A screw locking device for long arc-shaped workpieces

Abstract

The utility model provides a kind of screw locking equipment of long arc-shaped workpiece, including rack, workstation, installation base plate, clamping fixture, universal mechanical arm and screw locking head, workstation is fixed above rack, installation base plate is fixed in the upper front side of workstation, clamping fixture includes support base, limit boss and quick clamp, the lower end of support base is fixed on installation base plate, the upper front side of support base is provided with support curve, limit boss is fixed on the upper rear side of support base, quick clamp is fixed on support base and the clamping end corresponds to the front side of limit boss, the lower end of universal mechanical arm is fixed on workstation and corresponds to the rear side of installation base plate, screw locking head is fixed on the free end of universal mechanical arm, its advantage lies in: workpiece can be clamped quickly, workpiece is fixed firm and the hole position of screw to be locked is upward, it is convenient for manual operation screw locking head to lock screw to workpiece, improve the efficiency and effect of screw locking.

Description

Technical Field

[0001] This utility model relates to the field of screw fastening technology, and in particular to a screw fastening device for a long, arc-shaped workpiece. Background Technology

[0002] When screwing on workpieces with flat bottoms, the bottom surface of the workpiece is usually placed directly on the worktable, and then the screw is screwed on the top of the workpiece using a screw fastening bit. However, for long workpieces with curved bottoms, the curved bottom surface will wobble on the worktable, making it difficult to control the screw to be screwed vertically downwards when it is necessary to fasten the screw. Moreover, during the fastening process, the screw is also prone to tilting due to the shaking of the workpiece, resulting in poor screw fastening effect and low fastening efficiency. Even if some workpieces have flat sides that can be placed flat on the worktable, the holes of the screws to be fastened will still face the side rather than vertically upwards, which will cause inconvenience to the screw fastening operation and also have an adverse effect on the screw fastening efficiency. Therefore, it is necessary to manufacture a screw fastening device for long curved workpieces to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a screw fastening device for long, curved workpieces to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A screw fastening device for a long, curved workpiece includes a frame, a worktable, a mounting base plate, a clamping fixture, a universal robotic arm, and a screw fastening bit. The worktable is fixed above the frame, and the mounting base plate is fixed above the front side of the worktable. The clamping fixture includes a support base, a limiting boss, and a quick clamp. The lower end of the support base is fixed to the mounting base plate, and a support curved surface is provided on the upper front side of the support base. The limiting boss is fixed above the rear side of the support base. The quick clamp is fixed to the support base, and its clamping end corresponds to the front side of the limiting boss. The lower end of the universal robotic arm is fixed to the worktable and corresponds to the rear side of the mounting base plate. The screw fastening bit is fixed to the free-moving end of the universal robotic arm.

[0006] Further description of the present invention: A positioning hole is provided on the limiting boss, and the positioning hole penetrates the limiting boss in the front-to-back direction.

[0007] Further description of the present invention: A positioning post protruding forward is provided on the limiting boss, and the positioning post corresponds to the upper part of the supporting curved surface.

[0008] Further description of this utility model: It also includes a detection fixture, which includes an adjusting base, a mounting bracket, a cylinder, a movable bracket, and a metal sensor. The lower end of the adjusting base has a first strip-shaped hole in the horizontal direction. The adjusting base is fixed to the mounting base plate by screws passing through the first strip-shaped hole and its position is adjustable in the front-back direction. The upper end of the adjusting base has a second strip-shaped hole in the vertical direction. The mounting bracket is fixed to the upper end of the adjusting base by screws passing through the second strip-shaped hole and its position is adjustable in the vertical direction. The cylinder is fixed to the mounting bracket. The movable bracket is fixed to the power output end of the cylinder. The metal sensor is fixed to the movable bracket and corresponds to the upper rear side of the limiting boss.

[0009] Further description of this utility model: multiple sets of clamping fixtures and testing fixtures are arranged on the mounting base plate along the left and right directions.

[0010] Further description of this utility model: It also includes material picking boxes, two sets of which are fixed on the left and right sides in front of the workbench respectively.

[0011] Further description of this utility model: It also includes a protective baffle, which is vertically fixed on the worktable and corresponds to the lower front side of the universal robotic arm.

[0012] Further description of this utility model: The quick clamp adopts a vertical quick clamp.

[0013] The beneficial effects of this utility model are as follows: The curved surface of the lower end of the workpiece is placed on the supporting curved surface of the support base, and the workpiece is pushed backward to make it adhere to the front end face of the limiting boss. Then, a manual quick-clamping device is used to press the front side of the workpiece, fixing it on the limiting boss, thus completing the workpiece fixation. At this time, the holes for the screws to be fastened on the workpiece face upward. The screw fastening bit is moved manually; the universal robotic arm allows the screw fastening bit to move in all directions. The screw is inserted into the lower end of the screw fastening bit, and the lower end of the screw fastening bit attracts the screw through magnetic force, thus facilitating manual operation of the screw fastening bit to fasten the screws on the workpiece. The advantage of this design is that it can quickly clamp the workpiece, making it firmly fixed with the holes for the screws to be fastened facing upward, facilitating manual operation of the screw fastening bit to fasten the screws on the workpiece, and improving the efficiency and effectiveness of screw fastening. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of the present invention;

[0015] Figure 2 This is a structural diagram of the clamping fixture in this utility model;

[0016] Figure 3 This is a structural diagram of the testing fixture in this utility model;

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Frame; 2. Workbench; 3. Mounting base plate; 4. Clamping fixture; 41. Support base; 411. Support curved surface; 42. Limiting boss; 421. Positioning hole; 422. Positioning post; 43. Quick clamp; 5. Universal robotic arm; 6. Screwdriver bit attachment; 7. Inspection fixture; 71. Adjustable base; 711. First strip hole; 712. Second strip hole; 72. Mounting bracket; 73. Cylinder; 74. Movable frame; 75. Metal sensor; 8. Material handling box; 9. Protective baffle. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] like Figures 1 to 3 As shown, a screw fastening device for a long, arc-shaped workpiece includes a frame 1, a worktable 2, a mounting base plate 3, a clamping fixture 4, a universal robotic arm 5, and a screw fastening bit 6. The worktable 2 is fixed above the frame 1, and the mounting base plate 3 is fixed above the front side of the worktable 2. The clamping fixture 4 includes a support base 41, a limiting boss 42, and a quick clamp 43. The lower end of the support base 41 is fixed to the mounting base plate 3, and a support curved surface 411 is provided on the upper front side of the support base 41. The limiting boss 42 is fixed above the rear side of the support base 41. The quick clamp 43 is fixed to the support base 41, and its clamping end corresponds to the front side of the limiting boss 42. The lower end of the universal robotic arm 5 is fixed to the worktable 2 and corresponds to the rear side of the mounting base plate 3. The screw fastening bit 6 is fixed to the free-moving end of the universal robotic arm 5.

[0021] The curved surface of the lower end of the workpiece is placed on the supporting curved surface 411 of the supporting base 41, and the workpiece is pushed backward so that it is pressed against the front end face of the limiting boss 42. Then, the quick clamp 43 is manually operated to press the front side of the workpiece, fixing it on the limiting boss 42, thus completing the workpiece fixation. At this time, the holes of the screws to be fastened on the workpiece face upward. The screw fastening bit 6 is manually moved. The universal robotic arm 5 allows the screw fastening bit 6 to move in all directions. The screw is inserted into the lower end of the screw fastening bit 6. The lower end of the screw fastening bit 6 is magnetically attracted to the screw, making it easy for the screw fastening bit 6 to fasten the screws on the workpiece manually. The advantage of this design is that it can quickly clamp the workpiece, making the workpiece firmly fixed with the holes of the screws to be fastened facing upward, making it easy for the screw fastening bit 6 to fasten the screws on the workpiece manually, thus improving the efficiency and effect of screw fastening.

[0022] The limiting boss 42 is provided with a positioning hole 421, which extends through the limiting boss 42 in the front-to-back direction. The protruding part of the workpiece is inserted into the positioning hole 421, thereby enabling the workpiece to be quickly positioned.

[0023] The limiting boss 42 is provided with a positioning post 422 protruding forward, which corresponds to the upper part of the supporting curved surface 411. The positioning post 422 is inserted into the hole on the side of the workpiece, thereby enabling rapid positioning of the workpiece.

[0024] This design also includes a detection fixture 7, which includes an adjusting base 71, a mounting bracket 72, a cylinder 73, a movable bracket 74, and a metal sensor 75. The lower end of the adjusting base 71 has a first strip-shaped hole 711 in the horizontal direction. The adjusting base 71 is fixed to the mounting base plate 3 by screws passing through the first strip-shaped hole 711 and its position is adjustable in the front-back direction. The upper end of the adjusting base 71 has a second strip-shaped hole 712 in the vertical direction. The mounting bracket 72 is fixed to the upper end of the adjusting base 71 by screws passing through the second strip-shaped hole 712 and its position is adjustable in the vertical direction. The cylinder 73 is fixed to the mounting bracket 72. The movable bracket 74 is fixed to the power output end of the cylinder 73. The metal sensor 75 is fixed to the movable bracket 74 and corresponds to the upper rear side of the limiting boss 42.

[0025] In some workpieces, there are embedded hardware parts at the positions where screws are to be tightened. After the workpiece is clamped, the movable frame 74 and the metal sensor 75 are driven forward to approach the workpiece by the cylinder 73 to detect the hardware parts inside the workpiece and determine whether the hardware parts are present. Only after confirming that the hardware parts are complete can the screws be tightened. The mounting frame 72 can be adjusted in front-back position and vertical position through the first strip hole 711 and the second strip hole 712 to adapt to workpieces of different sizes.

[0026] Multiple sets of clamping fixtures 4 and testing fixtures 7 are arranged on the mounting base plate 3 along the left and right directions. This allows long, strip-shaped workpieces to be fixed more firmly.

[0027] This design also includes a material picking box 8, with two sets of the material picking box 8 fixed to the left and right sides of the front of the workbench 2 respectively. Screws are placed inside the material picking box 8 to facilitate the operator placing the screws into the screwdriver bits 6.

[0028] This design also includes a protective baffle 9, which is vertically fixed on the worktable 2 and corresponds to the lower front side of the omnidirectional robotic arm 5. The protective baffle 9 limits the maximum forward movement of the lower end of the omnidirectional robotic arm 5, preventing the lower end of the omnidirectional robotic arm 5 from colliding with the inspection fixture 7 or the clamping fixture 4.

[0029] The quick clamp 43 is a vertical quick clamp 43. In the clamping state, the handle and pressure arm are vertical. Pressing down the handle releases the workpiece, while lifting the handle clamps the workpiece. It is suitable for lateral positioning clamping, hole positioning clamping, vertical positioning clamping, etc.

[0030] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A screw fastening device for a long, arc-shaped workpiece, characterized in that: The system includes a frame, a worktable, a mounting base plate, a clamping fixture, a universal robotic arm, and screwdriver bits. The worktable is fixed above the frame, and the mounting base plate is fixed above the front side of the worktable. The clamping fixture includes a support base, a limiting boss, and a quick clamp. The lower end of the support base is fixed to the mounting base plate, and a support curved surface is provided on the upper front side of the support base. The limiting boss is fixed above the rear side of the support base, and the quick clamp is fixed to the support base with its clamping end corresponding to the front side of the limiting boss. The lower end of the universal robotic arm is fixed to the worktable and corresponds to the rear side of the mounting base plate. The screwdriver bits are fixed to the free-moving end of the universal robotic arm.

2. The screw fastening device for a long, arc-shaped workpiece according to claim 1, characterized in that: The limiting boss is provided with a positioning hole, which penetrates the limiting boss in the front-to-back direction.

3. The screw fastening device for a long, arc-shaped workpiece according to claim 1, characterized in that: The limiting boss is provided with a positioning post protruding forward, and the positioning post corresponds to the upper part of the supporting curved surface.

4. The screw fastening device for a long, arc-shaped workpiece according to claim 1, characterized in that: It also includes a detection fixture, which comprises an adjusting base, a mounting bracket, a cylinder, a movable bracket, and a metal sensor. The lower end of the adjusting base has a first strip-shaped hole in the horizontal direction. The adjusting base is fixed to the mounting base plate by screws passing through the first strip-shaped hole and is adjustable in the front-back direction. The upper end of the adjusting base has a second strip-shaped hole in the vertical direction. The mounting bracket is fixed to the upper end of the adjusting base by screws passing through the second strip-shaped hole and is adjustable in the vertical direction. The cylinder is fixed to the mounting bracket. The movable bracket is fixed to the power output end of the cylinder. The metal sensor is fixed to the movable bracket and corresponds to the upper rear side of the limiting boss.

5. The screw fastening device for a long, arc-shaped workpiece according to claim 4, characterized in that: Multiple sets of the clamping fixture and the testing fixture are arranged on the mounting base plate in the left-right direction.

6. The screw fastening device for a long, arc-shaped workpiece according to claim 1, characterized in that: It also includes material picking boxes, of which two sets are provided and fixed on the left and right sides in front of the workbench respectively.

7. The screw fastening device for a long, arc-shaped workpiece according to claim 1, characterized in that: It also includes a protective baffle, which is vertically fixed on the worktable and corresponds to the lower front side of the omnidirectional robotic arm.

8. The screw fastening device for a long, arc-shaped workpiece according to claim 1, characterized in that: The quick clamp is a vertical quick clamp.

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