CN111069990A

CN111069990A - Centerless grinder bracket

Info

Publication number: CN111069990A
Application number: CN202010017104.9A
Authority: CN
Inventors: 杨方刚
Original assignee: Zhejiang Faynin Machine Tool Mfg Co ltd
Current assignee: Zhejiang Faynin Machine Tool Mfg Co ltd
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-04-28

Abstract

The invention provides a centerless grinder bracket which comprises a bracket base, a jaw movably connected to the bracket base, a supporting plate fixed on the bracket base and a guide plate connected to the jaw, wherein the jaw is at least one group, every two of the jaws are one group, a groove for clamping the guide plate is arranged on the inner side of the jaw, the groove is directly machined on the inner side of the jaw or formed by combining other parts, the groove has a gap for adjusting the angle of the guide plate after the guide plate is clamped into the groove, and a first adjusting part for adjusting the angle of the guide plate is arranged on the jaw. The upper part of the jaw is provided with a groove for clamping the guide plate, the guide plate is tightly attached to the groove and placed on the plane of the jaw, and the guide plate is locked by the guide plate pressing block through screws. Meanwhile, the first adjusting parts (guide plate fine adjustment screws) at two positions on the back of the jaw can be screwed out through screwing so as to adjust the working plane of the guide plate and realize the parallelism with the working bus of the bracket. The design greatly increases the positioning rigidity of the guide plate, and micron-level precision can be realized through adjustment.

Description

Centerless grinder bracket

Technical Field

The invention belongs to the technical field of grinding machines, and particularly relates to a bracket for supporting a workpiece in a centerless grinding machine.

Background

When the centerless grinding machine carries out through-type grinding, a workpiece firstly passes through a guide area positioned by a bracket guide plate and a supporting plate and then enters a grinding area acted on the workpiece by a grinding wheel, a guide wheel and the supporting plate. In order to realize higher workpiece precision, a workpiece linear motion bus defined by the guide plate and the supporting plate in the guide area is coincided with a workpiece grinding bus defined by the supporting plate and the guide wheel in the grinding area, and the coincided bus is generally called a bracket working bus. When the bracket is arranged on the grinding machine, the working bus of the bracket is also adjusted to be parallel to two axes of a grinding wheel of the grinding machine and a main shaft of a guide wheel.

In the prior art, as shown in fig. 1-3, 4 bracket guide plates are locked and installed on two sets of front and back jaws, each set of left and right jaws, through the head conical surface of a locking screw.

The left jaw and the right jaw are tensioned through a positioning block, a pressure spring and a supporting rod, a left adjusting bolt is tightly propped against the inclined plane of the positioning block, and a right jaw is tightly propped against a lever through a right adjusting bolt. In order to adapt to workpieces with different diameters, an operator can adjust the opening and closing of the jaw by rotating and lifting the bolt up and down. The jaw is provided with a mounting hole, and when the jaw is mounted, the rotating shaft penetrates through the mounting holes of the bracket base and the jaw and is relatively fixed with the jaw through the positioning pin. When the jaw is opened and closed, the jaw is rotated relative to the hole of the bracket seat body through the rotating shaft.

The bottom of the bracket base is provided with a groove, and a pin or a key is arranged in the groove. When the bracket is installed on the sliding plate of the centerless grinder, the working bus of the bracket is parallel to the axis of the spindle by adjusting the position of the pin or the key. This design needs to process a longer elongated slot of length to bracket pedestal bottom, and this groove processing is wasted time and energy, is unfavorable for production and processing.

As known from the working principle, the contact plane of the guide plate and the workpiece is parallel to the axis of the workpiece. Such accuracy is subject to a number of limitations, such as accuracy and fit of the bracket body to the pivot axis, accuracy and fit of the pivot axis to the jaw opening, and geometric tolerances of the guide plate mounting surface and opening of the jaw. An adjusting ring with an accumulated precision error is not designed in the original design, and finally the precision is poor.

In the design of the slewing mechanism of the jaw, the slewing axis of the jaw is determined by the hole of the bracket base, and the bracket base has larger volume and complex structure, so that the processing precision of the positioning hole is difficult to improve.

Disclosure of Invention

The invention mainly solves the technical problem of how to improve the precision between a workpiece and a guide plate contact line and improve the parallelism of the contact line and a machine tool working bus.

The invention is realized by the following technical scheme:

the utility model provides a centerless grinder bracket, includes bracket pedestal, swing joint keep silent on the bracket pedestal, fix the layer board on the bracket pedestal and connect the baffle on keeping silent, keep silent for at least a set of, and two liang of a set of, be equipped with the groove that supplies the baffle card to go into in keeping silent the inboard, this groove direct processing is keeping silent inboard or is formed through other part combinations, this groove has the clearance that supplies to adjust the baffle angle behind this groove is gone into to the baffle card, is equipped with the first regulating part of adjusting the baffle angle on keeping silent. The upper part of the jaw is provided with a groove for clamping the guide plate, the guide plate is tightly attached to the groove and placed on the plane of the jaw, and the guide plate is locked by the guide plate pressing block through screws. Meanwhile, the first adjusting parts (guide plate fine adjustment screws) at two positions on the back of the jaw can be screwed out through screwing so as to adjust the working plane of the guide plate and realize the parallelism with the working bus of the bracket. The design greatly increases the positioning rigidity of the guide plate, and micron-level precision can be realized through adjustment.

In order to improve the precision control of the jaw rotation axis, the jaw is connected with the bracket base body through a positioning mandrel bolt, and the jaw rotates by taking the excircle of the positioning mandrel bolt as a rotation axis. The design has higher precision requirement on the jaw hole and lower precision requirement on the hole of the bracket base, and because the jaw workpiece is smaller, the processing is more convenient, the precision is easy to control, and higher precision is easy to realize.

The adjusting mechanism is designed to comprise a positioning block fixedly connected to the bracket base, a first inclined plane and a second inclined plane are arranged on the positioning block, a second adjusting piece is movably connected to each jaw, the end part of each second adjusting piece is abutted against the first inclined plane and the second inclined plane on the positioning block respectively, and the opening and closing of the jaws of the group are adjusted by adjusting the position of the second adjusting piece on the positioning block. The design of the jaw opening and closing mechanism is simplified. The positioning block is provided with two inclined planes, the left and right adjusting bolts are tightly propped against the inclined planes of the positioning block, and are pre-tightened through tension springs arranged on the jaws to keep pre-tightening force. When the adjusting bolt is rotated, the jaws and the positioning block generate relative displacement so as to realize that the jaws on the two sides are opened at a set angle.

Drawings

FIG. 1 is a perspective view of the background art;

FIG. 2 is a schematic view of a prior art connecting structure of a guide plate and a jaw;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a perspective view of the present invention;

FIG. 5 is a front view of the present invention;

FIG. 6 is a cross-sectional view of the present invention;

FIG. 7 is a right side view of the present invention;

FIG. 8 is a schematic view of the structure of the jaws of the present invention;

FIG. 9 is a schematic structural view of a briquette according to the present invention;

FIG. 10 is a schematic view of a positioning block according to the present invention;

fig. 11 is a schematic structural view of the skateboard of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples.

Examples

As shown in fig. 4-11, a centerless grinder bracket includes a bracket base 1, two sets of jaws 2 movably connected to the bracket base 1, a supporting plate 13 fixed to the bracket base 1, and a guide plate 3 connected to the jaws 2, the lower end of the bracket base 1 is connected to a sliding plate 4, in this embodiment, the jaws 2 are arranged in two sets, and are symmetrically arranged in pairs, a slot for the guide plate 3 to be inserted is arranged inside each jaw 2, in this embodiment, the slot is formed by connecting a pressing block 7 to an end of the jaw 2 so that the pressing block 7 extends to a position between the lower end surface of the guide plate 3 and the jaw 2, the slot has a gap for adjusting the angle of the guide plate 3 after the guide plate 3 is inserted into the slot, a first adjusting member 6 for adjusting the angle of the guide plate 3 is arranged on the jaw 2, the guide plate 3 is clamped in the slot 5 and is tightly fixed by the first adjusting member 6, in order to adjust the front and back, two first adjusting pieces 6 are arranged on the single jaw 2, the first adjusting pieces 6 are screws connected to the jaw 2 in a threaded mode, and the end portions of the first adjusting pieces 6 abut against the guide plate 3.

The jaw 2 on be equipped with first screens 21, first screens 21 is the groove that becomes the acute angle with the 2 internal surface of jaw in this embodiment, be equipped with second screens 71 on the briquetting 7 that corresponds, the groove that becomes the acute angle with the 2 internal surface of jaw at place second screens 71 on the briquetting 7 equally, briquetting 7 installs the draw-in groove that first screens 21 and second screens 71 formed the restriction baffle 3 roll-off jointly after 2 last back of jaw, this draw-in groove is dovetail 5 in this embodiment, briquetting 7 passes through the up end of screw fixation at jaw 2 in this embodiment.

In order to adapt to workpieces with different sizes, the opening size of the jaws 2 needs to be adjusted, and therefore the adjustable device further comprises an adjusting mechanism for adjusting the opening and closing of each set of jaws 2, the adjusting mechanism comprises a positioning block 8 fixedly connected to the bracket base 1, a first inclined surface 81 and a second inclined surface 82 are arranged on the positioning block 8, in this embodiment, the first inclined surface 81 and the second inclined surface 82 are symmetrically arranged and are both arranged on the upper end surface of the positioning block 8, a second adjusting piece 9 is movably connected to each jaw 2, the end part of each second adjusting piece 9 is respectively abutted to the first inclined surface 81 and the second inclined surface 82 on the positioning block 8, and the opening and closing of the set of jaws 2 are adjusted by adjusting the position of the second adjusting piece 9 on the positioning block 8. In this embodiment, each second adjusting member 9 is a bolt, and is disposed to penetrate through the corresponding jaw 2.

In order to make the device more compact, a space for the positioning block 8 to extend into is provided on the two jaws 2 of each set of jaws 2, and the first inclined surface 81 and the second inclined surface 82 of the positioning block 8 partially extend into the space of the two jaws 2 respectively. Each second adjusting piece 9 extends into the space of the jaw 2 and is abutted against the positioning block 8.

In order to enable the jaws 2 to automatically rebound (in this embodiment, elastic potential energy is automatically generated in the opening direction) in the process of adjusting the opening and closing of the jaws 2, an elastic element 10 for keeping the jaws 2 in a pre-tightening force is connected between the two jaws 2 of each set of jaws 2. The elastic member 10 in this embodiment is a tension spring, two ends of the tension spring are respectively connected to the end portions of the two jaws 2, and the two jaws 2 are both provided with a hook portion 22 for hooking the tension spring. The hook 22 is a screw connected to the lower end of the jaw 2 in this embodiment, and the hook 22 is disposed below the rotation point of the jaw 2 in this embodiment. The design of the jaw 2 opening and closing mechanism is simplified. The positioning block 8 is provided with two inclined planes, the left and right adjusting bolts are tightly propped against the inclined planes of the positioning block 8, and are pre-tightened through a tension spring arranged on the jaw 2 to keep pre-tightening force. When the adjusting bolt is rotated, the jaws 2 and the positioning block 8 generate relative displacement, so that the jaws 2 on the two sides are opened at a preset angle.

In order to improve the machining precision between the jaw 2 and the bracket base 1 and the machining precision difficulty, the jaw 2 and the bracket base 1 are connected through a positioning mandrel 11 bolt, and the jaw 2 rotates by taking the excircle of the positioning mandrel 11 bolt as a rotation axis. That is to say 2 relative positioning core axle 11 rotations of keeping silent, and positioning core axle 11 is fixed with bracket pedestal 1, and this kind of design is higher to the required precision in 2 holes of keeping silent, add man-hour only need the focus with 2 hole processing accurate can, and lower to bracket pedestal 1's hole required precision, and 2 volumes of keeping silent are less relatively bracket pedestal 1, guarantee the machining precision more easily to realize higher precision easily.

The slide plate 4 is fixedly connected with a positioning piece 12, the lower end face of the bracket seat body 1 is provided with a chute for the movement of the positioning piece 12, and the positioning piece 12 is clamped in the chute of the bracket seat body 1 after the bracket seat body 1 is connected with the slide plate 4. The fixing member 12 is fixed to the slide 4 more conveniently because of the front installation than the conventional installation at the lower end of the pallet body 1.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to explain the principles of the invention, and that various modifications and alterations can be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a centerless grinder bracket, includes bracket pedestal, swing joint keep silent on the bracket pedestal, fix the layer board on the bracket pedestal and connect the baffle on keeping silent, keep silent for at least a set of, and two liang of a set of, its characterized in that: the inner side of the jaw is provided with a groove for the guide plate to be clamped in, the groove is directly machined on the inner side of the jaw or formed by combining other parts, the groove is provided with a gap for adjusting the angle of the guide plate after the guide plate is clamped in the groove, and the jaw is provided with a first adjusting piece for adjusting the angle of the guide plate.

2. A centerless grinder bracket as defined in claim 1, wherein: the single jaw is provided with two first adjusting pieces, and the first adjusting pieces are screws connected to the jaw in a threaded mode.

3. A centerless grinder bracket as defined in claim 1, wherein: the groove is directly processed at the inner side of the jaw; or the end part of the jaw is connected with a pressing block to enable the pressing block to extend to the position between the lower end face of the guide plate and the jaw to form a dovetail groove, and the guide plate is clamped in the dovetail groove and is tightly fixed through the first adjusting part.

4. A centerless grinder bracket as defined in claim 2, wherein: keep silent and be equipped with first screens, be equipped with the second screens on the briquetting that corresponds, the briquetting is installed and is kept silent and first screens and second screens form the draw-in groove of restriction baffle roll-off jointly.

5. A centerless grinder carriage as defined in claim 1 or 2 or 3 or 4 wherein: the adjusting mechanism comprises a positioning block fixedly connected to the bracket base, a first inclined plane and a second inclined plane are arranged on the positioning block, a second adjusting piece is movably connected to each jaw, the end part of each second adjusting piece is abutted against the first inclined plane and the second inclined plane on the positioning block respectively, and the opening and closing of the jaws of the group are adjusted by adjusting the position of the second adjusting piece on the positioning block.

6. A centerless grinder bracket as defined in claim 5, wherein: the two jaws of each group of jaws are provided with spaces for the positioning block to extend into, and the first inclined plane and the second inclined plane of the positioning block respectively extend into the spaces of the two jaws.

7. A centerless grinder bracket as defined in claim 6, wherein: an elastic piece which enables the jaw to keep the pretightening force is connected between the two jaws of each group of jaws.

8. A centerless grinder bracket as defined in claim 7, wherein: the elastic piece be the extension spring, the tip at two keep silent is connected respectively at extension spring both ends, keep silent and all be equipped with the hook portion that supplies the extension spring to catch on two.

9. A centerless grinder carriage as defined in claim 1 or 2 or 3 or 4 wherein: the jaw is connected with the bracket base body through a positioning mandrel bolt, and the jaw rotates by taking the excircle of the positioning mandrel bolt as a rotation axis.

10. A centerless grinder carriage as defined in claim 1 or 2 or 3 or 4 wherein: the lower end of the bracket seat body is connected with a sliding plate, a positioning piece is fixedly connected on the sliding plate, a sliding groove for the movement of the positioning piece is arranged on the lower end surface of the bracket seat body, and the positioning piece is clamped into the sliding groove of the bracket seat body after the bracket seat body is connected with the sliding plate.