Pressing device for steel bar connecting sleeve
By setting protruding die teeth in the mold cavity of the mold assembly, the problem of sleeve wear in the cold extrusion sleeve connection of steel bars is solved, a tighter steel bar engagement is achieved, and the pull-out resistance is improved.
Patent Information
- Application Number
- CN202423214307.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-12-25
AI Technical Summary
In existing cold extrusion sleeve connection technology for reinforcing bars, the sleeve and the connected reinforcing bars are prone to wear under pressure, resulting in a low pass rate in pull-out tests.
The mold cavity of the mold assembly is provided with raised die teeth, which are parallel and inclined along the axial direction to form a continuous spiral structure, thereby enhancing the interlocking effect between the steel bar and the sleeve.
Under the same pressure, the indentation is deeper and the sleeve and the steel bar are more tightly engaged, which significantly improves the pass rate of the pull-out test.
Smart Images
Figure CN223813923U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of building construction, and relates to a pressing device for steel bar connecting sleeve. BACKGROUND
[0002] The steel bar cold extrusion sleeve connecting technology is a steel bar mechanical connecting method, which inserts the end of the ribbed steel bar into a specially-made steel sleeve, and uses an extruder to compress the steel sleeve, so that the sleeve is plastically deformed to tightly engage with the steel bar, thereby realizing the connection of the steel bar.
[0003] The existing steel bar cold extrusion sleeve connecting technology usually has a concave tooth gap, and under the action of pressure, the sleeve and the connected steel bar are greatly affected by the wear of the extrusion equipment pressure head and the depth of the tooth gap, resulting in a low passing rate of the pull-out test.
[0004] To solve the above problems, the existing steel bar connecting sleeve pressing equipment needs to be improved to ensure the quality of the cold extrusion sleeve connection and ensure that the sleeve and the extruded steel bar engage more tightly after extrusion. UTILITY MODEL CONTENTS
[0005] Therefore, the utility model provides a pressing device for steel bar connecting sleeve, which sets the protruding pressing die tooth gap in the mold cavity, so that the indentation is deeper under the action of the same pressure, the sleeve and the connected steel bar engage more tightly, and the passing rate of the pull-out test is greatly improved.
[0006] The utility model discloses a kind of pressing device for steel bar connecting sleeve, including die assembly and loading component, the die assembly includes outer mould I and outer mould II, the loading component is used to drive the outer mould I and outer mould II mutually close;The outer mould I and outer mould II all have mold cavity, the mold cavity of outer mould I and / or the mold cavity of outer mould II is provided with the pressing die tooth gap that is protruded to the direction of steel bar connecting sleeve.
[0007] Further, the pressing die tooth gap is provided with multiple, and multiple pressing die tooth gaps are arranged in axial parallel.
[0008] Further, the mold cavity of outer mould I and the mold cavity of outer mould II are all provided with pressing die tooth gap, and the pressing die tooth gap is arranged obliquely.
[0009] Further, the pressing die tooth gap of outer mould I and the pressing die tooth gap of outer mould II are in the continuous spiral structure of head-to-tail connection in the closed die state.
[0010] Further, the projection of any pressing die tooth gap in longitudinal section and the central axis of steel bar connecting sleeve form an included angle α, and the angle of the included angle α is between 30 °-60 °.
[0011] Further, the loading member comprises an outer housing and a driving source, the driving source is installed on the outer housing to drive the outer mold I and the outer mold II to be close to each other; the outer housing is provided with working arms, the working arms are provided in parallel, and the working arms are provided with transverse limiting sliding grooves; and the radial two ends of the outer mold I and the outer mold II are respectively detachably and slidably arranged in the limiting sliding grooves of the two working arms, and the outer mold I and the outer mold II are arranged in a mold cavity opposite mode.
[0012] The utility model discloses the beneficial effects of:
[0013] The utility model discloses a kind of compression devices for reinforcing steel connecting sleeve, by being provided with protruding die tooth in mould cavity, it is more deep under the action of same pressure, sleeve and connected reinforcing steel are engaged more closely, greatly improve the pullout test pass rate;Multiple parallel and angularly arranged die tooth make that reinforcing steel connecting sleeve is further enhanced after extrusion forming. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the structural schematic diagram of the utility model;
[0015] Figure 2 It is the front view of the utility model;
[0016] Figure 3 It is the structural schematic diagram of outer mold I of the utility model;
[0017] Figure 4 It is the front view of outer mold I of the utility model;
[0018] Figure 5 It is the structural schematic diagram of outer mold I and outer mold II of the utility model. DETAILED DESCRIPTION
[0019] It should be noted that, in the description of the present application, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In the present embodiment, the axial and radial directions are with reference to the reinforcing steel connecting sleeve to be compressed, the axial direction of the reinforcing steel connecting sleeve is axial and longitudinal, and the diameter direction of the reinforcing steel connecting sleeve is radial and transverse.
[0020] As shown in the figure, the embodiment of the utility model provides a kind of for steel bar connecting sleeve's pressing device, including mould assembly and loading component, the mould assembly includes outer mould I 1 and outer mould II 2, the loading component is used to drive the outer mould I 1 and outer mould II 2 mutually close;The outer mould I 1 and outer mould II 2 all have mould cavity 7, the mould cavity 7 of outer mould I 1 and / or the mould cavity 7 of outer mould II 2 is provided with the protruding die tooth mouth 8 to the direction of steel bar connecting sleeve 5.In this embodiment, because it is the protruding die tooth mouth 8, therefore protruding die tooth mouth 8 can only be arranged in the mould cavity 7 of outer mould I 1, also can only be arranged in the mould cavity 7 of outer mould II 2, or simultaneously arranged in the mould cavity 7 of outer mould I 1 and outer mould II 2, in this embodiment, it is simultaneously arranged in the mould cavity 7 of outer mould I 1 and outer mould II 2, the outer mould I 1 and outer mould II 2 in this embodiment are mutually close to be pushed by loading component when using to extrude steel bar connecting sleeve 5, to outer mould I 1 and outer mould II 2 mutually close, that is, after forming the die closing state, the mould cavity 7 of outer mould I 1 and outer mould II 2 will also mutually close, the two mould cavities 7 after closing are conformal with steel bar connecting sleeve 5, at this time, protruding die tooth mouth 8 extrudes steel bar connecting sleeve 5 and makes it concave, and the indentation is deeper, and sleeve 5 and the steel bar 6 to be connected are more closely engaged, greatly improve the pullout test pass rate.In this embodiment, the outer mould I 1 and outer mould II 2 appearance size and structure are same, and the respective corresponding mould cavity 7 is also same, only the protruding die tooth mouth 8 structure in the respective corresponding mould cavity 7 of outer mould I 1 and outer mould II 2 is different.
[0021] In the embodiment, the protruding die tooth mouth 8 is provided with a plurality of, a plurality of the protruding die tooth mouth 8 is arranged in parallel along the axial direction.The specific number of protruding die tooth mouth 8 can be designed and adjusted according to the size of mould cavity 7 (including diameter and height and other parameter dimensions), but to ensure the tensile effect and indentation depth.When setting, the protruding die tooth mouth 8 arranged in the mould cavity 7 of outer mould I 1 and the protruding die tooth mouth 8 arranged in the mould cavity 7 of outer mould II 2 can be in axial alignment and equal height, also can be mutually staggered, and can be along transverse, also can be inclined, all can reach the purpose of enhancing tensile effect.
[0022] In the embodiment, the die cavity 7 of the outer die I 1 and the die cavity 7 of the outer die II 2 are both provided with a die tooth gap 8, the die tooth gap 8 is obliquely arranged, and the projection of any die tooth gap 8 on the longitudinal section forms an angle α with the central axis of the steel bar connecting sleeve 5, and the angle α is between 30°-60°. In the embodiment, the die tooth gap 8 is designed to be inclined, so that the indentation of the steel bar connecting sleeve 5 can be engaged with the diagonal lines on the outer surface of the steel bar 6 during the tensile process, thereby further improving the tensile and anti-pulling ability of the connected steel bar 6, and avoiding the diagonal lines on the outer surface of the steel bar 6. In the embodiment, the projection of the die tooth gap 8 on the longitudinal section forms an angle α with the central axis of the steel bar connecting sleeve 5 as shown in the figure, and the angle α is preferably 30°-60°, and the angle is too small, which will result in weak tensile capacity, and the angle is too large, which may cause the indentation after extrusion to interfere with the diagonal lines on the outer surface of the steel bar 6, which will ultimately affect its anti-pulling ability, and the angle α in the embodiment is 45°.
[0023] In the embodiment, the die tooth gap 8 of the outer die I 1 and the die tooth gap 8 of the outer die II 2 are connected in series in the closed die state. As shown in the figure, the die tooth gap 8 of the outer die I 1 and the die tooth gap 8 of the outer die II 2 are staggered, and then after closing, the die tooth gap 8 of the continuous spiral structure is formed, which can ensure that the indentation is also continuous after the sleeve 5 is extruded, and it is also a way to ensure its anti-pulling ability.
[0024] In the embodiment, the loading member includes an outer housing and a driving source 4, the driving source 4 is installed on the outer housing to drive the outer die I 1 and the outer die II 2 to approach each other; the outer housing is provided with two parallel working arms 3, any working arm 3 is provided with a transverse limiting sliding groove 301, and the two ends of the outer die I 1 and the outer die II 2 are respectively and detachably slidably arranged in the limiting sliding grooves 301 of the two working arms 3, and the outer die I 1 and the outer die II 2 are arranged in a die cavity 7 opposite manner. In the embodiment, the driving source 4 can be a pneumatic push rod, a pneumatic hammer, a hydraulic push rod, etc., which can be selected according to the actual situation. Two working arms 3 are arranged, and the steel bar connecting sleeve 5 is placed between the two working arms 3 during use, and then the two ends of the outer die I 1 and the outer die II 2 are respectively placed in the limiting sliding grooves 301 of the two working arms 3, and the outer die I 1 and the outer die II 2 are arranged on both sides of the steel bar connecting sleeve 5 in a die cavity 7 opposite manner (i.e. both die cavities 7 face the steel bar connecting sleeve 5), the driving source 4 drives the outer die II 2 to approach each other, thereby extruding the steel bar connecting sleeve 5. How the driving source 4 drives the outer die II 2 is determined according to the actual driving source 4, which is a conventional technical means in the art, and will not be described here.
[0025] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions of the present application should be covered in the scope of the claims of the present application.
Claims
1. A pressing device for a reinforcing bar coupling sleeve, characterized by: The application relates to a mold assembly and a loading component, wherein the mold assembly comprises an outer mold I and an outer mold II, and the loading component is used for driving the outer mold I and the outer mold II to approach each other; the outer mold I and the outer mold II each have a mold cavity, and the mold cavity of the outer mold I and / or the mold cavity of the outer mold II is provided with a die tooth port which protrudes towards a steel bar connecting sleeve.
2. A crimping device for a reinforcing bar coupling sleeve according to claim 1, characterised in that: The die tooth port is provided with a plurality of die tooth ports which are arranged in parallel along the axial direction.
3. A crimping device for reinforcing steel connecting sleeves as claimed in claim 2, characterised in that: The die tooth port is arranged in an inclined mode in the mold cavity of the outer mold I and the mold cavity of the outer mold II.
4. A crimping device for reinforcing steel connecting sleeves as claimed in claim 3, characterised in that: The die tooth ports of the outer mold I and the outer mold II are arranged in a continuous spiral structure in a mold closing state.
5. A crimping device for reinforcing steel connecting sleeves as claimed in claim 3, characterised in that: The projection of any die tooth port in a longitudinal section forms an included angle alpha with the central axis of the steel bar connecting sleeve, and the angle alpha is between 30 DEG and 60 DEG.
6. A crimping device for reinforcing connecting sleeves as defined in claim 1, characterized in that The loading component comprises an outer shell and a driving source which is installed on the outer shell to drive the outer mold I and the outer mold II to approach each other; the outer shell is provided with two parallel working arms, any working arm is provided with a transverse limiting sliding groove, and the two ends of the outer mold I and the outer mold II in the radial direction are respectively and detachably slidably arranged in the limiting sliding grooves of the two working arms; and the outer mold I and the outer mold II are arranged in a mode that the mold cavities face each other.