Pliers polishing positioning device and method

Abstract

This invention discloses a pliers grinding and positioning device and method, including a frame, a linear motion mechanism, a clamping mechanism, and a sensor. The linear motion mechanism includes a sliding base plate and a linear drive assembly. The clamping mechanism includes a jaw clamping assembly, a front and rear clamping assembly, a left and right clamping assembly, and a pressing assembly. The jaw clamping assembly includes a fixed clamping block and an elastic movable clamping block, forming a clamping opening between the fixed clamping block and the elastic movable clamping block. The front and rear clamping assembly includes a front clamping block, a rear clamping block, and front and rear clamping drive members. The left and right clamping assembly includes a left clamping block, a right clamping block, and left and right clamping drive members. The pressing assembly includes a sliding frame, a sliding frame drive member, a pressing cylinder, and an elastic pressing block located above the clamping opening. The sensor is located on the front and rear sides of the sliding base plate to detect the position of the pliers positioned on the clamping opening. This invention uses a photoelectric sensor to detect the position of the pliers head seam, and then performs position compensation to avoid size discrepancies.

Description

Technical Field

[0001] This invention relates to the field of pliers polishing, and more particularly to a pliers polishing positioning device and method. Background Technology

[0002] Fitter tools are essential tools in the fields of mechanical manufacturing, repair, and assembly. Their surface precision directly affects the operating feel, clamping stability, and service life. With the upgrading of industrial automation, the demand for high-precision fitter tools continues to grow.

[0003] Current pliers grinding and positioning techniques rely on external dimensions. While this allows for partial batch production, aging of the forging dies and other factors can lead to size discrepancies between the left and right sides of the pliers before grinding. In such cases, continuing the grinding process using external positioning exacerbates these dimensional differences, particularly noticeable when grinding needle-nose pliers. Figure 6 As shown in the image. In this case, manual repair is required, which consumes a lot of manpower and time, and in severe cases, the item may be scrapped, resulting in economic losses. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a pliers grinding and positioning device and method. The device uses a photoelectric sensor to detect the position of the center seam of the pliers head and then performs position compensation to avoid problems caused by size differences.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A pliers grinding and positioning device, characterized in that it includes a frame, a linear motion mechanism, a clamping mechanism, and a sensor;

[0007] The linear motion mechanism includes a sliding base plate and a linear drive assembly that drives the sliding base plate to move.

[0008] The clamping mechanism includes a jaw clamping assembly, a front and rear clamping assembly, a left and right clamping assembly, and a pressing assembly;

[0009] The jaw clamping assembly includes a fixed clamping block and an elastic movable clamping block disposed on a sliding base plate, forming a clamping opening between the fixed clamping block and the elastic movable clamping block;

[0010] The front and rear clamping assembly includes a front clamping block, a rear clamping block located on the front and rear sides of the clamping port, and a front and rear clamping drive component that drives the front and rear clamping blocks to clamp or loosen.

[0011] The left and right clamping components include a left clamping block, a right clamping block located on the left and right sides of the clamping port, and a left and right clamping drive component that drives the left and right clamping blocks to clamp or release.

[0012] The clamping assembly includes a sliding frame mounted on the frame, a sliding frame drive component that drives the sliding frame to slide on the frame, a clamping cylinder mounted on the sliding frame, and an elastic pressure block mounted on the clamping cylinder and located above the clamping port.

[0013] The sensors are located on the front and rear sides of the sliding base plate to detect the position of the pliers positioned on the clamping jaws.

[0014] Preferably, a sliding push rod is connected to the back of the elastic movable clamping block, and a first spring is sleeved on the sliding push rod. One end of the first spring abuts against the sliding base plate, and the other end abuts against the movable push rod, pushing the elastic movable clamping block toward the fixed clamping block.

[0015] Preferably, the opposing surfaces of the fixed clamping block and the elastic movable clamping block are both arc surfaces.

[0016] Preferably, the front and rear clamping drive components are double-jaw chucks, and the front clamping block and the rear clamping block are respectively disposed on the two jaws of the double-jaw chuck.

[0017] Preferably, a sliding groove extending to the left and right is provided on the top surface of the double-claw chuck, and the sliding base plate is fitted into the sliding groove.

[0018] Preferably, the left and right clamping drive is a clamping cylinder, and the linear drive assembly includes a crank-slider structure and a servo motor that drives the crank-slider structure.

[0019] Preferably, the elastic pressure block includes a positioning plate, a positioning seat, a pressure plate, and a second spring;

[0020] The positioning plate is mounted on the piston rod of the clamping cylinder;

[0021] The positioning seat is mounted on the positioning plate, and the middle position of the pressure plate is rotatably connected to the positioning seat;

[0022] The second spring has two springs, located on the left and right sides of the pressure plate respectively, and between the pressure plate and the positioning seat.

[0023] A method for grinding and positioning pliers, characterized by the following specific steps:

[0024] S1. Use the clamping mechanism to fix the pliers in place;

[0025] S2. Use a linear motion mechanism to drive the pliers, which are in a fixed state, to reciprocate.

[0026] S3. Use sensors to detect the position of the pliers in motion and calculate the position data of the pliers when the sensor light flux is at its maximum.

[0027] S4. The position data is sent to the linear motion mechanism, which then drives the clamps to the designated position.

[0028] S5. The clamping component is lifted, the robot grabs the handle of the pliers, and the left and right clamping components release their grip on the pliers.

[0029] S6. The robot uses hand-held pliers to polish the surface.

[0030] The advantages of this invention are as follows: After the pliers are fixed by the clamping mechanism, the position of the clamping gap at the pliers head is detected by the linear motion mechanism and the sensor, and then position compensation is performed. The clamping gap at the pliers head is used as the positioning reference for the grinding robot to clamp and grind, avoiding defects caused by size differences, and improving product quality and yield. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the pliers grinding and positioning device provided in this embodiment;

[0032] Figure 2 This is another schematic diagram of the pliers grinding and positioning device provided in this embodiment;

[0033] Figure 3 This is a schematic diagram of the elastic pressure block provided in this embodiment;

[0034] Figure 4 This is a schematic diagram of the clamps provided in this embodiment during positioning detection;

[0035] Figure 5 A schematic diagram illustrating the ideal polishing effect for the pliers head;

[0036] Figure 6 The effect of polishing on defective products caused by poor quality of the raw blank. Detailed Implementation

[0037] Combination Figures 1 to 6 The present invention provides a further description of the pliers grinding and positioning device and method.

[0038] A pliers grinding and positioning device, characterized in that it includes a frame 1, a linear motion mechanism 2, a clamping mechanism, and a sensor.

[0039] The linear motion mechanism 2 includes a sliding base plate 21 and a linear drive assembly that drives the sliding base plate 21 to reciprocate. The clamping mechanism includes a jaw clamping assembly 6, a front and rear clamping assembly 3, a left and right clamping assembly 4, and a pressing assembly 5.

[0040] The jaw clamping assembly 6 includes a fixed clamping block 61 and an elastically movable clamping block 62 disposed on the sliding base plate 21, with a clamping opening 63 formed between the fixed clamping block 61 and the elastically movable clamping block 62 for the head of the pliers 8 to be inserted. The front and rear clamping assembly 3 includes a front clamping block 31 and a rear clamping block 32 located on the front and rear sides of the clamping opening 63, and a front and rear clamping drive member 33 that drives the front clamping block 31 and the rear clamping block 32 to clamp or release. The left and right clamping assembly 4 includes a left clamping block 41 and a right clamping block 42 located on the left and right sides of the clamping opening 63, and a left and right clamping drive member 44 that drives the left clamping block 41 and the right clamping block 42 to clamp or release. The clamping assembly 5 includes a sliding frame 52 mounted on the frame 1, a sliding frame drive 51 that drives the sliding frame 52 to slide on the frame 1, a clamping cylinder 54 mounted vertically on the sliding frame 52, and an elastic pressure block 53 mounted on the clamping cylinder 54 and located above the clamping port 63.

[0041] The sensor is a through-beam sensor, electrically connected to the controller of the grinding positioning device, and located on the front and rear sides of the sliding base plate 21 to detect the position of the clamp head gap 84 positioned on the clamping port 63.

[0042] Specifically, the fixed clamping block 61 is fixed to the sliding base plate 21 by bolts. The elastic movable clamping block 62 is mounted on the sliding base plate 21 by a slider and a slide rail, allowing the elastic movable clamping block 62 to move in the left and right directions. A sliding push rod 71 is connected to the back of the elastic movable clamping block 62. A first spring 72 is sleeved on the sliding push rod 71. The right end of the first spring 72 abuts against the plate 211 on the sliding base plate 21, and the left end abuts against the positioning nut at the left end of the sliding push rod 71, pushing the elastic movable clamping block 62 toward the fixed clamping block 61, so that the clamping opening 63 has elastic properties.

[0043] To prevent the sliding push rod 71 from detaching from the plate 211, a limiting nut is connected to the right end of the sliding push rod 71, and the limiting nut is located on the outer side of the positioning plate 531.

[0044] The faces of the fixed clamping block 61 and the elastic movable clamping block 62 are both arc surfaces to facilitate the insertion of the head of the pliers 8.

[0045] The front and rear clamping drive component 33 is a double-jaw chuck, which is installed on the front side of the frame 1. The front clamping block 31 and the rear clamping block 32 are respectively installed on the two jaws 331 of the double-jaw chuck. The double-jaw chuck drives the front clamping block 31 and the rear clamping block 32 to clamp the pliers 8 inserted in the clamping port 63. The double-jaw chuck is prior art, so its specific structure will not be described in detail in this embodiment.

[0046] A sliding groove extending to the left and right is provided on the top surface of the double-claw chuck, and the sliding base plate 21 is fitted in the sliding groove.

[0047] The sliding frame drive component 51 is a rodless cylinder. The slider of the rodless cylinder is connected to the sliding frame, which drives the sliding frame to move.

[0048] The left and right clamping drive component 44 is a clamping cylinder, which is mounted on the frame 1 via a mounting bracket and located in front of the double-jaw chuck. The left clamping block 41 and the right clamping block 42 are respectively mounted on the left and right clamping fingers 441 of the clamping cylinder, and the clamping fingers drive the left clamping block 41 and the right clamping block 42 to clamp on the left and right sides of the pliers 8.

[0049] Both the left clamping block 41 and the right clamping block 42 have vertically extending adjustment grooves. The left clamping block 41 and the right clamping block 42 are engaged with the two clamping finger ends of the clamping cylinder through the adjustment grooves, so that the left clamping block 41 and the right clamping block 42 can slide up and down to adjust their positions, so that the left clamping block 41 and the right clamping block 42 can be clamped in the appropriate positions on the left and right sides of the pliers 8.

[0050] Both the left clamping block 41 and the right clamping block 42 have waist-shaped connecting holes that extend vertically, and the clamping fingers have through holes. The waist-shaped connecting holes align with the through holes, and the left clamping block 41 and the right clamping block 42 can be locked by screwing in the bolts.

[0051] The left clamping block 41 and the right clamping block 42 have opposing surfaces with pressure blocks 43 that abut against the pliers 8 when clamping them. The end of the pressure block 43 facing the pliers 8 is an arc surface. The left clamping block 41 and the right clamping block 42 clamp the pliers 8 through the pressure blocks 43, and the pressure blocks 43 press against the position 82 of the pliers 8 near the middle hinge, so that when the pliers 8 is clamped from both sides, the handle 81 and the head of the pliers 8 can swing left and right under the drive of the linear motion mechanism 2.

[0052] The linear drive assembly includes a crank-slider structure 22 and a servo motor 23 that drives the crank-slider structure 22. The crank-slider structure 22 includes a connecting rod 221, a bearing 222, and an eccentric cam 223. The eccentric cam is mounted on the shaft of the servo motor 23, and the bearing is mounted on the eccentric cam and installed in the mounting hole at the tail of the connecting rod 221. The head of the connecting rod 221 is connected to the sliding base plate 21 through a pin. Therefore, when the servo motor 23 rotates, it can drive the sliding base plate 21 to reciprocate through the eccentric cam and the connecting rod.

[0053] The elastic pressure block 53 includes a positioning plate 531, a positioning seat 532, a pressure plate 533, and a second spring 534.

[0054] The positioning plate 531 is mounted on the piston rod of the clamping cylinder 54; the positioning seat 532 is mounted on the lower surface of the positioning plate 531; the middle position of the pressure plate 533 is rotatably connected to the positioning seat 532 by a pin; there are two second springs 534, located on the left and right sides of the pressure plate 533 respectively, and between the pressure plate 533 and the positioning seat 532, which elastically clamp the two handles 81 of the pliers 8, and at the same time, when the elastic pressure block 53 presses down on the handles 81, the handles 81 can swing left and right.

[0055] A method for grinding and positioning pliers, characterized by the following specific steps:

[0056] S1. Secure the pliers 8 using a clamping mechanism. Specifically, insert the head of the pliers 8 downwards into the clamping port 63; the left and right clamping drive members 44 drive the left clamping block 41 and the right clamping block 42 to move towards each other, so that the pressure block 43 presses against the left and right sides of the pliers 8 and is close to the hinge position 82 of the pliers 8; the front and rear clamping drive members 33 drive the front clamping block 31 and the rear clamping block 32 to clamp the front and rear sides of the pliers head 83, flatten and calibrate the two pliers head 83, and then release them; the sliding frame drive member 51 drives the sliding frame 52 to move so that the elastic pressure block 53 moves to directly above the pliers 8, and the clamping cylinder 54 drives the elastic pressure block 53 to move down and press it onto the two pliers handles 81 of the pliers 8;

[0057] S2. The linear motion mechanism 2 drives the pliers 8, which is in a fixed state, to reciprocate. Specifically, the linear drive assembly drives the sliding base plate 21 to move back and forth, and the sliding base plate 21 drives the pliers 8 to move synchronously, so that the pliers 8 handle 81 and pliers head swing left and right with the clamping positions of the left clamping block 41 and the right clamping block 42 as the reference.

[0058] S3. The position of the pliers 8 during operation is detected using a sensor. During the detection process, as the pliers head swings left and right, the sensor beam switches between the left pliers head, the gap 84, the right pliers head, and the gap 84. The controller of the grinding positioning device calculates the position data of the pliers 8 when the sensor light flux is at its maximum.

[0059] S4. Send the position data to the linear motion mechanism 2. The linear motion mechanism 2 drives the clamp 8 to swing to the designated position, that is, the position when the light flux is maximum.

[0060] S5, the front and rear clamping components 3 clamp the pliers 8 again, the pressing component 5 is lifted, the robot grabs the handle of the pliers 8, and the front and rear clamping components 3 and the left and right clamping components 4 release their grip on the pliers 8.

[0061] S6. The robot uses hand-held pliers 8 to polish the surface.

[0062] In practical use, after the clamping mechanism fixes the clamp 8, the linear motion mechanism 2 works with the sensor to detect the position of the clamping gap 84 at the head of the clamp 8, and then performs position compensation. The clamping gap 84 at the head of the clamp 8 is used as the positioning reference for the grinding robot to clamp and grind, avoiding defects caused by size differences and improving product quality and pass rate.

[0063] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A pliers grinding and positioning device, characterized in that, Includes frame, linear motion mechanism, clamping mechanism and sensor; The linear motion mechanism includes a sliding base plate and a linear drive assembly that drives the sliding base plate to move. The clamping mechanism includes a jaw clamping assembly, a front and rear clamping assembly, a left and right clamping assembly, and a pressing assembly; The jaw clamping assembly includes a fixed clamping block and an elastic movable clamping block disposed on a sliding base plate, forming a clamping opening between the fixed clamping block and the elastic movable clamping block; The front and rear clamping assembly includes a front clamping block, a rear clamping block located on the front and rear sides of the clamping port, and a front and rear clamping drive component that drives the front and rear clamping blocks to clamp or loosen. The left and right clamping components include a left clamping block, a right clamping block located on the left and right sides of the clamping port, and a left and right clamping drive component that drives the left and right clamping blocks to clamp or release. The clamping assembly includes a sliding frame mounted on the frame, a sliding frame drive component that drives the sliding frame to slide on the frame, a clamping cylinder mounted on the sliding frame, and an elastic pressure block mounted on the clamping cylinder and located above the clamping port. The sensors are located on the front and rear sides of the sliding base plate to detect the position of the pliers positioned on the clamping jaws.

2. The pliers grinding and positioning device according to claim 1, characterized in that: A sliding push rod is connected to the back of the elastic movable clamping block. A first spring is sleeved on the sliding push rod. One end of the first spring abuts against the sliding base plate, and the other end abuts against the movable push rod, pushing the elastic movable clamping block toward the fixed clamping block.

3. The pliers grinding and positioning device according to claim 2, characterized in that: The opposing surfaces of the fixed clamping block and the elastic movable clamping block are both arc surfaces.

4. The pliers grinding and positioning device according to claim 1, characterized in that: The front and rear clamping drive components are double-jaw chucks, and the front clamping block and the rear clamping block are respectively disposed on the two jaws of the double-jaw chuck.

5. The pliers grinding and positioning device according to claim 4, characterized in that: A sliding groove extending to the left and right is provided on the top surface of the double-claw chuck, and the sliding base plate is fitted into the sliding groove.

6. The pliers grinding and positioning device according to claim 1, characterized in that: The left and right clamping drive is a clamping cylinder, and the linear drive assembly includes a crank-slider structure and a servo motor that drives the crank-slider structure.

7. The pliers grinding and positioning device according to claim 1, characterized in that: The elastic block includes a positioning plate, a positioning seat, a pressure plate, and a second spring; The positioning plate is mounted on the piston rod of the clamping cylinder; The positioning seat is mounted on the positioning plate, and the middle position of the pressure plate is rotatably connected to the positioning seat; The second spring has two springs, located on the left and right sides of the pressure plate respectively, and between the pressure plate and the positioning seat.

8. A method for grinding and positioning pliers, characterized in that: The pliers grinding and positioning device according to any one of claims 1 to 7 includes the following specific steps: S1. Secure the pliers using the clamping mechanism; S2. Use a linear motion mechanism to drive the pliers, which are in a fixed state, to reciprocate. S3. Use sensors to detect the position of the pliers in motion and calculate the position data of the pliers when the sensor light flux is at its maximum. S4. The position data is sent to the linear motion mechanism, which then drives the clamps to the designated position. S5. The clamping component is lifted, the robot grabs the handle of the pliers, and the left and right clamping components release their grip on the pliers. S6. The robot uses hand-held pliers to polish the surface.

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