Pipe material cold heading die punching device

Abstract

The utility model provides a pipe material cold heading die punching device which is used for solving the problems that in the prior art, pipe expanding machining procedures are tedious, and efficiency is low. The punching die device comprises an inner core and a cutting device, the inner core is driven by a linear pushing device, the inner core is sleeved with a notching sleeve, a gap is formed between the inner core and the notching sleeve, a plurality of right-trapezoid punching knives are arranged on the side wall of the notching sleeve in a penetrating mode, a plurality of grooves are formed in the side wall of the inner core, and lower die blocks are arranged in the grooves in a sliding mode. The end, away from the linear pushing device, of the lower die block abuts against the side wall of the groove through a stamping spring, the other end of the lower die block is matched with the groove to form a stamping cavity, a pushing device is arranged in the stamping cavity, the outer side of the notching sleeve is sleeved with a stamping sleeve, the inner side of the stamping sleeve is provided with an extrusion face parallel to the bevel edge face, and a connecting plate penetrates through the fixing plate and is connected with the inner core. According to the utility model, a plurality of stamping knives are simultaneously pushed by one stamping sleeve to move radially, so that a plurality of notches can be synchronously processed, the processing efficiency is obviously improved, and the processing time is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold heading processing technical field, especially a kind of pipe material cold heading die device. BACKGROUND

[0002] Pipe expansion is one of the core components of metal expansion screw, used to realize the fixed function of expansion screw. In the prior art, the pipe expansion of expansion bolt is usually cut into the required length and the gap for expansion by using metal cutting tools such as angle grinder or laser cutting machine, but the processing procedure of angle grinder is complicated and depends on manual operation, which is prone to burr and size deviation, and also causes difficult recycling of waste materials, resulting in resource waste and difficult to meet the mass production demand; while the laser cutting equipment is high in cost and long in processing cycle, and the heat generated by laser is prone to cause deformation of pipe material. SUMMARY

[0003] The utility model provides a kind of pipe material cold heading die device, solve the problem of complicated processing procedure and low efficiency of pipe expansion in prior art.

[0004] The technical scheme of the utility model is implemented as follows: a kind of pipe material cold heading die device, including inner core and cutting device, inner core is driven by linear drive device, inner core is equipped with the punch groove sleeve of outer sleeve, gap is equipped between inner core and punch groove sleeve, the side wall of punch groove sleeve is provided with multiple right trapezoidal punch knives, the end of punch knife away from inner core is bevel face, the end of punch knife close to linear drive device is short side face, the side wall of inner core is equipped with several grooves, lower module is slidably arranged in groove, the moving path of lower module is parallel to the moving path of inner core, the end of lower module away from linear drive device is abutted with the side wall of groove by punch spring, the other end cooperates with groove to form punch chamber, pusher device is arranged in punch chamber, punch sleeve is arranged on the outside of punch groove sleeve, the inside of punch sleeve is provided with extrusion face parallel to bevel face, the end of punch groove sleeve is fixedly connected with fixed plate, extrusion column is fixed on the outside wall of inner core, the end of punch sleeve close to linear drive device is fixed with connecting plate, connecting plate penetrates fixed plate, long round hole is arranged in the side wall of connecting plate, reset spring is fixed in long round hole close to punch groove sleeve, reset spring is abutted with extrusion column, when extrusion column compresses reset spring, punch knife corresponds to punch chamber one by one.

[0005] Further, the side wall of inner core away from linear drive device is provided with annular cutting groove, cutting device includes drive ring corresponding to cutting groove, the inside of drive ring is provided with multiple telescopic devices, the movable end of telescopic device is rotatably connected with circular cutting blade, cutting blade cooperates with cutting groove. The telescopic device is existing pneumatic telescopic rod or hydraulic telescopic rod. By setting annular cutting groove and corresponding cutting device, cutting can be carried out immediately after pipe material stamping is completed, which greatly improves production efficiency.

[0006] Further, the side wall of the recess is provided with a limiting sliding groove, the end of the limiting sliding groove is provided with a baffle, the pushing device comprises a pushing plate, the pushing plate slides along the limiting sliding groove, the recess is communicated with a plurality of accommodating grooves, the pushing spring is fixedly connected in the accommodating groove, and the movable end of the pushing spring is abutted against the pushing plate. Since the corner waste cleaning process is closely combined with the stamping process, the whole device can quickly clean the corner waste and reset after completing a stamping operation, thereby guaranteeing the continuity and stability of production.

[0007] Further, the extrusion surface of the stamping sleeve is provided with a magnet layer, and the magnet can attract the punch. The punch is moved by the pulling force of the magnet layer, thereby reducing the maintenance difficulty and cost.

[0008] Further, the driving ring is a gear ring, the outer side of the gear ring is engaged with a driving gear, and the driving gear is driven by a driving motor. The automatic cutting process reduces the physical labor of the operator, reduces the labor intensity, and reduces the time and energy of manual operation.

[0009] Further, the included angle between the bevel surface and the inner core axis is 10-45 degrees. By controlling the degree of the included angle, the normal pressure between the contact surfaces is reduced when the parts are relatively moved, thereby reducing the friction coefficient, reducing the friction force and wear, and prolonging the service life of the parts.

[0010] The technical scheme can produce the beneficial effects that: the utility model discloses a stamping sleeve simultaneously drives multiple punches to move radially, realizes the synchronous processing of multiple missing grooves, avoids the low-efficiency problem of traditional one-by-one alignment, significantly improves the processing efficiency and shortens the processing time. The cooperation of the reset spring and the stamping spring makes the pressure of the punch gradually release when the inner core is pulled out, avoids the punch bounce or displacement caused by the sudden rebound of the spring, reduces the risk of damage of the punch due to stress mutation, and guarantees the processing precision. The pushing device can automatically push out the punch and the corner waste, combined with the reset action of the stamping sleeve, realizes the automatic cleaning of the inner core and the stamping cavity, reduces manual intervention and labor intensity, and also avoids the interference of residual waste on subsequent processing. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0012] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0013] Figure 2It is the internal section view before punching;

[0014] Figure 3 It is the internal section view when punching;

[0015] Figure 4 It is the explosion view of the utility model;

[0016] Figure 5 It is the three-dimensional section view of the inner core;

[0017] Figure 6 It is Figure 5 It is the local enlarged schematic view of A in the middle.

[0018] Wherein: 1, inner core, 2, punch, 3, bevel surface, 4, recess, 5, lower module, 6, punching spring, 7, punching cavity, 8, punching sleeve, 9, punch sleeve, 10, pushing device, 11, extrusion surface, 12, extrusion column, 13, fixed plate, 14, connecting plate, 15, return spring, 16, cutting groove, 17, driving ring, 18, telescopic device, 19, cutting piece, 20, limit sliding slot, 21, baffle, 22, pushing plate, 23, containing groove, 24, pushing spring, 25 driving gear, 26, driving motor. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] As Figures 1-6The utility model provides a kind of pipe material cold heading die set, including inner core 1 and cutting device, inner core 1 is driven by linear pusher, inner core 1 is equipped with punch groove sleeve 9, and gap is equipped between inner core 1 and punch groove sleeve 9, the side wall of punch groove sleeve 9 is equipped with multiple right trapezoidal punch knives 2, the end of punch knife 2 far from inner core 1 is bevel surface 3, and the end of punch knife 2 close to linear pusher is short side face, the side wall of inner core 1 is equipped with several grooves 4, and lower module 5 is slid in groove 4, and the moving path of lower module 5 is parallel with the moving path of inner core 1, and the end of lower module 5 far from linear pusher is abutted with the side wall of groove 4 by punch spring 6, and another end is formed punch chamber 7 with groove 4 cooperation, and punch chamber 7 is equipped with pusher 10, and the outside of punch groove sleeve 9 is equipped with punch sleeve 8, and the inside of punch sleeve 8 is equipped with extrusion face 11 parallel with bevel surface 3, and the end of punch groove sleeve 9 is fixedly connected with fixed plate 13, and the outside wall of inner core 1 is fixed with extrusion column 12, and the end of punch sleeve 8 close to linear pusher is fixed with connecting plate 14, and connecting plate 14 penetrates fixed plate 13, and the side wall of connecting plate 14 is equipped with long round hole, and long round hole is fixed with return spring 15 close to punch groove sleeve 9 in one end, and return spring 15 is abutted with extrusion column 12, when extrusion column 12 compresses return spring 15, punch knife 2 is one-to-one corresponding with punch chamber 7.The linear pusher is driven by the reciprocating mechanism of cold header.

[0021] In use, the pipe material is inserted into the gap between the inner core 1 and the punching sleeve 9, and then the linear pushing device is started to make the inner core 1 penetrate into the pipe material. During the movement of the inner core 1, the extrusion column 12 of the side wall of the inner core 1 gradually compresses the reset spring 15, and at the same time, the reset spring 15 pushes the punching sleeve 8 to move away from the extrusion column 12. During the movement of the punching sleeve 8, the extrusion surface 11 provides a downward thrust for the bevel surface 3 of the punch 2, and the bevel surface 3 converts the axial movement of the punching sleeve 8 into the radial movement of the punch 2, so that the punch 2 cooperates with the punching cavity 7 to complete the processing of the notched groove of the pipe material. By simultaneously pushing multiple punches 2 into the punching groove through the punching sleeve 8, a linear pushing device can simultaneously complete the processing of multiple notched grooves, greatly improving the processing efficiency and reducing the processing time. After the notched groove processing is completed, the inner core 1 is pulled out through the linear pushing device. During the pulling out of the inner core 1, the punching lower module 5 abuts against the punch 2, and the punch 2 is used to compress the punching spring 6. At this time, the inner core 1 can be gradually pulled out. During the pulling out of the inner core 1, the extrusion column 12 gradually reduces the pressure on the reset spring 15, avoiding the bounce or displacement of the punch 2 due to the sudden loss of pressure, thereby reducing the risk of damage to the punch 2. Subsequently, the extrusion column 12 drives the punching sleeve 8 away from the punching sleeve 9 through the long circular hole. When the pressure of the punching sleeve 8 on the punch 2 is reduced, the material pushing device 10 can push the punch 2 out of the punching cavity 7. After the inner core 1 is completely pulled out of the punching sleeve 9, the edge material clamped between the punching sleeve 9 and the inner core 1 is pushed out by the material pushing device 10, realizing the automatic cleaning of the inner core 1. This not only avoids the influence of the edge material on subsequent processing, but also reduces the time and labor intensity of manual cleaning, and at the same time, the punching spring 6 drives the punching lower module 5 to reset. After the pipe material cold heading and punching is completed, the pipe material is cut off by the cutting device, and the processed pipe material is taken out, and then waiting for the next punching operation.

[0022] As shown in Figures 2-4 , the inner core 1 is provided with an annular cutting groove 16 on the side wall away from the linear pushing device. The cutting device includes a driving ring 17 corresponding to the cutting groove 16. The inner side of the driving ring 17 is provided with multiple telescopic devices 18. The movable end of the telescopic device 18 is rotationally connected with a circular cutting blade 19. The cutting blade 19 is matched with the cutting groove 16. The telescopic device 18 is a existing pneumatic telescopic rod or hydraulic telescopic rod. The cutting blade 19 is a prior art. When the pipe material groove punching is completed, the telescopic device 18 is started to make the cutting blade 19 abut against the side wall of the pipe material, and continuously provide pressure for the cutting blade 19 by the telescopic device 18. The sharp edges of the cutting groove 16 and the cutting blade 19 guide the stress concentration of the pipe material, which helps the cutting blade 19 to cut the pipe material more smoothly and evenly. At the same time, the operator rotates the driving ring 17 to drive the cutting blade 19 to rotate along the side wall of the pipe material, thereby realizing efficient and smooth cutting of the pipe material.

[0023] As shown in Figure 5 ,6 As shown in the figure, the side wall of the groove 4 is provided with a limiting chute 20, the end of the limiting chute 20 is provided with a baffle 21, the pushing device 10 includes a pushing plate 22, the pushing plate 22 slides along the limiting chute 20, the groove 4 is communicated with a plurality of accommodating grooves 23, the pushing spring 24 is fixedly connected in each of the accommodating grooves 23, and the movable end of the pushing spring 24 is in abutment with the pushing plate 22. During the punching process, the corner scraps generated by punching are pushed into the groove 4 by the punch 2, at the same time, the punch 2 compresses the pushing spring 24 through the pushing plate 22, the corner scraps are accommodated through the groove 4, and the reset of the pushing spring 24 is limited through the punch 2 and the punching sleeve 9, when the inner core 1 is pulled out after the punching is completed, the pushing spring 24 pushes the pushing plate 22 under the action of the elastic force, and the corner scraps in the groove 4 are pushed out of the groove 4, so that the corner scraps are automatically pushed out, manual cleaning is not needed, the production efficiency is greatly improved, the stability and accuracy of the pushing plate 22 in the sliding process are ensured through the setting of the baffle 21, the reliability of the pushing device 10 is ensured, and the spring can be prevented from tilting and failing through the setting of the accommodating groove 23.

[0024] As shown in the figure, Figures 2-3 The extrusion surface 11 of the punching sleeve 8 is provided with a magnet layer, and the magnet can attract the punch 2. After the punching is completed, the inner core 1 is pulled out of the punching sleeve 9, and the extrusion column 12 drives the punching sleeve 8 to move upwards through the long circular hole. After the punching sleeve 8 moves towards the linear pushing device, a gap is formed between the punching sleeve 8 and the punch 2. The magnet layer can exert a certain pulling force on the punch 2 through the attraction force, so that the punch 2 gradually separates from the punching groove. The magnet layer enables the punch 2 to more smoothly and naturally separate from the punching groove after the punching is completed.

[0025] As shown in the figure, Figure 1 The driving ring 17 is a gear ring, the outer side of the gear ring is engaged with a driving gear 25, and the driving gear 25 is driven by a driving motor 26. The driving motor 26 is prior art. The driving motor 26 can provide stable and accurate rotating power, ensures that the gear ring rotates at a constant speed, and thus ensures the accuracy and consistency of the cutting of the pipe material and improves the quality of the product. The cooperation of the gear ring and the driving motor 26 enables the cutting process of the pipe material to be automated, manual rotation of the driving ring 17 is not needed, the production efficiency is greatly improved, and the labor cost is reduced.

[0026] The included angle between the bevel surface 3 and the axis of the inner core 1 is 10-45 degrees. The included angle between the bevel surface 3 and the axis of the inner core 1 is set in the range of 10-45 degrees, which is helpful to reasonably distribute the pressure received by the punch 2, to optimize the stress distribution of the whole device, to effectively reduce the friction between components, to reduce the wear speed of the components, and to prolong the service life of the components.

[0027] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tube stock cold heading die set comprising an inner core (1) and a cutting device, the inner core (1) being driven by a linear pusher device, characterized in that: The inner core (1) is provided with a punching sleeve (9), and a gap is arranged between the inner core (1) and the punching sleeve (9). The side wall of the punching sleeve (9) is provided with a plurality of punching knives (2) in the shape of a right trapezoid. The end of the punching knife (2) away from the inner core (1) is a bevel face (3), and the end of the punching knife (2) close to the linear pushing device is a short side face. The side wall of the inner core (1) is provided with a plurality of grooves (4), and each of the grooves (4) is slidably provided with a lower module (5). The moving path of the lower module (5) is parallel to the moving path of the inner core (1). The end of the lower module (5) away from the linear pushing device is abutted against the side wall of the groove (4) through a punching spring (6), and the other end cooperates with the groove (4) to form a punching cavity (7). The punching cavity (7) is provided with a pushing device (10). The outer side of the punching sleeve (9) is provided with a punching sleeve (8), and the inner side of the punching sleeve (8) is provided with an extrusion face (11) parallel to the bevel face (3). The end of the punching sleeve (9) is fixedly connected with a fixed plate (13), and the outer side wall of the inner core (1) is fixedly provided with an extrusion column (12). The end of the punching sleeve (8) close to the linear pushing device is fixedly provided with a connecting plate (14), the connecting plate (14) penetrates through the fixed plate (13), the side wall of the connecting plate (14) is provided with an oblong hole, the end of the oblong hole close to the punching sleeve (9) is fixedly provided with a reset spring (15), the reset spring (15) is abutted against the extrusion column (12), and when the extrusion column (12) compresses the reset spring (15), the punching knife (2) corresponds to the punching cavity (7).

2. A tube stock cold header die set as defined in claim 1 wherein: The side wall of the inner core (1) away from the linear pushing device is provided with an annular cutting groove (16), and the cutting device comprises a driving ring (17) corresponding to the cutting groove (16). The inner side of the driving ring (17) is provided with a plurality of telescopic devices (18), the movable end of the telescopic device (18) is rotatably connected with a circular cutting blade (19), and the cutting blade (19) cooperates with the cutting groove (16).

3. A tube stock cold header die set as defined in claim 1 wherein: The side wall of the groove (4) is provided with a limiting sliding groove (20), and the end of the limiting sliding groove (20) is provided with a baffle (21). The pushing device (10) comprises a pushing plate (22) sliding along the limiting sliding groove (20). The groove (4) is communicated with a plurality of accommodating grooves (23), and the accommodating groove (23) is fixedly connected with a pushing spring (24). The movable end of the pushing spring (24) is abutted against the pushing plate (22).

4. A tube stock cold header die set as defined in claim 1 wherein: The extrusion face (11) of the punching sleeve (8) is provided with a magnet layer, and the magnet can attract the punching knife (2).

5. A tube stock cold header die set as defined in claim 2 wherein: The driving ring (17) is a gear ring, the outer side of the gear ring is engaged with a driving gear (25), and the driving gear (25) is driven by a driving motor (26).

6. A tube stock cold header die set as defined in claim 1 wherein: The angle between the bevel face (3) and the axis of the inner core (1) is 10-45 degrees.

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