A method for detecting the taper deviation of the width adjustment mechanism of the mold in a continuous casting machine

Abstract

The present invention relates to a method for detecting the taper deviation of the mold width adjustment mechanism of a continuous casting machine, belonging to the technical field of steelmaking continuous casting, and comprising the following steps: S1. Under the normal locking state of the mold width adjustment mechanism, place two backing plates with a hardness less than that of the mold copper plate under the lower openings of the two copper plates on both sides, and place a hydraulic jack between the two backing plates to apply pressure to the two backing plates; S2. Pressurize the hydraulic jack to 7-8 Mpa, and use a taper gauge to detect the surface taper of the two copper plates on both sides; S3. Continue to pressurize the hydraulic jack to 8-9 MPa, and use a taper gauge to detect the surface taper of the two copper plates on both sides; S4. Repeat steps S2-S3 for n times. If the data difference ≤ 0.3, the taper of the mold width adjustment mechanism is stable; if the data difference > 0.3, the taper of the mold width adjustment mechanism is unstable and the idle running gap needs to be adjusted. The present invention can intervene in advance in the phenomenon of taper deviation of the mold width adjustment mechanism during mold maintenance, ensuring the stable and reasonable taper of the mold during the continuous casting production process.

Description

Technical Field

[0001] The present invention belongs to the technical field of steelmaking continuous casting, and relates to a method for detecting the taper running of the width adjustment mechanism of a continuous caster mold. Background Art

[0002] The mold is an important equipment for continuous casting production. In order to reduce the air gap formed between the surface of the cast slab and the mold during continuous casting, the inner cavity of the mold is designed to have a larger upper opening and a slightly smaller lower opening, forming an inverted taper. The taper is usually strictly set according to the steel grade and the section of the continuous caster. After being set, it is not allowed to change during normal production, otherwise it will affect heat transfer, resulting in an overly thin and uneven thickness of the billet shell, triggering a breakout accident, damaging the equipment, reducing the operating rate of the continuous caster and the service life of the mold, and directly affecting the enterprise's benefits. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method for detecting the taper running of the width adjustment mechanism of a continuous caster mold, so as to achieve early intervention in the taper running phenomenon and ensure the stable and reasonable taper of the mold during the continuous casting production process.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A method for detecting the taper running of the width adjustment mechanism of a continuous caster mold, comprising the following steps:

[0006] S1. Under the normal locking state of the width adjustment mechanism of the mold, place two pads with a hardness less than that of the mold copper plate under the lower openings of the two copper plates on both sides, and place a hydraulic jack between the two pads to apply pressure to the two pads;

[0007] S2. Pressurize the hydraulic jack to 7 - 8 Mpa, and use a taper gauge to detect the surface taper of the two copper plates on both sides;

[0008] S3. Continue to pressurize the hydraulic jack to 8 - 9 MPa, and use a taper gauge to detect the surface taper of the two copper plates on both sides;

[0009] S4. Repeat steps S2 - S3 for n times. If the data difference ≤ 0.3, the taper of the width adjustment mechanism of the mold is stable; if the data difference > 0.3, the taper of the width adjustment mechanism of the mold is unstable, and the idle running gap needs to be adjusted.

[0010] Optionally, the adjustment of the idle running gap includes the following steps: Under the normal locking state of the width adjustment mechanism of the mold, first slowly rotate the upper and lower width adjustment mechanisms of the mold in the reverse direction to the limit point, use a taper gauge to detect the surface taper of the two copper plates on both sides, and record the reverse idle running circle number and the taper; then slowly rotate the upper and lower width adjustment mechanisms of the mold in the forward direction to the limit point, use a taper gauge to detect the surface taper of the two copper plates on both sides, and record the forward idle running circle number and the taper; then open the end cover of the width adjustment mechanism of the mold, tighten the wire ring to eliminate the idle running gap, and the adjustment amount is the reverse idle running circle number - the forward idle running circle number.

[0011] Optionally, the hydraulic jack is pressurized by a hydraulic cylinder connected thereto.

[0012] Optionally, the material of the backing plate is a sleeper.

[0013] Optionally, n = 3.

[0014] The beneficial effects of the present invention are as follows: it is possible to intervene in advance in the conicity deviation phenomenon of the mold width adjustment mechanism during the maintenance of the mold, ensuring the stable and reasonable conicity of the mold during the continuous casting production process.

[0015] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. Detailed Embodiments

[0016] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0017] A method for detecting the conicity deviation of the mold width adjustment mechanism of a continuous casting machine, comprising the following steps:

[0018] S1. In the normal locked state of the mold width adjustment mechanism, place two backing plates with a hardness less than that of the mold copper plate under the lower openings of the two copper plates on both sides, and place a hydraulic jack between the two backing plates to apply pressure to the two backing plates;

[0019] S2. Pressurize the hydraulic jack to 7 - 8 Mpa, and use a conicity gauge to detect the conicity of the two copper plate surfaces on both sides;

[0020] S3. Continue to pressurize the hydraulic jack to 8 - 9 MPa, and use a conicity gauge to detect the conicity of the two copper plate surfaces on both sides;

[0021] S4. Repeat steps S2 - S3 for n times. If the data difference ≤ 0.3, the conicity of the mold width adjustment mechanism is stable; if the data difference > 0.3, the conicity of the mold width adjustment mechanism is unstable and the idle running gap needs to be adjusted.

[0022] The present invention can intervene in advance in the conicity deviation phenomenon of the mold width adjustment mechanism during the maintenance of the mold, ensuring the stable and reasonable conicity of the mold during the continuous casting production process.

[0023] Optionally, the adjustment of the idling gap includes the following steps: Under the normal locking state of the mold width adjustment mechanism, first slowly rotate the upper and lower mold width adjustment mechanisms in the reverse direction to the limit point, use a taper gauge to detect the taper of the copper plate surfaces on both sides, and record the reverse idling rotation count and the taper; then slowly rotate the upper and lower mold width adjustment mechanisms in the forward direction to the limit point, use a taper gauge to detect the taper of the copper plate surfaces on both sides, and record the forward idling rotation count and the taper; then open the end cover of the mold width adjustment mechanism, tighten the wire loop for adjusting the taper of the copper plate surface to eliminate the idling gap, and the adjustment amount is the reverse idling rotation count - the forward idling rotation count; the hydraulic jack is pressurized through the hydraulic cylinder connected thereto; the material of the backing plate is selected as tough and elastic sleeper; n = 3.

[0024] Embodiment

[0025] A method for detecting the taper running of the mold width adjustment mechanism of a continuous casting machine includes the following steps:

[0026] 1. Under the normal locking state of the mold width adjustment mechanism (the clamping device of the mold width adjustment mechanism is in the clamping state), use a sleeper to support the lower openings of the copper plates on both sides, and place a hydraulic jack connected to the hydraulic cylinder in the middle.

[0027] 2. Pressurize the hydraulic jack to 7 - 8 Mpa, and use a taper gauge to detect the taper of the copper plate surfaces on both sides.

[0028] 2. Continue to pressurize the hydraulic jack to 8 - 9 MPa, open the clamping cylinder, and use a taper gauge to detect the taper of the copper plate surfaces on both sides again.

[0029] 4. Repeat steps 2 - 3 three times. If the data difference ≤ 0.3, the taper of the mold width adjustment mechanism is stable; if the data difference > 0.3, the taper of the mold width adjustment mechanism is unstable and the idling gap needs to be adjusted.

[0030] 5. Under the normal locking state of the mold width adjustment mechanism, manually and slowly rotate the upper and lower mold width adjustment mechanisms in the reverse direction to the limit point, use a taper gauge to detect the taper of the copper plate surfaces on both sides, and record the reverse idling rotation count and the taper.

[0031] 6. Under the normal locking state of the mold width adjustment mechanism, manually and slowly rotate the upper and lower mold width adjustment mechanisms in the forward direction to the limit point, use a taper gauge to detect the taper of the copper plate surfaces on both sides, and record the forward idling rotation count and the taper.

[0032] 7. Open the end cover of the mold width adjustment mechanism, tighten the wire loop for adjusting the mechanical gap of the width adjustment mechanism to eliminate the idling gap, and the adjustment amount is the reverse idling rotation count - the forward idling rotation count.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A method for detecting the taper running of the width adjustment mechanism of a continuous casting mold, characterized in that: It includes the following steps: S1. Under the normal locking state of the mold width adjustment mechanism, place two backing plates with hardness less than that of the mold copper plate at the lower openings of the two copper plates on both sides, and place a hydraulic jack between the two backing plates to apply pressure to the two backing plates; S2. Pressurize the hydraulic jack to 7 - 8 MPa, and use a taper gauge to measure the taper of the two copper plate surfaces on both sides; S3. Continue to pressurize the hydraulic jack to 8 - 9 MPa, and use a taper gauge to measure the taper of the two copper plate surfaces on both sides; S4. Repeat steps S2 - S3 for n times. If the data difference ≤ 0.3, the taper of the mold width adjustment mechanism is stable; if the data difference > 0.3, the taper of the mold width adjustment mechanism is unstable and the idle running clearance needs to be adjusted; The adjustment of the idle running clearance includes the following steps: Under the normal locking state of the mold width adjustment mechanism, first slowly rotate the upper and lower mold width adjustment mechanisms in the reverse direction to the limit point, use a taper gauge to measure the taper of the two copper plate surfaces on both sides, and record the reverse idle running turns and the taper; then slowly rotate the upper and lower mold width adjustment mechanisms in the forward direction to the limit point, use a taper gauge to measure the taper of the two copper plate surfaces on both sides, and record the forward idle running turns and the taper; then open the end cover of the mold width adjustment mechanism, tighten the wire loop to eliminate the idle running clearance, and the adjustment amount is the reverse idle running turns - the forward idle running turns.

2. The method for detecting the taper running of the mold width adjustment mechanism of a continuous casting machine according to claim 1, wherein: The hydraulic jack is pressurized through the hydraulic cylinder connected to it.

3. A method for detecting the taper running of the width adjustment mechanism of the continuous casting machine mold according to claim 1, characterized in that: The material of the backing plate is a sleeper.

4. A method for detecting the taper running of the width adjustment mechanism of a continuous casting machine mold according to claim 1, characterized in that: n=3。