Drilling tool

Abstract

The utility model relates to a drilling tool which is characterized in that the drilling tool comprises a clamp body, an elastic chuck, a driving plate and a positioning plate, a chuck hole is formed in the clamp body, and an orifice of the chuck hole is expanded outwards to be conical; the circular-truncated-cone-shaped elastic chuck is arranged in the chuck hole, and the inclined hole wall of the chuck hole is attached to the surface of the elastic chuck; the driving plate is arranged on the clamp body, a first cavity is formed among the driving plate, the clamp body and the elastic chuck, and a medium passage communicated with the first cavity is formed in the driving plate; a clamping hole is formed in the elastic chuck in the axis direction of the chuck hole in a penetrating mode, a first through hole is formed in the driving plate, and the clamping hole communicates with the first cavity. The workpiece is clamped through the conical surface between the elastic chuck and the clamp body, whether the workpiece is clamped in place or not is rapidly detected through the positioning plate, the workpiece clamping speed and stability are guaranteed, and automation can be achieved conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a drilling tooling fixture. Background Art

[0002] Drilling is a commonly used machining process in mechanical processing and is widely used in industries such as automotive, aerospace, oil and gas, machine tools, electronic equipment and medical devices.

[0003] During the drilling process, especially when drilling deep holes, the drill bit will continue to drill the workpiece for a long time. If the workpiece is loose or deformed during the clamping process, it will cause uneven drilling diameter, drilling position deviation from design requirements or unstable cutting process, thus affecting the assembly and appearance of the workpiece. Therefore, it is very important to improve the clamping stability of the workpiece.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a drilling tool to improve the stability of a workpiece during drilling.

[0006] The technical solution of the utility model is as follows:

[0007] A drilling tool comprises a clamp body, an elastic clamp, a drive plate and a positioning plate, wherein a clamp hole is arranged on the clamp body, and the orifice of the clamp hole is expanded outward in a conical shape; the truncated cone-shaped elastic clamp is arranged in the clamp hole, and the inclined hole wall of the clamp hole fits the surface of the elastic clamp; the drive plate is arranged on the clamp body, and a first cavity is formed between the drive plate, the clamp body and the elastic clamp, and a medium passage connected to the first cavity is provided on the drive plate; a clamping hole is penetrated by the elastic clamp along the axial direction of the clamp hole, and a first through hole is provided on the drive plate, and the clamping hole is connected to the first cavity; the positioning plate is arranged on the drive plate to block the first through hole, and a side of the positioning plate close to the drive plate is a positioning surface, and an air hole is provided on the positioning surface connected to the first through hole.

[0008] The beneficial technical effects of the utility model are as follows:

[0009] (1) In the drilling tool of the utility model, a fitting conical surface is provided between the elastic chuck and the clamp body, and a first cavity is provided on the side of the larger size of the elastic chuck. By filling the medium into the first cavity through the medium passage, the elastic chuck can be squeezed to move toward the narrow side of the chuck hole. During the movement, the elastic chuck is squeezed by the narrowed hole wall of the chuck hole, so that the elastic chuck shrinks, and then the aperture of the clamping hole is reduced to clamp the workpiece. The clamping action is completed by filling the medium into the first cavity, and no manual clamping operation is required. The response is fast and the clamping force is large. In addition, a positioning plate is provided, and an air hole is provided on the positioning plate. While the workpiece is quickly positioned by the positioning plate, the workpiece is against the air hole. By opening and closing the air hole, it can be quickly determined whether the workpiece is placed in place, which is also convenient for automatic detection. The workpiece clamping speed is improved and the drilling efficiency is improved. At the same time, the simple clamping operation and the rapid positioning function of the air hole not only improve the processing efficiency during manual processing, but also facilitate the realization of automated production.

[0010] (2) Furthermore, two elastic chucks are provided, and the two elastic chucks cooperate with each other to clamp the workpiece, thereby improving the clamping stability.

[0011] (3) Furthermore, the positioning plate positions the workpiece through three positioning protrusions, and three-point positioning ensures that when the workpiece is correctly placed, the three air holes are blocked at the same time, thereby reducing the error rate of accurately judging whether the workpiece is placed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The cross-sectional structure diagram of the drilling tool of the utility model after the connecting plate and the supporting plate are hidden is shown.

[0013] Figure 2 A three-dimensional structural schematic diagram of the drilling tool of the utility model is shown.

[0014] Markings in the accompanying drawings:

[0015] 1. Clamp body; 11. Clamp hole; 12. Limiting protrusion; 2. Elastic clamp; 21. Limiting groove; 22. Clamping hole; 3. Drive plate; 31. First cavity; 32. Medium passage; 321. First passage; 322. Second passage; 33. First through hole; 4. Positioning plate; 41. Air hole; 42. Positioning protrusion; 5. Cover plate; 51. Second cavity; 52. Second through hole; 6. Connecting plate; 7. Support plate; 71. Nozzle; 8. Workpiece. DETAILED DESCRIPTION

[0016] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the attached drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the attached drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0017] In the description of the present invention, the orientations or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] Figure 1 The cross-sectional structure diagram of the drilling tool of the utility model after the connecting plate and the supporting plate are hidden is shown. Figure 2 The three-dimensional structural diagram of the drilling tool of the utility model is shown. Figure 1 and Figure 2A drilling tool comprises a clamp body 1, an elastic chuck 2, a driving plate 3 and a positioning plate 4. A chuck hole 11 is arranged on the clamp body 1, and the opening of the chuck hole 11 is expanded outward in a conical shape. The truncated cone-shaped elastic chuck 2 is arranged in the chuck hole 11, and the inclined hole wall of the chuck hole 11 fits the surface of the elastic chuck 2. The driving plate 3 is arranged on the clamp body 1, and a first cavity 31 is formed between the driving plate 3, the clamp body 1 and the elastic chuck 2. A medium passage 32 connected to the first cavity 31 is provided on the driving plate 3. Along the axial direction of the chuck hole 11, a clamping hole 22 is provided through the elastic chuck 2, and a first through hole 33 is provided on the driving plate 3, and the clamping hole 22 is connected to the first cavity 31. The positioning plate 4 is arranged on the driving plate 3 to block the first through hole 33, and the side of the positioning plate 4 close to the driving plate 3 is a positioning surface, and an air hole 41 is provided on the positioning surface connected to the first through hole 33. By filling the medium into the first cavity 31 through the medium passage 32, the elastic chuck 2 can be squeezed to move to the narrow side of the chuck hole 11. During the movement, the elastic chuck 2 is squeezed by the narrowed hole wall of the chuck hole 11, so that the elastic chuck 2 shrinks, and then the aperture of the clamping hole 22 is reduced to clamp the workpiece 8. The clamping action is completed by filling the medium into the first cavity 31, and no manual clamping operation is required. The response is fast and the clamping force is large. In addition, a positioning plate 4 is provided, and an air hole 41 is provided on the positioning plate 4. While the workpiece 8 is quickly positioned by the positioning plate 4, the workpiece 8 is against the air hole 41. By turning the air hole 41 on and off, it can be quickly determined whether the workpiece 8 is in place. Improve the clamping speed of the workpiece 8 and improve the drilling efficiency

[0019] The specific structure of the clamp body 1 and the sealing ring is described below:

[0020] Please refer to Figure 1 , the chuck hole 11 passes through the clamp body 1, and elastic chucks 2 are respectively arranged at both ends of the chuck hole 11. The two elastic chucks 2 cooperate to clamp the workpiece 8 to improve the stability of clamping. A limiting protrusion 12 is arranged on the hole wall of the chuck hole 11, and a limiting groove 21 is provided on the elastic chuck 2 for the limiting protrusion 12 to be clamped. The limiting protrusion 12 and the limiting groove 21 cooperate to limit the relative position of the elastic chuck 2 and the clamp body 1 to prevent the elastic chuck 2 from falling from the clamp body 1. At the same time, it is prevented that the elastic chuck 2 extends too far into the chuck hole 11, causing the elastic chuck 2 and the clamp body 1 to be stuck. Sealing rings are arranged between the clamp body 1 and the drive plate 3, between the clamp body 1 and the cover plate 5, between the positioning plate 4 and the drive plate 3, in the first through hole 33 and in the second through hole 52 to prevent the leakage of the medium in the first cavity 31 and the second cavity 51 and ensure the stability of clamping.

[0021] The specific structure of the cover plate 5 and the medium passage 32 is described below:

[0022] Please refer to Figure 1A cover plate 5 is provided on the clamp body 1 away from the first cavity 31, and a second cavity 51 is formed between the cover plate 5, the clamp body 1 and the elastic clamp 2 close to the cover plate 5. A second through hole 52 is provided on the cover plate 5 along the axial direction of the clamp hole 11. The medium is introduced into the second cavity 51, and the pressure generated by the medium is used to push the elastic clamp 2 connected to the second cavity 51 deep into the clamp hole 11. During the movement, the elastic clamp 2 is squeezed by the narrowed hole wall of the clamp hole 11, so that the elastic clamp 2 shrinks, thereby reducing the aperture of the clamping hole 22 to clamp the workpiece 8.

[0023] Please refer to Figure 1 When the second cavity 51 is connected to the first cavity 31, when the first passage 321 in the medium passage 32 fills the medium into the first cavity 31, the medium will flow into the second cavity 51 at the same time, and the gas in the first cavity 31 and the second cavity 51 will flow out along the second passage 322. Alternatively, another medium passage 32 connected to the second cavity 51 is opened on the cover plate 5, and the medium passage 32 fills the second cavity 51 to drive the elastic clamp 2 close to the cover plate 5 to clamp.

[0024] The medium may be any medium known in the art for transmitting pressure, such as hydraulic oil.

[0025] The specific structures of the positioning plate 4, the connecting plate 6 and the supporting plate 7 are described below:

[0026] Please refer to Figure 1 , three positioning protrusions 42 are arranged on the positioning surface of the positioning plate 4, and the air holes 41 are opened on the positioning protrusions 42. The three positioning protrusions 42 can stably support a plane of the workpiece 8, and the plane will contact all three positioning protrusions 42 at the same time, ensuring that when the plane of the workpiece 8 is fully supported by the three positioning protrusions 42, the three air holes 41 on the three positioning protrusions 42 are all blocked by the workpiece 8. The accuracy of judging whether the workpiece 8 is fully positioned through the air holes 41 is improved.

[0027] The workpiece 8 can pass through the positioning plate 4, and the positioning protrusion 42 presses against the protrusion on the side of the workpiece 8 to position the workpiece 8. When the tooling in the present application is installed on a rotatable workbench, such as a four-axis processing device, the tooling can be rotated 180 degrees to align the other end of the workpiece 8 with the processing tool, so that the workpiece 8 can be positioned and clamped once, and the deep and long holes at both ends can be processed, which can better meet the needs of automated and efficient processing.

[0028] Please refer to Figure 2, further comprising a vertically arranged connecting plate 6 and a supporting plate 7 perpendicular to the connecting plate 6, the two connecting plates 6 being arranged on opposite sides of the supporting plate 7, the clamping body 1 being bolted to the supporting plate 7, and the clamping body 1 being arranged through the supporting plate 7. When clamping the workpiece 8 on the machine tool, the two relatively arranged chucks of the machine tool are respectively bolted to the vertically arranged connecting plate 6, and the position of the supporting plate 7 is fixed by the connecting plate 6 to clamp the workpiece 8.

[0029] The support plate 7 is provided with a nozzle 71, which is aimed at the end of the clamp body 1 away from the positioning plate 4, and the nozzle 71 is connected to an air source (not shown in the figure). The chips generated during drilling will fall on the clamp body 1, and the chips can be quickly cleaned by blowing air through the nozzle 71.

[0030] The specific working process of the utility model is as follows:

[0031] Taking the connection between the first cavity 31 and the second cavity 51 as an example, firstly, the connecting plate 6 is fixed on the chuck by bolt connection, and the supporting plate 7 and the connection are connected by bolts. The operator or the loading device inserts the workpiece 8 into the clamping hole 22 until the workpiece 8 abuts against the positioning protrusion 42 on the positioning plate 4. At this time, the workpiece 8 abuts against the plane of the positioning protrusion 42, which will block the air hole 41 on the positioning protrusion 42. After judging that the air hole 41 is blocked, it is determined that the workpiece 8 is positioned. Then, the medium is filled into the first cavity 31 and the second cavity 51 through the first passage 321 in the medium passage 32, and the gas in the first cavity 31 and the second cavity 51 is discharged along the second passage 322. The medium filled into the first cavity 31 and the second cavity 51 transmits pressure to the elastic chuck 2, pushing the elastic chuck 2 to move to the side where the chuck hole 11 is narrowed. Under the action of the hole wall of the chuck hole 11, the elastic chuck 2 shrinks, and the aperture of the clamping hole 22 of the elastic chuck 2 shrinks to clamp the workpiece 8. The installation of the workpiece 8 is completed.

[0032] It can be seen that the above-mentioned drilling tool utilizes the conical surface between the elastic chuck 2 and the clamp body 1 to allow the clamp body 1 to drive the elastic chuck 2 to deform and shrink the clamping hole 22, so as to quickly and stably clamp the workpiece 8. And the positioning plate 4 is used to quickly detect whether the workpiece 8 is clamped in place to ensure the speed and stability of the clamping of the workpiece 8. The simple clamping method and the rapid detection function allow the tool in this application to be conveniently used on the automated production line.

[0033] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A drilling tool, characterized in that: It includes a clamp body, an elastic clamp, a drive plate and a positioning plate. A chuck hole is arranged on the chuck body, and the opening of the chuck hole expands outwards in a conical shape; The truncated cone-shaped elastic chuck is arranged in the chuck hole, and the inclined hole wall of the chuck hole fits the surface of the elastic chuck; The driving plate is arranged on the clamp body, a first cavity is formed between the driving plate, the clamp body and the elastic clamp, and a medium passage communicating with the first cavity is provided on the driving plate; Along the axial direction of the chuck hole, a clamping hole is formed on the elastic chuck, a first through hole is formed on the driving plate, and the clamping hole is connected to the first cavity; The positioning plate is arranged on the driving plate to block the first through hole. A side of the positioning plate close to the driving plate is a positioning surface. An air hole is arranged on the positioning surface connected to the first through hole.

2. The drilling tool according to claim 1, characterized in that: The chuck hole passes through the chuck body, and elastic chucks are respectively arranged at both ends of the chuck hole.

3. The drilling tool according to claim 2, characterized in that: A cover plate is arranged on the clamp body away from the first cavity, and a second cavity is formed between the cover plate, the clamp body and the elastic clamp close to the cover plate; a second through hole is opened on the cover plate along the axial direction of the clamp hole.

4. The drilling tool according to claim 3, characterized in that: The second cavity is connected to the first cavity, or a medium passage connected to the second cavity is opened on the cover plate.

5. The drilling tool according to claim 1, characterized in that: The medium passage includes a first passage and a second passage which are separately arranged.

6. The drilling tool according to claim 1, characterized in that: A limiting protrusion is arranged on the hole wall of the clamp hole, and a limiting groove is arranged on the elastic clamp for the limiting protrusion to be inserted into.

7. The drilling tool according to claim 1, characterized in that: Three positioning protrusions are arranged on the positioning surface of the positioning plate, and the air holes are opened on the positioning protrusions.

8. The drilling tool according to claim 1, characterized in that: It also includes a vertically arranged connecting plate, and a supporting plate perpendicular to the connecting plate, two connecting plates are arranged on opposite sides of the supporting plate, and the clamping body is arranged on the supporting plate.

9. The drilling tool according to claim 8, characterized in that: A nozzle is arranged on the support plate, the nozzle is aligned with one end of the clamp body away from the positioning plate, and the nozzle is connected to an air source.

10. The drilling tool according to claim 1, characterized in that: Sealing rings are arranged between the clamp body and the driving plate, between the positioning plate and the driving plate, and in the first through hole.

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