Machining device for inner hole spiral groove chamfer

Abstract

The utility model belongs to the technical field of machining, and discloses an inner hole spiral groove chamfer machining device which comprises an installation base (5) and a motor (6). The installation base (5) is of a cylindrical structure, and the outer surface of the installation base (5) is sleeved with a guide sleeve (1). The motor (6) is fixed in the mounting seat (5), an output shaft of the motor (6) is coaxial with the mounting seat (5), and a motor bevel gear is fixedly arranged on the output shaft; two radial rotating shafts (9) are symmetrically arranged on the wall surface of the mounting seat (5), and the rotating shafts (9) can rotate along the axes of the rotating shafts (9); one end of the rotating shaft (9) is arranged in the mounting seat (5) and is coaxially and fixedly connected with a transmission bevel gear, and the other end of the rotating shaft (9) extends out of the wall surface of the mounting seat (5) and is connected with a cutter; and the transmission bevel gear is meshed with the motor bevel gear. The inner hole spiral groove chamfer machining device can achieve machining of inner hole spiral groove chamfers, cannot generate scratches and has the advantage of being high in machining stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, and in particular relates to a processing device for chamfering an inner hole spiral groove. Background Art

[0002] The chamfering of the inner spiral groove is beneficial to reduce stress concentration, and can reduce the deposition of chromium layer at sharp corners during chrome plating, improve the bonding strength between the chromium layer and the substrate, and increase the product life. Therefore, there is usually a requirement for chamfering the inner spiral groove in product design.

[0003] The existing processing methods for chamfering the inner hole spiral groove mainly include electrolytic processing and mechanical processing. The principle of electrolytic processing is to control the concentration of the electrolyte, the current intensity and other factors to process the chamfer and the inner hole spiral groove at the same time through the action of the electric field. The processing efficiency is high, but there are many factors affecting the electrolytic process, such as: current parameters, solution concentration, the straightness of the inner hole, the surface weight of the inner hole, the uniformity of the material structure, etc., and the stability is difficult to grasp. When using mechanical processing, because the cutting force direction of the chamfer is perpendicular to the cutting force direction of the groove depth, simultaneous processing with the spiral groove can easily cause the tool to deviate and twist, and it is very easy to cause scratches. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the stability in the process of chamfering the inner hole spiral groove is difficult to grasp and the tool is scratched.

[0005] In order to solve the above technical problems, the specific technical solutions of the utility model are as follows:

[0006] A processing device for chamfering an inner hole spiral groove, comprising a mounting seat 5 and a motor 6; the mounting seat 5 is a cylindrical structure, and a guide sleeve 1 is sleeved on its outer surface; the motor 6 is fixed inside the mounting seat 5, and its output shaft is coaxial with the mounting seat 5, and a motor bevel gear is fixedly arranged on the output shaft; two radial rotating shafts 9 are symmetrically arranged on the wall surface of the mounting seat 5, and the rotating shaft 9 can rotate along its own axis; one end of the rotating shaft 9 is arranged inside the mounting seat 5 and is coaxially fixedly connected to a transmission bevel gear, and the other end extends out of the wall surface of the mounting seat 5 and is connected to a tool; the transmission bevel gear and the motor bevel gear are meshed with each other.

[0007] The guide sleeve 1 is an annular structure, the inner surface of which is in interference fit with the outer surface of the mounting seat 5, and the outer surface of which is in transition fit with the inner hole wall of the part to be processed.

[0008] Wherein, a front cover 4 and a rear cover 7 are respectively provided at two ends of the mounting seat 5 .

[0009] The electric cable of the motor 6 can be led out from the rear cover 7 to the control box.

[0010] Among them, the material of the guide sleeve is aluminum bronze QAl9-4.

[0011] The utility model has the following advantages: the processing of the chamfer of the inner hole spiral groove can be realized without causing scratches, and the processing stability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an external model diagram of the chamfering processing device;

[0013] Figure 2 This is a structural diagram of the chamfering device (excluding the guide sleeve and dust cover);

[0014] Figure 3 This is a schematic diagram of a traditional system;

[0015] Figure 4 This is a schematic diagram of the mounting base;

[0016] Markings in the figure: 1 is the guide sleeve, 2 is the chamfering tool, 3 is the dust cover, 4 is the front cover, 5 is the mounting seat, 6 is the motor, 7 is the rear cover, 8 is the front positioning sleeve, 9 is the rotating shaft, 10 is the motor bevel gear, 11 is the set screw, 12 is the pin, 13 is the adjusting gasket, 14 is the key, 15 is the bolt, 16 is the rear positioning sleeve, and 17 is the transmission bevel gear. DETAILED DESCRIPTION

[0017] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, the chamfering processing device of the utility model is mainly composed of a guide sleeve 1, a chamfering tool 2, a dust cover 3, a front cover 4, a mounting seat 5, a motor 6, a rear cover 7, a front positioning sleeve 8, a rotating shaft 9, a motor bevel gear 10, a set screw 11, a pin 12, an adjustment gasket 13, a key 14, a bolt 15, a rear positioning sleeve 16, and a transmission bevel gear 17.

[0019] The guide sleeve 1 is an annular structure, mounted on the mounting seat 5, and its inner hole and the outer circle of the mounting seat 5 are interference fit, and its outer circle and the inner hole of the part to be processed are transition fit, so that the device can move according to the inner hole of the part during the chamfering process and play a guiding role. In order to ensure that no scratches are generated on the inner hole of the part during the processing while having a certain wear resistance, the material of the guide sleeve is recommended to be aluminum bronze QAl9-4.

[0020] The chamfering tool 2 is mounted on the rotating shaft 9 via a set screw 11, and the shape and angle of the cutting portion can be replaced and adjusted according to design requirements.

[0021] The dust cover 3 is a thin cylindrical part, which is installed between the two guide sleeves 1 to prevent impurities such as powder in the cutting process from falling into the mounting seat 5 and affecting the electrical control of the motor and the stability of the transmission process.

[0022] The front cover 4 is connected to the mounting seat 5 by threads, which plays a sealing role and isolates impurities such as powder during the cutting process.

[0023] The mounting seat 5 is a cylindrical structure, and is provided with a motor mounting hole, a rotating shaft mounting hole, a rear positioning sleeve mounting hole and a transmission bevel gear mounting hole, and is used for mounting and fixing the transmission system.

[0024] The motor 6 provides power for the chamfering and is connected to the mounting base 5 by bolts 15. The cable of the motor 6 can be led out from the rear cover 7 to the control box to achieve the adjustment and control of parameters such as the electrolysis speed.

[0025] The rear cover 7 is connected to the mounting seat 5 through threads, which plays a sealing role and isolates impurities such as powder during the cutting process; at the same time, it is connected to the boring bar of the machine tool through threads, and the movement of the device in the inner hole is realized by the machine tool.

[0026] The transmission system of the device is composed of the front positioning sleeve 8, the rotating shaft 9, the motor bevel gear 10, the adjustment shim 13, the key 14, the rear positioning sleeve 16 and the transmission bevel gear 17. The function of the transmission system is to transmit the power provided by the motor to the chamfering tool 2, so as to realize the chamfering of the inner hole spiral groove. The motor 6 is connected to the motor bevel gear 10 through the key 14, and the transmission bevel gear 17 is connected to the rotating shaft 9 through the spline structure, and is positioned with the mounting seat 5 through the front positioning sleeve 8, the pin 12, the bolt 15 and the rear positioning sleeve 16. The adjustment shim 13 is located between the transmission bevel gear 17 and the bottom surface of the transmission bevel gear mounting hole of the mounting seat 5, and is used to adjust the installation position of the transmission bevel gear 17 to ensure that the meshing is in place and the transmission is smooth.

[0027] First, the motor 6 is installed on the mounting seat 5 through the bolt 15, and then the motor bevel gear is installed together with the motor 6 through the key 14, and then the transmission bevel gear 17 is installed in the transmission bevel gear mounting hole of the mounting seat 5, and the transmission is smooth by installing the appropriate adjustment gasket 13 in the transmission bevel gear mounting hole, and then the rotating shaft 9 is connected with the transmission bevel gear 17 through the spline, and the front positioning sleeve 8 is fixed to the transmission bevel gear 17 through the bolt 15, and then the rear positioning sleeve 16 is installed in the rear positioning sleeve mounting hole of the mounting seat 5, and connected with the rotating shaft 9 through the pin 12, so as to realize the relative position fixing of each part of the traditional system. Finally, the dust cover 3, the front cover 4, and the rear cover 7 are installed in turn. When processing the chamfering of the inner hole spiral groove, after adjusting the chamfering tool 2 to the appropriate position, tighten the set screw 11, and then the motor can be started to start the chamfering process. The rear cover 7 is connected to the spiral groove processing machine tool, and can be chamfered according to the same trajectory as the spiral groove through the CNC program.

[0028] After the inner hole spiral groove is processed by mechanical broaching equipment, the chamfering processing device of this embodiment is used to complete the chamfering of the inner hole spiral groove.

[0029] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make several modifications and improvements without departing from the principle of the present invention, and these modifications and improvements should also be considered to belong to the protection scope of the present invention.

Claims

1. A processing device for chamfering an inner hole spiral groove, characterized in that: The invention comprises a mounting seat (5) and a motor (6); the mounting seat (5) is a cylindrical structure, and a guide sleeve (1) is sleeved on its outer surface; the motor (6) is fixed inside the mounting seat (5), and its output shaft is coaxial with the mounting seat (5), and a motor bevel gear is fixedly arranged on the output shaft; two radial rotating shafts (9) are symmetrically arranged on the wall surface of the mounting seat (5), and the rotating shaft (9) can rotate along its own axis; one end of the rotating shaft (9) is arranged inside the mounting seat (5) and is coaxially fixedly connected to a transmission bevel gear, and the other end extends out of the wall surface of the mounting seat (5) and is connected to a tool; the transmission bevel gear and the motor bevel gear are meshed with each other.

2. The device for processing chamfering of inner hole spiral groove according to claim 1, characterized in that: The guide sleeve (1) is an annular structure, the inner surface of which is in interference fit with the outer surface of the mounting seat (5), and the outer surface of which is in transition fit with the inner hole wall of the part to be processed.

3. The device for processing chamfering of inner hole spiral groove according to claim 1, characterized in that: A front cover (4) and a rear cover (7) are respectively provided at both ends of the mounting seat (5).

4. The device for processing chamfering of inner hole spiral groove according to claim 3, characterized in that: The electric cable of the motor (6) can be led out from the rear cover (7) to the control box.

5. The device for processing chamfering of inner hole spiral groove according to claim 1, characterized in that: The guide sleeve is made of aluminum bronze QAl9-4.

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