CN110948252B

CN110948252B - Clamping mechanism for processing bolt ball reference surface

Info

Publication number: CN110948252B
Application number: CN201911070733.1A
Authority: CN
Inventors: 吴明贵
Original assignee: LENGSHUIJIANG TIANBAO INDUSTRIAL CO LTD
Current assignee: LENGSHUIJIANG TIANBAO INDUSTRIAL Co.,Ltd.
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2021-12-21
Anticipated expiration: 2039-11-05
Also published as: CN110948252A

Abstract

The invention relates to the technical field of sphere machining equipment and discloses a clamping mechanism for machining a bolt sphere datum plane, which comprises an installation base, wherein a fixed sleeve is fixedly installed inside the left side of the installation base, a locking nut is movably sleeved inside the fixed sleeve, the fixed sleeve and the locking nut are in transmission connection through an adjusting mechanism, a locking screw is connected inside the locking nut in a threaded manner, a fixed pressing plate is arranged at the right end of the locking screw, and an adjusting sleeve is movably sleeved inside the right side of the installation base. This a fixture for processing of bolt ball reference surface through the setting of three-jaw depression bar, can follow three direction and exert pressure to one side of bolt spheroid simultaneously to the extrusion of cooperation fixed pressure plate can be stabilized effectually fixes the bolt spheroid on certain position, can not take place to roll or the problem of slope because of the cutting atress, the effectual stability and the reliability that has improved this fixture.

Description

Clamping mechanism for processing bolt ball reference surface

Technical Field

The invention relates to the technical field of sphere machining equipment, in particular to a clamping mechanism for machining a bolt sphere datum plane.

Background

The bolt ball is a grid structure which is provided with a plurality of holes containing internal threads on a ball body and is used for connecting a plurality of connecting rods to one point, and the production and processing process mainly comprises blank blanking forging forming, cutting processing of a reference surface, processing and forming of threaded holes and the like, wherein the reference surface is used as the processing standard of the threaded holes and can directly influence the processing precision of the threaded holes.

Moreover, the datum surfaces of the bolt balls are generally arranged in two groups and symmetrically (as shown in fig. 1) so as to avoid the influence of the fixed clamp on the cutting tool when the threaded hole is machined, at present, when the datum plane of the bolt ball is cut, a three-jaw chuck fixing mode is adopted, but because the bolt ball is of a ball structure, the bolt ball and the chuck are in a point contact clamping way, the phenomenon of rolling and inclining is easy to occur in the cutting stress process, so that the parallelism between two groups of reference surfaces is poor, the precision is low, and when the second group of reference surfaces is cut, due to the curved surface structure of the ball body, in the clamping process, the first group of reference surfaces are difficult to ensure to be always in a horizontal state, and the phenomenon of rolling inclination is easy to occur in the clamping process, so that the cutting processing efficiency of the bolt ball reference surfaces is low and the precision is poor.

Disclosure of Invention

Technical problem to be solved

The invention provides a clamping mechanism for processing a bolt ball datum plane, which has the advantages of higher clamping stability and reliability of a ball body, better precision and parallelism of two groups of datum planes, no need of re-clamping and positioning for a second group of datum planes and higher cutting efficiency, solves the problems that the prior method for cutting the datum plane of the bolt ball adopts a three-jaw chuck fixing mode, but because the bolt ball is of a ball body structure and is in a point contact clamping mode with the chuck, the phenomenon of rolling inclination is easy to occur in the cutting stress process, the parallelism between the two groups of datum planes is poorer and the precision is lower, and because of the curved surface structure of the ball body, the first group of datum plane is difficult to be ensured to be always in a horizontal state in the clamping process when the second group of datum plane is cut, the phenomenon of rolling and inclining easily occurs in the clamping process, so that the cutting processing efficiency of the bolt ball reference surface is low and the precision is poor.

(II) technical scheme

The invention provides the following technical scheme: a clamping mechanism for processing a bolt ball reference surface comprises an installation base, wherein a fixed sleeve is fixedly installed inside the left side of the installation base, a locking nut is movably sleeved inside the fixed sleeve, the fixed sleeve is in transmission connection with the locking nut through an adjusting mechanism, a locking screw is in threaded connection inside the locking nut, a fixed pressing plate is arranged at the right end of the locking screw, an adjusting sleeve is movably sleeved inside the right side of the installation base, a three-jaw pressure rod is movably sleeved inside the adjusting sleeve, a wedge-shaped pressing block is arranged on the outer surface of the three-jaw pressure rod and is movably sleeved inside the adjusting sleeve, a spreading pull rod is movably connected inside the three-jaw pressure rod, the left end of the spreading pull rod is in pin contact with the left side of the inner wall of the three-jaw pressure rod, the right side of the outer surface of the spreading pull rod is in threaded connection with the adjusting nut movably sleeved on the right side of the outer portion of the three-jaw pressure rod, and a bolt ball body is clamped between the fixed pressing plate and the three-jaw pressing rod.

Preferably, the adjusting mechanism adopts a worm gear transmission mode, and a group of rotating marks are arranged on the outer surface of the fixed sleeve at intervals of 90 degrees.

Preferably, the fixed pressing plate is internally provided with a concave curved surface structure, and the fixed pressing plate is made of rubber.

Preferably, the inclination angle of the inner wall of the three-jaw pressure lever is 15 degrees, and the left end of the three-jaw pressure lever is provided with an arc-shaped structure.

Preferably, the left end of the distraction rod is provided with a circular truncated cone structure, the inclination angle of a bus of the circular truncated cone structure is the same as that of the inner wall of the three-jaw pressure rod, and the right end of the outer surface of the distraction rod is provided with a threaded structure and is in threaded transmission connection with the inner wall of the adjusting nut.

(III) advantageous effects

The invention has the following beneficial effects:

1. this a fixture for processing of bolt ball reference surface through the setting of three-jaw depression bar, can follow three direction and exert pressure to one side of bolt spheroid simultaneously to the extrusion of cooperation fixed pressure plate can be stabilized effectually fixes the bolt spheroid on certain position, can not take place to roll or the problem of slope because of the cutting atress, the effectual stability and the reliability that has improved this fixture.

2. This a fixture for processing of bolt ball reference surface, to the setting of stationary platen indent curved surface structure, make it when to the right side extrusion centre gripping bolt spheroid, can form an ascending holding power to the bolt spheroid, make the phenomenon that gliding can not appear in the spheroidal top of bolt when the cutting process atress, simultaneously to the setting of stationary platen material, when the bolt spheroid of the different diameters of centre gripping, elastic deformation and inseparable laminating that can pass through the material are on the spheroidal surface of bolt, and then effectual clamping effect and the application scope who improves stationary platen.

3. This a fixture for processing of bolt ball reference surface to guiding mechanism worm gear transmission's mode, because the worm gear has the function of auto-lock at driven in-process, can only utilize the worm to drive the turbine rotatory, at the in-process that adjusts the rotation bolt spheroid and carry out cutting process to its top, the phenomenon of rotation can not appear, stability and reliability are better, need not fix a position the clamping to the bolt spheroid again moreover, and then improved the work efficiency to the processing of bolt ball reference surface.

Drawings

FIG. 1 is a schematic view of a bolt ball datum plane;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a cross-sectional view of a structural three-jaw strut of the present invention;

fig. 4 is a schematic structural view of the expanding pull rod of the invention.

In the figure: 1. installing a base; 2. fixing the sleeve; 3. locking the nut; 4. an adjustment mechanism; 5. locking the screw rod; 6. fixing the pressing plate; 7. an adjustment sleeve; 8. a three-jaw pressure lever; 9. a wedge-shaped pressing block; 10. the pull rod is propped open; 11. adjusting the nut; 12. a bolt sphere.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2-4, a clamping mechanism for processing a bolt ball reference surface comprises an installation base 1, a fixed sleeve 2 is fixedly installed inside the left side of the installation base 1, a locking nut 3 is sleeved inside the fixed sleeve 2 in a movable mode, the fixed sleeve 2 is in transmission connection with the locking nut 3 through an adjusting mechanism 4, a locking screw 5 is connected with the internal thread of the locking nut 3, a fixed pressing plate 6 is arranged at the right end of the locking screw 5, an adjusting sleeve 7 is sleeved inside the right side of the installation base 1 in a movable mode, a three-jaw pressure rod 8 is sleeved inside the adjusting sleeve 7 in a movable mode, a wedge-shaped pressing block 9 is arranged on the outer surface of the three-jaw pressure rod 8 and is in movable mode with the adjusting sleeve 7 in a sleeved mode, a distraction pull rod 10 is movably connected inside the three-jaw pressure rod 8, the left end of the distraction pull rod 10 is in pin contact with the left side of the inner wall of the three-jaw pressure rod 8, and the right side of the outer surface of the distraction pull rod 10 is in threaded connection with the adjusting nut 11 movably sleeved on the right side of the outer portion of the three-jaw pressure rod 8 in a movable mode And a bolt ball body 12 is clamped between the fixed pressing plate 6 and the three-jaw pressing rod 8.

In the technical scheme, the adjusting mechanism 4 adopts a worm gear transmission mode, and a group of rotating marks are arranged on the outer surface of the fixed sleeve 2 at intervals of 90 degrees.

Wherein, adopt the driven mode of turbine worm to guiding mechanism 4, because the turbine worm has the function of auto-lock at driven in-process, can only utilize the worm to drive the turbine rotatory, in the in-process of adjusting and rotating bolt spheroid 12 and carrying out cutting process to its top, the phenomenon of rotation can not appear, stability and reliability are better, and to the setting of the 2 outer surface rotation marks of fixed sleeve, the staff of being convenient for looks over the angle of correction to the rotation of bolt spheroid 12, make its parallel degree when top and the bottom processing reference plane to bolt spheroid 12 better, the precision is higher.

In this technical scheme, the inside of fixed pressing plate 6 is equipped with indent curved surface structure, and fixed pressing plate 6 adopts and is that the rubber material preparation forms.

Wherein, to the setting of the concave curved surface structure of holding plate 6, make it when to right side extrusion centre gripping bolt spheroid 12, can form an ascending holding power to bolt spheroid 12, make the top of bolt spheroid 12 the phenomenon that the gliding can not appear when the cutting process atress, simultaneously to the setting of holding plate 6 material, when the bolt spheroid 12 of the different diameters of centre gripping, elastic deformation through the material and inseparable laminating are on the surface of bolt spheroid 12, make its atress more even reliable, the effectual centre gripping effect and the application scope that have improved holding plate 6.

In this technical scheme, the inclination of three-jaw depression bar 8 inner wall is equipped with 15 jiaos, and the left end of three-jaw depression bar 8 is equipped with the arc structure.

Wherein, to the setting of three-jaw depression bar 8, can follow three directions and exert pressure to one side of bolt spheroid 12 simultaneously to the extrusion of cooperation fixed pressing plate 6 can be effectual fix bolt spheroid 12 in certain position, can not take place to roll or the problem of slope because of the cutting atress, further improvement this fixture's stability and reliability.

In the technical scheme, the left end of the distraction rod 10 is provided with a circular truncated cone structure, the inclination angle of a bus of the circular truncated cone structure is the same as that of the inner wall of the three-jaw pressure rod 8, and the right end of the outer surface of the distraction rod 10 is provided with a threaded structure and is in threaded transmission connection with the inner wall of the adjusting nut 11.

Wherein, to the setting of strutting the 10 left end round platforms of pull rod, the inclination of the 8 inner walls of cooperation three-jaw depression bar, can utilize and strut pull rod 10 to adjust the size of strutting of three-jaw depression bar 8, thereby when the great bolt spheroid 12 of centre gripping diameter, it is great to make its area that stretches into the inside of three-jaw depression bar 8, and then cooperation fixed pressing plate 6 set up to it provides great holding power, can not appear the phenomenon of rolling or slope at the in-process of cutting process atress, and strut the setting of size to three-jaw depression bar 8, when the bolt spheroid 12 of different diameters is faced, can effectually avoid taking place to hinder the problem of cutter operation because of the degree of depth of its top cutting is too big.

The use method and the working principle of the embodiment are as follows:

firstly, the clamping mechanism is fixedly installed on a workbench of a vertical milling machine by using a bolt, then an adjusting nut 11 is rotated according to the diameter of a bolt ball 12, a circular truncated cone structure at the left end of a spreading pull rod 10 is driven to move left and right under the action of screw transmission in the spreading pull rod 10, so as to drive a three-jaw pressure rod 8 to spread outwards or contract inwards, meanwhile, the three-jaw pressure rod 8 is driven to move left and right under the action of the pressure of a wedge-shaped press block 9 to unload the pressure of the three-jaw pressure rod 8 during spreading or clamp the three-jaw pressure rod 8, further, the diameter of the opening of the three-jaw pressure rod 8 is adjusted according to the diameter of the bolt ball 12, then, a locking screw 5 is rotated, a fixed pressure plate 6 is driven to move left or right under the action of the internal screw transmission of the locking nut 3, the gap between the fixed pressure plate 6 and the three-jaw pressure rod 8 is adjusted, and then the bolt ball 12 is placed between the fixed pressure plate 6 and the three-jaw pressure rod 8, the locking screw 5 is continuously rotated to move inwards, and the fixed pressing plate 6 is driven to extrude the bolt ball 12 towards the right side, and the three-jaw pressure lever 8 is extruded to the right side through the force transmission until the wedge-shaped pressing block 9 on the three-jaw pressure lever 8 is completely attached to the inner wall of the adjusting sleeve 7, so that the bolt ball 12 is firmly clamped between the fixed pressing plate 6 and the bolt ball 12, the datum surface at the top of the bolt sphere 12 can then be machined, and when it is also desired to machine the datum surface at the bottom of the bolt sphere 12, the locking screw 5, the fixed pressing plate 6, the bolt ball 12, the adjusting sleeve 7 and the three-jaw pressure lever 8 can be driven to rotate 180 degrees together under the transmission action of the worm gear and the worm by rotating the adjusting mechanism 4, and the positioning and clamping are not required to be carried out again, so that the working efficiency of machining the bolt ball reference surface and the precision between the reference surfaces are effectively improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fixture for processing of bolt ball reference surface, includes installation base (1), its characterized in that: the left inner part of the installation base (1) is fixedly provided with a fixed sleeve (2), the inner part of the fixed sleeve (2) is movably sleeved with a locking nut (3), the fixed sleeve (2) is in transmission connection with the locking nut (3) through an adjusting mechanism (4), the inner part of the locking nut (3) is in threaded connection with a locking screw (5), the right end of the locking screw (5) is provided with a fixed pressing plate (6), the inner part of the right side of the installation base (1) is movably sleeved with an adjusting sleeve (7), the inner part of the adjusting sleeve (7) is movably sleeved with a three-jaw pressing rod (8), the outer surface of the three-jaw pressing rod (8) is provided with a wedge-shaped pressing block (9), the three-jaw pressing rod (8) is movably sleeved with the inner part of the adjusting sleeve (7) through the wedge-shaped pressing block (9), and the inner part of the three-jaw pressing rod (8) is movably connected with a spreading pull rod (10), the left end of strutting pull rod (10) connects the round pin contact with the left side of three-jaw depression bar (8) inner wall, the right side and the activity of strutting pull rod (10) surface cup joint the inside threaded connection of adjusting nut (11) on three-jaw depression bar (8) outside right side, the left end of strutting pull rod (10) is equipped with round platform structure, and the generating line inclination of round platform structure is the same with the inclination of three-jaw depression bar (8) inner wall, and the right-hand member of strutting pull rod (10) surface establishes to the helicitic texture and is connected with the inner wall screw thread transmission of adjusting nut (11), and the joint has bolt spheroid (12) between solid fixed pressing plate (6) and three-jaw depression bar (8).

2. The clamping mechanism for machining the bolt ball reference surface as claimed in claim 1, wherein the clamping mechanism comprises: the adjusting mechanism (4) adopts a worm gear transmission mode, and a group of rotating marks are arranged on the outer surface of the fixed sleeve (2) at intervals of 90 degrees.

3. The clamping mechanism for machining the bolt ball reference surface as claimed in claim 1, wherein the clamping mechanism comprises: the inside of fixed pressing plate (6) is equipped with indent curved surface structure, and what fixed pressing plate (6) adopted is that the rubber material preparation forms.

4. The clamping mechanism for machining the bolt ball reference surface as claimed in claim 1, wherein the clamping mechanism comprises: the inclination angle of the inner wall of the three-jaw pressure lever (8) is provided with a 15-degree angle, and the left end of the three-jaw pressure lever (8) is provided with an arc-shaped structure.