Excavator counterweight outer plate drawing die

Abstract

The utility model provides an excavator counterweight outer plate drawing die, which belongs to the technical field of excavator production, and comprises an upper die, a lower die and a blank holder, the upper die is positioned above the lower die, and the blank holder is positioned between the upper die and the lower die; a plurality of adjusting cushion blocks are arranged on the top surface of the blank holder, and the plurality of adjusting cushion blocks are uniformly arranged along the periphery of the top surface of the blank holder. The gap between the upper die and the blank holder can be adjusted when the upper die and the blank holder are closed, the inflow speed of plate materials can be controlled, and the finished product quality of the outer counter weight plate of the excavator during drawing is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to excavator production technical field especially relates to a drawing die of excavator counterweight outer plate. BACKGROUND

[0002] In the manufacturing process of large excavator counterweight assembly, the counterweight outer plate as a key component directly affects the overall stability and service life of the excavator. The traditional counterweight outer plate production method adopts multiple steel plate tailor welding process, which has the problems of poor appearance, low production efficiency, low material utilization rate, and difficult control of finished product precision.

[0003] With the continuous progress of industrial technology, the appearance design is more and more complex, and the existing manufacturing process cannot meet the quality and appearance requirements; the drawing process is gradually widely used in the field of engineering machinery manufacturing due to its advantages of high efficiency, accuracy and material saving.

[0004] Because the size of the excavator counterweight outer plate is large and the shape is complex, the existing drawing die cannot adjust the material inflow, which is prone to wrinkle and crack during forming, affecting the forming precision. UTILITY MODEL CONTENTS

[0005] In view of the defects or deficiencies in the prior art, the utility model provides a drawing die for excavator counterweight outer plate, which can adjust the gap between the upper die and the blank holder when closed, control the inflow speed of the plate material, and ensure the finished product quality of the excavator counterweight outer plate during drawing.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The embodiment of the utility model provides a drawing die for excavator counterweight outer plate, which comprises an upper die, a lower die and a blank holder, the upper die is located above the lower die, and the blank holder is located between the upper die and the lower die.

[0008] The top surface of the blank holder is provided with adjusting pads, the adjusting pads are provided with a plurality of adjusting pads, and the adjusting pads are evenly arranged around the top surface of the blank holder.

[0009] Further, the upper die comprises an upper die seat, and the bottom of the upper die seat is provided with a concave die cavity.

[0010] Further, the front and rear ends of the upper die seat are provided with first guide plates.

[0011] Further, the lower die comprises a lower die seat, and the upper surface of the lower die seat is provided with a convex die, and the upper surface of the convex die is processed with a convex die cavity matched with the concave die cavity.

[0012] Further, an annular groove is arranged between the convex die and the side wall of the lower die seat for accommodating the blank holder.

[0013] Further, the lower die seat is symmetrically provided with a second guide plate at both left and right ends.

[0014] Further, the top surface of the blank holder is processed with a shape matched with the upper die seat for pressing the blank around.

[0015] Further, the blank holder is provided with a material blocking plate at the outer edge of the top around, and the material blocking plates are arranged side by side in pairs.

[0016] Further, the blank holder is provided with a third guide plate on each side surface, and two third guide plates are arranged on each side surface and fixed at both ends of the side surface of the blank holder.

[0017] Further, the lower die seat is provided with a limiting block at the top surface of four corners for limiting the position of the upper die when descending.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] 1. The utility model discloses a plurality of adjusting pads are arranged on the top surface of the blank holder, so that the gap between the upper die and the blank holder when closing is adjusted, the frictional resistance in the forming process is controlled, the inflow of the blank is controlled, the wrinkling and cracking phenomenon in the forming is avoided, and the finished product quality of the excavator counterweight outer plate in the drawing process is guaranteed.

[0020] 2. The utility model discloses a first guide plate is arranged on the upper die seat, a second guide plate is arranged on the lower die seat, and a third guide plate is arranged on the blank holder, so that the accurate alignment of each matching component is ensured, and the mold is prevented from deviating or being damaged.

[0021] 3. The utility model discloses a limiting block is arranged at the top surface of four corners of the lower die seat for limiting the position of the upper die when descending, and the part is prevented from being pressed by excessive descending. DRAWINGS

[0022] Figure 1 It is a drawing die structure schematic view in the utility model embodiment;

[0023] Wherein, 1, the upper die seat, 2, the blank holder, 3, the male die, 4, the lower die seat, 5, the material blocking plate, 6, the first guide plate, 7, the adjusting pad, 8, the third guide plate, 9, the lifting bar, 10, the side pin, 11, the limiting block, 12, the second guide plate. DETAILED DESCRIPTION

[0024] A typical embodiment of the utility model, such as Figure 1As shown, a kind of excavator counterweight outer plate drawing die, including upper die, lower die and binder 2, upper die is located above lower die, binder 2 is located between upper die and lower die. Upper die and lower die are respectively provided with the cavity that is adapted to the shape of counterweight outer plate, the cavity surface has higher machining precision, to ensure forming quality. Binder 2 is annular structure, is installed in annular groove between punch 3 and lower die holder 4 side wall, is used for up and down movement by press rod force, and is cooperated with upper die to press tightly around sheet metal, controls material inflow, makes sheet metal reach plastic deformation when forming, ensures that there is no wrinkle cracking phenomenon in forming, improves forming precision.

[0025] Specifically, the upper die includes an upper die holder 1, which is integrally cast. The bottom of the upper die holder 1 is provided with a concave cavity. First guide plates 6 are arranged at the front and rear ends of the upper die holder 1. The first guide plates 6 realize the guidance between the upper die and the lower die, ensuring the accurate position of the upper and lower dies.

[0026] The lower die includes a lower die holder 4. A punch 3 is arranged on the upper surface of the lower die holder 4. The upper surface of the punch 3 is provided with a convex cavity that is adapted to the concave cavity. An annular groove is arranged between the punch 3 and the side wall of the lower die holder 4, for accommodating the binder 2 during machining. Second guide plates 12 are symmetrically arranged at the left and right ends of the lower die holder 4. The second guide plates 12 realize the guidance between the upper die and the lower die, ensuring the accurate position of the upper and lower dies.

[0027] Lifting bars 9 are arranged at the four corners of the upper die holder 1 and the lower die holder 4. The lifting bars 9 can be connected to hoisting devices through lifting ropes, for hoisting the die and facilitating the movement of the die.

[0028] The top surface of the binder 2 is provided with a shape that cooperates with the upper die holder 1 to press the sheet metal around. Material blocking plates 5 are arranged around the top of the binder 2. The material blocking plates 5 are arranged in pairs. The material blocking plates 5 are used to limit the position of the blank sheet metal in the die, ensuring the accurate position of the blank sheet metal in the die.

[0029] Adjusting pads 7 are arranged on the top surface of the binder 2. The adjusting pads 7 are arranged uniformly around the top surface of the binder 2. The adjusting pads 7 are used to adjust the gap between the upper die and the binder 2 when they are closed, thereby controlling the frictional resistance in the forming process, and further controlling the inflow amount of the sheet metal during forming, ensuring the forming quality and stability.

[0030] Third guide plates 8 are arranged on the four sides of the binder 2. Two third guide plates 8 are arranged on each side. The two third guide plates 8 are fixed at the two ends of the side of the binder 2. The binder 2 is guided by the third guide plates 8 and the lower die holder 4, ensuring the accurate position of the binder 2 and the lower die holder 4.

[0031] By setting the first guide plate 6, the second guide plate 12 and the third guide plate 8, the accurate alignment of the components is ensured, and the mold is prevented from being deviated or damaged.

[0032] The lower die seat 4 is provided with a limiting block 11 at the top of four corners, which is used for limiting the position of the lower die when descending, and preventing the part from being pressed and damaged due to excessive descent.

[0033] The side pin 10 is symmetrically arranged on the front and rear side surfaces of the lower die seat 4, and the slide groove is arranged on the corresponding position of the side pin 10, which is matched with the side pin 10.

[0034] Working principle

[0035] The mold is installed on the press, the upper die is fixed on the upper slide block of the press, and the lower die is fixed on the workbench of the press; the upper slide block of the press is opened, and the upper die is driven to move upward together; the pressure ring 2 is installed above the lower die seat 4 and is required to be sleeved outside the convex die 3, the ejector rod of the press is set to a reasonable ejecting force and an ejecting stroke and is upwardly ejected to act on the bottom of the pressure ring 2 to lift it; the blank plate is arranged on the upper part of the pressure ring 2, and the position of the plate is fixed through the blocking plate 5; in the next step, the upper slide block of the press is moved downward to drive the upper die to move downward at the same time until the pressure ring 2 is closed, the plate is pressed around, and then the upper die drives the pressure ring 2 to move downward together, in the process, the convex die 3 gradually contacts the plate to cause the plate to be deformed, the shape of the part gradually appears, and finally the plate is formed through the interaction of the convex die 3 and the upper die cavity when the mold works to the bottom, and a qualified drawing part is obtained.

[0036] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can be changed and varied. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drawing die for the outer plate of an excavator counterweight, characterized in that, It includes an upper die, a lower die, and a pressure ring, wherein the upper die is located above the lower die, and the pressure ring is located between the upper die and the lower die; The top surface of the pressure ring is provided with an adjustment pad, and there are multiple adjustment pads, which are evenly arranged around the top surface of the pressure ring. The upper mold includes an upper mold base, and a concave mold cavity is formed at the bottom of the upper mold base; first guide plates are provided at the front and rear ends of the upper mold base.

2. The excavator counterweight outer plate drawing die as described in claim 1, characterized in that, The lower mold includes a lower mold base, and a punch is provided in the middle of the upper surface of the lower mold base. The upper surface of the punch is machined with a punch cavity that matches the concave mold cavity.

3. The excavator counterweight outer plate drawing die as described in claim 2, characterized in that, An annular groove is provided between the punch and the side wall of the lower die base to accommodate the pressure ring.

4. The excavator counterweight outer plate drawing die as described in claim 2, characterized in that, The lower mold base is symmetrically provided with second guide plates at both the left and right ends.

5. The excavator counterweight outer plate drawing die as described in claim 1, characterized in that, The top surface of the pressure ring is machined with a shape that mates with the upper mold base to press the plate around its perimeter.

6. The excavator counterweight outer plate drawing die as described in claim 1, characterized in that, Each of the four outer edges of the top of the pressure ring is provided with a baffle plate, and the baffle plates are arranged in pairs side by side.

7. The excavator counterweight outer plate drawing die as described in claim 1, characterized in that, The pressure ring is provided with a third guide plate on all four sides, with two third guide plates on each side, and the two third guide plates are fixed at both ends of the side of the pressure ring respectively.

8. The excavator counterweight outer plate drawing die as described in claim 2, characterized in that, Limiting blocks are provided at the four corners of the top surface of the lower mold base to limit the position of the upper mold when it moves downward.

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