A device for checking interference of ejector rod

Abstract

The present invention discloses a device for checking interference of ejector pins, including a test plate and a test rod; the test plate is provided with a plurality of ejector pin holes, which are matched with the die base through holes of the lower die base; the test rod is a cylindrical structure, and can be movably arranged in each ejector pin hole, and the length of the test rod is greater than the depth of the die base through hole; the test plate is attached to the lower surface of the lower die base, and the test rod is inserted into the die base through hole. The present invention plays a role in simulating the air cushion ejector pin, and before the stamping process, the air cushion ejector pin is plugged and matched with the lower die base, so as to realize visual testing and checking of interference in advance, and the unqualified lower die base can be reprocessed and corrected in time, so that the air cushion ejector pins on the machine are protected and avoid frequent maintenance and replacement, saving economic and labor costs, and also ensuring the production progress.

Description

Technical Field

[0001] The invention relates to the field of stamping dies, and in particular to a device for checking interference of a push rod. Background Art

[0002] The drawing die is a process equipment that, under the action of the press, through the combined action of the die (upper die), the blank holder, and the punch (lower die), the flat blank is deformed to obtain a stable spatial shape. Depending on the equipment used, the drawing die can be divided into a single-action drawing die and a double-action drawing die.

[0003] Among them, the single-action drawing die needs to use the air cushion push rod (also called bed push rod) on the machine table. Figure 1 During the stamping operation, the lower die base is locked on the machine table, the air cushion push rod passes through several die base through holes in the lower die base, and lifts the pressure ring, and then the upper die makes a downward pressing movement in the vertical direction to pull and press the blank into shape.

[0004] Since the lower die base may have dimensional errors during the processing, the air cushion ejector pin cannot pass through the die base through hole of the lower die base, and interference occurs inside the lower die base, causing damage to the air cushion ejector pin. Moreover, the interference occurs inside the lower die base, and the lifting process is difficult to observe. The operator cannot take measures before the interference occurs, resulting in the need for maintenance or replacement of the air cushion ejector pin, resulting in great economic and labor costs.

[0005] Therefore, there is an urgent need for a testing and troubleshooting device that can test and troubleshoot the lower die base for interference before the stamping process; if interference is found, the lower die base can be reprocessed and corrected in time, which can achieve good protection for the bed top rod, improve production safety, and save the bed top rod from frequent maintenance and replacement. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a push rod interference detection device, which can cooperate with the lower die seat of the drawing die and cooperate with the lower die seat in advance before stamping to observe and detect whether interference will occur.

[0007] The present invention is achieved by adopting the following technical solutions:

[0008] A device for checking interference of a push rod comprises: a test plate and a test rod; the test plate is provided with a plurality of push rod holes, the push rod holes are matched with the die base through holes of a lower die base; the test rod is a cylindrical structure, and can be movably arranged in each of the push rod holes, the length of the test rod is greater than the depth of the die base through hole; the test plate is attached to the lower surface of the lower die base, and the test rod is inserted into the die base through hole.

[0009] Furthermore, the test rod is provided with a pin hole, a limit pin is inserted into the pin hole, and the test rod is movably arranged on the test plate through the cooperation of the pin hole and the limit pin.

[0010] Furthermore, the push rod interference detection device also includes a fixed rail; the fixed rail is arranged on the lower surface of the lower mold base, a card slot is arranged on the fixed rail, and a card slot matching the card slot is arranged on the test plate, and the test plate and the fixed rail are engaged and fixed.

[0011] Furthermore, a first positioning key is provided at one end of the fixed rail, and a first key slot is correspondingly provided on the lower die base, and the first positioning key is matched and fixed with the first key slot on the lower die base to position the fixed rail.

[0012] Furthermore, the push rod interference detection device also includes a fixed pressure plate; the fixed pressure plate is arranged at the bottom of the fixed rail and is fixedly connected to the fixed rail by bolts to fix the fixed rail on the lower mold base.

[0013] Furthermore, a plurality of slots are provided on the fixed rail.

[0014] Furthermore, a plurality of bayonet holes are provided on the test board.

[0015] Furthermore, the test plate also includes a second positioning key, which is fixedly connected to the test plate by screws, and a second key slot is correspondingly provided on the lower mold base, and the second positioning key is fixedly matched with the second key slot to position the test plate.

[0016] Furthermore, the test plate also includes a support pad; the support pad is arranged at the bottom of the test plate and is located close to the center of the test plate; the support pad is attached to the lower surface of the lower mold base.

[0017] Furthermore, the test rod is provided with a plurality of pin holes of different heights; and the side of each pin hole is engraved with a corresponding stroke value.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: by installing several test rods on the test plate, inserting the test rods into the die base through holes of the lower die base, and observing the height of each test rod, it can be determined whether interference occurs. If there is interference in a die base through hole, the corresponding test rod will be lifted up. The present invention simulates the air cushion push rod. Before the stamping process, the air cushion push rod is plugged and matched with the lower die base, and visual testing and troubleshooting of interference are realized in advance. The unqualified lower die base can be reprocessed and corrected in time, so that the air cushion push rod on the machine is protected and avoids frequent maintenance and replacement, saving economic and labor costs, and also ensuring production progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the cooperation between the lower die seat and the air cushion ejector pin;

[0020] Figure 2 It is a three-dimensional schematic diagram of the cooperation between the lower die base and the present invention;

[0021] Figure 3 This is a bottom view of the lower die base;

[0022] Figure 4 It is a three-dimensional schematic diagram of the present invention;

[0023] Figure 5 This is an exploded view of the present invention.

[0024] In the figure: 10, air cushion push rod; 20, lower die base; 21, die base through hole; 22, first keyway; 23, second keyway; 30, push rod interference detection device; 31, test plate; 311, push rod hole; 312, support pad; 313, bayonet; 314, second positioning key; 32, test rod; 321, pin hole; 33, limit pin; 34, fixed rail; 341, slot; 342, first positioning key; 35, fixed pressure plate; 36, bolt; 40, pressure ring. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0026] The present invention discloses a device 30 for checking interference of a push rod. Figure 1 , Figure 1As shown, the upper surface of the lower die base 20 faces upward. When the drawing die is stamping, the lower die base 20 is locked on the machine platform. The air cushion push rod 10 on the machine platform passes through several die base through holes 21 in the lower die base 20 and lifts the pressure ring 40. Then the upper die base performs a downward pressing movement in the vertical direction to draw and press the blank into shape. If interference occurs between the lower die base 20 and the air cushion push rod 10, the air cushion push rod 10 on the machine platform will be damaged, resulting in the need for maintenance and replacement.

[0027] The ejector pin interference detection device 30 disclosed in the present invention simulates the air cushion ejector pin 10. Before the formal stamping process, the air cushion ejector pin 10 is matched with the lower die base 20 to test and detect the interference of the lower die base 20 in advance. If the lower die base 20 with interference is found, it will be reprocessed and corrected in time; if no interference is found, the lower die base 20 will be locked on the machine table and then the stamping work will be officially started.

[0028] See also Figure 2 ,and Figure 1 In contrast, Figure 2 The lower surface of the lower die base 20 is shown facing upward. The ejector interference detection device 30 includes a test plate 31 and a test rod 32. Figure 2 , Figure 4 , Figure 5 , the test plate 31 is provided with a plurality of ejector holes 311, the ejector holes 311 are adapted to the die base through hole 21 of the lower die base 20, and the center positions of the ejector holes 311 and the die base through hole 21 correspond to each other and are spaced at equal intervals. The test rod 32 is a cylindrical structure, the diameter of the test rod 32 is consistent with the diameter of the air cushion ejector 10, and at the same time ensures that its diameter is 1mm smaller than the ejector hole 311, and is movably arranged on each of the ejector holes 311, so that the test rod 32 can be lifted up when interference occurs, thereby realizing visualization; the length of the test rod 32 is greater than the depth of the die base through hole 21, so that the test rod 32 can pass through the die base through hole 21; the test plate 31 is attached to the lower surface of the lower die base 20, and the test rod 32 is inserted into the die base through hole 21. By observing and comparing the height of each test rod 32 and whether it is lifted up, it can be determined whether interference occurs in the die base through hole 21.

[0029] As a preferred embodiment, see Figure 5 The test rod 32 is provided with a pin hole 321, which can be semicircular or rectangular with a chamfered C corner. An adaptable stop pin 33 is inserted into the pin hole 321, and the test rod 32 is movably arranged on the test plate 31 through the cooperation of the pin hole 321 and the stop pin 33. That is, the stop pin 33 clamps the test rod 32 on the test plate 31, so that the test rod 32 is fixed in the vertical downward direction and movable in the vertical upward direction, so that when the bottom end of the test rod 32 interferes with the lower die base 20, the test rod 32 can be lifted up and observed.

[0030] As a preferred embodiment, see Figure 2 , Figure 4 , Figure 5 , the ejector interference troubleshooting device 30 also includes a fixed rail 34. The fixed rail 34 is arranged on the lower surface of the lower mold base 20, and a slot 341 is arranged on the fixed rail 34. A matching slot 313 is correspondingly arranged on the test plate 31, and the test plate 31 is fixedly engaged with the fixed rail 34. Specifically, there are two fixed rails 34, which are arranged at both ends of the test plate 31, so that the test plate 31 and the fixed rail 34 form a "U"-shaped structure. According to the design and calculation for the specific working conditions, the distance between the slots 341 of the two fixed rails 34 can be made consistent with the distance between the two slots 313 on the test plate 31. Therefore, through this embodiment, the test plate 31 can be quickly positioned on the fixed rail 34 and inserted into the mold base through hole 21, without the need to repeatedly align and insert the test rod 32 and the mold base through hole 21, which saves working time and improves efficiency.

[0031] As a preferred embodiment, a first positioning key 342 is further provided at one end of the fixed rail 34, and a first keyway 22 is correspondingly provided on the lower die base 20. The first positioning key 342 is used to cooperate with the first keyway 22 on the lower die base 20 to quickly position the installation of the fixed rail 34. Through this embodiment, the fixed rail 34 can be quickly installed on the lower die base 20.

[0032] As a preferred embodiment, the ejector interference troubleshooting device 30 further includes a fixed pressure plate 35. The fixed pressure plate 35 is disposed at the bottom of the fixed rail 34 and is fixedly connected to the fixed rail 34 by bolts 36; that is, the fixed pressure plate 35 and the fixed rail 34 both clamp the lower die base 20, so that the position of the fixed rail 34 is fixed on the lower die base 20 and is not easy to loosen, thereby making the installation of the test plate 31 more accurate. Specifically, two fixed pressure plates 35 are disposed on each of the fixed rails 34 on one side, so the number of fixed pressure plates 35 is 4 in total, which plays a further reinforcement role.

[0033] As a preferred embodiment, a plurality of slots 341 are provided on the fixed rail 34. Figure 3 Since there are multiple rows of mold base through holes 21, interference testing needs to be performed on each row of mold base through holes 21. Multiple slots 341 are provided on the fixed rail 34. As long as the test plate 31 is taken out of a slot 341 and installed in another slot 341, interference testing and troubleshooting can be performed on another row of mold base through holes 21. Through this implementation, each row of mold base through holes 21 can be tested and troubleshooted. At the same time, it can also be used for switching molds with different specifications.

[0034] As a preferred embodiment, the test plate 31 is provided with a plurality of bayonet holes 313, which are fixedly engaged with the slots 341. Since the lower die base 20 has a variety of different sizes, the test plate 31 is provided with a plurality of bayonet holes 313 accordingly, and the fixed rail 34 can be adjusted to select a suitable bayonet hole 313 for matching according to the different widths of the lower die base 20. Through this embodiment, molds of different sizes can be applied, which is conducive to cost saving.

[0035] As a preferred embodiment, the test plate 31 further includes a second positioning key 314. The second positioning key 314 is fixedly connected to the test plate 31 by screws, and the lower die base 20 is correspondingly provided with a second keyway 23. The second positioning key 314 and the second keyway 23 are matched and fixed, so that the test plate 31 and the lower die base 20 can be quickly positioned. At the same time, since the second positioning key 314 is connected by screws and the second positioning key 314 is detachable, the test plate 31 can be applied to the lower die base 20 with a through keyway or a non-through keyway.

[0036] As a preferred embodiment, the test board 31 further includes a support pad 312. Figure 5 The support pad 312 is arranged at the bottom of the test plate 31 and is located near the center of the test plate 31. The support pad 312 is attached to the lower surface of the lower die base 20 to support and cushion the test plate 31. Since the size of the lower die base 20 is relatively large, the length of the test plate 31 is also relatively long. If the test plate 31 is only fixed at both ends, the middle part is prone to deformation. By setting the support pad 312, the problem of easy deformation can be solved, and the service life of the test plate 31 is increased.

[0037] As a preferred embodiment, the test rod 32 is provided with a plurality of pin holes 321 of different heights, and the side of each pin hole 321 is engraved with a corresponding stroke value. Since the lower die base 20 has a variety of different sizes, the depths of the die base through holes 21 are also inconsistent. Therefore, the pin holes 321 of different heights are provided on the test rod 32 to facilitate matching with lower die bases 20 of different specifications; and the stroke value facilitates quick finding of the pin hole 321 of the corresponding height and installation of the test rod 32.

[0038] The installation process of the present invention is as follows: place the fixed rail 34 on the edge of the lower die base 20 and position it through the first positioning key 342; after positioning, use the bolt 36 to fix the fixed pressure plate 35 and the fixed rail 34 to fix the position of the fixed rail 34; install the test rod 32 in the test plate 31 with the limit pin 33; install the bayonet 313 of the test plate 31 on the slot 341 of the fixed rail 34, and insert the test rod 32 into the die base through hole 21. By observing the height of each test rod 32 and whether it is lifted up, it can be judged whether interference occurs in the corresponding die base through hole 21.

[0039] Through the detailed description of the above embodiments, it can be understood that the present invention plays a role in simulating the air cushion push rod 10. Before the stamping process, the air cushion push rod 10 is plugged and matched with the lower die seat 20, and the interference can be visually tested and checked in advance. The unqualified lower die seat 20 can be reprocessed and corrected in time, so that the air cushion push rod 10 on the machine is protected from frequent maintenance and replacement, saving economic and labor costs, and ensuring the production progress. In addition, the present invention is a detachable installation structure, and the operator can save the occupied space by disassembling it. It is also convenient to carry, store, and move, which is also conducive to saving manufacturing costs.

[0040] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A device for checking interference of a mandrel, characterized in that: include: A test plate and a test rod; the test plate is provided with a plurality of ejector holes, the ejector holes being matched with the die base through holes of the lower die base; the test rod is a cylindrical structure and can be movably arranged in each of the ejector holes, the length of the test rod being greater than the depth of the die base through holes; the test plate is attached to the lower surface of the lower die base, and the test rod is inserted into the die base through holes; The test rod is provided with a pin hole, a limit pin is inserted into the pin hole, and the test rod is movably arranged on the test plate through the cooperation between the pin hole and the limit pin; The ejector interference troubleshooting device further comprises a fixed rail; the fixed rail is arranged on the lower surface of the lower die base, a card slot is arranged on the fixed rail, a card slot matching the card slot is arranged on the test plate, and the test plate and the fixed rail are engaged and fixed; A first positioning key is also provided at one end of the fixed rail, and a first key slot is correspondingly provided on the lower die base, and the first positioning key is matched and fixed with the first key slot on the lower die base to position the fixed rail; The ejector interference troubleshooting device further comprises a fixed pressing plate; the fixed pressing plate is arranged at the bottom of the fixed rail and is fixedly connected to the fixed rail by bolts to fix the fixed rail on the lower die seat; The test rod is provided with a plurality of pin holes of different heights; the side of each pin hole is engraved with a corresponding stroke value; Place the fixed rail to the edge of the lower mold base and position it using the first positioning key; after positioning, fix the fixed pressure plate and the fixed rail with bolts to fix the position of the fixed rail; install the test rod in the test plate with the limit pin, install the bayonet on the slot, and insert the test rod into the mold base through hole; by observing whether the height of each test rod is lifted up, it can be determined whether interference occurs in the corresponding mold base through hole.

2. The device for checking interference of the ejector pin according to claim 1, characterized in that: The fixed rail is provided with a plurality of slots.

3. The device for checking interference of ejector pins according to claim 1, characterized in that: The test board is provided with a plurality of bayonet holes.

4. The device for checking interference of ejector pins according to claim 1, characterized in that: The test plate also includes a second positioning key, which is fixedly connected to the test plate by screws. A second keyway is correspondingly provided on the lower die base, and the second positioning key is fixedly matched with the second keyway to position the test plate.

5. The device for checking interference of ejector pins according to claim 1, characterized in that: The test plate also includes a support pad; the support pad is arranged at the bottom of the test plate and is located close to the center of the test plate; the support pad is attached to the lower surface of the lower mold base.

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