Special-shaped curved surface drilling positioning device

Abstract

The utility model discloses a special-shaped curved surface drilling positioning device, and relates to the technical field of drilling. According to the technical scheme, the special-shaped curved surface drilling machining positioning device comprises a bearing plate, a transmission mechanism is installed on the bearing plate, a workbench is installed on the bearing plate, a pushing and pressing mechanism is installed on the workbench, and a positioning mechanism is installed on the workbench; the positioning mechanism comprises a fixed block and a transmission block, a sliding seat is mounted below the fixed block, a connecting rod is rotatably mounted below the sliding seat, the transmission block is rotatably mounted above the bearing plate, the sliding seat is slidably connected with the bearing plate, an abutting block is slidably mounted above the fixed block, a trapezoidal block is mounted above the abutting block, and a sliding block is slidably mounted at the inclined surface of the trapezoidal block; a hold-down head is rotationally installed at the top end of the sliding block. The utility model aims to provide the special-shaped curved surface drilling positioning device, so that the effects of self-adaptive stable clamping of a curved surface workpiece subjected to drilling and positioning during machining are achieved.

Description

TECHNICAL FIELD

[0001] The utility model discloses a kind of special-shaped curved surface drilling processing positioning devices, it is related to drilling processing technical field. BACKGROUND

[0002] Drilling clamping is an important process step in machining, involving how to stably fix the workpiece on the fixture to ensure the accuracy and safety during drilling. The stability of the drilling process not only depends on the quality of the drill bit and the processing parameters, but also is closely related to the design and use of the clamping system. Correct drilling clamping method can effectively avoid displacement or vibration of the workpiece during machining, ensuring the accuracy of hole diameter and surface quality. The primary task of drilling clamping is to stably fix the workpiece so that it does not displace, rotate or deform during drilling. Drilling of curved surface workpieces is a relatively complex machining task, because the shape of curved surface workpieces is irregular and cannot be simply fixed and positioned like flat workpieces. Therefore, special clamping and positioning methods need to be adopted during drilling to ensure drilling accuracy.

[0003] The shape of curved surface workpieces is complex, and traditional clamping methods cannot ensure the stability of the workpiece. Especially for spherical, free curved surface or workpieces with complex geometric shapes, the use of traditional fixtures may cause inaccurate positioning or unstable clamping, and the drilling position may be affected by the curved surface, resulting in small distance deviation of the part, which may affect the accuracy and surface quality of drilling. Therefore, a special-shaped curved surface drilling processing positioning device is needed to solve the above problems. SUMMARY

[0004] The utility model aims at providing a kind of special-shaped curved surface drilling processing positioning device, reach the effect of self-adaptive stable clamping to the curved surface workpiece of drilling processing and positioning in processing.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a kind of special-shaped curved surface drilling processing positioning device, including receiving plate, it is characterized by: transmission mechanism is installed on receiving plate, workbench is installed on receiving plate, push mechanism is installed on workbench, positioning mechanism is installed on workbench;Positioning mechanism includes fixed block and transmission block, sliding seat is installed below fixed block, connecting rod is rotatably installed below sliding seat, transmission block is rotatably installed on the transmission block above receiving plate, and connecting rod is rotatably connected, sliding seat is slidably connected with receiving plate, abutting block is slidably installed above fixed block, trapezoidal block is installed above abutting block, sliding block is slidably installed at the inclined surface of trapezoidal block, and pressure head is rotatably installed at the top end of sliding block.

[0006] Preferably, the positioning mechanism is symmetrically installed with two groups with the workbench center shaft as the center line.

[0007] Preferably, a pull rod is provided in the transmission mechanism, and the pull rod is fixedly connected with the push mechanism.

[0008] Preferably, the driving mode of the transmission block is motor driving, and the position of the transmission block is on the same axis as the center position of the workbench.

[0009] Preferably, vertical limit blocks are slidably installed on the two sides of the sliding block, and the vertical limit blocks are fixedly connected with the workbench.

[0010] Preferably, a downward protruding trapezoidal block is arranged at the front end of the abutting block for abutting the side surface of the special-shaped curved workpiece to control the overall movement of the abutting block.

[0011] Preferably, an inclined slide rail is arranged on the inclined surface of the trapezoidal block arranged at the upper end of the abutting block.

[0012] Preferably, a plurality of curved pressing heads are rotatably installed on the pressing head.

[0013] Preferably, a spring is arranged at the sliding connection between the abutting block and the fixed block.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the transmission mechanism drives the pushing mechanism to move towards the center of the workbench, abuts against the special-shaped curved workpiece and continuously pushes it, so that the special-shaped curved workpiece abuts against the positioning mechanism; the motor drives the transmission block to rotate, thereby driving the connecting rods installed on the two sides of the transmission block to move; the connecting rods pull the sliding seat to move inward, and the sliding seat drives the fixed block to move, so that the abutting block installed thereon moves towards the side edge of the special-shaped curved workpiece until the top end of the abutting block abuts against the side surface of the special-shaped curved workpiece; the fixed block continuously drives the abutting block to move inward, and the abutting block slides backward along the fixed block according to the shape of the special-shaped curved workpiece; the sliding block only moves downward in a straight line under the limitation of the vertical limit block, so that the sliding block slidably installed on the abutting block moves downward along the inclined surface of the trapezoidal block on the abutting block; the pressing head abuts against the upper surface of the special-shaped curved workpiece, the pressing head provided with a plurality of crescent-shaped curved pressing heads adjusts and presses the surface of the workpiece in a self-adapting manner, so as to realize the pressing effect; the two positioning mechanisms are driven by the transmission block, so that the movement distances of the fixed blocks in the two positioning mechanisms are equal, and the fixed blocks move towards the same center; when the pushing mechanism pushes the special-shaped curved workpiece towards the positioning mechanism, the two positioning mechanisms move together, so as to realize the centering and positioning effect; the self-adapting adjustment of the device can realize the working on special-shaped curved workpieces of different types, and the practical range is wide. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole schematic view of a special-shaped curved surface drilling positioning device.

[0016] Figure 2 It is a pushing mechanism schematic view of a special-shaped curved surface drilling positioning device. Figure 1

[0017] ​Figure 3 for Figure 1 A schematic diagram of the positioning mechanism of a positioning device for drilling and positioning irregular curved surfaces;

[0018] The following are the labeling elements in the figure:

[0019] 1. Receiving plate; 2. Transmission mechanism; 21. Tie rod; 3. Worktable; 4. Pushing mechanism; 5. Positioning mechanism; 51. Transmission block; 52. Connecting rod; 53. Slide seat; 54. Fixing block; 55. Abutting block; 551. Inclined slide rail; 56. Vertical limiting block; 57. Sliding block; 58. Pressing head; 581. Curved surface pressing head. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Specific implementation examples:

[0022] like Figure 1 As shown, a positioning device for drilling and machining irregular curved surfaces includes a receiving plate 1, a transmission mechanism 2 installed on the receiving plate 1, a worktable 3 installed on the receiving plate 1, a pushing mechanism 4 installed on the worktable 3, and a positioning mechanism 5 installed on the worktable 3. The positioning mechanism 5 is symmetrically installed in two sets with the central axis of the worktable 3 as the center line.

[0023] The transmission mechanism 2 is cylinder driven, and the transmission mechanism 2 drives the pushing mechanism 4 to perform linear motion.

[0024] During overall operation, the irregular curved workpiece is placed above the worktable 3, between the pushing mechanism 4 and the positioning mechanism 5. The transmission mechanism 2 drives the pushing mechanism 4 to move closer to the center of the worktable 3, contacting the irregular curved workpiece and continuing to push it until it contacts the positioning mechanism 5. The positioning mechanism 5 then positions and holds the irregular curved workpiece.

[0025] like Figure 2 As shown, the transmission mechanism 2 is provided with a pull rod 21, which is fixedly connected to the pushing mechanism 4;

[0026] The function of the transmission mechanism 2 is to connect the pull rod 21 with the pushing mechanism 4, and the cylinder drives the pull rod 21 to pull the pushing mechanism 4 toward the center of the worktable 3, pushing the irregular curved workpiece toward the positioning mechanism 5.

[0027] The positioning mechanism 5 comprises a fixed block 54 and a transmission block 51, the fixed block 54 is provided below with a sliding seat 53, the sliding seat 53 is provided below with a connecting rod 52, the transmission block 51 is rotatably installed above the receiving plate 1, the transmission block 51 is driven by a motor, the position of the transmission block 51 is on the same axis as the center position of the workbench 3, the transmission block 51 is rotatably connected with the connecting rod 52, the sliding seat 53 is slidably connected with the receiving plate 1, the fixed block 54 is slidably provided above with a resisting block 55, the resisting block 55 is provided above with a trapezoidal block (not marked in the figure), the trapezoidal block is slidably provided with a sliding block 57 at the inclined surface, the sliding block 57 is rotatably provided at the top end with a pressing head 58, the sliding block 57 is slidably provided with a vertical limiting block 56 at both sides, and the vertical limiting block 56 is fixedly connected with the workbench 3;

[0028] After the push mechanism 4 pushes the special-shaped curved workpiece to the positioning mechanism 5, the motor drives the transmission block 51 to rotate, thereby driving the connecting rod 52 installed at both sides of the transmission block 51 to move, because one end of the connecting rod 52 is rotatably connected with the transmission block 51 and the other end is rotatably connected with the sliding seat 53, when the transmission block 51 rotates, the one end of the connecting rod 52 connected with the transmission block 51 rotates, the connecting rod 52 inclines, because the sliding seat 53 is slidably connected with the receiving plate 1, the connecting rod 52 pulls the sliding seat 53 to move inward, the sliding seat 53 drives the fixed block 54 to move, thereby making the resisting block 55 installed on the fixed block 54 move to close the side of the special-shaped curved workpiece, until the top end of the resisting block 55 abuts against the side surface of the special-shaped curved workpiece, with the continuous rotation of the transmission block 51, the fixed block 54 continuously drives the resisting block 55 to move inward, the resisting block 55 slides backward along the fixed block 54 according to the shape of the special-shaped curved workpiece, the sliding block 57 only does linear downward movement under the limiting of the vertical limiting block 56, making the sliding block 57 slidably installed on the resisting block 55 move downward along the inclined surface of the trapezoidal block on the resisting block 55, until the pressing head 58 abuts against the upper surface of the special-shaped curved workpiece, and the pressing head 58 can adaptively adjust the pressing position according to the change of the surface shape of the special-shaped curved workpiece, the two sets of positioning mechanisms 5 are driven by the transmission block 51, making the movement distance of the fixed block 54 in the two sets of positioning mechanisms 5 equal, and moving to the same center, when the push mechanism 4 pushes the special-shaped curved workpiece to the positioning mechanism 5, the common movement can play a role in centering and positioning, the resisting block 55 and the pressing head 58 installed thereon can both adaptively adjust according to the surface of the special-shaped curved workpiece abutting against, thereby clamping special-shaped curved workpieces of various types, and the application range is wide, at the same time, after the resisting block 55 and the pressing head 58 press the special-shaped curved workpiece, the two sets of control blocks stop moving, and the centering and clamping are completed;

[0029] The front end of the resisting block 55 is a downward protruding trapezoidal block, the top surface of the trapezoidal block is used for abutting against the side surface of the special-shaped curved workpiece to control the overall movement of the resisting block 55;

[0030] The trapezoidal block inclined surface on the upper end of the abutting block 55 is provided with an inclined slide rail 551 for limiting the movement direction of the trapezoidal block on the abutting block 55;

[0031] A plurality of groups of curved pressing heads 581 are rotatably installed on the pressing head 58, and the curved pressing heads 581 are in the shape of a crescent moon;

[0032] The curved pressing heads 581 can be self-adaptively adjusted according to the irregular shape of the surface of the special-shaped curved workpiece when the pressing head 58 presses the special-shaped curved workpiece, further improving the pressing force, and can adapt to more types and shapes of special-shaped curved workpieces. The working principle of rotation is the same as the working principle of the self-adaptive pressing head 58 described above, and will not be described here.

[0033] A spring (not marked in the figure) is arranged at the sliding connection between the abutting block 55 and the fixed block 54;

[0034] The arrangement of the spring makes it possible that the side surface shape of the special-shaped curved workpiece is irregular when the positioning mechanism 5 clamps the special-shaped curved workpiece. When one of the positioning mechanisms 5 reaches the maximum range of movement, the abutting block 55 on the other positioning mechanism 5 can self-adaptively adjust the clamping distance, so that the special-shaped curved workpiece can be pressed in the same position by the pushing mechanism 4 and the two groups of positioning mechanisms 5, and the overall structure of the device can also be more stable;

[0035] In summary, the driving mechanism 2 drives the pushing mechanism 4 to the center of the workbench 3, and the special-shaped curved workpiece is continuously pushed to the positioning mechanism 5. The motor drives the transmission block 51 to rotate, thereby driving the connecting rod 52 installed on both sides of the transmission block 51 to move. The connecting rod 52 pulls the sliding seat 53 to move inward, and the sliding seat 53 drives the fixed block 54 to move, thereby making the abutting block 55 installed thereon move to the side of the special-shaped curved workpiece. When the top end of the abutting block 55 abuts against the side surface of the special-shaped curved workpiece, the fixed block 54 continuously drives the abutting block 55 to move inward. The abutting block 55 slides backward along the fixed block 54 according to the shape of the special-shaped curved workpiece. The sliding block 57 only moves downward in a straight line under the limiting of the vertical limiting block 56, so that the sliding block 57 installed on the abutting block 55 moves downward along the trapezoidal block inclined surface on the abutting block 55, until the pressing head 58 abuts against the upper surface of the special-shaped curved workpiece. The pressing head 58 installed with multiple groups of crescent curved pressing heads 581 adjusts the pressing of the workpiece surface, thereby realizing the pressing effect. The two groups of positioning mechanisms 5 are driven by the transmission block 51, so that the movement distance of the fixed blocks 54 in the two groups of positioning mechanisms 5 is equal, and they all move to the same center. When the pushing mechanism 4 pushes the special-shaped curved workpiece to the positioning mechanism 5, they move together, thereby achieving the effect of centering and positioning. The adaptive adjustment of the device can realize the work on different types of special-shaped curved workpieces, and has a wide range of applications.

[0036] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solutions falling within the scope of the present application are also within the protection scope of the present application. It should be noted that some improvements and refinements made by ordinary skilled in the art without departing from the principles of the present application are also considered within the protection scope of the present application.

Claims

1. A positioning device for drilling a special-shaped curved surface, comprising a receiving plate (1), characterized in that: The transmission mechanism (2) is installed on the receiving plate (1), the workbench (3) is installed on the receiving plate (1), the pushing mechanism (4) is installed on the workbench (3), and the positioning mechanism (5) is installed on the workbench (3). The positioning mechanism (5) comprises a fixed block (54) and a transmission block (51), the fixed block (54) is provided with a sliding seat (53) below, the sliding seat (53) is provided with a connecting rod (52) rotatably installed below, the transmission block (51) is rotatably installed above the receiving plate (1), the transmission block (51) is rotatably connected with the connecting rod (52), the sliding seat (53) is slidably connected with the receiving plate (1), the fixed block (54) is slidably provided with a resisting block (55) above, the resisting block (55) is provided with a trapezoidal block above, the trapezoidal block is slidably provided with a sliding block (57) on the inclined surface, and the sliding block (57) is rotatably provided with a pressing head (58) at the top end.

2. The positioning device for drilling a hole in a workpiece having a complex curved surface according to claim 1, wherein: The positioning mechanism (5) is symmetrically installed with two groups with the center axis of the workbench (3) as the center line.

3. The positioning device for drilling a hole in a workpiece having a complex curved surface according to claim 1, wherein: The transmission mechanism (2) is provided with a pull rod (21), and the pull rod (21) is fixedly connected with the pushing mechanism (4).

4. The positioning device for drilling a hole in a workpiece having a complex curved surface according to claim 1, wherein: The driving mode of the transmission block (51) is motor driving, and the position of the transmission block (51) and the center position of the workbench (3) are on the same axis.

5. The positioning device for drilling a hole in a workpiece having a complex curved surface according to claim 1, wherein: The sliding block (57) is slidably provided with a vertical limiting block (56) on both sides, and the vertical limiting block (56) is fixedly connected with the workbench (3).

6. The positioning device for drilling a hole in a workpiece having a complex curved surface according to claim 1, wherein: The front end of the resisting block (55) is provided with a downward protruding trapezoidal block for resisting the side surface of the special-shaped curved workpiece to control the overall movement of the resisting block (55).

7. The positioning device for drilling a hole in a workpiece having a complex curved surface according to claim 1, wherein: The trapezoidal block inclined surface of the resisting block (55) is rotatably provided with an inclined sliding rail (551).

8. The positioning device for drilling a hole in a workpiece according to claim 1, wherein: The pressing head (58) is rotatably provided with a curved surface pressing head (581) on the upper end.

9. The positioning device for drilling a hole in a workpiece having a complex curved surface according to claim 1, wherein: The sliding connection position of the resisting block (55) and the fixed block (54) is provided with a spring.

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