An automatic screw assembly and disassembly machine for CNC fixtures

Abstract

The present invention relates to the technical field of screw assembly and disassembly, and discloses an automatic screw assembly and disassembly machine for CNC fixtures, comprising a workbench, a fixed bracket fixedly connected to the top of the workbench, a disassembly and assembly device fixedly connected to the top of the fixed bracket, and a positioning device fixedly connected to the center position of the top of the workbench; the disassembly and assembly device comprises a fixed seat, a hydraulic telescopic rod passes through and is fixedly connected to the fixed seat, a rotating seat is fixedly connected to the bottom of the hydraulic telescopic rod, a rotating groove is opened on the side of the rotating seat, and a rotating support rod is fixedly connected to the inner wall of the rotating groove through a rotating bolt. The automatic screw assembly and disassembly machine for CNC fixtures can be used with fixtures of different models, and does not need to replace parts during use. It is convenient to use and has low maintenance costs. In addition, multiple groups of disassembly and assembly mechanisms are provided, and the multiple groups of disassembly and assembly mechanisms can adjust their positions independently, which is convenient for disassembling and assembling multiple groups of screws at the same time, and has high processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of screw assembly and disassembly, in particular to an automatic screw assembly and disassembly machine for a CNC fixture. Background Art

[0002] CNC fixture is a device used to clamp workpieces and guide tools on machine tools. It refers to a fixture specially designed for a certain process of a certain workpiece. It is characterized by compact structure, quick, convenient and labor-saving operation, and can ensure high processing accuracy and production efficiency, but the design and manufacturing cycle is long and the manufacturing cost is also high. When the product changes, the fixture will be scrapped because it can no longer be used. It is only suitable for production with fixed products and large batches. It contacts the positioning reference of the workpiece to determine the correct position of the workpiece in the fixture, thereby ensuring the relative correct position of the workpiece relative to the tool and the machine tool processing movement during processing. Some CNC fixtures fix the product with screws to facilitate processing. After the processing is completed, the screws are removed to remove the product from the CNC fixture.

[0003] The currently used assembly and disassembly devices are usually not convenient for adapting to different types of clamps. When the shape of the clamp changes, the assembly and disassembly device needs to replace corresponding parts to complete the adaptation, which is inconvenient to use and has high production and maintenance costs. Summary of the invention

[0004] To achieve the above purpose, the present invention is implemented by the following technical solutions: an automatic screw assembly and disassembly machine for CNC fixtures, comprising a workbench, a fixed bracket is fixedly connected to the top of the workbench, a disassembly device is fixedly connected to the top of the fixed bracket, and a positioning device is fixedly connected to the center of the top of the workbench;

[0005] The disassembly and assembly device comprises a fixed seat, the fixed seat passes through and is fixedly connected with a hydraulic telescopic rod, the bottom of the hydraulic telescopic rod is fixedly connected with a rotating seat, a rotating groove is opened on the side of the rotating seat, the inner wall of the rotating groove is fixedly connected with a rotating support rod through a rotating bolt, the top of the inner wall of the rotating groove passes through and is threadedly connected with a threaded push rod, and the bottom of the threaded push rod is fixedly connected with a clamping plate, one end of the rotating support rod extends to the outside of the rotating groove and is fixedly connected with the telescopic rod, and the end of the telescopic rod away from the rotating support rod is fixedly connected with an assembly and disassembly mechanism, which does not need to replace parts during use, is relatively convenient to use, and has low maintenance costs, and multiple groups of disassembly mechanisms are provided, and the multiple groups of disassembly mechanisms can adjust their positions independently, which is convenient for disassembling and assembling multiple groups of screws at the same time, and has high processing efficiency.

[0006] Preferably, the fixing seat is fixedly connected to the fixing bracket, and the rotating grooves are provided in multiple groups and are evenly distributed on the rotating seat.

[0007] Preferably, a rotating handle is fixedly connected to the top of the threaded push rod, and a friction pad is provided at the bottom of the clamping plate.

[0008] Preferably, the assembly and disassembly mechanism includes a sleeve, the top of the sleeve is fixedly connected to a driving motor, the driving shaft of the driving motor passes through the sleeve and extends into the interior of the sleeve, the end of the driving shaft of the driving motor is fixedly connected to a square tube, the inner wall of the square tube is slidably connected to a sliding rod, the top of the sliding rod is fixedly connected to an extrusion spring, the end of the extrusion spring away from the sliding rod is fixedly connected to the top of the inner wall of the square tube, the bottom of the sliding rod is fixedly connected to a screwdriver head, the side of the sleeve passes through and is rotatably connected to a limiting baffle, the top and bottom of one end of the limiting baffle located outside the sleeve are fixedly connected to an arc spring, which can prevent the screw column from falling off from the inside of the assembly and disassembly mechanism after disassembly, facilitates the subsequent re-installation of the screw column into the fixture, and is not easy to fall off due to the vibration of the device during operation, and has good stability.

[0009] Preferably, one side of the sleeve is fixedly connected to the end of the telescopic rod, and the shape of the sliding rod is adapted to the shape of the inner wall of the square tube.

[0010] Preferably, an arc-shaped notch is formed at one end of the limit baffle located inside the sleeve, and one end of the arc-shaped spring away from the limit baffle is fixedly connected to the side surface of the sleeve.

[0011] Preferably, the positioning device includes a positioning base and a wave plate, a positioning groove is provided on the top of the positioning base, a telescopic push rod is fixedly connected to the side surface of the inner wall of the positioning groove, the end of the telescopic push rod away from the side surface of the inner wall of the positioning groove is rotatably connected to the fixing part of the rotating seat, and a sliding clamping plate is fixedly connected to the side surface of the rotating part of the rotating seat, and a limiting slide bar is fixedly connected to one side of the wave plate, and a limiting slide groove is provided on the side of the limiting slide bar away from the wave plate, so that the clamp can be fixed more stably, and the protruding part on the side of the wave plate is relatively smooth and not easy to cause damage to the clamp, so it is safe and reliable to use, and the inclination angle can be freely adjusted according to the shape of the clamp, so it is convenient to adapt to the use of clamps of different models and shapes, and has good adaptability.

[0012] Preferably, the bottom of the positioning base is fixedly connected to the top of the workbench, and the telescopic push rods are provided in multiple groups and are evenly distributed on the inner wall of the positioning groove.

[0013] Preferably, the sliding card is arranged inside the limiting slide groove and is slidably connected to the inner wall of the limiting slide groove, and oblique support rods are fixedly connected to both sides of the fixed part of the telescopic push rod, and one end of the oblique support rod away from the telescopic push rod is fixedly connected to the inner wall of the positioning groove.

[0014] The present invention provides an automatic screw assembly and disassembly machine for CNC fixtures. It has the following beneficial effects:

[0015] 1. The automatic screw assembly and disassembly machine for CNC fixtures, when in use, places the fixture to be assembled and disassembled on the positioning device, drives the positioning seat to descend through the hydraulic telescopic rod, drives the rotating support rod inside the rotating groove to descend, the rotating support rod drives the telescopic rod to descend, the telescopic rod drives the assembly and disassembly mechanism to descend, and presses the assembly and disassembly mechanism down onto the fixture, so that the screws on the fixture can be assembled and disassembled through the assembly and disassembly mechanism. When the model of the fixture changes, the position of the screws on it will also change accordingly. At this time, the threaded push rod is loosened, and then the rotating support rod inside the rotating groove is rotated, the rotating support rod drives the telescopic rod to rotate, and the telescopic rod drives the assembly and disassembly mechanism to rotate, and the assembly and disassembly mechanism is rotated to a suitable position, and then the assembly and disassembly mechanism is driven to move by the telescopic rod, so that the assembly and disassembly mechanism is moved to a position facing the screw hole, so that it can be suitable for different types of fixtures for use, and there is no need to replace parts during use, which is convenient to use and has low maintenance cost. In addition, multiple assembly and disassembly mechanisms are provided, and the multiple assembly and disassembly mechanisms can adjust their positions independently, which is convenient for disassembling and assembling multiple groups of screws at the same time, and the processing efficiency is high.

[0016] 2. The automatic screw assembly and disassembly machine for CNC fixtures, during the process of the assembly and disassembly mechanism descending, the bottom of the sleeve is sleeved on the outside of the screw column on the fixture, due to the elastic force of the extrusion spring, the slide bar with the screwdriver head extends out of the sleeve in the initial state, and the sleeve can drive the screwdriver head to be squeezed onto the screw column during the descending process. Under the extrusion force of the screw column, the screwdriver head moves upward and drives the slide bar to compress the extrusion spring, and then drives the square tube to rotate through the driving motor, the square tube drives the slide bar to rotate, and the slide bar drives the screwdriver head to rotate, and the screw column on the fixture can be twisted out through the screwdriver head. In the process of being twisted out, the screw column gradually moves upward and squeezes the limit baffle. The limit baffle rotates under the action of the extrusion force and makes room for the screw column. After the protruding part of the top of the screw column passes over the limit baffle and moves above the limit baffle, the protruding part on the screw column can be stuck out through the limit baffle, so as to avoid the screw column falling from the inside of the assembly and disassembly mechanism after the disassembly technology, and it is convenient to install the screw column into the fixture again later.

[0017] 3. The automatic screw assembly and disassembly machine for CNC fixtures can clamp the screw column between the limit baffle and the screwdriver head through the cooperation of the limit baffle and the screwdriver head, so that the removed screw column can be tightly fixed and is not easy to fall off due to the vibration of the device, and has good stability.

[0018] 4. The automatic screw assembly and disassembly machine for CNC fixtures is equipped with a positioning device, which facilitates the fixing of the fixture more stably. The protruding part of the side of the wave plate is relatively smooth, which is not easy to cause damage to the fixture. It is safe and reliable to use. A sliding card plate and a limiting slide groove are also provided. When the shape of the fixture changes, the telescopic push rods at both ends of the wave plate can be extended to different lengths, so that the wave plate can be tilted inside the positioning groove. The tilt angle can be freely adjusted according to the shape of the fixture, which is convenient for adapting to the use of fixtures of different models and shapes, and has good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the automatic screw assembly and disassembly machine for CNC fixtures of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection structure of the disassembly and assembly device of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the disassembly and assembly device of the present invention;

[0022] Figure 4 This is a schematic diagram of the assembly and disassembly mechanism structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the internal structure of the assembly and disassembly mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the positioning device of the present invention;

[0025] Figure 7 It is a schematic diagram of the connection structure of the limit slide bar of the present invention.

[0026] In the figure: 1. workbench; 2. fixed bracket; 3. disassembly and assembly device; 31. fixed seat; 32. hydraulic telescopic rod; 33. positioning seat; 34. rotating groove; 35. rotating support rod; 36. threaded push rod; 37. clamping plate; 38. telescopic rod; 39. assembly and disassembly mechanism; 391. sleeve; 392. driving motor; 393. square cylinder; 394. slide bar; 395. extrusion spring; 396. screwdriver head; 397. limit baffle; 398. arc spring; 4. positioning device; 41. positioning base; 42. wave plate; 43. positioning groove; 44. telescopic push rod; 45. rotating seat; 46. sliding card plate; 47. limit slide bar; 48. limit slide groove; 49. oblique support rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 5 The present invention provides a technical solution: an automatic screw assembly and disassembly machine for CNC fixtures, comprising a workbench 1, a fixed bracket 2 is fixedly connected to the top of the workbench 1, a disassembly and assembly device 3 is fixedly connected to the top of the fixed bracket 2, and a positioning device 4 is fixedly connected to the center position of the top of the workbench 1;

[0029] The disassembling and assembling device 3 comprises a fixed seat 31, a hydraulic telescopic rod 32 passes through and is fixedly connected to the fixed seat 31, a positioning seat 33 is fixedly connected to the bottom of the hydraulic telescopic rod 32, a rotating groove 34 is opened on the side of the positioning seat 33, a rotating support rod 35 is fixedly connected to the inner wall of the rotating groove 34 through a rotating bolt, a threaded push rod 36 passes through and is threadedly connected to the top of the inner wall of the rotating groove 34, a pressing plate 37 is fixedly connected to the bottom of the threaded push rod 36, one end of the rotating support rod 35 extends to the outside of the rotating groove 34 and is fixedly connected to the telescopic rod 38, and the end of the telescopic rod 38 away from the rotating support rod 35 is fixedly connected to the assembly and disassembly mechanism 39, the fixed seat 31 is fixedly connected to the fixed bracket 2, a plurality of rotating grooves 34 are provided and are evenly distributed on the positioning seat 33, a rotating handle is fixedly connected to the top of the threaded push rod 36, and a friction pad is provided at the bottom of the pressing plate 37;

[0030] When in use, the fixture to be assembled and disassembled is placed on the positioning device 4, and the positioning seat 33 is driven to descend by the hydraulic telescopic rod 32, and the positioning seat 33 drives the rotating support rod 35 inside the rotating groove 34 to descend, and the rotating support rod 35 drives the telescopic rod 38 to descend, and the telescopic rod 38 drives the assembly and disassembly mechanism 39 to descend, and the assembly and disassembly mechanism 39 is pressed down onto the fixture, and the screws on the fixture can be assembled and disassembled by the assembly and disassembly mechanism 39. When the model of the fixture changes, the position of the screws on it will also change accordingly. At this time, the threaded push rod 36 is loosened, and then the internal rotation of the rotating groove 34 is rotated. The support rod 35 is rotated to drive the telescopic rod 38 to rotate, and the telescopic rod 38 drives the assembly and disassembly mechanism 39 to rotate, and the assembly and disassembly mechanism 39 is rotated to a suitable position, and then the assembly and disassembly mechanism 39 is driven to move by the telescopic rod 38, so that the assembly and disassembly mechanism 39 is moved to a position facing the screw hole, so that it can be used for different types of clamps, and there is no need to replace parts during use, which is convenient to use and has low maintenance costs. In addition, multiple groups of disassembly mechanisms 39 are set, and the positions of the multiple groups of disassembly mechanisms 39 can be adjusted independently, which is convenient for disassembling and assembling multiple groups of screws at the same time, and the processing efficiency is high;

[0031] The assembly and disassembly mechanism 39 comprises a sleeve 391, a driving motor 392 is fixedly connected to the top of the sleeve 391, a driving shaft of the driving motor 392 passes through the sleeve 391 and extends into the sleeve 391, a square cylinder 393 is fixedly connected to the end of the driving shaft of the driving motor 392, a sliding rod 394 is slidably connected to the inner wall of the square cylinder 393, a pressing spring 395 is fixedly connected to the top of the sliding rod 394, an end of the pressing spring 395 away from the sliding rod 394 is fixedly connected to the top of the inner wall of the square cylinder 393, and the bottom of the sliding rod 394 is fixedly connected to the There is a screwdriver head 396, and the side of the sleeve 391 penetrates and is rotatably connected to a limit baffle 397. The top and bottom of one end of the limit baffle 397 located outside the sleeve 391 are fixedly connected with an arc spring 398. One side of the sleeve 391 is fixedly connected to the end of the telescopic rod 38. The shape of the sliding rod 394 is adapted to the shape of the inner wall of the square tube 393. An arc-shaped notch is opened at one end of the limit baffle 397 located inside the sleeve 391, and the end of the arc spring 398 away from the limit baffle 397 is fixedly connected to the side of the sleeve 391;

[0032] During the descent of the assembly and disassembly mechanism 39, the bottom of the sleeve 391 is sleeved on the outside of the screw column on the fixture. Due to the elastic force of the extrusion spring 395, the slide bar 394 with the screwdriver head 396 extends out of the sleeve 391 in the initial state. During the descent of the sleeve 391, it can drive the screwdriver head 396 to be squeezed onto the screw column. Under the extrusion force of the screw column, the screwdriver head 396 moves upward and drives the slide bar 394 to compress the extrusion spring 395. Then, the square cylinder 393 is driven to rotate by the driving motor 392, and the square cylinder 393 drives the slide bar 394 to rotate. The slide bar 394 drives the screwdriver head 396 to rotate, and the screw column on the fixture can be twisted out by the screwdriver head 396. In the process of being twisted out The limit baffle 397 gradually moves upward and squeezes the limit baffle 397. Under the action of the squeezing force, the limit baffle 397 rotates and makes room for the screw column. After the protruding part on the top of the screw column passes over the limit baffle 397 and moves above the limit baffle 397, the protruding part on the screw column can be clamped out by the limit baffle 397, so as to prevent the screw column from falling from the inside of the assembly and disassembly mechanism 39 after disassembly, and facilitate the subsequent installation of the screw column into the fixture again. In addition, through the cooperation of the limit baffle 397 and the screwdriver head 396, the screw column can be clamped between the limit baffle 397 and the screwdriver head 396, so that the removed screw column can be tightly fixed and is not easy to fall off due to the vibration of the device, and has better stability.

[0033] See also Figure 1-Figure 7The present invention provides a technical solution: the positioning device 4 includes a positioning base 41 and a wave plate 42, the top of the positioning base 41 is provided with a positioning groove 43, the inner wall side of the positioning groove 43 is fixedly connected with a telescopic push rod 44, one end of the telescopic push rod 44 away from the inner wall side of the positioning groove 43 is rotatably connected with a fixed part of a rotating seat 45, and a sliding card plate 46 is fixedly connected to the side of the rotating part of the rotating seat 45, one side of the wave plate 42 is fixedly connected with a limited slide bar 47, and a limited slide groove 48 is provided on the side of the limited slide bar 47 away from the wave plate 42, the bottom of the positioning base 41 is fixedly connected to the top of the workbench 1, the telescopic push rod 44 is provided with multiple groups and is evenly distributed on the inner wall of the positioning groove 43, the sliding card plate 46 is arranged in the limiting slide groove 48 and is slidably connected to the inner wall of the limiting slide groove 48, and both sides of the fixed part of the telescopic push rod 44 are fixedly connected with oblique support rods 49, and one end of the oblique support rod 49 away from the telescopic push rod 44 is fixedly connected to the inner wall of the positioning groove 43;

[0034] The positioning device 4 is provided. When in use, the clamp is placed in the positioning groove 43, and then the rotating seat 45 is driven to move by the telescopic push rod 44, the rotating seat 45 drives the sliding card plate 46 to move, the sliding card plate 46 drives the limiting slide bar 47 to move, and the limiting slide bar 47 drives the wave plate 42 to move. The clamp can be clamped and fixed in the positioning groove 43 by squeezing the wave plate 42 in multiple directions. In the process of clamping and fixing the clamp, the wave plate 42 can insert the protruding part on it into the recessed part of the side of the clamp, which is convenient for fixing the clamp more stably, and the protruding part on the side of the wave plate 42 is relatively smooth, which is not easy to cause damage to the clamp, and it is safe and reliable to use. Sliding card plates 46 and limiting slide grooves 48 are also provided. When the shape of the clamp changes, the telescopic push rods 44 at both ends of the wave plate 42 can be extended to different lengths, so that the wave plate 42 can be tilted in the positioning groove 43. The tilt angle can be freely adjusted according to the shape of the clamp, which is convenient for adapting to the use of clamps of different models and shapes, and has good adaptability.

[0035] 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 ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. An automatic screw assembly and disassembly machine for CNC fixtures, comprising a workbench (1), characterized in that: The top of the workbench (1) is fixedly connected to a fixed bracket (2), the top of the fixed bracket (2) is fixedly connected to a disassembly device (3), and the center position of the top of the workbench (1) is fixedly connected to a positioning device (4); The disassembly and assembly device (3) comprises a fixed seat (31), a hydraulic telescopic rod (32) passing through and fixedly connected to the fixed seat (31), a positioning seat (33) being fixedly connected to the bottom of the hydraulic telescopic rod (32), a rotation groove (34) being provided on the side of the positioning seat (33), a rotation support rod (35) being fixedly connected to the inner wall of the rotation groove (34) via a rotation bolt, a threaded push rod (36) passing through and threadedly connected to the top of the inner wall of the rotation groove (34), a pressing plate (37) being fixedly connected to the bottom of the threaded push rod (36), one end of the rotation support rod (35) extending to the outside of the rotation groove (34) and being fixedly connected to the telescopic rod (38), and one end of the telescopic rod (38) away from the rotation support rod (35) being fixedly connected to the assembly and disassembly mechanism (39); The fixed seat (31) is fixedly connected to the fixed bracket (2), and the rotating grooves (34) are provided in multiple groups and are evenly distributed on the positioning seat (33); A rotating handle is fixedly connected to the top of the threaded push rod (36), and a friction pad is provided at the bottom of the pressing plate (37); The assembly and disassembly mechanism (39) comprises a sleeve (391), the top of the sleeve (391) is fixedly connected to a driving motor (392), the driving shaft of the driving motor (392) passes through the sleeve (391) and extends into the sleeve (391), the end of the driving shaft of the driving motor (392) is fixedly connected to a square tube (393), the inner wall of the square tube (393) is slidably connected to a sliding rod (394), the top of the sliding rod (394) is fixedly connected to an extrusion spring (395), one end of the extrusion spring (395) away from the sliding rod (394) is fixedly connected to the top of the inner wall of the square tube (393), the bottom of the sliding rod (394) is fixedly connected to a screwdriver head (396), the side of the sleeve (391) passes through and is rotatably connected to a limit baffle (397), and the top and bottom of one end of the limit baffle (397) located outside the sleeve (391) are fixedly connected to an arc spring (398); One side of the sleeve (391) is fixedly connected to the end of the telescopic rod (38), and the shape of the sliding rod (394) is adapted to the shape of the inner wall of the square tube (393); An arc-shaped notch is formed at one end of the limit baffle (397) located inside the sleeve (391); and an end of the arc-shaped spring (398) away from the limit baffle (397) is fixedly connected to the side surface of the sleeve (391); The positioning device (4) comprises a positioning base (41) and a wave plate (42), wherein a positioning groove (43) is provided on the top of the positioning base (41), a telescopic push rod (44) is fixedly connected to the inner wall side of the positioning groove (43), one end of the telescopic push rod (44) away from the inner wall side of the positioning groove (43) is rotatably connected to the fixed part of the rotating seat (45), the side of the rotating part of the rotating seat (45) is fixedly connected to a sliding card plate (46), one side of the wave plate (42) is fixedly connected to a limiting slide bar (47), and a limiting slide groove (48) is provided on the side of the limiting slide bar (47) away from the wave plate (42).

2. The automatic screw assembly and disassembly machine for CNC fixtures according to claim 1, characterized in that: The bottom of the positioning base (41) is fixedly connected to the top of the workbench (1), and a plurality of groups of telescopic push rods (44) are arranged and evenly distributed on the inner wall of the positioning groove (43).

3. The automatic screw assembly and disassembly machine for CNC fixtures according to claim 1, characterized in that: The sliding card plate (46) is arranged inside the limiting slide groove (48) and is slidably connected to the inner wall of the limiting slide groove (48). Both sides of the fixed portion of the telescopic push rod (44) are fixedly connected to oblique support rods (49). One end of the oblique support rod (49) away from the telescopic push rod (44) is fixedly connected to the inner wall of the positioning groove (43).

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