A kind of material belt limiting device for rolling in online pre-punching die and rolling production line

Abstract

The utility model relates to a kind of material belt limiting device and roll production line for roll-in online pre-punching die, material belt limiting device includes die holder, the die holder is located the both sides of material belt and is equipped with several first insert slot, the first insert slot is fixed with limit block by first bolt, the top of the limit block is fixed with ball bearing by second bolt, the outer side surface of the ball bearing is in abutment with the material belt.The utility model limit block top is fixed with ball bearing by second bolt, the outer side surface of ball bearing is in abutment with material belt, ball bearing and material belt are rolled friction, not easy to wear, can effectively prevent material belt to shift;Limit block is fixed in first insert slot by first bolt, by the limiting of first insert slot, limit block is not easy to shift, can further prevent material belt to shift, to ensure the accuracy of hole position on material belt.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts processing technology, and in particular relates to a strip limiting device and a roll forming production line for use in online pre-punching dies for roll forming. Background Technology

[0002] The application of high-strength steel roll forming technology in the automotive field has shown a rapid growth trend in recent years, especially in improving the strength of the vehicle body structure and reducing weight. Some models have already adopted martensitic steel with a tensile strength of over 1500MPa and achieved complex cross-sections through roll forming. However, it also faces many technical challenges. For example, the number of holes such as mounting holes, drainage holes, anti-misalignment holes, and positioning holes on roll-formed products is increasing. These holes are difficult to process offline after roll forming (or even cannot be laser-processed), or require several sets of offline post-processing stamping dies to complete the processing of all holes on the roll-formed product. To save costs, the characteristics of roll forming are usually utilized. The steel strip is pre-punched on the entire roll forming production line before roll forming. That is, the steel strip first enters the pre-punching die on the punching equipment for punching. After punching, the steel strip enters the roll forming machine for roll forming, thereby completing the processing of all holes on the roll-formed product, achieving the goal of saving time, cost, and labor.

[0003] The positional stability of the strip in the width direction within the pre-punching die directly affects the positional accuracy of the holes on the roll-formed product. To limit strip movement in the width direction, a common method is to fix several limiting blocks on both sides of the strip on the die fixing plate of the pre-punching die using bolts. However, this method has the following problems: 1) Direct contact and friction between the high-strength steel strip and the limiting blocks can cause severe wear and strip movement; 2) Too many holes in the steel strip can lead to vibrations in the punching machine during stamping, causing screws to loosen and resulting in displacement of the limiting blocks and strip movement; 3) Once the limiting blocks wear or the screws loosen, causing strip movement, it is difficult to manually adjust the strip's correct position in the width direction online. To achieve positional stability of the strip in the width direction within the pre-punching die, a strip limiting device for online pre-punching dies in roll forming is needed to meet the needs of roll-formed products with pre-punching processes in various projects. Utility Model Content

[0004] The main purpose of this invention is to provide a material strip limiting device and a roller pressing production line for use in online pre-punching dies for roller pressing, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A strip limiting device for online pre-punching die for roll forming includes a die fixing plate. The die fixing plate has several first insert slots on both sides of the strip. Limiting blocks are fixed in the first insert slots by first bolts. A ball bearing is fixed to the top of the limiting block by a second bolt. The outer side of the ball bearing abuts against the strip.

[0007] Preferably, each first insert slot on the die fixing plate has a second insert slot on both sides, the second insert slot is connected to the first insert slot, and an auxiliary stop block is fixed in the two second insert slots by a third bolt. The lower part of the auxiliary stop block is located in the two second insert slots, and the bottom of the auxiliary stop block has a clearance groove corresponding to the position of the limiting block. The upper part of the auxiliary stop block has an extension towards the material strip, and the extension is located above the material strip.

[0008] Preferably, the side of the first insert groove away from the material strip has an assembly gap with the limiting block.

[0009] A roll forming production line includes, from left to right, a punching machine, a feeder / puller, and a roll forming machine. The punching machine is equipped with a pre-punching die, and the pre-punching die is equipped with the aforementioned strip limiting device.

[0010] This utility model provides a strip limiting device and a roll forming production line for use in online pre-punching dies for roll forming, which has the following beneficial effects.

[0011] 1. The top of the limiting block of this utility model is fixed with a ball bearing by a second bolt. The outer side of the ball bearing abuts against the material belt. The ball bearing and the material belt roll and rub against each other, which is not easy to wear and can effectively prevent the material belt from moving. The limiting block is fixed in the first insert groove by a first bolt. Through the limiting of the first insert groove, the limiting block is not easy to move, which can further prevent the material belt from moving and thus ensure the accuracy of the hole position on the material belt.

[0012] 2. The upper part of the auxiliary stop has an extension that faces the material belt. The extension is located above the material belt and can prevent the material belt from tilting upwards, thereby further ensuring the accuracy of the hole position on the material belt. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the material strip limiting device of this utility model installed on a punch press.

[0014] Figure 2 This is an exploded view of the material belt limiting device of this utility model.

[0015] Figure 3 This is a schematic diagram of the material strip limiting device of this utility model.

[0016] In the figure: 1. Material strip limiting device; 2. Die fixing plate; 3. Material strip; 4. First insert groove; 5. First bolt; 6. Limiting block; 7. Second bolt; 8. Ball bearing; 9. Second insert groove; 10. Third bolt; 11. Auxiliary stop block; 12. Alternating groove; 13. Extension; 14. Gasket; 15. Punch press equipment. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Reference Figure 1-3This utility model provides a material strip limiting device 1 for a roll forming online pre-punching die, including a die fixing plate 2. The die fixing plate 2 has a plurality of first insert grooves 4 on both sides of the material strip 3. Limiting blocks 6 are fixed in the first insert grooves 4 by first bolts 5. A ball bearing 8 is fixed to the top of the limiting block 6 by second bolts 7. The outer side of the ball bearing 8 abuts against the material strip 3.

[0021] The top of the limiting block 6 of this utility model is fixed with a ball bearing 8 by a second bolt 7. The outer side of the ball bearing 8 abuts against the material belt 3. The ball bearing 8 rolls and rubs against the material belt 3, which is not easy to wear and can effectively prevent the material belt 3 from moving. The limiting block 6 is fixed in the first insert groove 4 by a first bolt 5. By limiting the first insert groove 4, the limiting block 6 is not easy to move, which can further prevent the material belt 3 from moving and thus ensure the accuracy of the hole position on the material belt 3.

[0022] Depending on the size of the mold length, each pre-punching mold typically has 2 to 4 such strip limiting devices 1 installed on the left and right sides of the strip width 3.

[0023] As a preferred embodiment, each first insert groove 4 on the die fixing plate 2 has a second insert groove 9 on both sides. The second insert groove 9 is connected to the first insert groove 4. An auxiliary stop block 11 is fixed in the two second insert grooves 9 by a third bolt 10. The lower part of the auxiliary stop block 11 is located in the two second insert grooves 9. The bottom of the auxiliary stop block 11 has a clearance groove 12 corresponding to the position of the limiting block 6 to ensure that the two sides of the auxiliary stop block 11 are fixed to the second insert grooves 9. The upper part of the auxiliary stop block 11 has an extension 13 facing the material strip 3. The extension 13 is located above the material strip 3 to prevent the material strip 3 from tilting upwards and further ensure the accuracy of the hole position on the material strip 3.

[0024] As a preferred embodiment, the side of the first insert groove 4 away from the material strip 3 has an assembly gap with the limiting block 6. Before locking the first bolt, in order to prevent the limiting block 6 from running, a superimposed thin shim 14 is inserted into the assembly gap to eliminate the movement gap of the limiting block 6 in the first insert groove 4.

[0025] This utility model also improves a roll forming production line, which includes, from left to right, a punching machine 15, a feeding / pulling machine and a roll forming machine. The punching machine 15 is equipped with a pre-punching die, and the pre-punching die is equipped with the aforementioned strip limiting device 1.

[0026] In actual production, the specific steps include:

[0027] Step 1: On the entire roll forming line, the feeding / pulling machine installed on the right side of the punching machine 15 will pull the steel material strip 3 into the pre-punching mold installed on the punching machine at a certain step distance.

[0028] Step 2: The feeder / puller pulls the steel strip 3 into the pre-punching die. With the abutment of the outer sides of several rolling bearings on both sides in the width direction, the strip 3 can flow smoothly and quickly into the entire pre-punching die.

[0029] Step 3: After the feeding / pulling machine completes one step of automatic feeding (pulling) of the material belt 3, the stamping equipment begins stamping;

[0030] Step 4: The stamping equipment completes one stamping operation;

[0031] Step 5: The roll forming machine behind the roll forming line will send instructions to the feeder / puller installed on the right side of the punching machine 15 based on the length calculation of the encoder device;

[0032] Step 6: The feeding / pulling machine automatically pulls the material strip 3 again by one step, which will pull the punched material strip 3 out of the mold to the roll forming machine to participate in roll forming. At the same time, there is another steel material strip 3 with one step in the pre-punching mold waiting for the punch to punch, thus producing roll forming products in sequence.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A strip limiting device for use in a roll forming online pre-punching die, characterized in that, The device includes a die fixing plate, on which a plurality of first insert slots are provided on both sides of the strip. Limit blocks are fixed in the first insert slots by first bolts, and ball bearings are fixed to the top of the limit blocks by second bolts. The outer side of the ball bearings abuts against the strip.

2. The strip limiting device for online pre-punching die for roll forming according to claim 1, characterized in that: Each first insert slot on the die fixing plate has a second insert slot on both sides. The second insert slot is connected to the first insert slot. An auxiliary stop block is fixed in each of the two second insert slots by a third bolt. The lower part of the auxiliary stop block is located in the two second insert slots. The bottom of the auxiliary stop block has a clearance groove corresponding to the position of the limiting block. The upper part of the auxiliary stop block has an extension towards the material strip. The extension is located above the material strip.

3. The strip limiting device for online pre-punching die for roll forming according to claim 1, characterized in that: The side of the first insert groove away from the material strip has an assembly gap with the limiting block.

4. A strip limiting device for use in an online pre-punching die for roll forming, as described in claim 1, characterized in that... 。 5. A roller pressing production line, characterized in that, From left to right, the equipment includes a punching machine, a feeding / pulling machine, and a roll forming machine. The punching machine is equipped with a pre-punching die, and the pre-punching die is equipped with a strip limiting device as described in any one of claims 1-4.

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