C-shaped channel steel through hole stamping die and using method thereof

Abstract

The invention discloses a C-shaped channel steel through hole stamping die and a using method thereof, and relates to the technical field of channel steel machining.The C-shaped channel steel through hole stamping die comprises an upper die base and a lower die base, a punch for stamping is arranged at the lower end of the upper die base, a positioning groove is formed in the lower die base, and grooves for containing the opening side of C-shaped channel steel are symmetrically machined in the upper face and the lower face of the positioning concave die; the C-shaped steel is positioned; a through machining hole is formed in the positioning female die and located in one side of the groove, and a punch can penetrate through the machining hole. The two faces of the C-shaped channel steel are punched through cooperation of the lower die base and the upper die base, the positioning precision of the C-shaped channel steel is guaranteed through the positioning grooves, the situation that the concentricity precision of an upper through hole and a lower through hole is not enough due to dislocation or deformation of the channel steel in the punching process is avoided, one-time punching of the upper through hole and the lower through hole is completed, and the production efficiency and the machining quality are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of channel steel processing, and in particular to a C-shaped channel steel through-hole punching die and a use method thereof. Background Art

[0002] At present, the cable holes of long-distance bus air conditioners are generally made of C-shaped steel. Elliptical holes (through holes) need to be cut on the C-shaped steel to ensure the passage of the wiring harness, and protective rubber rings need to be added in the holes to protect the wiring harness from wear during vehicle driving. At present, the cutting of elliptical holes mainly relies on manual plasma cutting, which is time-consuming and labor-intensive. The cutting slag needs to be manually polished, otherwise the rubber ring cannot pass smoothly, and the cutting burrs are easy to cut the rubber ring, losing the protective effect.

[0003] In the field of mechanical processing, punching is more efficient than cutting and has better hole forming quality. However, for coaxial through holes to be connected on opposite sides of C-shaped steel, if punching is used, high positioning accuracy is required and there are many technical difficulties: for example, excessive clearance between the die openings will cause large punching burrs on the upper surface, thereby affecting the punching of the lower surface; deviations in the material positioning structure may cause the punch to break and be damaged easily; die passivation may cause deformation of the workpiece surface, affecting its use, etc.

[0004] There are many devices that can be used for punching C-shaped steel in the prior art, but most of these devices are used to process through holes only on a certain processing surface of the C-shaped steel. For example, Chinese patent CN 109590376A discloses a punching die for C-shaped steel for steel structure, which also uses punching to process elliptical holes, but it punches on the plane opposite to the opening of the C-shaped steel; for example, Chinese patent CN 112792211A discloses an automatic punching device for C-shaped channel steel for seismic support and hanger, which also punches through holes on one side of the C-shaped channel steel, but these prior arts cannot meet the processing requirements for processing C-shaped steel for passenger car air conditioning wire holes. Summary of the invention

[0005] In view of one or more deficiencies in the above-mentioned prior art, the present invention provides a C-shaped channel steel through-hole punching die and a method of using the same, which can punch the upper and lower through holes in one go, thereby improving production efficiency and appearance quality.

[0006] In order to achieve the above object, the present invention adopts one or more of the following technical solutions:

[0007] In the first aspect, a C-shaped channel steel through-hole punching tool is provided, comprising an upper die base and a lower die base, wherein the lower end of the upper die base is provided with a punch for stamping, and the lower die base is provided with a positioning groove, and the upper and lower surfaces of the positioning die are symmetrically processed with grooves for accommodating the opening side of the C-shaped channel steel to position the C-shaped steel; the positioning die is provided with a through processing hole, and the processing hole is located on one side of the groove for the punch to pass through.

[0008] As a further implementation method, a guide column is provided on the top of the upper die seat, and the guide column is used to connect with the output shaft of the stamping equipment to better ensure the verticality of the stamping process.

[0009] As a further implementation method, the punch is installed on the bottom of the upper die base through a punch fixing plate and is fixedly connected to the upper die base.

[0010] As a further implementation method, a die pad is provided between the positioning die and the lower die base, a support seat for supporting the C-shaped channel steel to be processed is installed in the die pad, and the top of the support seat is a hollow structure.

[0011] As a further implementation method, a punching pad is provided on one side of the positioning die close to the processing hole, and a gap for accommodating the C-shaped channel steel is formed between the punching pad and the positioning die, thereby further ensuring accurate positioning; preferably, the punching pad is installed above the die pad and fixedly connected to the die pad.

[0012] As a further implementation method, a punching plate is fixedly provided above the positioning die to block the material and prevent the channel steel from moving upward and deforming when the punch returns; the punching plate is fixedly connected to the positioning die.

[0013] As a further implementation method, an auxiliary punching pad with a certain thickness is provided on the top of the positioning die, the top surface of the auxiliary punching pad is in contact with the bottom of the punching plate, and the auxiliary punching pad is fixedly connected to the punching plate and the positioning die.

[0014] As a further implementation, a guide shaft is provided on one side of the lower die base, and a guide sleeve coaxially arranged with the guide shaft is installed on one side of the upper die base. The guide sleeve is slidably connected to the guide shaft to guide the stamping process.

[0015] As a further implementation method, it also includes a fixed-length structure, which includes a long board ruler, a board ruler fixing profile, a limiting movable channel steel and fixed-length mounting bolts. The long board ruler is fixedly installed on the board ruler fixing profile, and the limiting movable channel steel can slide along the long board ruler to different scales and be fixed by the fixed-length mounting bolts.

[0016] In a second aspect, a method for using the C-shaped channel steel through-hole punching die described in any one of the above items is provided, comprising:

[0017] Place and fix the C-shaped channel steel around the positioning groove in an up-and-down manner;

[0018] Start the stamping equipment and use the punch to punch through the upper and lower sides of the C-shaped channel steel from top to bottom to make through holes.

[0019] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0020] 1. The present invention punches holes on both sides of the C-shaped channel steel by cooperating with the lower die base and the upper die base, and ensures the positioning accuracy of the C-shaped channel steel by the positioning groove, thereby avoiding the misalignment or deformation of the channel steel during the punching process, which causes the upper and lower through holes to have insufficient concentricity accuracy, and realizes the punching of the upper and lower through holes in one time, thereby greatly improving the production efficiency and processing quality.

[0021] 2. The present invention further improves the positioning accuracy of the C-shaped channel steel through structures such as the die pad, support seat, punching plate and punching pad, and can effectively ensure the supporting strength of the bottom surface of the C-shaped channel steel, avoiding deformation of the channel steel when processing the upper through hole or the lower through hole. It has a simple structure and high processing quality.

[0022] 3. The present invention processes the wire holes of the C-shaped channel steel by punching instead of plasma cutting, which can effectively ensure the concentricity of the upper and lower through holes and control the punching effect, effectively improve the processing accuracy of the wire holes and the installation effect of the rubber sleeve, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] Figure 1 It is a schematic diagram of the overall structure of one or more embodiments of the present invention;

[0025] Figure 2 A schematic diagram of a C-shaped channel steel structure according to one or more embodiments of the present invention;

[0026] Figure 3 A schematic diagram of a positioning die structure according to one or more embodiments of the present invention;

[0027] Figure 4 A schematic diagram of the structure of a die pad according to one or more embodiments of the present invention;

[0028] Figure 5 A schematic diagram of the punching plate structure of one or more embodiments of the present invention;

[0029] Figure 6 A schematic diagram of the punch fixing plate structure of one or more embodiments of the present invention;

[0030] Figure 7 It is a schematic diagram of the fixed-length structure of one or more embodiments of the present invention.

[0031] In the figure: 1. Upper die base; 2. Lower die base; 3. Fixed-length structure; 4. C-shaped channel steel;

[0032] 101, punch; 102, guide post; 103, guide post pad; 104, punch fixing plate; 105, guide sleeve; 106, guide hole;

[0033] 201, positioning die; 202, groove; 203, processing hole; 204, die pad; 205, support seat; 206, punching pad; 207, punching plate; 208, punching auxiliary pad; 209, guide shaft;

[0034] 301. Long board ruler; 302. Board ruler fixing profile; 303. Position-limiting movable channel steel; 304. Fixed-length mounting bolts. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] Embodiment 1

[0038] In a typical embodiment of the present application, a C-shaped channel steel through-hole punching die is provided, such as Figure 1-7 As shown, it includes an upper die base 1 and a lower die base 2. The lower end of the upper die base 1 is provided with a punch 101 for stamping. The lower die base 2 is provided with a positioning die 201. The upper and lower surfaces of the positioning die 201 are symmetrically processed with grooves 202. The cross-section of the groove processing is "H"-shaped, which is used to accommodate the open side of the C-shaped channel steel and define the position of the C-shaped channel steel. The positioning die 201 is vertically processed with a through processing hole 203. The processing hole 203 is located on one side of the groove, so that the punch can pass through and punch the top and bottom surfaces of the C-shaped channel steel in sequence.

[0039] The stamping die of this embodiment is installed on the punch press in the workshop when in use, and the upper die base is connected to the stamping equipment. A guide column 102 is provided on the top of the upper die base 1, and the guide column 102 is used to connect with the output shaft of the stamping equipment to better ensure the verticality of the stamping process. Specifically, Figure 1 As shown, a guide post pad 103 is installed on the top of the upper die base 1, and the guide post 102 is fixedly connected to the upper die base 1 through the guide post pad 103, and the installation structure is stable.

[0040] In this embodiment, a punch fixing plate 104 for mounting a punch is provided at the lower end of the upper die base 1, and the punch fixing plate 104 is fixedly connected to the upper die base 1 by bolt connection. Figure 6 As shown, the punch fixing plate 104 is welded by a rectangular plate and a long polygonal plate. A mounting hole is opened through the punch fixing plate 104. The top of the punch 101 is fixed in the mounting hole by bolt connection, so as to be fixedly connected to the upper die base for easy maintenance and replacement.

[0041] In this embodiment, a die pad 204 is installed at the bottom of the positioning die 201 to support the positioning die and the channel steel to be processed to ensure sufficient force strength. Figure 1 As shown, the die pad 204 is arranged between the lower die base 2 and the positioning die 201. The die pad is a 3mm thick steel plate, and its bottom surface contacts the top surface of the lower die base. The positioning die 201 is placed on the top of the die pad 204, and the positioning die 201, the die pad 204 and the lower die base 2 are fixedly connected by vertically arranged threaded connectors. In order to reduce the economic cost while ensuring the support strength of the bottom surface of the channel steel to be processed, a through hole concentric with the processing hole is opened on the die pad, and a high-strength support seat 205 is installed in the through hole. The top surface of the support seat 205 contacts the bottom surface of the positioned C-shaped channel steel 4 to prevent the C-shaped channel steel from deforming during the punching process to affect the concentricity of the upper and lower through holes, thereby ensuring the processing accuracy. The support seat 205 is a hollow structure. On the one hand, it can adapt to the feed amount of the punch after punching the lower through hole of the channel steel. On the other hand, it is convenient for waste material discharge. The waste generated by stamping can fall and be discharged through the hollow structure. Correspondingly, a blanking through hole corresponding to the hollow structure is opened on the lower die seat to facilitate waste material discharge.

[0042] The support seat is made of Cr12MoV (high carbon high chromium steel) and has been flame treated to have high strength. The die pad and lower die seat can be made of 45# steel or Q235 steel, which has low production cost.

[0043] In this embodiment, in order to further ensure the positioning and clamping of the C-shaped channel steel, a punching pad 206 is provided on the side of the positioning die close to the processing hole. Figure 1As shown, there is a certain gap between the side of the punching pad 206 and the positioning die 201 for placing the C-shaped channel steel 4 to be processed, the bottom surface of the punching pad 206 contacts the die pad 204, the top surface of the punching pad 206 is higher than the height of the positioning die 201, and the punching pad 206 is fixedly connected to the die pad 204. The punching pad further limits the channel steel to be processed to improve the positioning accuracy and positioning stability of the C-shaped channel steel, avoid dislocation or deformation during the stamping process, and ensure the processing quality of the upper and lower through holes of the C-shaped channel steel.

[0044] In this embodiment, in order to prevent the punch from driving the channel steel upward and causing deformation during the return stroke, a punch plate 207 is provided on the top of the positioning die. Figure 1 As shown, the punching plate 207 is fixed above the positioning die and the punching pad, wherein, since the positioning die and the bottom surface of the punching plate need to accommodate the top surface of the through hole to be processed on the C-shaped channel steel during processing, a punching auxiliary pad 208 with a certain thickness is arranged on the top of the side of the positioning die away from the processing hole, and the top surface of the punching auxiliary pad 208 contacts the bottom surface of the punching plate 207. On the other side, the top surface height of the punching pad 206 is higher than the positioning die 201 and contacts the bottom surface of the punching auxiliary plate 208, thereby forming a stable support for the punching plate in the horizontal direction. A through hole for the punch to pass through is provided on the punching plate, and the cross-sectional size of the through hole is smaller than the size of the top surface of the through hole on the C-shaped channel steel, which can prevent the C-shaped channel steel from moving upward and avoid deformation caused by the upward movement of the channel steel when the punch returns.

[0045] In the present embodiment, on one side of the positioning die, the punching plate, the auxiliary punching pad, the positioning die, the die pad and the lower die base are fixedly connected together from top to bottom by threaded connectors, and on the other side, the punching plate, the punching pad, the die pad and the lower die base are fixedly connected from top to bottom by threaded connectors, which can better ensure the coaxiality of the process holes of the positioning die and the through holes of other parts, so that the punch can be pressed down smoothly and ensure the concentricity of the upper through hole and the lower through hole of the C-shaped channel steel after processing, thereby improving the processing quality of the through holes to meet the requirements of the air conditioning wire holes of the bus roof frame.

[0046] In this embodiment, in order to further ensure the verticality and concentricity of the upper and lower through holes during stamping, a guide shaft 209 is provided on one side of the lower die base, and a guide sleeve 105 coaxial with the guide shaft is installed on one side of the upper die base. A guide hole 106 cooperating with the guide shaft 209 is provided in the guide sleeve 105. During the processing, the guide shaft 209 is inserted into the guide hole 106 and slidably connected with the guide sleeve 105 to guide the stamping process, which is beneficial to improving the processing quality.

[0047] In addition, this embodiment also includes a sizing structure 3, which is used to accurately determine the processing position of the through hole on the C-shaped channel steel. Specifically, Figure 7As shown, the length-fixing structure 3 includes a long board ruler 301, a board ruler fixing profile 302, a position-limiting movable channel steel 303 and a length-fixing mounting bolt 304, wherein the long board ruler 301 is fixedly mounted on the board ruler fixing profile 302, and the position-limiting movable channel steel 303 can slide along the long board ruler 301 to different scales and be fixed by the length-fixing mounting bolt 304. In this embodiment, the length-fixing structure is a detachable design and is bolted to the mold base.

[0048] When in use, according to the size of the drawing, place the plate ruler fixed profile 302 at the blanking position of the stamping die, one end of the long plate ruler 301 abuts against the root of the punching auxiliary pad 208, move the limit movable channel steel 303 until the size indicated on the drawing, stop moving, determine the through hole processing position, use the fixed-length mounting bolts 304 to fix the limit movable channel steel 303, start the machine tool, and process. After the first punching, it is necessary to verify whether the upper and lower punching is qualified according to the drawing, and whether the coaxiality deviation meets the process requirements. After confirmation, batch punching is carried out.

[0049] Embodiment 2

[0050] In another typical embodiment of the present invention, a method for using the C-shaped channel steel through-hole punching die in Embodiment 1 is provided, comprising:

[0051] Place and fix the C-shaped channel steel around the positioning groove in an up-and-down manner;

[0052] Start the stamping equipment and use the punch to punch through the upper and lower sides of the C-shaped channel steel from top to bottom to make through holes.

[0053] Specifically, the C-shaped channel steel is positioned using the positioning groove, the open side of the C-shaped channel steel contacts the H-shaped groove, the upper and lower planes of the through hole to be processed of the C-shaped channel steel are respectively fitted with the top surface and bottom surface of the positioning groove, and the other side of the C-shaped channel steel is limited by the punching pad, and the C-shaped channel steel is placed between the punching pad and the positioning groove. After placement, the bottom surface of the C-shaped channel steel to be processed is supported by the support seat below to ensure the force strength and avoid deformation of the channel steel when punching the through hole.

[0054] Specifically, after the stamping equipment is started, the guide column drives the upper die seat to move vertically downward and then drives the punch to punch downward. In one processing, the punch penetrates the upper and lower planes of the C-shaped channel steel to be processed from top to bottom, thereby punching out concentric upper and lower through holes at one time. The processing efficiency is high, and the punched through holes are of high quality with few burrs, which is convenient for installing protective rubber rings.

[0055] Embodiment 3

[0056] In a third typical embodiment of the present invention, a method for installing a C-shaped channel steel through-hole punching die of Example 1 is provided, including installation of the punching die, positioning and tightening of the limit movable channel steel, maintenance and adjustment of the die before punching, installation and fixing of the C-shaped channel steel, and trial punching, specifically, including the following steps:

[0057] (1) Installation of stamping die: Adjust the height of the press slide according to the closing height of the stamping die, so that when the slide is at the lowest position, the distance between its bottom surface and the workbench is greater than the closing height of the die. Install the stamping die on the stamping machine, raise the slide to the highest position, and place the die at the pressure center of the press; observe whether the workpiece or waste can fall down. Move the flywheel to slowly lower the slide, install the die handle in the die handle hole of the slide, stop at the lowest position (bottom dead center), and then manually adjust the height of the slide to ensure that the top surface of the upper die seat and the bottom surface of the slide are close to each other without gap, and tighten the die handle with a pressure block or a tightening screw; finally, tighten the lower die with a pressure plate or bolts, and tighten the bolts alternately one by one, and do not loosen them.

[0058] (2) Positioning and tightening of the limit movable channel steel: Check the drawings, move the limit movable channel steel to the corresponding position according to the drawing dimensions, and tighten the fixed-length mounting bolts to effectively fix the limit movable channel steel. Measure the distance from the positioning to the die mouth, and the deviation from the theory is ≤2mm.

[0059] (3) Maintenance and adjustment of stamping dies before punching: For punching dies with guide structures, lubricating oil should be injected into the guide sleeve before each batch of pressing; use special tools to place the test die material based on the positioning pins or positioning lines on the die, turn on the power and test punch. Manually adjust the height of the slider on the punch press and adjust the depth of the upper punch entering the lower die opening. Just cut off the upper and lower sides of the C-shaped steel, and do not let the upper punch enter the lower pad too deep.

[0060] (4) Installation and test punching of C-type channel steel: Install and debug the C-type channel steel positioning, test punch parts with specified materials, measure the size of the first piece's aperture, the distance from the end to see if it meets the requirements of the drawing, and check for defects such as burrs and deformation.

[0061] The stamping die installation method provided in this embodiment further provides a guarantee for the process improvement of the air-conditioning wire holes on the roof longitudinal beams of buses, which can improve the punching quality and efficiency and improve the consistency of parts processing.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Those skilled in the art should understand that the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A C-shaped channel steel through-hole punching die, characterized in that: It includes an upper die base and a lower die base, wherein a punch for stamping is provided at the lower end of the upper die base, and a positioning groove is provided on the lower die base. The upper and lower surfaces of the positioning die are symmetrically processed with grooves for accommodating the opening side of the C-shaped channel steel to position the C-shaped steel; a through processing hole is provided on the positioning die, and the processing hole is located on one side of the groove for the punch to pass through.

2. A C-shaped channel steel through-hole punching die as claimed in claim 1, characterized in that: A die pad is provided between the positioning die and the lower die seat, a support seat for supporting the C-shaped channel steel to be processed is installed in the die pad, and the top of the support seat is a hollow structure.

3. A C-shaped channel steel through-hole punching die as claimed in claim 1, characterized in that: A punching pad is provided on one side of the positioning die close to the processing hole, and a gap for accommodating the C-shaped channel steel is formed between the punching pad and the positioning die.

4. A C-shaped channel steel through-hole punching die as claimed in claim 3, characterized in that: The punching pad is installed above the die pad and is fixedly connected to the die pad.

5. A C-shaped channel steel through-hole punching die as claimed in claim 1, characterized in that: A punching plate is fixedly provided above the positioning die, and the punching plate is fixedly connected to the positioning die.

6. A C-shaped channel steel through-hole punching die as claimed in claim 5, characterized in that: An auxiliary punching pad with a certain thickness is provided on the top of the positioning die, the top surface of the auxiliary punching pad is in contact with the bottom of the punching plate, and the auxiliary punching pad is fixedly connected to the punching plate and the positioning die.

7. A C-shaped channel steel through-hole punching die as claimed in claim 1, characterized in that: The punch is installed on the bottom of the upper die base through a punch fixing plate and is fixedly connected to the upper die base.

8. A C-shaped channel steel through-hole punching die as claimed in claim 1, characterized in that: A guide shaft is provided on one side of the lower die seat, and a guide sleeve coaxially arranged with the guide shaft is installed on one side of the upper die seat, and the guide sleeve is slidably connected with the guide shaft.

9. A C-shaped channel steel through-hole punching die as claimed in claim 1, characterized in that: It also includes a fixed-length structure, which includes a long board ruler, a board ruler fixing profile, a limiting movable channel steel and fixed-length mounting bolts. The long board ruler is fixedly installed on the board ruler fixing profile, and the limiting movable channel steel can slide along the long board ruler to different scales and be fixed by the fixed-length mounting bolts.

10. A method for using a C-shaped channel steel through-hole punching die as claimed in any one of claims 1 to 9, characterized in that: include Place and fix the C-shaped channel steel around the positioning groove in an up-and-down manner; After starting the stamping equipment, use the punch to penetrate the upper and lower surfaces of the C-shaped channel steel from top to bottom to process through holes.

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