An automatic reset cold extrusion sleeve positioning fixture and method

Abstract

The application discloses an automatic reset cold extrusion sleeve positioning fixture and method, relates to the technical field of steel bar connection, and solves the problems of low operation efficiency, inaccurate positioning and easy uneven extrusion in the prior art by using a marking pen or binding iron wire to mark the end of a steel bar, improves the steel bar marking efficiency, and specifically has the following arrangement: an automatic reset cold extrusion sleeve positioning fixture, which comprises a positioning sleeve, the one end of the positioning sleeve is open, a containing space is arranged between the inner wall surface and the outer wall surface of the positioning sleeve, linkage rods are arranged in the containing space and are distributed along the bottom and the side edge of the positioning sleeve, a cutter head is arranged at the end of the linkage rod of the side edge and extends out of the inner wall surface of the positioning sleeve, a first spring is connected to the linkage rod of the bottom and extends out of the center of the inner wall surface of the bottom of the positioning sleeve, the head of the steel bar is inserted into the positioning sleeve to press the first spring and drive the cutter head to extend out and collide with the rod part of the steel bar to mark a line, and a second spring is fixed in the containing space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel bar connection, in particular to an automatic reset cold extrusion sleeve positioning fixture and method. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] The steel bar joint forms include: binding connection, welding connection, mechanical connection, mechanical connection is divided into: straight thread, taper thread, sleeve extrusion, sleeve grouting, etc. Among them, the steel sleeve cold extrusion connection is a new technology of steel bar connection. The cold extrusion technology of steel sleeve has the characteristics of simple construction process, easy to master, fast construction speed, compared with the traditional welding method, it can save a lot of time and reduce the engineering cost, and is suitable for the radial extrusion connection of ribbed steel bars with diameter of φ16-φ40.

[0004] But in actual construction, the threaded steel bar needs to be positioned by marking before butt joint, and the common method in engineering site is to mark by using a marker pen or binding iron wire, which has the problems of low operation efficiency, inaccurate positioning, easy uneven extrusion, etc., and the quality of steel bar connection part is uneven, which is completely controlled by the experience and skill level of workers when marking, or needs to be measured by tools before marking each time, which is easy to cause engineering structure hidden danger. SUMMARY

[0005] In view of the defects in the prior art, the present application provides an automatic reset cold extrusion sleeve positioning fixture and method, which solves the technical problems that the existing technology uses a marker pen or binding iron wire to mark the end of the steel bar, has low operation efficiency, inaccurate positioning, easy uneven extrusion, is completely controlled by the experience and skill level of workers, or needs to be measured by tools before marking each time, and is easy to cause engineering structure hidden danger.

[0006] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0007] An automatic reset cold extrusion sleeve positioning fixture, comprising a positioning sleeve, one end of the positioning sleeve is open for the steel bar to be inserted and marked, a containing space is provided between the inner wall surface and the outer wall surface of the positioning sleeve, and a linkage rod member is arranged in the containing space and distributed along the bottom and the side edge of the positioning sleeve;

[0008] The end of the side linkage rod is provided with a cutter head extending out of the inner wall surface of the positioning sleeve, the linkage rod on the bottom is connected with a first spring extending out of the center of the inner wall surface of the bottom of the positioning sleeve, the steel bar head is inserted into the positioning sleeve to press the first spring and drive the cutter head to extend out to collide with the steel bar to draw a line, a second spring is fixed in the accommodating space and abuts against the linkage rod for resetting the linkage rod.

[0009] The linkage rod is fixed at the intersection of the bottom and the side of the accommodating space and is rotationally connected with the positioning sleeve.

[0010] The linkage rod is L-shaped, and the folding point of the L-shaped linkage rod is rotationally connected with the positioning fixture.

[0011] The linkage rod is U-shaped and symmetrically structured, the bottom midpoint of the U-shaped linkage rod is fixed with the first spring, the bottom midpoint of the linkage rod is a hinged structure, and the outer ends of the two sides of the U-shaped linkage rod are connected with cutter heads extending out of the inner wall surface of the positioning sleeve.

[0012] The cutter head is provided with a third spring between the cutter head and the linkage rod.

[0013] The cutter head is crescent-shaped, has two cutting edges, the axes of the two cutting edges are parallel to the axis of the positioning sleeve, and the two cutting edges collide with the steel bar to form a positioning line and a checking line.

[0014] The positioning sleeve is provided with a positioning line and a checking line on the outer surface, and the positioning line and the checking line are arranged corresponding to the cutting edges of the cutter head.

[0015] The outer wall surface of the positioning sleeve is provided with a first opening, and the cutter head extends out of a second opening in the inner wall surface of the positioning sleeve.

[0016] The linkage rod on the side of the positioning sleeve is a telescopic rod, and the cutter head is moved along the second opening to change the position of the cutter head in the positioning sleeve by clamping the telescopic rod through the first opening.

[0017] A working method of an automatic reset cold extrusion sleeve positioning fixture, which adopts the automatic reset cold extrusion sleeve positioning fixture as described above, comprises the following steps:

[0018] Insert the steel bar into the positioning fixture, compress the first spring with the head of the steel bar, rotate the linkage rod in the accommodating space, push the cutter head out, and collide with the steel bar to complete the marking line;

[0019] During the process of the cutter head colliding with the steel bar, the second spring stores energy, the marked steel bar is pulled out, the second spring releases the elastic potential energy, and the linkage rod is reset;

[0020] Repeat the insertion and withdrawal of the steel bar into the positioning sleeve to mark multiple steel bars;

[0021] By clamping the telescopic rod through the first opening, the position of the cutter head between the positioning sleeves is changed, and the steel bar with different positioning line marking requirements is continuously marked.

[0022] The beneficial effects of the above-mentioned application are as follows:

[0023] 1. The application has the linkage rod distributed along the bottom and side edge of the positioning sleeve in the accommodating space; the end of the linkage rod on the side edge is provided with the cutter head extending out of the inner wall surface of the positioning sleeve, and the linkage rod on the bottom is connected with the first spring extending out of the center of the inner wall surface of the bottom of the positioning sleeve, so that when the steel bar enters the positioning sleeve, the first spring is compressed, and then the cutter head is extended out through the linkage rod to collide with the steel bar to complete the marking line. When the steel bar is withdrawn, the second spring can release the elastic potential energy to reset the linkage rod, so that the positioning fixture can be continuously used to mark the steel bar, and the working efficiency is improved.

[0024] 2. The linkage rod of the application is designed in a symmetrical structure of U shape, so that after the steel bar is inserted into the positioning sleeve, the two cutter heads simultaneously mark the opposite sides of the ribbed steel bar, the marking length of the outer surface of the steel bar is expanded, and in the later stage, the steel bar does not need to be rotated to find the positioning line and the inspection line during the cold extrusion acceptance, which is convenient to operate.

[0025] 3. The application innovates on the basis of the traditional cold extrusion sleeve construction technology, combines the positioning and marking and the automatic reset device, and after drawing two lines on the steel bar, the spring and the cutter head are automatically reset, which can be continuously operated. With the aid of the cold extrusion machine, the steel bar and the cold extrusion sleeve are cold extruded and fixedly engaged, the operation efficiency is greatly improved, the positioning accuracy is improved, and the quality and safety control hidden danger caused by the difference in experience and skill level of workers is improved to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings accompanying the specification of the application form a part of the application and serve to provide further understanding of the application, and the illustrative embodiments of the application and their descriptions serve to explain the application, and do not constitute an improper limitation on the application.

[0027] Figure 1 is a sectional view of an automatic reset cold extrusion sleeve positioning fixture of the application.

[0028] Figure 2 It is the overall structure diagram of the automatic reset cold extrusion sleeve positioning fixture.

[0029] Figure 3 It is the cold extrusion schematic diagram of the first steel bar and the second steel bar in the embodiment of the application.

[0030] In the figure: the mutual distance or size is exaggerated to show the position of each part, and the schematic diagram is only illustrative.

[0031] Among them: 1. Positioning sleeve, 2. Positioning line, 3. Inspection line, 4. First spring, 5. Knife head, 6. Steel bar, 7. Rotation point, 8. Linkage rod, 9. Telescopic rod, 10. Cold extrusion sleeve, 11. First steel bar, 12. Second steel bar, 13. Cold extrusion machine. DETAILED DESCRIPTION

[0032] It should be pointed out that the following detailed description is exemplary and is intended to provide further description of the application. Unless otherwise specified, all technical and scientific terms used in the application have the same meaning as generally understood by those skilled in the art to which the application belongs.

[0033] As introduced in the background, the existing technology uses a marker pen or a method of binding iron wire to mark the end of the steel bar, which has the problems of low operation efficiency, inaccurate positioning, easy uneven extrusion, completely controlled by the experience and skill level of workers, or the need to use tools to measure before marking each time, and easy to cause engineering construction hazards. In order to solve the above technical problems, the application provides an automatic reset cold extrusion sleeve positioning fixture and method.

[0034] Embodiment one

[0035] In a typical embodiment of the application, referring to Figures 1-3 The automatic reset cold extrusion sleeve positioning fixture includes a positioning sleeve 1, one end of the positioning sleeve 1 is open for the steel bar to be inserted for marking, and the other end of the positioning sleeve 1 is closed for abutting against the head of the steel bar. A containing space is provided between the inner wall surface and the outer wall surface of the positioning sleeve 1, and linkage rods are arranged in the containing space and distributed along the bottom and the side edge of the positioning sleeve. After the steel bar 6 is inserted into the positioning sleeve, the automatic reset cold extrusion sleeve positioning fixture of the embodiment completes the marking step of the steel bar through the linkage rods.

[0036] The end of the linkage rod on the side edge is provided with a knife head 5 extending out of the inner wall surface of the positioning sleeve, and the linkage rod on the bottom is connected with a first spring 4 extending out of the center of the inner wall surface of the bottom of the positioning sleeve. The head of the steel bar 6 is inserted into the positioning sleeve 1 to press the first spring 4 and drive the knife head 5 to extend out and collide with the rod of the steel bar 6 for marking. A second spring is fixed in the containing space and abuts against the linkage rod for resetting the linkage rod.

[0037] The linkage rod 8 is fixed at the intersection of the bottom and side of the accommodating space and rotatedly connected to the positioning sleeve. This enables the head of the rebar to press the part of the linkage rod located at the closed end of the positioning sleeve, and the cutter head at the other end of the linkage rod 8 extends out to collide with the rebar, thus completing the marking.

[0038] In a preferred example, such as Figure 1 As shown, the linkage 8 is L-shaped. The inflection point of the L-shaped linkage is rotatably connected to the positioning clamp. This inflection point serves as the rotation point 7 of the L-shaped linkage. Figure 1 From the perspective of the device, the reinforcing bar is inserted into the positioning sleeve from the right end, the first spring 4 is compressed, and the vertical section of the linkage rod rotates about the rotation point 7. At the same time, the horizontal section of the linkage rod also rotates about the rotation point 7, and the cutter head extends to complete the scribing of the reinforcing bar.

[0039] In another example, the linkage 8 is a U-shaped symmetrical structure (not shown in the attached figure). The U-shaped linkage is fixed to the first spring near the bottom midpoint. The bottom midpoint of the linkage is a hinge structure. The outer ends of both sides of the U-shaped linkage are connected to the cutter head that extends out of the inner wall of the positioning sleeve.

[0040] Specifically, the aforementioned U-shaped linkage 8 is hinged at the midpoint of the bottom of the positioning sleeve, thus dividing the U-shaped linkage into two rotatably connected L-shaped linkages. Alternatively, the two L-shaped linkages can be unhinged, with their ends near the midpoint of the bottom of the positioning sleeve fixedly connected to the first spring.

[0041] The linkage is designed in a U-shape, which allows the two cutter heads to simultaneously scribble lines on opposite sides of the ribbed steel bar after the steel bar is inserted into the positioning sleeve. This expands the scribing length on the outer surface of the steel bar, so that during the later cold extrusion acceptance of the steel bar, there is no need to rotate the steel bar to find the positioning line and inspection line, making the operation convenient.

[0042] In this embodiment, the reinforcing bar is a ribbed reinforcing bar, and the first spring is extended by opening an opening on the inner wall of the closed end of the positioning sleeve.

[0043] A second spring is also fixed within the accommodating space, and the second spring is fixed to the outer wall surface of the positioning sleeve.

[0044] In a preferred embodiment, the second spring is fixed to the outer wall of the closed end of the positioning sleeve, and the other end of the second spring abuts against the linkage member. The second spring is located at the center of the positioning sleeve and is correspondingly positioned to the end of the first spring relative to the linkage member.

[0045] The second spring is designed so that after the reinforcing bar 6 enters the positioning sleeve 1, it compresses the first spring 4, causing the first spring 4 to rotate and push the linkage rod 8. The first spring 4 has a pushing effect and also protects the linkage rod 8 from collision with the ribbed reinforcing bar. The second spring is also compressed during this process, protecting the linkage rod and the positioning sleeve and preventing the linkage rod 8 from colliding with the positioning sleeve 1 and causing damage. The second spring has a buffering function.

[0046] When the reinforcing bar 6 exits the positioning sleeve 1, the compressed second spring releases its elastic potential energy, which has the function of resetting the linkage rod. At this time, the cutter head retracts.

[0047] In another example, the second spring can be set at the end of the linkage rod 8 on the side of the positioning sleeve 1. One end of the second spring is fixedly connected to the outer wall of the positioning sleeve, and the other end is fixedly connected to the end of the linkage rod. When the reinforcing bar enters the positioning sleeve, the linkage rod 8 rotates and the second spring is stretched. After the marking is completed, the reinforcing bar is removed and the second spring returns to its initial length, thereby resetting the linkage rod.

[0048] In other examples, the position of the second spring can be set arbitrarily. In general, when the reinforcing bar enters the positioning sleeve, the second spring at the bottom of the positioning sleeve is in a compressed state, while the second spring on the side of positioning sleeve 1 is in a stretched state. It should be noted that the bottom of the positioning sleeve in this embodiment refers to the closed end of the positioning sleeve.

[0049] To protect the cutter head 5 and prevent it from rigidly colliding with the ribbed steel bar, a third spring is provided between the cutter head 5 and the linkage rod, which provides a buffering effect on the cutter head and optimizes the scribing effect.

[0050] Furthermore, the cutter head 5 is crescent-shaped and has two cutting edges. The axes of the two cutting edges are parallel to the axis of the positioning sleeve. After the two cutting edges collide with the reinforcing bar, they form positioning lines and inspection lines on the ribbed reinforcing bar. Figure 1 Taking the view as an example, the left blade on the cutter head 5 is used to form a positioning line on the reinforcing bar, and the right blade is used to form an inspection line.

[0051] The outer surface of the positioning sleeve 1 is also provided with positioning line 2 and inspection line 3. Positioning line 2 and inspection line 3 are set in correspondence with the cutting edge of the cutter head 5, so as to facilitate the staff to clearly see the position of the cutter head inside the positioning fixture.

[0052] like Figure 1 As shown, in this embodiment, the first positioning line should be 60mm from the end of the rebar, and the second inspection line should be 10mm from the positioning line. This meets the specifications and eliminates the errors and hassles caused by each measurement, thus improving the worker's operational efficiency.

[0053] Further, the outer wall surface of the positioning sleeve 1 is provided with a first opening, and the cutter head extends from a second opening on the inner wall surface of the positioning sleeve. The linkage lever located on the side of the positioning sleeve 1 is a telescopic rod 9, which is clamped through the first opening to realize the movement of the cutter head along the second opening to change the position of the cutter head between the positioning sleeves, so as to facilitate the adjustment of different positioning line marking requirements, and the positioning line 2 and the inspection line 3 on the outer surface of the positioning sleeve 1 also need to be changed at the same time.

[0054] The telescopic rod 9 is composed of two sleeves, the outer sleeve is provided with a plurality of through holes, and the inner sleeve is provided with a protrusion and a spring. When the inner sleeve is pushed, the two sleeves can slide, and when the length is adjusted to the appropriate length, the protrusion extends out of the through hole. The structure of the telescopic rod can refer to the structure of the supporting member of the foldable umbrella, which is a prior art and will not be described here.

[0055] Embodiment two

[0056] A working method of an automatic reset cold extrusion sleeve positioning fixture, characterized in that it comprises the following steps:

[0057] Insert the steel bar 6 into the positioning fixture, compress the first spring 4 with the head of the steel bar 6, push the linkage lever 8 to rotate in the accommodating space with the first spring 4, push the cutter head 5 to extend out and collide with the steel bar 6 to complete the marking; and

[0058] During the collision of the cutter head 5 with the steel bar 6, the second spring is charged, the marked steel bar is pulled out, the elastic potential energy of the second spring is released, and the linkage lever is reset; that is, after the steel bar 6 completes the marking, it is taken out of the positioning sleeve 1, at this time the first spring 4 at the bottom returns to the original length, the third spring and the cutter head 5 are also retracted, and then the marking operation of the next steel bar can be performed, so that continuous steel bar processing can be realized.

[0059] Repeat the insertion and withdrawal of the steel bar into the positioning sleeve to mark a plurality of steel bars.

[0060] When it is necessary to change the position of the cutter head, the telescopic rod is clamped through the first opening to change the position of the cutter head between the positioning sleeves, and the steel bar with different positioning line marking requirements is marked.

[0061] As shown in Figure 3 When the first steel bar and the second steel bar after marking need to be butt-jointed, the first steel bar and the second steel bar with marks are inserted into the cold extrusion sleeve, the cold extrusion machine is started, and the cold extrusion operation is performed on the cold extrusion sleeve and the steel bar.

[0062] Specifically, the first steel bar 11 and the second steel bar 12 are respectively inserted into the cold extrusion sleeve 10, and the cold extrusion machine 13 can start working according to the positioning line, and then the cold extrusion operation of the steel sleeve is completed. The pressure jaws of the cold extrusion machine 13 are aligned with the positioning line 2, the pressure jaws are kept perpendicular to the cold extrusion sleeve 10, the first steel bar 11 and the second steel bar 12 are kept on a horizontal axis, the first steel bar 11 and the second steel bar 12 are fixed and engaged with the cold extrusion sleeve 10 by using the cold extrusion machine 13, and the precision of the connection of the two steel bars is ensured.

[0063] After the first steel bar 11 and the second steel bar 12 are extruded, the cold extrusion sleeve 10 extends to the positioning line 2, and the distance from the inspection line 3 is measured by using a caliper to check and accept.

[0064] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic reset cold extrusion sleeve locator fixture, characterized by, The positioning sleeve is provided with an opening at one end for inserting a steel bar to draw a line, and an accommodating space is arranged between the inner wall and the outer wall of the positioning sleeve, and the accommodating space is provided with linkage levers distributed along the bottom and the side of the positioning sleeve; The end of the linkage lever of the side is provided with a cutter head extending out of the inner wall of the positioning sleeve, and the linkage lever of the bottom is connected with a first spring extending out of the center of the inner wall of the bottom of the positioning sleeve, the head of the steel bar is inserted into the positioning sleeve to press the first spring and drive the cutter head to extend out to collide with the steel bar to draw a line, a second spring is fixed in the accommodating space and abuts against the linkage lever to reset the linkage lever; The linkage lever is fixed at the intersection of the bottom and the side of the accommodating space and rotationally connected with the positioning sleeve; The linkage lever is L-shaped, and the folding point of the L-shaped linkage lever is rotationally connected with the positioning fixture; The cutter head has two cutting edges, the axes of the two cutting edges are parallel to the axis of the positioning sleeve, and the two cutting edges collide with the steel bar to form a positioning line and an inspection line; The outer wall of the positioning sleeve is provided with a first opening, the cutter head extends out of a second opening in the inner wall of the positioning sleeve, the linkage lever at the side of the positioning sleeve is a telescopic rod, and the cutter head is moved along the second opening by clamping the telescopic rod through the first opening to change the position of the cutter head in the positioning sleeve.

2. An automatic reset cold extrusion sleeve locator fixture according to claim 1, wherein, The linkage lever is a symmetrical structure in U shape, the bottom midpoint of the U-shaped linkage lever is fixed with the first spring, the bottom midpoint of the linkage lever is a hinged structure, and the outer ends of the two side edges of the U-shaped linkage lever are connected with cutter heads extending out of the inner wall of the positioning sleeve.

3. An automatic reset cold extrusion sleeve locator fixture according to claim 1, wherein, A third spring is arranged between the cutter head and the linkage lever.

4. An automatic reset cold extrusion sleeve locator fixture according to claim 1, wherein, The cutter head is in the shape of a crescent.

5. An auto-resetting cold extrusion sleeve locator fixture according to claim 4, wherein, The outer surface of the positioning sleeve is provided with a positioning line and an inspection line, and the positioning line and the inspection line are arranged correspondingly with the cutting edges of the cutter head.

6. A method of operating an automatic reset cold extrusion sleeve locator according to any one of claims 1 to 5, wherein, The method comprises the following steps: The steel bar is inserted into the positioning fixture, the head of the steel bar compresses the first spring, the linkage lever rotates in the accommodating space, the linkage lever pushes the cutter head to extend out, and the collision of the cutter head with the steel bar completes the line drawing; During the collision of the cutter head with the steel bar, the second spring stores energy, the steel bar after line drawing is pulled out, the second spring releases the elastic potential energy to reset the linkage lever; The steel bar is repeatedly inserted into and pulled out of the positioning sleeve to draw lines on multiple steel bars; The telescopic rod is clamped through the first opening to change the position of the cutter head in the positioning sleeve, and the steel bar with different positioning line drawing requirements is continuously drawn.

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