Measuring device for gap of drawing die

Abstract

The invention relates to the technical field of dies, and particularly discloses a drawing die gap measuring device which is arranged on a drawing die and used for measuring the die assembly gap of the drawing die, the drawing die is connected with a press machine, the press machine comprises a plurality of stand columns distributed in a rectangular mode, and the drawing die comprises a movable die and a fixed die which are distributed up and down. A plurality of guide supporting columns distributed in a rectangular mode are fixedly installed at the top of the fixed mold, a plurality of guide sleeves corresponding to the guide supporting columns are fixedly installed at the bottom of the movable mold, and a plurality of guide reinforcing mechanisms corresponding to the guide sleeves are arranged at the bottom of the movable mold. The two tightly-held arc-shaped half blades achieve second-stage guiding of vertical downward moving and mold closing of the movable mold, through interference fit second-stage guiding formed between the balls and the stand columns, an initial gap between the guiding stand columns and the guiding sleeves is eliminated, transverse deviation of the movable mold is limited, and horizontal micro movement of the movable mold during mold closing is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molds, more particularly, it relates to a measuring device for a draw die gap. BACKGROUND

[0002] As the core equipment in the field of stamping forming, the cooperation gap between the male die and the female die of the draw die (draw die gap) directly determines the forming quality of the metal sheet. Therefore, the precise measurement and control of the draw die gap is a key technical link throughout the whole cycle of mold design, debugging, production and maintenance. At present, the draw die gap measurement is generally realized by installing a displacement sensor on the surface of the fixed die through an elastic member. When the movable die and the fixed die are guided by the guide pillars and the guide sleeves, the closing pressure will compress the elastic member to make the displacement sensor displace. The sensor synchronously displaces with the compression of the elastic member, and the internal sensing element converts the mechanical displacement into an electrical signal. After the electrical signal is processed by an amplification circuit, it directly corresponds to the closing gap value. However, this measurement method still has some defects: The movable die and the fixed die only rely on the gap cooperation of the guide pillars and the guide sleeves to provide static guidance, and there is an initial assembly gap between them. During the closing process, a large impact reaction force will be generated when the movable die and the fixed die contact. Since the guide pillars and the guide sleeves are gap-cooperated and lack rigid constraint mechanism, the reaction force cannot be transmitted through a stable load chain, which may cause horizontal micro-motion of the movable die at the moment of vertical closing due to uneven stress. This horizontal micro-motion will directly lead to the decrease of the centering property of the mold during the closing process, so that the measurement result of the sensor contains errors caused by position deviation, which leads to that the gap measurement value cannot truly reflect the actual cooperation state of the mold, and further affects the precision control in the mold debugging and production process. SUMMARY

[0003] The present application provides a measuring device for a draw die gap to solve the above technical problems.

[0004] The present application provides a measuring device for a draw die gap, which is arranged on the draw die for measuring the closing gap of the draw die. The draw die is connected with a press machine, the press machine includes a plurality of vertical columns distributed in a rectangular shape, the draw die includes a movable die and a fixed die distributed in an up-down manner, the top of the fixed die is fixedly installed with a plurality of guide pillars distributed in a rectangular shape, the bottom of the movable die is fixedly installed with a plurality of guide sleeves corresponding to the guide pillars, and the bottom of the movable die is provided with a plurality of guide strengthening mechanisms corresponding to the guide sleeves.

[0005] The guide strengthening mechanism includes a clamping assembly for clamping the corresponding vertical column when the movable die and the fixed die approach the closing, and a meshing assembly for controlling the opening and closing of the clamping assembly. The guide sleeve and the meshing assembly are provided with a traction assembly for driving the meshing assembly.

[0006] The locking mechanism is arranged between the embracing assembly and the column and is used for locking the embracing assembly before mold closing and guiding the embracing assembly.

[0007] Further, the press further comprises a mounting table, the columns are fixedly installed on the top of the mounting table, the top ends of the columns are jointly installed with a top frame, the outer sides of the columns are jointly and slidably installed with a driving frame, the fixed mold is fixedly installed on the bottom of the driving frame, and the movable mold is fixedly installed on the top of the mounting table.

[0008] Further, the embracing assembly comprises an installation frame fixedly installed on the bottom of the movable mold through an installation rod and two hinged rods rotationally installed on the bottom of the installation frame and symmetric to each other, arc-shaped half leaves are fixedly installed on the ends of the hinged rods away from the installation frame, and a plurality of rolling balls are rotationally installed on the inner walls of the arc-shaped half leaves.

[0009] Further, the locking mechanism comprises a locking sleeve fixedly installed on the side of the arc-shaped half leaves away from the installation frame, the outer sides of the columns are fixedly installed with installation sleeves, and the top of the installation sleeve is fixedly installed with a locking pin matched with the locking sleeve.

[0010] Further, the engaging assembly comprises a fixed plate fixedly installed on the inner wall of the bottom of the installation frame, and a double-sided rack is fixedly installed on the side of the fixed plate close to the guide sleeve through a reset spring.

[0011] Further, the rotating shaft of the hinged rod is rotationally penetrated through the inner wall of the bottom of the installation frame and is fixedly sleeved with a gear engaged with the double-sided rack.

[0012] Further, the traction assembly comprises two upper fixed pulleys fixedly installed on the inner wall of the bottom of the installation frame and two lower fixed pulleys fixedly installed on the bottom of the installation frame, and the outer sides of the upper fixed pulleys and the lower fixed pulleys are jointly and wound with a traction rope.

[0013] Further, the outer side of the guide sleeve is slidably installed with a limiting ring, the limiting ring is fixedly installed with a T-shaped plate on the side of the limiting ring close to the installation frame, and the two ends of the traction rope are fixedly connected with the double-sided rack and the T-shaped plate respectively.

[0014] Further, the outer side of the guide sleeve is fixedly installed with a supporting ring for supporting the limiting ring, the top inner wall of the guide sleeve is slidably installed with a control plate, the side of the guide sleeve close to the installation frame is provided with a sliding groove slidably connected with the control plate, the T-shaped plate extends into the sliding groove, and the bottom of the control plate is fixedly installed with a sliding plate through a strong spring.

[0015] Further, the measuring mechanism comprises a pressure bearing groove provided on the top of the fixed mold and a displacement sensor fixedly installed on the inner wall of the bottom of the pressure bearing groove through a pressure receiving spring.

[0016] The beneficial effects of the present application are that: 1、In the application, as the movable die approaches the fixed die to close the mold, the two arc-shaped half leaves hold the column through the ball, and the two arc-shaped half leaves after holding realize the secondary guidance of the vertical downward movement of the movable die, the secondary guidance formed by the interference fit between the ball and the column eliminates the initial gap between the guide pillar and the guide sleeve, limits the horizontal deviation of the movable die, avoids the horizontal micro-motion of the movable die during the closing of the mold, and further greatly improves the closing stability of the movable die and the fixed die, so that the subsequent closing gap measurement is more accurate.

[0017] 2、In the application, after the holding assembly holds the column, the locking sleeve is sleeved outside the locking pin to rigidly lock the holding assembly and the column and provide rigid guidance to the holding mechanism, forming a three-stage rigid constraint of the guidance, ensuring the position of the movable die fixed, through the cooperation of the guide strengthening mechanism and the locking mechanism, the closing force forms a rigid load chain along the movable die, arc-shaped half leaf, locking sleeve, locking pin, column and mounting table for transmission, completely eliminating the horizontal micro-motion of the movable die due to the closing reaction force, and further ensuring the repeatability of the movable die position, significantly improving the closing stability and gap measurement accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective structural schematic diagram of the application.

[0019] Figure 2 is a perspective structural schematic diagram of the guide pillar, guide sleeve, guide strengthening mechanism and locking mechanism of the application.

[0020] Figure 3 is a perspective structural schematic diagram of the locking sleeve, mounting sleeve and locking pin of the application.

[0021] Figure 4 is a perspective structural schematic diagram of the application Figure 3 is a partial enlarged view of part A of the application.

[0022] Figure 5 is a perspective structural schematic diagram of the pressure receiving groove, pressure receiving spring and displacement sensor of the application.

[0023] Figure 6 is a perspective structural schematic diagram of the mounting bracket, hinged rod, arc-shaped half leaf and ball of the application.

[0024] Figure 7 is a perspective structural schematic diagram of the fixed plate, reset spring, double-sided rack and gear of the application.

[0025] In the figure: 1, drawing die; 11, fixed die; 12, movable die; 2, guide pillar; 3, guide sleeve; 4, guide reinforcing mechanism; 41, clamping assembly; 411, mounting frame; 412, articulated rod; 413, arc-shaped half leaf; 414, ball; 415, mounting rod; 42, meshing assembly; 421, fixed plate; 422, return spring; 423, double-sided rack; 424, gear; 43, traction assembly; 431, upper fixed pulley; 432, lower fixed pulley; 433, traction rope; 434, T-shaped plate; 435, limiting ring; 436, supporting ring; 437, strong spring; 438, control plate; 439, sliding groove; 430, sliding plate; 5, locking mechanism; 51, locking sleeve; 52, mounting sleeve; 53, locking pin; 6, measuring mechanism; 61, pressure receiving groove; 62, pressure receiving spring; 63, displacement sensor; 7, mounting table; 8, top frame; 9, column; 10, drive frame. DETAILED DESCRIPTION

[0026] The subject matter described herein will now be discussed with reference to example implementations. It should be appreciated that these implementations are discussed in order to enable those with ordinary skill in the art to better understand and thus utilize the subject matter described herein. Alterations and modifications to the function and arrangement of the elements discussed can be made without departing from the scope of the subject matter as covered by the present document. Various examples can omit, substitute, or add various procedures or components as appropriate. Also, the description as described with respect to some examples can also apply to other examples.

[0027] Reference Figure 1 and Figure 2 In this embodiment, a drawing die gap measuring device is provided on the drawing die 1 for measuring the die gap of the drawing die 1, the drawing die 1 is connected with a press machine, the press machine includes a mounting table 7, the top of the mounting table 7 is fixedly installed with a plurality of columns 9 distributed in a rectangular shape, the top ends of the columns 9 are jointly installed with a top frame 8, the outer sides of the columns 9 are jointly and slidably installed with a drive frame 10, the fixed die 11 is fixedly installed at the bottom of the drive frame 10, and the movable die 12 is fixedly installed at the top of the mounting table 7.

[0028] It should be noted that the top of the top frame 8 is provided with a driving structure for controlling the lifting of the drive frame 10, which is preferably a hydraulic cylinder.

[0029] Reference Figure 1 and Figure 2 The drawing die 1 includes the movable die 12 and the fixed die 11 distributed in an up-down manner, the top of the fixed die 11 is fixedly installed with a plurality of guide pillars 2 distributed in a rectangular shape, the bottom of the movable die 12 is fixedly installed with a plurality of guide sleeves 3 corresponding to the guide pillars 2, and the bottom of the movable die 12 is provided with a plurality of guide reinforcing mechanisms 4 corresponding to the guide sleeves 3.

[0030] Reference Figure 1 ,Figure 2 and Figure 3 The guide reinforcement mechanism 4 includes a clamping component 41 for following the movable mold 12 and the fixed mold 11 to close the mold and clamp the corresponding column 9 to eliminate the guide gap and suppress the lateral deviation, and a meshing component 42 for controlling the opening and closing of the clamping component 41. A traction component 43 for pulling and driving the meshing component 42 is provided between the guide sleeve 3 and the meshing component 42. See Figure 3 、 Figure 4 、 Figure 6 and Figure 7 The clamping assembly 41 includes a mounting frame 411 fixedly mounted on the bottom of the movable mold 12 through a mounting rod 415 and two hinged rods 412 rotatably mounted on the bottom of the mounting frame 411 and symmetrical to each other. An arc-shaped half leaf 413 is fixedly mounted on one end of the hinged rod 412 away from the mounting frame 411, and a plurality of balls 414 are rotatably mounted on the inner wall of the arc-shaped half leaf 413. When the two arc-shaped half leaves 413 are closed, they roll and clamp the column 9 through the balls 414.

[0031] See Figure 6 and Figure 7 The meshing assembly 42 includes a fixed plate 421 fixedly mounted on the bottom inner wall of the mounting frame 411. The fixed plate 421 is fixedly mounted with a double-sided rack 423 on the side close to the guide sleeve 3 through a return spring 422. The top end of the rotating shaft of the hinged rod 412 rotates through the bottom inner wall of the mounting frame 411 and is fixedly sleeved with a gear 424 that meshes with the double-sided rack 423.

[0032] See Figure 4 、 Figure 6 and Figure 7 The traction assembly 43 includes two upper fixed pulleys 431 fixedly mounted on the inner wall of the bottom of the mounting frame 411 and two lower fixed pulleys 432 fixedly mounted on the bottom of the mounting frame 411. A traction rope 433 is wound around the outer side of the upper fixed pulley 431 and the lower fixed pulley 432. A limiting ring 435 is slidably installed on the outer side of the guide sleeve 3. A T-shaped plate 434 is fixedly mounted on the side of the limiting ring 435 close to the mounting frame 411. The two ends of the traction rope 433 are respectively fixedly connected to the double-sided rack 423 and the T-shaped plate 434.

[0033] See Figure 4 、 Figure 6 and Figure 7 A support ring 436 for supporting the limit ring 435 is fixedly installed on the outside of the guide sleeve 3, and a control plate 438 is slidably installed on the top inner wall of the guide sleeve 3. A sliding groove 439 is provided on the side of the guide sleeve 3 close to the mounting frame 411, which is slidably connected to the control plate 438. The T-shaped plate 434 extends into the sliding groove 439, and the bottom of the control plate 438 is fixedly installed with a sliding plate 430 by a strong spring 437.

[0034] In specific use, the hydraulic cylinder drives the driving frame 10 to move downward under the guidance of the column 9, thereby pushing the movable mold 12 to gradually move downward to approach the fixed mold 11, and the guide sleeve 3 gradually approaches and is sleeved outside the guide pillar 2, and as the guide sleeve 3 is gradually sleeved outside the guide pillar 2, the guide pillar 2 pushes the sliding plate 430 upward, thereby pushing the control plate 438 to move upward along the sliding groove 439 through the strong spring 437, and when the control plate 438 contacts the part of the T-shaped plate 434 extending into the sliding groove 439, the control plate 438 continues to move upward to push the T-shaped plate 434 upward, thereby pulling the traction rope 433 upward.

[0035] The upward pulling force is converted into horizontal pulling force under the action of the lower fixed pulley 432 and the upper fixed pulley 431, thereby pulling the rack to slide to the side close to the mounting frame 411 and compressing the return spring 422, further driving the two gears 424 to rotate, rotating the two hinged rods 412 to the side close to the column 9, so that the two arc-shaped half leaves 413 also move synchronously, thereby pulling the two arc-shaped half leaves 413 to tightly hold the column 9 through the balls 414, and the two arc-shaped half leaves 413 after being tightly held realize the secondary guidance of the movable mold 12 in vertical downward movement, the secondary guidance formed by the interference fit between the balls 414 and the column 9 eliminates the initial gap between the guide pillar 2 and the guide sleeve 3, limits the lateral deviation of the movable mold 12, avoids the horizontal micro-motion of the movable mold 12 during the clamping, and further greatly improves the clamping stability of the movable mold 12 and the fixed mold 11, so that the measurement of the subsequent clamping gap is more accurate.

[0036] Referring to Figure 1 and Figure 3 , the locking mechanism 5 for locking and guiding the tightly holding assembly 41 before clamping is arranged between the tightly holding assembly 41 and the column 9, and the top of the fixed mold 11 is provided with a plurality of measuring mechanisms 6 for measuring the gap between the movable mold 12 and the fixed mold 11 after clamping.

[0037] Referring to Figure 1 and Figure 3 , the locking mechanism 5 comprises a locking sleeve 51 fixedly installed on the side of the arc-shaped half leaf 413 away from the mounting frame 411, the outer side of the column 9 is fixedly installed with a mounting sleeve 52, the top of the mounting sleeve 52 is fixedly installed with a locking pin 53 matched with the locking sleeve 51, and the locking sleeve 51 and the locking pin 53 are vertically aligned when the two arc-shaped half leaves 413 are closed.

[0038] Referring to Figure 1 , Figure 2 and Figure 5 , the measuring mechanism 6 comprises a pressure bearing groove 61 opened in the top of the fixed mold 11 and a displacement sensor 63 fixedly installed in the inner wall of the bottom of the pressure bearing groove 61 through a pressure spring 62.

[0039] Specifically, when the two arc-shaped half leaves 413 are clamped around the column 9 by the balls 414, the locking sleeves 51 on the two arc-shaped half leaves 413 are also relatively butted and aligned with the locking pins 53, at this time, the T-shaped plate 434 is in contact with the top wall of the sliding groove 439, then, as the movable mold 12 continues to move downward, the mold closing will continue to extrude the sliding plate 430 and start to compress the strong spring 437, drive the locking sleeve 51 to slide and set outside the locking pin 53, rigidly lock the clamping assembly 41 with the column 9 and provide rigid guidance to the clamping mechanism, form a three-level guided rigid constraint, ensure the position of the movable mold 12 fixed, then the movable mold 12 continues to move downward, compresses the compressed spring 62 in the pressure receiving groove 61 at the top of the fixed mold 11, the displacement sensor 63 accurately measures the mold closing gap through the spring compression amount, through the cooperation of the guiding strengthening mechanism 4 and the locking mechanism 5, the mold closing force forms a rigid load chain along the movable mold 12, the arc-shaped half leaf 413, the locking sleeve 51, the locking pin 53, the column 9 and the mounting table 7 to transfer, completely eliminate the horizontal micro-motion of the movable mold 12 due to the mold closing reaction force, and further ensure the position repeatability of the movable mold 12, significantly improve the mold closing stability and the gap measurement accuracy.

[0040] Finally, it should be noted that: obviously, the above embodiments are only examples for clearly illustrating the present application, and are not limitations on the embodiments. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the scope of the present application.

Claims

1. A device for measuring the gap of a drawing die, arranged on a drawing die (1) and used for measuring the gap of the drawing die (1), characterized in that: The drawing die (1) is connected to a press, the press includes a plurality of uprights (9) distributed in a rectangular manner, the drawing die (1) includes a movable die (12) and a fixed die (11) distributed in an upper and lower manner, the top of the fixed die (11) is fixedly mounted with a plurality of guide pillars (2) distributed in a rectangular manner, the bottom of the movable die (12) is fixedly mounted with a plurality of guide sleeves (3) corresponding to the guide pillars (2), and the bottom of the movable die (12) is provided with a plurality of guide reinforcement mechanisms (4) corresponding to the guide sleeves (3); The guide reinforcement mechanism (4) comprises a clamping assembly (41) for clamping the corresponding column (9) with the movable mold (12) and the fixed mold (11) when the mold is close to the clamping mold, and a meshing assembly (42) for controlling the opening and closing of the clamping assembly (41); a traction assembly (43) for pulling and driving the meshing assembly (42) is provided between the guide sleeve (3) and the meshing assembly (42); A locking mechanism (5) is provided between the clamping assembly (41) and the column (9) for locking the clamping assembly (41) and guiding the clamping assembly (41) before mold closing, and a plurality of measuring mechanisms (6) are provided on the top of the fixed mold (11) for measuring the gap between the movable mold (12) and the fixed mold (11) after mold closing.

2. The device for measuring the drawing die gap according to claim 1, wherein: The press also includes a mounting platform (7), a column (9) fixedly mounted on the top of the mounting platform (7), a top frame (8) commonly mounted on the tops of a plurality of columns (9), a driving frame (10) commonly slidably mounted on the outsides of a plurality of columns (9), a fixed mold (11) fixedly mounted on the bottom of the driving frame (10), and a movable mold (12) fixedly mounted on the top of the mounting platform (7).

3. The device for measuring the drawing die gap according to claim 1, wherein: The clamping assembly (41) comprises a mounting frame (411) fixedly mounted on the bottom of the movable mold (12) via a mounting rod (415) and two hinged rods (412) rotatably mounted on the bottom of the mounting frame (411) and symmetrical to each other. An arcuate half leaf (413) is fixedly mounted on one end of the hinged rod (412) away from the mounting frame (411), and a plurality of balls (414) are rotatably mounted on the inner wall of the arcuate half leaf (413).

4. The device for measuring the drawing die gap according to claim 3, wherein: The locking mechanism (5) comprises a locking sleeve (51) fixedly mounted on a side of the arc-shaped half leaf (413) away from the mounting frame (411); a mounting sleeve (52) is fixedly mounted on the outer side of the column (9); and a locking pin (53) matched with the locking sleeve (51) is fixedly mounted on the top of the mounting sleeve (52).

5. The device for measuring the drawing die gap according to claim 3, wherein: The engagement assembly (42) includes a fixing plate (421) fixedly mounted on the inner wall of the bottom of the mounting frame (411), and a double-sided rack (423) is fixedly mounted on one side of the fixing plate (421) close to the guide sleeve (3) via a return spring (422).

6. The device for measuring the drawing die gap according to claim 5, characterized in that: The top end of the rotating shaft of the hinged rod (412) rotates through the inner wall of the bottom of the mounting frame (411) and is fixedly sleeved with a gear (424) that meshes with the double-sided rack (423).

7. The device for measuring the drawing die gap according to claim 6, characterized in that: The traction assembly (43) comprises two upper fixed pulleys (431) fixedly mounted on the inner wall of the bottom of the mounting frame (411) and two lower fixed pulleys (432) fixedly mounted on the bottom of the mounting frame (411), wherein a traction rope (433) is wound around the outer sides of the upper fixed pulleys (431) and the lower fixed pulleys (432).

8. The device for measuring the drawing die gap according to claim 7, characterized in that: A limiting ring (435) is slidably mounted on the outer side of the guide sleeve (3); a T-shaped plate (434) is fixedly mounted on one side of the limiting ring (435) close to the mounting frame (411); and both ends of the traction rope (433) are fixedly connected to the double-sided rack (423) and the T-shaped plate (434), respectively.

9. The device for measuring the drawing die gap according to claim 8, characterized in that: A support ring (436) for supporting a limiting ring (435) is fixedly mounted on the outer side of the guide sleeve (3); a control plate (438) is slidably mounted on the inner wall of the top of the guide sleeve (3); a sliding groove (439) slidably connected to the control plate (438) is provided on the side of the guide sleeve (3) close to the mounting frame (411); a T-shaped plate (434) extends into the sliding groove (439); and a sliding plate (430) is fixedly mounted on the bottom of the control plate (438) via a strong spring (437).

10. The device for measuring the drawing die gap according to claim 1, characterized in that: The measuring mechanism (6) comprises a pressure-bearing groove (61) provided on the top of the fixed mold (11) and a displacement sensor (63) fixedly mounted on the bottom inner wall of the pressure-bearing groove (61) via a pressure spring (62).

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