来源： 最后更新时间：2025-02-12 09:12:13 人气：98907

Straight thread upsetting sleeve:

The upsetting sleeve connection is achieved by pre upsetting the end of the steel bar to be processed with a dedicated upsetting machine, increasing the diameter of the steel bar in that processing section, and then threading the upsetting part with a dedicated threading machine. The diameter of the threaded sleeve can be infinitely adjusted. When connecting, use a regular construction wrench to thicken the straight thread and connect the straight threaded sleeve to the end thread of the steel bar to complete the docking of the steel bar. The upsetting type equal rigidity thread connection technology has the advantages of stability and joint strength greater than the strength of the steel reinforcement base material.

Characteristics of straight thread upsetting sleeve:

High strength: The net cross-sectional area of the steel bar after cutting the thread in the upsetting section is still greater than the original cross-sectional area of the steel bar, that is, the thread does not weaken the section, thus ensuring that the joint strength is greater than the strength of the steel bar base material.

2. Stable performance: The strength of the joint is not affected by the tightening torque, and loose or insufficient threading of 2-3 threads will not significantly affect the strength of the joint, eliminating the influence of worker quality and force measuring tools on the joint performance.

3. Fast connection speed: Straight thread sleeves are about 40% shorter than tapered thread sleeves, and the thread pitch is larger, with fewer threads screwed in, which speeds up the connection speed.

4. Wide application range: It is also used for situations where bent steel bars, fixed steel bars, and steel cages cannot rotate.

5. Economy: Straight threaded joints save 70% of steel compared to extruded joints and 35% of steel compared to tapered threaded joints, resulting in better overall technical and economic benefits.

6. Easy to manage: The processing of straight threaded steel bar joints is carried out in a unified work site and in a flow process.

Key points for operating straight thread upsetting sleeve:

Flat end of steel bars: After straightening the steel bars, use a grinding wheel cutting machine or specialized cutting equipment to cut them. Require the end face of the steel bar to be perpendicular to the axis of the steel bar, and the end face must not bend or have a horseshoe shape. If the end of the steel bar is unqualified, it should be cut off with a grinding wheel cutting machine.

Upsetting experiment: Before each batch of steel bars enters the site for processing, an upsetting experiment should be conducted, and the final value of the optimal upsetting pressure and shortening amount should be determined based on the qualified upsetting amount.

Initial upsetting: Before upsetting, the upsetting machine should first return to the zero position, then insert and tighten the steel bars from the front end, and then apply pressure to the oil pump. Firstly, select an initial upsetting pressure for upsetting.

Determine the optimal parameters: Inspect the upsetting finished product processed by the upsetting experiment, mainly checking whether the upsetting base circle diameter, upsetting length, upsetting shortening size, etc. meet the requirements, and adjust the upsetting pressure according to the inspection results until the qualification rate of the upsetting finished product is not less than 95%, in order to determine the optimal parameters.

The specifications of the straight thread upsetting sleeve are standard grid styles, 

with sizes of 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 32mm, 36mm, and 40mm

If the customer does not provide a definite type and specification of the sleeve, the customer should correctly explain their type, specification, and requirements, and sign the contract under the condition of mutual understanding between the supply and demand parties。

　1、The customer communicated the product type, specifications, and dimensions to our salesperson。

　2、Received customer specifications and dimensions, provided sleeve quotation (price list) for the customer。

　3、Specific agreement: delivery time, special requirements, and other matters。

　4、After placing the order and making payment, our company will arrange shipment as soon as possible。

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