A clamp for processing thin-wall barrel and a clamping method thereof

Abstract

The invention discloses a clamp, in particular a clamp for processing thin-walled barrel bodies and a clamping method thereof, belonging to the technical field of thin-walled parts processing devices; the device comprises a base, and a plurality of annular plates arranged on the base, the plurality of annular plates are overlapped and assembled in sequence from bottom to top, and are connected into one through an assembly mechanism in the middle, the annular plates can be expanded outwards through the assembly mechanism, so that the circumferential outer sides of the annular plates are in contact with the inner side walls of the thin-walled barrel body and provide supporting force; the invention solves the problems of difficult processing and low processing precision of traditional thin-walled barrel body parts, with the aid of synchronous outward expansion of the clamp, a supporting force for fixing the thin-walled barrel body parts can be uniformly provided in the circumferential direction, and a barrel-shaped structure is formed due to the multi-layer design, so that the thin-walled barrel body parts receive uniform supporting force, and under the action of the supporting force, the thin-walled barrel body parts have better bearing capacity than traditional processing technology, and at the same time, the characteristic of easy deformation is improved.

Description

Technical Field

[0001] The invention relates to a clamp, in particular to a clamp used for processing a thin-wall barrel body and a clamping method thereof, belonging to the technical field of thin-wall component processing devices. Background Art

[0002] In the traditional processing technology, thin-walled barrel parts are processed. Due to the poor rigidity and processing properties of thin-walled parts, and the susceptibility to processing deformation and cutting vibration, there has always been great processing difficulty in the transmission processing. It is easy for the workpiece to be deformed during clamping or processing, and its processing accuracy is relatively low.

[0003] On the basis of traditional processing technology, it is necessary to improve the processing difficulty coefficient of thin-walled barrel parts by targeting the processing technology or using fixtures, fundamentally solve the problem, and promote the processing efficiency and processing accuracy of thin-walled barrel parts. Summary of the invention

[0004] The purpose of the present invention is to provide a fixture for processing thin-walled barrels in order to solve the above-mentioned problems. The fixture has the advantages of simple assembly, high processing efficiency and good precision.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A clamp for processing a thin-walled barrel body comprises a base and a plurality of annular plates arranged on the base. The plurality of annular plates are overlapped and assembled in sequence from bottom to top and connected into one body through an assembly mechanism in the middle. The annular plates can expand outward through the assembly mechanism so that the outer circumference of the annular plates contacts the inner wall of the thin-walled barrel body and provides supporting force.

[0007] Furthermore, the annular plate includes a plurality of fan-shaped petals, and the fan-shaped petals are connected by elastic connecting sheets.

[0008] Furthermore, there are gaps between adjacent fan-shaped petals so that the fan-shaped petals can expand outwards.

[0009] Furthermore, the middle of the annular plate has a wedge-shaped cavity for accommodating the assembly mechanism, and the surface of the assembly mechanism in contact with the annular plate is a wedge-shaped structure to achieve expansion of the annular plate.

[0010] Furthermore, the assembly mechanism includes an upper connecting block and a lower connecting block, and the upper connecting block is connected and assembled with the lower connecting block.

[0011] Furthermore, a mounting hole penetrating the upper connecting block is provided in the middle of the upper connecting block, and a threaded rod is provided on the top of the lower connecting block. The threaded rod passes through the mounting hole and is fastened by a nut.

[0012] Furthermore, the diameter of the end face of the lower connecting block facing the upper connecting block is smaller than the diameter of the other corresponding end face of the lower connecting block, and forms a wedge-shaped surface, and the wedge-shaped surface of the upper connecting block is in the opposite direction to the wedge-shaped surface formed by the lower connecting block.

[0013] Furthermore, the assembly mechanism also includes a gasket assembled between the annular plates, the middle of the gasket is hollow for accommodating the upper connecting block and the lower connecting block, and the circumferential side wall of the gasket is provided with a through hole along the axial direction of the gasket.

[0014] Furthermore, the pad has at least one group of circumferentially distributed through holes, and the annular plate has two groups of circumferentially distributed connecting holes. Bolts pass through the connecting holes of the upper annular plate of the two adjacent annular plates and then pass through the through holes to connect with the corresponding connecting holes of the lower annular plate to achieve assembly.

[0015] Furthermore, the base is provided with a connection hole corresponding to the annular plate, and the annular plate located close to the base is assembled and connected with the connection hole on the base after bolts pass through the connection hole of the annular plate.

[0016] A clamping method for processing a thin-wall barrel body comprises the following steps:

[0017] a. Place the lower connecting block on the base, place the thin-walled barrel, assemble the first annular plate on the base with a screw, assemble the upper connecting block, lift the lower connecting block by the action of the screw and the nut, and under the action of the wedge surface, the lower connecting block and the upper connecting block provide an outward extrusion force to the annular plate, so as to achieve center positioning and stabilize the thin-walled barrel under the action of the extrusion force;

[0018] b. Place a cushion block on the assembled annular plate, put the lower connecting block in the cushion block, put the second annular plate, and connect and assemble it with the unassembled connecting hole of the first plate by passing the screw through the connecting hole and the cushion block through hole, assemble the upper connecting block, lift the lower connecting block, and under the action of the wedge surface, the lower connecting block and the upper connecting block provide an outward extrusion force to the annular plate;

[0019] c. Repeat step b to assemble the last annular plate.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0021] The clamp for processing thin-walled barrel bodies and the clamping method thereof of the present invention solve the problems of difficult processing and low processing precision of traditional thin-walled barrel body parts. With the help of the clamp's synchronous outward expansion, a supporting force for fixing the thin-walled barrel body parts can be uniformly provided in the circumferential direction. Due to the multi-layer design forming a barrel-shaped structure, the thin-walled barrel body parts receive uniform supporting force. Under the action of the supporting force, the thin-walled barrel body parts have better bearing capacity than traditional processing technology, and at the same time, the characteristic of easy deformation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a schematic structural diagram of a cross section of the present invention;

[0024] Figure 3 This is a top view of the present invention after the thin-walled barrel is assembled;

[0025] Figure 4 This is a cross-sectional view of the present invention after the thin-wall barrel is assembled;

[0026] Figure 5 It is an assembly schematic diagram of the assembly mechanism of the present invention;

[0027] Figure 6 is a cross-sectional view of the assembly mechanism of the invention after assembly;

[0028] Figure 7 It is a schematic diagram of the enlarged structure of A of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the cushion block of the present invention.

[0030] Markings in the figure: 1-base, 2-annular plate, 21-fan-shaped petal, 22-connecting plate, 3-assembly mechanism, 31-upper connecting block, 32-lower connecting block, 33-pad, 4-thin-wall barrel body. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] Example

[0034] A fixture for processing thin-wall barrels, such as Figure 1-Figure 8As shown, it includes a base 1 and a plurality of annular plates 2 arranged on the base. The plurality of annular plates are overlapped and assembled in sequence from bottom to top, and are connected into a whole through an assembly mechanism 3 in the middle. The annular plates can expand outward through the assembly mechanism so that the outer circumference of the annular plates contacts the inner wall of the thin-walled barrel body and provides supporting force.

[0035] In this embodiment, the thin-walled barrel body 4 is clamped and positioned by means of a plurality of annular plates that can expand outward. In practical applications, the wall thickness of the thin-walled barrel body is thin. During the machining process, the external force will cause the workpiece to be processed to deform. The main purpose of the design using this method is to provide a supporting force from the inside to the outside for the workpiece to be processed on the circumference. Moreover, due to the supporting effect of the plurality of annular plates, its bearing capacity is effectively improved. On the basis of the original machining, the force generated by it will not cause the workpiece to be processed to deform. Usually, the height of the thin-walled barrel body is 0.6-1.5m in depth, which is very easy to achieve in actual operation.

[0036] Based on the design principle of the above specific embodiment, in another specific embodiment, the annular plate 2 includes a plurality of fan-shaped petals 21, and the fan-shaped petals are connected by elastic connecting sheets 22. In the design of this method, since the plurality of fan-shaped petals are independent structures and are connected by elastic elastic sheets 22, the fan-shaped petals are effectively provided with margin for outward expansion. As a more specific design, in order to ensure its expansion effect, there is a gap between adjacent fan-shaped petals 21. The main purpose of this method is to ensure the effect of being an independent individual.

[0037] As a more specific design, based on the design principle of the above specific embodiment, in one specific embodiment, the connecting piece 22 is an arc-shaped piece, and the shape of the arc is a square along the circumference of the thin-walled barrel member. As a specific design, to form an arc-shaped piece, the fan-shaped petals where the front and rear of the arc-shaped piece are located can be opened with arc-shaped through grooves or circular through grooves (such as Figure 7 As shown). Since the materials have certain rigidity and toughness, and the fixture is processed along with the workpiece to be processed, the expansion amount is not large. Therefore, the thin sheet structure can ensure the integrity of the entire annular plate and maintain the elasticity of the connecting sheet.

[0038] As a specific example, in order to reduce the weight of the entire fixture, a through hole groove is provided in the middle of the fan-shaped portion, and the thickness of the petal body around the through hole groove is smaller than the thickness of the fan-shaped petals around the periphery.

[0039] Based on the design principle of the above specific embodiment, in another specific embodiment, the middle of the annular plate 2 has a wedge-shaped cavity for placing the assembly mechanism, and the surface of the assembly mechanism in contact with the annular plate is a wedge-shaped structure to achieve the expansion of the annular plate. Fine-tuning can be performed through the cooperation of the wedge-shaped surface, and no wear will be caused to the relevant modules. To achieve expansion, at least one department must have a wedge-shaped surface. In order to ensure the effect and achieve cooperation between surfaces, wedge-shaped surfaces are used to cooperate with wedge-shaped surfaces.

[0040] As a more specific design, the structure is described in detail and implemented in its specific structure. In another specific embodiment, the assembly mechanism 3 includes an upper connecting block 31 and a lower connecting block 32, and the upper connecting block 31 is connected and assembled with the lower connecting block 32. More specifically, the lower connecting block is located below the annular plate, and the upper connecting block is located above the annular plate. Through the connection of the connecting blocks, the distance can be shortened and the annular plate can be squeezed.

[0041] As a more detailed design for the implementation of extrusion, in one specific embodiment, the middle of the upper connecting block 31 has an assembly hole that penetrates the upper connecting block, and the top of the lower connecting block is provided with a threaded rod, which passes through the assembly hole and is tightened by a nut. During the tightening of the nut, the spacing between the connecting blocks can be reduced, and the lower connecting block can be effectively lifted.

[0042] As a connecting block, how to make the annular plate have an extrusion force that expands outward? As a specific design, in another specific embodiment, the diameter of the end face of the lower connecting block 32 facing the upper connecting block is smaller than the diameter of the other corresponding end face of the lower connecting block, and a wedge-shaped surface is formed. The wedge-shaped surface of the upper connecting block 32 is in the opposite direction to the wedge-shaped surface formed by the lower connecting block. In a specific design, the inner side surface of the middle cavity of the annular plate forms a wedge-shaped surface corresponding to the connecting block. It can be seen from the accompanying drawings that the cross section of the wedge-shaped surface formed by the cavity in the middle of the annular plate is similar to an "I"-shaped structure. In the specific implementation, it is usually by means of the limit between the surface of the upper connecting block and the annular plate, and the lower connecting block is lifted upward by the action of the nut. Therefore, the force between the upper connecting block and the annular plate needs to be greater. In one specific embodiment, the slope of the wedge-shaped surface of the upper connecting block is greater than the slope of the wedge-shaped surface of the lower connecting block. Taking the figure as an example, the size of the slope is measured by the size of the wedge-shaped surface and the central axis.

[0043] Based on the design principles of the above specific embodiments, in another specific embodiment, the assembly mechanism also includes a pad 33 assembled between the annular plates, the middle of the pad is hollow to accommodate the upper connecting block and the lower connecting block, and the circumferential side wall of the pad is provided with a through hole along the axial direction of the pad. This method effectively enhances the function of the annular plate and has the advantages of optimizing the structure and reducing the weight. As a specific design, the inner diameter of the pad is larger than the outer diameter of the connecting block (the connecting block can move freely up and down in the hollow part of the pad when it is not assembled).

[0044] As for the design above, in order to achieve assembly, based on the integrity of the entire fixture, such as Figure 2 . Figure 4 , Figure 5 , Figure 6 As shown, in another specific embodiment, the pad 33 has at least one group of circumferentially distributed through holes, and the annular plate has two groups of circumferentially distributed connecting holes. The bolts pass through the connecting holes of the upper annular plate of the two adjacent annular plates and then pass through the through holes to connect with the corresponding connecting holes of the lower annular plate to achieve assembly.

[0045] As a further understanding of the above specific implementation:

[0046] (1) The cushion block 33 has one set of through holes distributed in a circumference, and the annular plate has two sets of connecting holes distributed in a circumference, and the diameters of the two sets of connecting holes on the annular plate are equal. In this case, the number of through holes is the sum of the number of the two sets of connecting holes and corresponds to the distribution of the connecting holes. When assembling, the connecting holes of the two adjacent annular plates use the two sets of connecting holes in an interlaced manner.

[0047] (2) The pad 33 has one group of through holes distributed in a circumference, and the annular plate has two groups of connection holes distributed in a circumference, and the diameters of the two groups of connection holes on the annular plate are not equal. In terms of distribution, two adjacent pads are distributed corresponding to the connection holes of the annular plate, and when in use, the through holes are cross-distributed (different for adjacent pads). At the same time, a pad is set in the middle of adjacent annular plates, and only one group of connection holes is passed through and corresponds to the through holes.

[0048] (3) The pad 33 has two groups of through holes distributed in a circumference, and the annular plate has two groups of connecting holes distributed in a circumference. The diameters of the two groups of connecting holes on the annular plate are not equal. The distribution mode and position of the through holes and the connecting holes on the pad are the same. When in use, the through holes are used crosswise. At the same time, a pad is set in the middle of adjacent annular plates, and only one group of connecting holes passes through and corresponds to the through holes.

[0049] Based on the design principle of the above specific embodiment, in another specific embodiment, the base is further provided with a connection hole corresponding to the annular plate, and the annular plate located close to the base is assembled and connected with the connection hole on the base after passing the bolt through the connection hole of the annular plate. Specifically, a mounting groove for assembling the lower connection block is also provided in the middle of the bottom plate, so that each annular plate can achieve the expansion effect.

[0050] As the above specific implementation, combined with different combinations and specific structural designs, as its use method, a clamping method for thin-wall barrel processing includes the following steps:

[0051] a. Place the lower connecting block on the base, place the thin-walled barrel, assemble the first annular plate on the base with a screw, assemble the upper connecting block, lift the lower connecting block by the action of the screw and the nut, and under the action of the wedge surface, the lower connecting block and the upper connecting block provide an outward extrusion force to the annular plate, so as to achieve center positioning and stabilize the thin-walled barrel under the action of the extrusion force;

[0052] b. Place a cushion block on the assembled annular plate, put the lower connecting block in the cushion block, put the second annular plate, and connect and assemble it with the unassembled connecting hole of the first plate by passing the screw through the connecting hole and the cushion block through hole, assemble the upper connecting block, lift the lower connecting block, and under the action of the wedge surface, the lower connecting block and the upper connecting block provide an outward extrusion force to the annular plate;

[0053] c. Repeat step b to assemble the last annular plate.

[0054] In the above steps, when the annular plate is not squeezed, the distance between the circumferential side and the inner wall of the thin-walled barrel is 0.5-2 mm. In the whole assembly, only a small variable is needed to achieve the clamping effect.

[0055] In summary, the clamp for thin-walled barrel body processing and the clamping method thereof of the present invention solve the problems of difficult processing and low processing precision of traditional thin-walled barrel body parts. With the help of the clamp's synchronous outward expansion, a supporting force for fixing the thin-walled barrel body parts can be uniformly provided in the circumferential direction. Due to the multi-layer design forming a barrel-shaped structure, the thin-walled barrel body parts receive uniform supporting force. Under the action of the supporting force, the thin-walled barrel body parts have better bearing capacity than traditional processing technology, and at the same time, the characteristic of easy deformation is improved.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixture for processing thin-wall barrels, characterized in that: It comprises a base (1), and a plurality of annular plates (2) arranged on the base, wherein the plurality of annular plates are overlapped and assembled in sequence from bottom to top and connected into one piece via an assembly mechanism (3) in the middle, and the annular plates can be expanded outwards via the assembly mechanism so that the outer circumference of the annular plates contacts the inner wall of the thin-walled barrel body and provides a supporting force; The annular plate (2) comprises a plurality of fan-shaped petals (21), wherein the fan-shaped petals are connected via elastic connecting sheets (22); The middle part of the annular plate (2) has a wedge-shaped cavity for accommodating an assembly mechanism, and the surface of the assembly mechanism in contact with the annular plate is a wedge-shaped structure to achieve expansion of the annular plate; The assembly mechanism (3) comprises an upper connection block (31) and a lower connection block (32), wherein the upper connection block (31) and the lower connection block (32) are connected and assembled; The middle of the upper connecting block (31) is provided with an assembly hole which penetrates the upper connecting block, and the top of the lower connecting block is provided with a threaded rod, which passes through the assembly hole and is fastened by a nut.

2. A fixture for processing thin-walled barrels as claimed in claim 1, characterized in that: The diameter of the end face of the lower connecting block (32) facing the upper connecting block is smaller than the diameter of the other corresponding end face of the lower connecting block, and forms a wedge-shaped surface. The wedge-shaped surface of the upper connecting block (32) is in the opposite direction to the wedge-shaped surface formed by the lower connecting block.

3. A fixture for processing thin-walled barrels as claimed in claim 1, characterized in that: The assembly mechanism also includes a cushion block (33) assembled between the annular plates, the middle of the cushion block being hollow for accommodating the upper connecting block and the lower connecting block, and a through hole is provided on the circumferential side wall of the cushion block along the axial direction of the cushion block.

4. A fixture for processing thin-walled barrels as claimed in claim 3, characterized in that: The cushion block (33) has at least one group of circumferentially distributed through holes, and the annular plate has two groups of circumferentially distributed connecting holes. Bolts pass through the connecting holes of the upper annular plate of two adjacent annular plates and then through the through holes to connect with the corresponding connecting holes of the lower annular plate to achieve assembly.

5. A fixture for processing thin-walled barrels as claimed in claim 4, characterized in that: The base is also provided with a connecting hole corresponding to the annular plate. The annular plate located close to the base is assembled and connected with the connecting hole on the base after bolts pass through the connecting hole of the annular plate.

6. A clamping method for processing a thin-walled barrel, applied to the clamp for processing a thin-walled barrel as claimed in claim 5, characterized in that: The following steps are involved: a. Place the lower connecting block on the base, place the thin-walled barrel, assemble the first annular plate on the base with a screw, assemble the upper connecting block, lift the lower connecting block by the action of the screw and the nut, and under the action of the wedge surface, the lower connecting block and the upper connecting block provide an outward extrusion force to the annular plate, so as to achieve center positioning and stabilize the thin-walled barrel under the action of the extrusion force; b. Place a cushion block on the assembled annular plate, put the lower connecting block in the cushion block, put the second annular plate, and connect and assemble it with the unassembled connecting hole of the first plate by passing the screw through the connecting hole and the cushion block through hole, assemble the upper connecting block, lift the lower connecting block, and under the action of the wedge surface, the lower connecting block and the upper connecting block provide an outward extrusion force to the annular plate; c. Repeat step b to assemble the last annular plate.

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