CN106272079A - Emery wheel can the screw rod grinding attachment of restoring on line - Google Patents

Abstract

The invention discloses a screw grinding device with on-line trimming of the grinding wheel, which comprises a screw workbench for installing the screw and driving the screw to rotate around the axis, which is arranged on one lateral side of the screw workbench and can move horizontally along the radial direction of the screw The grinding wheel frame, the rotary table mounted on the grinding wheel frame in a manner that can slide vertically and rotate around the horizontal direction, and the grinding wheel and dresser installed on the rotary table at the same time, the grinding device is now Some screw grinders integrate a set of grinding wheel on-line dressing device, which directly feeds back the measurement results of the workpiece to the grinding wheel dressing program of the machine tool, and completes the grinding wheel dressing on the machine, thereby greatly improving the machining efficiency and accuracy of the machine tool and avoiding grinding wheel dressing After repeated positioning error.

Description

Screw Grinding Device with Online Dressing of Grinding Wheel

technical field

The invention relates to the field of screw grinding devices, in particular to a screw grinding device with online dressing of grinding wheels.

Background technique

Screw is the core component of screw machinery such as screw compressor, screw multi-phase mixed pump, screw vacuum pump, screw expander, screw extruder, etc. Widely used in petroleum, chemical industry, aerospace, offshore drilling platforms, environmental protection, electric power and other major high-end equipment host industries that countries need to develop urgently. The processing of the screw is carried out on the screw grinder. The grinding wheel installed on the screw grinder is ground by high-speed rotation to process the thread of the screw. The formed grinding wheel meets the processing needs to ensure the parameters such as the angle, thickness and concentricity of the grinding wheel, so as to ensure the processing quality of the screw.

At present, due to the lack of on-machine dressing technology for grinding wheels, offline dressing is generally used in the prior art. There are two problems in this method. One is that the disassembly and assembly of the grinding wheel will cause multiple positioning and affect the positioning accuracy of the grinding wheel, thereby affecting the machining accuracy of the workpiece. ; The second is that as the number of times of grinding wheel dressing increases, the processing cycle will be extended, thereby affecting the processing efficiency.

In order to solve the above problems, it is necessary to integrate a set of grinding wheel on-line dressing device on the existing screw grinder, and directly feed back the measurement results of the workpiece to the grinding wheel dressing program of the machine tool to complete the dressing of the grinding wheel on the machine. This device greatly improves the machine tool. The processing efficiency and precision avoid repeated positioning errors after grinding wheel dressing.

Contents of the invention

In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a screw grinding device with online dressing of grinding wheels. The measurement results are fed back to the grinding wheel dressing device of the machine tool to complete the on-machine dressing of the grinding wheel. This device greatly improves the machining efficiency and accuracy of the machine tool and avoids repeated positioning errors after the grinding wheel is dressed.

The screw grinding device of the present invention, which can be dressed online, comprises a screw workbench for installing the screw and driving the screw to rotate around the axis, and a grinding wheel frame which is arranged on one lateral side of the screw workbench and can move horizontally along the radial direction of the screw . A rotary table mounted on the grinding wheel frame in a manner that can slide vertically and rotate around the horizontal direction, and a grinding wheel and a dresser that are simultaneously installed on the rotary table;

Further, the table top of the rotary table is located in a vertical plane, the axis of the grinding wheel is parallel to the table top and a grinding wheel driving motor for driving the grinding wheel to rotate axially is installed on the table;

Further, the dresser includes two coaxially fixed grinding wheel dressing discs whose axes are parallel to the axis of the grinding wheel. Taiwan cooperation;

Further, the rotary table is also provided with a drive motor for the grinding wheel dressing disc, an axial adjustment motor for the grinding wheel dressing disc, and a radial adjustment motor for the grinding wheel dressing disc, and the axial adjustment motor for the grinding wheel dressing disc and the radial adjustment motor for the grinding wheel dressing disc The grinding wheel dressing disc is driven to reciprocate and slide along its axial and radial directions through the screw nut mechanism respectively;

The screw grinding device in which the grinding wheel can be trimmed on-line according to the present invention also includes a T-shaped bed, and the T-shaped bed is provided with a longitudinal slide rail and a transverse slide rail arranged along the horizontal direction and perpendicular to each other; the longitudinal slide rail and the transverse slide rail The slide rails are respectively used for sliding cooperation with the screw table and the grinding wheel frame;

Further, the grinding wheel head is provided with a vertical slide rail along the vertical direction and is fitted with a vertical slide block through the vertical slide rail, and the rotary table is rotatably mounted on the vertical slide block;

The screw grinding device with online trimming of the grinding wheel of the present invention further includes a turntable drive motor for driving the rotary table to rotate, and the turntable drive motor drives the rotary table to rotate through a worm and worm gear mechanism;

Further, the grinding wheel drive motor drives the grinding wheel to rotate around the axis through belt transmission;

Further, it also includes a detection device for measuring the size of the screw rod and a processor capable of receiving detection data from the measurement device and controlling the dresser to dress the grinding wheel.

The beneficial effect of the present invention is: the grinding wheel of the present invention can be repaired on-line screw grinding device, the screw to be processed is installed on the screw workbench, and is driven by the screw workbench to rotate, the grinding wheel frame is arranged on one side of the screw workbench and can Move horizontally along the radial direction of the screw to realize the radial feed of the grinding wheel and the grinding compensation of the grinding wheel. The grinding wheel is installed on the rotary table, and the vertical sliding of the rotary table ensures that the geometric center of the grinding wheel and the axis of the screw to be processed are always in the same horizontal plane , the rotation of the rotary table on the vertical plane can adjust the installation angle of the grinding wheel, and the rotation of the grinding wheel around its axis can realize the grinding of the screw; the dresser of the present invention is on the rotary table together with the grinding wheel, so When the grinding wheel is fed, vertically translated, and the installation angle is adjusted, the relative position of the dresser and the grinding wheel remains unchanged, so the grinding wheel can rotate at any angle in the vertical plane, and can stay at any angle for dressing to achieve For the on-machine dressing of the grinding wheel, the grinding device of the present invention greatly improves the processing efficiency and precision of the screw rod, and avoids errors caused by repeated positioning of the grinding wheel after dressing.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the transmission structure of the trimmer of the present invention.

detailed description

Fig. 1 is a schematic structural view of the present invention, as shown in the figure, the screw grinding device that the emery wheel 4 of the present embodiment can be trimmed on-line includes a screw workbench 3 for installing a screw and driving the screw to rotate around the axis, arranged on the Screw workbench 3 lateral sides and 4 grinding wheel frames that can move horizontally along the radial direction of the screw rod, the rotary table 7 installed on the 4 grinding wheel frames in a manner that can slide vertically and rotate around the horizontal direction, and simultaneously install On the grinding wheel 4 and the dresser 5 of the rotary table 7, the screw to be processed is installed on the screw table 3, and is driven by the screw table 3 to rotate (A axis), and the 4 grinding wheels are arranged on the screw table 3- side and can move horizontally along the radial direction of the screw (Y axis) to realize the radial feed of the grinding wheel 4 and the grinding compensation of the grinding wheel 4. The grinding wheel 4 is installed on the rotary table 7, and the vertical sliding of the rotary table 7 (Z axis ) to ensure that the geometric center of the grinding wheel 4 and the axis of the screw to be processed are always on the same horizontal plane, the rotation (B axis) of the rotary table 7 in the vertical plane can adjust the installation angle of the grinding wheel 4, and the rotation of the grinding wheel 4 around its axis ( N axis) can realize the grinding process to screw rod; Dresser 5 of the present invention is on rotary table 7 together with emery wheel 4, so emery wheel 4 when feed motion, vertical translation and installation angle adjustment take place, dresser 5 and the relative position of the grinding wheel 4 remain unchanged, so the grinding wheel 4 can rotate at any angle in the vertical plane, and can stay at any angle for dressing, so as to realize the on-machine dressing of the grinding wheel 4. The grinding device of the present invention is extremely The machining efficiency and precision of the screw are greatly improved, and errors caused by repeated positioning of the grinding wheel 4 after dressing are avoided.

In the present embodiment, the table top of the rotary table 7 is located in a vertical plane, and the rotating shaft (axis B) of the rotary table 7 passes through the geometric center of the grinding wheel 4, so the processing of workpieces with different helix angles can be realized. The axis of the emery wheel 4 is parallel to the table top of the rotary table 7 and the emery wheel drive motor 14 for driving the emery wheel 4 to rotate around the axial direction (N axis) is installed on this table, utilize the emery wheel drive motor 14 to drive the emery wheel 4 to rotate, simultaneously, because the emery wheel The axis of 4 is parallel to the table top of rotary table 7, so as to ensure that the axis of grinding wheel 4 is always in the vertical plane.

In this embodiment, the dresser 5 includes two coaxially fixed grinding wheel dressing discs 10 whose axes are parallel to the axis of the grinding wheel 4, wherein the grinding wheel dressing disc 10 is a disc body whose hardness is higher than that of the grinding wheel 4 to be dressed. Usually, a diamond grinding wheel 4 is used as the dresser 5 of the grinding wheel 4, and the two grinding wheel dressing discs 10 cooperate with the rotary table 7 in a reciprocating sliding manner along its axial and radial directions, and the dresser 5 moves along the axial direction of the grinding wheel 4. (U-axis) and dresser 5 perpendicular to the axial movement of grinding wheel 4 (V-axis) form a two-linkage system. Dresser 5 is slid on the rotary table 7 and ensures that the end face of the dresser 5 diamond dressing wheel is always parallel to the grinding wheel 4. The end face realizes the dressing movement of the dresser 5 on the in-situ complex profile of the grinding wheel 4. The dressing of the grinding wheel 4 can be divided into two steps: shaping and sharpening. The shaping is to make the grinding wheel 4 meet the required geometric shape and size accuracy, and make the tip of the abrasive grains finely broken to form a sharp grinding edge; sharpening is to remove the bond between the abrasive grains of the grinding wheel 4, so that the abrasive grains protrude from the surface of the bond, forming the necessary chip space, so that The grinding wheel 4 has the best grinding ability. The shaping and sharpening of the ordinary grinding wheel 4 are usually carried out uniformly or at the same time. The combination is collectively called dressing, while the shaping and sharpening of the superhard grinding wheel 4 such as the CBN grinding wheel 4 can be done according to the specific situation. Simultaneously, it can also be carried out step by step. In this embodiment, a diamond dressing wheel is used as a dressing tool to complete the shaping and sharpening of the grinding wheel 4 at the same time.

In this embodiment, the rotary table 7 is also provided with a grinding wheel dressing disc drive motor 11, a grinding wheel dressing disc axial adjustment motor 13 and a grinding wheel dressing disc radial adjustment motor 15, and the grinding wheel dressing disc axial adjustment motor 13 And the radial adjustment motor 15 of the grinding wheel dressing disc drives the grinding wheel dressing disc 10 to reciprocate and slide along its axial direction (V direction) and radial direction (U direction) through the screw nut mechanism 12 respectively. In this embodiment, the right grinding wheel dressing disc 10 is used for dressing The right side profile of the grinding wheel 4 and the left side grinding wheel dressing disc 10 are used to dress the left side profile of the grinding wheel 4 separately. During work, the grinding wheel dressing disc 10 and the grinding wheel 4 of the grinding wheel 4 dresser 5 are respectively driven by their respective feed motors. The installation sliding seat of the grinding wheel 4 dresser 5 is fixedly installed on the rotary table of the grinding wheel 4 head frame, and the dressing wheel parallel axis dressing method is adopted, the grinding wheel dressing disc 10 adjusts the motor 13 and the grinding wheel dressing disc diameter in the axial direction of the grinding wheel dressing disc Driven by the adjusting motor 15, the linear feeding motion of the grinding wheel dressing disc 10 along the radial direction (V direction) and the axial direction (U direction) of the grinding wheel 4 is realized through the lead screw transmission, and the trimming of the grinding wheel 4 is completed.

The grinding device of this embodiment also includes a T-shaped bed 1, which is provided with a longitudinal slide rail 2 (X direction) and a transverse slide rail 9 (Y direction) arranged along the horizontal direction and perpendicular to each other. ; The longitudinal slide rail 2 and the transverse slide rail 9 are respectively used for sliding cooperation with the screw table 3 and the grinding wheel 4 frames.

In this embodiment, the grinding wheel 4 frame is provided with a vertical slide rail 8 (direction Z) along the vertical direction, and a vertical slide block is slidably fitted through the vertical slide rail 8, and the rotary table 7 is rotatably installed. on the vertical slider.

The grinding device of this embodiment also includes a turntable drive motor for driving the rotary table 7 to rotate, and the turntable drive motor drives the rotary table 7 to rotate through a worm and worm gear mechanism 16, wherein the turbine can be fixed or integrated Forming and rotary table 7, the deceleration ratio of the worm gear and worm is relatively large, which can realize the precise adjustment of the installation angle of the grinding wheel 4, and at the same time, the rotation of the rotary table 7 is locked by using the characteristic of unidirectional transmission of the worm gear and worm.

In this embodiment, the grinding wheel driving motor 14 drives the grinding wheel 4 to rotate around the axis through belt transmission.

The grinding device of this embodiment also includes a detection device for measuring the size of the screw and a processor that can receive the detection data of the measurement device and control the dresser 5 to dress the grinding wheel 4. In this embodiment, before the grinding wheel 4 is dressed, it is necessary The workpiece is detected first. This machine tool adopts the method of combining on-machine detection and error compensation. That is, when the workpiece size needs to be measured during the processing of the workpiece, the machine tool stops and the workpiece is not removed from the machine tool. The probe measurement system equipped with communication function detects the workpiece under the control of the measurement program according to the size and shape accuracy requirements of the workpiece to be measured, and the detection result data is transmitted to the processor for analysis and processing.

In this embodiment, the detection device is a three-coordinate measurement module for detecting screw parameters, and the processor can calculate the dressing amount of the grinding wheel 4 and control the dressing action of the grinding wheel 4 dresser 5 through the measured screw parameters, wherein , the three-coordinate measurement module is an existing three-coordinate measuring machine, and will not be repeated here. The three-coordinate measurement module can measure the profile, lead and other parameters of the processed screw in a non-contact manner and automatically measure the measurement data. Through identification and analysis, the amount of dressing required by the grinding wheel 4 is obtained, and the dressing program of the grinding wheel 4 is automatically generated to complete the online dressing of the grinding wheel 4.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (10)

1. A screw grinding device with on-line trimming of the grinding wheel, characterized in that: it includes a screw workbench for installing the screw and driving the screw to rotate around the axis, which is arranged on the lateral side of the screw workbench and can be positioned along the radial direction of the screw. A grinding wheel frame that moves horizontally, a rotary table mounted on the grinding wheel frame in a manner that can slide vertically and rotate around the horizontal direction, and a grinding wheel and a dresser installed on the rotary table at the same time. 2. The screw grinding device with online dressable grinding wheel according to claim 1, characterized in that: the table top of the rotary table is located in a vertical plane, and the rotating shaft of the rotary table passes through the geometric center of the grinding wheel, The axis of the grinding wheel is parallel to the table top of the rotary table and a grinding wheel drive motor for driving the grinding wheel to rotate around the axial direction is installed on the table. 3. The screw grinding device with online dressable grinding wheel according to claim 1, characterized in that: the dresser comprises two coaxially fixed grinding wheel dressing discs whose axes are parallel to the axis of the grinding wheel, and the two The grinding wheel dressing disc cooperates with the rotary table in a reciprocating and sliding manner along its axial and radial directions. 4. The screw grinding device with online dressable grinding wheel according to claim 1, characterized in that: the rotary table is also provided with a drive motor for the grinding wheel dressing disc, an axial adjustment motor for the grinding wheel dressing disc and a diameter of the grinding wheel dressing disc The axial adjustment motor of the grinding wheel dressing disc and the radial adjustment motor of the grinding wheel dressing disc respectively drive the grinding wheel dressing disc to reciprocate and slide along its axial and radial directions through a screw nut mechanism. 5. The screw grinding device with on-line trimming of grinding wheels according to claim 1, characterized in that: it also includes a T-shaped bed, and the T-shaped bed is provided with vertical slide rails and vertical rails arranged in the horizontal direction and perpendicular to each other Horizontal slide rail; the longitudinal slide rail and the horizontal slide rail are respectively used for sliding cooperation with the screw workbench and the grinding wheel frame. 6. The screw grinding device according to claim 1, wherein the grinding wheel can be trimmed online, wherein the grinding wheel frame is provided with a vertical slide rail along the vertical direction, and a vertical slide rail is slid through the vertical slide rail. block, and the rotary table is rotatably mounted on the vertical slider. 7. The screw grinding device according to claim 1, wherein the grinding wheel can be trimmed on-line, further comprising a turntable drive motor for driving the rotary table to rotate, and the turntable drive motor drives the rotary table through a worm and worm gear mechanism. The rotary table rotates. 8 . The screw grinding device with online dressing of the grinding wheel according to claim 7 , wherein the grinding wheel driving motor drives the grinding wheel to rotate around the axis through belt transmission. 9. The screw grinding device with online dressable grinding wheel according to claim 1, characterized in that: it also includes a detection device for measuring the size of the screw and a device that can receive the detection data of the measuring device and control the dresser to dress the grinding wheel processor. 10. The screw grinding device with online dressable grinding wheel according to claim 9, characterized in that: the detection device is a three-coordinate measurement module for detecting screw parameters, and the processor can pass the measured screw parameters Calculate the dressing amount of the grinding wheel and control the dressing action of the wheel dresser.