Installation method of ball screw support seat

Structure and installation of ball screw support seat.

There are 8 types of support seats, and standardized support seats are prepared for the shaft ends and finished products of standard ball screw stocks.

EK, EF, FK, FF type, standard support seat AK, AF, BK, BF type are prepared for general ball screws.

The fixed side is equipped with JIS 5 or P0 angular contact ball bearings with preload adjustment, which can be best matched according to the screw grade selected.

An economical fit.

High-precision and stable slewing performance.

Deep grooved ball bearings are used on the support side.

The internal bearings of the support seat type EK, BK, FK and AK contain an appropriate amount of lithium soap-based grease and are specially sealed. So.

These models are designed to last for a long time.

Installer. Install the support seat.

1) Install the fixed side to the screw.

2) Insert the fixing side, tighten the locking nut, and secure it with a spacer block and hexagon fixing bolts.

3) The bearing on the support side is fixed to the screw shaft with a stop ring, and the support seat on the support side is loaded.

Note 1: Do not disassemble the support unit.

Note 2: When the screw shaft is inserted into the support unit, be careful not to turn over the flange of the oil seal gasket.

Note 3: When pressing the spacer with the hexagon fixing bolt, apply the hexagon fixing bolt with adhesive before tightening it to prevent slackening.

Installation on the pedestal of the workbench.

1) When installing the ball screw nut on the workbench with the bearing, insert the nut into the support and tighten it temporarily.

2) Temporarily tighten the fixed side to the base.

In this case, please bring the table close to the fixed side support unit and align it with the center of the axis, and adjust the table to make the base move smoothly.

When using the fixed side as the reference, adjust the ball screw nut to maintain a certain clearance between the table or support.

When using the table as a reference, adjust it with a thin spacer (for an angle-type support unit) or between the outer surface of the nut and the inner surface of the mounting part.

Leave a certain amount of clearance (for round support seats) to adjust.

3) Place the workbench close to the fixed side support unit and align it with the center of the shaft, so that the workbench goes back and forth several times until the entire row of nuts is adjusted.

Cheng can move smoothly and temporarily tighten the support seat to the base.

Confirm the accuracy and fully tighten the support unit.

Use a dial indicator to test the swing and axial clearance of the shaft end of the ball screw and fully tighten the nut of the ball screw in order

Nut support, fixed side, support side.

Connection to the motor.

1).Install the motor mount to the base.

2).The motor will be connected to the ball screw with a coupling. (Pay attention to the installation accuracy).

3).Please take care to conduct adequate test runs.

The support method, bearing and installation method of the ball screw mechanism.

Ball screws. The pair is a spiral transmission element between the lead screw and the nut with a ball as the rolling element. There are a variety of structural types of ball screw pairs. According to the ball circulation mode, it is divided into external circulation and internal circulation.

Two categories. The ball screw pair is usually installed in the following ways:

1) Double push - free way, one end of the lead screw is fixed, and the end is free. The locating end bearings are also axial bearings.

Force and radial force. This type of support is used for short lead screws with small strokes.

2) double push - support mode, one end of the lead screw is fixed, and the other end is supported. Locking end bearings are subjected to both axial and radial forces; The bearing at the support end only bears radial force, and can make a small amount of axial floating, which can avoid or reduce the bending of the lead screw due to its own weight. At the same time, the thermal deformation of the lead screw can be freely extended to one end.

3) Double push - double push mode, both ends of the lead screw are fixed. The bearings at the lointing end can bear both axial force and radial force at the same time, and this support method can apply appropriate pretension to the lead screw, improve the support rigidity of the lead screw, and partially compensate for the thermal deformation of the lead screw.

4) The transmission mode of screw fixation and nut rotation is adopted, at this time, the nut rotates while moving axially along the fixed screw: Because the screw does not move, it can avoid being limited by the critical speed and avoid various problems when the slender ball screw runs at high speed. The nut has low inertia and flexible movement, and the achievable speed is high.

In this way, a large pretension can be applied to the lead screw, the stiffness of the lead screw support can be improved, and the thermal deformation of the lead screw can be compensated.

The two ends of the ball screw are connected by the bearing and the bearing housing, and then connected by the bearing housing and the equipment. Lead screw nuts are connected by flanges, keys or threads and nut seats. After the bearings are installed at both ends of the lead screw, the bearings are fixed with circlips or lock nuts.

Ball screw housing, specifications: BK10, BK12, BK15, BK17, BK20, BK25, BK30, BK35, BK40; bf10，bf12，bf15，bf17,bf20，bf25，bf30，bf35，bf40，ek06，ek08，ek10，ek12，ek15，ek20，ef06，ef08，ef10，ef12，ef15，ef20，fk06，fk08，fk10，fk12，fk15，fk17，fk20，fk25，fk30，ff06，ff10， FF12, FF15, FF17, FF20, FF25, FF30, WBK17DF, WBK20DF, WBK25DF, WBK25DFD, WBK30DF, WBK35DF, WBK35DFD, WBK40DF, WBK40DFD and other products. The special bearing housing for the lead screw is equipped with NSK bearings, and the performance and size are common with international brands THK, NSK, KURODA, SYK, Rexroth, GMT, etc., and can be replaced.

2. Special nut seat for ball screw: MC MGD MGS NH series special nut seat for ball screw, MGD series is equivalent to Rexroth, MC series is equivalent to THK. The NH and MGD series are closed type, and the MC series is open type.

3. There are six series of industrial robot linear modules: TKK industrial robot linear module, TKA industrial robot linear module, TKB industrial robot linear module, TKC industrial robot linear module, TKG industrial robot linear module, etc. The product size is common with HIWIN, PMI, NSK, THK, REXROTH, KURODA, IKO, NB, etc.

4. HZM series CNC workbench is composed of precision ball screw, cast iron and heavy-duty linear guide, which is suitable for heavy-load occasions.

5. CRU series crossed roller slide table, which is common with THK and IKO products.

It depends on what brand you can provide, and I can tell you which collections there are, their respective characteristics, and the occasions for which they are used.

1. Put the reference line from the template to the pit (the reference line is 2 3mm from the center of the end face of the guide rail), and fix it.

2. The pit is erected with a linear guide rail channel steel foundation, which must be leveled and solidified, and its horizontal error is not greater than 1 1000. After the position of the channel steel foundation seat is determined, it is filled and smoothed around it with mixed Haimanlu concrete. The angle steel frame used to fix the guide rail at both ends of the channel steel foundation is aligned with the guide rail reference line first, and then fixed.

The ball screw support seat is the bearing support seat that supports the connecting screw rod and the motor, and the support seat is generally divided into: fixed side (after adding K to indicate such as BK12) and support unit assembly (with F to represent such as BF12) They all have JIS 5 angular contact ball bearings with preload adjustment.

The ball screw support seat is equipped with an ultra-small angular contact ball bearing with a contact angle of 45° developed for ultra-small ball screws, which can achieve stable rotation performance with high rigidity and high precision.

The support unit on the support side uses deep groove ball bearings. The internal bearings of the support units such as the EK and BK types are filled with an appropriate amount of lithium soap-based grease and sealed with special sealing gaskets, which can be directly installed and used for a long time. The support unit is a small volume design that takes into account the space around the installation.

At the same time, the bearings with adjusted preload are installed, and they can be assembled directly after delivery, which not only reduces the assembly man-hours, but also improves the assembly accuracy.

AESS - 16 years committed to the development and manufacture of ultra-high precision ball screw support seat (ultra-high precision), guide shaft bearing, screw anti-loosening lock nut, linear module, precision slide table and other linear transmission components, the real source manufacturer, 15 consecutive years of service to Germany and Japan international large enterprises OEM, welcome OEM ODM service, AESS independent brand cooperation, etc.!

Product centerHigh product runout side tolerance, professional mass production of high-precision support seat series, guide shaft support series!

1.There are 8 types of support seats, and the standard support seat EK, EF, FK, FF type is prepared for the shaft end and finished product of standard ball screw inventory, and the standard support seat AK, AF, BK, BF type is prepared for general ball screw. Segment.

2.The fixed side is equipped with preload-adjusted JIS grade 5 or P0 angular contact ball bearings, which can be used to make the most economical combination according to the selected screw grade.

3.Deep grooved ball bearings are used on the support side.

4.The internal bearings of the EK, BK, FK and AK types of the support seat contain an appropriate amount of lithium soap-based grease and are specially sealed. So these models can be used for a long time.

Bead screw selection method:

1. Known conditions: UPH, worktable mass m1, stroke length ls, maximum speed vmax, acceleration and deceleration time t1 and t3, positioning accuracy + reciprocating motion cycle, clearance.

2. Select items: lead screw diameter, lead, nut model, accuracy, axial clearance, lead screw support mode, motor.

3. Calculation: 1Accuracy and type.

clearance, axial clearance), select the lead screw with the following clearance, and check the table to select the lead screw with a diameter of less than 32mm. 32mm clearance.

In order to satisfy the + rule, +

then x=+ must be selected

Lead accuracy of more than 300mm. Refer to the accuracy level of the lead screw, and select the C7 lead screw.

Lead screw type: Determine the type of lead screw according to the mechanism: rolling or grinding, positioning or transmissionYou can choose the screw rod of Shanghai Manlu

2.Leads. (Ball screw lead is determined by linear speed and rotational speed) lead and the maximum speed of the motor.

ph>=60*1000*v/(n/a)

1.）ph:

Screw lead mm

2.v: the predetermined maximum feed rate m s

3.n: The motor uses the rotational speed rpm

4.A: Reduction ratio.