CN102114588A - Dedicated rolling head for rolling super-long deep hole - Google Patents

Abstract

The invention discloses a special rolling head for super-long deep hole rolling, which includes a mandrel, and the mandrel is sequentially fitted with a cage, a first support sleeve, a second support sleeve and an adjustment sleeve; The roller is installed on the mandrel before the roller; the protective frame end cover is set on the mandrel before the roller; the first lock nut is installed on the mandrel before the protective frame end cover; the mandrel after the adjustment sleeve is installed There is a second lock nut. The rolling head of the present invention has a compact and reasonable structure, and long-term use shows that it is easy to adjust, has no working failure, has a long service life, high efficiency, simple maintenance, and is easy to guarantee the rolling process requirements.

Description

A special rolling head for super long deep hole rolling

technical field

The invention relates to a special rolling head for super long and deep hole rolling.

Background technique

For deep holes in steel parts that require high wear resistance, the ratio of the diameter of the deep hole to the length is greater than 5, such as the inner hole of the feed cylinder of a machine tool. The pre-process usually uses a special reamer to ream the hole, and the geometric accuracy of the inner hole after reaming Meet the design requirements, and then use chain cutting and honing and other technological means to process, but they all fail to meet the design requirements.

Contents of the invention

The object of the present invention is to provide a special rolling head for super long deep hole rolling. The rolling head of the present invention has a compact and reasonable structure, and long-term use shows that it is easy to adjust, has no working failure, has a long service life, high efficiency, simple maintenance, and is easy to guarantee the rolling process requirements.

In order to achieve the above object, the solution of the present invention is:

A special rolling head for ultra-long deep hole rolling, including a mandrel, on which a cage, a first support sleeve, a second support sleeve and an adjustment sleeve are sequentially set; Rollers are installed on the mandrel; a protective frame end cover is set on the mandrel before the roller; a first lock nut is installed on the mandrel before the protective frame end cover; a second locking nut is installed on the mandrel behind the adjustment sleeve. fasten the screw nut.

A first ball and a spring are sequentially installed between the cage and the spindle.

A third supporting sleeve is fitted on the mandrel between the first ball and the spring, and one end of the spring is fixedly connected with the third supporting sleeve, and the other end is fixedly connected with the first supporting sleeve.

A second ball is installed between the first support sleeve and the second support sleeve.

An anti-rotation pin is installed on the spindle between the second support sleeve and the adjustment sleeve.

The beneficial effects of the present invention are: for deep holes of steel parts with high wear resistance requirements, such as the inner hole of the feed cylinder of the machine tool, rolling processing is a commonly used method for the final processing of the inner hole in engineering practice, and its leading process usually adopts The hole is reamed with a special reamer. The geometric accuracy of the inner hole after reaming meets the design requirements. The purpose of rolling is mainly to strengthen and harden the surface of the inner hole through plastic deformation processing, thereby improving its wear resistance. In order to meet the technical needs of super long and deep hole rolling processing, the present invention designs a special rolling head with compact and reasonable structure. It has been proved by long-term use that it is easy to adjust, has no working failure, long life, high efficiency and easy maintenance. Simple, rolling process requirements are easy to guarantee.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

Example 1

；式中，Δd为a点直径增量，n为转动刻度格数，Δl _n 为每格移动量，a为锥心1/2锥角。保持架3(铜套) 前端铣通，底端应是球形，并保证各球底轴向准确的等高性和与滚柱端点的接触性，以保证各滚柱a点等径。滚柱2应进行多件精选分组，以保证直径尺寸、锥度的良好一致性，并进行精细的表面抛光。心轴11与滚柱2配合的锥部应保证很好的锥度精度、耐磨性、接触率，并保证配装滚柱2后具有0.5°的进给顺锥，以保证滚压力与进给方向相反，滚柱2反向定位稳定，避免出现滚柱2进给游动现象。调整套9对滚柱2最高点a回转直径的调整量Δd应控制在0.5～0.6mm范围内，不宜过大，否则会因调距过大使滚柱超越常磨区域，造成调整失真。保持架3(铜套)和各传动件外圆直径应始终小于滚柱2回转直径和被加工内孔直径，以保证滚压头正常工作。As shown in Figure 1, a special rolling head for ultra-long deep hole rolling includes a mandrel 11, on which a cage 3, a first support sleeve 5, a second support sleeve 6 and Adjustment sleeve 9; roller 2 is installed on the mandrel 11 before the cage 3; the mandrel 11 before the roller 2 is fitted with a protective frame end cover 1; the mandrel 11 before the protective frame end cover 1 A first lock nut 14 is installed on the top; a second lock nut 14 is installed on the mandrel 11 behind the adjustment sleeve 9, and the lock nut 14 is tightened. A first ball 13 and a spring 4 are sequentially installed between the cage 3 and the spindle 11 . A third support sleeve 12 is fitted on the spindle 11 between the first ball 13 and the spring 4 , and one end of the spring 4 is fixedly connected with the third support sleeve 12 , and the other end is fixedly connected with the first support sleeve 5 . A second ball 7 is installed between the first support sleeve 5 and the second support sleeve 6 . The first ball 13 and the second ball 7 are arranged and installed around the spindle 11 through grease (tallow). An anti-rotation pin 8 is installed on the spindle 11 between the second support sleeve 6 and the adjustment sleeve 9 . The first support sleeve 5, the second support sleeve 6, and the third support sleeve 12 are radially supported by the mandrel 11, and should have a more precise clearance fit with the mandrel 11. The supporting end surfaces of the first support sleeve 5, the second support sleeve 6, and the second ball 7 should have flatness requirements, and should have good perpendicularity to their respective inner holes, and the second ball 7 should have good dimensional consistency. In order to ensure the axial stability of this part during rotary motion. The second ball 7, the first ball 13 are lubricated with grease during work, and the roller is lubricated with machine oil during work. A corresponding dial is provided at the joint b of the support sleeve 6 and the adjustment sleeve 9 to represent the relationship between the scale rotation amount Δl and the highest point of the roller ( a point) rotation diameter increment Δd :

; where, Δd is the diameter increment of point a , n is the number of rotating scale divisions, Δl _n is the movement amount per division, and a is the 1/2 cone angle of the cone center. The front end of the cage 3 (copper sleeve) is milled through, and the bottom end should be spherical, and ensure the accurate axial contour of each ball bottom and the contact with the end points of the rollers, so as to ensure that the diameters of each roller point a are equal. Roller 2 should be selected and grouped in multiple pieces to ensure good consistency in diameter size and taper, and to carry out fine surface polishing. The taper part of the mandrel 11 and the roller 2 should ensure good taper accuracy, wear resistance and contact rate, and ensure that the roller 2 has a 0.5° feed forward taper to ensure the rolling force and feed The direction is opposite, and the reverse positioning of the roller 2 is stable, avoiding the phenomenon of the roller 2 feeding and swimming. The adjustment amount Δd of the adjustment sleeve 9 to the rotation diameter of the highest point a of the roller 2 should be controlled within the range of 0.5-0.6mm, and should not be too large, otherwise the roller will exceed the normal grinding area due to excessive adjustment distance, resulting in adjustment distortion. The diameter of the outer circle of the cage 3 (copper sleeve) and each transmission part should always be smaller than the rotation diameter of the roller 2 and the diameter of the processed inner hole to ensure the normal operation of the rolling head.

The present invention adjusts the adjustment sleeve 9 through the second lock nut 10, adjusts the roller 2 through the extrusion of the adjustment sleeve 9, when the adjustment sleeve 9 is adjusted to the left, until the highest point of the roller 2 is at the specified rolling pressure The interference amount (0.12～0.15mm) is within the range, and then locked by the lock nut 10. In this way, the second support sleeve 6 is squeezed, and then the second support sleeve 6 acts on the first support sleeve 5, and the first support sleeve 5 transmits the force to the cage 3, and the cage 3 acts on the roller 2, because the roller 2 is conical, so the roller 2 can move up and down under the action of external force, thereby realizing the rolling effect of holes of different sizes. When feeding, the roller 2 rolls the surface of the inner hole, the cage end cover 1, the cage 3, the spring 4, the first support sleeve 5, the third support sleeve 12 and the roller 2 rotate synchronously relative to the spindle 11, and its rotation The force comes from the backward thrust of roller 2. The roller 2 not only rolls relative to the tapered surface of the mandrel 11, but also rolls relative to the surface of the workpiece; the parts that rotate synchronously with the roller 11 are supported by the second ball 7 and the first ball 13 for axial rolling. After the feeding is finished (roller 2 rolls out), the knife is pulled back and the spring 4 is compressed under the action of the pull back, the roller 2 retreats toward the small head of the cone center, the outer diameter shrinks, and the work cycle is completed. The rolling head of this embodiment has a compact and reasonable structure. Long-term use shows that it is easy to adjust, has no working failure, long life, high efficiency, simple maintenance, and easy guarantee of rolling process requirements.

Claims (5)

1. the special-purpose milled head of ultralong deep hole roll extrusion is characterized in that: comprise axle (11), be set with retainer (3), first splicing sleeve (5), second splicing sleeve (6) on the described axle (11) successively and adjust cover (9); Described being positioned on retainer (3) axle (11) before is equipped with roller (2); Be set with fender bracket end cap (1) on roller (2) axle (11) before; On fender bracket end cap (1) axle (11) before first locking nut (14) is installed; Adjust on cover (9) axle (11) afterwards second locking nut (14) is installed.

2. the special-purpose milled head of a kind of ultralong deep hole roll extrusion as claimed in claim 1 is characterized in that: first ball (13) and spring (4) are installed between described retainer (3) and the axle (11) successively.

3. the special-purpose milled head of a kind of ultralong deep hole roll extrusion as claimed in claim 2, it is characterized in that: also be set with the 3rd splicing sleeve (12) on the axle (11) between described first ball (13) and the spring (4), and spring (4) one ends and the 3rd splicing sleeve (12) are connected, and the other end and first splicing sleeve (5) are connected.

4. the special-purpose milled head of a kind of ultralong deep hole roll extrusion as claimed in claim 1 is characterized in that: between described first splicing sleeve (5) and second splicing sleeve (6) second ball (7) is installed.

5. the special-purpose milled head of a kind of ultralong deep hole roll extrusion as claimed in claim 1 is characterized in that: on the axle (11) between described second splicing sleeve (6) and the adjustment cover (9) stop pin (8) is installed.

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