CN109986092B

CN109986092B - Rotary positioning mechanism for pipe fitting machining

Info

Publication number: CN109986092B
Application number: CN201711483824.9A
Authority: CN
Inventors: 邓立伟
Original assignee: Chongqing Fenglin Intelligent Machinery Equipment Manufacturing Co ltd
Current assignee: Chongqing Fenglin Intelligent Machinery Equipment Manufacturing Co ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2020-09-08
Anticipated expiration: 2037-12-29
Also published as: CN109986092A

Abstract

The invention relates to a rotary positioning mechanism for pipe fitting machining, which comprises a steering mechanism and a clamping and positioning mechanism, wherein the steering mechanism is arranged on the upper end of the steering mechanism; the steering mechanism comprises a base, a transmission piece and a driving device, wherein the transmission piece is rotatably arranged at one end of the base, the driving device is arranged at the other end of the base and is used for driving the transmission piece to rotate, and the driving device comprises a plurality of first air cylinders and a transmission mechanism which are connected in series; the clamping and positioning mechanism comprises an upper chuck and a lower chuck which are arranged oppositely, an upper connecting rod penetrating through the upper chuck, an upper positioning block connected with the lower end of the upper connecting rod, a lower connecting rod with the lower end inserted into the lower chuck and a lower positioning block connected with the upper end of the lower connecting rod, the upper connecting rod can rotate around the axis of the upper connecting rod in the upper chuck, the upper end of the upper connecting rod is driven by a transmission part, the lower connecting rod can rotate around the axis of the lower connecting rod in the lower chuck, the axes of the upper connecting rod and the lower connecting rod are collinear, and the upper positioning block and the lower positioning block. The invention can greatly improve the production efficiency and the processing precision of processing tee joints and similar products.

Description

Rotary positioning mechanism for pipe fitting machining

Technical Field

The invention relates to a rotary positioning mechanism for pipe fitting machining.

Background

In the existing processing technique of the pipe joint tee joint and similar products (such as a two-way joint, a four-way joint and the like), each time one end of the tee joint is processed, a workpiece needs to be taken off from a machine tool and clamped on the machine tool again to process the other end. This method has the disadvantage that the first efficiency is low and the second machining precision cannot be fully guaranteed. If the machining of the tee joint can be completed only by clamping once without taking a workpiece, the production efficiency and the machining precision can be greatly improved. In order to overcome the disadvantages and greatly improve the production efficiency and the processing precision, a great deal of work is done by technical personnel in the field, but the effect is very little. Therefore, the existing processing technique for three-way and similar products has the disadvantages that the machine tool mechanism which can really and greatly improve the production efficiency and the processing precision is urgently needed to be provided.

Disclosure of Invention

In view of the above, the present invention is to provide a rotation positioning mechanism for pipe processing, which can greatly improve the production efficiency and processing precision of processing tee joints and similar products.

In order to achieve the purpose, the invention is realized by the following technical scheme: a rotation positioning mechanism for pipe fitting processing comprises a steering mechanism and a clamping positioning mechanism; the steering mechanism comprises a base, a transmission piece and a driving device, wherein the transmission piece is rotatably arranged at one end of the base, the driving device is arranged at the other end of the base and is used for driving the transmission piece to rotate, the driving device comprises a plurality of first air cylinders which are connected in series and a transmission mechanism which converts the linear motion of the first air cylinders into the rotary motion of the transmission piece, the first air cylinder close to the other end of the base is connected with the other end of the base, and the first air cylinder close to one end of the base is connected with the transmission mechanism; the clamping and positioning mechanism comprises an upper chuck and a lower chuck which are oppositely arranged, an upper connecting rod penetrating through the upper chuck, an upper positioning block connected with the lower end of the upper connecting rod, a lower connecting rod with the lower end inserted into the lower chuck and a lower positioning block connected with the upper end of the lower connecting rod, the upper connecting rod can rotate around the axis of the upper chuck, the upper end of the upper connecting rod is driven by the transmission part, the lower connecting rod can rotate around the axis of the lower chuck, the axes of the upper connecting rod and the lower connecting rod are collinear, and the upper positioning block and the lower positioning block are used for clamping workpieces; the upper connecting rod can move in the upper chuck along the axis direction of the upper connecting rod, a positioning protrusion is arranged at the upper end of the upper positioning block, a plurality of positioning holes matched with the positioning protrusion are formed in the upper chuck, a return spring is arranged between the upper chuck and the upper positioning block, the return spring is sleeved outside the upper connecting rod and positioned in an upper through hole, the upper end of the return spring is fixedly connected with the upper chuck, the lower end of the return spring is connected with a connecting sleeve, the connecting sleeve is rotatably connected with the upper end of the upper positioning block and can only rotate along the axis direction of the upper connecting rod, and the upper connecting rod and the transmission piece can be separated from each other and connected with each other.

Furthermore, the transmission part is a second cylinder, and the extending end of the second cylinder can drive the upper connecting rod to move downwards along the axial direction of the upper connecting rod and drive the rotating upper connecting rod to rotate along the axial direction of the upper connecting rod.

Furthermore, the upper connecting rod is detachably connected with the upper positioning block, and the lower connecting rod is detachably connected with the lower positioning block.

Further, drive mechanism includes that two rotate to set up band pulley on the base and tight cover in two the outside hold-in range of band pulley, one of them band pulley with second cylinder coaxial coupling, the hold-in range has two straightways, and one of them straightway is through a connecting block with one first cylinder is connected.

Furthermore, a first guide rail parallel to the axial direction of the first cylinder is arranged on the base, and the connecting block moves on the first guide rail.

Furthermore, steering mechanism still includes a base, sets up spout and third cylinder on the base, be equipped with the second guide rail on the base, the base by the drive of third cylinder makes the second guide rail slide in the spout, the second guide rail with first guide rail is parallel.

The invention has the beneficial effects that: the rotating and positioning mechanism for processing the pipe fitting can greatly improve the production efficiency and the processing precision of processing tee joints and similar products.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is an enlarged view of a portion a in fig. 1.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1, a rotating and positioning mechanism for pipe fitting machining includes a steering mechanism and a clamping and positioning mechanism.

The steering mechanism comprises a base 10, a transmission part 20 which is rotatably arranged at one end of the base 10 and a driving device 30 which is arranged at the other end of the base and is used for driving the transmission part to rotate, wherein the transmission part 20 is used for connecting a tee joint, a four-way joint and similar products, can be directly connected or indirectly connected, and aims to connect the tee joint, the four-way joint and the similar products to be steered with the steering mechanism. The driving device 30 includes a plurality of first cylinders 31 connected in series and a transmission mechanism for converting a linear motion of the first cylinders into a rotational motion of the transmission member, the first cylinder 31 near the other end of the base 10 is connected to the other end of the base 10, and the first cylinder 31 near the one end of the base 10 is connected to the transmission mechanism. When the product to be rotated is a straight pipe, the number of the first cylinders 31 connected in series is two; when the product to be rotated is a tee, the number of the first cylinders 31 connected in series is three; when the product to be rotated is a four-way valve, the number of the first cylinders 31 connected in series is four. The number of the first cylinders 31 corresponds to the number of times of the angle of rotation of the workpiece or product, each first cylinder 31 has a fixed stroke, and a plurality of first cylinders 31 are connected in series to have a plurality of different strokes, so that the steering requirement in the machining process of three-way products and similar products can be met, and the stroke of each first cylinder is fully utilized, so that the steering precision is high. The plurality of first cylinders 31 connected in series can be a plurality of cylinders connected in a straight line, namely, the axes are collinear; or at least the cylinder barrel parts of the two first cylinders are overlapped together, and the piston rods of the two first cylinders extend towards different opposite directions, so that the arrangement structure is more compact. Preferably, the first cylinder 31 of the cylinder barrel, which needs to be moved, is slidably connected to the base 10, so that the movement of the first cylinder 31 can be more accurate.

The clamping and positioning mechanism comprises an upper chuck 70 and a lower chuck 80 which are oppositely arranged, an upper connecting rod 71 which penetrates through the upper chuck, an upper positioning block 711 which is connected with the lower end of the upper connecting rod, a lower connecting rod 81 the lower end of which is inserted into the lower chuck 80 and a lower positioning block 811 which is connected with the upper end of the lower connecting rod, the upper chuck 70 and the lower chuck 80 are respectively fixed on two jaws which are oppositely arranged on a chuck, such as a pair of jaws which are oppositely arranged on a four-jaw chuck, an upper through hole 72 is formed on the upper chuck 70, a lower through hole 82 is formed on the lower chuck 80, the upper connecting rod 71 penetrates through the upper through hole 72, the lower connecting rod 81 extends into the lower through hole 82, the axes of the upper through hole 72 and the lower through hole 82 are collinear, the upper connecting rod 71 can rotate around the axis of the upper chuck 70, the upper end of the upper connecting rod 71 is driven by the transmission piece 20, namely, the lower connecting rod 81 can rotate around the axis thereof in the lower chuck 80, the axes of the upper connecting rod 71 and the lower connecting rod 81 are collinear, and the upper positioning block 711 and the lower positioning block 811 are used for clamping a workpiece.

The working principle is as follows: the base in the steering mechanism is fixed on a chuck box, an upper chuck and a lower chuck in a clamping and positioning mechanism are respectively fixed on two opposite clamping jaws of a four-jaw chuck, and then a workpiece is placed between an upper positioning block and a lower positioning block and clamped by the movement of the upper clamping jaws of the four-jaw chuck. Through the control of the control system on the machine tool, the chuck can be guaranteed to stop at the position where the upper connecting rod is kept vertical and the upper connecting rod is located at the upper end of the lower connecting rod each time, then the control system controls the action of the first cylinders, so that the transmission part rotates by an appointed angle, the transmission part drives the upper connecting rod to rotate, and the workpiece is clamped by the upper positioning block and the lower positioning block, so that the upper connecting rod also drives the workpiece to rotate by the appointed angle, and the rotation of the workpiece is realized.

As a further improvement of the above solution, the upper link 71 can move in the upper chuck 70 along its axis direction, that is, the upper link 71 can rotate in the upper through hole 72 and move along the axis direction of the upper through hole 72, the upper end of the upper positioning block 711 is provided with one positioning protrusion 7111, the upper end of the positioning protrusion 7111 is conical or spherical, the upper chuck 70 is provided with a plurality of positioning holes 73 matching with the positioning protrusions 7111, the positioning holes 73 are adapted to the positioning protrusions 7111, the positioning holes 73 are provided with a plurality of positioning holes 73, and an included angle of 90 ° is formed between two adjacent positioning holes 73 in the circumferential direction. A return spring 74 is arranged between the upper chuck 70 and the upper positioning block 711, the upper end of the return spring 74 is fixedly connected with the upper chuck 70, the lower end is connected with a connecting sleeve 75, the return spring 74 is sleeved outside the upper connecting rod 71 and is preferably located in the upper through hole 72, a boss 721 is arranged on the hole wall of the upper through hole 72 so as to connect the upper end of the return spring 74, the connecting sleeve is rotatably connected with the upper end of the upper positioning block and can only rotate along the axis direction of the connecting sleeve, the axis of the connecting sleeve is collinear with the axes of the upper through hole and the upper connecting rod, the lower end of the return spring is fixedly connected with the connecting sleeve, the upper connecting rod and the transmission piece can be in a detachable connection relationship, preferably, the transmission piece is a second air cylinder, the extending end (i.e. the piston rod) of the second cylinder can drive the upper connecting rod to move downwards along the axial direction of the upper connecting rod and drive the rotating upper connecting rod to rotate along the axial direction of the upper connecting rod. When the chuck rotates and stops at a position which enables the upper connecting rod to be kept in the vertical direction and is positioned right above the lower connecting rod, the clamping jaws of the four-jaw chuck drive the upper positioning block and the lower positioning block to be away from each other, a workpiece moves downwards to a certain distance along with the lower positioning block, then the piston rod of the second cylinder extends downwards and pushes the upper connecting rod downwards until the upper connecting rod is pushed to the upper positioning block to clamp the workpiece again, then the second cylinder drives the upper connecting rod to rotate by a specified angle (such as 90 degrees, 180 degrees and the like), then the piston rod of the second cylinder is retracted, the upper positioning block and the upper connecting rod move upwards together under the action of the reset spring, the positioning protrusions of the upper positioning block are embedded into the positioning holes corresponding to the upper chuck to form positioning fit, then the upper chuck and the lower chuck are relatively close to each other, when the upper positioning block and the lower positioning block clamp the workpiece again, the lower positioning block is aligned with the upper positioning block by manually rotating the position of the lower positioning block (manually adjusting the lower positioning block belongs to fine adjustment), and then the workpiece is clamped tightly. In order to avoid the trouble of manual adjustment and the reduction of efficiency caused by the manual adjustment, a guide rod is arranged on one side of the lower positioning block, the guide rod is preferably positioned at one corner of the lower positioning block, a guide sleeve is arranged on one side of the upper positioning block corresponding to one side of the lower positioning block, and the guide rod is inserted into the guide sleeve and can slide relative to the guide sleeve. After the positioning protrusion of the upper positioning block is embedded into the positioning hole of the upper chuck (at the moment, the position of the upper positioning block is very accurate) through the matching of the guide rod and the guide sleeve, the lower positioning block can also automatically rotate to the accurate position, and further the workpiece is clamped tightly.

As a further improvement of the above solution, the upper link 71 is detachably connected to the upper positioning block 711, and the lower link 81 is detachably connected to the lower positioning block 811, preferably, the detachable connection is a threaded connection.

As a further improvement of the above scheme, the transmission mechanism includes two pulleys 32 rotatably disposed on the base and a synchronous belt 33 tightly sleeved outside the two pulleys, one of the pulleys 32 is coaxially connected with the second cylinder, and the synchronous belt 33 has two straight segments, one of which is connected with one of the first cylinders through a connecting block 34. The transmission mechanism has the advantage of compact structure.

As a further improvement of the above solution, a first guide rail 11 parallel to the axial direction of the first cylinder 31 is provided on the base 10, and the connecting block 34 moves on the first guide rail 11. The first guide rail 11 is provided to guide the movement of the link block, so that the straight line segment on the timing belt 33 is more easily maintained in a straight state at all times.

As a further improvement of the above scheme, the steering mechanism further includes a base 40, a sliding groove 41 and a third cylinder 50, the sliding groove 41 and the third cylinder are disposed on the base, the second guide rail 12 is disposed on the base 10, the base 10 is driven by the third cylinder 50 to slide the second guide rail 12 in the sliding groove 41, and the second guide rail 12 is parallel to the first guide rail 11. The base 40 facilitates mounting of the entire steering mechanism on the chuck housing of a lathe and the third cylinder 50 increases the range of motion of the linkage for easier connection to a workpiece.

The base is also provided with electromagnetic valves 60 and electromagnetic valve seats 61, and the number of the electromagnetic valves 60 is equal to the sum of the number of the first cylinders 31, the number of the second cylinders and the number of the third cylinders. The electromagnetic valve is a necessary executive component for controlling the action of the cylinder by the control device.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a pipe fitting processing is with rotating positioning mechanism which characterized in that: comprises a steering mechanism and a clamping and positioning mechanism;

the steering mechanism comprises a base (10), a transmission piece (20) rotatably arranged at one end of the base and a driving device (30) arranged at the other end of the base and used for driving the transmission piece to rotate, wherein the driving device (30) comprises a plurality of first cylinders (31) which are connected in series and a transmission mechanism which converts the linear motion of the first cylinders (31) into the rotary motion of the transmission piece, the first cylinders (31) close to the other end of the base (10) are connected with the other end of the base (10), the first cylinders (31) close to one end of the base (10) are connected with the transmission mechanism, and the first cylinders (31) of the first cylinders (31) which need to move are connected with the base (10) in a sliding manner;

the clamping and positioning mechanism comprises an upper clamping head (70) and a lower clamping head (80) which are oppositely arranged, an upper connecting rod (71) penetrating through the upper clamping head, an upper positioning block (711) connected with the lower end of the upper connecting rod, a lower connecting rod (81) with the lower end inserted into the lower clamping head and a lower positioning block (811) connected with the upper end of the lower connecting rod, wherein the upper connecting rod (71) can rotate around the axis of the upper connecting rod in the upper clamping head, the upper end of the upper connecting rod (71) is driven by the transmission piece, the lower connecting rod (81) can rotate around the axis of the lower connecting rod in the lower clamping head, the axes of the upper connecting rod (71) and the lower connecting rod (81) are collinear, and the upper positioning block (711) and the lower positioning block (811) are used for;

the upper connecting rod (71) can move in the upper chuck along the axis direction of the upper connecting rod, a positioning protrusion (7111) is arranged at the upper end of the upper positioning block (711), a plurality of positioning holes (73) matched with the positioning protrusions are formed in the upper chuck (70), a return spring (74) is arranged between the upper chuck and the upper positioning block, the return spring (74) is sleeved outside the upper connecting rod, the upper end of the return spring (74) is fixedly connected with the upper chuck, the lower end of the return spring is connected with a connecting sleeve, the return spring (74) is sleeved outside the upper connecting rod (71) and is positioned in an upper through hole (72), the connecting sleeve is rotatably connected with the upper end of the upper positioning block and can only rotate along the axis direction of the upper connecting rod, and the upper connecting rod and the transmission piece can be in a detachable connection relationship.

2. The pipe fitting machining rotational positioning mechanism of claim 1, wherein: the transmission part (20) is a second air cylinder, and the extending end of the second air cylinder can drive the upper connecting rod to move downwards along the axial direction of the upper connecting rod and drive the rotating upper connecting rod to rotate along the axial direction of the upper connecting rod.

3. The pipe fitting machining rotational positioning mechanism of claim 2, wherein: the upper connecting rod (71) is detachably connected with the upper positioning block, and the lower connecting rod (81) is detachably connected with the lower positioning block.

4. The pipe fitting machining rotational positioning mechanism of claim 2, wherein: drive mechanism includes that two rotate to set up band pulley (32) on base (10) and tight cover in two hold-in range (33) outside the band pulley, one of them band pulley with second cylinder coaxial coupling, the hold-in range has two straightways, and one of them straightway passes through a connecting block (34) and one first cylinder is connected.

5. The pipe fitting machining rotational positioning mechanism of claim 4, wherein: the base (10) is provided with a first guide rail (11) parallel to the axial direction of the first cylinder, and the connecting block (34) moves on the first guide rail.

6. The pipe fitting machining rotational positioning mechanism of claim 5, wherein: steering mechanism still includes a base (40), sets up spout (41) and third cylinder (50) on the base, be equipped with second guide rail (12) on base (10), the base by the drive of third cylinder so that the second guide rail is in slide in the spout, the second guide rail with first guide rail is parallel.