Grinding device for inner circular hole

Abstract

The utility model discloses a grinding device for an inner circular hole, which comprises a frame, and a combined clamping mechanism and a grinding component are arranged on the frame. The combined clamping mechanism is a vertical clamping mechanism and comprises an upper clamping unit and a lower clamping unit. The grinding machining assembly is formed on the outer side of the upper clamping unit and comprises a plane rotary table and a right-angle arm frame, one end of the right-angle arm frame is connected with the plane rotary table in an assembled mode through a horizontal arm rod, the other end of the right-angle arm frame is connected with the vertical arm rod in an assembled mode through a bearing seat, and the vertical arm rod is of a lifting structure. A machining tool used for grinding machining is assembled at the end of the vertical arm rod. The vertical arm rod is connected with a rotating speed motor at the upper end corresponding to the bearing seat, and can control the machining tool to rotate through the rotating speed motor. According to the utility model, efficient and accurate hole machining can be carried out on workpieces with thin-walled tubes and cylinders, and the stability and the precision of the workpieces in the machining process are ensured.

Description

Technical Field

[0001] The utility model relates to hole processing equipment in the field of machining, in particular to a grinding device for inner circular holes. Background Art

[0002] In the field of machining, it is usually necessary to perform inner hole machining operations on workpieces of pipe and sleeve structure types, mainly including drilling, boring, expanding, reaming, milling and other specific machining methods. Among them, the grinding machining method of inner hole is mainly used to obtain products with smooth inner surface.

[0003] Traditional internal hole grinding devices mostly use a horizontal processing method, that is, the workpiece needs to be placed horizontally during processing, and then one end is inserted into the inner hole of the workpiece for processing. This operation method generally has problems such as low grinding efficiency, unstable processing accuracy, and easy damage to the workpiece during the grinding process for some thin-walled pipes and sleeves. There are also defects in the coaxiality control of the finished product, making it difficult to achieve high-precision processing.

[0004] Therefore, it is necessary to develop a new type of inner hole grinding device to improve machining efficiency and quality and reduce damage and errors during machining. Utility Model Content

[0005] The technical problem solved by the utility model is to provide an inner circular hole grinding device, which can be used to solve the defects in the above technical background.

[0006] The technical problem solved by the utility model is achieved by the following technical solutions:

[0007] A grinding device for inner circular holes comprises a frame, on which a combined clamping mechanism and a grinding processing assembly are arranged;

[0008] The combined clamping mechanism is a vertical clamping mechanism, comprising an upper clamping unit and a lower clamping unit arranged opposite to each other, and the device clamps the workpiece vertically through the upper clamping unit and the lower clamping unit;

[0009] The grinding processing assembly is formed on the outside of the upper clamping unit, and includes a planar turntable and a right-angle arm bracket assembled with the planar turntable. The right-angle arm bracket includes a horizontal arm and a vertical arm bracket. The right-angle arm bracket is assembled and connected to the planar turntable at one end through the horizontal arm bracket, and is assembled and connected to the vertical arm bracket through a bearing seat at the other end of the horizontal arm bracket. The vertical arm bracket is a lifting structure, and a processing tool for grinding processing is assembled at the end of the vertical arm bracket; the vertical arm bracket is connected to a speed motor at the upper end of the corresponding bearing seat, and the speed motor can control the processing tool to rotate.

[0010] As a further limitation, the lower clamping unit is a three-jaw chuck or a four-jaw chuck.

[0011] As a further limitation, the upper clamping unit and the lower clamping unit in the combined clamping mechanism are clamped and fixed at the upper end and the lower end of the part to be processed of the workpiece respectively.

[0012] As a further limitation, the combined clamping mechanism further comprises a stand, the stand is eccentrically arranged on the frame structure of the frame, a guide frame arranged vertically is formed on the stand, the lower clamping unit is fixedly assembled on the guide frame base of the stand; and the upper clamping unit is assembled on the guide frame through an electric control guide seat, can move along the guide frame, and can be fixed at a selected position;

[0013] The guide frame is formed with a scale structure for displaying the clamping distance between the upper clamping unit and the lower clamping unit.

[0014] As a further limitation, the horizontal arm of the right-angle arm is a telescopic structure, and the device adapts to the processing requirements of workpieces with different cross-sectional sizes by telescoping the horizontal arm.

[0015] As a further limitation, the machining tool is a grinding wheel, a grinding head or a cylindrical grinding rod, which can be assembled at the end of the vertical arm through a detachable assembly structure.

[0016] As a further limitation, a coolant supply assembly is also integrated on the vertical arm, and the coolant supply assembly includes a coolant supply pipe trough and a coolant nozzle; the coolant supply pipe trough is formed in the vertical arm, and the outside of the coolant supply pipe trough is connected to an external coolant supply system through a pipeline; the coolant nozzle faces the working surface of the machining tool.

[0017] As a further limitation, the speed motor is preferably a variable frequency motor.

[0018] As a further limitation, the frame is formed with a through hole at a position corresponding to the orthographic projection of the workpiece to be processed for the workpiece to be processed to pass downward.

[0019] Beneficial effects: The inner hole grinding device of the utility model has a simple and compact structure and a reasonable design; it has good adaptability to workpieces of different cross-sectional sizes, and is particularly suitable for inner hole processing of thin-walled tubes and barrels; it realizes efficient and high-precision grinding of the inner hole of the workpiece through a vertical clamping method and a grinding processing component arranged on a combined clamping mechanism, effectively solving the problems of low processing efficiency, unstable processing accuracy, and easy damage to the workpiece in the traditional horizontal processing method, and at the same time, it also meets high-precision requirements in the coaxiality control of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a structural schematic diagram of a preferred embodiment of the utility model.

[0021] Among them: 1. Screw; 2. Main head; 3. Auxiliary head; 4. Processing tool holder; 5. Processing tool; 6. Upper clamping unit; 7. Workpiece to be processed; 8. Lower clamping unit; 9. Machine frame; 10. Telescopic frame; 11. Vertical frame; 12. Machine base; 13. Planar turntable; 14. Rotating shaft; 15. Guide rail. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0023] See also Figure 1 A preferred embodiment of an inner circular hole grinding device is provided. In this embodiment, the inner circular hole grinding device uses a frame 9 as an assembly plane. The frame 9 is assembled on a workbench structure, and the corresponding workbench has a table height greater than the length of a workpiece 7 to be processed. The workbench and the frame 9 are provided with holes for the workpiece 7 to be processed to pass vertically at the processing and assembly positions corresponding to the workpiece to be processed; the workbench is formed with a vertical frame 11 on the right side of the frame 9, and the vertical frame 11 is formed with a vertically arranged guide rail 15 on the corresponding processing side.

[0024] The frame 9 is provided with a lower clamping unit 8 at the corresponding processing assembly position. The lower clamping unit 8 is a four-jaw chuck used to clamp the lower part of the processing area of ​​the workpiece 7 to be processed.

[0025] The stand 11 is equipped with a base 12 on a guide rail 15. The base 12 uses the guide rail 15 as a guide frame structure. The base 12 and the structural parts assembled on the base 12 can be moved up and down along the guide rail 15 by a motor drive and fixed at a selected position. Specifically, it can be reflected in the adjustment of the spacing position between the lower clamping unit 8 and the upper clamping unit 6 arranged on the base 12. In addition, in order to intuitively display the position spacing, a scale structure for displaying the clamping spacing between the upper clamping unit and the lower clamping unit is also formed on the guide frame.

[0026] The machine base 12 is provided with two sets of upper and lower horizontal arm structures, namely a lower horizontal arm and an upper horizontal arm.

[0027] The lower horizontal arm is directly connected to the machine base 12 and the upper clamping unit 6, which is used to clamp the upper part of the processing area of ​​the workpiece 7 to be processed, and is a half-type assembly structure. The upper clamping unit 6 and the lower clamping unit 8 as a combined clamping mechanism can stably and reliably clamp the workpiece vertically, ensuring the stability and accuracy of the workpiece during processing.

[0028] A turntable assembly part is provided on the upper part of the setting plane of the upper horizontal arm of the machine base 12, and a rotating shaft 14 is formed on the turntable assembly part. The main body of the upper horizontal arm is a telescopic frame 10, and the telescopic frame 10 has a planar turntable 13 matched with the rotating shaft 14 formed on the inner side. The planar turntable 13 can be rotated around the rotating shaft 14 on the machine base 12 by a motor drive; the telescopic frame 10 is connected to a processing head as a grinding processing component on the outer side.

[0029] The processing head includes a main head 2 and an auxiliary head 3. The main head 2 of the processing head is assembled with the telescopic frame 10 at the outer end of the telescopic frame 10, and the auxiliary head 3 of the processing head is assembled below the main head 2; the main head 2 is formed with a speed motor that can control the auxiliary head 3 to rotate as a whole. The speed motor is a variable frequency motor. The speed motor can control the rotation speed of the auxiliary head 3 by adjusting the speed of the motor to adapt to different processing requirements; a screw 1 is inserted in the auxiliary head 3, and the screw 1 forms a ball screw mechanism in the auxiliary head 3. At the same time, the auxiliary head 3 is also formed with an electric drive structure for driving the ball screw mechanism, and a processing tool seat 4 is formed at the bottom of the screw 1.

[0030] The ball screw mechanism and the telescopic frame 10 together form an L-shaped arm structure that can control the position of the processing tool holder 4. The direction and position of the processing tool holder 4 can be adjusted through the cooperation of the telescopic frame 10 and the flat turntable 13, so as to facilitate the positioning and centering of the inner hole of the workpiece 7 to be processed in a fixed state, thereby improving the adaptability and flexibility of the device. The ball screw mechanism can drive the processing tool holder 4 at the end of the screw 1 to move up and down, so that the processing tool holder 4 extends into the inner hole of the workpiece 7 to be processed, and performs surface grinding on the inner hole of the workpiece 7 to be processed along the axial direction of the workpiece 7 to be processed.

[0031] In this embodiment, a machining tool assembly portion is formed on the side wall of the machining tool holder 4, and the machining tool 5 can be replaced with different types of machining tools such as grinding wheels, grinding heads or cylindrical grinding rods according to machining requirements to meet different grinding requirements; for example, in this embodiment, the machining tool 5 is a cylindrical grinding rod, and the machining tool 5 is floatingly assembled on the machining tool assembly portion, that is, the machining tool 5 can be floatingly adjusted in radial position relative to the machining tool holder 4. The purpose of such a design is to ensure that when the machining tool 5 is grinding the inner circular hole of the workpiece 7 to be machined, the stability of the grinding process and the machining accuracy requirements can be ensured by adjusting the machining tool 5.

[0032] In addition, in order to improve the efficiency and processing quality of grinding, a coolant supply component is also provided on the processing tool holder 4, and the coolant supply component includes a coolant supply pipe groove and a coolant nozzle; the coolant supply pipe groove is formed in the processing tool holder 4, and the outer side of the coolant supply pipe groove is connected to the coolant supply system through a pipeline; the coolant nozzle is facing the working surface of the processing tool 5, that is, the coolant nozzle is aimed at the inner circular hole of the workpiece 7 to be processed, so that during the processing, the coolant supply system can supply coolant to the coolant nozzle through the coolant supply pipe groove, and the coolant sprayed by the coolant nozzle can directly act on the contact point between the processing tool 5 and the workpiece 7 to be processed, thereby playing a role in reducing the grinding temperature, cleaning the grinding chips and improving the processing surface quality.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the scope of protection of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the scope of protection defined by the claims attached to this application.

Claims

1. A grinding device for inner circular holes, characterized in that: It comprises a frame, on which a combined clamping mechanism and a grinding processing assembly are arranged; The combined clamping mechanism is a vertical clamping mechanism, comprising an upper clamping unit and a lower clamping unit arranged opposite to each other, and the device clamps the workpiece vertically through the upper clamping unit and the lower clamping unit; The grinding processing assembly is formed on the outside of the upper clamping unit, and includes a planar turntable and a right-angle arm bracket assembled with the planar turntable. The right-angle arm bracket includes a horizontal arm and a vertical arm bracket. The right-angle arm bracket is assembled and connected to the planar turntable at one end through the horizontal arm bracket, and is assembled and connected to the vertical arm bracket through a bearing seat at the other end of the horizontal arm bracket. The vertical arm bracket is a lifting structure, and a processing tool for grinding processing is assembled at the end of the vertical arm bracket; the vertical arm bracket is connected to a speed motor at the upper end of the corresponding bearing seat, and the speed motor can control the processing tool to rotate.

2. The inner hole grinding device according to claim 1, characterized in that: The lower clamping unit is a three-jaw chuck or a four-jaw chuck.

3. The inner hole grinding device according to claim 1, characterized in that: The upper clamping unit and the lower clamping unit in the combined clamping mechanism are respectively clamped and fixed at the upper end and the lower end of the part to be processed of the workpiece.

4. The inner hole grinding device according to claim 1, characterized in that: The combined clamping mechanism also includes a stand, which is eccentrically arranged on the frame structure of the frame, and a vertically arranged guide frame is formed on the stand. The lower clamping unit is fixedly assembled on the guide frame base of the stand; and the upper clamping unit is assembled on the guide frame through an electrically controlled guide seat, and can be moved along the guide frame and fixed at a selected position.

5. The inner hole grinding device according to claim 4, characterized in that: The guide frame is formed with a scale structure for displaying the clamping distance between the upper clamping unit and the lower clamping unit.

6. The inner hole grinding device according to claim 4, characterized in that: The lifting structure on the vertical arm is a ball screw.

7. The inner hole grinding device according to claim 1, characterized in that: The horizontal arm of the right-angle arm frame is a telescopic structure, and the device adapts to the processing requirements of workpieces with different cross-sectional sizes by telescoping the horizontal arm.

8. The inner hole grinding device according to claim 1, characterized in that: The machining tool is a grinding wheel, a grinding head or a cylindrical grinding rod, which can be assembled at the end of the vertical arm through a detachable assembly structure.

9. The inner hole grinding device according to claim 1, characterized in that: The vertical arm is also integrated with a coolant supply assembly, which includes a coolant supply pipe groove and a coolant nozzle; the coolant supply pipe groove is formed in the vertical arm, and the outside of the coolant supply pipe groove is connected to an external coolant supply system through a pipeline; the coolant nozzle faces the working surface of the machining tool.

10. The inner hole grinding device according to claim 1, characterized in that: The frame is formed with a through hole at a position corresponding to the orthographic projection of the workpiece to be processed, for the workpiece to be processed to pass downward.

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