CN110744150B

CN110744150B - Lathe suitable for processing internal thread

Info

Publication number: CN110744150B
Application number: CN201910998425.9A
Authority: CN
Inventors: 许晓波; 王庆国
Original assignee: Hebei Huafeng Energy Technology Development Co Ltd
Current assignee: Hebei Huafeng Energy Technology Development Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-07-28
Anticipated expiration: 2039-10-21
Also published as: CN110744150A

Abstract

The invention relates to a lathe suitable for processing internal threads, which comprises a spindle box, a chuck arranged on the spindle box, a fastener used for connecting the chuck and a pipeline, and a central frame used for supporting the pipeline; the fastener comprises a straight pipe part clamped by the chuck and a disc head part vertically arranged at one end of the straight pipe part and extending into the pipeline; the straight pipe part is internally screwed with a mandril, a plurality of positioning pins are movably inserted in the disc head part, the mandril can push the positioning pins to synchronously extend out of the disc head part, and the positioning pins extending out of the disc head part are matched to clamp a pipeline; the straight tube portion of fastener movably has cup jointed a tool rest section of thick bamboo on, is equipped with the lathe tool on the tool rest section of thick bamboo, and the tool rest section of thick bamboo can drive the lathe tool and remove along the axial direction of straight tube portion on the fastener for the inner wall of turning pipeline. The invention realizes the processing requirement on the internal thread on the inner wall of the pipeline, thereby expanding the types and specifications of the pipeline which can be suitable for turning by the lathe and having the function of reducing the processing cost of enterprises.

Description

Lathe suitable for processing internal thread

Technical Field

The invention belongs to the technical field related to lathes, and particularly relates to a lathe suitable for machining internal threads.

Background

A lathe is a machine tool for turning a rotating workpiece mainly with a lathe tool. Due to the reasons related to the production cost, an enterprise is usually provided with a lathe which is frequently used in a research and development workshop so as to be suitable for turning required by the enterprise during ordinary production and processing.

However, the enterprise is in the in-process of production research and development, if according to the demand of using, when needs are longer to length (for example, tens of meters, twenty-few meters 'length), and the inner wall of the great pipeline of pipe diameter is processed, be used for processing and forming the internal thread on the inner wall of pipeline, the chuck that is equipped with because of enterprise self can't realize pressing from both sides tight fixed to the pipeline of big pipe diameter, thereby can't realize the rotary drive to the pipeline, make the lathe that enterprise self was equipped with can't satisfy the processing demand of this type of contingency, make the enterprise need entrust the pipeline of treating processing to be exclusively used in the producer of processing the pipeline and process, because the whole size of the pipeline of treating processing is great, its transportation cost that corresponds is high, and look for other producer processing and also produce certain expense, thereby the processing cost that.

Disclosure of Invention

In view of the above, it is necessary to provide a lathe suitable for machining an internal thread in order to solve the technical problems in the prior art.

Concretely, the lathe is suitable for processing internal threads and used for processing and forming the internal threads on the inner wall of a pipeline; the pipeline clamping device comprises a spindle box, a chuck arranged on the spindle box, a fastening piece used for connecting the chuck and the pipeline, and a central frame used for supporting the pipeline; the fastener comprises a straight pipe part clamped by the chuck and a disc head part vertically arranged at one end of the straight pipe part and extending into the pipeline; the straight pipe part is internally screwed with a mandril, a plurality of positioning pins are movably inserted in the disc head part, the mandril can push the positioning pins to synchronously extend out of the disc head part, and the positioning pins extending out of the disc head part are matched to clamp the pipeline; the straight tube part of the fastener is movably sleeved with a tool rest cylinder, a turning tool is arranged on the tool rest cylinder, and the tool rest cylinder can drive the turning tool to move along the axial direction of the straight tube part on the fastener and is used for turning the inner wall of the pipeline.

Preferably, the centerline of the chuck, the centerline of the fastener, and the centerline of the pipe are collinear.

As a preferable scheme of the present invention, the turning tool has three tool tips, the three tool tips on the turning tool can alternatively extend out of the tool holder cylinder, and the lengths of the tool tips extending out of the tool holder cylinder are different from each other.

As a preferred scheme of the present invention, the turning tool is fixed to the tool rest cylinder by a screw, wherein a back cushion is fixed to the tool rest cylinder, and the turning tool abuts against the back cushion.

As a preferable scheme of the invention, a connecting rod is arranged on the tool rest cylinder, and a tool rest seat is fixed at one end of the connecting rod far away from the tool rest cylinder.

As a preferable scheme of the present invention, a conical head is disposed at an end of one side of the ejector rod facing the plurality of positioning pins, the plurality of positioning pins respectively have inclined surfaces matched with the conical heads, and the ejector rod can push the plurality of positioning pins to synchronously extend out of the disk head through cooperation between the conical heads and the inclined surfaces.

As a preferable aspect of the present invention, the number of the positioning pins is three, and the three positioning pins are uniformly distributed in the disc head.

As a preferable aspect of the present invention, the lathe further includes a rotation handle, the rotation handle penetrates through the chuck and is engaged with the ejector rod in the straight tube portion, and the rotation handle can drive the ejector rod to rotate in the straight tube portion.

As a preferable scheme of the present invention, the rotation handle is provided with a limit protruding column, the ejector rod is provided with a notch corresponding to the limit protruding column, and the rotation handle and the ejector rod can be circumferentially limited by the cooperation between the limit protruding column and the notch.

In a preferred embodiment of the present invention, the outer peripheral wall of the head of the disc on the fastener is fitted to the inner wall of the pipe.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the lathe suitable for machining the internal threads is simple in structure and convenient to operate and control, the chuck and the pipeline can be connected through the fastening piece, the concentricity of the connection between the chuck and the pipeline is ensured, the pipeline is rotationally driven when the lathe works, then the inner wall of the pipeline is turned through the turning tool on the tool cylinder frame, the machining requirement of the internal threads on the inner wall of the pipeline is met, the type and the specification of the pipeline which can be suitable for turning of the lathe are expanded, and the machining cost of enterprises is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a lathe suitable for machining an internal thread according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of the head of the disc on the fastener of the lathe of fig. 1 adapted for machining internal threads.

Fig. 3 is a schematic view of the assembly of the tool holder cylinder and the turning tool in the lathe suitable for processing internal threads in fig. 1.

10, a spindle box; 11. perforating; 20. a chuck; 30. a fastener; 31. a straight tube portion; 32. a disc head; 321. grooving; 33. a top rod; 331. a conical head; 34. positioning pins; 341. a bevel; 35. rotating the handle; 40. a center frame; 50. a tool holder cylinder; 51. turning a tool; 501. a knife tip; 52. a screw; 53. back cushion; 54. a connecting rod; 55. a tool holder mount; 200. a pipeline.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The lathe suitable for processing the internal thread is used for processing and forming the internal thread on the inner wall of the pipeline 200, so that the use requirement of enterprises is met.

Referring to fig. 1 to 3, a lathe for machining an internal thread according to an embodiment of the present invention includes a headstock 10, a chuck 20 mounted on the headstock 10, a fastening member 30 for connecting the chuck 20 and the pipe 200, and a center frame 40 for supporting the pipe 200.

The spindle head 10 is a main body structure of the lathe, and a through hole 11 is formed in a center position of the spindle head 10 and is used for driving the chuck 20 to rotate. It should be noted that the chuck 20 is a common three-jaw chuck, and the chuck 20, the headstock 10 and the center frame 40 are conventional structures of a currently existing lathe, and will not be described herein.

In the present embodiment, the fastening member 30 includes a straight tube portion 31 clamped by the chuck 20, and a disc head portion 32 vertically disposed at one end of the straight tube portion 31 and extending into the pipeline 200, wherein a push rod 33 is screwed in the straight tube portion 31, a plurality of positioning pins 34 are movably inserted in the disc head portion 32, and the push rod 33 can push the plurality of positioning pins 34 to synchronously extend out of the disc head portion 32, and the plurality of positioning pins 34 extending out of the disc head portion 32 cooperate to clamp the pipeline 200, so that the fastening member 30 in the present embodiment can be respectively connected and fixed with the chuck 20 and the pipeline 200, thereby realizing the relative fixation between the chuck 20 and the pipeline 200.

The outer circumferential wall of the disc head 32 of the fastener 30 fits the inner wall of the pipe 200, so as to improve the stability of the disc head 32 of the fastener 30 when assembled with the pipe 200, and the positioning pins 34 partially extend out of the disc head 32 to press against the pipe 200.

It can be understood that, in the present embodiment, when the fastening member 30 is fixedly connected to the chuck 20 and the pipe 200, respectively, the center line of the chuck 20, the center line of the fastening member 30, and the center line of the pipe 200 are collinear, so that the chuck 20 is driven by the spindle head 10 to rotate, and the pipe 200 can be driven by the fastening member 30 to rotate synchronously.

In the present embodiment, a conical head 331 is provided at an end portion of the top bar 33 facing the positioning pins 34, the positioning pins 34 have inclined surfaces 341 matching with the conical head 331, and the top bar 33 can push the positioning pins 34 out of the disc head 32 synchronously by engagement between the conical head 331 and the inclined surfaces 341.

The center point between the positioning pins 34 is set on the center line of the push rod 33, that is, the push rod 33 can be synchronously engaged with each positioning pin 34 when moving in the straight tube part 31, and each positioning pin 34 is synchronously pushed out of the disc head part 32 by the abutting engagement between the tapered surface of the tapered head 331 of the push rod 33 and the tapered surface 341 of the positioning pin 34. Since the disk head 32 abuts against the inner wall of the pipe 200, the portion of the disk head 32 pushed by the ejector 33 directly abuts against the inner wall of the pipe 200; in addition, the ejector rod 33 is screwed with the straight tube part 31, so that the ejector rod 33 can only move in the straight tube part 31 in a rotating manner, and the spacing fixation among the ejector rod 33, the positioning pins 34 and the pipeline 200 is realized.

In this embodiment, the number of the positioning pins 34 is three, and the three positioning pins 34 are uniformly distributed in the disc head 32, so that when the positioning pins 34 clamp the pipe 200, three clamping points are formed between the positioning pins 34 and the pipe 200, which has an effect of improving the stability when the positioning pins 34 clamp the pipe 200. It should be noted that the disc head 32 is provided with a slot 321 for accommodating the positioning pin 34, and each positioning pin 34 is correspondingly arranged in the slot 321 of the disc head 32 and can reciprocate along the slot wall of the slot 321. Of course, the number of the positioning pins 34 is not limited to three, and those skilled in the art can set the number of the positioning pins 34 to four, five, or even more according to the use requirement.

In a preferred embodiment of the present invention, the lathe further includes a turning handle 35, the turning handle 35 penetrates the chuck 20 and engages with the push rod 33 in the straight tube portion 31, and the turning handle 35 can rotate the push rod 33 in the straight tube portion 31. That is, in the present embodiment, the turning handle 35 can be used to rotationally drive the jack 33 in the straight tube portion 31.

Further, the rotation handle 35 penetrates through the through hole 11 of the spindle head 10, thereby facilitating the engagement of the rotation handle 35 with the spindle rod 33.

Specifically, a limiting convex column (not shown) is arranged on the rotating handle 35, a notch (not shown) corresponding to the limiting convex column is formed in the ejector rod 33, the rotating handle 35 and the ejector rod 33 can be circumferentially limited through the matching between the limiting convex column and the notch, so that the ejector rod 33 can be driven to rotate in the straight pipe portion 31 through the abutting matching between the limiting convex column and the notch groove wall while the rotating handle 35 rotates, and the ejector rod 33 can reciprocate in the straight pipe portion 31 along the axial direction of the straight pipe portion 31 by means of the threaded matching between the ejector rod 33 and the straight pipe portion 31. It should be noted that the limiting convex pillar may be configured as a cross-shaped structure, a semicircular structure, or other irregular structures, which will not be described herein.

In this embodiment, the straight tube portion 31 of the fastening member 30 is movably sleeved with a tool holder cylinder 50, the tool holder cylinder 50 is provided with a turning tool 51, the tool holder cylinder 50 can drive the turning tool 51 to move along the axial direction of the straight tube portion 31 of the fastening member 30 for turning the inner wall of the pipeline 200, and then the pipeline 200 is driven by the fastening member 30 to rotate at a high speed, so that the inner wall with one end open of the pipeline 200 can be machined and an internal thread can be formed. It should be noted that, when the tool holder cylinder 50 is sleeved on the straight tube portion 31 of the fastener 30, the tool holder cylinder 50 is in clearance fit with the straight tube portion 31, and the tool holder cylinder 50 is also rotatably connected with the straight tube portion 31, which may be specifically connected by a bearing (not shown).

The turning tool 51 is provided with three tool tips 501, the three tool tips 501 on the turning tool 51 can alternatively extend out of the tool holder barrel 50, and the lengths of the tool tips 501 extending out of the tool holder barrel 50 are different. When the lathe of the present embodiment is operated, the inner wall of the pipe 200 can be respectively turned by the tool tips 501 of the turning tools 51 having different lengths, thereby achieving the purpose of processing the internal thread on the inner wall of the pipe 200.

Specifically, the turning tool 51 of this embodiment is fixed on the tool rest barrel 50 through the screw 52, wherein the tool rest barrel 50 is fixed with the back cushion 53, and the turning tool passes through the screw 52 is fixed on the tool rest barrel 50, the turning tool 51 can abut against the back cushion 53, so as to ensure the stability of the turning tool 51 assembled on the tool rest barrel 50 when the turning tool 51 is turning the inner wall of the pipeline 200. It should be noted that the cross section of the turning tool 51 is a regular triangle, the screw 52 is fixed at the position of the central point of the turning tool 51, and the three tool tips 501 on the turning tool 51 are specifically formed as three angles on the turning tool 51, and specifically, the three tool tips 501 on the turning tool 51 can extend out of the tool holder barrel 50 at different distances by grinding the three angles on the turning tool 51 to different lengths. It should be noted that the fixing manner of the turning tools 51 on the tool holder cylinder 50 may be directly fixed by screws, and the number of the tool tips 501 on the turning tools 51 is not limited to three, and a person skilled in the art may adopt one turning tool to correspond to only one tool tip, and may equip three turning tools on the tool holder cylinder 50.

Further, a connecting rod 54 is arranged on the tool holder cylinder 50, and a tool holder seat 55 is fixed at one end of the connecting rod 54 far away from the tool holder cylinder 50, so that a user can move and drive the tool holder cylinder 50 on the straight pipe portion 31 by pushing the tool holder seat 55, and the tool holder cylinder 50 is further moved conveniently.

In summary, the lathe suitable for machining the internal thread provided by the invention is simple in structure and convenient to operate and control, the chuck and the pipeline can be connected through the fastener, the concentricity of the connection between the chuck and the pipeline is ensured, so that the lathe can rotationally drive the pipeline during working, then the inner wall of the pipeline is turned through the turning tool on the tool cylinder frame, the machining requirement on the internal thread on the inner wall of the pipeline is met, the type and specification of the pipeline which can be suitable for turning by the lathe are expanded, and the lathe has the effect of reducing the machining cost of enterprises.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express a few embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A lathe suitable for processing the internal thread, is used for processing and forming the internal thread on the inboard wall of the pipeline; the method is characterized in that: the pipeline clamping device comprises a spindle box, a chuck arranged on the spindle box, a fastening piece used for connecting the chuck and the pipeline, and a central frame used for supporting the pipeline; the fastener comprises a straight pipe part clamped by the chuck and a disc head part vertically arranged at one end of the straight pipe part and extending into the pipeline; the straight pipe part is internally screwed with a mandril, a plurality of positioning pins are movably inserted in the disc head part, the mandril can push the positioning pins to synchronously extend out of the disc head part, and the positioning pins extending out of the disc head part are matched to clamp the pipeline; the straight tube part of the fastener is movably sleeved with a tool rest cylinder, a turning tool is arranged on the tool rest cylinder, and the tool rest cylinder can drive the turning tool to move along the axial direction of the straight tube part on the fastener and is used for turning the inner wall of the pipeline.

2. A lathe adapted for machining internal threads according to claim 1 wherein: the centerline of the chuck, the centerline of the fastener, and the centerline of the pipe are collinear.

3. A lathe adapted for machining internal threads according to claim 2 wherein: the turning tool is provided with three tool tips, the three tool tips on the turning tool can extend out of the tool rest cylinder alternatively, and the length of each tool tip extending out of the tool rest cylinder is different.

4. A lathe adapted for machining internal threads according to claim 3 wherein: the turning tool is fixed on the tool rest barrel through a screw, wherein a back cushion is fixed on the tool rest barrel, and the turning tool abuts against the back cushion.

5. A lathe adapted for machining internal threads according to claim 4 wherein: the tool rest cylinder is provided with a connecting rod, and a tool rest seat is fixed at one end of the connecting rod far away from the tool rest cylinder.

6. A lathe adapted for machining internal threads according to claim 2 wherein: the positioning pin comprises a plurality of positioning pins and a push rod, wherein the end part of one side of the push rod, which faces the plurality of positioning pins, is provided with a conical head, the positioning pins are respectively provided with an inclined plane matched with the conical heads, and the push rod can push the positioning pins to synchronously extend out of the head part of the disc through the matching between the conical heads and the inclined planes.

7. A lathe adapted for machining internal threads according to claim 6 wherein: the number of the positioning pins is three, and the three positioning pins are uniformly distributed in the head part of the disc.

8. A lathe adapted for machining internal threads according to claim 2 wherein: the lathe further comprises a rotating handle, the rotating handle penetrates through the chuck and is matched with the ejector rod in the straight pipe portion, and the rotating handle can drive the ejector rod to rotate in the straight pipe portion.

9. The lathe adapted for machining an internal thread according to claim 8, wherein: the rotating handle is provided with a limiting convex column, the ejector rod is provided with a notch corresponding to the limiting convex column, and the rotating handle and the ejector rod can be circumferentially limited through the matching between the limiting convex column and the notch.

10. A lathe adapted for machining internal threads according to claim 9 wherein: the outer peripheral wall of the disc head on the fastener is attached to the inner wall of the pipeline.