Internal thread composite grinding machine with online contour detection function

Abstract

The internal thread composite grinding machine comprises a machine body and a machining part arranged on the machine body, the machine body comprises an X-axis sliding plate and a Z-axis sliding plate which are vertically arranged, the Z-axis sliding plate is provided with a workpiece main shaft capable of rotating around a C axis, the X-axis sliding plate is vertically provided with a rotary table capable of rotating around a B1 axis, and the Z-axis sliding plate is provided with a workpiece main shaft capable of rotating around a B1 axis. The machining part is located on the rotary table, the rotary table is further provided with an online detection device, the online detection device comprises a measuring probe capable of rotating around the B2 axis and a first encoder used for detecting the rotating angle of the measuring probe, and in the machining process of the machining part, online measurement and real-time compensation are conducted on the thread profile; therefore, contour detection can be directly carried out on a machine tool, secondary disassembly and clamping are not needed, the machining efficiency is further improved, and the device belongs to the technical field of thread machining.

Description

Technical Field

[0001] The utility model belongs to the technical field of thread processing, and more specifically relates to an internal thread composite grinding machine with on-line profile detection. Background Art

[0002] A thread is a continuous raised part with a specific cross-section in a spiral shape made on the surface of a cylindrical or conical parent body. Most of the domestic internal thread grinding machines are grinding centers with compound machining of internal thread, outer circle and end face. With the increasing requirements of users for the quality of lead screw products and the popularization of profilometers, the profile error of lead screws has become an obstacle to further improving the quality of lead screws.

[0003] However, the detection device of the existing internal thread grinding machine only functions for tool setting or comparative measurement of a certain point, and cannot accurately compensate the real-time profile of the machined part in time, and cannot directly perform profile detection on the machine tool. Secondary disassembly and clamping are required, which is time-consuming and laborious. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide an internal thread composite grinding machine with on-line profile detection, which can further improve the processing efficiency and perform on-line measurement and real-time compensation of the thread profile.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] An internal thread composite grinding machine with on-line profile detection, including a bed body and a processing part arranged on the bed body. The bed body includes an X-axis slide plate and a Z-axis slide plate arranged vertically. A workpiece spindle capable of C-axis rotation is provided on the Z-axis slide plate. A turntable capable of rotating around a B1 axis is vertically provided on the X-axis slide plate. The processing part is located on the turntable. An on-line detection device capable of on-line measurement and real-time compensation of the thread profile during the processing of the processing part is further provided on the turntable. The on-line detection device includes a measuring probe capable of rotating around a B2 axis and a first encoder for detecting the rotation angle of the measuring probe.

[0007] In a specific embodiment of the utility model, the processing part includes a column and a first processing shaft and a second processing shaft capable of performing swing angle processing respectively. The first processing shaft and the second processing shaft can perform station rotation operation through the turntable.

[0008] In a specific embodiment of the utility model, a first driving component and a second driving component are provided on the column. The first processing shaft and the second processing shaft can perform automatic swing angle respectively under the action of the first driving component and the second driving component.

[0009] In a specific embodiment of the present utility model, the measuring probe is installed on one side of the column. The measuring probe can be moved to a predetermined position driven by the X-axis slide plate, and contour measurement is performed through Z-axis movement and B2-axis swing, so that after the on-line detection device obtains continuous contour data, real-time parameter compensation is performed.

[0010] In a specific embodiment of the present utility model, a dresser device is provided on the side surface of the workpiece spindle.

[0011] In a specific embodiment of the present utility model, the bed further includes an X-direction transmission mechanism and a Z-direction transmission mechanism for driving the X-axis slide plate and the Z-axis slide plate.

[0012] One of the technical solutions in the above technical solutions of the present utility model has at least the following advantages or beneficial effects:

[0013] By providing an on-line detection device, the present utility model performs on-line measurement and real-time compensation on the thread contour during the processing of the machining part, thereby realizing direct contour detection on the machine tool without secondary disassembly and clamping, and further improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further describes the present utility model in conjunction with the drawings and embodiments;

[0015] Attached Figure 1 is the overall structure diagram of an embodiment of the present utility model;

[0016] Attached Figure 2 is the structure diagram of another perspective of an embodiment of the present utility model;

[0017] Attached Figure 3 is the front view of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals always represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship involved, such as up, down, front, back, left, right, etc., indicates the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation of the present utility model.

[0020] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, or a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components, indirect communication or the interaction relationship between two components.

[0023] The following disclosure provides many different embodiments or examples for implementing different solutions of the present utility model.

[0024] Refer to the attached Figure 1 to the attached Figure 3 As shown in the figure, an internal thread composite grinding machine with on-line profile detection includes a machine body 1, a machining part 2 and an on-line detection device 5. The machine body 1 includes an X-axis slide plate 11 and a Z-axis slide plate 12 which are vertically arranged, and an X-direction transmission mechanism 14 and a Z-direction transmission mechanism 15 for driving the X-axis slide plate 11 and the Z-axis slide plate 12.

[0025] In an embodiment of the present utility model, the machining part 2 is located on a turntable 3. The machining part 2 includes a column 21 and a first machining shaft 22 and a second machining shaft 23 which can respectively perform swing angle machining. A first driving component 6 and a second driving component 7 are arranged on the column 21. The first machining shaft 22 and the second machining shaft 23 can respectively perform automatic swing angles under the action of the first driving component 6 and the second driving component 7, so that various combinations can be carried out to meet different machining requirements.

[0026] In one embodiment of the present utility model, a workpiece spindle 13 capable of C-axis rotation is provided on the Z-axis slide plate 12, and a turntable 3 capable of rotating around the B1 axis is vertically provided on the X-axis slide plate 11. The workpiece spindle 13 adopts an electric spindle and is cooled by a cooler to maintain a constant temperature, so as to ensure stable operation and high precision.

[0027] In one embodiment of the present utility model, the first machining shaft 22 is a high-rigidity and high-precision spindle with a front-mounted bearing specifically designed for long nut parts. The first machining shaft 22 can not only install a thickened straight shank grinding rod to grind the inner raceway of the nut deep hole, but also install a specially designed corresponding elbow grinding rod to grind the inner raceway of the long nut with a large lead, thereby broadening the processing types of nuts that can be processed by this grinding machine.

[0028] In one embodiment of the present utility model, the first machining shaft 22 and the second machining shaft 23 can be respectively installed as an external thread spindle and an internal thread grinding wheel spindle to complete the compound grinding of internal and external threads, or the first machining shaft 22 and the second machining shaft 23 can be respectively installed as an internal thread spindle and an external cylindrical and end face grinding wheel spindle to complete the compound grinding of internal threads, external circles, and end faces. Moreover, the workpiece spindle 13, the first machining shaft 22, and the second machining shaft 23 can all be installed with encoders to achieve closed-loop control.

[0029] In one embodiment of the present utility model, the first machining shaft 22 and the second machining shaft 23 can perform station rotation operations through the turntable 3, and a tool magazine is provided outside the machining part 2. The tool magazine can be linked with the second machining shaft 23 for tool change operations. When the second machining shaft 23 is installed with a rough grinding wheel, the rough grinding wheel can be selected with a small grain size and high hardness of the grinding wheel, so as to achieve fast grinding efficiency; during fine grinding, the tool magazine can automatically change the tool on the second machining shaft 23 and install a fine grinding wheel for grinding. The fine grinding wheel can be selected with a large grain size, low hardness, good retention of the grinding wheel, and good grinding finish. In this way, the rough and fine machining process requirements of the part can be completed with one clamping, ensuring the machining accuracy and greatly improving the machining efficiency.

[0030] In one embodiment of the present utility model, the on-line detection device 5 has two functions of thread profile measurement and internal thread pitch diameter measurement. The on-line detection device 5 can perform on-line measurement and real-time compensation of the thread profile during the machining process of the machining part 2.

[0031] In one embodiment of the present utility model, the on-line detection device 5 includes a measuring probe 51 capable of rotating around the B2 axis and a first encoder for detecting and analyzing the rotation angle of the measuring probe 51. Moreover, the on-line detection device 5 is installed on the column 21 and is controlled by a servo motor to rotate around the B2 axis, and also provides a damping torque for the measuring probe 51 during measurement.

[0032] In one embodiment of the present utility model, the measuring probe 51 is installed on one side of the column 21. The measuring probe 51 can be moved to a predetermined position driven by the X-axis slide 11, and contour measurement is performed through Z-axis movement and B2-axis swing, so that after the on-line detection device 5 obtains continuous contour data, real-time parameter compensation is carried out.

[0033] In one embodiment of the present utility model, a dresser device 8 is provided on the side surface of the workpiece spindle 13. The dresser device 8 can be used according to actual production requirements. After grinding for a period of time, when the grinding wheel is deformed or dull, particles will appear on the surface of the grinding wheel. At this time, the dresser device 8 can be used to grind the grinding wheel.

[0034] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An internal thread compound grinding machine with online profile detection, comprising a bed (1) and a processing part (2) arranged on the bed (1), wherein the bed (1) comprises an X-axis slide (11) and a Z-axis slide (12) arranged vertically, and the Z-axis slide (12) is provided with a workpiece spindle (13) capable of C-axis rotation, characterized in that: A turntable (3) which can rotate around the B1 axis is vertically arranged on the X-axis slide (11), and the processing part (2) is located on the turntable (3). The turntable (3) is also provided with an online detection device (5) which can perform online measurement and real-time compensation on the thread profile during the processing of the processing part (2). The online detection device (5) includes a measuring probe (51) which can rotate around the B2 axis and a first encoder for detecting the rotation angle of the measuring probe (51).

2. The internal thread compound grinding machine with online profile detection according to claim 1, characterized in that: The processing section (2) comprises a column (21) and a first processing axis (22) and a second processing axis (23) which can respectively perform swing angle processing; the first processing axis (22) and the second processing axis (23) can perform station rotation operation via the turntable (3).

3. The internal thread compound grinding machine with online profile detection according to claim 2 is characterized in that: The column (21) is provided with a first drive assembly (6) and a second drive assembly (7), and the first processing axis (22) and the second processing axis (23) can automatically swing under the action of the first drive assembly (6) and the second drive assembly (7), respectively.

4. The internal thread compound grinding machine with online profile detection according to claim 2, characterized in that: The measuring probe (51) is installed on one side of the column (21). The measuring probe (51) can be moved to a predetermined position driven by the X-axis slide (11) and perform contour measurement through Z-axis movement and B2-axis swing, so that the online detection device (5) can perform real-time parameter compensation after obtaining continuous contour data.

5. The internal thread compound grinding machine with online profile detection according to claim 1, characterized in that: A dresser device (8) is provided on the side of the workpiece spindle (13).

6. The internal thread compound grinding machine with online profile detection according to claim 1, characterized in that: The bed (1) also includes an X-axis transmission mechanism (14) and a Z-axis transmission mechanism (15) for driving the X-axis slide plate (11) and the Z-axis slide plate (12).

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