CN202123346U

CN202123346U - Cylinder barrel inner hole rolling head

Info

Publication number: CN202123346U
Application number: CN2011201401398U
Authority: CN
Inventors: 李桂成
Original assignee: LIUZHOU SHUANGJI MACHINERY CO Ltd
Current assignee: LIUZHOU SHUANGJI MACHINERY CO Ltd
Priority date: 2011-05-05
Filing date: 2011-05-05
Publication date: 2012-01-25
Anticipated expiration: 2021-05-05

Abstract

The utility model discloses a cylinder barrel inner hole rolling head, comprising a core rod, a pressure bearing body, a roller frame installed outside the pressure bearing body and a plurality of rollers installed in the roller frame. The outer surface of the core rod is provided with an outer screw thread; the pressure bearing body is a cylindrical body which is connected with the outer screw thread of the core rod through an inner screw thread and has a conical outer side face, and a limiting pin is installed between the pressure bearing body and the core rod; the rollers are cylindrical, and the cylindrical face and two end faces of each of the rollers are in smooth transition; and the end face of the roller frame positioned on the small end of the pressure bearing body is connected with a bearing cover which is in embedded arrangement with an end head of the roller frame through a thrust bearing, and the other end of the bearing cover is provided with an adjusting nut installed outside the core rod. Compared with the prior art, the cylinder barrel inner hole rolling head can solve the problems that the conventional cylinder casing inner hole rolling head is easily damaged and has short service life.

Description

Cylinder barrel internal rolling head

Technical field

The utility model relates to the machine tools technical field, especially a kind of instrument that on lathe, is used for roll extrusion workpiece endoporus.

Background technology

The endoporus required precision of the parts of thread such as hydraulic cylinder or cylinder class is very high, and traditional handicraft adopts the process of right boring, fraising or honing to process mostly, but the endoporus precision of these its acquisitions of method still dislikes not enough.Therefore, people adopt the technology of roll extrusion to put forward the surface accuracy of doing this type workpiece endoporus.Having now at the instrument that is used for roll extrusion workpiece endoporus on the lathe mostly is to have a core bar that is used to be contained on the lathe; On this core bar, be provided with the outside and have the face of cylinder of bearing the roller crimping or the pressure-bearing body portion of taper seat, or independently being provided with one is fixedly connected with said core bar, the outside has the face of cylinder of bearing the roller crimping or the pressure-bearing body of taper seat; At the pressure-bearing extracorporeal set roller stand is arranged; Many rollers are housed in roller stand, this roller or be swelling-waist shape broad in the middle small in ends, or be the little bullet of the big end of an end; Even directly serve as with the needle roller in the needle bearing; This cylinder barrel internal rolling head, the former is easy to cause the roller middle part protuberance of its swelling-waist shape frayed and scrap, and the latter also can be easy at the big end of roller of bullet frayed and scrap.In the production practices of the bigbore hydraulic cylinder inner core face of processing, this cylinder barrel internal rolling head is frequently scrapped, and service life is short, not only makes processing cost increase, and influences production efficiency and product quality.

The utility model content

The utility model problem to be solved provides a kind of cylinder barrel internal rolling head, and this cylinder barrel internal rolling head can solve the problem that existing cylinder barrel internal rolling head damages easily and service life is short.

In order to address the above problem; The technical scheme that the utility model adopts is: this cylinder barrel internal rolling head includes the core bar that is used to connect lathe, and the pressure-bearing body is contained in the external roller stand of said pressure-bearing and is contained in a plurality of rollers in this roller stand; Said core bar outer surface is provided with external screw thread; Said pressure-bearing body is connected with said core bar external screw thread through internal thread, and lateral surface is the cylindrical body of taper seat, between said pressure-bearing body and the said core bar spacer pin is housed; Said roller is a cylinder, rounding off between its face of cylinder and two end faces; The end face that said roller stand is positioned at said pressure-bearing body small end one end is connected with a bearing cage with this roller stand termination setting-in through thrust bearing, and the other end of said bearing cage is provided with one and is contained in the outer adjusting nut of said core bar.

Owing to adopted such scheme, the utility model has following beneficial effect mutually with prior art:

1, because roller is used to bear the position of roll extrusion is the transition portion on the roller column end face and the face of cylinder; Even if this one is worn; Just can compensate the part that roller is worn through the adjustment adjusting nut; Therefore dependability improves greatly, is being used to process under the situation of same workpiece, is the cylinder barrel internal rolling head roller date of retirement that the utility model roller maintenance period is a cone for existing roller long? Doubly;

Even it is excessive that 2 roller pressure-bearing portions are worn, as long as these rollers are processed the round portion of leading of its face of cylinder and end face a little can be re-used, therefore the maintenance of this cylinder barrel internal rolling head is very convenient;

3, long service life; With the processing internal diameter is 200 millimeters; Length is that 1000 millimeters hydraulic cylinder is an example; The roller life-span of the cylinder barrel internal rolling head of existing employing drum-shaped roller is 500 hours, and the roller life-span of the cylinder barrel internal rolling head of existing employing cone-shaped roller is 800 hours, and the roller life-span of the cylinder barrel internal rolling head of the utility model is 5000 hours.

Description of drawings

Fig. 1 is the front view of the utility model embodiment.

The specific embodiment

Below in conjunction with the accompanying drawing instance the utility model is done further to detail:

Cylinder barrel internal rolling head shown in Figure 1 is made up of core bar 1, adjusting nut 2, bearing cage 3, thrust bearing 4, roller sleeve 5, pressure-bearing body 6, roller 7, roller lid 8 and spacer pin 9.Wherein core bar 1 is used for being connected with machining tool, and the lateral surface of core bar 1 is provided with screw thread, is installed with pressure-bearing body 6 on the screw thread of the lateral surface of core bar 1; Pressure-bearing body 6 is cylindrical bodies; It is connected with the external screw thread of core bar 1 through internal thread, and the lateral surface of pressure-bearing body 6 is a taper seat, is used to bear the pressure of roller 7; The pressure-bearing body 6 outer roller stands that connect and compose by roller sleeve 5 and roller lid 8 that are set with; In this roller stand, be provided with outside six greatly in little, prevent the roller holes that roller 7 drops out, a roller 7 is housed in each roller holes; Roller 7 is cylinders, rounding off between its face of cylinder and two end faces; Be positioned at pressure-bearing body 6 small ends one end at roller stand; It is the left end of roller sleeve 5; Thrust bearing 4 is housed, and the other end of thrust bearing 4 is equipped with a bearing cage 3, and the outer wall of bearing cage 3 is enclosed within outside the left end of roller sleeve 5; At the other end of bearing cage 3, promptly left end has the adjusting nut 2 of a spinning on core bar 1 screw thread among Fig. 1.This cylinder barrel internal rolling head in use; Be coated with spacer pin 9 between pressure-bearing body 6 and the core bar 1; Rotating adjusting nut 2 can pass through bearing cage 3, thrust bearing 4, roller sleeve 5 successively, drive roller 7 to figure right-of-center in political views side shifting; Roller 7 is changed by the effect meeting of the taper seat of pressure-bearing body 6 in the time of figure right-of-center in political views side shifting to the direction away from core bar 1 shaft core line, thereby can increase the roll extrusion diameter of cylinder barrel endoporus; After whole cylinder barrel internal rolling is accomplished, take out spacer pin 9, can let roller 7 to extruding from cylinder barrel to the direction change of core bar 1 shaft core line that withdraw from.

Claims

1. cylinder barrel internal rolling head; Include core bar, the pressure-bearing body is contained in the external roller stand of said pressure-bearing and is contained in a plurality of rollers in this roller stand; It is characterized in that: said core bar outer surface is provided with external screw thread; Said pressure-bearing body is connected with said core bar external screw thread through internal thread, and lateral surface is the cylindrical body of taper seat, between said pressure-bearing body and the said core bar spacer pin is housed; Said roller is a cylinder, rounding off between its face of cylinder and two end faces; The end face that said roller stand is positioned at said pressure-bearing body small end one end is connected with a bearing cage with this roller stand termination setting-in through thrust bearing, and the other end of said bearing cage is provided with one and is contained in the outer adjusting nut of said core bar.