CN102974701B - Forming die for machining method for high-strength transverse 8-shaped parts - Google Patents

Abstract

The molding die used for the processing method of high-strength "∞" shaped parts includes an upper die, an upper die fixed on the upper die, a lower die and a lower die fixed on the lower die, the upper die is provided with an upper die cavity, The lower mold is provided with a lower mold cavity, and the upper mold cavity and the lower mold cavity cooperate to form a "∞"-shaped inner cavity; on the lower mold, the cavities on both sides of the middle position of the lower mold cavity are respectively provided with guide plates And a pair of positioning rods movable relative to the guide plate, the positioning rods are stuck between the guide plate and the inner wall of the metal pipe. The invention solves the problems that the processing accuracy and strength of the existing molds are difficult to guarantee, and the service life of the prepared "∞" shaped parts is not long, and better meets the needs of customers.

Description

Forming die for processing method of high-strength "∞" shaped parts

technical field

The invention belongs to the field of metal stamping processing, and in particular relates to a forming die used in the processing method of high-strength "∞" shaped parts (such as chain inscribed).

Background technique

The "∞"-shaped part produced by the processing method of the present invention is an important connecting part on the chain, which is mainly used in high-power mechanical chains. Its precision and strength determine the quality and life of the entire chain. The existing processing methods are divided into welding type and casting type. The welding type process steps are flat strip cutting→pre-folding→primary bending→secondary bending→correction→welding sealing. The process of this process is long, the process is troublesome, and the delivery is often not up to the requirements, and the welding performance is poor, the workpiece is not easy to meet the technical requirements, and the life of the chain cannot be guaranteed. If the casting method is adopted, not only the processing cost is high, but also the efficiency is low. After thin-wall casting, defects such as air holes and pits that seriously affect the strength are prone to appear. In order to overcome the above problems, the inventor invented a method of heat-treating a radially cross-sectioned metal tube and stamping it on a press to obtain a high-strength "∞"-shaped piece.

Contents of the invention

The object of the present invention is to provide a molding die used in the processing method of high-strength "∞" shaped parts, which solves the problem that the processing accuracy and strength of existing molds are difficult to guarantee and the service life of the obtained "∞" shaped parts is not long.

The technical scheme adopted by the present invention to solve the technical problem is: the molding die used for the processing method of high-strength "∞" shaped parts, including an upper template, an upper mold fixed on the upper template, a lower template and a lower template fixed on the lower template The upper mold is provided with an upper mold cavity, and the lower mold is provided with a lower mold cavity. The upper mold cavity and the lower mold cavity cooperate to form a "∞"-shaped inner cavity; the lower mold is adapted to the middle position of the lower mold cavity. The cavities on both sides are respectively provided with a guide plate and a pair of positioning rods movable relative to the guide plate, and the positioning rods are clamped between the guide plate and the inner wall of the metal pipe.

Preferably, a support column is provided on the outside of the guide plate, and a pressure spring for controlling the travel of the support column is provided between the support column and the lower template, and the positioning rod is placed on the support column; further, the lower mold cavity is a semi-"∞" shaped The groove is provided with a convex rib in the middle of the groove, and the guide plate is located at both ends of the convex rib.

In order to ensure the aperture and pitch of the chain link and improve the machining accuracy, the diameter of the positioning rod matches the aperture of the "∞" shaped piece.

In order to facilitate unloading, a set of first punching rods for returning parts is fixed on the upper template; a set of second punching rods for returning parts is fixed on the lower template, and a set of second punching rods for rebounding The rubber splint; the first punching rod and the second punching rod are compatible with the positioning rod.

In order to ensure smoother processing, the guide plate is integrally formed with the lower mold.

Beneficial effects of the present invention: the positioning rod is penetrated into the metal pipe, and when the upper mold goes down, the positioning rod rolls down along the edge of the guide plate, and finally falls into the inner cavity of the "∞" shape. This mold solves the problem of existing molds. The precision and strength are guaranteed, and the service life of the "∞" shaped parts is not long; further, a support column for positioning the positioning rod is provided on the outside of the guide plate to ensure a more stable stamping process and facilitate the operation of the staff; the diameter of the positioning rod Compatible with the hole diameter of the "∞" shaped part, which ensures the hole diameter and pitch of the chain link and improves the processing accuracy; a set of punching rods are set on the upper and lower templates to effectively prevent the "∞" shaped part from being stuck in the On the upper mold or the lower mold, it is convenient for unloading.

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is the schematic diagram of existing welding type "∞" font. 1 is the weld.

Fig. 2 is a schematic diagram of the working state of the press of the present invention. The figure schematically shows the positional relationship of the guide plate, the positioning rod and the metal pipe.

Fig. 3 is a schematic diagram of the working state of the press of the present invention. The figure schematically shows the positional relationship between the positioning rod and the guide plate, and the shape of the high-strength "∞" shaped piece.

Fig. 4 is a schematic diagram of the molding die with supporting columns of the present invention when the press starts to work. The figure schematically shows the positional relationship between the positioning rod and the support column.

FIG. 5 is a partial cross-sectional view of FIG. 4 . The figure shows the position of the compression spring.

FIG. 6 is a partially enlarged view of FIG. 4 . The figure shows the shape of the guide plate.

Detailed ways

Embodiment 1, please refer to Fig. 1 to 3 together, be used for the molding die of high-strength "∞" font processing method, comprise upper template 11, be fixed on the upper mold 12 on the upper template 11, lower template 21 and be fixed on the following The lower mold 22 on the template 21, the upper mold 12 is provided with an upper mold cavity 13, the lower mold 22 is provided with a lower mold cavity 23, and the upper mold cavity 13 and the lower mold cavity 23 cooperate to form a "∞" shaped inner cavity; on the lower mold 22, the cavities on both sides of the middle position of the lower mold cavity 23 are respectively provided with a guide plate 3 and a pair of positioning rods 4 movable relative to the guide plate 3, and the positioning rods 4 are stuck between the guide plate 3 and the metal Between the inner walls of the tube 7; when the upper mold 12 is descending, the positioning rod 4 can roll down along the edge of the guide plate 3, and finally fall into the "∞"-shaped inner cavity.

Furthermore, the lower mold cavity 23 is a semi-"∞"-shaped groove, and a rib 24 is arranged in the middle of the groove, and the guide plates 3 are located at both ends of the rib 24 .

In order to ensure the aperture and pitch of the chain link and improve the machining accuracy, the diameter of the positioning rod 4 is adapted to the aperture of the "∞" shaped part 8 .

In order to facilitate unloading, a group of first beating rods 14 for returning parts is fixed on the upper template 11; The rubber splint 26 for the rebound of the material rod 25; the first beating rod 14 and the second beating rod 25 are adapted to the positioning rod 4.

In order to ensure smoother processing, the guide plate 3 is integrally formed with the lower mold 22 .

Place the heat-treated metal tube 7 on the lower mold 22 of the molding die, and clamp the positioning rod 4 between the guide plate 3 and the inner wall of the metal tube 7, start the button, and the upper mold 12 moves downward. When the upper mold 12 presses against the metal tube At 7 o'clock, the metal pipe 7 is deformed, and the positioning rod 4 rolls down along the edge of the guide plate 3, and finally falls into the inner cavity of the "∞" shape, and the molds are molded. The invention solves the difficulty in guaranteeing the processing accuracy and strength of the existing mold, greatly improves the tensile load of the "∞" shaped part, prolongs the service life of the product, and meets the needs of customers.

Example 2,

Please also refer to Figures 4 to 6. A support column 5 is also provided on the outside of the guide plate 3. A compression spring 6 for controlling the stroke of the support column 5 is provided between the support column 5 and the lower template 21. The positioning rod 4 is placed on the support column. 5, all the other are with embodiment 1.

Place the heat-treated metal tube 7 on the lower mold 22 of the molding die, clamp the positioning rod 4 between the guide plate 3 and the inner wall of the metal tube 7, and place the positioning rod 4 on the support column 5, start the button, and the upper mold 12 goes down, when the upper die 12 presses the metal tube 7, the support column 5 goes down under the action of the compression spring 6, and the metal tube 7 is deformed at the same time, the positioning rod 4 rolls down along the edge of the guide plate 3, and finally falls into the "∞ "In the inner cavity of the font, the mold is molded. The invention solves the difficulty in guaranteeing the processing precision and strength of the existing molds, greatly improves the tensile load of the "∞" shaped parts, prolongs the service life of the product, and at the same time increases the support column structure, which plays a better guiding role and meets the requirements of the mold. Large-scale production requirements.

Claims (6)

1. for the shaping mould of high strength " ∞ " font part processing method, comprise cope match-plate pattern, be fixed on the patrix on cope match-plate pattern, lower bolster and the counterdie be fixed on lower bolster, described patrix is provided with upper cavity, counterdie is provided with lower mode cavity, it is characterized in that: described upper cavity and lower mode cavity coordinate the internal cavity of formation " ∞ " font; On counterdie, the both sides, front and back in adaptive lower mode cavity centre position are respectively arranged with a guide plate, and being mounted with between two guide plates can along a pair backstay of guide plate activity, and this backstay is stuck between guide plate and inner wall of metal tube.

2. as claimed in claim 1 for the shaping mould of high strength " ∞ " font part processing method, it is characterized in that: outside described guide plate, be also provided with support column, be provided with the stage clip controlling support column stroke between support column and lower bolster, described backstay is placed on the support columns.

3. as claimed in claim 1 for the shaping mould of high strength " ∞ " font part processing method, it is characterized in that: described lower mode cavity is the groove of one and half " ∞ " font, be provided with convex tendon in the middle of groove, described guide plate is positioned at the two ends of convex tendon.

4. the shaping mould for high strength " ∞ " font part processing method as described in any one of claims 1 to 3, is characterized in that: the diameter of described backstay is suitable with the aperture of " ∞ " font part.

5. as claimed in claim 4 for the shaping mould of high strength " ∞ " font part processing method, it is characterized in that: described cope match-plate pattern is fixed with one group of first dnockout rod for back pieces; Lower bolster be provided with one group for back pieces second dnockout rod, and one group make second dnockout rod resilience rubber clamping plate; Described first dnockout is excellent and the second dnockout rod is suitable with backstay.

6., as claimed in claim 5 for the shaping mould of high strength " ∞ " font part processing method, it is characterized in that: described guide plate is guide plate integrated with counterdie.