In-mold multi-hole side punch mechanism

Abstract

The present invention discloses an in-mold multi-hole side punch mechanism, which specifically relates to the technical field of in-mold multi-hole side punch, including a movable mold and a fixed mold, and also including a side punch assembly, a first positioning assembly and a second positioning assembly. The side punch assembly includes a core arranged in the movable mold and a cavity arranged in the fixed mold, and a workpiece is placed in the cavity; a plurality of avoidance grooves are provided in the core, and a side cutting tool is connected to each avoidance groove through a rotating shaft, and an extrusion member for rotating the side cutting tool around the rotating shaft is provided in the core; the first positioning assembly can preliminarily position the workpiece in the core when the movable mold and the fixed mold are close; the second positioning assembly can drive a plurality of side cutting tools to further limit the workpiece through the extrusion member. The present invention simultaneously extrude a plurality of side cutting tools by moving the extrusion member downward, so that the plurality of side cutting tools rotate in the corresponding avoidance grooves, and the inner side wall of the workpiece is punched at the same time by the cooperation between the side cutting concave mold and the side cutting tool.

Description

Technical Field

[0001] The present invention relates to the technical field of in-mold multi-hole side punching, and more specifically, to an in-mold multi-hole side punching mechanism. Background Art

[0002] In mold manufacturing, "side punching" usually refers to a stamping process in which a punch is inserted into a mold from the side to punch the workpiece. This process can be used to manufacture parts of various shapes.

[0003] When punching holes in metal components from the inside out by cold stamping, if the bottom of the workpiece has been punched and a pre-punched hole is prepared, the workpieces at multiple stations can be translated by mechanical grippers to achieve continuous operation.

[0004] However, in the prior art, due to the particularity of the workpiece to be side-punched, installation errors will occur during the transportation process. When the workpiece is side-punched, the side punched hole and the bottom hole will be misaligned. In addition, the workpiece needs to be forcibly pulled and cut during the punching process. If the workpiece is not further limited, the concave part of the outer wall of the workpiece will be deformed after side punching, causing the workpiece to deform as a whole.

[0005] Therefore, the present invention proposes an in-mold multi-hole side punching mechanism to solve the above problems. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an in-mold multi-hole side punching mechanism to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an in-mold multi-hole side punch mechanism, comprising a movable mold and a fixed mold, and also comprising a side punch assembly, a first positioning assembly and a second positioning assembly, wherein the side punch assembly comprises a core arranged in the movable mold and a cavity arranged in the fixed mold, wherein a workpiece is placed in the cavity; a plurality of avoidance grooves are provided in the core, each of which is connected to a side cutting tool by a rotating shaft, and an extrusion piece for rotating the side cutting tool around the rotating shaft is provided in the core; a placement groove is provided in the cavity, and each of the placement grooves is provided with a plurality of side cutting tools connected to the side cutting tool by a rotating shaft. A side-cutting die is provided to match the side-cutting die, and a plurality of first placement holes corresponding to the side-cutting die are provided circumferentially of the cavity, and a plurality of evenly distributed second placement holes are provided at the bottom of the cavity, and the first placement holes are connected with the second placement holes, and each of the side-cutting dies is provided with an avoidance hole coaxially arranged with the second placement hole, and a guide hole is provided between two adjacent placement grooves on the cavity; the first positioning component can perform preliminary positioning of the workpiece in the core when the movable mold and the fixed mold are close to each other; the second positioning component can drive a plurality of side-cutting tools to further limit the workpiece through the extrusion piece.

[0008] Preferably, the first positioning assembly includes a plurality of first air collecting cylinders arranged in the fixed mold, each of the first air collecting cylinders is slidably connected to a first piston, each of the first pistons is fixedly connected to a first piston rod at one end close to the movable mold, a first elastic member is arranged in each of the first air collecting cylinders, one end of each of the first elastic members is connected to an end of the first piston away from the first piston rod, the other end of each of the first elastic members is connected to an inner bottom wall of the corresponding first air collecting cylinder, and a first air outlet is provided on a side wall at one end of each of the first air collecting cylinders away from the movable mold.

[0009] Preferably, a plurality of first telescopic cylinders corresponding to the side-cutting dies are arranged in the fixed mold, each of the first telescopic cylinders is slidably connected with a second piston, each of the second pistons is fixedly connected with a second piston rod at one end close to the cavity, a second elastic member is sleeved on the outer wall of the second piston rod in the first telescopic cylinder, one end of the second elastic member is connected to one end of the second piston close to the second piston rod, and the other end of the second elastic member is connected to the inner wall of one end of the first telescopic cylinder close to the cavity.

[0010] Preferably, a first air inlet hole is formed on the side wall of each first telescopic cylinder away from the cavity, each first air inlet hole is connected to the first air outlet hole through a three-way pipe, and each first air inlet hole is connected to each other through the three-way pipe and the pipeline.

[0011] Preferably, each of the second piston rods has an end close to the cavity fixedly connected to an extrusion block, and each of the extrusion blocks has an end away from the second piston rod fixedly connected to a pressing head, and each of the pressing heads is adapted to the avoidance hole of the corresponding side-cut die.

[0012] Preferably, the first positioning assembly includes a second air collecting cylinder arranged in the first placement hole and a second telescopic cylinder arranged in the second placement hole, each of the second air collecting cylinders is slidably connected with a third piston, and each of the third pistons is fixedly connected with a third piston rod at one end close to the corresponding extrusion block, and the third piston rod extends out of the avoidance hole opened by the side cutting die and is movably connected with the pressing head arranged on the extrusion block, and a third elastic member is arranged in each of the second air collecting cylinders, one end of the third elastic member is connected to an end of the third piston away from the third piston rod, and the other end of the third elastic member is connected to the inner wall of an end of the second air collecting cylinder away from the extrusion block, and a second air outlet is provided on the side wall of an end of the second air collecting cylinder away from the extrusion block.

[0013] Preferably, each second telescopic cylinder is slidably connected with a fourth piston, and each fourth piston is fixedly connected to a fourth piston rod at one end away from the second air collecting cylinder, and a fourth elastic member is sleeved on the outer wall of the fourth piston rod in each second telescopic cylinder, and one end of each fourth elastic member is connected to an end of the fourth piston close to the fourth piston rod, and the other end of each fourth elastic member is connected to the inner wall of the end of the second telescopic cylinder away from the second air collecting cylinder, and a second air inlet is provided at one end of each second telescopic cylinder close to the second air collecting cylinder, and a protrusion is provided at one end of each second telescopic cylinder close to the second air collecting cylinder, and each second telescopic cylinder is sealed and inserted into the second air outlet of the corresponding second air collecting cylinder through the protrusion, so that the second air inlet is connected to the second air outlet.

[0014] Preferably, the second positioning assembly includes a third air collecting cylinder arranged in the fixed mold, a fifth piston is slidably connected in the third air collecting cylinder, an end of the fifth piston close to the cavity is fixedly connected to a fifth piston rod, one end of the fifth piston rod extending out of the third air collecting cylinder is movably connected to the extrusion piece, a fifth elastic member is arranged in the third air collecting cylinder, one end of the fifth elastic member is connected to an end of the fifth piston away from the fifth piston rod, the other end of the fifth elastic member is connected to the inner wall of an end of the third air collecting cylinder away from the cavity, and a third air outlet is provided on the outer wall of an end of the third air collecting cylinder away from the cavity.

[0015] Preferably, a telescopic part is sleeved on one end of the third air collecting cylinder close to the mold cavity, and an end of the telescopic part away from the third air collecting cylinder is fixedly connected to an end of the mold cavity away from the core, a plurality of air collecting holes are opened in the telescopic part, and the ends of all the air collecting holes away from the mold cavity are connected to each other, a sixth piston is slidably connected in each of the air collecting holes, and a sixth piston rod is fixedly connected to one end of each of the sixth pistons close to the mold cavity, and one end of each of the sixth piston rods extending out of the telescopic part is slidably connected to the inner wall of the guide hole opened in the corresponding mold cavity, and a sixth elastic part is sleeved on the outer wall of the sixth piston rod in each of the air collecting holes, one end of the sixth elastic part is connected to one end of the sixth piston close to the sixth piston rod, and the other end of the sixth elastic part is connected to the inner wall of one end of the air collecting hole close to the mold cavity, and a third air inlet hole connected to the air collecting hole is opened at the bottom of the end of the telescopic part away from the mold cavity, and the third air inlet hole is connected to the third air outlet hole through a pipeline.

[0016] Preferably, the movable mold includes a movable mold fixing plate, a movable mold pressure plate and a core fixing plate, the core is fixedly connected in the core fixing plate, the fixed mold includes a fixed mold fixing plate, a fixed mold pressure plate and a cavity fixing plate, and the cavity is fixedly connected in the cavity fixing plate.

[0017] Technical effects and advantages of the present invention:

[0018] 1. The present invention simultaneously extrude multiple side cutting tools by moving the extrusion member downward, so that the multiple side cutting tools rotate in the corresponding avoidance grooves, and the side cutting die and the side cutting tools cooperate with each other to simultaneously perform side cutting and punching on the inner side wall of the workpiece.

[0019] 2. The present invention uses multiple extrusion blocks to limit the corresponding side cutting dies, and at the same time, multiple extrusion blocks squeeze the corresponding third piston rods, so that the gas in the second gas collecting cylinder is compressed, and the compressed gas enters the second air inlet through the second air outlet, so that the fourth piston rods in the multiple second telescopic cylinders are extended synchronously, and the bottom hole of the workpiece placed in the cavity is positioned and corrected, so that the original bottom hole diameter of the workpiece placed in the cavity is aligned with the side cutting tool, to prevent the side punching hole and the original bottom hole from being misaligned when the workpiece is side punched, thereby affecting the accuracy of the workpiece.

[0020] 3. The present invention extrude the fifth piston rod by moving the extrusion piece downward, so that the gas located in the third gas collecting cylinder is compressed, and the compressed gas enters the third gas inlet hole through the third gas outlet hole and the pipeline, and the compressed gas located in the gas collecting hole simultaneously extrude multiple sixth pistons, and the multiple sixth piston rods synchronously move upward and pass through the guide holes opened in the cavity to contact and limit the concave holes of the workpiece. As the extrusion piece moves further downward, the gas located in the third gas collecting cylinder is further compressed, so that the multiple sixth piston rods are further extended and completely fit with the concave holes of the workpiece, so that the extrusion piece squeezes multiple side cutting tools to side punch the workpiece when pressed downward, and at the same time, the workpiece is further limited by multiple sixth piston rods to prevent the workpiece concave holes and the workpiece shape from deforming when the workpiece is side punched. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the movable mold and the fixed mold of the present invention.

[0022] Figure 2 It is a schematic diagram of the splitting of the movable mold and the fixed mold of the present invention.

[0023] Figure 3 It is a schematic cross-sectional view of the overall structure of the present invention at the first telescopic cylinder.

[0024] Figure 4 It is a schematic cross-sectional view of the overall structure of the present invention at the sixth piston rod.

[0025] Figure 5 It is a schematic diagram of the core structure of the present invention.

[0026] Figure 6 It is a schematic diagram of the cavity structure of the present invention.

[0027] Figure 7 This is a schematic diagram of the structure of the extruded part of the present invention.

[0028] Figure 8 It is a schematic diagram of the side cutting tool of the present invention cutting in the cavity.

[0029] Fig. 9 It is a schematic cross-sectional view of the first gas collecting cylinder of the present invention at the first gas outlet.

[0030] Fig.10 It is a schematic cross-sectional view of the first telescopic cylinder of the present invention at the first air inlet.

[0031] Fig.11 It is a schematic cross-sectional view of the second gas collecting cylinder at the second gas outlet of the present invention.

[0032] Fig.12 It is a schematic cross-sectional view of the second telescopic cylinder at the second air inlet of the present invention.

[0033] Fig.13 It is a schematic cross-sectional view of the third gas collecting cylinder of the present invention at the third gas outlet.

[0034] Fig.14 It is a schematic cross-sectional view of the telescopic member of the present invention at the third air inlet.

[0035] The reference numerals are: 1, movable mold; 101, movable mold fixing plate; 102, movable mold pressing plate; 103, core fixing plate;

[0036] 2. Fixed mold; 201. Fixed mold fixing plate; 202. Fixed mold pressure plate; 203. Cavity fixing plate;

[0037] 3. side punch assembly; 31. core; 310. avoidance groove; 311. side cutting tool; 312. extrusion piece; 32. cavity; 321. side cutting die; 322. first placement hole; 323. second placement hole;

[0038] 4. First positioning assembly; 41. First air collecting cylinder; 411. First piston; 412. First piston rod; 413. First elastic member; 414. First air outlet; 42. First telescopic cylinder; 421. Second piston; 422. Second piston rod; 423. Second elastic member; 424. First air inlet; 425. Extrusion block; 43. Second air collecting cylinder; 431. Third piston; 432. Third piston rod; 433. Third elastic member; 434. Second air outlet; 44. Second telescopic cylinder; 441. Fourth piston; 442. Fourth piston rod; 443. Fourth elastic member; 444. Second air inlet;

[0039] 5. Second positioning assembly; 51. Third air collecting cylinder; 511. Fifth piston; 512. Fifth piston rod; 513. Fifth elastic member; 514. Third air outlet; 52. Telescopic member; 521. Air collecting cavity; 522. Sixth piston; 523. Sixth piston rod; 524. Sixth elastic member; 525. Third air inlet;

[0040] 6. Workpiece. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Embodiment 1

[0043] In actual production, it is found that multiple steps are required when performing lateral punching in a mold on cylindrical parts, resulting in uneven punching and more steps when performing lateral punching on the product. This embodiment is specially invented to solve the above problems.

[0044] See also Figure 1 The in-mold multi-hole side punch mechanism of an embodiment of the present invention comprises a movable mold 1 and a fixed mold 2, and also comprises a side punch assembly 3, a first positioning assembly 4 and a second positioning assembly 5, Figure 2 The side punch assembly 3 includes a core 31 disposed in the movable mold 1 and a cavity 32 disposed in the fixed mold 2, and a workpiece 6 is placed in the cavity 32; Figure 5 and Figure 8 A plurality of avoidance grooves 310 are provided in the core 31, each of which is connected to a side cutting tool 311 by rotation of a rotating shaft, and an extrusion piece 312 for rotating the side cutting tool 311 around the rotating shaft is provided in the core 31; the first positioning assembly 4 can perform preliminary positioning of the workpiece 6 in the core 31 when the movable mold 1 and the fixed mold 2 are close to each other; the second positioning assembly 5 can drive the plurality of side cutting tools 311 to further limit the workpiece 6 through the extrusion piece 312.

[0045] See also Figure 4 and Figure 6 The mold cavity 32 is provided with a placement groove, each of which is provided with a plurality of side cutting dies 321 matched with the side cutting tool 311, and the mold cavity 32 is provided with a plurality of first placement holes 322 corresponding to the side cutting dies 321 in the circumferential direction, and the mold cavity 32 is provided with a plurality of evenly distributed second placement holes 323 at the bottom of the mold cavity 32, and the first placement holes 322 are connected with the second placement holes 323, and each side cutting die 321 is provided with an avoidance hole coaxially arranged with the second placement hole 323, and a guide hole is provided between two adjacent placement grooves on the mold cavity 32, and the mold cavity 32 is provided with a plurality of first placement holes 322 corresponding to the side cutting dies 321. Figure 2The movable mold 1 includes a movable mold fixing plate 101, a movable mold pressure plate 102 and a core fixing plate 103, and the core 31 is fixedly connected in the core fixing plate 103. The fixed mold 2 includes a fixed mold fixing plate 201, a fixed mold pressure plate 202 and a cavity fixing plate 203, and the cavity 32 is fixedly connected in the cavity fixing plate 203.

[0046] When in use, first fix the movable mold 1 and the fixed mold 2 on the press. It should be noted that the press is a vertical press, wherein the fixed mold 2 is fixed to the working platform of the press through the fixed mold fixing plate 201, and the movable mold 1 is fixed in the pressing mechanism of the press through the movable mold fixing plate 101, wherein the pressing piece carried by the press is fixedly connected with the extrusion piece 312, and the workpiece 6 to be side-punched is placed in the cavity 32, and the press is started so that the pressing mechanism drives the movable mold 1 to move downward as a whole, so that the core 31 moves downward into the cavity 32, and while the core 31 moves downward, it drives multiple side cutting tools 311 and the extrusion piece 312 to move toward the inner cavity of the cavity 32, and as the core 31 continues to move downward, the core 31 extrude and position the workpiece 6 in the cavity 32, so as to prevent the core 31 from being squeezed and positioned. Figure 8 As an example, the pressing member presses down to drive the extrusion member 312 to move downward. When the extrusion member 312 moves downward and the wedge-shaped surface contacts the multiple side cutting tools 311, as the extrusion member 312 moves downward continuously, the wedge-shaped surface at the bottom of the extrusion member 312 continuously squeezes the multiple side cutting tools 311 to rotate around the rotation axis in the avoidance groove 310. While the multiple side cutting tools 311 rotate, they continuously approach the corresponding side cutting concave mold 321. At the same time, the other ends of the multiple side cutting tools 311 approach the wedge-shaped surface at the top of the extrusion member 312. As the extrusion piece 312 is continuously pressed downward, the side cutting tool 311 enters the side cutting die 321 and punches the side wall of the workpiece 6. At the same time, the waste is discharged through the blanking hole. At this time, the end of the side cutting tool 311 away from the cavity 32 is completely in contact with the upper wedge surface of the extrusion piece 312. After the side punching of the workpiece 6 is in place by the side cutting tool 311 and the side cutting die 321, the pressing piece first drives the extrusion piece 312 to move upward. At the same time as the extrusion piece 312 moves upward, multiple side cutting tools 311 rotate and disengage from the side cutting die 321.

[0047] To summarize, the extrusion piece 312 is moved downward to extrude multiple side cutting tools 311 at the same time, so that the multiple side cutting tools 311 rotate in the corresponding avoidance groove 310, and the side cutting die 321 cooperates with the side cutting tools 311 to simultaneously perform side cutting and punching on the inner wall of the workpiece 6.

[0048] Embodiment 2

[0049] During use, it was found that although the extrusion piece 312 was moved downward to extrude the multiple side cutting tools 311, so that the side cutting tools 311 rotated in the avoidance groove 310, and the side punching of the workpiece 6 was achieved through the side cutting die 321, there was still a problem that, since the bottom of the workpiece 6 had been punched in the previous step, and the workpiece 6 was subsequently placed in the cavity 32, due to the limited placement accuracy of the workpiece 6, when the workpiece 6 was side punched, there was a problem such as misalignment with the original bottom hole. For this reason, this embodiment is specially invented on the basis of the above-mentioned embodiment.

[0050] See also Figure 2 and Fig. 9 The first positioning assembly 4 includes a plurality of first air collecting cylinders 41 arranged in the fixed mold 2, each of which is slidably connected to a first piston 411, and each of which is fixedly connected to a first piston rod 412 at one end close to the movable mold 1, and a first elastic member 413 is arranged in each of the first air collecting cylinders 41, wherein the first elastic member 413 is a spring, and one end of each of the first elastic members 413 is connected to an end of the first piston 411 away from the first piston rod 412, and the other end of each of the first elastic members 413 is connected to the inner bottom wall of the corresponding first air collecting cylinder 41, and a first air outlet 414 is provided on the side wall at one end of each of the first air collecting cylinders 41 away from the movable mold 1.

[0051] See also Figure 3 and Fig.10 The fixed mold 2 is provided with a plurality of first telescopic cylinders 42 corresponding to the side cutting concave mold 321, each of the first telescopic cylinders 42 is slidably connected with a second piston 421, and each second piston 421 is fixedly connected with a second piston rod 422 at one end close to the cavity 32, and a second elastic member 423 is sleeved on the outer wall of the second piston rod 422 in the first telescopic cylinder 42, wherein the second elastic member 423 is a spring, one end of the second elastic member 423 is connected to one end of the second piston 421 close to the second piston rod 422, and the other end of the second elastic member 423 is connected to the first telescopic cylinder 42 close to the cavity 32. The inner wall of one end near the cavity 32 is connected, and a first air inlet hole 424 is opened on the side wall of the end of each first telescopic cylinder 42 away from the cavity 32, and each first air inlet hole 424 is connected to the first air outlet hole 414 through a three-way pipe, and each first air inlet hole 424 is interconnected through the three-way pipe and the pipeline, and each second piston rod 422 is fixedly connected to an extrusion block 425 at one end close to the cavity 32, and each extrusion block 425 is fixedly connected to a pressing head at one end away from the second piston rod 422, and each pressing head is adapted to the avoidance hole of the corresponding side-cut die 321.

[0052] See also Figure 6 , Figure 7 and Figure 8The first positioning assembly 4 includes a second gas collecting cylinder 43 disposed in the first placement hole 322 and a second telescopic cylinder 44 disposed in the second placement hole 323, combined with Fig.11 , each second air collecting cylinder 43 is slidably connected with a third piston 431, and each third piston 431 is fixedly connected with a third piston rod 432 at one end close to the corresponding extrusion block 425, and the third piston rod 432 extends out of the avoidance hole opened by the side cutting die 321 and is movably connected with the pressing head set in the extrusion block 425, and each second air collecting cylinder 43 is provided with a third elastic member 433, wherein the third elastic member 433 is a spring, one end of the third elastic member 433 is connected with the end of the third piston 431 away from the third piston rod 432, and the other end of the third elastic member 433 is connected with the inner wall of one end of the second air collecting cylinder 43 away from the extrusion block 425, and a second air outlet 434 is provided on the side wall of one end of the second air collecting cylinder 43 away from the extrusion block 425, Fig.12 , each second telescopic cylinder 44 is slidably connected with a fourth piston 441, and one end of each fourth piston 441 away from the second gas collecting cylinder 43 is fixedly connected with a fourth piston rod 442. It should be noted that the fourth piston rod 442 is composed of a cylinder and a frustum, and the outer wall of the fourth piston rod 442 in each second telescopic cylinder 44 is sleeved with a fourth elastic member 443, wherein the fourth elastic member 443 is a spring, and one end of each fourth elastic member 443 is connected to the end of the fourth piston 441 close to the fourth piston rod 442 The other end of each fourth elastic member 443 is connected to the inner wall of one end of the second telescopic cylinder 44 away from the second air collecting cylinder 43, and a second air inlet hole 444 is provided at one end of each second telescopic cylinder 44 close to the second air collecting cylinder 43. A protrusion is provided at one end of each second telescopic cylinder 44 close to the second air collecting cylinder 43, and each second telescopic cylinder 44 is sealed and plugged into the second air outlet hole 434 of the corresponding second air collecting cylinder 43 through the protrusion, so that the second air inlet hole 444 is communicated with the second air outlet hole 434.

[0053] When used on the basis of the above embodiment, the movable mold pressing plate 102 moves downward and squeezes the first piston rod 412, and the first piston rod 412 drives the first piston 411 to move in the first gas collecting cylinder 41. The first piston 411 continuously squeezes the first elastic member 413 while moving, and at the same time, the gas at the first air outlet 414 in the first gas collecting cylinder 41 is compressed, and the compressed gas enters the first air inlet 424 through the first air outlet 414, the pipeline and the three-way pipe, and the compressed gas enters the first telescopic cylinder 42 through the first air inlet 424. The compressed gas in the first telescopic cylinder 42 continuously squeezes the second piston 421, and the second piston 421 moves while driving the second piston rod 422 to move. At the same time, the second piston 421 continuously squeezes the second elastic member 423, and the second piston rod 422 moves while driving the extrusion block 425 to approach the corresponding side cutting die 321. At the same time, the extrusion block 425 presses The first head squeezes the third piston rod 432, and the third piston rod 432 moves while driving the third piston 431 to move in the second gas collecting cylinder 43, and the second piston 421 moves while continuously squeezing the third elastic member 433. At the same time, the gas located at the second air outlet 434 in the second gas collecting cylinder 43 is compressed, and the compressed gas enters the second air inlet 444 through the second air outlet 434. The compressed gas located at the second air inlet 444 enters the inner cavity of the second telescopic cylinder 44, and the compressed gas located in the second telescopic cylinder 44 continuously squeezes the fourth piston 441, so that the fourth piston 441 moves upward in the second telescopic cylinder 44. The fourth piston 441 moves while driving the fourth piston rod 442 to move. At the same time, the fourth piston 441 continuously squeezes the fourth elastic member 443. When the fourth elastic member 443 is compressed to the maximum limit position, multiple fourth piston rods 442 perform limit correction on the pre-punching bottom hole position of the workpiece 6.

[0054] In summary, by moving the movable die plate 102 downward and pressing the first piston rod 412 downward, the gas in the first gas collecting cylinder 41 is compressed by the first piston 411, and the compressed gas enters the plurality of first telescopic cylinders 42 through the pipeline at the same time, so that the plurality of second piston rods 422 and the extrusion blocks 425 are fitted and limited to the corresponding side cutting dies 321, so that when the side cutting tool 311 performs a side punch on the workpiece 6 through the side cutting dies 321, the side cutting dies 321 are not easily deformed, thereby ensuring the side punching accuracy; at the same time, the corresponding side cutting dies 321 are squeezed by the plurality of extrusion blocks 425 While the pressure limit is set, multiple extrusion blocks 425 simultaneously squeeze the corresponding third piston rod 432, so that the gas in the second gas collecting cylinder 43 is compressed, and the compressed gas enters the second gas inlet 444 through the second gas outlet 434, so that the fourth piston rods 442 in the multiple second telescopic cylinders 44 are synchronously extended, and the bottom hole of the workpiece 6 placed in the cavity 32 is positioned and corrected, so that the original bottom hole diameter of the workpiece 6 placed in the cavity 32 is aligned with the side cutting tool 311, to prevent the side punching hole and the original bottom hole from being misaligned when the workpiece 6 is side punched, thereby affecting the accuracy of the workpiece 6.

[0055] Embodiment 3

[0056] During further use, it was found that although the bottom hole of the workpiece 6 placed in the cavity 32 is positioned and corrected by synchronously extending multiple fourth piston rods 442, there is still a problem that when the side cutting tool 311 is cutting the workpiece 6, when the side cutting tool 311 moves downward under the action of the extrusion member 312, the side cutting tool 311 begins to contact the inner wall of the workpiece 6 and applies pressure. When the side cutting tool 311 contacts the workpiece 6, the surrounding metal is subjected to pressure. As the extrusion member 312 continues to move downward, the side cutting tool 311 further squeezes the workpiece 6. The side cutting tool 311 conflicts with the workpiece 6, causing stress deformation. Due to problems such as uneven internal stress distribution, the workpiece 6 causes deformation in multiple recesses on the outer surface of the workpiece 6, causing the overall shape of the workpiece 6 to not meet the dimensional standards. For this reason, this embodiment is specially invented on the basis of the above-mentioned embodiment.

[0057] See also Figure 3 and Figure 4 The second positioning assembly 5 includes a third gas collecting cylinder 51 disposed in the fixed mold 2, combined with Fig.13A fifth piston 511 is slidably connected in the third gas collecting cylinder 51, and a fifth piston rod 512 is fixedly connected to one end of the fifth piston 511 close to the cavity 32. One end of the fifth piston rod 512 extending out of the third gas collecting cylinder 51 is movably connected to the extrusion member 312. A fifth elastic member 513 is arranged in the third gas collecting cylinder 51, wherein the fifth elastic member 513 is a spring, one end of the fifth elastic member 513 is connected to one end of the fifth piston 511 away from the fifth piston rod 512, and the other end of the fifth elastic member 513 is connected to the inner wall of one end of the third gas collecting cylinder 51 away from the cavity 32, and a third air outlet 514 is provided on the outer wall of one end of the third gas collecting cylinder 51 away from the cavity 32. Fig.14 A telescopic member 52 is sleeved on one end of the third gas collecting cylinder 51 close to the mold cavity 32, and an end of the telescopic member 52 away from the third gas collecting cylinder 51 is fixedly connected to an end of the mold cavity 32 away from the mold core 31. A plurality of gas collecting holes 521 are provided in the telescopic member 52, and the ends of all the gas collecting holes 521 away from the mold cavity 32 are interconnected, and a sixth piston 522 is slidably connected in each gas collecting hole 521, and a sixth piston rod 523 is fixedly connected to the end of each sixth piston 522 close to the mold cavity 32. It should be noted that the sixth piston rod 523 is composed of a cylinder and a hemisphere, and each sixth piston rod 523 extends out of one end of the telescopic member 52 They are all slidingly connected to the inner wall of the guide hole opened in the corresponding cavity 32, and the outer wall of the sixth piston rod 523 in each air collecting cavity 521 is sleeved with a sixth elastic member 524, wherein the sixth elastic member 524 is a spring, one end of the sixth elastic member 524 is connected to the end of the sixth piston 522 close to the sixth piston rod 523, and the other end of the sixth elastic member 524 is connected to the inner wall of the air collecting cavity 521 close to the cavity 32, and a third air inlet hole 525 connected to the air collecting cavity 521 is opened at the bottom of the end of the telescopic member 52 away from the cavity 32, and the third air inlet hole 525 is connected to the third air outlet hole 514 through a pipeline.

[0058] When used on the basis of the above embodiment, the extrusion member 312 and the movable mold 1 are approached to the fixed mold 2, and the extrusion member 312 squeezes the fifth piston rod 512, and the fifth piston rod 512 drives the fifth piston 511 to move in the third gas collecting cylinder 51, and the fifth piston 511 continuously squeezes the fifth elastic member 513 while moving in the third gas collecting cylinder 51, and at the same time, the gas in the third air outlet 514 in the third gas collecting cylinder 51 is compressed, and the compressed gas enters the third air inlet 525 through the third air outlet 514 and the pipeline, and the compressed gas in the third air inlet 525 enters the multiple air collecting holes 521 opened by the telescopic member 52, and the compressed gas in the air collecting holes 521 is compressed. The compressed gas squeezes multiple sixth pistons 522 at the same time. The movement of the sixth piston 522 drives the sixth piston rod 523 to move. Multiple sixth piston rods 523 pass through the guide holes opened in the cavity 32 and contact and limit the recesses of the workpiece 6. As the extrusion piece 312 moves further downward, the gas in the third gas collecting cylinder 51 is further compressed, so that the multiple sixth piston rods 523 are further extended to completely fit with the recesses of the workpiece 6. When the extrusion piece 312 is pressed downward to cause multiple side cutting tools 311 to side punch the workpiece 6, the workpiece 6 is further limited by the multiple sixth piston rods 523 to prevent the recesses of the workpiece 6 and the shape of the workpiece 6 from being deformed during the side punching.

[0059] To summarize, the fifth piston rod 512 is squeezed by the downward movement of the extrusion piece 312, so that the gas located in the third gas collecting cylinder 51 is compressed, and the compressed gas enters the third gas inlet hole 525 through the third gas outlet hole 514 and the pipeline, and the compressed gas located in the gas collecting cavity 521 squeezes multiple sixth pistons 522 at the same time, and multiple sixth piston rods 523 are synchronously moved up and pass through the guide holes opened in the cavity 32 to contact and limit the concave holes of the workpiece 6. As the extrusion piece 312 moves further downward, the gas located in the third gas collecting cylinder 51 is further compressed, so that the multiple sixth piston rods 523 are further extended to completely fit with the concave holes of the workpiece 6, so that when the extrusion piece 312 is pressed down, it squeezes multiple side cutting tools 311 to side punch the workpiece 6, and at the same time, the workpiece 6 is further limited by multiple sixth piston rods 523 to prevent the concave holes and the shape of the workpiece 6 from being deformed during the side punching.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An in-mold multi-hole side punching mechanism, comprising a movable mold and a fixed mold, characterized in that: Also includes: A side punch assembly, the side punch assembly comprises a core arranged in a movable mold and a cavity arranged in a fixed mold, a workpiece is placed in the cavity, and a plurality of recesses are arranged on the outer surface of the workpiece; A plurality of avoidance grooves are provided in the core, each of which is connected to a side cutting tool by rotation of a rotating shaft, and an extrusion piece for rotating the side cutting tool around the rotating shaft is provided in the core; a placement groove is provided in the cavity, and a plurality of side cutting dies matching the side cutting tool are provided in each placement groove, a plurality of first placement holes corresponding to the side cutting dies are provided in the circumference of the cavity, and a plurality of evenly distributed second placement holes are provided at the bottom of the cavity, the first placement holes are connected to the second placement holes, and each side cutting dies is provided with an avoidance hole coaxially arranged with the second placement hole, and a guide hole is provided between two adjacent placement grooves on the cavity; A first positioning assembly, the first positioning assembly can perform preliminary positioning of the workpiece in the core when the movable mold and the fixed mold are close to each other; The second positioning component includes a third air collecting cylinder arranged in the fixed mold, a telescopic part is sleeved on one end of the third air collecting cylinder close to the cavity, a plurality of air collecting holes are opened in the telescopic part, and the ends of all the air collecting holes away from the cavity are interconnected, a sixth piston is slidably connected in each air collecting hole, a sixth piston is fixedly connected to the end of each sixth piston close to the cavity, and one end of each sixth piston rod extending out of the telescopic part is slidably connected to the inner wall of the guide hole opened in the corresponding cavity, and the plurality of sixth piston rods can fit into the recesses of the workpiece.

2. The in-mold multi-hole side punching mechanism according to claim 1, characterized in that: The first positioning assembly includes a plurality of first air collecting cylinders arranged in the fixed mold, each of which is slidably connected to a first piston, and each of which is fixedly connected to a first piston rod at one end close to the movable mold, and a first elastic member is arranged in each of which, one end of each of which is connected to an end of the first piston away from the first piston rod, and the other end of each of which is connected to an inner bottom wall of the corresponding first air collecting cylinder, and a first air outlet is provided on a side wall at one end of each of which is away from the movable mold.

3. The in-mold multi-hole side punching mechanism according to claim 2, characterized in that: A plurality of first telescopic cylinders corresponding to the side-cutting dies are arranged in the fixed mold, a second piston is slidably connected in each first telescopic cylinder, a second piston is fixedly connected to one end of each second piston close to the cavity, a second elastic member is sleeved on the outer wall of the second piston rod in the first telescopic cylinder, one end of the second elastic member is connected to one end of the second piston close to the second piston rod, and the other end of the second elastic member is connected to the inner wall of one end of the first telescopic cylinder close to the cavity.

4. The in-mold multi-hole side punching mechanism according to claim 3, characterized in that: A first air inlet hole is formed on the side wall of one end of each first telescopic cylinder away from the cavity, each first air inlet hole is connected to the first air outlet hole through a three-way pipe, and each first air inlet hole is connected to each other through the three-way pipe and the pipeline.

5. The in-mold multi-hole side punching mechanism according to claim 4, characterized in that: One end of each second piston rod close to the cavity is fixedly connected to an extrusion block, and one end of each extrusion block away from the second piston rod is fixedly connected to a pressing head, and each pressing head is adapted to the avoidance hole of the corresponding side-cut die.

6. The in-mold multi-hole side punching mechanism according to claim 5, characterized in that: The first positioning assembly includes a second air collecting cylinder arranged in the first placement hole and a second telescopic cylinder arranged in the second placement hole, each second air collecting cylinder is slidably connected with a third piston, and each third piston is fixedly connected with a third piston rod at one end close to the corresponding extrusion block, and the third piston rod extends out of the avoidance hole opened by the side cutting die and is movably connected with the pressing head set by the extrusion block, and a third elastic member is arranged in each second air collecting cylinder, one end of the third elastic member is connected with an end of the third piston away from the third piston rod, and the other end of the third elastic member is connected with the inner wall of one end of the second air collecting cylinder away from the extrusion block, and a second air outlet is opened on the side wall of one end of the second air collecting cylinder away from the extrusion block.

7. The in-mold multi-hole side punching mechanism according to claim 6, characterized in that: A fourth piston is slidably connected in each second telescopic cylinder, and a fourth piston rod is fixedly connected to an end of each fourth piston away from the second air collecting cylinder. A fourth elastic member is sleeved on the outer wall of the fourth piston rod in each second telescopic cylinder, and one end of each fourth elastic member is connected to an end of the fourth piston close to the fourth piston rod, and the other end of each fourth elastic member is connected to the inner wall of an end of the second telescopic cylinder away from the second air collecting cylinder. A second air inlet is provided at one end of each second telescopic cylinder close to the second air collecting cylinder, and a protrusion is provided at one end of each second telescopic cylinder close to the second air collecting cylinder. Each second telescopic cylinder is sealed and inserted into the second air outlet of the corresponding second air collecting cylinder through the protrusion, so that the second air inlet is connected to the second air outlet.

8. The in-mold multi-hole side punching mechanism according to claim 7, characterized in that: A fifth piston is slidably connected in the third air collecting cylinder, and a fifth piston rod is fixedly connected to one end of the fifth piston close to the mold cavity. One end of the fifth piston rod extending out of the third air collecting cylinder is movably connected to the extrusion piece. A fifth elastic member is arranged in the third air collecting cylinder, and one end of the fifth elastic member is connected to one end of the fifth piston away from the fifth piston rod, and the other end of the fifth elastic member is connected to the inner wall of one end of the third air collecting cylinder away from the mold cavity. A third air outlet is provided on the outer wall of one end of the third air collecting cylinder away from the mold cavity.

9. The in-mold multi-hole side punching mechanism according to claim 8, characterized in that: One end of the telescopic part away from the third air collecting cylinder is fixedly connected to the end of the cavity away from the core, the outer wall of each sixth piston rod is sleeved with a sixth elastic part located in the air collecting cavity, one end of the sixth elastic part is connected to the end of the sixth piston close to the sixth piston rod, the other end of the sixth elastic part is connected to the inner wall of the end of the air collecting cavity close to the cavity, and a third air inlet hole connected to the air collecting cavity is provided at the bottom of the end of the telescopic part away from the cavity, and the third air inlet hole is connected to the third air outlet hole through a pipeline.

10. The in-mold multi-hole side punching mechanism according to claim 9, characterized in that: The movable mold includes a movable mold fixing plate, a movable mold pressure plate and a core fixing plate, the core is fixedly connected in the core fixing plate, the fixed mold includes a fixed mold fixing plate, a fixed mold pressure plate and a cavity fixing plate, and the cavity is fixedly connected in the cavity fixing plate.

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