Into the design of group clamping apparatus and application

Current, promotion application receives on lathe, milling machine, drilling machine, grinder into group clamping apparatus and built up fixture. Develop the design of group clamping apparatus and application, to assuring product quality, shorten manufacturing preparation is periodic, managing cost, raised economic benefits to have positive effect, to our country industry development will rise to urge action goodly. Becoming set technology is the way of a kind of work that gets developing quickly inside domestic and international mechanical production domain in recent years. And becoming group fixture is to press group technique principle, in the spare parts in group on the foundation, be aimed at a group (or a few groups) a of similar spare parts (or a few) the fixture that working procedure designs. It has a certain number of characteristics of special fixture, have the adaptability that changes inside certain limits to workpiece feature again. This is in contend for an international market at present, make the product upgrades ceaselessly replacement, can make a product many breed, medium especially on the result that small lot production gets large quantities of quantities are produced, having the advantage that cannot compare. The analysis of 1 spare parts is handed in with what produce like some factory in group, housing of dc motive, dynamo, because the structure is simple, use 10 to seamless steel tube is machined and be become. This working procedure is the aperture inside half fine vehicle, its breed has 12 to plant. Axial length dimension most greatly 182+0.

23, the smallest for 90+0.

18: Stop a fixed position dimension most greatly Ø132-0.

087, the smallest for Ø71-0.

046, axial stops buccal length is uniform for 3. As a result of dimension paragraph apart is further, axial length considers pressing plate measure, its cent is two groups. Length of axial of Ⅰ group from 90 ～ 135, Ⅱ group is 140 ～ 182, stop because a fixed position dimension needs to change fixed position component no longer in group. Pick the part with same content of means of this kind of use machine tool, clamp, treatment come out, form what what need to become form process (if pursue,1 shows) . The design method that the 2 structures that become group fixture devise design of group clamping apparatus and special fixture is similar, but have stated specific aim, it is to be treatment certain geometry figure is similar, process and the spare parts with fixed position similar clamp and of the design. Still need to choose reasonable location when the design spare parts of fiducial, fixed position: Select part of appropriate clamping force, clamp: The design is very reasonable basic. Part drawing of housing of machine of graph 1 XF115 dc pursues 2 basic a graph 1.

Big pull rod 2.

Little draw bar 3.

Basic lever 4.

Locate dish of mat 5.

Space block 6.

Pressing plate pursues 3 into structure of group clamping apparatus 2.

1 fixed position is standard when making design plan with the choice of fixed position component, need to choose reasonable location spare parts of fiducial, fixed position. 1 workpiece is to in an attempt to exemple, Ø102-0.

07 place stop the mouth is fixed position fiducial, stop buccal plane is auxiliary fixed position. Clamping apparatus uses fixed position dish fixed position, such fixed position are standard as fiducial as the design coincide, without fiducial not coincide error. 2.

The chooses clamping force option of 2 clamp spare parts and clamping force, outside be being nodded except clamping force direction and action, make workpiece arises even as far as possible small clamp is out of shape, this is the main factor that chooses clamp spare parts and clamping force. This uses pressing plate impaction, generatrix of the circle outside workpiece of parallel of clamping force direction, clamp firm, workpiece holds correct position, prevented Bao Bi spare parts to install clip to be out of shape already, satisfied again into the requirement of the group. 2.

The airframe of requirement clamping apparatus with 3 basic clamping apparatus is the basis that becomes group fixture, when designing clamping apparatus airframe, divide outside should making sure the construction is reasonable, still should make sure clamping apparatus airframe has enough stiffness, and inside the limits in the likelihood, what do one's best can process spare parts form is all. To its matrix still answer the ground is similar an appearance, dimension, precision, semifinished product sort and its technique will decide basic an appearance, dimension, machine all likeness in order to satisfy requirement. This are basic a clamping apparatus structure that forms with spare parts of other clamping apparatus is compact, the operation is convenient, change the part is easy, the likeness that can process different product, (If pursue 2 are shown) , through its composition the aperture inside half fine vehicle becomes group clamping apparatus to be able to finish the aperture inside the housing that processes different product. 2.

If the graph is shown 3 times,4 housing have a structure into group clip, housing becomes group fixture by basic, exchange, 3 parts comprise standard component. This clamping apparatus by basic join with the machine tool, use machine tool can inspect particular case and decide. To assure workpiece axes and coincide of photograph of machine tool axes, use flange dish (transfer) with machine tool inner cone Kong Pei closes, the fixed position that finish. With clamping apparatus fixed position is relied on basic go up outside stop (this exemple is in for Ø240) , after exact location, give axial locking. Clamp uses ball of double pressing plate to wring impaction, by big pull rod 1 drive two little draw bar 2 will finish. Two little draw bar as exchange, in order to get used to section the two need that axial length differs in the group. The 3 error analysises that become group fixture and settle way 3.

Centre of turning circle of 1 machine tool and clamping apparatus installation are not coaxial right now, clamping apparatus breaks away from good position in the fixed position on the machine tool, cause mounting error. Solve method: ?

015. 3.

2 workpiece locate on clamping apparatus right now, fixed position breaks away from good place, generation processes error. The reason of generation is as follows: Fixed position spare parts makes out of tolerance: Gap of face of the fixed position between workpiece and fixed position spare parts is too big, or fixed position spare parts and machine tool main shaft are not perpendicular. Settle way: Ensure the spare parts makes precision, fixed position dish with matrix cooperate to be able to press tolerancepublic errand grade 5 class or 6 class precision. Clamping apparatus matrix on with fixed position spare parts cooperate a face to need to get on fine vehicle in the machine tool, after locating the spare parts is installed in order to ensure, be in proper place. The page before seeing pursues 2 in Ø120H6 and A of its end panel, make sure dimension public errand and precision ask. Fixed position dish inside hole size, take workpiece to stop Ø210 of size of the biggest maximum regards buccal part as basic measure, to raise fixed position precision, fixed position dish with stop of buccal part cooperate to take G7/h7. 4 last words are current, promotion application receives on lathe, milling machine, drilling machine, grinder into group clamping apparatus and built up fixture. Develop the design of group clamping apparatus and application, to assuring product quality, shorten manufacturing preparation is periodic, managing cost, raised economic benefits to have positive effect, to our country industry development will rise to urge action goodly. CNC Milling