Roller assembly pressing device
By designing a roll assembly clamping device, the gap between the roll assembly and the machine cover is eliminated by using components such as clamping hydraulic cylinders and wedges, thus solving the roll tilting problem and improving the precision and quality of seamless steel pipes.
Patent Information
- Application Number
- CN202520470191.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-17
AI Technical Summary
In existing seamless steel pipe piercing mills, the gap between the roll assembly and the mill cover causes the rolls to tilt, affecting the accuracy and quality of the steel pipe.
A roll assembly clamping device was designed. It utilizes a combination of clamping hydraulic cylinder, push rod, wedge block and return spring. The movement of the wedge block within the sliding block realizes the up and down movement of the lower pressure block, eliminating the gap between the roll assembly and the machine cover, and ensuring the stability of the roll.
It effectively eliminates the impact of the gap between the roll assembly and the machine cover, improves the production accuracy and quality of steel pipes, and is easy to operate and adjust the roll gap.
Smart Images
Figure CN223862540U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of hot-rolled seamless steel pipe production equipment, specifically to a roll assembly pressing device. Background Technology
[0002] In a seamless steel pipe piercing mill, the roll assembly directly contacts the heated round steel bar, causing it to rotate and, in conjunction with other equipment, transforming the round steel bar into a steel pipe. Therefore, the stability of the roll assembly directly affects the quality and precision of the steel pipe. In existing small-scale seamless steel pipe piercing mills, the roll assembly inside the main unit is pressed down by the main unit's cover. To facilitate adjustment of the roll gap, a gap is left between the cover and the roll assembly. During processing, after the round steel bar bites in, the roll assembly is squeezed. Due to the aforementioned gap, the roll assembly tilts backward. This phenomenon directly leads to deviations in process parameters, resulting in a decrease in the precision of the seamless steel pipe and affecting its quality. Summary of the Invention
[0003] This utility model provides a rolling mill assembly clamping device to achieve the purpose of limiting the rolling mill assembly and improving the precision of steel pipes.
[0004] A roll assembly clamping device includes a clamping hydraulic cylinder, a push rod, a sliding block, a wedge block, a lower pressure block, and a return spring;
[0005] The clamping hydraulic cylinder is mounted on the machine cover, with its extended end extending into the machine cover and connected to a push rod. A wedge is connected to the end of the push rod by a pin. The upper side of the wedge is mounted inside the sliding block, and the lower side of the wedge contacts the lower pressure block. A protrusion extends from the lower side of the lower pressure block, and a return spring is installed in contact with the lower side of the lower pressure block.
[0006] Furthermore, keyways are provided on the slide block and the cover, and positioning keys are installed in the keyways.
[0007] Furthermore, the aforementioned pressing device on the rolls is provided at two locations on each roll box.
[0008] Furthermore, a baffle is installed at the pin.
[0009] Furthermore, the sliding block is fixed to the cover with bolts using a positioning key.
[0010] Furthermore, the lower pressure block is fitted onto the slide plate; the slide plate has a through hole, and the protrusion of the lower pressure block fits into the through hole; a return spring is directly installed between the slide plate and the lower pressure block; the slide plate is installed on the outside of the roll assembly.
[0011] The beneficial effects of this utility model are:
[0012] The position of the wedge block within the sliding block is changed by extending and retracting the clamping cylinder, thereby moving the lower pressure block up and down, thus clamping the roll assembly and eliminating the gap between the roll assembly and the machine cover. When it is necessary to adjust the roll gap, simply retract the clamping hydraulic cylinder and lift the lower pressure block under the action of the return spring to adjust the roll gap without opening the machine cover.
[0013] It is evident that the roll assembly clamping device provided by this utility model is easy to operate and can overcome the problem of the gap between the roll assembly and the machine cover affecting the processing. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the structure of this utility model in conjunction with a skateboard;
[0016] Figure 3 This is a schematic diagram of the structure of this utility model in conjunction with a skateboard from another perspective;
[0017] Figure 4 This is a schematic diagram of the structure of this utility model with a positioning key and a sliding plate installed;
[0018] Figure 5 This is a schematic diagram of the usage state of this utility model;
[0019] Figure 6 This is a schematic diagram of the usage state of this utility model;
[0020] In the diagram: 1. Clamping hydraulic cylinder; 2. Push rod; 3. Sliding block; 4. Wedge block; 5. Lower pressure block; 6. Return spring; 7. Machine cover; 8. Positioning key; 9. Slide plate; 10. Roll assembly. Detailed Implementation
[0021] The technical solution of this utility model will be further explained and described below through specific embodiments. Example
[0022] Referring to the accompanying drawings, this utility model provides a roll assembly pressing device, including a pressing hydraulic cylinder 1, a push rod 2, a sliding block 3, a wedge block 4, a lower pressing block 5, and a return spring 6;
[0023] The clamping hydraulic cylinder 1 is mounted on the machine cover 7, with its extended end extending into the machine cover 7 and connected to a push rod 2. A wedge block 4 is connected to the end of the push rod 2 by a pin. A baffle is installed at the pin to block the pin and is bolted to prevent the pin from falling off. The upper side of the wedge block 4 is installed inside the sliding block 3. Keyways are provided on the sliding block 3 and the machine cover 7, and a positioning key 8 is installed in the keyway. The sliding block 3 is fixed to the machine cover by bolts through the positioning key 8. The lower side of the wedge block 4 contacts the lower pressure block 5, and a protrusion extends from the lower side of the lower pressure block 5. A return spring 6 is installed in contact with the lower side of the lower pressure block 5. The lower side of the lower pressure block 5 is fitted onto the slide plate 9. A through hole is provided on the slide plate 9, and the protrusion of the lower pressure block 5 fits into the through hole. A return spring is installed between the slide plate 9 and the lower pressure block. The slide plate 9 is installed on the outside of the roll assembly.
[0024] The aforementioned pressing device on the rolls is installed in two locations on each roll box.
[0025] During use, when the clamping hydraulic cylinder 1 extends, the protrusion presses firmly against the roll assembly 10, ensuring the roll assembly operates without gaps. When the clamping hydraulic cylinder 1 retracts, the return spring 6 returns the lower pressure block 5 to its original position, releasing the clamping force on the roll assembly 10. This prevents backward tilting and other minor vibrations during steel pipe production, ensuring the precision of steel pipe production.
Claims
1. A rolling mill assembly clamping device, characterized in that, It includes a clamping hydraulic cylinder, push rod, sliding block, wedge block, lower pressure block, and return spring; The clamping hydraulic cylinder is mounted on the machine cover, with its extended end extending into the machine cover and connected to a push rod. A wedge is connected to the end of the push rod by a pin. The upper side of the wedge is mounted inside the sliding block, and the lower side of the wedge contacts the lower pressure block. A protrusion extends from the lower side of the lower pressure block, and a return spring is installed in contact with the lower side of the lower pressure block.
2. The roll assembly pressing device according to claim 1, characterized in that, Keyways are provided on the slide block and the cover, and the positioning key is installed in the keyway.
3. The rolling mill assembly clamping device according to claim 1, characterized in that, Two clamping devices are installed on each roll box.
4. The rolling mill assembly clamping device according to claim 1, characterized in that, A baffle is installed at the pin.
5. The rolling mill assembly clamping device according to claim 1, characterized in that, The sliding block is fixed to the cover with bolts using a positioning key.
6. The rolling mill assembly clamping device according to claim 1, characterized in that, The lower pressing block is fitted onto the slide plate; the slide plate has a through hole, and the protrusion of the lower pressing block fits into the through hole; a return spring is directly installed between the slide plate and the lower pressing block; the slide plate is installed on the outside of the rolling roller assembly.