CN210849513U

CN210849513U - Grinding synchronous deburring mechanism suitable for high-precision servo valve core

Info

Publication number: CN210849513U
Application number: CN201921743510.2U
Authority: CN
Inventors: 李硕; 柴艳华; 兰宁; 张锐
Original assignee: Beijing No2 Machine Tool Works Co ltd
Current assignee: Beijing No2 Machine Tool Works Co ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-06-26
Anticipated expiration: 2029-10-17

Abstract

The utility model relates to a synchronous deburring mechanism of grinding suitable for high accuracy servovalve case, including the grinding machine body, the grinding machine body is equipped with the grinding carriage that is used for the cylindrical grinding, the grinding carriage is equipped with the main emery wheel that is used for the cylindrical grinding, be equipped with deburring mechanism on the headstock of grinding machine body, deburring mechanism includes balladeur train, vertical movement mechanism and rotary mechanism, the balladeur train with headstock longitudinal sliding cooperates and is equipped with balladeur train drive arrangement, vertical movement mechanism installs the right side of headstock, rotary mechanism installs on vertical movement mechanism's the slider, the attached bistrique is installed on the top of its rotating part, the attached bistrique adopts the ruby to repair the head. The utility model discloses a grinding machine realizes grinding excircle and burring simultaneously, has not only improved machining efficiency, but also is favorable to guaranteeing product quality's stability, reduces the rejection rate, is adapted to high accuracy servovalve case etc..

Description

Grinding synchronous deburring mechanism suitable for high-precision servo valve core

Technical Field

The utility model relates to the field of machining, specifically be a synchronous burring mechanism of grinding that is adapted to high accuracy servovalve case.

Background

The electro-hydraulic servo valve generally comprises a jet baffle or a partial guide jet flow and a slide valve pair matching part, and has the function of converting a weak electric signal into a high-power flow to be output, the axial matching relation between the working edge of a valve core and a throttling window of a valve sleeve generally requires that a right-angle sharp edge is kept free of burrs, and the tiny burrs on the working edge have important influence on the matching motion of the matching part. At present, an effective deburring machine is not available, and due to the fact that the machining precision requirement is high, if burrs are removed by using other grinding machines after outer circle grinding, the error range allowed by a workpiece can be exceeded due to errors of workpiece clamping, positioning and rotation of the grinding machines and the like, and the precision requirement of products is difficult to achieve due to grinding errors of two procedures. Therefore, at present, a manual grinding mode is still adopted, and the required processing precision is achieved by means of careful and careful attention and handcraft of an operator, however, the manual mode is extremely low in efficiency, and the throttling edge removal amount is manually controlled, so that the rejection rate is high; meanwhile, the precision of the machined surface is easily damaged by manual scraping, and the result of manual deburring is that the surface micro-morphology is poor, the effect of complete deburring cannot be realized, and the improvement of the product quality is restricted.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a synchronous burring mechanism of grinding that is adapted to high accuracy servovalve case to realize the mechanized operations of cylindrical grinding and burring, and accomplish in the process, both saved the process, can ensure stable product quality again.

The technical scheme of the utility model is that: the utility model provides a synchronous burring mechanism of grinding that is adapted to high accuracy servo valve case, includes the grinding machine body, the grinding machine body is equipped with the carriage that is used for the cylindrical grinding, the carriage is equipped with the main emery wheel that is used for the cylindrical grinding, be equipped with burring mechanism on the headstock of grinding machine body, burring mechanism includes balladeur train, vertical movement mechanism and rotary mechanism, the balladeur train with headstock longitudinal sliding fit is equipped with balladeur train drive arrangement, vertical movement mechanism installs the right side of headstock is equipped with the slider, the direction of motion perpendicular to of slider is vertical, rotary mechanism installs on vertical movement mechanism's the slider, be equipped with the rotating part, and the attached bistrique is installed on the top of its rotating part, the attached bistrique is located rotary mechanism's inboard is towards.

The sliding frame is positioned above the head frame, and a longitudinal guide limiting structure is arranged between the sliding frame and the head frame.

The guide limiting structure comprises two parallel longitudinally extending linear guide rails fixedly mounted at the top of the headstock, two linear sliding grooves matched with the linear guide rails are formed in the bottom surface of the sliding frame, and the upper parts of the linear guide rails are located in the corresponding linear sliding grooves and are in sliding fit with the linear guide rails.

The sliding frame driving device comprises a sliding frame driving motor and a lead screw pair used for transmission, the lead screw pair comprises a longitudinal lead screw and a lead screw nut matched with the lead screw, an output shaft of the sliding frame driving motor is in transmission connection with the lead screw, and the lead screw nut is fixedly connected with the sliding frame through a nut seat arranged on the sliding frame.

The left end and the right end of the lead screw are mounted on the headstock through bearings at corresponding ends, the end face of the right end of the carriage driving motor is a mounting face and is fixedly mounted on a bearing seat at the left end of the lead screw, and an adjusting pad is arranged between the bearing seats at the left end and the right end of the lead screw and the top face of the headstock or is not arranged between the bearing seats at the left end and the right end of the lead screw and the top.

The vertical moving mechanism adopts a sliding table cylinder, the sliding table cylinder is arranged in a mode that a sliding part faces to the right, and a cylinder axis of the sliding table cylinder is vertically intersected with a top connecting line of a headstock and a tailstock of the grinding machine body.

The cylinder body of the sliding table cylinder is obliquely arranged in a vertical plane perpendicular to the longitudinal direction, and the axis of the cylinder body is a non-vertical line.

The rotating mechanism is an electric rotating mechanism or a pneumatic rotating mechanism.

The auxiliary grinding head is a ruby finishing head.

The sliding table cylinder and the grinding wheel frame are respectively positioned on the front side and the rear side of a vertical plane passing through a top connecting line of a headstock and a tailstock of the grinding machine body.

The utility model has the advantages that: because the grinding carriage with the main grinding wheel and the deburring mechanism with the auxiliary grinding head are arranged on the same grinding machine, the external grinding and deburring can be realized on the same grinding machine, thereby avoiding the workload and clamping position errors caused by clamping workpieces twice on different grinding machines, simultaneously, the external grinding and deburring are finished in one process, the workpieces are kept to rotate in the original rotating mode after the external grinding is finished, and the deburring is ground (deburred), thereby avoiding the change of the rotation axis of the workpieces caused by two times of starting, because the external grinding and the deburring are based on the same rotating state, no reference error exists between the deburring and the external grinding no matter whether the clamping position of the workpieces on the grinding machine is in an ideal state, the technical effect similar to matched grinding is formed, the processing precision is ensured, and the mechanical operation is realized, not only improves the processing efficiency, but also is beneficial to ensuring the stability of the product quality and reducing the rejection rate.

The utility model discloses, be adapted to high accuracy products such as high accuracy servovalve case.

Drawings

Fig. 1 is a schematic front view of a deburring mechanism according to the present invention;

fig. 2 is a right-side structural schematic view of the deburring mechanism of the present invention;

fig. 3 is a schematic structural diagram of the present invention.

The labels in the figure are:

10, a fuselage; 20, a head frame; 21, the tip of the headstock; 23, a guide rail; 30, a tail frame; 31, the tip of the tailstock; 40, a carriage; 41, a carriage drive motor; 42, a coupling; 43, a bearing seat; 44, a bearing; 45, a lead screw; 47, a bearing seat; 50, a slipway cylinder; 59, a cylinder support; 60, a rotating mechanism; 61, a rotating member; 70, a workpiece; 80, a grinding wheel frame; 81, a main grinding wheel; and 90, an auxiliary grinding head.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1-3, the utility model provides a synchronous deburring mechanism of grinding that is adapted to high accuracy servovalve case, including the grinding machine body, the grinding machine body is equipped with the carriage 80 that is used for the cylindrical grinding (grinding), the carriage is equipped with the main emery wheel 81 that is used for the cylindrical grinding, be equipped with deburring mechanism on the headstock 20 of grinding machine body, deburring mechanism includes carriage 40, vertical movement mechanism 50 and rotary mechanism 60, the carriage with the headstock longitudinal sliding fit and be equipped with the carriage drive arrangement, vertical movement mechanism installs in the right side of headstock (nearly tailstock side), is equipped with slider (can be relative to the base of vertical movement mechanism or the gliding piece of fixed main part) 51, the direction of motion of slider is perpendicular to vertical, rotary mechanism installs on the slider of vertical movement mechanism, there is provided a rotary member (a member capable of rotating with respect to a base or a fixed main body portion of the rotary mechanism) 61, the tip of which is mounted an auxiliary grinding head (a deburring grinding head) 90, which is located on the inner side (the near-workpiece side) of the rotary mechanism, toward the workpiece 70.

The grinding machine body can adopt any existing grinding machine which can meet the corresponding cylindrical grinding requirement, and the machine body 10, the headstock 20, the tailstock 30, the grinding carriage 80 and the like can all adopt the prior art. For current grinding machine, the utility model discloses a synchronous deburring mechanism of grinding has increased one set of deburring mechanism that can realize attached bistrique formation motion on the headstock of grinding machine (grinding machine body), so as to realize cylindrical grinding and no burr operation on same grinding machine, top 21 with headstock and tailstock of grinding machine body, 31 realize the centre gripping of work piece, location and rotation etc. with deburring mechanism will attach the bistrique and move the grinding position of burring and rotate, get rid of the burr from this, can realize cylindrical grinding and burring grinding under process or one operation one, grind good relevant excircle back, the grinding machine is incessant, the work piece continues to keep rotatory, operation deburring mechanism will attach the bistrique and move the burring position and grind the burr, in order to get rid of the burr.

The carriage may be generally located above the head frame to avoid interference with other components, which facilitates the placement of a moving platform or rail.

A longitudinal guide stop structure is typically provided between the carriage and the head for guiding longitudinal movement and limiting other movements, and may be any suitable known technique, such as cooperating dovetail and trapezoidal guides commonly used on machine tools.

The guide rail and the sliding groove which are matched with each other can be fixedly arranged on the top surface of the headstock, the other fixing device is arranged on the bottom surface of the sliding frame, and the sliding guide and the limiting of the sliding frame and the headstock are realized through the sliding matching of the guide rail and the sliding groove.

The number of the guide rails and the chutes which are matched with each other can be two, so that the stability is facilitated.

For example, the guide limit structure may include two parallel longitudinally extending linear rails 23 fixedly mounted on the top of the head frame, the bottom surface of the carriage is provided with two linear sliding grooves (a strip member provided with a linear groove cooperating with a linear rail) cooperating with the linear rails, and the upper portion (main body portion) of the linear rail is located in the corresponding groove of the linear sliding groove, and is in sliding fit (movable connection manner allowing relative sliding).

The carriage driving device may include a carriage driving motor 41 and a screw pair for transmission, the screw pair includes a longitudinal screw 45 and a screw nut engaged with the screw, the carriage driving motor may be a servo motor, and may be generally located on the left side (away from the tailstock side) of the screw for convenient arrangement, an output shaft thereof is coaxially connected to an end portion (e.g., the left end or the end away from the tailstock) of the screw through a coupling 42, or may be other transmission connection manners, such as a transmission connection manner engaged with a gear, of the screw nut, and the screw nut is fixedly connected to the carriage through a nut seat provided on the carriage, so that the carriage driving motor can drive the carriage to move longitudinally through the screw pair.

The left end and the right end of the lead screw are installed on the headstock through bearings at corresponding ends, the end face of the right end of the carriage driving motor is an installation face and is fixedly installed on a bearing seat 43 at the left end of the lead screw, and adjusting pads are arranged or not arranged between the

bearing seats

43 and 47 at the left end and the right end of the lead screw and the top face of the headstock.

The screw is preferably a ball screw, two ends of the ball screw are fixedly supported by two sets of bearings 44, and the two sets of bearings are respectively installed on corresponding bearing seats.

The ball screw is provided with a thread section matched with the screw nut, the diameter of the thread section can be larger than that of the rest part of the screw, and the screw nut is rotationally connected with the thread section of the ball screw.

And the bearing used for mounting the lead screw adopts a high-precision angle contact bearing so as to ensure the mounting precision of the lead screw.

An adjusting pad is arranged between the nut seat and the sliding frame or not.

The vertical movement mechanism 50 is a mechanism in which the slider 51 is linearly movable with respect to the base or the main body portion thereof, and can drive the slider to perform a desired sliding (linear movement) by its own drive mechanism or a drive system provided (for example, a cylinder, a motor, a transmission mechanism thereof, and the like for corresponding driving).

The carriage may be provided with vertical plates 59 as supports for the vertical movement mechanism to extend the vertical fit span for fixation or stability.

The vertical movement mechanism preferably adopts a sliding table cylinder, the sliding table cylinder is a rodless cylinder and is provided with a sliding table (or called sliding block, namely sliding part) which can be driven by a piston to do linear motion along the axial direction of the cylinder body, the operation and control precision of the sliding table cylinder is high, and the rotating mechanism is convenient to install and fix.

The sliding table cylinder is preferably arranged in a mode that the sliding part faces the right (towards the direction of the tailstock), and a cylinder axis (or an axial extension line) of the sliding table cylinder is vertically intersected with a connecting line (a straight line connecting the headstock center and the tailstock center) of the headstock and the tailstock of the grinding machine body.

The cylinder body (the axis of the cylinder body) of the sliding table cylinder is preferably arranged in a vertical plane in a tilting mode, the axis of the cylinder body is a non-vertical line (a line which is not perpendicular to the horizontal plane) so as to facilitate operation and observation, and meanwhile the deburring mechanism and the grinding wheel frame can be located on the front side and the rear side of a workpiece respectively and can be contacted with and ground the workpiece simultaneously.

The deburring mechanism and the grinding wheel frame are respectively positioned on the front side and the rear side of a vertical plane (a plane perpendicular to a horizontal plane) passing through a top connecting line of the headstock and the tailstock of the grinding machine body, so that the front side and the rear side of the main grinding wheel and the front side and the rear side of the auxiliary grinding wheel are allowed to be in contact with a workpiece or grind the workpiece, mutual interference is avoided, the main grinding wheel and the auxiliary grinding wheel are allowed to operate simultaneously, efficiency is improved, and meanwhile, machining precision is guaranteed.

The rotating mechanism 60 is a mechanism whose rotating member can rotate relative to its base or main body portion, and can drive the rotating member to rotate as required by its own driving mechanism or a driving system (for example, a cylinder, a motor, a transmission mechanism thereof, and the like for corresponding driving), and is an electric rotating mechanism when the driving power is derived from electric energy, and is a pneumatic rotating mechanism when the driving power is derived from gas pressure.

For example, a servo motor may be used, an output shaft of which may be used as an optional component, and the auxiliary grinding head is fixedly mounted on an output shaft (motor shaft) of the motor or an output shaft of a transmission mechanism driven by the output shaft of the motor, so that the auxiliary grinding head is rotated by the motor.

The accessory grinding head 90 is preferably a ruby finishing head.

The ruby dressing head may take the form of a curved surface of revolution having an axis coincident with (co-linear with) the axis of rotation of the rotating member, thereby achieving the desired rotation during the deburring grinding process.

The ruby finishing head is equipped with multiple model, ruby finishing head with rotary mechanism is connected through the mode of making things convenient for the dismouting to conveniently process different work pieces.

The operation control can be performed according to the prior art, for example, by using the control technology of the existing grinding machine and the automatic machine tool, for example, the NC control system, so as to control the coordination operation of the parts of the machine.

When the machine tool is in a non-working state, the sliding table air cylinder is always positioned at the upper position, the sliding frame is retracted to the original position (the initial or waiting position close to the left), and the whole deburring mechanism is positioned above the headstock, so that the preparation and measurement before the grinding of the machine tool are ensured to be free from influencing other operations.

When the deburring grinding is carried out, the sliding frame driving motor moves towards the right side, when the sliding frame moves to the longitudinal position of deburring, the sliding part of the sliding table cylinder drives the rotating mechanism to descend, meanwhile, the rotating mechanism drives the ruby trimming head to rotate at a certain speed, and the ruby trimming head is contacted with the burr part to grind the burr, but the workpiece is not ground.

When the same workpiece needs to be deburred in multiple places, the ruby trimming head can be lifted after one deburring place is completed, the sliding frame is longitudinally moved to the next deburring position, then the ruby trimming head is moved downwards to be in contact with the new deburring position, burrs at the new position are removed, and the steps are repeated until all deburring operations are completed.

The outer circle grinding and the burr removal can be carried out alternately, after the main grinding wheel grinds one outer circle, the deburring mechanism controls the ruby trimming head to complete deburring operation related to the outer circle, the main grinding wheel is controlled by the grinding carriage to carry out outer circle grinding on the other part, the grinding carriage returns to the original position (initial or waiting position) after the outer circle grinding is completed, and the deburring mechanism controls the ruby trimming head to carry out deburring grinding related to the outer circle.

In the whole process of grinding and deburring the excircle, the workpiece preferably does not stop rotating and keeps a stable and consistent rotating mode, so that the phenomenon that the axes of two rotations of the workpiece are different due to gaps or errors of a workpiece rotating driving device and a corresponding transmission mechanism and the like, the reference of grinding the excircle is inconsistent with that of deburring, and the product quality is influenced is avoided.

The machining mode or sequence may be determined according to the design requirements of the actual workpiece. For example, the following work order may be followed: the method comprises the steps of firstly performing match grinding on the excircle of a workpiece, then performing match grinding on the axial size, then grinding the end face of the workpiece, and simultaneously performing accurate chamfering (deburring) on the sharp angle of the workpiece while keeping the sharp angle of the oil sealing edge of the workpiece, wherein the numerical value of the workpiece chamfering is less than 0.005 mm. The utility model discloses can effectively solve former man-hour and do not have accurate control to lead to the problem that the rejection rate is high.

The utility model relates to a burr be or mainly be the burr that the excircle grinding produced in excircle edge department.

In the present specification, the left and right are used to indicate the relative positional relationship of the related members or structures in the longitudinal direction, and are not used to limit the left and right in the actual implementation, and the front and back are used to indicate the relative positional relationship of the related members or structures in the horizontal and lateral directions, and are not used to limit the front and back in the actual implementation.

The preferred and optional technical means disclosed in the present invention can be combined arbitrarily to form a plurality of different technical solutions, except for the specific description and the further limitation that one preferred or optional technical means is another technical means.

Claims

1. The utility model provides a synchronous burring mechanism of grinding that is adapted to high accuracy servovalve case, includes the grinding machine body, the grinding machine body is equipped with the carriage that is used for the cylindrical grinding, the carriage is equipped with the main emery wheel that is used for the cylindrical grinding, its characterized in that be equipped with burring mechanism on the headstock of grinding machine body, burring mechanism includes balladeur train, vertical movement mechanism and rotary mechanism, the balladeur train with headstock longitudinal sliding cooperation is equipped with balladeur train drive arrangement, vertical movement mechanism installs the right side of headstock is equipped with the slider, the direction of motion perpendicular to of slider is vertical, rotary mechanism installs on vertical movement mechanism's the slider, be equipped with the rotating part, the attached bistrique is installed on the top of its rotating part, the attached bistrique is located rotary mechanism's inboard, towards.

2. The mechanism of claim 1, wherein said carriage is positioned above said head and a longitudinal guide stop is provided between said head and said carriage.

3. The mechanism according to claim 2, wherein said guide and stop structure comprises two parallel longitudinally extending linear guide rails fixedly mounted on the top of said headstock, said carriage having a bottom surface provided with two linear slide grooves for engaging said linear guide rails, said linear guide rails having upper portions thereof disposed within said respective linear slide grooves in sliding engagement therewith.

4. The mechanism according to claim 2, wherein the carriage driving device comprises a carriage driving motor and a screw pair for transmission, the screw pair comprises a longitudinal screw and a screw nut engaged with the screw, an output shaft of the carriage driving motor is in transmission connection with the screw, and the screw nut is fixedly connected with the carriage through a nut seat arranged on the carriage.

5. The mechanism of claim 4, wherein the left and right ends of the lead screw are mounted on the head frame through bearings at the corresponding ends, the right end face of the carriage driving motor is a mounting face and is fixedly mounted on a bearing seat at the left end of the lead screw, and an adjusting pad is provided or not provided between the bearing seat at the left and right ends of the lead screw and the top face of the head frame.

6. The mechanism of claim 1, characterized in that the vertical moving mechanism adopts a sliding table cylinder, the sliding table cylinder is arranged in a manner that a sliding part faces to the right, and a cylinder body axis of the sliding table cylinder is vertically intersected with a top connecting line of a headstock and a tailstock of the grinding machine body.

7. The mechanism of claim 6, wherein the cylinder body of the slide table cylinder is disposed obliquely in a plane perpendicular to the longitudinal direction, and an axis of the cylinder body is a non-vertical line.

8. The mechanism of claim 1, wherein the rotation mechanism is an electric rotation mechanism or a pneumatic rotation mechanism.

9. The mechanism of claim 1, wherein said accessory grinding head is a ruby finishing head.

10. The mechanism according to any one of claims 1 to 9, characterized in that the deburring mechanism and the wheel head are respectively located on the front and rear sides of a vertical plane passing through a connecting line of apexes of the head stock and the tail stock of the grinding machine body.