Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of crankshaft grinding machine, is used for
Solve the problem that in prior art, grinding machine converted products quality stability is relatively low, bigger to artificial dependence.
For achieving the above object and other related purposes, the utility model provides techniques below scheme:
A kind of crankshaft grinding machine, crankshaft grinding machine, including bed body and the grinding carriage being arranged in described bed body X-direction, also include
Arranging centre frame on the table, described centre frame includes base, lower support arm and side support arm, is provided with on described base
For the centre bore as lever pivot point, described lower support arm and side support arm are respectively rotatably fixedly connected on described
On centre bore, described base is respectively equipped with one for regulating supported underneath governor motion and the use of described lower support arm angle
In the side support adjustment mechanism of the described side support arm of regulation, base is additionally provided with hydraulic jack, the work of described hydraulic jack
Stopper rod is connected on described lower support arm and side support arm, and described centre frame is on the table along the straight line at Z-direction place
Guide rail moves, and described grinding carriage is provided with emery wheel servo trimmer, and described grinding carriage in described bed body X-direction linearly
Guide rail moves.
Preferably, the top at described lower support arm and side support arm is respectively provided with one bracer, at described lower support arm
Form the strong point for supporting workpiece with side support arm top, including collateral support point and the lower strong point.
Preferably, the material of described bracer is diamond.
Preferably, described supported underneath governor motion includes cushion block and screw rod, and screw rod one end sequentially passes through and is located at cushion block
Through hole and the screw being located on base contact with described lower support arm, and the screw rod other end is socketed with a nut.
Preferably, described lower support arm is additionally provided with the spacer contacting with screw rod.
Preferably, the material of described spacer is alloy.
Preferably, the screw rod one end contacting with described lower support arm is cone, is located at the positioning on described lower support arm
Piece has the shrinkage pool of a cooperation described screw rod contact.
Preferably, hydraulic jack is fixed on base and withstands side support arm, the direction of motion of its piston rod with described under
Direction of rotation on centre bore is consistent with side support arm for support arm, and piston rod end is adjusted by attached below support of a spring
On the cushion block of joint mechanism.
Preferably, described centre frame is additionally provided with an external diameter on-line detector.
Preferably, the main shaft of grinding carriage is the structure of dynamic and static pressure main shaft.
As described above, the utility model has the advantages that the utility model uses the centre frame of hydraulic structure to take
For conventional bracer, it is achieved that follow the tracks of grinding, the major function of hydraulic pressure occurs without mistake circle during being to ensure that Crankshaft Machining, from
And improve product quality and stability.
Detailed description of the invention
By particular specific embodiment, embodiment of the present utility model being described below, those skilled in the art can be by this
Content disclosed by specification understands other advantages of the present utility model and effect easily.
Referring to Fig. 1, the utility model provides a kind of crankshaft grinding machine, including bed body 1 and be arranged on described bed body 1X direction 4
On grinding carriage 2, wherein, also include arranging centre frame 3 on the table, described centre frame 3 includes base the 31st, lower support arm
33 and side support arm 34, described base 31 is provided with for the centre bore 32 as lever pivot point, described lower support arm
33 and side support arm 34 be respectively rotatably fixedly connected on described centre bore 32, described base 31 is respectively equipped with a use
Prop up in supported underneath governor motion 35 and the side for regulating described side support arm 34 of described lower support arm 33 angle of regulation
Support governor motion 36, is additionally provided with hydraulic jack 37 on base 31, and the piston rod of described hydraulic jack 37 is connected to described
On lower support arm 33 and side support arm 34, described centre frame 3 moves along the line slideway at Z-direction 5 place on the table, this
Outward, described grinding carriage 2 is provided with emery wheel servo trimmer 6, and described grinding carriage 2 on described bed body 1X direction 4 linearly
Guide rail moves.
The aufbauprinciple of above-mentioned lathe is, we made line slideway into former hard guide rail, were three before grinding wheel spindle
Although the existing one-tenth dynamic and static pressure main shaft of piece watt, in order to emery wheel is in the stability of High Rotation Speed, we specially change emery wheel base 31
Structure, redesigns foundry casting, and former grinding wheel speed 800 revs/min, present rotating speed is 3000 revs/min, former sand
Wheel diameter is 900mm, is the CBN emery wheel of 550mm now, and former main axis is by Belt Drive, shakes very big;Now
Transformation of the way servomotor direct connection grinding wheel spindle (does not drive).Realize that high-speed cutting, process velocity are fast, fineness good, processing dimension
Stablize, efficiency is high, save cost of labor, can realize people's multimachine.
It in being embodied as, is respectively provided with one bracer 38 at the top of described lower support arm 33 and side support arm 34,
One strong point for supporting workpiece is formed on described lower support arm 33 and side support arm 34 top, including collateral support point and lower support
Point.Prop up bracer and can use diamond floating cushion block, can fit with surface of the work at any time.Super abrasive, best bright finish surface are not hindered
Surface of the work.
The operation principle of above-mentioned centre frame 3 is: by single hydraulic jack 37 simultaneously drive two strong points (collateral support point, under
The strong point), described lower support arm 33 and side support arm 34 are lever construction, are in the same centre of gyration, such that it is able to by adjusting
Joint supported underneath governor motion 35 and side support adjustment mechanism 36 regulate collateral support point and the lower strong point respectively.
In being embodied as, supported underneath governor motion 35 includes cushion block 352 and screw rod 351, and screw rod 351 one end is worn successively
Cross the through hole being located at cushion block 352 and the screw being located on base 31 contacts with described lower support arm 33, screw rod 351 other end overlaps
It is connected to a nut 353.Concrete, described lower support arm 33 is additionally provided with the spacer 310 contacting with screw rod 351, wherein, is somebody's turn to do
Spacer 310 uses alloy material.More specifically, screw rod 351 one end contacting with described lower support arm 33 is circular cone
Shape, the spacer 310 being located on described lower support arm 33 has the shrinkage pool of cooperation described screw rod 351 contact, so, by rotation
Turn screw rod 351 and can realize fixing to lower support arm 33.
In like manner, as the structure of side support adjustment mechanism 36 and supported underneath governor motion 35 are, repeat no more here.
Additionally, the concrete structure that hydraulic jack 37 is on base 31 is: hydraulic jack 37 is fixed on base 31 and withstands
Side support arm 34, the direction of motion of its piston rod and described lower support arm 33 and side support arm 34 direction of rotation on centre bore 32
Unanimously, and on the cushion block 352 by spring 39 support adjustment mechanism 35 attached below for the piston rod end, be so equivalent to by
Described lower support arm 33 and side support arm 34 clamp, thus realize that single hydraulic jack 37 simultaneously drives described lower support arm 33 and side
The purpose that support arm 34 rotates on centre bore 32.
In being embodied as, centre frame 3 is additionally provided with an external diameter on-line detector.
In being embodied as, the main shaft of grinding carriage 2 is the structure of dynamic and static pressure main shaft 7.
Concrete, grinding carriage 2 main shaft comparing existing general-purpose grinder uses three bearing shell designs, and lathe uses hydraulic pressure
Cylinder drives, and controls the feeding of grinding carriage 2 and workbench respectively with two oil cylinders.By workman according to the change manual manipulation of dial
Grinding machine, in-process measurement also has workman to use measuring instrument to carry out hand-guided.Grinding carriage 2 main shaft of numerically control grinder uses dynamic
Quiet main shaft instead of traditional bearing shell main shaft, is also adopted by digital control system control, with the mode generation of driven by servomotor ball screw
Replace traditional hydraulic oil cylinder driving.Servomotor built-in angular coding, by screw mandrel anglec of rotation feedback such as servo-drive system, passes through angle
And between screw lead correlation measuring and calculating workbench and grinding carriage move axially distance, servo-drive system can be to grinding machine simultaneously
Upper many different axles carry out coordinated signals, coordinate on-line measurement instrument, and linear grating realizes overall closed loop control sword to grinding machine.
Finally, the specific works principle of crankshaft grinding machine and existing structure, be referred to existing patent
201410447614.4 repeat no more here.
In sum, the utility model uses the centre frame 3 of hydraulic structure to instead of conventional bracer, it is achieved that follow the tracks of mill
Cutting, the major function of hydraulic pressure occurs without mistake circle during being to ensure that Crankshaft Machining, thus improves product quality and stability.