Drilling-expanding integrated high-precision and efficient drilling device

Abstract

The utility model discloses a drilling-reaming integrated high-precision efficient drilling device which comprises a cutter handle, a drill handle, an auger bit, a reaming bit, a collet chuck and an ultrasonic vibration system, the cutter handle and the drill handle are both vertically arranged, the ultrasonic vibration system is coaxially arranged on the upper portion of the drill handle, a positioning installation groove with an opening in the bottom is formed in the drill handle, and the auger bit is arranged in the positioning installation groove. The upper portion of the drill handle and the collet are coaxially arranged in the positioning installation groove, the collet is sleeved on the drill handle, the lower end of the cutter handle is in threaded connection with a locking nut used for clamping the cutter handle through the collet, the reamer bit is coaxially arranged at the lower end of the drill handle, and the twist bit is coaxially arranged at the bottom of the reamer bit. According to the utility model, the principle is scientific, the structure is simple and compact, the ultrasonic vibration system is arranged on the cutter handle, and the axial positioning structure for coaxially connecting the positioning drill handle and the cutter handle is arranged, so that the machining precision of drilling and chambering is greatly improved, and meanwhile, the twist drill bit and the chambering drill bit are designed into a whole, so that the machining efficiency is doubled.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical manufacturing, and specifically relates to a high-precision and high-efficiency hole-making device that is integrated with drilling and expanding. Background Art

[0002] At present, drilling and reaming of mechanical parts usually adopts two processes. The first process of drilling is to use a twist drill to remove most of the material. The surface roughness value after processing is large and the quality of the hole outlet is poor. Then, the reaming drill is used to remove the remaining processing allowance. The processing accuracy is high and the processing quality of the previous process can be improved. For example, the tearing damage at the outlet of CFRP (carbon fiber reinforced composite material) hole making. This processing and manufacturing method has cumbersome procedures, low hole making efficiency, and it is difficult to further improve the accuracy. Utility Model Content

[0003] The utility model is to solve the above technical problems and to provide a high-precision and high-efficiency drilling and expanding integrated hole-making device based on ultrasonic vibration processing.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a high-precision and efficient drilling and expanding integrated hole-making device, comprising a tool handle, a drill handle, a twist drill bit, a reaming drill bit, a collet and an ultrasonic vibration system, the tool handle and the drill handle are both vertically arranged, the ultrasonic vibration system is coaxially arranged on the upper part of the drill handle, a positioning and mounting groove with an open bottom is provided inside the drill handle, the upper part of the drill handle and the collet are coaxially arranged in the positioning and mounting groove, the collet is sleeved on the drill handle, the lower end of the tool handle is threadedly connected with a locking nut for clamping the tool handle through the collet, the reaming drill bit is coaxially arranged at the lower end of the drill handle, and the twist drill bit is coaxially arranged at the bottom of the reaming drill bit.

[0005] The positioning and mounting grooves are, from top to bottom, an upper conical section, a middle cylindrical section and a lower conical section. The upper conical section is pointed at the top and thick at the bottom, while the lower conical section is thin at the top and thick at the bottom. The inner diameter of the middle cylindrical section, the inner diameter of the uppermost end of the upper conical section and the inner diameter of the lowermost end of the lower conical section are equal in size. The drill shank is in the shape of a circular shaft. The outer circle of the upper end surface of the drill shank contacts the conical surface of the upper conical section. A circular positioning block is threadedly connected to the drill shank. The outer circle of the positioning block contacts the inner circle of the middle cylindrical section. The outer circle of the collet is a conical cylinder structure that is thick at the top and thin at the bottom. The inner circle of the collet is sleeved on the drill shank. A number of vertical expansion joints are provided in the circumferential direction at the middle and lower part of the collet. A compression spring is sleeved on the drill shank between the top of the collet and the bottom of the positioning block. The outer circle of the lower end of the collet and the lower part of the inner circle of the locking nut are both conical surface structures that are thin at the top and thick at the bottom. The outer circle of the upper part of the locking nut is threadedly connected to the outer circle of the lower end of the shank.

[0006] The ultrasonic vibration system comprises an ultrasonic horn which is coaxially fixedly connected with the tool handle, and a conical connecting piece and an ultrasonic transducer are arranged in sequence from top to bottom on the upper part of the ultrasonic horn through connecting bolts.

[0007] The rotation radius of the reaming drill bit is greater than that of the twist drill bit, and the rotation surface of the outer circle of the lower end of the reaming drill bit is a round chamfer structure with a thin bottom and a thick top.

[0008] A chip guard is arranged on the top of the reaming drill bit, the outer diameter of the chip guard gradually increases from bottom to top, and the maximum outer diameter of the chip guard is greater than the outer diameter of the reaming drill bit.

[0009] By adopting the above technical scheme, during the assembly of the utility model, the locking nut, the collet and the compression spring are sequentially installed on the drill shank from top to bottom, and finally the positioning block is screwed on, and then the upper end of the drill shank is extended into the positioning installation groove, the outer circle of the upper end surface of the drill shank contacts the conical surface of the upper conical section, the outer circle of the positioning block contacts the inner circle of the middle cylindrical section, the locking nut is screwed to the outer circle of the lower end of the tool handle, the conical surface structure of the lower part of the inner circle of the locking nut presses the conical surface structure of the outer circle of the lower end of the collet, the collet is subjected to radial pressure toward the center, the vertical expansion gap of the collet is reduced, and at the same time the collet is moved upward, the compression spring is compressed, until the inner circle of the collet clamps the outer circle of the drill shank, the outer circle of the collet is crimped with the lower conical section, the locking nut is stopped, and the drill shank, the collet and the tool handle are fastened and connected as a whole. Then the conical connector at the top of the drill handle is fixed to the main shaft of the drilling machine, and the ultrasonic transducer is connected to the ultrasonic generator through a wire (the installation and fixing structure of the drill handle and the connection between the ultrasonic transducer and the ultrasonic generator are both existing conventional technologies). Finally, the drilling machine is started, and the twist drill bit and the reaming drill bit rotate simultaneously to perform drilling and reaming operations on the workpiece on the workbench.

[0010] The utility model realizes the coaxial positioning of the drill shank and the tool handle by contacting the upper circular surface of the drill shank with the conical surface of the upper conical section and by contacting the outer circle of the positioning block with the inner circle of the middle cylindrical section. The conical surface of the inner circle of the lower part of the locking nut presses the conical surface of the outer circle of the lower end of the collet, so that the collet radially clamps the drill shank and the collet moves upward to press the lower conical section, thereby realizing the integrated structural setting of the entire hole-making device. The inner circle of the collet and the inner circle of the collet, the outer circle of the drill shank and the inner circle of the lower conical section are all rough surfaces, and the torque transmission is more reliable when pressing.

[0011] The threaded connection position of the positioning block on the drill handle can adjust the elastic force of the compression spring and the force of twisting the locking nut. The chip guard prevents the slag from moving upward and touching the tool handle or ultrasonic wire during drilling and reaming, thereby improving safety.

[0012] To sum up, the utility model has a scientific principle and a simple and compact structure. By arranging an ultrasonic vibration system on the tool handle and installing an axial positioning structure that coaxially connects the positioning drill handle and the tool handle, the processing accuracy of drilling and reaming is greatly improved. At the same time, the twist drill bit and the reaming drill bit are designed as one, which also doubles the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the plane structure of the utility model;

[0014] Figure 2 yes Figure 1 Bottom view of the middle collet. DETAILED DESCRIPTION

[0015] The implementation of the utility model is further described in detail below in conjunction with the drawings and examples.

[0016] like Figure 1-Figure 2 As shown, the utility model is a high-precision and efficient drilling and expanding integrated hole-making device, comprising a tool handle 1, a drill handle 2, a twist drill bit 3, a reaming drill bit 4, a collet 5 and an ultrasonic vibration system. The tool handle 1 and the drill handle 2 are both vertically arranged, the ultrasonic vibration system is coaxially arranged on the upper part of the drill handle 2, a positioning installation groove with an open bottom is provided inside the drill handle 2, the upper part of the drill handle 2 and the collet 5 are coaxially arranged in the positioning installation groove, the collet 5 is sleeved on the drill handle 2, the lower end of the tool handle 1 is threadedly connected with a locking nut 6 for clamping the tool handle 1 through the collet 5, the reaming drill bit 4 is coaxially arranged at the lower end of the drill handle 2, and the twist drill bit 3 is coaxially arranged at the bottom of the reaming drill bit 4.

[0017] The positioning installation groove is composed of an upper conical section 7, a middle cylindrical section 8 and a lower conical section 9 from top to bottom. The upper conical section 7 is sharp at the top and thick at the bottom, and the lower conical section 9 is thin at the top and thick at the bottom. The inner diameter of the middle cylindrical section 8, the inner diameter of the upper end of the upper conical section 7 and the inner diameter of the lower end of the lower conical section 9 are equal in size. The drill handle 2 is in the shape of a circular shaft. The outer circle of the upper end surface of the drill handle 2 contacts the conical surface of the upper conical section 7. A circular positioning block 10 is threadedly connected to the drill handle 2. The outer circle of the positioning block 10 contacts the conical surface of the middle cylindrical section 8. The inner circle is in contact, the outer circle of the collet 5 is a conical cylinder structure that is thick at the top and thin at the bottom, the inner circle of the collet 5 is sleeved on the drill shank 2, and a plurality of vertical expansion joints 11 are opened in the middle and lower part of the collet 5 along the circumferential direction. The drill shank 2 is sleeved with a compression spring 12 located between the top of the collet 5 and the bottom of the positioning block 10, the outer circle of the lower end of the collet 5 and the lower part of the inner circle of the locking nut 6 are both conical surface structures 13 that are thin at the top and thick at the bottom, and the outer circle of the upper part of the locking nut 6 is threadedly connected to the outer circle of the lower end of the shank 1.

[0018] The ultrasonic vibration system includes an ultrasonic horn 14 coaxially fixedly connected to the handle 1, and a conical connector 16 and an ultrasonic transducer 17 are sequentially arranged on the upper part of the ultrasonic horn 14 from top to bottom through a connecting bolt 15. The ultrasonic vibration system is an existing conventional technology, and the internal structure and related connection relationship are not repeated.

[0019] The rotation radius of the reaming drill bit 4 is greater than that of the twist drill bit 3 , and the rotation surface of the outer circle of the lower end of the reaming drill bit 4 is a round chamfer structure 18 that is thinner at the bottom and thicker at the top.

[0020] A chip guard 19 is provided on the top of the reaming drill bit 4 . The outer diameter of the chip guard 19 gradually increases from bottom to top, and the maximum outer diameter of the chip guard 19 is greater than the outer diameter of the reaming drill bit 4 .

[0021] When assembling the utility model, the locking nut 6, the collet 5, and the compression spring 12 are sequentially installed on the drill shank 2 from top to bottom, and finally the positioning block 10 is screwed on, and then the upper end of the drill shank 2 is extended into the positioning installation groove, the outer circle of the upper end surface of the drill shank 2 at the upper end of the drill shank 2 contacts the conical surface of the upper conical section 7, and the outer circle of the positioning block 10 contacts the inner circle of the middle cylindrical section 8, and the locking nut 6 is screwed to the outer circle of the lower end of the tool handle 1, and the conical surface structure 13 of the lower part of the inner circle of the locking nut 6 presses the conical surface structure 13 of the outer circle of the lower end of the collet 5, and the collet 5 is subjected to radial pressure toward the center, so that the vertical expansion joint 11 of the collet 5 is reduced, and at the same time, the collet 5 is moved upward, and the compression spring 12 is compressed until the inner circle of the collet 5 clamps the outer circle of the drill shank 2, and the outer circle of the collet 5 is crimped with the lower conical section, and the locking nut 6 is stopped. The drill shank 2, the collet 5 and the tool handle 1 are fastened and connected as a whole. Then the conical connector 16 at the uppermost end of the drill shank 2 is mounted and fixed to the main shaft of the drilling machine, and the ultrasonic transducer 17 is connected to the ultrasonic generator through a wire (the mounting and fixing structure of the drill shank 2 and the connection between the ultrasonic transducer 17 and the ultrasonic generator are both conventional technologies). Finally, the drilling machine is started, and the twist drill bit 3 and the reaming drill bit 4 rotate simultaneously to perform drilling and reaming operations on the workpiece on the workbench.

[0022] The above embodiments illustrate the basic principles and features of the utility model, but the above only illustrates the preferred embodiments of the utility model and is not limited by the embodiments. Under the inspiration of this patent, ordinary technicians in this field can also make many forms of deformation and improvement without departing from the purpose of the utility model and the scope of protection of the claims, which are all within the scope of protection of the utility model. Therefore, the patent and protection scope of the utility model shall be subject to the attached claims.

Claims

1. A high-precision and high-efficiency drilling and expanding device, characterized in that: The utility model comprises a tool handle, a drill handle, a twist drill bit, a hole-reaming drill bit, a collet and an ultrasonic vibration system. The tool handle and the drill handle are both arranged vertically. The ultrasonic vibration system is coaxially arranged on the upper part of the drill handle. A positioning installation groove with an open bottom is provided inside the drill handle. The upper part of the drill handle and the collet are coaxially arranged in the positioning installation groove. The collet is sleeved on the drill handle. The lower end of the tool handle is threadedly connected with a locking nut for clamping the tool handle through the collet. The hole-reaming drill bit is coaxially arranged on the lower end of the drill handle, and the twist drill bit is coaxially arranged on the bottom of the hole-reaming drill bit.

2. A high-precision and high-efficiency drilling and expanding device according to claim 1, characterized in that: The positioning and mounting grooves are, from top to bottom, an upper conical section, a middle cylindrical section and a lower conical section. The upper conical section is pointed at the top and thick at the bottom, while the lower conical section is thin at the top and thick at the bottom. The inner diameter of the middle cylindrical section, the inner diameter of the uppermost end of the upper conical section and the inner diameter of the lowermost end of the lower conical section are equal in size. The drill shank is in the shape of a circular shaft. The outer circle of the upper end surface of the drill shank contacts the conical surface of the upper conical section. A circular positioning block is threadedly connected to the drill shank. The outer circle of the positioning block contacts the inner circle of the middle cylindrical section. The outer circle of the collet is a conical cylinder structure that is thick at the top and thin at the bottom. The inner circle of the collet is sleeved on the drill shank. A number of vertical expansion joints are provided in the circumferential direction at the middle and lower part of the collet. A compression spring is sleeved on the drill shank between the top of the collet and the bottom of the positioning block. The outer circle of the lower end of the collet and the lower part of the inner circle of the locking nut are both conical surface structures that are thin at the top and thick at the bottom. The outer circle of the upper part of the locking nut is threadedly connected to the outer circle of the lower end of the shank.

3. A high-precision and high-efficiency drilling and expanding device according to claim 1 or 2, characterized in that: The ultrasonic vibration system comprises an ultrasonic horn which is coaxially fixedly connected with the tool handle, and a conical connecting piece and an ultrasonic transducer are arranged in sequence from top to bottom on the upper part of the ultrasonic horn through connecting bolts.

4. A high-precision and high-efficiency drilling and expanding device according to claim 1 or 2, characterized in that: The rotation radius of the reaming drill bit is greater than that of the twist drill bit, and the rotation surface of the outer circle of the lower end of the reaming drill bit is a round chamfer structure with a thin bottom and a thick top.

5. A high-precision and high-efficiency drilling and expanding device according to claim 1 or 2, characterized in that: A chip guard is arranged on the top of the reaming drill bit, the outer diameter of the chip guard gradually increases from bottom to top, and the maximum outer diameter of the chip guard is greater than the outer diameter of the reaming drill bit.

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