CN105150104B - A kind of centreless grinding wheel trimming device and method - Google Patents

Abstract

The present invention is a kind of centreless grinding wheel trimming device and method for the apparatus and method for belonging to amendment forming grinding wheel surface, and its device is used to repair centreless grinding wheel, and its method is used to be repaired using the device.Its device takes the fixed trimming device worked respectively installed on X-axis slide unit and the formula of falling lift trimming device to install fixed dressing tool or rotating trim instrument, rotary drive mechanism driving rotating trim instrument rotation, the driving of Dao Tai mechanisms is hinged on X-axis slide unit and falls to lift the technical scheme that dressing tool installing component is swung, the technical problem that the finishing of complicated shape centreless grinding wheel is required can not be met by solving existing a set of dressing tool, the inventive method is taken the dressing tool installed using fixed trimming device to carry out rapid strong finishing and/or uses the dressing tool of the formula of falling lift trimming device installation to carry out the technical scheme of low speed precise dressing, solve the problems, such as finishing operation of the apparatus of the present invention to complicated shape abrasive grinding wheel.

Description

A centerless grinding wheel dressing device and method

technical field

The invention belongs to a device and a method for correcting the surface of a forming grinding wheel, in particular to a centerless grinding wheel dressing device and method.

Background technique

The grinding wheel of centerless grinding is a high-speed rotating body. Its surface shape determines the surface shape of the centerless grinding workpiece, and its surface quality determines the surface quality of the centerless grinding workpiece. In centerless grinding, the surface shape and surface quality of the roasted grinding wheel cannot meet the requirements of grinding processing, and must be trimmed to make the surface shape and surface quality of the grinding wheel meet the requirements of grinding processing. After replacing the grinding wheel, it is first necessary to perform rapid and powerful dressing to achieve the purpose of rapid prototyping. The grinding wheel that has been quickly and powerfully dressed also needs to be finely dressed at a low speed to meet the requirements for the surface shape and surface quality of the grinding wheel; During the grinding of the grinding wheel, the surface of the tiny abrasive will be worn and passivated, and part of the abrasive will fall off from the surface of the grinding wheel, resulting in changes in the surface shape and surface quality of the grinding wheel. Therefore, low-speed precision dressing is also required to make the tiny abrasive The surface of the grinding wheel remains sharp and restores the surface shape and surface quality of the grinding wheel. Chinese Utility Model Patent, Authorized Notice No. CN 204339561 U "Centreless Grinder Grinding Wheel Dressing Device" discloses that a dressing device upper seat is arranged on the top of the dressing device slide plate, a slide plate lower seat is arranged at the bottom of the dressing device slide plate, and a diamond fixing seat is inserted in the dressing device upper seat. The technical scheme of the dressing device of the grinding wheel of the centerless grinder. The grinding wheel dressing device for the centerless grinding machine disclosed in the above-mentioned patent is the same as the existing grinding wheel dressing device for the centerless grinding machine. It is a dressing tool with only one set of grinding wheels fixedly installed. However, a set of dressing tools cannot not only complete fast and powerful dressing, but also complete low-speed dressing. Precision trimming, the result is either low trimming efficiency or low trimming accuracy. And for the centerless grinding wheel that has complex shape surface, for example has the surface such as straight line, curve, circular arc simultaneously, existing centerless grinding wheel dressing device can't satisfy dressing requirement. Different dressing tools have different positioning benchmarks. Frequent replacement and installation of dressing tools reduces production efficiency and is easy to damage the dressing tools. To replace, resulting in the accuracy and efficiency of the workpiece processing are difficult to guarantee. Abrasive is a very hard material. Although the dressing tool is made of superhard material, after repeated dressing, especially fast and strong dressing, the dressing tool wears seriously, so it is necessary to frequently dress the dressing tool. During the dressing process, the dressing tools are worn and worn out, so using a set of dressing tools for both fast and powerful dressing and low-speed precision dressing is not worth the loss in terms of dressing accuracy and economy.

Contents of the invention

The present invention solves the problem that the existing centerless grinding machine is only equipped with a set of dressing tools, which cannot not only complete fast and powerful dressing, but also can complete low-speed precision dressing; cannot meet the dressing requirements of centerless grinding wheels with complex-shaped surfaces; frequent replacement, installation and dressing Tools, technical problems that affect production efficiency and easily damage dressing tools, provide a centerless grinding wheel that is suitable for fast powerful dressing and low-speed precision dressing, and can dress complex surfaces, economical, efficient and low consumption A centerless grinding wheel dressing device and a centerless grinding wheel dressing method using the grinding wheel dressing device are simple in operation, smooth in connection and high in dressing accuracy.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a centerless grinding wheel dressing device, including a Y-axis slide table installed on the centerless grinding machine base, an X-axis slide table installed on the Y-axis slide table, and a dressing device The driving power drives the Y-axis sliding table to move along the Y-axis parallel to the axis of the grinding wheel, and the dressing device drives the X-axis sliding table to move along the X-axis perpendicular to the Y-axis. The X-axis sliding table is installed with a fixed There are two sets of dressing devices, the dressing device and the inverted dressing device; the dressing tool installed in the fixed dressing device is a fixed dressing tool or a rotating dressing tool; the dressing tool installed in the inverted dressing device is a rotating dressing tool or a fixed dressing tool; the rotating drive The mechanism drives the rotary dressing tool to rotate around the Y axis; the inverted dressing tool installation part of the inverted dressing device is hinged on the X-axis slide table, and the inverted lifting mechanism of the inverted dressing device drives the inverted dressing tool installation part to rotate around the hinged The axis of the pin shaft swings, and when the mounting part of the dressing tool is lifted up, the distance between the dressing tool installed on the inverted dressing device and the grinding wheel is greater than the distance between the dressing tool installed on the fixed dressing device and the grinding wheel. Grinding processing depth, when the installation part of the dressing tool is inverted, the distance between the dressing tool installed on the fixed dressing device and the grinding wheel is greater than the distance between the dressing tool installed on the inverted dressing device and the grinding wheel. The grinding processing depth; the driving power of the dressing device, the driving power of the rotating driving mechanism and the driving power of the lifting mechanism are connected to the control system.

In the present invention, the direction parallel to the axis of the grinding wheel is the Y axis, the direction perpendicular to the Y axis is the X axis, and the Z axis is perpendicular to the plane formed by the X axis and the Y axis. The dressing tool moves in the X-axis direction with the X-axis slide table moving alone or in the Y-axis direction with the Y-axis slide table moving alone or in compound movement with the X-axis slide table and Y-axis slide table moving simultaneously. The axis of the dressing tool installed on the fixed dressing device does not change in the Z-axis direction, the dressing tool installed on the upside-down dressing device is installed on the mounting part of the upside-down dressing tool, and the axis of the dressing tool installed on the upside-down dressing device follows the The swing of the mounting part of the trimming tool is lifted upside down and swings. One-pass fast powerful dressing means that the dressing tool installed on the fixed dressing device has ground the surface of the grinding wheel once, and the grinding depth of one-pass fast powerful dressing refers to the depth of the dressing tool that goes deep into the grinding wheel surface during one-pass fast powerful dressing Depth; one-pass low-speed precision dressing means that the dressing tool installed on the inverted dressing device has ground the surface of the grinding wheel once, and the grinding depth of one-pass low-speed precision dressing refers to the deep grinding of the dressing tool during one-pass low-speed precision dressing The depth of the grinding wheel surface. Usually, the grinding depth of one pass of fast powerful dressing is much greater than the grinding depth of one pass of low-speed fine dressing. When the grinding wheel is fast and powerfully dressed, the dressing tool installed on the fixed dressing device contacts the grinding wheel, and the dressing tool installed on the inverted dressing device is separated from the grinding wheel; when the grinding wheel is finely dressed at low speed, the fixed dressing device is installed The dressing tool is separated from the grinding wheel, and the dressing tool installed in the inverted dressing device contacts the grinding wheel; the fixed dressing device and the inverted dressing device work separately, and cannot dress the grinding wheel at the same time. There are many structures in the prior art to realize the driving power of the dressing device to drive the Y-axis sliding table to move along the Y-axis and to drive the X-axis sliding table to move along the X-axis, such as the gear and the rack driven by a motor cooperate with each other. There are many structures in the prior art to realize that the rotary driving mechanism drives the rotary dressing tool to rotate around the Y axis, for example, a motor is driven through a gear and so on. There are many structures in the prior art to realize the driving power of the lifting mechanism to drive the mounting part of the lifting trimming tool to swing around the axis of the pin shaft, for example, the driving gear connected to the motor meshes with the gear fixedly installed on the mounting part of the trimming tool and so on. Dressing tools installed on fixed dressing devices, such as diamond knives and diamond strips, etc., complete fast and powerful dressing of the grinding wheel with a large amount of grinding and large feed; dressing tools installed on inverted dressing devices, such as diamond Pen and diamond roller, etc., to complete the low-speed precision dressing of the grinding wheel with a small amount of grinding and a small amount of feed. Two sets of dressing devices can be used together to dress centerless grinding wheels with complex shapes, which expands the dressing methods and scope of centerless grinding grinding wheels, avoids frequent replacement and installation of dressing tools, affects production efficiency and easily damages dressing tools The phenomenon has the advantages of economy, high efficiency and low consumption. The control system controls the X-axis sliding table, the Y-axis sliding table, the dressing tool installed on the fixed dressing device, the dressing tool installed on the inverted dressing device and the grinding wheel to work in coordination.

When the dressing tool installed on the inverted dressing device is working, the axis of the dressing tool installed on the inverted dressing device, the axis of the dressing tool installed on the fixed dressing device and the axis of the grinding wheel are on the same plane.

The fixed dressing tool installed in the fixed dressing device is fixed on the fixed dressing tool mounting seat of the fixed dressing device, facing the grinding wheel, its axis is perpendicular to the axis of the grinding wheel, and both are on the same plane. The mounting part of the upside-down dressing tool is in a lifted state. Driven by the X-axis sliding table and the Y-axis sliding table, the fixed dressing tool installed on the fixed dressing device performs fast and strong dressing on the grinding wheel.

The rotary dressing tool installed in the fixed dressing device is installed in the notch of the rotary dressing tool installation groove of the fixed dressing device, and the opening of the notch faces the grinding wheel, and the axis of the rotating dressing tool installed in the fixed dressing device and the axis of the grinding wheel parallel. The mounting part of the upside-down dressing tool is in a lifted state. Driven by the X-axis sliding table and the Y-axis sliding table, the rotating dressing tool installed on the fixed dressing device performs fast and powerful dressing on the grinding wheel.

The fixed dressing tool installed on the inverted dressing device is fixedly installed on the fixed dressing tool mounting seat of the inverted dressing tool installation part, and the fixed dressing tool installed on the inverted dressing device faces the grinding wheel, and is lifted upside down. The lower part of the dressing tool installation part close to the grinding wheel is hinged with the X-axis slide table, and the adjustable positioning block is installed on the X-axis slide table under this side; the driving rod of the lifting mechanism pushes the wedge-shaped push block, and the wedge-shaped push One side fits with the inclined surface of the lower part of the upside-down dressing tool installation part, and the other side of the wedge-shaped push block slides and fits with the X-axis slide table. The center of gravity is biased to the opposite side of the upside-down dressing tool mounting part. Lift one side of the dressing tool installation part close to the grinding wheel, and lift the other side of the dressing tool installation part away from the grinding wheel. The lower bottom slope of the dressing tool installation part is closer to the grinding wheel and slides with the X axis. The distance between the stations is smaller. The driving power of the lifting mechanism drives the driving rod to reciprocate, and the driving rod pushes the wedge-shaped push block into or out of the inclined space of the lower bottom surface of the mounting part of the lifting finishing tool. The wedge-shaped push block exits, and under the action of gravity, the mounting part of the upside-down dressing tool is in a lifted state, and the axis of the fixed dressing tool installed on it is lifted; as the wedge-shaped push block gradually penetrates into the upside-down dressing tool mounting part In the inclined space of the lower bottom surface, the installation part of the upside-down dressing tool will gradually fall to the side where the fixed dressing tool is installed, and the axis of the fixed dressing tool installed by the upside-down dressing device will gradually fall down, and the installation part of the upside-down dressing tool will contact the adjustable positioning block , stop swinging. At this time, the axis of the fixed dressing tool installed on the inverted dressing device, the axis of the dressing tool installed on the fixed dressing device and the axis of the grinding wheel are on the same plane. Driven by the sliding table, the fixed dressing tool installed on the inverted dressing device performs low-speed precision dressing on the grinding wheel. The adjustable positioning block makes the installation part of the upside-down dressing tool stop swinging at the same position accurately every time, and the fixed dressing tool installed on the upside-down dressing device will not move during the low-speed precision dressing process. Adjust the adjustable positioning block, change the swing angle of the installation part of the upside-down finishing tool, and control the size of the fixing tool installed on the upside-down finishing device protruding from the finishing tool installed on the fixed finishing device. The inclined surface of the wedge-shaped push block of the inverted lifting mechanism cooperates with the inclined surface of the bottom surface of the lower part of the inverted lifting finishing tool installation part, which eliminates the possible fit gap in the inverted lifting mechanism of other structures. Restricted positioning, upside-down trimming tool installation parts are stable, and the work is reliable, so that the trimming accuracy is guaranteed to the greatest extent. Due to the effect of the inclined plane, the thrust of the driving force of the lifting mechanism is greatly increased, even if the dressing resistance of the grinding wheel is very large, the mounting part of the dressing tool will not swing when it is lifted up. The taper fit between the inclined surfaces and the restrictive positioning of the adjustable positioning block are the most ideal structure and matching form of the mounting part of the upside-down trimming tool and the upside-down lift mechanism.

The rotary dressing tool installed by the inverted dressing device is installed in the notch of the rotary dressing tool installation groove of the inverted dressing device on the upper side of the inverted dressing tool installation part. The opening of the notch faces the grinding wheel. The X-axis sliding table is hinged, and an adjustable positioning block is installed on the X-axis sliding table below this side; the driving rod of the inverted lifting mechanism pushes the wedge-shaped pushing block, and one side of the wedge-shaped pushing block cooperates with the inclined surface of the lower part of the mounting part of the inverted-lifting trimming tool, wedge-shaped The other side of the push block is slidably matched with the X-axis slide table, and the inclined plane opening near the other side of the upside-down trimming tool mounting part is large; The driving power of the lifting mechanism drives the driving rod to reciprocate, and the driving rod pushes the wedge-shaped push block into or out of the inclined space of the lower bottom surface of the mounting part of the lifting finishing tool. As the wedge-shaped push block gradually penetrates into the inclined space of the lower bottom surface of the upside-down dressing tool installation part, the upside-down dressing tool installation part gradually falls to the side where the rotary dressing tool is installed, and the axis of the rotary dressing tool installed on the upside-down dressing device gradually falls. Next, when the installation part of the upside-down dressing tool touches the adjustable positioning block, the swing stops. At this time, the axis of the rotating dressing tool installed on the upside-down dressing device and the axis of the dressing tool installed on the fixed dressing device are at the same time as the axis of the grinding wheel. On one plane, driven by the X-axis sliding table and the Y-axis sliding table, the rotating dressing tool installed on the inverted dressing device performs low-speed precision dressing on the grinding wheel. The adjustable positioning block makes the installation part of the upside-down dressing tool stop swinging at the same position accurately every time, and the rotating dressing tool installed on the upside-down dressing device will not move during the low-speed precision dressing process. Adjust the adjustable positioning block, change the swing angle of the installation part of the upside-down finishing tool, and control the size of the rotation finishing tool installed on the upside-down finishing device protruding from the finishing tool installed on the fixed finishing device. The inclined surface of the wedge-shaped push block of the inverted lifting mechanism cooperates with the inclined surface of the bottom surface of the lower part of the inverted lifting finishing tool installation part, which eliminates the possible fit clearance of the inverted lifting mechanism of other structures, for example, there is a gear teeth matching gap when using gears. The positioning is limited by the adjustable positioning block, the installation parts of the upside-down dressing tool are stable, and the work is reliable, so that the dressing accuracy is guaranteed to the greatest extent. Due to the effect of the inclined plane, the thrust of the driving force of the lifting mechanism is greatly increased, even if the dressing resistance of the grinding wheel is very large, the mounting part of the dressing tool will not swing when it is lifted up. The taper fit between the inclined surfaces and the restrictive positioning of the adjustable positioning block are the most ideal structure and matching form of the mounting part of the upside-down trimming tool and the upside-down lift mechanism.

The driving power of the lifting mechanism is an air cylinder or an oil cylinder. The cylinder rod is the drive rod.

The electric servo mechanism of the control system drives the X-axis sliding table and the Y-axis sliding table. Realize the independent movement of the X-axis slide table and the Y-axis slide table, and the simultaneous compound motion of the X-axis slide table and the Y-axis slide table.

The control system is a CNC control system.

The centerless grinding wheel dressing device of the present invention is installed on a centerless grinding machine horizontally or inclined at a certain angle to complete high-speed powerful dressing and low-speed precision dressing of the grinding wheel. In comparison, horizontal installation takes up more space, but it is easy to install, adjust and operate. Regardless of the installation method, when the dressing tool installed on the inverted dressing device is working, the axis of the dressing tool installed on the inverted dressing device, the axis of the dressing tool installed on the fixed dressing device and the axis of the grinding wheel on the same plane.

The existing centerless grinding machines are generally used for mass grinding of simple workpieces. For grinding some shafts with relatively simple surface shapes, including stepped shafts, since the surface is composed of straight lines, purely from a technical point of view, it can be used only One set of dressing tools completes the dressing of the grinding wheel. Of course, if two sets of dressing tools of the present invention are used to perform fast strong dressing and low-speed precision dressing of the grinding wheel respectively, the dressing efficiency and effect will be better. For shafts with complex surface shapes, such as the shafts of automobile water pump bearings, there are channels besides steps, and the shapes of the channels are arc-shaped, or even more complicated oval or peach-shaped. The grinding wheel is dressed by pre-processing the diamond roller with the same shape as the surface of the grinding wheel. However, a set of linear dressing devices currently used cannot complete the dressing of the corresponding grinding wheel at one time, although the groove on the corresponding grinding wheel A very small portion of the entire surface of the grinding wheel, but still needs to be further dressed with another dressing device. The dressing devices of the two equipments complete the dressing, which not only has low efficiency and high cost, but also affects the accuracy of the grinding wheel. The centerless grinding wheel dressing device of the present invention has two sets of dressing tools, and the dressing tool moves in the X-axis direction following the X-axis sliding table that moves independently or moves in the Y-axis direction following the Y-axis sliding table that moves independently or follows simultaneously. The moving X-axis sliding table and Y-axis sliding table make compound movements, which can complete the trimming satisfactorily.

A centerless grinding wheel dressing method using the centerless grinding wheel dressing device of the present invention, the centerless grinding wheel dressing device is located on the X-axis slide table and the Y-axis slide table without affecting the loading and unloading of the dressing tool, and the dressing tool and the grinding wheel Out of contact, the mounting part of the upside-down dressing tool is lifted, and the distance between the dressing tool installed on the upside-down dressing device and the grinding wheel is greater than the distance between the dressing tool installed on the fixed dressing device and the grinding wheel. The original position of the processing depth; under the control of the driving power of the trimming device, the driving power of the rotary driving mechanism and the driving power of the lifting mechanism by the control system, the steps of the trimming method are: use the trimming tool installed on the fixed trimming device to perform fast and powerful trimming and/or low-speed precision dressing with an upside-down dresser-mounted dressing tool.

Use the dressing tool installed in the fixed grinding wheel dressing device for fast and powerful dressing: when the dressing tool installed in the fixed grinding wheel dressing device is a fixed dressing tool, the driving power of the dressing device starts, and the X-axis slide drives the fixed grinding wheel installed in the dressing device. The dressing tool moves to the grinding wheel along the X axis, and the X-axis sliding table continues to move once from the contact of the fixed dressing tool installed in the fixed grinding wheel dressing device with the grinding wheel. The table moves independently, and the grinding feed rate is selected according to the set value. The Y-axis slide table drives the fixed dressing tool installed in the fixed grinding wheel dressing device to move along the Y-axis for dressing, or the X-axis slide table and the Y-axis slide table Simultaneous movement, the fixed dressing tool moves compoundly for dressing; when the dressing tool installed on the fixed dressing device is a rotating dressing tool, the driving power of the rotating drive mechanism starts, the driving power of the dressing device starts, and the X-axis slide table drives the fixed grinding wheel The rotating dressing tool installed in the dressing device moves to the grinding wheel along the X axis, and the X-axis slide continues to move once from the contact of the rotating dressing tool installed in the fixed grinding wheel dressing device with the grinding wheel. Then, the Y-axis sliding table moves independently, and the grinding feed rate is selected according to the set value. The Y-axis sliding table drives the rotating dressing tool installed on the fixed grinding wheel dressing device to move along the Y-axis for dressing, or the X-axis sliding table Simultaneous movement with the Y-axis sliding table, the rotating dressing tool performs compound movement for dressing; according to the depth and accuracy requirements of the grinding process in the entire grinding process, determine the number of times of dressing in this step; after this step is completed, centerless grinding is resumed The original state of the grinding wheel dressing device;

Use the dressing tool installed in the inverted grinding wheel dressing device for low-speed precision dressing: when the dressing tool installed in the inverted grinding wheel dressing device is a fixed dressing tool, the driving power of the inverted lifting mechanism is activated, and the mounting parts of the dressing tool are lifted up and down. When the mounting part of the dressing tool touches the adjustable positioning block, the driving power of the lifting mechanism is turned off; the driving power of the dressing device is started, and the X-axis slide drives the fixed dressing tool installed in the dressing device to move to the grinding wheel along the X axis. , the X-axis sliding table continues to move once from the contact of the fixed dressing tool installed in the inverted grinding wheel dressing device with the grinding wheel. Cutting feed rate, the Y-axis sliding table drives the fixed dressing tool installed in the inverted grinding wheel dressing device to move along the Y-axis for dressing, or the X-axis sliding table and Y-axis sliding table move simultaneously, and the rotating dressing tool performs compound movement , for trimming; when the trimming tool installed on the inverted trimming device is a rotary trimming tool, the driving power of the rotary drive mechanism is started, the driving power of the inverted lifting mechanism is started, the trimming tool is installed when the device is inverted, and the trimming tool is installed The component touches the adjustable positioning block, the driving power of the lifting mechanism is turned off; the driving power of the dressing device is started, and the X-axis sliding table drives the rotating dressing tool installed in the lifting grinding wheel dressing device to move to the grinding wheel along the X-axis, and the X-axis slides The table continues to move once from the contact of the rotating dressing tool installed in the inverted grinding wheel dressing device with the grinding wheel to the grinding depth of low-speed precision dressing, and then the Y-axis slide table moves independently, and the grinding feed is selected according to the set value The Y-axis sliding table drives the rotary dressing tool of the inverted grinding wheel dressing device to move along the Y axis for dressing, or the X-axis sliding table and the Y-axis sliding table move at the same time, and the rotating dressing tool installed in the inverted grinding wheel dressing device Perform compound movement and trimming; according to the depth and accuracy requirements of the grinding process in the entire grinding process, determine the number of trimming times in this step; complete this step, restore the original state of the centerless grinding wheel dressing device.

Depending on the existing condition of the grinding wheel, dressing purpose, dressing requirements, etc., choose fast powerful dressing first and then low-speed fine dressing or only fast powerful dressing or low-speed fine dressing. Usually, a new grinding wheel needs to be dressed quickly and then finely dressed at a low speed. To change the surface shape of a used grinding wheel, it is necessary to choose a fast dressing first and then a precision dressing at a low speed. Dressing, special requirements only choose strong and fast dressing, for example, in order to grind the spare grinding tools, provide several new grinding wheels that only undergo strong and fast dressing, etc.

Using the centerless grinding wheel dressing method of the centerless grinding wheel dressing device of the present invention, the two sets of dressing methods of powerful fast dressing and low-speed precision dressing are simple and convenient, smooth in connection, and high in dressing accuracy, which solves the problem of using the device of the present invention on surfaces with complex shapes. The dressing operation problem of the centerless grinding wheel.

The advantage of the present invention is that: an upside-down dressing device and a fixed dressing device are installed on the X-axis slide table perpendicular to the axis of the grinding wheel, and when the grinding wheel is quickly and powerfully dressed, the dressing tool installed on the fixed dressing device contacts the grinding wheel. Grinding wheel, when the grinding wheel is finely dressed at low speed, the dressing tool installed on the inverted dressing device contacts the grinding wheel, and the two sets of dressing devices, the fixed dressing device and the inverted dressing device, work separately, and can be used in conjunction with complex shapes. The centerless grinding wheel on the surface is dressed, which expands the dressing method and scope of the centerless grinding machine grinding wheel, avoids frequent replacement and installation of dressing tools, affects production efficiency and is easy to damage the dressing tool, and is economical, efficient and low-consumption. advantage. The step of using the centerless grinding wheel dressing method of the centerless grinding wheel dressing device of the present invention is to use the dressing tool of the fixed grinding wheel dressing device to perform fast powerful dressing and/or use the dressing tool of the inverted grinding wheel dressing device to perform low-speed precision dressing , The present invention has two sets of trimming modes of fast powerful trimming and low-speed precision trimming, with simple and convenient operation methods, smooth connection, and high trimming precision.

Description of drawings

Fig. 1 is a top view structural representation of an embodiment of a centerless grinding wheel dressing device of the present invention;

Fig. 2 is a structural schematic diagram of the state in which the Y-axis sliding table and the centerless grinder base are removed in the embodiment of Fig. 1, and the inverting mechanism drives the inverting trimming tool installation part to lift;

Fig. 3 is a schematic diagram of the structure of the embodiment in Fig. 1 when the Y-axis slide table and the base of the centerless grinder are removed, and the upside-down mechanism drives the upside-down trimming tool installation part to fall down.

detailed description

Example 1

Accompanying drawings 1-3 are the structure diagrams of an embodiment of the centerless grinding wheel dressing device of the present invention. The embodiment of the centerless grinding wheel dressing device will be described with reference to the accompanying drawings.

The Y-axis sliding table 2 is slidingly matched with the guide rail on the upper plane of the centerless grinding machine base 9. The guide rail on the upper plane of the centerless grinding machine base 9 is parallel to the axis direction of the grinding wheel 7. The driving power of the dressing device drives the Y-axis sliding table 2 along the Y axis. Axial movement, that is, the movement direction of the Y-axis slide table 2 is parallel to the axial direction of the grinding wheel 7 . The guide rail on the upper plane of the X-axis slide table 1 and the Y-axis slide table 2 is slidably matched, and the guide rail on the upper plane of the Y-axis slide table 2 is perpendicular to the guide rail on the upper plane of the centerless grinding machine substrate 9 and the axis of the grinding wheel 7 . The driving power of the dressing device drives the X-axis sliding table 1 to move along the X-axis, that is, the moving direction of the X-axis sliding table 1 is perpendicular to the axial direction of the grinding wheel 7 . The driving power of the dressing device in this embodiment is two servo motors, which respectively drive the X-axis sliding table screw and the Y-axis sliding table screw to rotate through the reducer. The screw nut is matched, the Y-axis sliding table screw is matched with the screw nut installed on the Y-axis sliding table 2, the servo motor driving the X-axis sliding table 1 is installed on the Y-axis sliding table 2, and the servo motor driving the Y-axis sliding table 2 Installed on the base body 9 of the centerless grinder. Two sets of dressing devices, a fixed grinding wheel dressing device 3 and an inverted grinding wheel dressing device 4, are installed on the upper plane of the X-axis slide table 1. The fixed grinding wheel dressing device 3 of this embodiment is equipped with a fixed dressing tool diamond strip 12, and the diamond strip 12 is fixedly installed in the mounting hole of the fixed dressing tool mounting seat of the fixed dressing device. In this embodiment, the upside-down grinding wheel dressing device 4 is installed with a rotary dressing tool diamond roller 13. In FIGS. The notch of the rotary dressing tool installation groove of the lift-type dressing device, the notch opening is on the right, facing the grinding wheel 7. In Fig. 1, the installation shaft of the diamond roller 13 is installed on the upper and lower side walls of the installation notch through bearings, the installation axis is in the direction of the Y axis, and the diamond roller 13 is fixedly installed on the installation shaft. The driving power of the rotary drive mechanism 6 of the present embodiment is a motor, and the installation shaft protruding from the upper side wall of the notch in Fig. Between the two pulleys, it is not shown in the figure. In Fig. 2 and Fig. 3, the lower right side of the upside-down dressing tool installation part 10 is hinged with the X-axis slide table 1, and an adjustable positioning block 11 is installed on the X-axis slide table 1 on the right side of the upside-down dressing tool installation part 10, The adjustable positioning block 11 in this embodiment is a bolt, which is threadedly connected with the X-axis sliding table 1 and locked with a nut. The center of gravity of the trimming tool mounting part 10 is on the left side of the hinge pin shaft when it is lifted upside down. The lower bottom surface on the left side of the dressing tool mounting part 10 is an inclined plane, and the port of the inclined plane is large, that is, the left port is large. The driving power of the lifting mechanism 5 in this embodiment is the cylinder fixed on the X-axis slide table 1, the cylinder rod is the driving rod, and the driving rod is connected to push the wedge-shaped push block. The following is slidingly matched with the upper plane of the X-axis slide table 1. The upside-down mechanism 5 drives the upside-down trimming tool mounting part 10 to swing up and down around the hinged pin shaft axis, that is, to lift and fall. swing left and right. In Fig. 2, the cylinder rod of the air cylinder retracts, and the cylinder rod drives the wedge-shaped push block to withdraw from the slope space on the bottom surface of the upside-down trimming tool mounting part, and the upside-down trimming tool mounting part 10 swings to the left around the axis of the hinged pin shaft under the action of gravity Lift up, and the diamond roller 13 installed on the mounting part 10 of the upside-down dressing tool is lifted up accordingly, and the distance between the diamond roller 13 and the grinding wheel 7 is greater than the distance between the diamond strip 12 and the grinding wheel 7. Processing depth, when the diamond strip 12 performs fast and powerful dressing on the grinding wheel 7, the diamond roller 13 is separated from the grinding wheel 7; in Figure 3, the cylinder rod of the cylinder is stretched out, and the cylinder rod pushes the wedge-shaped push block to go deep and lift the dressing tool installation part In the inclined plane space on the bottom surface, the upside-down dressing tool mounting part 10 swings to the right around the hinged pin axis and falls down, and the diamond roller 13 installed on the upside-down dressing tool mounting part 10 falls down accordingly, and the diamond strip 12 and the grinding wheel The distance of 7 is greater than the distance between the diamond roller 13 and the grinding wheel 7 and the grinding depth of the low-speed precision trimming. When the diamond roller 13 carries out the low-speed precision trimming of the grinding wheel 7, the diamond strip 12 breaks away from the grinding wheel 7. The axis of diamond strip 12 intersects vertically with the axis of grinding wheel 7 and is of equal height. When diamond roller 13 was working, the axis of diamond roller 13 was on the same plane as the axis of diamond strip 12 and the axis of grinding wheel 7. The two sets of trimming devices, the fixed trimming device 3 and the inverted trimming device 4, work separately and cannot be trimmed simultaneously. The driving power of the finishing device, the driving power of the rotary drive mechanism 6 and the driving power of the lifting mechanism 5 are connected to the control system. The control system of this embodiment is a numerical control system, and there are many options for numerical control systems. The embodiment of the present invention uses a Siemens 808D numerical control system. According to the pre-programmed program, different commands are issued to produce different movements. The diamond strip 12 and the diamond roller 13 have different purposes. According to the different dressing requirements, different dressing tools are specified in the program, and different dressing parameters are specified in the program to meet different processing requirements. According to the instructions issued by the program, Different dressing tools enter different dressing positions, and the diamond roller 13 is raised or lowered according to program instructions. The movement of the X-axis sliding table 1 and the Y-axis sliding table 2 is controlled by the CNC control system, and moves to the designated position according to the instructions of the CNC control system. The electric servo mechanism of the control system drives the X-axis sliding table 1 and the Y-axis sliding table 2 to realize the independent movement of the X-axis sliding table 1 and the Y-axis sliding table 2, or the combined movement of the X-axis sliding table 1 and the Y-axis sliding table 2 at the same time . Position sensors are installed in the X-axis movement direction of the X-axis slide table 1 and in the Y-axis movement direction of the Y-axis slide table 2, and the position sensors monitor the movement positions of the X-axis slide table 1 and the Y-axis slide table 2 , Feedback the position signal to the numerical control system in time, and the numerical control system issues instructions accordingly to form a closed-loop control. Pre-programmed in offline state and simulated program running, through the simulated operation, the trimming parameters are optimized and adjusted to improve the trimming efficiency, and then the pre-programmed and simulated running program is input to achieve fast, efficient and fine trimming of various lines. The invention solves the problem of dressing the centerless grinding wheel of complex shape products, and can dress the centerless grinding wheel on the surface of complex shape, so that the centerless grinding is not only suitable for grinding large quantities of simple shape products, but also suitable for many Grinding of varieties, small batches and complex products. The control system is not shown in the drawings.

Example 2

This embodiment is an embodiment of a centerless grinding wheel dressing method of the centerless grinding wheel dressing device described in Example 1. This embodiment is for dressing the surface of a newly replaced grinding wheel. Low speed fine dressing. The following centerless grinding wheel dressing method is completed under the control of the numerical control system.

The centerless grinding wheel dressing device is on the X-axis slide 1 and Y-axis slide 2 without affecting the installation of the diamond strip 12 and the diamond roller 13. The diamond strip 12 and the diamond roller 13 are out of contact with the grinding wheel 7, and the dressing tool is installed by lifting it upside down. Component 10 is lifted, and the distance between diamond roller 13 and grinding wheel 7 is greater than that of diamond strip 12 and grinding wheel 7. The original position of the grinding process depth of fast and powerful dressing once.

First use the diamond strip of the fixed grinding wheel dressing device 3 for fast and powerful dressing.

The dressing device drives the power motor to start, and the X-axis sliding table 1 drives the diamond strip 12 to move to the grinding wheel 7 along the X-axis, and the X-axis sliding table 1 continues to move once the diamond strip 12 contacts the grinding wheel 7 for fast and powerful dressing. The grinding depth is 1mm, the X-axis sliding table 1 and the Y-axis sliding table 2 move at the same time, the grinding feed rate is selected as 0.30mm/r according to the set value, and the Y-axis sliding table 2 drives the diamond strip 12 to move along the Y-axis , the diamond strip 12 does compound movement, and the curve of the grinding wheel is trimmed. According to the grinding depth of 2 mm and precision requirements in the entire grinding process, the above rapid and powerful dressing is done twice. After the two times of dressing are completed, the dressing device drives the power motor to drive the X-axis sliding table 1 and the Y-axis sliding table 2 to return. The dressing device drives the power motor to turn off, and restores the original state of the centerless grinding wheel dressing device.

Then use the diamond roller 13 of the inverted grinding wheel dressing device 4 to carry out low-speed precision dressing. The driving power motor of the rotary driving mechanism 6 is started, the diamond roller 13 rotates at a high speed, the driving power cylinder of the lifting mechanism 5 is started, the cylinder rod stretches out, and the mounting part 10 of the finishing tool for lifting falls down, contacts the adjustable positioning block 11, and lifts The driving power cylinder of the mechanism 5 stops moving, the distance between the diamond strip 12 and the grinding wheel 7 is greater than the distance between the diamond roller 13 and the grinding wheel 7, and the grinding depth is a low-speed precision trimming; the dressing device drives the power motor to start, and the X-axis slides Table 1 drives the diamond roller 13 of the inverted grinding wheel dressing device 4 to move to the grinding wheel 7 along the X axis, and the X-axis sliding table 1 continues to move once from the contact of the diamond roller 13 with the grinding wheel 7 for low-speed precision dressing. The processing depth is 0.10mm; the X-axis slide 1 and the Y-axis slide 2 move at the same time, and the grinding feed rate is selected according to the set value 0.01mm/r, and the Y-axis slide 2 drives the diamond roller 13 to move along the Y axis. The diamond roller 13 moves compoundly to trim the curve of the grinding wheel. According to the grinding depth of 0.20mm and precision requirements during the entire grinding process, the above-mentioned low-speed precision dressing is done twice. After the two times of dressing are completed, the dressing device drives the power motor to drive the X-axis sliding table 1 and the Y-axis sliding table 2 to return. , the driving power motor of the dressing device is turned off and the driving power motor of the rotary driving mechanism 6 is turned off, the driving power cylinder of the lifting mechanism 5 is started, the cylinder rod is retracted, the clamping part 10 of the dressing tool is lifted up, and the centerless grinding wheel dressing is resumed The original condition of the device.

Claims (10)

1. A centerless grinding wheel dressing device, including a Y-axis sliding table (2) installed on the centerless grinding machine base (9), an X-axis sliding table (1) installed on the Y-axis sliding table (2), dressing The driving power of the device drives the Y-axis sliding table (2) to move along the Y-axis parallel to the axis of the grinding wheel (7), and the dressing device drives the X-axis sliding table (1) to move along the X-axis perpendicular to the Y-axis Mobile, characterized in that two sets of dressing devices are installed on the X-axis slide table (1), a fixed dressing device (3) and an upside-down dressing device (4); the dressing tool installed on the fixed dressing device (3) is a fixed dressing tool Or rotating dressing tool; the dressing tool installed in the inverted dressing device (4) is a rotating dressing tool or a fixed dressing tool; the rotary drive mechanism (6) drives the rotating dressing tool to rotate around the Y axis; the inverted dressing device (4) The installation part (10) of the upside-down dressing tool is hinged on the X-axis slide table (1), and the upside-down mechanism (5) of the upside-down dressing device (4) drives the upside-down dressing tool installation part (10) around the hinged pin The shaft axis swings, and when the upside-down dressing tool installation part (10) is lifted, the distance between the dressing tool installed on the upside-down dressing device (4) and the grinding wheel (7) is greater than that installed on the fixed dressing device (3) The distance between the tool and the grinding wheel (7) is the grinding depth of the fast and powerful dressing. When the dressing tool mounting part (10) is lifted upside down, the dressing tool and the grinding wheel (7) installed on the fixed dressing device (3) will ) is greater than the distance between the dressing tool installed on the inverted dressing device (4) and the grinding wheel (7) and the grinding depth of the low-speed precision dressing; the driving power of the dressing device and the driving power of the rotating drive mechanism (6) It is connected with the driving power of the lifting mechanism (5) to the control system. 2. A centerless grinding wheel dressing device according to claim 1, characterized in that when the dressing tool installed in the inverted dressing device (4) is working, the axis of the dressing tool installed in the inverted dressing device (4) . The axis of the dressing tool installed in the fixed dressing device (3) and the axis of the grinding wheel (7) are on the same plane. 3. A centerless grinding wheel dressing device according to claim 1, characterized in that the fixed dressing tool installed in the fixed dressing device (3) is fixed on the fixed dressing tool mounting seat of the fixed dressing device, facing the grinding wheel. The axis of the grinding wheel (7) is perpendicular to the axis of the grinding wheel (7), and both are on the same plane. 4. A centerless grinding wheel dressing device according to claim 1, characterized in that the rotating dressing tool installed in the fixed dressing device (3) is installed in the notch of the rotating dressing tool installation groove of the fixed dressing device, the notch The opening faces the grinding wheel (7), and the axis of the rotating dressing tool installed in the fixed dressing device (3) is parallel to the axis of the grinding wheel (7). 5. A centerless grinding wheel dressing device according to claim 1, characterized in that the fixed dressing tool installed in the inverted dressing device (4) is fixedly installed on the inverted lifting dressing tool installation part (10). The dressing device is fixed on the dressing tool mounting seat, the fixed dressing tool installed on the inverted dressing device (4) faces the grinding wheel (7), and the side of the inverted dressing tool mounting part (10) is close to the grinding wheel (7) The lower part of the side is hinged with the X-axis slide (1), and an adjustable positioning block (11) is installed on the X-axis slide (1) below the side; the drive rod of the upside-down mechanism (5) pushes the wedge-shaped push block, One side of the upside-down trimming tool installation part is matched with the bottom slope of the lower part, and the other side of the wedge-shaped push block is slidingly matched with the X-axis slide table (1). The center of gravity of the upside-down trimming tool installation part (10) is biased to the other side of the upside down trimming tool installation part (10). 6. A centerless grinding wheel dressing device according to claim 1, characterized in that the rotating dressing tool installed in the upside-down dressing device (4) is installed on the upper side of the upside-down dressing tool installation part (10). In the notch of the rotary dressing tool installation groove of the lifting dressing device, the opening of the notch faces the grinding wheel (7), and the lower part of this side is hinged with the X-axis sliding table (1), and the X-axis sliding table (1) below this side An adjustable positioning block (11) is installed on the top; the driving rod of the upside-down mechanism (5) pushes the wedge-shaped push block, one side of the wedge-shaped push block cooperates with the inclined surface of the lower bottom surface of the installation part of the upside-down trimming tool, and the other side of the wedge-shaped push block matches the X-axis The slide table (1) is slidably fitted, and the opening of the inclined plane near the other side of the upside-down trimming tool installation part (10) is large; side. 7. A centerless grinding wheel dressing device according to claim 1, characterized in that the electric servo mechanism of the control system drives the X-axis sliding table (1) and the Y-axis sliding table (2); the control system is a numerical control system . 8. A centerless grinding wheel dressing method using any centerless grinding wheel dressing device in claims 1 to 7, characterized in that the centerless grinding wheel dressing device is located on the X-axis sliding table (1) and the Y-axis sliding table (2 ) does not affect the loading and unloading of the dressing tool, the dressing tool is out of contact with the grinding wheel (7), the upside-down dressing tool mounting part (10) is lifted, and the dressing tool installed on the upside-down dressing device (4) is in contact with the grinding wheel (7). The distance between the grinding wheel (7) is greater than the distance between the dressing tool installed on the fixed dressing device (3) and the grinding wheel (7) to the original position of the grinding depth of high-speed powerful dressing; Under the control of the driving power of the driving mechanism (6) and the driving power of the lifting mechanism (5), the steps of the trimming method are: use the trimming tool installed on the fixed trimming device (3) to perform fast and powerful trimming and/or use the trimming tool The dressing tool installed in the dressing device (4) performs low-speed precision dressing. 9. The centerless grinding wheel dressing method of a centerless grinding wheel dressing device according to claim 8, characterized in that the dressing tool installed in the fixed grinding wheel dressing device (3) is used for fast and powerful dressing: when the fixed grinding wheel When the dressing tool installed in the dressing device (3) is a fixed dressing tool, the driving power of the dressing device is started, and the X-axis slide table (1) drives the fixed dressing tool installed in the fixed grinding wheel dressing device (3) to move along the X axis to grind Grinding wheel (7), X-axis sliding table (1) continues to move once from the fixed dressing tool installed in the fixed grinding wheel dressing device (3) and the grinding wheel (7) to the grinding depth of fast and powerful dressing, and then, Y The axis sliding table (2) moves independently, and the grinding feed rate is selected according to the set value. The Y-axis sliding table (2) drives the fixed dressing tool installed in the fixed grinding wheel dressing device (3) to move along the Y axis for dressing , or the X-axis sliding table (1) and Y-axis sliding table (2) move at the same time, and the fixed dressing tool moves compoundly for dressing; when the dressing tool installed on the fixed dressing device (3) is a rotating dressing tool, the rotating drive The driving power of the mechanism (6) is started, the driving power of the dressing device is started, and the X-axis slide table (1) drives the rotating dressing tool installed in the fixed grinding wheel dressing device (3) to move to the grinding wheel (7) along the X axis, and the X The axis sliding table (1) continues to move once from the contact of the rotating dressing tool installed in the fixed grinding wheel dressing device (3) to the grinding wheel (7), and then the Y-axis sliding table (2) Independent movement, the grinding feed rate is selected according to the set value, the Y-axis sliding table (2) drives the rotating dressing tool installed on the fixed grinding wheel dressing device (3) to move along the Y-axis for dressing, or the X-axis sliding table (1) Simultaneous movement with the Y-axis sliding table (2), and the rotating dressing tool performs compound movement for dressing; according to the depth and accuracy requirements of the grinding process in the entire grinding process, the number of times for dressing in this step is determined; this step Finished, restore the original condition of the centerless grinding wheel dressing unit. 10. The centerless grinding wheel dressing method of a centerless grinding wheel dressing device according to claim 8, characterized in that the dressing tool installed in the upside-down grinding wheel dressing device (4) is used for low-speed precision dressing: when the upside down When the dressing tool installed in the type dressing device (4) is a fixed dressing tool, the driving power of the lifting mechanism (5) is started, and the mounting part (10) of the dressing tool is lifted up and down, and the mounting part (10) of the dressing tool (10) can be touched. Adjust the positioning block (11), the driving power of the lifting mechanism 5 is turned off; the driving power of the dressing device is started, and the X-axis sliding table (1) drives the fixed dressing tool installed in the lifting grinding wheel dressing device (4) to move along the X axis. Grinding grinding wheel (7), X-axis sliding table (1) continues to move once from the fixed dressing tool installed in the inverted grinding wheel dressing device (4) and the grinding wheel (7) to the grinding depth of low-speed precision dressing, Then, the Y-axis sliding table (2) moves independently, and the grinding feed rate is selected according to the set value. The Y-axis sliding table (2) drives the fixed dressing tool installed on the inverted grinding wheel dressing device (4) to move along the Y-axis Move and trim, or the X-axis slide (1) and Y-axis slide (2) move at the same time, and the rotating dressing tool performs compound movement for dressing; when the dressing tool installed on the inverted dressing device (4) is a rotating dressing When the tool is in use, the driving power of the rotating drive mechanism (6) is started, the driving power of the lifting mechanism (5) is started, the mounting part (10) of the trimming tool is lifted up and down, and the mounting part (10) of the trimming tool (10) is in contact with the adjustable positioning Block (11), the driving power of the lifting mechanism (5) is turned off; the driving power of the dressing device is started, and the X-axis slide table (1) drives the rotating dressing tool installed in the lifting grinding wheel dressing device (4) to move along the X axis. The grinding wheel (7), the X-axis slide table (1) continues to move once from the contact of the rotating dressing tool installed in the inverted grinding wheel dressing device (4) to the grinding wheel (7), and the grinding depth of the low-speed precision dressing, Then, the Y-axis sliding table (2) moves independently, and the grinding feed rate is selected according to the set value, and the Y-axis sliding table (2) drives the rotating dressing tool of the inverted grinding wheel dressing device (4) to move along the Y-axis , for dressing, or the X-axis sliding table (1) and Y-axis sliding table (2) move at the same time, and the rotating dressing tool installed in the inverted grinding wheel dressing device (4) performs compound movement for dressing; according to the needs of the entire grinding process The depth and precision requirements of the grinding process determine the number of dressing times in this step; after this step is completed, the original state of the centerless grinding wheel dressing device is restored.