannot be monitored and managed, resulting in the inability to control the quality of the cutting fluid, thus affecting the processing quality.

[0010] In recent years, rotary tables have been widely used in the manufacturing industry. The fixtures of large workpieces in CNC machine tools (such as machine tool castings, swing head workpieces, etc.) are all fixed. When the workpiece needs to be flipped over for assembly or repair, it needs to be flipped with the help of a crane. During the flipping process, the workpiece may tip over, causing harm to people. Summary of the invention

[0011] The technical problem to be solved by the present invention is to overcome the defects of poor safety and inability to rotate of machine tool fixtures in the prior art, and to provide a fixture device for large workpieces that has stable swing and provides higher safety protection by using both motor brake and manual locking brake.

[0012] The present invention solves the above technical problems through the following technical solutions: A fixture device for large workpieces, characterized in that the fixture device includes a main support frame, an assembly cradle, two bearing seats, an asynchronous variable frequency brake motor, a gear reducer and a locking device. The main support frame includes a cradle mounting portion and a motor mounting portion, the cradle mounting portion includes two support columns, the assembly cradle is installed between the support columns, and a mounting platform is provided on the top of the support columns; The assembly cradle comprises two swing arms and a support seat, the support seat is used to fix the large workpiece, the bottoms of the two swing arms are connected to the support seat, and the tops of the two swing arms are connected to the inner ring of the bearing in the bearing seat through a long connecting shaft and a short connecting shaft respectively; The outer ring of the bearing is fixed to the bearing seat, and the two bearing seats are respectively fixed on the mounting platform; The asynchronous variable frequency brake motor and the gear reducer are fixed to the motor mounting portion, the long connecting shaft is connected to the output end of the gear reducer, and the rotor of the asynchronous variable frequency brake motor is connected to the input end of the gear reducer; The short connecting shaft is connected to a locking device, and the locking device is used to be fixed to the main support frame by means of locking screws.

[0013] Preferably, the bearing seat includes a main body and two seat fixing parts, the two seat fixing parts are respectively arranged on both sides of the seat main body, a cylindrical countersunk hole is provided on the side of the seat main body, the cylindrical countersunk hole is fixed to the outer ring of the bearing, the seat fixing part is fixed to the mounting platform by bolts, and a wear pad is provided between the mounting platform and the seat fixing part.

[0014] Preferably, a bearing spacer is provided between the bottom of the cylindrical countersunk hole and the bearing, and the bearing spacer adjusts the axial angle of the bearing.

[0015] Preferably, the outer ring of the bearing is radially positioned with the side wall of the cylindrical countersunk hole, and the inner end surface of the bearing is axially positioned with the bearing spacer and the bottom of the cylindrical countersunk hole.

[0016] Preferably, an outer side of the bearing on the short connecting shaft is provided with an external thread, and the external thread cooperates with a fastening nut to fasten the inner ring of the bearing on one side of the short connecting shaft; An outer side of the bearing on the long connecting shaft is provided with an external thread, and the external thread cooperates with a fastening nut to fasten the inner ring of the bearing on one side of the long connecting shaft.

[0017] Preferably, an anti-loosening washer is provided between the fastening nut and the inner ring of the bearing, a foot assembly is provided at the bottom of the main support frame, and a nylon gasket is provided between the support seat and the large workpiece.

[0018] Preferably, the locking device includes a manual locking disk, the middle part of which is fixed to the outer end surface of the short connecting shaft by bolts, and a fixing groove is provided on the periphery of the manual locking disk, which is fixed to the main support frame on one side of the cradle mounting part by bolts.

[0019] Preferably, the periphery of the fixing groove of the manual locking disk is provided with an angle code, and the clamp device also includes a control electrical box, which is arranged on the main support frame close to the cradle mounting part. The control electrical box includes a camera and an electric bolt tightening device, and the blade of the electric bolt tightening device is aligned with the bolt on the fixing groove. A control panel is provided on the outside of the control electrical box, and the control panel is used to control the asynchronous variable frequency brake motor and the electric bolt tightening device.

[0020] Preferably, the fixture device further comprises a processing module, the lens of the camera is aligned with the angle code, the camera is fixed to the main support frame, and the camera is used to capture the angle-coded image and transmit it to the processing module. The processing module is used to identify the angle code in the image and obtain the angle of assembling the cradle according to the angle code; The processing module is also used to compare the image with the angle-coded image of the assembly cradle when it is unloaded, and obtain the horizontality of the support seat by comparing the pixel difference and the angle of the assembly cradle after assembling the large workpiece, and output the adjustment amount of the bearing spacer according to the horizontality.

[0021] Based on the common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily to obtain the preferred embodiments of the present invention.

[0022] The positive and progressive effects of the present invention are: In order to overcome the safety deficiencies of existing tooling fixtures when flipping workpieces, the present invention provides a flippable tooling fixture, which not only allows the workpiece to rotate stably on the axis of the fixture, but also has two safety guarantees: a motor brake and a manual locking brake. The installation height is also more ergonomic, allowing assembly engineers to install more efficiently.

[0023] The technical solution adopted by the present invention to solve the technical problem is: using a variable frequency speed regulating electromagnetic brake three-phase asynchronous motor as a drive connected to a gear reducer as an output shaft to drive the rotating part of the cradle.

[0024] The locking surface is designed as a cradle, which can lower the center of gravity of the workpiece when it is installed. When rotating, the center of gravity of the workpiece is as close to the center of the rotating axis as possible, making the tooling more stable.

[0025] A manual locking mechanism is provided at the end of the cradle, which can rotate the workpiece to any angle and lock it with screws, so that the workpiece can be rotated to any angle for work, increasing the safety of the tooling.

[0026] Furthermore, the present application can obtain the rotation angle, and use the rotation angle to obtain the horizontality, adjust the horizontality of the swing arm, and improve the accuracy of the swing and the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a clamping device for a large workpiece according to Example 1 of the present invention.

[0028] Figure 2 This is another schematic structural diagram of the clamping device for large workpieces according to Example 1 of the present invention.

[0029] Figure 3 This is another schematic structural diagram of the clamping device for large workpieces according to Example 1 of the present invention.

[0030] Figure 4 This is a schematic diagram of the partial structure of a clamping device for a large workpiece according to Example 1 of the present invention. DETAILED DESCRIPTION

[0031] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples. Example

[0032] In this embodiment, the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] See also Figures 1 to 4 This embodiment provides a fixture device for a large workpiece, which includes a main support frame 11, an assembly cradle 12, two bearing seats 13, an asynchronous variable frequency brake motor 14, a gear reducer 15 and a locking device 16.

[0034] The main support frame 11 includes a cradle mounting portion and a motor mounting portion. The cradle mounting portion includes two support columns 111 . The assembly cradle 12 is installed between the support columns 111 . A mounting platform 112 is provided on the top of the support columns 111 .

[0035] The assembly cradle 12 includes two swing arms 121 and a support seat 122. The support seat 122 fixes the large workpiece 18. The bottoms of the two swing arms 121 are connected to the support seat 122, and the tops of the two swing arms 121 are connected to the inner ring of the bearing 131 in the bearing seat 13 through a long connecting shaft 123 and a short connecting shaft 124 respectively.

[0036] The outer ring of the bearing 131 is fixed to the bearing seat 13 , and the two bearing seats 13 are respectively fixed on the mounting platform 112 .

[0037] The bearing 131 of this embodiment is a deep groove ball bearing with end face sealing, and an adjusting top block 137 is provided on the side of the bearing seat 13 .

[0038] The asynchronous variable frequency brake motor 14 and the gear reducer 15 are fixed to the motor mounting portion, the long connecting shaft 123 is connected to the output end of the gear reducer 15 , and the rotor of the asynchronous variable frequency brake motor 14 is connected to the input end of the gear reducer 15 .

[0039] The short connecting shaft 124 is connected to the locking device 16 , and the locking device 16 is used to be fixed to the main support frame 11 by using locking screws.

[0040] The bearing seat 13 includes a seat body and two seat fixing members, and the two seat fixing members are respectively arranged on both sides of the seat body.

[0041] A cylindrical countersunk hole is provided on the side of the seat body, and the cylindrical countersunk hole is fixed to the outer ring of the bearing 131. The seat fixing part is fixed to the mounting platform 112 by bolts, and a wear pad is provided between the mounting platform 112 and the seat fixing part.

[0042] A bearing spacer 136 is provided between the bottom of the cylindrical counterbore and the bearing 131 , and the bearing spacer adjusts the axial angle of the bearing 131 .

[0043] The outer ring of the bearing is radially positioned with the side wall of the cylindrical countersunk hole, and the inner end surface of the bearing is axially positioned with the bearing spacer and the bottom of the cylindrical countersunk hole.

[0044] The outer side of the bearing on the short connecting shaft 124 is provided with an external thread, and the external thread cooperates with the fastening nut 132 to fasten the inner ring of the bearing on one side of the short connecting shaft 124; The outer side of the bearing on the long connecting shaft 123 is provided with an external thread, and the external thread cooperates with the fastening nut 132 to fasten the inner ring of the bearing on one side of the long connecting shaft 123.

[0045] An anti-loosening washer 133 is provided between the fastening nut 132 and the inner ring of the bearing.

[0046] A base assembly 17 is provided at the bottom of the main support frame 11 , and a nylon gasket 125 is provided between the support seat 122 and the large workpiece.

[0047] The locking device 16 includes a manual locking disk 161 , the middle portion of which is fixed to the outer end surface of the short connecting shaft 124 via bolts.

[0048] The manual locking disc 161 is provided with a fixing groove on its periphery, and the fixing groove is fixed to a locking strip 113 on the main support frame 11 at one side of the cradle mounting portion by bolts.

[0049] Angle coding is provided on the periphery of the fixing groove of the manual locking disk 161 .

[0050] The clamp device further comprises a control electric box (not shown in the figure), which is arranged on the main support frame 11 close to the cradle mounting portion (ie, on the support column 111 away from the asynchronous variable frequency brake motor).

[0051] The control electric box includes a camera and an electric bolt tightening device.

[0052] The cutter head of the electric bolt tightening device is aligned with the bolt on the fixing groove, and a control panel is provided on the outer side of the control box.

[0053] The control panel is used to control the asynchronous variable frequency brake motor 14 and the electric bolt tightening device.

[0054] The fixture device further includes a processing module, the lens of the camera is aligned with the angle code, the camera is fixed to the main support frame 11, and the camera is used to shoot the angle-coded image and transmit it to the processing module. The processing module is used to identify the angle code in the image and obtain the angle of the assembly cradle 12 according to the angle code; The processing module is also used to compare the image with the angle-coded image of the assembly cradle 12 when it is unloaded, and obtain the horizontality of the support seat 122 by comparing the pixel difference and the angle of the assembly cradle 12 after assembling the large workpiece, and output the adjustment amount of the bearing spacer according to the horizontality.

[0055] The clamp device is used in the following manner: Install the large workpiece on the assembly cradle 12 and fix it on the support base 122; The assembly cradle is rotated to the target angle by using an asynchronous variable frequency brake motor; Tighten the bolts on the manual locking plate 161. The bolts of the manual locking plate can be tightened manually or by an electric bolt tightening device; When the assembly cradle is rotating, the lens of the camera is aligned with the angle code, and the angle-coded image is captured and transmitted to the processing module; The processing module identifies the angle code in the image and obtains the angle at which the cradle 12 is assembled according to the angle code; The processing module also compares the image with the angle-coded image of the assembly cradle 12 when it is unloaded, and obtains the horizontality of the support seat 122 by comparing pixel differences and the angle of the assembly cradle 12 after assembling a large workpiece, and outputs the adjustment amount of the bearing spacer based on the horizontality.

[0056] Determine whether the bearing spacer needs to be adjusted immediately based on the actual situation. If not, the bearing spacer can be adjusted using the adjustment amount when processing the next large workpiece.

[0057] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A fixture for large workpieces, It is characterized in that The clamp device includes a main support frame, an assembly cradle, two bearing seats, an asynchronous variable frequency brake motor, a gear reducer and a locking device. The main support frame includes a cradle mounting portion and a motor mounting portion, the cradle mounting portion includes two support columns, the assembly cradle is installed between the support columns, and a mounting platform is provided on the top of the support columns; The assembly cradle comprises two swing arms and a support seat, the support seat is used to fix the large workpiece, the bottoms of the two swing arms are connected to the support seat, and the tops of the two swing arms are connected to the inner ring of the bearing in the bearing seat through a long connecting shaft and a short connecting shaft respectively; The outer ring of the bearing is fixed to the bearing seat, and the two bearing seats are respectively fixed on the mounting platform; The asynchronous variable frequency brake motor and the gear reducer are fixed to the motor mounting portion, the long connecting shaft is connected to the output end of the gear reducer, and the rotor of the asynchronous variable frequency brake motor is connected to the input end of the gear reducer; The short connecting shaft is connected to a locking device, and the locking device is used to be fixed to the main support frame by means of locking screws.

2. The fixture device for a large workpiece according to claim 1, It is characterized in that The bearing seat includes a main body and two seat fixing parts, the two seat fixing parts are respectively arranged on both sides of the seat main body, a cylindrical countersunk hole is provided on the side of the seat main body, the cylindrical countersunk hole is fixed to the outer ring of the bearing, the seat fixing part is fixed to the mounting platform by bolts, and a wear pad is provided between the mounting platform and the seat fixing part.

3. The fixture device for a large workpiece according to claim 2, It is characterized in that A bearing spacer is provided between the bottom of the cylindrical countersunk hole and the bearing, and the bearing spacer adjusts the axial angle of the bearing.

4. The fixture device for a large workpiece according to claim 3, It is characterized in that The outer ring of the bearing is radially positioned with the side wall of the cylindrical countersunk hole, and the inner end surface of the bearing is axially positioned with the bearing spacer and the bottom of the cylindrical countersunk hole.

5. The fixture device for a large workpiece according to claim 3, It is characterized in that The outer side of the bearing on the short connecting shaft is provided with an external thread, and the external thread cooperates with the fastening nut to fasten the inner ring of the bearing on one side of the short connecting shaft; An outer side of the bearing on the long connecting shaft is provided with an external thread, and the external thread cooperates with a fastening nut to fasten the inner ring of the bearing on one side of the long connecting shaft.

6. The fixture device for a large workpiece according to claim 5, It is characterized in that An anti-loosening washer is arranged between the fastening nut and the inner ring of the bearing.

7. The fixture device for a large workpiece according to claim 5, It is characterized in that A foot assembly is provided at the bottom of the main support frame, and a nylon gasket is provided between the support seat and the large workpiece.

8. The large workpiece clamping device according to claim 1, It is characterized in that The locking device includes a manual locking disk, the middle part of which is fixed to the outer end surface of the short connecting shaft by bolts, and a fixing groove is provided on the periphery of the manual locking disk, which is fixed to the main support frame on one side of the cradle mounting part by bolts.

9. The large workpiece clamping device according to claim 8, It is characterized in that An angle code is provided on the periphery of the fixing groove of the manual locking disk. The clamp device also includes a control electrical box, which is arranged on the main support frame close to the cradle mounting part. The control electrical box includes a camera and an electric bolt tightening device. The blade head of the electric bolt tightening device is aligned with the bolt on the fixing groove. A control panel is provided on the outside of the control electrical box, and the control panel is used to control the asynchronous variable frequency brake motor and the electric bolt tightening device.

10. The large workpiece clamping device according to claim 9, It is characterized in that The fixture device also includes a camera lens aligned with the angle code, the camera is fixed to the main support frame, and the camera is used to capture the angle-coded image and transmit it to the processing module. The method is used to identify the angle code in the image and obtain the angle of assembling the cradle according to the angle code; The device is also used to compare the image with the angle-coded image of the assembly cradle when it is unloaded, obtain the horizontality of the support seat by comparing the pixel difference and the angle of the assembly cradle after assembling the large workpiece, and output the adjustment amount of the bearing spacer based on the horizontality.

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