Open side large stroke press with deep drawn product trimming structure

Abstract

The application discloses an open type large-stroke press machine with a deep-drawing product trimming structure, which comprises a press machine body, an upper die and a lower die arranged on the press machine body; a forming rod is arranged on the upper die, and a forming cavity matched with the forming rod is arranged on the lower die; the forming rod comprises a rod body and a rotating sleeve matched with the rod body; the relative fixation or rotation between the rod body and the rotating sleeve is realized through a plurality of inlaid pieces; the rod body and the rotating sleeve are both provided with sliding grooves matched with the inlaid pieces; the upper die is provided with a driving ring for driving the inlaid pieces to vertically slide; the driving ring is provided with a driving groove for driving the inlaid pieces to displace away from the center of the rod body, and the lower end of the inlaid piece is provided with a polishing groove; the application provides a synchronous trimming structure for the deep-drawing product after stamping of the open type large-stroke press machine, which greatly reduces the abrasion between the upper opening and the side wall of the lower die and between the inner ring of the upper opening and the wall of the core rod, and saves the polishing time.

Description

Technical Field

[0001] This invention relates to the field of stamping press technology, and in particular to an open-type large-stroke press with a trimming structure for deep-drawn products. Background Technology

[0002] Open-type large-stroke presses are used for products requiring large-stroke stamping to form, such as round steel barrels and other products with deep drawing strokes, like round battery casings and stainless steel barrels. When forming deep-drawn products, these presses employ single or multiple forming processes. In multi-step forming processes, the first step involves a single flaring and depth stamping of the barrel, while simultaneously removing excess material. The second step then further reduces the barrel's diameter and increases its depth.

[0003] During the aforementioned stamping process, the upper opening of the barrel body forms large burrs and flash after the first stamping process. As a result, when the upper opening comes into contact with the cavity wall of the lower die during the second stamping process, it will cause significant friction and scratches, thus accelerating the wear of the lower die. At the same time, in order to improve efficiency, the continuous stamping process is a continuous process, and the existing process is difficult to trim the upper opening of the barrel body formed in the previous processes in a timely manner. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing an open-type large-stroke press with a trimming structure for deep-drawn products. This solves the problem of simultaneous trimming of the upper opening during the first forming process of deep-drawn products, thereby reducing friction between the upper opening and the lower die in subsequent processes, reducing wear on the lower die cavity, and extending the die life.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an open-type large-stroke press with a deep-drawing product trimming structure, comprising a press body and an upper die and a lower die disposed on the press body.

[0006] In the above scheme, preferably, the upper mold is provided with a forming rod, and the lower mold is provided with a forming cavity that cooperates with the forming rod;

[0007] The forming rod includes a rod body and a rotating sleeve that is integrated with it;

[0008] The rod and the rotating sleeve are relatively fixed or rotated by a number of inserts;

[0009] Both the rod and the rotating sleeve are provided with sliding grooves that mate with the inserts;

[0010] The upper mold is provided with a drive ring for vertically sliding drive inserts;

[0011] The drive ring is provided with a drive groove that drives the insert to move away from the center of the rod, and the lower end of the insert is provided with a grinding groove.

[0012] After the rotating sleeve separates from the rod and rotates relative to it, it drives the insert to move along the drive groove. When the insert is on the side away from the center of the rod, the top of the part is polished.

[0013] In the above scheme, preferably, the upper mold is equipped with a motor, and the rotating sleeve is equipped with a synchronous pulley that is connected to the motor for transmission.

[0014] In the above scheme, preferably, the insert is provided with an extension rod, one end of which is connected to the insert, and the other end is provided with a locking block that slides and engages with the drive groove.

[0015] In the above scheme, preferably, the upper mold is provided with lifting push rods symmetrically connected to the drive ring.

[0016] In the above scheme, preferably, the drive ring is provided with a plurality of contact rods corresponding to the number of inserts, and the synchronous pulley is provided with a top block that cooperates with the contact rods;

[0017] The drive groove includes a first track groove corresponding to the position of the contact rod and a second track groove for connecting adjacent first track grooves.

[0018] In the above scheme, preferably, a transition slope is provided between the two ends of the top block and the synchronous wheel.

[0019] In the above scheme, preferably, the lifting push rod is provided with a sliding rod that cooperates with the drive ring. One end of the sliding rod is provided with a first limiting plate, and the other end passes through the drive ring and is provided with a second limiting plate. A drive spring is provided between the second limiting plate and the drive ring.

[0020] In the above scheme, preferably, the top block and the contact rod are both made of wear-resistant alloy.

[0021] In the above scheme, preferably, the grinding groove is an arc-shaped groove, and the diameter of the central arc of the arc-shaped groove is the same as the diameter of the upper opening of the part after it is formed.

[0022] In the above scheme, preferably, the drive ring is provided with a guide sleeve that cooperates with the contact rod, and a buffer spring is provided between the contact rod and the synchronous pulley.

[0023] The beneficial effects of this invention are as follows: This invention provides a synchronous trimming structure for deep-drawn products after stamping using an open-type large-stroke press. This structure allows the upper edge of the deep-drawn product to be trimmed and polished simultaneously after the first stamping process, thereby reducing wear between the lower die and the upper die mandrel in subsequent processes. It significantly reduces wear between the upper and lower die sidewalls and between the upper inner ring and the mandrel wall, while also saving polishing time. Polishing is performed simultaneously with the continuous stamping process. Ultimately, this invention improves the service life of the die without reducing production efficiency, which is beneficial for energy conservation and emission reduction. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the press of the present invention.

[0025] Figure 2 This is a schematic diagram of the upper mold structure of the present invention viewed from below.

[0026] Figure 3 For the present invention Figure 2 Schematic diagram of the structure in mid-section.

[0027] Figure 4 This is a schematic diagram of the exploded structure of the forming rod of the present invention.

[0028] Figure 5 This is a cross-sectional view of the drive ring structure of the present invention.

[0029] Figure 6 This is a schematic diagram of the three-dimensional structure of the inlay component of the present invention.

[0030] Figure 7 This is a schematic diagram of the mating structure of the insert and the drive ring of the present invention.

[0031] Figure 8 This is a planar motion trajectory diagram of the insert of the present invention at the drive ring. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figures 1-8 .

[0033] An open-type large-stroke press with a deep-drawing product trimming structure includes a press body 1 and an upper die 2 and a lower die 101 disposed on the press body 1. The press body 1 is an open-type large-stroke press, which is used to stamp deep-drawing products. In this embodiment, the stamping of a deep-drawing stainless steel barrel is taken as an example.

[0034] The upper mold 2 is fixed on the stamping slide of the press body 1, and the lower mold 101 is fixed on the base of the press body 1. The upper mold 2 is provided with a forming rod 201, and the lower mold 101 is provided with a forming cavity 102 that cooperates with the forming rod 201. After the stainless steel plate is placed on the lower mold 101, the steel plate is stamped and stretched by the forming rod 201 of the upper mold 2 to form a deep-drawn stainless steel barrel. The stainless steel barrel usually needs to be formed by reducing the diameter of the barrel through multiple stamping and stretching.

[0035] To ensure a smooth top edge of the barrel after molding, thus reducing wear on the mold for the next process, this embodiment includes a mechanism on the forming rod 201 for synchronously grinding the top edge of the barrel after a single molding. Taking the first stamping process as an example, the forming rod 201 specifically includes a rod body 202 and a rotating sleeve 203 integrated therewith. The rod body 202 is fixed to the upper mold 2. The lower end of the rod body 202 is the forming section, and the upper part of the forming section is the rod body portion, which is used to connect the forming section and the upper mold 2. The diameter of the rod body portion is smaller than the diameter of the forming section.

[0036] A rotating sleeve 203 is fitted onto the rod body portion of the rod body 202, such as... Figures 3-5 As shown, the upper end face of the forming section of the rod 202 is connected to the lower end face of the rotating sleeve 203, and the outer diameter of the lower end of the rotating sleeve 203 is the same as the outer diameter of the forming section. A plurality of sliding grooves 205 are evenly arranged around the center circumference of the rod 202 at the upper end face of the forming section. The sliding grooves 205 are vertically upward opening grooves. The lower end of the rotating sleeve 203 is provided with sliding grooves that correspond to the number of sliding grooves 205 on the forming section and have the same groove shape. The length of the sliding grooves on the rotating sleeve 203 is greater than that of the sliding grooves on the forming section.

[0037] The forming section on the rod 202 and the rotating sleeve 203 are relatively fixed or rotated by a number of inserts 204. Specifically, the inserts 204 are vertically slidably engaged in the groove 205. Initially, the lower end face of the insert 204 abuts against the bottom of the groove 205 on the forming section, while the upper end face has a certain distance from the bottom of the groove 205 on the rotating sleeve 203. At this time, the mating plane between the upper end face of the forming section and the lower end face of the rotating sleeve 203 is located in the middle of the insert 204, thereby fixing the rod 202 and the rotating sleeve 203 relatively by the inserts 205. When the insert 204 slides upward so that its upper end face abuts against the bottom of the groove 205 of the rotating sleeve 203, the lower end face of the insert 204 is located above the upper end face of the forming section. At this time, when the rotating sleeve 203 rotates, it can drive the insert 204 to rotate synchronously relative to the rod 202.

[0038] The outer wall of the insert 204 is an arc-shaped wall, and the diameter of its arc is the same as the outer diameter of the forming section of the rod 202. When the forming rod 201 is formed with the forming cavity 102 in the lower mold 101, the rod 202 and the rotating sleeve 203 are in a fixed state. At this time, the forming section at the lower end of the rod 202 is seamlessly connected to the sleeve wall at the lower end of the rotating sleeve 203, and the outer wall at the lower end of the insert 204 fits against both the outer walls of the rod 202 and the rotating sleeve 203, thus forming an integral forming part, i.e. Figure 2 As shown in the diagram; the upper opening of the formed stainless steel barrel is located between the mating plane of the upper end face of the forming section and the lower end face of the rotating sleeve 203 and the upper end face of the insert 204.

[0039] To enable the insert 204 to move upward after the stainless steel barrel body is formed and to drive the insert 204 to slide away from the center of the rod 202 to polish the top of the barrel body, a drive ring 3 is provided on the upper mold 2 to drive the insert 204 to slide vertically. The lower end face of the upper mold 2 is symmetrically provided with lifting push rods 5 connected to the drive ring 3. The push rod end of the lifting push rod 5 is connected to the drive ring 3. The lifting push rod 5 can be a pneumatic push rod or a hydraulic push rod, which can be adapted according to the actual working conditions and power source.

[0040] The two sides of the insert 204 are parallel and fitted to the sides of the groove 205, and the insert 204 can achieve a seamless connection after being embedded in the groove 205, that is, the gap is negligible relative to the requirements of the metal forming mold; an extension rod 206 is fixedly provided on the upper end of the insert 204 away from the center of the rod body 202. One end of the extension rod 206 is fixed to the outer wall of the insert 204, and the other end is provided with a snap-fit ​​block 207 connected to the drive ring 3. Specifically, the drive ring 3 is provided with a drive groove 301, and the snap-fit ​​block 207 is snap-fitted into the drive groove 301. Figure 3 and Figure 5 As shown.

[0041] In this embodiment, taking the setting of 4 sets of inlays 204 as an example, a configuration is thus set as follows: Figure 5 The state of the insert 204 engaging with the drive groove 301 is shown in the figure. The drive groove 301 includes a first track groove 304 and a second track groove 305 for connecting adjacent first track grooves 304. The distance between the second track groove 305 and the center of the rod 202 is greater than the distance between the first track groove 304 and the center of the rod 202. The first track groove 304 and the second track groove 305 are transitioned by an arc. The drive groove 301 is a T-shaped groove. The snap-fit ​​block 207 and the extension rod 206 form a T-shaped snap-fit ​​mechanism. The outer surface of the snap-fit ​​block 207 can be set as a spherical or arc-shaped transition surface. The drive groove 301 is in communication with the inner wall of the drive ring 3.

[0042] When the insert 204 is seamlessly embedded in the groove 205 on the rotating sleeve 203 and the rod 202, the snap-fit ​​block 207 of the insert 204 is located in the first track groove 304. The number of the first track grooves 304 corresponds to the number of inserts 204. The drive ring 3 can be vertically raised and lowered relative to the rotating sleeve 203, but cannot rotate relative to it. When the rotating sleeve 203 rotates, it drives the snap-fit ​​block 207 of the insert 204 to rotate, causing the snap-fit ​​block 207 to slide along the first track groove 304 to the second track groove 305, thereby causing the insert 204 to move away from the center of the rod 202.

[0043] The lower end of the inlay 204 is provided with a polishing groove 302, which is an arc-shaped groove. The diameter of the arc at the center of the groove is the same as the diameter of the upper opening of the part after it is formed. After the drive ring 3 is lifted upward by the lifting push rod 5, the inlay 204 slides upward. At this time, the rotating sleeve 203 is separated from the rod 202 and is in a relative rotation state. Then the rotating sleeve 203 rotates to drive the inlay 204 to move along the drive groove 302. When the inlay 204 is on the side away from the center of the rod 202, the upper opening of the part is polished through the polishing groove 302 at the lower end of the inlay 204.

[0044] The upper mold 2 is equipped with a motor 4, and the rotating sleeve 203 is fixedly equipped with a synchronous pulley 401 that is connected to the motor 4 for transmission. Preferably, the rotating sleeve 203 and the synchronous pulley 401 can be fixed by spline or flat key connection. The motor 4 is equipped with a drive pulley, and the drive pulley and the synchronous pulley 401 are connected by a transmission belt. Preferably, both the drive pulley and the synchronous pulley 401 are toothed synchronous pulleys, and the transmission belt is a synchronous belt, thereby realizing efficient power transmission. The motor 4 is a stepper motor or a servo motor and is connected to a PLC controller to realize high-precision control of the rotation angle of the synchronous pulley 401.

[0045] The upper surface of the drive ring 3 is provided with a plurality of contact rods 303 corresponding to the number of inserts 204. The contact rods 303 are located directly above the position of the first track groove 304. The lower surface of the synchronous pulley 401 is provided with a top block 402 corresponding to the number of contact rods 303. A groove is provided between adjacent top blocks 402. The groove is located directly above the contact rods 303 in the initial state. A transition slope 403 is provided between the two ends of the top block 402 and the groove of the synchronous pulley 401. The top block 402 and the contact rods 303 are both made of wear-resistant alloy. The drive ring 3 is provided with a guide sleeve 404 that cooperates with the contact rods 303. A buffer spring 405 is provided between the contact rods 303 and the drive ring 3.

[0046] The lifting push rod 5 has a sliding rod 501 that cooperates with the drive ring 3 on the push rod end. One end of the sliding rod 501 has a first limiting plate 502, and the other end has a second limiting plate 503 after passing through the mounting plates on both sides of the drive ring 3. A drive spring 504 is provided between the second limiting plate 503 and the drive ring 3.

[0047] When the rotating sleeve 203 rotates, the synchronous wheel 401 rotates synchronously, and the top block 402 on its lower end face pushes the drive ring 3 downward when it is close to the contact rod 303, so that the grinding groove 302 contacts the upper opening of the barrel for grinding.

[0048] The production process for stainless steel barrels using an open-type, large-stroke press with a deep-drawing product trimming structure, as described above, is as follows:

[0049] S1: Place the stainless steel blank plate on the lower die 101. The forming cavity 102 of the lower die 101 is equipped with a lifting rod. This is a standard setting for stretching dies and will not be described in detail here. Then start the press and make the upper die 2 slide down through the stamping slide on the press body 1.

[0050] S2: In the stamping state, the rotating sleeve 203 is integrally set with the rod body 202 through the insert 204 and is in a relatively fixed state. After the forming rod 201 slides down, it cooperates with the forming cavity 102 to form the stainless steel bucket. After forming, the upper opening of the stainless steel bucket is located between the joint surface of the rod body 202 and the rotating sleeve 203 and the upper end surface of the insert 204.

[0051] S3: After stamping is completed, the upper die 2 slides upward, and the lifting rod in the lower die 101 slides upward in sync with the bottom surface of the stainless steel barrel.

[0052] S4: Simultaneously with the action of process S3, the lifting push rod 5 is activated, which slides the drive ring 3 upward and drives the insert 204 upward, thereby making the rotating sleeve 203 and the rod 202 in a state of relative rotation. At this time, the lower end face of the insert 204 is above the upper opening of the stainless steel barrel, and the distance between them is 1-5mm.

[0053] S5: Start motor 4 to make synchronous wheel 401 rotate, which drives rotating sleeve 203 to rotate synchronously. When rotating sleeve 203 rotates, insert 204 slides along drive groove 301 in drive ring 3 through snap block 207 on extension rod 206, so that insert 204 is away from the center of rod body 202 when it cooperates with second track groove 305. At this time, the grinding groove 302 at the lower end of insert 204 is directly above the upper opening of stainless steel barrel.

[0054] S6: While the insert 204 is engaged with the second track groove 305, the contact rod 303 and the top block 402 are in a top contact state, so that the drive ring 3 is in a downward pressure state through the top block 402, and has a certain elastic buffer pressure under the action of the drive spring 504 and the buffer spring 405, making the grinding more stable.

[0055] S7: After the drive ring 3 is pressed down, the grinding groove 302 makes contact with the top opening of the stainless steel barrel through the pressing of the insert 204, thereby achieving grinding of the inner and outer sides of the top opening of the stainless steel barrel.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention 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 the present invention.

Claims

1. An open-side long-stroke press with a structure for trimming a deep-drawn product, comprising a press body (1) and an upper die (2) and a lower die (101) provided on the press body (1), characterized in that: The upper die (2) is provided with a forming rod (201), and the lower die (101) is provided with a forming cavity (102) matched with the forming rod (201); The forming rod (201) comprises a rod body (202) and a rotating sleeve (203) matched with the rod body (202); The rod body (202) and the rotating sleeve (203) are relatively fixed or rotated through a plurality of inlaid parts (204); The rod body (202) and the rotating sleeve (203) are provided with sliding grooves (205) matched with the inlaid parts (204); The upper die (2) is provided with a driving ring (3) for driving the inlaid parts (204) to vertically slide; The driving ring (3) is provided with a driving groove (301) for driving the inlaid parts (204) to displace away from the center of the rod body (202), and the lower end of the inlaid part (204) is provided with a grinding groove (302); The rotating sleeve (203) is separated from the rod body (202) and is driven to move along the driving groove (301) after relative rotation, and the inlaid part (204) grinds the upper opening of the part when it is away from the center of the rod body (202).

2. An open-side large-stroke press having a deep-drawn product trimming structure according to claim 1, characterized in that: The upper die (2) is provided with a motor (4), and the rotating sleeve (203) is provided with a synchronous wheel (401) in transmission connection with the motor (4).

3. An open-side high-stroke press with a structure for trimming a deep-drawn product according to claim 1, characterized in that: The inlaid part (204) is provided with an extension rod (206), one end of the extension rod (206) is connected with the inlaid part (204), and the other end is provided with a clamping block (207) in sliding connection with the driving groove (301).

4. An open-side press with a deep-drawing product trimming structure according to any one of claims 1-3, characterized in that: The upper die (2) is provided with a lifting push rod (5) connected with the driving ring (3).

5. An open-side high-stroke press with a structure for trimming a deep-drawn product according to claim 2, characterized in that: The driving ring (3) is provided with a plurality of contact rods (303) corresponding in number to the inlaid parts (204), and the synchronous wheel (401) is provided with a top block (402) matched with the contact rod (303); The driving groove (301) comprises a first track groove (304) corresponding in position to the contact rod (303) and a second track groove (305) for connecting adjacent first track grooves (304).

6. An open-side high-stroke press with a structure for trimming a deep-drawn product according to claim 5, characterized in that: The top block (402) is provided with a transition inclined surface (403) between the two ends and the synchronous wheel (401).

7. An open-side high-stroke press with a structure for trimming a deep-drawn product according to claim 4, characterized in that: The lifting push rod (5) is provided with a sliding rod (501) matched with the driving ring (3), one end of the sliding rod (501) is provided with a first limiting plate (502), the other end is provided with a second limiting plate (503) after penetrating the driving ring (3), and the second limiting plate (503) and the driving ring (3) are provided with a driving spring (504).

8. An open-side high-stroke press with a structure for trimming a deep-drawn product according to claim 5, characterized in that: The top block (402) and the contact rod (303) are made of wear-resistant alloy.

9. An open-side high-stroke press with a structure for trimming a deep-drawn product according to claim 1, characterized in that: The grinding groove (302) is an arc-shaped groove, and the diameter of the center circle of the arc-shaped groove is the same as the diameter of the upper opening of the part after forming.

10. An open-side high-stroke press with a structure for trimming a deep-drawn product according to claim 5, characterized in that: The driving ring (3) is provided with a guide sleeve (404) matched with the contact rod (303), and the contact rod (303) and the driving ring (3) are provided with a buffer spring (405).

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