CN106825181B - A kind of general rotation building mortion of conical thin-wall revolving meber - Google Patents

Abstract

The invention discloses a general spinning forming device for a conical thin-walled rotary part, which comprises a mandrel and a top block for pressing a blank. The mandrel is in the shape of a truncated cone, and the big end of the mandrel is fixedly connected with the main shaft of a spinning machine. , the small end of the mandrel is facing the top block, which is characterized in that a rotating mechanism is coaxially arranged on the top block, and two groups of symmetrically arranged spinning rod assemblies are hinged on the rotating mechanism, and the spinning rod assembly is connected with the spinning rod assembly in the spinning machine. The wheel frame is hinged; the advantage is that when the blank is spun, the line contact between the spinning rod assembly and the blank replaces the point contact between the spinning wheel and the blank in the traditional spun forming, and large drawing can be achieved. The one-time forming of the conical thin-walled rotary part with a deep ratio reduces the design cost and processing difficulty, and at the same time improves the production efficiency; in addition, the general spinning device can be directly installed and used without changing the existing structure of the spinning machine .

Description

A general rotation forming device for conical thin-walled rotary parts

technical field

The invention relates to a device for processing a circular sheet material into a conical thin-walled revolving part, in particular to a general-rotation forming device for a conical thin-walled revolving part.

Background technique

At present, the common spinning forming of conical thin-walled rotary parts is to press and fix the flat blank on the mandrel of the spinning machine through the top block, and press the blank through the rotary wheel to produce The most important feature of the conical thin-walled rotary parts obtained by local plastic deformation is that the thickness of the blank remains basically unchanged or slightly decreases during the forming process. However, when the deep drawing of the conical thin-walled rotary part to be formed is relatively large, it must be formed by multi-pass spinning, which increases the complexity of the motion track of the rotary wheel, makes processing difficult, and also reduces production efficiency.

Contents of the invention

The technical problem to be solved by the present invention is to provide a general rotary forming device capable of forming a tapered thin-walled rotary part with a large drawing ratio at one time, simple processing and high production efficiency.

The technical solution adopted by the present invention to solve the above technical problems is: a general rotation forming device for conical thin-walled rotary parts, including a mandrel and a top block for pressing the blank, the mandrel is in the shape of a truncated cone, and the The big end of the mandrel is fixedly connected with the main shaft of the spinning machine, the small end of the mandrel is facing the jacking block, and a rotating mechanism is coaxially arranged on the jacking block, and the rotating mechanism There are two groups of symmetrically arranged spinning rod assemblies on the upper hinge, and the spinning rod assemblies are hinged with the spinning wheel frame in the spinning machine.

Further, the rotating mechanism includes an outer ring, an inner ring, a cage and a plurality of rollers evenly embedded in the cage, the inner ring is coaxially arranged in the outer ring, The cage is arranged between the inner ring and the outer ring, the rollers are respectively in contact with the inner surface of the outer ring and the outer surface of the inner ring, and the An axial positioning mechanism is provided between the inner ring and the outer ring, and the inner ring is coaxially sleeved on the top block and has an interference fit with the top block. When the top block When pressing the blank, there is a gap between the end surface of the outer ring and the blank.

Further, when the top block is pressed against the blank, the gap between the end surface of the outer ring and the blank is 0.5-2mm.

Further, the mating surface of the inner ring and the top block is tapered, which facilitates the assembly between the top block and the inner ring, and facilitates the adjustment of the gap between the end surface of the outer ring and the blank.

Further, the axial positioning mechanism includes a positioning ring, the inner surface of the outer ring is provided with a positioning ring groove, the rollers are installed in the positioning ring groove, and the positioning ring groove The width matches the width of the roller, the outer surface of the inner ring is integrally provided with a positioning convex ring, the positioning convex ring is against one end of the roller, and the positioning ring is coaxial Sleeved on the inner ring and interference fit with the inner ring, the positioning ring is located at the other end of the roller.

Further, the spinning rod assembly includes a connecting rod and a roller, a hanging lug is fixedly arranged on the outer circumferential surface of the outer ring, and one end of the connecting rod is hinged to the hanging lug. The other end of the connecting rod is hinged to the wheel frame in the spinning machine, and the roller shaft is connected to the connecting rod and is parallel to the connecting rod.

Further, one end of the connecting rod is integrally provided with a first installation seat, and the first installation seat is provided with a blind hole for installation, and the two ends of the roller are respectively integrally provided with a connecting shaft. The connecting shaft at one end of the roller is installed in the blind installation hole through a bearing, and the other end of the connecting rod is integrally provided with a second mounting seat, and the second mounting seat is provided with a mounting through hole. The installation through hole is provided with a slot communicating with it, the connecting shaft at the other end of the roller is installed in the installation through hole through a bearing, and the outer end of the installation through hole is a threaded hole. A push rod is screwed in the threaded hole, and the push rod penetrates into the installation through hole and is opposed to the connecting shaft; this structure facilitates the disassembly and assembly of the roller on the connecting rod, and simultaneously passes The ejector pin prevents the axial movement of the roller on the connecting rod.

Compared with the prior art, the advantage of the present invention is that a rotating mechanism is coaxially arranged on the top block, and two groups of symmetrically arranged spinning rod assemblies are hinged on the rotating mechanism. The line contact between the rod assembly and the blank replaces the point contact between the rotary wheel and the blank in traditional general rotary forming, which can realize the one-time forming of conical thin-walled rotary parts with large drawing ratio, reducing design cost and processing difficulty, while improving production efficiency; in addition, the general spinning device can be directly installed and used without changing the existing structure of the spinning machine.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is the working state schematic diagram of the present invention;

Fig. 3 is the exploded schematic view of the rotating mechanism of the present invention;

Fig. 4 is the sectional view of rotating mechanism of the present invention;

Figure 5 is an exploded schematic view of the spinning rod assembly of the present invention;

Fig. 6 is a cross-sectional view of the spinning rod assembly of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in the figure, a general rotation forming device for conical thin-walled rotary parts includes a core mold 1 and a top block 2 for pressing a blank 100. The core mold 1 is in the shape of a truncated cone. The main shaft of the press (not shown in the figure) is fixedly connected, the small end of the mandrel 1 is facing the top block 2, and a rotating mechanism is coaxially arranged on the top block 2, and the rotating mechanism includes an outer ring 3, an inner ring 4, and a cage 5 And a plurality of rollers 6 evenly embedded in the cage 5, the inner ring 4 is coaxially arranged in the outer ring 3, the cage 5 is arranged between the inner ring 4 and the outer ring 3, and the rollers 6 are respectively connected to the outer ring 3 The inner surface of the inner ring 4 is in contact with the outer surface of the inner ring 4. An axial positioning mechanism is provided between the inner ring 4 and the outer ring 3. The axial positioning mechanism includes a positioning ring 11. The inner surface of the outer ring 3 is provided with a positioning ring groove (Fig. Not marked in ), the roller 6 is installed in the positioning ring groove, the width of the positioning ring groove matches the width of the roller 6, the outer surface of the inner ring 4 is integrally provided with a positioning convex ring 41, the positioning convex ring 41 and the roller One end of the column 6 is against each other, the positioning ring 11 is coaxially sleeved on the inner ring 4 and has an interference fit with the inner ring 4, the positioning ring 11 is located at the other end of the roller 6, the inner ring 4 is coaxially sleeved on the top block 2 and Interference fit with the top block 2, the mating surface of the inner ring 4 and the top block 2 is conical, when the top block 2 presses the blank 100, there is a gap between the end surface of the outer ring 3 and the blank 100, and the gap value is 0.5 ~2mm, two symmetrically arranged hanging lugs 31 are fixedly arranged on the outer circumferential surface of the outer ring 3, and a spinning rod assembly is hinged on the hanging lug 31, and the spinning rod assembly includes a connecting rod 7 and a roller 8, and the connecting rod One end of the connecting rod 7 is hinged with the hanging ear 31, and the other end of the connecting rod 7 is hinged with the wheel frame 10 in the spinning machine. One end of the connecting rod 7 is integrally provided with a first mounting seat 71, and on the first mounting seat 71 The installation blind hole 72 is provided, the two ends of the roller 8 are integrally provided with the connecting shaft 81 respectively, the connecting shaft 81 at one end of the roller 8 is installed in the installation blind hole 72 through the bearing 82, and the other end of the connecting rod 7 is integrally provided with the second Two mounting bases 73, the second mounting base 73 is provided with an installation through hole 74, the installation through hole 74 is provided with a slot 75 communicating with it, and the connecting shaft 81 at the other end of the roller 8 is installed in the installation through hole through a bearing 82 74, so that the roller shaft 8 is connected to the connecting rod 7 and parallel to the connecting rod 7, the outer end of the installation through hole 74 is a threaded hole 76, and the threaded hole 76 is screwed with a push rod 9, and the push rod 9 wears into the installation through hole 74 and against the connecting shaft 81.

In the above-mentioned embodiment, the installation process of the roller 8 on the connecting rod 7 is as follows: first, the bearing 82 is set on the connecting shaft 81 at one end of the roller 8, and then the connecting shaft 81 covered with the bearing 82 is installed on one end of the connecting rod 7 in the installation blind hole 72 of the roller 8, then pass the connecting shaft 81 at the other end of the roller 8 through the slot 75 and install it in the installation through hole 74 at the other end of the connecting rod 7, and then install the bearing 82 through the outer end of the installation through hole 74 Insert it on the connecting shaft 81, and finally the push rod 9 is screwed into the threaded hole 76 at the outer end of the installation through hole 74, so as to resist the connecting shaft 81 and prevent the roller shaft 8 from axially moving when it is working.

The forming process of the conical thin-walled rotary part by the general spinning forming device is as follows: the blank 100 is pressed tightly on the core mold 1 through the top block 2, as shown in Figure 1, the core mold 1 rotates rapidly under the drive of the spindle of the spinning machine , the blank 100 rotates with the mandrel 1 at the same speed under the tight pressure of the top block 2, while the outer ring 3 in the rotating mechanism does not move; at the same time, the role of the connecting rod 7 in the rotary frame 10 of the spinning machine Rotate downward around the lug 31 on the outer ring 3 at a small angular velocity. During the forming process, the roller 8 keeps in line contact with the blank 100. The blank 100 is gradually formed during the pressing process of the roller 8. At the same time, the roller 8 is passively rotated around its own axis under the friction of the blank 100. When the roller 8 reaches the position parallel to the generatrix of the mandrel 1, as shown in Figure 2, the connecting rod 7 no longer rotates downward, and the mandrel 1 continues to Rotate for a period of time to achieve the purpose of correcting the shape of the conical thin-walled rotary part 200.

Claims (7)

1. A general spinning forming device for a conical thin-walled rotary part, comprising a mandrel and a top block for compacting a blank, the mandrel is in the shape of a truncated cone, and the big end of the mandrel is connected to the spinning machine The main shaft is fixedly connected, and the small end of the mandrel is facing the top block, which is characterized in that: the top block is coaxially provided with a rotating mechanism, and the rotating mechanism is hinged with two groups of symmetrical The spinning rod assembly is provided, and the spinning rod assembly is hinged with the spinning wheel frame in the spinning machine. 2. A general rotation forming device for conical thin-walled rotary parts according to claim 1, characterized in that: said rotating mechanism includes an outer ring, an inner ring, a cage and a plurality of uniformly embedded in said The roller in the cage, the inner ring is coaxially arranged in the outer ring, the cage is arranged between the inner ring and the outer ring, and the roller are respectively in contact with the inner surface of the outer ring and the outer surface of the inner ring, an axial positioning mechanism is provided between the inner ring and the outer ring, and the inner ring is coaxially sleeved On the top block and in interference fit with the top block, when the top block is pressed against the blank, there is a gap between the end surface of the outer ring and the blank. 3. A general rotation forming device for conical thin-walled rotary parts according to claim 2, characterized in that: when the top block presses the blank, the distance between the end surface of the outer ring and the blank The gap value is 0.5-2mm. 4. The general-rotation forming device for conical thin-walled rotary parts according to claim 2, characterized in that: the mating surface of the inner ring and the top block is conical. 5. A general rotation forming device for conical thin-walled rotary parts as claimed in claim 2, characterized in that: said axial positioning mechanism includes a positioning ring, and the inner surface of said outer ring is provided with a positioning ring groove, the roller is installed in the positioning ring groove, the width of the positioning ring groove matches the width of the roller, and the outer surface of the inner ring is integrally provided with a positioning convex ring , the positioning convex ring is in contact with one end of the roller, the positioning ring is coaxially sleeved on the inner ring and has an interference fit with the inner ring, and the positioning ring is located on the the other end of the roller described above. 6. A general spinning device for conical thin-walled rotary parts as claimed in claim 2, characterized in that: said spinning rod assembly includes a connecting rod and a roller, and the outer peripheral surface of said outer ring Hanging ears are fixed on the top, one end of the connecting rod is hinged with the hanging ear, the other end of the connecting rod is hinged with the wheel frame in the spinning machine, and the roller shaft connected in the connecting rod and parallel to the connecting rod. 7. A general rotation forming device for conical thin-walled rotary parts as claimed in claim 6, characterized in that: one end of the connecting rod is integrally provided with a first mounting seat, and the first mounting seat is A blind hole for installation is provided, and a connecting shaft is integrally provided at both ends of the roller, and the connecting shaft at one end of the roller is installed in the blind hole for installation through a bearing, and the other end of the connecting rod A second mounting seat is integrally provided, and the second mounting seat is provided with a mounting through hole, and the mounting through hole is provided with a slot communicating with it, and the connecting shaft at the other end of the roller passes through the bearing Installed in the installation through hole, the outer end of the installation through hole is a threaded hole, the threaded hole is screwed with a push rod, and the push rod penetrates into the installation through hole And offset against the connecting shaft.