A baffle structure for the transport chain of a plate shearing machine and its installation method

Abstract

The present invention discloses a baffle structure for a transport chain of a plate shearing machine and an installation method thereof. The baffle structure includes a baffle, an adjusting plate and a base. A counterbore for inserting a fixing bolt is machined on the side surface of the baffle. The diameter of the counterbore is larger than the diameter of the step of the fixing bolt head, and the depth is deeper than the depth of the step of the fixing bolt head. A through hole adapted to the fixing bolt is machined on the base. Threads are machined above the baffle and above the base, and through holes adapted to the threads above the baffle and the base are machined on the adjusting plate. The present invention can minimize the breakage of the transport chain of the plate shearing machine to the greatest extent, reduce the safety risks for workers to handle faults and manually pull out the cut heads of steel plates, greatly save the spare parts cost, improve the production efficiency, and have remarkable economic benefits.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal processing machinery and relates to a plate shearing machine. Background Art

[0002] The plate shearing machine is the main equipment in a medium and thick plate factory. Its function is to shear the longitudinal or transverse edges of a steel plate so that the length and width of the steel plate meet the requirements of users. During the shearing process, the longitudinal or transverse steel plate cut heads generated must be promptly transported out to the waste pit outside the shearing machine; otherwise, production cannot proceed.

[0003] As Figure 1 shown is the original structure diagram of the transport chain baffle of the plate shearing machine: The cut head of the sheared steel plate falls from the lower tool rest onto the transport chain and is transported by the transport chain to the waste pit outside the shearing machine. To ensure that the steel plate cut head just falls on the transport chain, a baffle is installed on the other side. The baffle is fixed to a base through fixing bolts. To reduce the impact force on the baffle, a buffer pad is installed between the baffle and the base. The gap between the bottom surface of the baffle and the upper surface of the transport chain must meet the requirements. For example, when producing a 5-mm-thick steel plate, the gap should be ensured to be 3 mm. If it is greater than 3 mm, the steel plate cut head is likely to get stuck between the transport chain and the baffle, causing the transport chain to break or requiring manual intervention to remove the edge; if the gap is less than 3 mm, it is likely that the baffle will hang on the transport chain, causing the transport chain to break. In the use process of this baffle structure, about 3 times per year for each equipment, the thread of the fixing screw on the baffle side is damaged or the screw runs outwards, causing the baffle to hang down and resulting in the breakage of the transport chain. Each time the transport chain breaks and needs to be replaced, it takes 18 hours, and the unit price of a transport chain is 80,000 yuan, resulting in huge losses, seriously affecting production and also posing safety hazards. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an improved structure of the transport chain baffle of the plate shearing machine and its installation method.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A structure of the transport chain baffle of a plate shearing machine, characterized by comprising a baffle, an adjusting plate, and a base. A counterbore for inserting a fixing bolt is machined on the side surface of the baffle; the fixing bolt is a single-headed bolt with a step; the diameter of the counterbore is larger than the diameter of the step of the fixing bolt head, so that there is a margin for adjusting the height when the baffle is installed and fixed; the depth of the counterbore is deeper than the depth of the step of the fixing bolt head, so that when the baffle is installed and fixed, the step of the fixing bolt head sinks in the counterbore and is flush with the side plane of the baffle; a through hole adapted to the fixing bolt is machined on the base; threads are machined above the baffle and above the base, and through holes adapted to the threads above the baffle and the base are machined on the adjusting plate.

[0007] The installation method of the above baffle structure is as follows: First, initially position and connect the baffle and the base with fixing bolts, then initially position and connect the adjusting plate with the baffle and the base with screws. Then, adjust the gap between the bottom surface of the baffle and the upper surface of the transport chain of the shearing machine by adding or removing shims under the adjusting plate until the set value is reached. Finally, tighten the bolts and screws to firmly connect the baffle, the adjusting plate, and the base.

[0008] The present invention improves the existing baffle structure of the transport chain of the shearing machine, which can effectively ensure that the gap between the bottom surface of the baffle and the upper surface of the transport chain meets the requirements, and solves the problems that the cut head of the steel plate of the existing shearing machine is easily stuck between the transport chain and the baffle or the baffle is easily hung on the transport chain, resulting in the fracture of the transport chain. At the same time, the present invention also improves the fixing bolts, changing the existing double-headed bolts to single-headed bolts with steps, which solves the problems that the side threads of the original baffle are easily damaged or the bolts are easily run outwards, causing the baffle to hang down and resulting in the fracture of the transport chain.

[0009] After the implementation of the present invention, it can minimize the fracture of the transport chain of the shearing machine to the greatest extent, reduce the safety risks of workers dealing with faults and manually pulling out the cut heads of steel plates, greatly save the spare parts cost, improve the production efficiency, and have remarkable economic benefits. Description of the Drawings

[0010] Figure 1 is the structural diagram of the baffle of the existing transport chain of the shearing machine;

[0011] Figure 2 is the structural diagram of the improved baffle of the transport chain of the shearing machine of the present invention.

[0012] Among them, 1: screw; 2: baffle; 3: buffer pad; 4: adjusting plate; 5: base; 6: fixing bolt; 7: transport chain Detailed Embodiments

[0013] The present invention will be further described in detail below in conjunction with specific embodiments and the drawings.

[0014] As Figure 2 shown, the baffle structure of the transport chain of the shearing machine mainly involves two aspects of improvement:

[0015] 1. Improve the fixing bolts of the baffle: Change the original double-headed bolts to single-headed bolts with steps. One end of this bolt has a round step with a diameter of φ80mm and a length of 33mm. This step can ensure that the bolt will not break and will not run towards the nut, and can ensure that the baffle is fixed without loosening.

[0016] 2. Add an adjusting plate for adjusting the height of the baffle: Drill holes and tap M30 screws 1 above the baffle and the base, and connect the baffle 2 to the base 5 through the screw 1 and the adjusting plate 4. Adjust the gap between the bottom surface of the baffle and the upper surface of the conveying chain by adding or reducing gaskets (hard gaskets, such as aluminum metal sheets, not shown in the figure) below the adjusting plate. When the gap is adjusted to 3 mm, tighten the screws on the adjusting plate. At this time, the height is determined. After the baffle height is determined, tighten the baffle fixing bolt 6 in place and equip it with double nuts to prevent loosening. Since the baffle gap is determined and the baffle fixing bolt will not break or loosen, the baffle will not interfere with the conveying chain, and the steel plate cut head will not get stuck between the conveying chain and the baffle.

[0017] Specifically, process a counterbore with a diameter of φ81 mm and a depth of 35 mm on the side of the removed old baffle. The diameter of the counterbore is 1 mm larger than the step diameter φ80 mm of the fixed bolt head, aiming to facilitate the baffle to have a margin for height adjustment; the depth of the counterbore is 2 mm deeper than the step depth of the fixed bolt head, aiming to make the step of the fixed nut sink in the hole and be basically flush with the side plane of the baffle, so that the steel plate cut head will not get stuck in the hole. Tap M30 threads on the upper part of the baffle, and also tap M30 threads on the upper part of the base. Process an adjusting plate 4 with a thickness of 40 mm, drill a φ33 hole at the thread assembly position, and process the screw 4 for fixing the adjusting plate.

[0018] The installation adjustment includes the following steps: preliminary positioning of the baffle - height adjustment - tightening of the screws. First, insert the fixing bolt 6 into the counterbore on the baffle and the through hole on the base to preliminarily position and connect the baffle 2 and the base 5. Then, use the screw 1 to preliminarily position and connect the adjusting plate 4 with the baffle 2 and the base 5. Then, adjust the gap between the bottom surface of the baffle 2 and the upper surface of the shearing machine conveying chain 7 by adding or reducing gaskets below the adjusting plate 4. The specific method for adjusting the gap is as follows: Use a feeler gauge to measure the gap between the bottom surface of the baffle and the upper surface of the conveying chain. If the gap is greater than 3 mm, loosen the screw 1 and the fixing bolt 6, and add a gasket with an appropriate thickness between the adjusting plate and the baffle. Since the diameter of the counterbore is designed with a margin for baffle height adjustment, the baffle can be moved downward; if the gap is less than 3 mm, add a gasket between the adjusting plate and the base. Since the diameter of the counterbore is designed with a margin for baffle height adjustment, the adjusting plate can drive the baffle upward until the gap between the bottom surface of the baffle 2 and the upper surface of the shearing machine conveying chain 7 reaches 3 mm, and then tighten the bolts and screws to firmly connect the baffle 2, the adjusting plate 4, and the base 5.

Claims

1. A baffle structure for the transport chain of a plate shearing machine, characterized in that It includes a baffle plate, an adjusting plate and a base. A counterbore for inserting a fixing bolt is machined on the side of the baffle plate; the fixing bolt is a single-headed bolt with a step; the diameter of the counterbore is larger than the diameter of the step of the fixing bolt head, so that there is a margin for adjusting the height when the baffle plate is installed and fixed; the depth of the counterbore is deeper than the depth of the step of the fixing bolt head, so that when the baffle plate is installed and fixed, the step of the fixing bolt head sinks in the counterbore and is flush with the side plane of the baffle plate; a through hole adapted to the fixing bolt is machined on the base; threads are machined above the baffle plate and above the base, and through holes adapted to the threads above the baffle plate and the base are machined on the adjusting plate; when installing the baffle plate structure of the shearing machine conveying chain, first use the fixing bolt to preliminarily position and connect the baffle plate and the base, then use screws to preliminarily position and connect the adjusting plate with the baffle plate and the base, and then adjust the gap between the bottom surface of the baffle plate and the upper surface of the shearing machine conveying chain to the set value by adding or reducing gaskets under the adjusting plate, and finally tighten the bolts and screws to firmly connect the baffle plate, the adjusting plate and the base.

2. The baffle structure for the transport chain of a plate shearing machine according to claim 1, characterized in that The diameter of the counterbore is 1 mm larger than the diameter of the step of the fixing bolt head.

3. The baffle structure for the transport chain of a plate shearing machine according to claim 1, characterized in that The depth of the counterbore is 2 mm deeper than the depth of the step of the fixing bolt head.

4. The baffle structure for the transport chain of a plate shearing machine according to claim 1, characterized in that The gap between the bottom surface of the baffle plate and the upper surface of the shearing machine conveying chain needs to reach 3 mm.

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