Hard alloy counterattack block for high-impact crushing equipment
By embedding cemented carbide short rods on the impact block of the high impact crushing equipment, the problem of high-chromium cast iron impact blocks is solved, significantly improving wear resistance and service life, and achieving higher impact resistance.
Patent Information
- Application Number
- CN202323351900.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-10
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2033-12-10
AI Technical Summary
The existing high-chromium cast iron impact blocks have high wear rate and short service life in high impact crushing equipment, making it difficult to meet the wear resistance requirements under high load conditions.
A number of short carbide rods are embedded on the front or side of the counter block. The spacing between the cemented carbide rods is smaller than the material diameter. The high hardness and thermal hardness of the cemented carbide significantly improve the wear resistance of the counter block.
It significantly reduces the wear rate of the counter block, extends the service life several times, from April to May to September to October, and improves the impact resistance.
Smart Images
Figure CN222287522U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hard alloy impact block for high impact crushing equipment, which has impact resistance and wear resistance several times that of high manganese steel or high chromium cast iron and good impact crushing effect, and belongs to the field of impact block manufacturing. Background Art
[0002] CN 105728144 A. Name "Anti-impact plate assembly and crusher", used to improve the service life of the anti-impact plate assembly. The anti-impact plate assembly includes at least two anti-impact plates, each of which is stacked up and down, and each of which is used to fix with the crushing chamber of the crusher. In the above technical scheme, when the anti-impact plate assembly is worn during use, the order of the anti-impact plates can be swapped up and down, so that the wear area is moved to the upper and lower edges of the anti-impact plate assembly to ensure that the middle part of the anti-impact plate assembly can be used normally. The shortcomings are: the anti-impact plate material is not wear-resistant. Although when wear occurs, the order of the anti-impact plates can be swapped up and down, so that the wear area is moved to the upper and lower edges of the anti-impact plate assembly to ensure that the middle part of the anti-impact plate assembly can be used normally. However, due to the poor wear resistance of the anti-impact plate itself and the short service life, it is only used for 4 to 5 months under normal conditions. Summary of the invention
[0003] Design purpose: To avoid the shortcomings of the background technology, design a hard alloy impact block for high impact crushing equipment, which has impact resistance and wear resistance several times that of high manganese steel or high chromium cast iron and good impact crushing effect.
[0004] Design: At present, the impact block in high impact crushing equipment is made of high chromium cast iron. The hardness of high chromium cast iron is 50~54HRC in the cast state, 38~43HRC after annealing, and 60~67HRC after quenching. Its hardness changes with the carbon content. When the carbon content is low, the toughness is good and the hardness is low, which is suitable for working conditions with large impact loads. When the carbon content is high, the hardness is slightly higher, which is suitable for working conditions with small impact loads and shows good wear resistance. However, in actual use, it is found that when the high chromium cast iron faces the impeller speed of 1400~1600r / min and the linear speed of 70~85m / s in the high impact crushing equipment, the material driven by the high chromium cast iron impact block will rapidly increase the wear rate of the high chromium cast iron impact block, and the service life will be greatly shortened. In order to solve this difficult problem, the applicant has been continuously improving the ratio of high-chromium cast iron in the past two years, hoping to overcome this difficulty. However, after countless trials and actual tests, the wear rate of the impact block still did not achieve good results, especially the wear on the front of the impact block was very large. In desperation, the applicant embedded multiple carbide short rods on the front of the impact block, and tested the impeller speed of the high-impact crushing equipment at 1400-1600r / min and the linear speed at 70-85m / s. It was found that when the spacing between multiple carbide short rods was embedded on the front of the impact block, and the spacing between the carbide short rods was less than the diameter of the crushed material, the wear rate was greatly reduced and the service life was extended several times. After correcting the reasons, it was found that cemented carbide has a high hardness of 86-93HRA, equivalent to 69-81HRC; good hot hardness, which can reach 900-1000℃ and maintain 60HRC; good wear resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500℃, and still have a high hardness at 1000℃.
[0005] Technical solution: A cemented carbide impact block for high-impact crushing equipment, wherein the impact block has a plurality of cemented carbide rods on the front side or on the front side and the side side from top to bottom.
[0006] Compared with the background technology, the utility model embeds a carbide rod in the impact block, so that the impact resistance and wear resistance of the impact block are several times higher than that of the high-chromium cast iron impact block, and the service life is increased from 4 to 5 months in the background technology to 9 to 10 months, which brings unexpected technical effects and achieves unexpected economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a schematic diagram of the main view of a carbide impact block for high impact crushing equipment.
[0008] Figure 2 yes Figure 1 Schematic top view of . Implementation
[0009] Embodiment 1: refer to the attached Figure 1 and 2 . A cemented carbide impact block for a crushing sand making machine, wherein the impact block 1 has a plurality of cemented carbide rods 2 on the front side or on the front side and on the side from top to bottom. The spacing between the plurality of cemented carbide rods 2 on the front side or on the front side and on the side from top to bottom is less than the diameter of the crushed material. The front side of the impact block 1 has a plurality of countersunk holes spaced from top to bottom, and the countersunk holes are embedded with cemented carbide rods 2. The cemented carbide refers to a cemented carbide used for manufacturing turning tools, milling cutters, planers, drill bits, and boring tools, and the hardness of the cemented carbide is 86-93HRA, i.e., 69-81HRC; when the hot hardness is 900-1000°C, it maintains 60HRC.
[0010] Embodiment 2: Based on embodiment 1, the cemented carbide rod 2 is bonded into the countersunk hole in the impact block.
[0011] Embodiment 3: Based on Embodiment 1, the cemented carbide rod 2 is cast in the impact block 1.
[0012] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of the present utility model, these textual descriptions are only simple textual descriptions of the design concept of the present utility model, rather than limitations on the design concept of the present utility model. Any combination, addition or modification that does not exceed the design concept of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A hard alloy impact block for high impact crushing equipment, characterized by: The impact block (1) has a plurality of cemented carbide rods (2) on the front side or on the front side and on the side side from top to bottom.
2. The hard alloy impact block for high impact crushing equipment according to claim 1 is characterized in that: The front side of the impact block (1) is provided with a plurality of countersunk holes spaced apart from each other from top to bottom, and hard alloy rods (2) are embedded in the countersunk holes.
3. The hard alloy impact block for high impact crushing equipment according to claim 2 is characterized in that: The cemented carbide rod (2) is cast in the impact block (1).
4. The hard alloy impact block for high impact crushing equipment according to claim 2 is characterized in that: The cemented carbide rod (2) is bonded into the countersunk hole in the impact block (1).
5. The hard alloy impact block for high impact crushing equipment according to claim 1 is characterized in that: The impact block (1) has a plurality of carbide rods (2) on the front side or on the front side and on the side from top to bottom, and the spacing between the rods is smaller than the diameter of the material to be crushed.