Cylinder inner diameter rounding jig

Abstract

The utility model relates to the technical field of rounding jigs, and discloses a cylinder inner diameter rounding jig which comprises a fixing assembly, a shaping assembly, a transmission assembly and a limiting assembly. The shaping assembly is connected with the fixing assembly through a through hole in the center of the fixing assembly, the transmission assembly is arranged in the shaping assembly and comprises a stepped shaft connected with the shaping assembly in a penetrating mode, and one end of the stepped shaft is connected with the power mechanism. The shaping assembly slides in the axial direction of the fixing assembly. The limiting assembly is arranged on the shaping assembly and elastically connected with the shaping assembly. Through the shaping assembly capable of sliding in the axial direction, the outer shaping sleeve structure which is linked with the conical shaft and can expand and contract in the radial direction, and the limiting assembly with the elastic limiting function, the shaping process of the inner diameter of a cylinder can be controlled, and meanwhile it is ensured that rapid resetting can be achieved after the rounding procedure is completed; when the device is applied to an automatic production line, the rounding efficiency is improved, and the inner diameter roundness precision of the cylinder is greatly improved in structural design.

Description

TECHNICAL FIELD

[0001] The utility model relates to a whole circle jig technical field, more specifically, relate to a cylinder inner diameter whole circle jig. BACKGROUND

[0002] The cylinder barrel is a cylindrical structure, and the forming of the cylindrical structure is realized by coiling a thin steel plate through a coiling device. During the processing, the steel plate is deformed through repeated rolling of the coiling machine, and gradually becomes a cylindrical structure, and then the two ends of the thin steel plate are welded to complete. Although the overall cylinder is in a circular structure, in fact, due to the limitation of the processing method, the lap joint surface of the finally generated cylindrical structure is actually a small plane. Due to the influence of the coiling device precision, the roundness precision of many cylindrical structures is low after final forming, and cannot meet the processing requirements. Therefore, after the cylindrical structure is processed by the coiling device, the roundness precision of the finally formed cylinder is usually subjected to secondary whole circle, and after the secondary whole circle of the inner diameter of the cylinder, the roundness precision of the inner diameter of the cylinder is continuously detected.

[0003] In the prior art, the cylindrical structure such as the cylinder barrel is usually formed by coiling a thin steel plate through a coiling device. Although the cylinder is close to a circle as a whole, due to the limitation of the device precision and the processing method, the roundness precision is usually not high, and it is difficult to meet the needs of high-precision application scenarios. For example, a pipe expanding die with a die sheet adjusting structure is disclosed in patent CN114472719B, which applies a radial expansion force to the inner wall of the cylinder through cooperation of multiple die sheets and an inner telescopic mechanism, thereby improving the roundness precision.

[0004] However, the number of die sheets in the device is 8, and after multiple whole circles, the wear degree of each die sheet is different due to uneven stress, thereby affecting the whole circle effect. In addition, it is found in the production process that as the production demand changes, the roundness precision of the workpiece whole circle by the device cannot meet the new production demand, and further improvement of the roundness precision is required by improving the device structure. UTILITY MODEL CONTENTS

[0005] The utility model discloses a cylinder inner diameter whole circle jig to overcome the roundness precision of the workpiece whole circle of the prior art cannot meet the new production demand defect.

[0006] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0007] A cylinder inner diameter whole circle jig, comprising a fixing assembly, a shaping assembly, a transmission assembly and a limiting assembly.

[0008] The center of the fixing assembly is provided with a through hole, and the shaping assembly is connected with the fixing structure through the through hole in the center of the fixing assembly.

[0009] The transmission assembly is arranged inside the shaping assembly, comprising a stepped shaft connected with the shaping assembly, one end of the stepped shaft being connected with a power mechanism; the shaping assembly is capable of moving along the axial direction of the fixed assembly;

[0010] The limiting assembly is arranged on the shaping assembly and is elastically connected with the shaping assembly.

[0011] Further, the fixed assembly comprises an upper fixed unit and a lower fixed unit connected in sequence from top to bottom;

[0012] The upper fixed unit comprises an upper fixed seat provided with a plurality of first mounting holes and a plurality of first through holes; the lower fixed seat unit comprises a lower fixed seat provided with a plurality of second mounting holes corresponding to the first mounting holes and a plurality of second through holes corresponding to the second through holes;

[0013] Further, the inner diameter circumference of the upper fixed seat is fixedly connected with an inlay for increasing strength.

[0014] Further, the shaping assembly comprises an outer shaping sleeve and a taper shaft; the outer shaping sleeve is a ring-shaped cylindrical structure enclosed by n shaping blocks, the taper shaft is sleeved in the outer shaping sleeve and is in sliding connection with the outer shaping sleeve.

[0015] Further, the outer surface of the shaping block is a circular arc, the inner surface of the shaping block facing the taper shaft is a slope, and the inner surface of the shaping block is provided with a first key groove;

[0016] The outer surface of the taper shaft comprises a second key groove corresponding to the first key groove;

[0017] The shaping assembly further comprises a flat key arranged between the first key groove and the second key groove.

[0018] Further, the end of the outer shaping sleeve is respectively provided with a first annular groove and a second annular groove, the longitudinal section of the shaping block is L-shaped, and the lower end of the outer shaping sleeve enclosed by the plurality of shaping blocks forms a ring-shaped boss.

[0019] Further, the limiting assembly comprises a first limiting rubber ring arranged at the circumferences of the first annular groove and the second annular groove for maintaining the expansion range of the outer shaping sleeve;

[0020] Further, the limiting assembly comprises a first limiting rubber ring arranged at the circumferences of the first annular groove and the second annular groove for maintaining the expansion range of the outer shaping sleeve;

[0021] The first limiting rubber ring and the second limiting rubber ring are both used for maintaining the position stable during the radial expansion or contraction of the outer shaping sleeve.

[0022] Further, the limiting assembly further comprises a limiting sleeve for keeping the taper shaft from moving in the axial direction; the limiting sleeve is arranged in the taper shaft and is located at the end of the taper shaft that is contracted in the axial direction.

[0023] Further, the upper end of the taper shaft is further provided with a limiting block for axially limiting the taper shaft; the limiting block is provided with a connecting hole in the middle and is arranged in the taper shaft through the connecting hole.

[0024] Compared with the prior art, the beneficial effects of the technical scheme of the utility model are:

[0025] The utility model relates to the technical field of whole circle jigs, and comprises a fixing assembly, a shaping assembly, a transmission assembly and a limiting assembly, the transmission assembly is arranged in the inside of the shaping assembly and comprises a stepped shaft which is connected with the shaping assembly, one end of the stepped shaft is connected with a power mechanism, the shaping assembly can slide along the axial direction of the fixing assembly, the limiting assembly is arranged on the shaping assembly and is elastically connected with the shaping assembly. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the whole structure schematic diagram of the utility model embodiment cylinder inner diameter whole circle jig;

[0027] Figure 2 It is the structure schematic diagram of the utility model embodiment fixing assembly;

[0028] Figure 3 It is the structure schematic diagram of the utility model embodiment lower fixing seat;

[0029] Figure 4 It is the front view of the utility model embodiment cylinder inner diameter whole circle jig;

[0030] Figure 5 It is the front view of the utility model embodiment limiting assembly;

[0031] Figure 6 It is the structure schematic diagram of the utility model embodiment limiting assembly;

[0032] Figure 7 It is the inside schematic diagram of the utility model embodiment shaping assembly;

[0033] Figure 8The internal schematic view of the outer shaping sleeve of the embodiment of the utility model;

[0034] Figure 9 The assembly front structure schematic view of the embodiment of the utility model;

[0035] 1, fixed assembly;101, upper fixed seat;1011, first mounting hole;1012, first through hole;102, lower fixed seat;1021, second mounting hole;1022, second through hole;103, insert;

[0036] 2, shaping assembly;201, outer shaping sleeve;2011, first key groove;2012, first annular groove;2013, second annular groove;2014, annular boss;202, taper shaft;2021, second key groove;203, flat key;

[0037] 3, transmission assembly;301, stepped shaft;

[0038] 4, limiting assembly;401, first limiting rubber ring;402, second limiting rubber ring;403, limiting sleeve;404, limiting block. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of protection of the present application.

[0040] Unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by those with ordinary skills in the art to which the present application belongs. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] Embodiment 1

[0042] As Figures 1-4As shown, the embodiment discloses a cylindrical inner diameter rounding jig, which comprises a fixing assembly 1, a shaping assembly 2, a transmission assembly 3 and a limiting assembly 4.

[0043] The center of the fixing assembly 1 is provided with a through hole, and the shaping assembly 2 is connected with the fixing assembly 1 through the through hole in the center of the fixing assembly 1.

[0044] The transmission assembly 3 is arranged in the interior of the shaping assembly 2 and comprises a stepped shaft 301 which is connected with the shaping assembly 2 in a penetrating manner, and one end of the stepped shaft 301 is connected with a power mechanism; the shaping assembly 2 can slide along the axial direction of the transmission assembly 3.

[0045] The limiting assembly 4 is arranged on the shaping assembly 2 and is elastically connected with the shaping assembly 2.

[0046] The fixing assembly 1 comprises an upper fixing unit and a lower fixing unit which are connected in sequence from top to bottom.

[0047] The upper fixing unit comprises an upper fixing seat 101 which is provided with a plurality of first mounting holes 1011 and a plurality of first through holes 1012; the lower fixing unit comprises a lower fixing seat 102 which is provided with a plurality of second mounting holes 1021 which are arranged correspondingly to the first mounting holes 1011 and a plurality of second through holes 1022.

[0048] The inner circumferential surface of the upper fixing seat 101 is fixedly connected with an inlay 103 for increasing strength.

[0049] The shaping assembly 2 comprises an outer shaping sleeve 201 and a tapered shaft 202; the outer shaping sleeve 201 is a ring-shaped cylindrical structure which is enclosed by n shaping blocks, and the tapered shaft 202 is sleeved in the outer shaping sleeve 201 and is in sliding connection with the outer shaping sleeve 201. The number of the shaping blocks n is 6 or 8 or 12, one side of the shaping block which faces the tapered shaft 202 is an inner side, the inner side of the shaping block is in L-shaped longitudinal section, the inner side surface of the shaping block is an inclined surface which can be attached to the surface of the tapered shaft 202, and the two sides of the shaping block are in L-shaped. The outer shaping sleeve 201 which is enclosed by 12 shaping blocks is in ring-shaped cylindrical shape, and each shaping block can expand and contract along the radial direction under the action of the transmission assembly 3 to apply pressure to the inner wall of the cylindrical barrel which needs to be processed to complete the rounding process.

[0050] In the implementation process, first, the upper fixing unit and the lower fixing unit of the fixing assembly 1 need to be assembled through the first mounting hole 1011 and the second mounting hole 1021, and ensure that the two are firmly connected. The insert 103 of the upper fixing seat 101 is sleeved on the inner circumference of the upper fixing seat 101 to enhance the strength of the fixing assembly 1. Check whether the shaping assembly 2 is correctly connected with the fixing assembly 1, and ensure that the outer shaping sleeve 201 can slide in the axial direction of the fixing assembly 1 under the guidance of the transmission assembly 3. The shaping assembly 2 is sleeved in the central through hole of the fixing assembly 1, and the sliding fit between the taper shaft 202 and the outer shaping sleeve 201 is ensured. Through the power provided by the transmission assembly 3, the connection between the stepped shaft 301 and the power mechanism is started, and the movement of the shaping assembly 2 is started.

[0051] In the shaping process, the power provided by the transmission assembly 3 makes the shaping assembly 2 slide in the axial direction, and after the outer shaping sleeve 201 slides in the axial direction and upward relative to the transmission assembly 3, each shaping block begins to expand radially, and the outer circumferential surface of each shaping block gradually contacts the inner wall of the cylinder with the radial expansion of the radial outer shaping sleeve 201. According to the size and the inner diameter rounding requirement of the cylinder, by controlling the power of the transmission assembly 3, the moving speed and the force of the shaping assembly 2 can be adjusted to achieve the accurate inner diameter rounding effect. The limiting assembly 4 is sleeved in the stepped shaft 301 and is arranged at both ends of the shaping assembly 2 to ensure that the shaping assembly 2 will not exceed the predetermined range in the axial sliding and radial expansion and contraction process during the entire operation process, avoiding damage to the equipment. When the rounding process is completed, the power mechanism is turned off, and the power output of the transmission assembly 3 is stopped. At this time, the shaping assembly 2 will be automatically elastically reset to the initial position by the limiting assembly 4.

[0052] Embodiment 2

[0053] As shown in Figures 7-9 , another cylinder inner diameter rounding jig is disclosed in this embodiment, which is similar to embodiment 1, and the difference lies in that:

[0054] The number n of the shaping blocks is 12, the outer surface of the shaping block is a circular arc, the inner surface of the shaping block facing the taper shaft 202 is a slope, and the inner surface of the shaping block is provided with a first key groove 2011;

[0055] The outer surface of the taper shaft 202 includes a second key groove 2021 corresponding to the first key groove 2011;

[0056] The shaping assembly 2 further includes a flat key 203 arranged between the first key groove 2011 and the second key groove 2021.

[0057] The limiting assembly further includes a limiting sleeve 403 for keeping the taper shaft 202 moving in the axial direction; the limiting sleeve 403 is sleeved in the stepped shaft 301 and located at the end of the taper shaft 202 which is contracted in the axial direction.

[0058] It should be noted that the taper shaft 202 is a 12-sided polygon taper shaft corresponding to the matching of 12 shaping blocks.

[0059] The upper end of the taper shaft 202 is also provided with a limiting block 404 for axially limiting the taper shaft 202, and the middle of the limiting block 404 is provided with a connecting hole, and the limiting block 404 is sleeved in the stepped shaft 301 through the connecting hole.

[0060] In the specific implementation process, the shaping assembly 2 includes an outer shaping sleeve 201 and a taper shaft 202, and the outer shaping sleeve 201 is enclosed by 12 shaping blocks. The outer surface of each shaping block is arc-shaped, the inner side of the shaping block facing the taper shaft 202 is an inclined surface corresponding to the taper shaft 202, and the inner surface of each shaping block is provided with a first key groove 2011 for matching with a second key groove 2021 of the taper shaft 202 to ensure that the shaping block does not rotate or deviate during operation. The outer surface of the taper shaft 202 is provided with a second key groove 2021 corresponding to the first key groove 2011 of the shaping block. The first key groove 2011 and the second key groove 2021 ensure stable connection of the inner side inclined surface of the shaping block and the outer side inclined surface of the taper shaft, avoiding dislocation of the assembly during operation. A flat key 203 is arranged between the first key groove 2011 of the shaping block and the second key groove 2021 of the taper shaft 202, which provides higher transmission accuracy to ensure accurate sliding of the shaping assembly 2 and avoids loosening.

[0061] The limiting assembly 4 limits the movement of the shaping assembly 2 in the axial direction to prevent it from exceeding the predetermined range of movement, and specifically includes the following structure: a limiting sleeve 403 keeps the taper shaft 202 moving in the axial direction, limiting the axial movement range of the taper shaft 202, the limiting sleeve 403 is sleeved in the position fixed in the stepped shaft 301 and located at the end of the taper shaft 202 in the axial direction. Through the design of the limiting sleeve 403, the taper shaft is prevented from exceeding the reasonable range during movement, thereby ensuring the accuracy and stability during processing. The upper end of the taper shaft 202 is provided with a limiting block 404 for axially limiting the taper shaft 202 to prevent excessive axial sliding. The middle of the limiting block 404 is provided with a connecting hole, and the limiting block 404 is fixed in the stepped shaft 301 through the connecting hole. The limiting block 404 ensures that the taper shaft always maintains a stable position during processing.

[0062] Example 3

[0063] As shown in Figures 1-9 , another cylindrical inner diameter rounding jig is disclosed in this embodiment, which is similar to example 1, and the difference is that:

[0064] The end of the outer shaping sleeve 201 is respectively provided with a first annular groove 2012 and a second annular groove 2013, and the longitudinal section of the shaping block is in L shape. A plurality of shaping blocks enclose the outer shaping sleeve 201, and the lower end of the outer shaping sleeve 201 forms a ring-shaped boss 2014.

[0065] The limiting component 4 includes a first limiting rubber ring 401 arranged at the circumference of the first annular groove 2012 and the second annular groove 2013 for maintaining the expansion range of the outer shaping sleeve 201.

[0066] It also includes a second limiting rubber ring 402 arranged at the outer circumference of the ring-shaped boss 2014.

[0067] Both the first limiting rubber ring 401 and the second limiting rubber ring 402 are used to assist the resetting of the position of the shaping sleeve after the radial expansion of the outer shaping sleeve 201.

[0068] The outer shaping sleeve 201 is enclosed by 12 shaping blocks, and the longitudinal section of the shaping block is in L shape, forming a ring-shaped structure. The end of the outer shaping sleeve 201 is respectively provided with a first annular groove 2012 and a second annular groove 2013, and the two annular grooves are used to cooperate with the limiting rubber ring in the limiting component 4, to ensure that the outer shaping sleeve 201 will not be excessively expanded during operation, and to maintain a stable shape and precision. The lower end of the outer shaping sleeve 201 forms a ring-shaped boss 2014, which enhances the structural strength of the outer shaping sleeve, enabling it to withstand greater axial and radial pressure, while providing reliable support for the installation of the limiting rubber ring.

[0069] The first limiting rubber ring 401 is arranged at the circumference between the first annular groove 2012 and the second annular groove 2013 of the outer shaping sleeve 201, and plays a role in maintaining the expansion range of the outer shaping sleeve 201. The elastic properties of the rubber ring can limit the excessive radial expansion of the outer shaping sleeve 201 during operation, ensuring the stability of the shaping assembly. The second limiting rubber ring 402 is arranged at the outer circumference of the ring-shaped boss 2014 of the outer shaping sleeve 201, and is used to limit the radial expansion of the outer shaping sleeve 201, preventing the over-expansion or deformation of the shaping assembly. The rubber ring also has a certain elasticity, which can provide appropriate restoring force, so that the outer shaping sleeve 201 can recover to the initial shape after expansion. The elastic effect of the first limiting rubber ring 401 and the second limiting rubber ring 402 ensures the resetting function of the outer shaping sleeve 201, and after the radial expansion of the outer shaping sleeve 201, the rubber ring will automatically reset the position of the shaping assembly, ensuring that the precision is not affected.

[0070] Working principle

[0071] The worker fixes the inner diameter rounding tool in the cylinder at the specified position of the production line through the locking bolt, the automatic mechanical hand sets the cylinder needing inner diameter rounding on the outer circumference of the outer shaping sleeve, during the process that the power mechanism pulls the stepped shaft to move downward in the axial direction, the tapered shaft will form a fixed whole with the stepped shaft to move in the axial direction due to the limiting effect of the limiting sleeve, the power mechanism pulls the stepped shaft to move downward, the outer shaping sleeve is connected with the tapered shaft through the key groove and the key, the outer shaping sleeve will expand radially along the vertical downward movement of the tapered shaft, the outer shaping sleeve will apply the pressure of the shaping block to the inner wall of the cylinder needing inner diameter rounding after the radial expansion; after the rounding work is completed, the power mechanism pushes the stepped shaft to move upward in the axial direction, the tapered shaft moves upward at the same time, the outer shaping sleeve is contracted radially through the sliding of the key, and the mechanical hand takes out the cylinder after the rounding to detect the inner diameter roundness precision.

[0072] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A cylindrical inner diameter rounding fixture, characterized in that, It comprises a fixing assembly (1), a shaping assembly (2), a transmission assembly (3) and a limiting assembly (4); The center of the fixing assembly (1) is provided with a through hole, and the shaping assembly (2) is connected with the fixing assembly (1) through the through hole in the center of the fixing assembly (1), The transmission assembly (3) is arranged in the interior of the shaping assembly (2) and comprises a stepped shaft (301) which is connected with the shaping assembly (2) and one end of which is connected with a power mechanism; the shaping assembly (2) can move along the axial direction of the fixing assembly (1); The limiting assembly (4) is arranged on the shaping assembly (2) and is elastically connected with the shaping assembly (2).

2. The cylindrical inner diameter rounding jig according to claim 1, wherein The fixing assembly (1) comprises an upper fixing unit and a lower fixing unit which are connected in sequence from top to bottom; The upper fixing unit comprises an upper fixing seat (101) which is provided with a plurality of first mounting holes (1011) and a plurality of first through holes (1012); the lower fixing unit comprises a lower fixing seat (102) which is provided with a plurality of second mounting holes (1021) corresponding to the first mounting holes (1011) and a plurality of second through holes (1022).

3. The cylindrical inner diameter rounding jig according to claim 2, wherein The inner diameter circumference of the upper fixing seat (101) is fixedly connected with an insert (103) for increasing strength.

4. The cylindrical inner diameter rounding jig according to claim 1, wherein The shaping assembly (2) comprises an outer shaping sleeve (201) and a taper shaft (202); the outer shaping sleeve (201) is a ring cylinder structure enclosed by n shaping blocks, and the taper shaft (202) is sleeved in the outer shaping sleeve (201) and is in sliding connection with the outer shaping sleeve (201).

5. The cylindrical inner diameter rounding jig according to claim 4, wherein The number n of the shaping blocks is 6 or 8 or 12.

6. The cylindrical inner diameter rounding jig according to claim 4, wherein The outer surface of the shaping block is a circular arc, the inner surface thereof facing the taper shaft (202) is a slope, and the inner surface of the shaping block is provided with a first key groove (2011); The outer surface of the taper shaft (202) comprises a second key groove (2021) corresponding to the first key groove (2011); The shaping assembly (2) further comprises a flat key (203) arranged between the first key groove (2011) and the second key groove (2021).

7. The cylindrical inner diameter rounding jig according to claim 4, wherein The end of the outer shaping sleeve (201) is respectively provided with a first annular groove (2012) and a second annular groove (2013); the longitudinal section of the shaping block is L-shaped, and the lower end of the outer shaping sleeve (201) formed by the plurality of shaping blocks is a ring-shaped boss (2014).

8. The cylindrical inner diameter rounding jig according to claim 7, wherein The limiting assembly (4) comprises a first limiting rubber ring (401) arranged at the circumference of the first annular groove (2012) and the second annular groove (2013) for keeping the expansion range of the outer shaping sleeve (201); It further comprises a second limiting rubber ring (402) arranged at the outer circumference of the ring-shaped boss (2014); The first limiting rubber ring (401) and the second limiting rubber ring (402) are used for resetting the position of the shaping sleeve after the radial expansion of the outer shaping sleeve (201).

9. The cylindrical inner diameter rounding jig according to claim 1, wherein The limiting assembly further comprises a limiting sleeve (403) for keeping the taper shaft (202) from moving in the axial direction; the limiting sleeve (403) is sleeved in the stepped shaft (301) and located at the end of the taper shaft (202) which is contracted in the axial direction.

10. The cylindrical inner diameter rounding jig according to claim 4, wherein The upper end of the taper shaft (202) is further provided with a limiting block (404) for axially limiting the taper shaft (202); the limiting block (404) is provided with a connecting hole in the middle and is sleeved in the stepped shaft (301) through the connecting hole.

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