CN2357865Y

CN2357865Y - Eccentric trimming boring bar

Info

Publication number: CN2357865Y
Application number: CN 98235694
Authority: CN
Inventors: 舒邦辉
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-05-04
Filing date: 1998-05-04
Publication date: 2000-01-12
Anticipated expiration: 2008-05-04

Abstract

The utility model relates to a boring bar which is mainly composed of an eccentric sleeve, a cutter bar, etc. An eccentric method is utilized; when the cutter bar tool bar rotates in the eccentric sleeve, because an eccentric distance between a shaft line and a spindle line changes the distance of a cutting point and the spindle line, the purpose of fine adjustment is achieved. The boring bar has the advantages of simple structure, high intensity, convenient operation and high adjusting precision and is suitable for the rough machining and the fine machining of pore diameters of various nominal sizes.

Description

The eccentricity fine adjustment boring bar

The utility model relates to a kind of boring bar, especially a kind of eccentricity fine adjustment boring bar.

The used boring cutter of factory does not generally have accurately to regulate the device of the depth of cut, and the depth of cut is big during roughing, directly unclamps its clamping screw when regulating cutter and moves and get final product, and is easy and simple to handle.But can only take to knock the method that cutter moves its trace during fine finishining, not only time-consumingly take a lot of work but also easily go out defective work, so the micrometer adjustement boring tool of various distinct methods, boring bar continue to bring out for many years.Wherein the form with screw thread or screw thread differential differential tuning is maximum, but its shortcoming is: finely tune wire rod thread required precision height 1..2. regulate the easy damage of screw mandrel itself, influence precision as stressed member.Also there are some shortcoming in many adjustable boring tools and boring bar.As 1. because of adjustment structure takes up space can not the boring aperture.2. be unsuitable for roughing because of structural strength a little less than.3. complex structure.4. consumable accessory is arranged.As special train CN88200208U high accuracy eccentricity fine adjustment boring cutter device, only be applicable to the right boring operation that  30mm is above, consumable accessory eccentric bushing and ring gear are arranged.

It is a kind of that the utility model purpose is to provide: 1. thick, right boring need not changed boring bar.2. operate simple and easy.3. be suitable for the processing in multiple nominal dimension aperture.4. the boring bar of multiple superiority such as simple in structure, firm, no consumable accessory.Its trimming precision can reach in the monolateral 0.005mm.

Fine setting principle of the present utility model is to utilize eccentric method fine setting, promptly rotates in eccentric bushing with knife bar to change the distance of cutting point from main shaft.

This practicality newly be achieved in that the eccentricity fine adjustment boring bar mainly by eccentric bushing, knife bar, insert, alignment pin forms.The inner cylinder face axis and the main-shaft axis that it is characterized by eccentric bushing have eccentric throw.Knife bar closely cooperates at eccentric bushing inner cylinder face and eccentric bushing, and mating surface is smooth, rotates when being convenient to regulate.Eccentric bushing is provided with screw rod and hole, and knife bar is provided with insert groove and location key seat.Inserting, it is corresponding with screw rod on the eccentric bushing to be located in the groove of inserting, and transmits the thrust of screw rod to knife bar.Alignment pin is corresponding with the hole of eccentric bushing on location key seat, and only inserting in the hole when heavy boring is fixed on knife bar on the eccentric bushing, withdraws from during right boring.

The utility model has guaranteed the intensity of boring bar and the simplification of adjusting from structure, and knife bar is compacted back error very close to each other in eccentric bushing, the precision height.

Fig. 1 is the structure installation diagram of one of the utility model embodiment

Fig. 2 is the B-B cutaway view of Fig. 1

Fig. 3 is the A-A cutaway view of Fig. 2

Fig. 4 is the knife bar cutaway view of one of the utility model embodiment

Fig. 5 is a fine setting schematic diagram of the present utility model

The utility model is described in further detail below in conjunction with accompanying drawing.

Schematic diagram: O is a main-shaft axis as shown in Figure 5; O ₁Be knife bar axis, OO ₁Eccentric throw α is arranged, and C is with O ₁For on the circle in the center of circle a bit, AB is made as R for the knife bar diameter.As seen from the figure, cutting point C is with O ₁Its track constantly changes from the distance of main-shaft axis O when rotating for the center, is the appreciation curve from 0 ° to 180 °, is the depreciation curve from 180 ° to 0 °, and minimum of a value R/2-α is arranged in the time of 0 °, and maximum R/2+ α is arranged in the time of 180 °, and two values differ 2 α.C is indicated on the knife bar face of cylinder as the knife bar trimming scale from the variable in distance value of O.

The structure installation diagram of one of the utility model embodiment is as shown in Figure 1: eccentric bushing taper shank (21) joins with main shaft (22), inner cylinder face cooperates with knife bar (2) and joins, screw rod (4) compresses knife bar (2) by insert (3), and knife bar (2) is provided with location key seat (7), screw rod (15), hole (18) and scale (20).Cutter (14) is fixing by screw rod (15) in hole (18).As seen inserted and the axial cross section of the groove of inserting is trapezoidal by Fig. 1, Fig. 3, two trapezoidal side are fitted mutually, and are gapped between upper and lower bottom surface, and this structure can make knife bar (2) be subjected to fully compressing of screw rod (4), control it axially and tangential displacement.It is corresponding with screw rod (4) termination that (3) periphery of inserting is provided with screw nest (13), can locate when making insert (3) compacted.Alignment pin (6) is gone up corresponding with hole (11) at location key seat (7).By the visible alignment pin assembly structure of Fig. 1, Fig. 2.Location key seat has fluting (8), and alignment pin has jump ring groove (9), (10), and jump ring (12) is stuck in jump ring groove (9) or (10) in fluting (8), and the two states that alignment pin (6) is inserted or withdraws from hole (11) is spacing.Cutting force is bigger during heavy boring, and alignment pin (6) should be located into the insertion state.Exit status is gone at the less alignment pin of cutting force place during right boring, and list compresses knife bar by screw rod (4) and gets final product.Using method is as follows: alignment pin in the heavy boring process (6) is in the insertion state, clamping screw (4), and the coarse adjustment method of cutter is to compress after directly unclamping the mobile cutter of screw rod (15) (14) again.Alignment pin in the right boring process (6) is in exit status.Unclamping screw rod (4) during fine setting earlier, is handle rotation knife bar (2) with alignment pin (6), determines amount trimmed according to the scale on the knife bar face of cylinder (20), again clamping screw (4).

One of the utility model embodiment is knife bar as shown in Figure 4, it is characterized in that being provided with axial bit clamping hole (19), is convenient to change the cutter of different size and type.

Claims

1, a kind of eccentricity fine adjustment boring bar, mainly by eccentric bushing (1), knife bar (2), insert (3) and alignment pin (6) is formed, the inner cylinder face axis (16) that it is characterized in that eccentric bushing (1) has eccentric throw α with main shaft (22) axis (17), the face of cylinder and the eccentric bushing (1) of knife bar (2) in eccentric bushing (1) closely cooperates, eccentric bushing (1) is provided with screw rod (4) and hole (11), knife bar is provided with groove of inserting (5) and location key seat (7), insert (3) be located in the groove of inserting (5) correspondingly with screw rod (4), alignment pin (6) is corresponding with hole (11) on location key seat (7).

2, eccentricity fine adjustment boring bar according to claim 1 is characterized in that having cutter clamping hole (18) and screw rod (15).

3, eccentricity fine adjustment boring bar according to claim 1 is characterized in that being axially arranged with cutter clamping hole (19).

4, eccentricity fine adjustment boring bar according to claim 1 is characterized in that inserting (3) and the groove of inserting (5) axial cross section is trapezoidal, and two trapezoidal trapezoidal side are fitted mutually, and are gapped between last bottom, and the periphery of inserting is provided with screw nest (13).