Reinforcement connection sleeve, reinforced concrete column and sleeve processing method

Abstract

The present application provides a steel bar connection sleeve, a steel bar concrete column and a sleeve processing method. The steel bar connection sleeve comprises a sleeve body, the sleeve body comprises a head end sleeve section, a middle sleeve section and a terminal sleeve section, the head end sleeve section, the middle sleeve section and the terminal sleeve section are sequentially connected along the axial direction of the sleeve body to form an integral body, a cavity wall of the head end sleeve section is provided with multiple circles of first shear grooves and a first step, a cavity wall of the terminal sleeve section is provided with multiple circles of second shear grooves and a second step, two adjacent circles of first shear grooves are separated by the first step, and two adjacent circles of second shear grooves are separated by the second step, in the direction from the head end sleeve section to the middle sleeve section, the groove width of each circle of first shear grooves and the width of each circle of first steps gradually decrease; in the direction from the terminal sleeve section to the middle sleeve section, the groove width of each circle of second shear grooves and the width of each circle of second steps gradually decrease. The steel bar connection sleeve has the advantage of low production cost.

Description

Technical Field

[0001] The present application belongs to the field of building technology, and specifically relates to a steel bar connection sleeve, a steel bar concrete column and a sleeve processing method. Background Art

[0002] In order to improve efficiency, the construction industry vigorously promotes prefabricated buildings, among which steel bars are the key to force, and the connection of steel bars becomes an important link.

[0003] In the past use, steel bars were extensively connected using grouting sleeves, and annular shear grooves were used inside the grouting sleeves. In order to increase the strength of the grouting sleeves and improve the service life of the grouting sleeves, the shear grooves generally adopted an equal-strength structural design, that is, the grouting sleeves were designed with shear grooves of equal width and equal groove spacing (that is, the width of each circle of shear grooves is equal, and the spacing between two adjacent circles of shear grooves is equal). However, although this equal-strength structural design can increase the strength of the grouting sleeve, it will lead to an increase in the sleeve processing volume, which increases the production cost. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this application is to provide a steel bar connecting sleeve, a steel bar concrete column and a sleeve processing method, aiming to solve the problem of high production cost of the existing steel bar connecting sleeve.

[0005] The technical solution adopted by this application to solve its technical problem is:

[0006] A steel bar connecting sleeve comprises a sleeve body, wherein the sleeve body comprises a head end sleeve section, a middle sleeve section and an end sleeve section, wherein the head end sleeve section, the middle sleeve section and the end sleeve section are connected in sequence along the axial direction of the sleeve body to form an integral body, a cavity wall of the head end sleeve section is provided with a plurality of circles of first shear grooves and a first step, a cavity wall of the end sleeve section is provided with a plurality of circles of second shear grooves and a second step, two adjacent circles of the first shear grooves are separated by the first step, and two adjacent circles of the second shear grooves are separated by the second step, wherein, in the direction from the head end sleeve section to the middle sleeve section, the groove width of each circle of the first shear grooves gradually decreases, and the width of each circle of the first step gradually decreases; in the direction from the end sleeve section to the middle sleeve section, the groove width of each circle of the second shear grooves gradually decreases, and the width of each circle of the second step gradually decreases.

[0007] Preferably, in the direction from the head end sleeve section to the middle sleeve section, the ratio of the width between two adjacent circles of the first shear grooves and the ratio of the width between two adjacent circles of the first steps are both σ i / σ i+1 , where σ represents the stress of the first step of each circle measured by the testing machine after the slurry is filled into the steel connection sleeve with equal groove width and equal groove spacing and the slurry solidifies, and σ iIt represents the stress borne by the first step of the two adjacent circles farther from the middle sleeve section, σ i+1 It represents the stress borne by the other circle of first steps closer to the middle sleeve section among the two adjacent circles of first steps.

[0008] Preferably, in the direction from the end sleeve section to the middle sleeve section, the ratio of the widths of the second shear grooves of two adjacent circles and the ratio of the widths of the second steps of two adjacent circles are both δ i / δ i+1 , where δ represents the stress of the second step of each circle measured by the testing machine after the slurry is filled into the steel connection sleeve with equal groove width and equal groove spacing and the slurry solidifies, δ i Indicates the stress borne by the second step of the two adjacent circles farther from the middle sleeve section, δ i+1 It represents the stress borne by the other circle of second steps closer to the middle sleeve section among the two adjacent circles of second steps.

[0009] Preferably, the first shear groove includes any one of a trapezoidal groove and a rectangular groove; the second shear groove includes any one of a trapezoidal groove and a rectangular groove.

[0010] Preferably, a first slurry flow channel is opened on the end of the head sleeve section away from the middle sleeve section, and a second slurry flow channel is opened on the end of the tail sleeve section away from the middle sleeve section.

[0011] Preferably, a first sealing ring is provided in the head end sleeve section, and a second sealing ring is provided in the end sleeve section. The first sealing ring is located between the first slurry flow channel and the port of the head end sleeve section away from the middle sleeve section, and the second sealing ring is located between the second slurry flow channel and the port of the end sleeve section away from the middle sleeve section.

[0012] Preferably, a first sealing groove is provided on the cavity wall of the first end sleeve section, and a second sealing groove is provided on the cavity wall of the terminal sleeve section. The first sealing ring is installed in the first sealing groove, and the second sealing ring is installed in the second sealing groove.

[0013] Preferably, the first slurry flow channel longitudinally penetrates the first shear groove or the first step and communicates with the inner cavity of the first end sleeve section, and the second slurry flow channel longitudinally penetrates the second shear groove or the second step and communicates with the inner cavity of the end sleeve section.

[0014] A reinforced concrete column comprises a first steel bar, a second steel bar, slurry and the aforementioned steel bar connecting sleeve, wherein the slurry is filled in the steel bar connecting sleeve, the first steel bar is inserted in the head end sleeve section, and the second steel bar is inserted in the end sleeve section.

[0015] A sleeve processing method is applied to the aforementioned steel bar connection sleeve, the method comprising:

[0016] Obtaining internal processing parameters of the steel bar connection sleeve, wherein the internal processing parameters include the width of each circle of the first shear groove and the first step in the first end sleeve section, and / or the width of each circle of the second shear groove and the second step in the end sleeve section;

[0017] According to the internal processing parameters, the pre-installed tool is controlled to perform profiling processing on the sleeve workpiece pre-installed on the machine tool fixture to obtain the steel bar connection sleeve.

[0018] Compared with the prior art, the beneficial effects of this application are:

[0019] The steel bar connection sleeve proposed in the present application designs the groove width and the step width of the shear groove according to the rule that they gradually decrease from the two end portions of the steel bar connection sleeve to the inside, so that the two end portions of the steel bar connection sleeve can adapt to a larger bearing capacity, while the inside can adapt to a smaller bearing capacity, which conforms to the stress condition of "large force on the ends and small force on the inside" of the steel bar connection sleeve in actual use, so that the shear force distribution of the solidification slurry in the steel bar connection sleeve is uniformly changed. Therefore, compared with the existing steel bar connection sleeves with equal groove width and equal groove spacing, the stress distribution of the steel bar connection sleeve is more reasonable, and there is no need to adopt equal groove width and equal groove spacing. The shear groove design with a certain groove spacing can also ensure that the structural strength of the steel bar connecting sleeve can meet the use requirements and is not easily damaged. Moreover, in the steel bar connecting sleeve, since the width and spacing of the shear grooves near the end are larger, and the width and spacing of the shear grooves near the inside are smaller, during the processing and manufacturing of the steel bar connecting sleeve, the cutting force required at the end is larger, while a smaller cutting force is sufficient inside. This is more friendly to the cutting tool and has lower requirements. Therefore, it not only effectively reduces the processing amount of the steel bar connecting sleeve, but also reduces the risk of tool breakage, thereby reducing the production cost of the steel bar connecting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of a steel bar connecting sleeve in one embodiment of the present application;

[0022] Figure 2 This is a schematic cross-sectional structure diagram of a steel bar connecting sleeve in another embodiment of the present application;

[0023] Figure 3 This is a schematic diagram of the structure of a reinforced concrete column in one embodiment of the present application;

[0024] Figure 4 The figure is a schematic diagram of the force distribution inside the steel bar connection sleeve in actual use;

[0025] Figure 5 This is a schematic diagram of the process of a sleeve processing method in one embodiment of the present application;

[0026] Figure 6 This is a control schematic diagram of a servo motor in an embodiment of the present application;

[0027] Figure 7 Schematic diagram of the processing principle of the profiling machine tool in one embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1-head end sleeve section, 11-first shear groove, 12-first step, 13-first slurry flow channel, 14-first sealing groove, 2-middle sleeve section, 3-end sleeve section, 31-second shear groove, 32-second step, 33-second slurry flow channel, 34-second sealing groove, 4-first sealing ring, 5-second sealing ring, 61-first steel bar, 62-second steel bar, 7-solidification slurry, 81-servo motor, 82-servo controller, 83-single chip microcomputer, 84-machine tool axial feed grating ruler, 85-touch screen, 86-slider, 87-back mold, 88-guide rail. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present application, and the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0032] Reference Figure 1 and Figure 3The embodiment of the present application provides a steel bar connection sleeve, including a sleeve body, the sleeve body including a head end sleeve section 1, a middle sleeve section 2 and an end sleeve section 3, the head end sleeve section 1, the middle sleeve section 2 and the end sleeve section 3 are sequentially connected along the axial direction of the sleeve body to form an integral body, a plurality of circles of first shear grooves 11 and a first step 12 are provided on the cavity wall of the head end sleeve section 1, a plurality of circles of second shear grooves 31 and a second step 32 are provided on the cavity wall of the end sleeve section 3, and two adjacent circles of second shear grooves 31 and a second step 32 are provided on the cavity wall of the end sleeve section 3. The first shear grooves 11 are separated from each other by the first steps 12, and the two adjacent circles of the second shear grooves 31 are separated from each other by the second steps 32, wherein in the direction from the head end sleeve section 1 to the middle sleeve section 2, the groove width of each circle of the first shear grooves 11 gradually decreases, and the width of each circle of the first steps 12 gradually decreases; in the direction from the end sleeve section 3 to the middle sleeve section 2, the groove width of each circle of the second shear grooves 31 gradually decreases, and the width of each circle of the second steps 32 gradually decreases.

[0033] At present, the grouting sleeve is usually made of high-quality carbon steel. In actual use, the steps on the shear groove inside the grouting sleeve are strained by the tensile force, such as Figure 4 As shown, the force of the solidification slurry 7 acting on the shear groove decreases from the end of the grouting sleeve to the inside (that is, the force at both ends of the grouting sleeve is large, and the force inside is small). Experiments have shown that the first circle of shear grooves bears 1 / 3 of the total load. As the number of shear grooves increases inward, the force on the shear grooves decreases circle by circle. After the eighth circle, there is almost no force on the shear grooves. Therefore, based on the above findings, in order to make the force distribution inside the grouting sleeve reasonable, the width of the shear grooves should be determined according to the bearing capacity distribution of each circle.

[0034] In this embodiment, the groove width and the step width of the shear groove gradually decrease from the two end portions of the steel bar connection sleeve to the inside (that is, the width and spacing of the shear grooves near the ends of the steel bar connection sleeve are larger, while the width and spacing of the shear grooves near the inside of the steel bar connection sleeve are smaller), so that the two end portions of the steel bar connection sleeve can adapt to a larger bearing capacity, while the inside can adapt to a smaller bearing capacity, which is in line with the stress conditions of the steel bar connection sleeve in actual use, so that the shear force distribution of the solidification slurry 7 in the steel bar connection sleeve is uniformly changed. Therefore, compared with the existing steel bar connection sleeves with equal groove width and equal groove spacing, the stress distribution of the steel bar connection sleeve proposed in this embodiment is more reasonable, and there is no need to adopt a shear groove design with equal groove width and equal groove spacing. The design can also ensure that the structural strength of the steel bar connecting sleeve can meet the use requirements and is not easily damaged. Moreover, in the steel bar connecting sleeve, since the width and spacing of the shear grooves near the end are larger, while the width and spacing of the shear grooves near the inside are smaller (even there is no need to design shear grooves, such as in some specific embodiments, the middle sleeve section 2 does not need to be processed with shear grooves), during the processing and manufacturing of the steel bar connecting sleeve, the cutting force required at the end is larger, while a smaller cutting force is used inside, which is more friendly to the cutting tool and has lower requirements. Therefore, it not only effectively reduces the processing amount of the steel bar connecting sleeve, but also reduces the risk of tool breakage, thereby reducing the production cost of the steel bar connecting sleeve.

[0035] Reference Figures 1 to 3 In an optional embodiment, in the direction from the head end sleeve section 1 to the middle sleeve section 2, the ratio of the widths of the two adjacent circles of the first shear grooves 11 and the ratio of the widths of the two adjacent circles of the first steps 12 are both σ i / σ i+1 , where σ represents the stress of the first step 12 of each circle measured by the testing machine after the slurry is filled into the steel connection sleeve with equal groove width and equal groove spacing and the slurry solidifies, σ i represents the stress borne by the first step 12 of the two adjacent circles that is farther from the middle sleeve section 2, σ i+1 It represents the stress borne by the other circle of first steps 12 closer to the middle sleeve section 2 among the two adjacent circles of first steps 12 .

[0036] In this embodiment, by changing the force ratio of the first shear groove 11, the width ratio of the first shear groove 11 and the width ratio of the first step 12 are customized (specifically, the width of the first step 12 is determined according to the bearing capacity distribution ratio of each circle of the first step 12, and the width of the first shear groove 11 is determined according to the width ratio of the first step 12), so that the force distribution inside the steel bar connection sleeve can be more reasonable, and the shear force distribution of the solidification slurry 7 in the steel bar connection sleeve can be more uniform, which is conducive to further improving the steel bar connection sleeve. Structural stability: In this embodiment, the change of the shear groove width and spacing is customized in proportion to the measured change of the bearing capacity of the shear groove. Specifically, an existing steel bar connection sleeve with equal groove width and groove spacing is taken, and an existing pressure sensor for detecting the bearing stress is attached to each circle of the first step 12, and then slurry is injected into the steel bar connection sleeve. After the slurry solidifies (i.e., solidified slurry 7 is formed), the stress σ1, σ2, ..., σ on each circle of the first step 12 can be measured by an existing testing machine (the testing machine is electrically connected to each pressure sensor). i+1 , the stress ratio between the first step 12 of the first circle and the first step 12 of the second circle (i.e., the stress ratio between the first circle step and the second circle step near the port of the first end sleeve section 1) is: ratio1=σ1 / σ2, and the stress ratio between the first step 12 of the i-th circle and the first step 12 of the i+1th circle is: ratio i =σ i / σ i+1 ; Then, in the direction from the head end sleeve section 1 to the middle sleeve section 2, the width ratio between the first step 12 of the first circle and the first step 12 of the second circle is T1 / T2=σ1 / σ2, and the width ratio between the first step 12 of the i-th circle and the first step 12 of the i+1th circle is T i / T i+1 =σ i / σ i+1 , then in the direction from the head end sleeve section 1 to the middle sleeve section 2, the width ratio between the first circle first shear groove 11 and the second circle first shear groove 11 is L1 / L2=T1 / T2=σ1 / σ2, and the width ratio between the i-th circle first shear groove 11 and the i+1-th circle first shear groove 11 is L i / L i+1 =T i / T i+1 =σ i / σ i+1For example, assuming that the steel bar connection sleeve has 5 circles of first shear grooves 11 and first steps 12, along the direction from the head end sleeve section 1 to the middle sleeve section 2, the widths of each circle of first steps 12 are T1, T2, T3, T4 and T5, respectively, and the widths of each circle of first shear grooves 11 are L1, L2, L3, L4 and L5, respectively. Assuming that the width T1 of the first circle of first steps 12 and the width L1 of the first circle of first shear grooves 11 are both known quantities (for example, the same steps as the existing steel bar connection sleeve are used). width), then T2=(T1σ2) / σ1, T3=(T2σ3) / σ2, T4=(T3σ4) / σ3, T5=(T4σ5) / σ4; L2=(L1σ2) / σ1, L3=(L2σ3) / σ2, L4=(L3σ4) / σ3, L5=(L4σ5) / σ4, and then each shear groove and each step in the head end sleeve section 1 can be processed and formed according to the obtained width of each circle of the first steps 12 and the groove width of each circle of the first shear grooves 11.

[0037] Reference Figures 1 to 3 In an optional embodiment, in the direction from the end sleeve section 3 to the middle sleeve section 2, the ratio of the widths of two adjacent circles of second shear grooves 31 and the ratio of the widths of two adjacent circles of second steps 32 are both δ i / δ i+1 , where δ represents the stress of the second step 32 of each circle measured by a testing machine after the slurry is filled into the steel bar connection sleeve with equal groove width and equal groove spacing and the slurry is solidified, δ i represents the stress borne by the second step 32 of the two adjacent circles which is farther from the middle sleeve section 2, δ i+1 It represents the stress borne by the other circle of second steps 32 closer to the middle sleeve section 2 among the two adjacent circles of second steps 32 .

[0038] In this embodiment, by customizing the change in the width ratio of the second shear groove 31 and the change in the width ratio of the second step 32 according to the change in the force ratio of the second shear groove 31, the force distribution inside the steel bar connection sleeve can be more reasonable, and the shear force distribution of the solidification slurry 7 in the steel bar connection sleeve can be more uniform, which is beneficial to further improve the structural stability of the steel bar connection sleeve. In the direction from the end sleeve section 3 to the middle sleeve section 2, the width of each circle of the second step 32 and the groove width of each circle of the second shear groove 31 are determined in the same process as the width of each circle of the first step 12 and the groove width of each circle of the first shear groove 11. Those skilled in the art can understand that this will not be repeated. It should be noted that in actual production and use, the steel bar connection sleeve generally adopts a symmetrical structural design (that is, the head end sleeve section 1 and the end sleeve section 3 are symmetrical about the middle of the middle sleeve section 2). Therefore, in some specific embodiments, it is only necessary to use a testing machine to measure the stresses σ1, σ2, ..., σ i+1 , the width of all steps and the width of all shear grooves in the steel bar connection sleeve can be determined.

[0039] Reference Figure 1 and Figure 2 In an optional embodiment, the first shear groove 11 includes any one of a trapezoidal groove and a rectangular groove; the second shear groove 31 includes any one of a trapezoidal groove and a rectangular groove.

[0040] In this embodiment, since the steel bar connecting sleeve generally adopts a symmetrical structural design in actual production and use, the groove type of the first shear groove 11 is usually the same as the groove type of the second shear groove 31.

[0041] Reference Figures 1 to 3 In an optional embodiment, a first slurry flow channel 13 is opened on the end of the head sleeve section 1 away from the middle sleeve section 2, and a second slurry flow channel 33 is opened on the end of the terminal sleeve section 3 away from the middle sleeve section 2.

[0042] In this embodiment, when the first slurry flow channel 13 is used as the grouting inlet of the steel bar connecting sleeve, the second slurry flow channel 33 can be used as the grouting outlet of the steel bar connecting sleeve. Of course, the second slurry flow channel 33 can also be used as the grouting inlet of the steel bar connecting sleeve, and the first slurry flow channel 13 can be used as the grouting outlet of the steel bar connecting sleeve. There is no specific limitation on this.

[0043] Reference Figure 1 and Figure 3In an optional embodiment, a first sealing ring 4 is provided in the head end sleeve section 1, and a second sealing ring 5 is provided in the end sleeve section 3. The first sealing ring 4 is located between the first slurry flow channel 13 and the port of the head end sleeve section 1 away from the middle sleeve section 2, and the second sealing ring 5 is located between the second slurry flow channel 33 and the port of the end sleeve section 3 away from the middle sleeve section 2.

[0044] In the present embodiment, the grouting process is to inject from the grouting inlet at one end until the slurry overflows from the grouting outlet at the other end. Since the grouting inlet is connected to the slurry delivery pipe, the slurry pressure at the grouting inlet is relatively large. The steel bar connecting sleeve in the present embodiment is subjected to large forces at both ends and small forces inside. Therefore, during the grouting process, the slurry pressure can be better transmitted from one end of the grouting inlet to one end of the grouting outlet, so that the flow of the slurry can be smoother and the filling of the slurry can be fuller. Therefore, the steel bar connecting sleeve in the present embodiment has a good grouting effect, and compared with the existing steel bar connecting sleeves with equal groove width and equal groove spacing, the grouting reliability is higher.

[0045] Reference Figures 1 to 3 In an optional embodiment, a first sealing groove 14 is further provided on the cavity wall of the head end sleeve section 1, and a second sealing groove 34 is further provided on the cavity wall of the end sleeve section 3. The first sealing ring 4 is installed in the first sealing groove 14, and the second sealing ring 5 is installed in the second sealing groove 34.

[0046] In this embodiment, by providing the sealing groove, the installation of the sealing ring can be facilitated, and at the same time, the sealing performance of the two end ports of the steel bar connecting sleeve can be ensured.

[0047] Reference Figures 1 to 3 In an optional embodiment, the first slurry flow channel 13 longitudinally penetrates the first shear groove 11 or the first step 12 and communicates with the inner cavity of the head end sleeve section 1, and the second slurry flow channel 33 longitudinally penetrates the second shear groove 31 or the second step 32 and communicates with the inner cavity of the end sleeve section 3.

[0048] In this embodiment, since the steel bar connecting sleeve generally adopts a symmetrical structural design in actual production use, under normal circumstances, when the first slurry channel 13 longitudinally penetrates the first shear groove 11, the second slurry channel 33 longitudinally penetrates the second shear groove 31; and when the first slurry channel 13 longitudinally penetrates the first step 12, the second slurry channel 33 longitudinally penetrates the second step 32.

[0049] Reference Figure 3An embodiment of the present application also provides a reinforced concrete column, comprising a first steel bar 61, a second steel bar 62, a slurry, and the steel bar connecting sleeve in any of the above embodiments, wherein the slurry is filled in the steel bar connecting sleeve, the first steel bar 61 is inserted into the head end sleeve section 1, and the second steel bar 62 is inserted into the end sleeve section 3.

[0050] In this embodiment, thanks to the improvement of the above-mentioned steel bar connecting sleeve, the reinforced concrete column has the advantages of stable and reliable structure.

[0051] Refer to 1 and Figure 5 The embodiment of the present application also provides a sleeve processing method, which is applied to the steel bar connection sleeve in any of the above embodiments. The sleeve processing method is implemented by a machine tool. Specifically, the sleeve processing method can be implemented by an existing profiling machine tool. The profiling machine tool includes a servo motor 81, a servo controller 82, a single-chip microcomputer 83, a machine tool axial feed grating ruler 84, a touch screen 85, a slider 86, a backing mold 87, a guide rail 88, a tool (not shown in the figure) and a profiling contact (not shown in the figure), wherein the single-chip microcomputer 83 is electrically connected to the servo controller 82, the machine tool axial feed grating ruler 84 and the touch screen 85, respectively, the servo controller 82 is electrically connected to the servo motor 81, the servo motor 81 is transmission-connected to the slider 86, the slider 86 is slidably connected to the guide rail 88, the backing mold 87 is installed on the slider 86, the tool is rigidly connected to the profiling contact, and the profiling contact maintains contact with the backing mold 87. The sleeve processing method includes the following steps:

[0052] S1, obtaining internal processing parameters of the steel bar connection sleeve, wherein the internal processing parameters include the width of each circle of the first shear groove 11 and the first step 12 in the first end sleeve section 1, and / or the width of each circle of the second shear groove 31 and the second step 32 in the end sleeve section 3;

[0053] S2, according to the internal processing parameters, controls the pre-installed tool to perform profiling processing on the sleeve workpiece pre-installed on the machine tool fixture to obtain the steel bar connection sleeve.

[0054] In the above S1, before obtaining the internal processing parameters of the steel bar connecting sleeve, the width of each circle of the first shear groove 11 and the first step 12 in the head end sleeve section 1 and the width of each circle of the second shear groove 31 and the second step 32 in the end sleeve section 3 are first determined. The determination process has been described in detail in the previous embodiment of the steel bar connecting sleeve, so it will not be repeated here; after obtaining the width parameters of each circle of shear grooves and steps in the steel bar connecting sleeve, the obtained width parameters are manually input into the single-chip computer 83 through the touch screen 85 to prepare for the subsequent profiling process.

[0055] In the above S2, the sleeve workpiece can be made of seamless steel pipe. When the profiling machine starts profiling, the single chip microcomputer 83 sends the corresponding action command to the servo controller 82 according to the received internal processing parameters. The servo controller 82 controls the servo motor 81 to rotate according to the action command. The servo motor 81 drives the slider 86 to move along the guide rail 88 together with the backing mold 87. The curved surface of the backing mold 87 transmits the force to the profiling contact, so that the tool performs the profiling movement to perform profiling on the sleeve workpiece, thereby processing the required shear grooves and steps in the sleeve workpiece (it should be understood here that the first end sleeve section The internal processing of the first end sleeve segment 1 and the end sleeve segment 3 is carried out separately. For example, after the internal processing of the first end sleeve segment 1 is completed, by controlling the tool setting position and the tool feeding direction of the tool, the same processing process as the first end sleeve segment 1 can be executed to complete the internal processing of the end sleeve segment 3. Those skilled in the art can understand this and will not go into details). Among them, the machine tool axial feed grating ruler 84 is used to detect the coordinates of the tool and the sleeve workpiece to observe and track the tool feeding error, so as to play a role in compensating the motion error of the tool and ensure that the width of each circle of shear grooves and steps processed is consistent with the input width parameter.

[0056] In this embodiment, the sleeve processing method adopts a servo profiling processing method, which can achieve high-precision and high-efficiency processing goals on low-end machine tools without the need for high-end machine tools (such as CNC machining centers), effectively reducing manufacturing costs and improving production processability. Moreover, when the model of the steel bar connecting sleeve changes (the width of each circle of shear grooves and steps in the steel bar connecting sleeve will also change with the change of model), it is only necessary to write the corresponding program into the single-chip microcomputer 83 according to the model of the steel bar connecting sleeve (that is, input the internal processing parameters corresponding to the model), and by controlling the action of the servo motor 81, complex shear groove width and spacing changes can be achieved, which is convenient and fast, and improves processing efficiency.

[0057] The above description is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A steel bar connecting sleeve, characterized in that: The invention comprises a sleeve body, wherein the sleeve body comprises a head end sleeve section, a middle sleeve section and a terminal sleeve section, wherein the head end sleeve section, the middle sleeve section and the terminal sleeve section are connected in sequence along the axial direction of the sleeve body to form an integral body, a plurality of circles of first shear grooves and a first step are arranged on the cavity wall of the head end sleeve section, a plurality of circles of second shear grooves and a second step are arranged on the cavity wall of the terminal sleeve section, two adjacent circles of the first shear grooves are separated by the first step, and two adjacent circles of the second shear grooves are separated by the second step, wherein, in the direction from the head end sleeve section to the middle sleeve section, the groove width of each circle of the first shear grooves gradually decreases, and the width of each circle of the first step gradually decreases; in the direction from the terminal sleeve section to the middle sleeve section, the groove width of each circle of the second shear grooves gradually decreases, and the width of each circle of the second step gradually decreases.

2. The steel bar connecting sleeve according to claim 1, characterized in that , in the direction from the first end sleeve section to the middle sleeve section, the ratio of the widths of the first shear grooves between two adjacent circles and the ratio of the widths of the first steps between two adjacent circles are both ,in, It means the stress of the first step in each circle measured by the testing machine after the steel bar connection sleeve with equal groove width and equal groove spacing is filled with slurry and the slurry solidifies. represents the stress borne by the first step of the two adjacent circles which is farther from the middle sleeve section, It represents the stress borne by the other circle of the first steps which is closer to the middle sleeve section among the two adjacent circles of the first steps.

3. The steel bar connecting sleeve according to claim 1, characterized in that: In the direction from the end sleeve section to the middle sleeve section, the ratio of the widths of the second shear grooves between two adjacent circles and the ratio of the widths of the second steps between two adjacent circles are both ,in, It means the stress of the second step in each circle measured by the testing machine after the steel bar connection sleeve with equal groove width and equal groove spacing is filled with slurry and the slurry solidifies. represents the stress borne by the circle of the second steps farther from the middle sleeve section among the two adjacent circles of the second steps, It represents the stress borne by the other circle of the second steps which is closer to the middle sleeve section among the two adjacent circles of the second steps.

4. The steel bar connecting sleeve according to claim 1, characterized in that: The first shear groove includes any one of a trapezoidal groove and a rectangular groove; the second shear groove includes any one of a trapezoidal groove and a rectangular groove.

5. The steel bar connecting sleeve according to any one of claims 1 to 4, characterized in that: A first slurry flow channel is provided on the end of the head sleeve section away from the middle sleeve section, and a second slurry flow channel is provided on the end of the tail sleeve section away from the middle sleeve section.

6. The steel bar connecting sleeve according to claim 5, characterized in that: A first sealing ring is provided in the head end sleeve section, and a second sealing ring is provided in the end sleeve section. The first sealing ring is located between the first slurry flow channel and the port of the head end sleeve section away from the middle sleeve section, and the second sealing ring is located between the second slurry flow channel and the port of the end sleeve section away from the middle sleeve section.

7. The steel bar connecting sleeve according to claim 6, characterized in that: A first sealing groove is also provided on the cavity wall of the head end sleeve section, and a second sealing groove is also provided on the cavity wall of the end sleeve section. The first sealing ring is installed in the first sealing groove, and the second sealing ring is installed in the second sealing groove.

8. The steel bar connecting sleeve according to claim 5, characterized in that: The first slurry flow channel longitudinally penetrates the first shear groove or the first step and communicates with the inner cavity of the first end sleeve section, and the second slurry flow channel longitudinally penetrates the second shear groove or the second step and communicates with the inner cavity of the terminal sleeve section.

9. A reinforced concrete column, characterized in that: It comprises a first steel bar, a second steel bar, a slurry and a steel bar connecting sleeve as described in any one of claims 1 to 8, wherein the slurry is filled in the steel bar connecting sleeve, the first steel bar is inserted in the head end sleeve section, and the second steel bar is inserted in the end sleeve section.

10. A sleeve processing method, characterized in that: Applied to the steel bar connecting sleeve as claimed in any one of claims 1 to 8, the method comprises: Acquire the internal processing parameters of the steel bar connection sleeve, wherein the internal processing parameters include the width of each circle of the first shear groove and the first step in the first end sleeve section, and the width of each circle of the second shear groove and the second step in the end sleeve section; According to the internal processing parameters, the pre-installed tool is controlled to perform profiling processing on the sleeve workpiece pre-installed on the machine tool fixture to obtain the steel bar connecting sleeve.

Images