Oil press with buffer device

Abstract

The utility model discloses an oil press with a buffering device, which comprises an upper sliding block and a lower base, the upper sliding block moves up and down relative to the lower base, the lower base is provided with a buffering cylinder for buffering the upper sliding block, and the upper sliding block vertically opposite to the buffering cylinder is provided with a buffering lead screw mechanism with adjustable lifting. According to the oil press with the buffering device, the lifting-adjustable buffering lead screw mechanism is matched with the buffering cylinder, and the buffering effect that the lifting-adjustable buffering lead screw mechanism makes contact with the buffering cylinder is adjusted; the defects that an existing oil press is tedious in operation, low in efficiency and incapable of meeting the size requirement by manually replacing, adjusting, increasing, decreasing and matching cushion blocks are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic equipment, in particular to a hydraulic press with a buffer device. Background Art

[0002] When using a hydraulic press to produce metal products, some products have the technological requirement of blanking in the production process, and large vibrations will be generated during the production process. Currently, in addition to installing a buffer device on the mold, buffer devices are installed on both sides of the workbench of the hydraulic press to reduce the vibration of the equipment. In actual production, for molds with different thicknesses, the corresponding buffer points are also different. For the traditional buffer device used in a hydraulic press when the mold thickness is inconsistent, the traditional method is to install a backing plate on the buffer cylinder and adjust it manually. For example, when the height error on both sides is large, the force application points on both sides are at different heights, which affects the quality of the produced products. Moreover, manually adjusting and matching the pads to adapt to different heights and meet the dimensional requirements is troublesome, and it is more cumbersome to adjust molds with different heights.

[0003] For the above-mentioned disadvantages of the existing hydraulic press, such as the cumbersome operation, low efficiency, and inability to meet the dimensional requirements by manually adjusting and adding or removing matching pads, it has become an urgent technical problem to be solved. Content of the Utility Model

[0004] The purpose of the utility model is to provide a hydraulic press with a buffer device. The buffer screw mechanism with adjustable lifting cooperates with the buffer cylinder to achieve the buffer effect of contacting the buffer cylinder; to solve the disadvantages of the existing hydraulic press, such as the cumbersome operation, low efficiency, and inability to meet the dimensional requirements by manually replacing, adjusting, adding, or removing matching pads.

[0005] To achieve the above purpose, the technical solution provided by the utility model is: a hydraulic press with a buffer device, including an upper slider and a lower base. The upper slider moves up and down relative to the lower base. The lower base is provided with a buffer cylinder for buffering the upper slider, and the upper slider vertically opposite to the buffer cylinder is provided with a buffer screw mechanism with adjustable lifting.

[0006] By adopting the above technical solution of the utility model, the buffer screw mechanism adjusts its contact with the vertically opposite buffer cylinder in the vertical direction, can adapt to different movement strokes when the upper slider moves downward, adapt to different molds, has a wide range of uses, is automatically adjusted, and has high production efficiency.

[0007] The above hydraulic press with a buffer device has a buffer screw mechanism fixedly connected to the upper slider. The buffer screw mechanism includes a support body, a buffer screw disposed in the support body, and a servo motor adjustment mechanism. The buffer screw is vertically positioned in the support body, and its lower end face is vertically opposite to the buffer cylinder. The servo motor adjustment mechanism is rotationally connected to the buffer screw. By driving the buffer screw to move up and down in the vertical direction through the servo motor adjustment mechanism, the length of the lower end face of the buffer screw extending out of the support body can be adjusted. According to different molds provided on the upper slider and the lower base, the buffer screw can be adjusted, which is flexible to use and can automatically adjust the buffer screw when replacing different molds.

[0008] The above hydraulic press with a buffer device, the buffer screw mechanism further includes a limiting mechanism for limiting rotation. By the limiting mechanism, the rotation of the buffer screw is limited, so that the buffer screw mechanism can drive the buffer screw to move up and down in the vertical direction.

[0009] The above hydraulic press with a buffer device, the buffer screw mechanism includes a driven rotating gear, which has internal threads on its inner circle and driven teeth on its outer circle. The buffer screw is screwed in the internal threads of the driven rotating gear. The output shaft of the servo motor of the servo motor adjustment mechanism is provided with a driving gear, and the driving gear is connected to the driven teeth of the driven rotating gear. The servo motor drives the driving gear to rotate, and the driving gear drives the driven rotating gear to rotate. Due to the action of the limiting mechanism, the buffer screw screwed in the driven rotating gear will not rotate following the driven rotating gear. Through the threaded connection relationship, the buffer screw is driven to move up and down in the axial direction of the driven rotating gear.

[0010] The above hydraulic press with a buffer device, the support body is arranged on the upper slider, and a wear-resistant gasket is provided on the support body. The driven rotating gear is rotatably arranged in the wear-resistant gasket. The wear-resistant gasket supports the rotation of the driven rotating gear and prevents the driven rotating gear from moving axially, thereby realizing driving the buffer screw to move axially.

[0011] The above hydraulic press with a buffer device, the limiting mechanism includes a keyway arranged along the axial direction of the buffer screw and a limiting key fixed on the support body. The limiting key extends into and is positioned in the keyway. By the limiting key extending into the keyway, the buffer screw will not rotate following it.

[0012] The above hydraulic press with a buffer device, the servo motor is connected with a reducer, and the reducer is connected to the driving gear through a driving shaft. The reducer can amplify the output torque of the servo motor and reduce the working power of the servo motor.

[0013] The above hydraulic press with a buffer device, a limiting block is provided at the top end of the buffer screw. The limiting block limits the buffer screw from rising to the highest position.

[0014] In the above hydraulic press with a buffer device, an upper limit induction switch is provided on the limit block, and a lower limit induction switch is provided below the upper limit induction switch. The upper and lower limit induction switches respectively correspond to the upper and lower ends of the buffer screw rod. The highest and lowest positions of the screw rod lifting are detected through the upper limit induction switch and the lower limit induction switch.

[0015] In the above hydraulic press with a buffer device, a power hydraulic station is provided at the top of the body of the hydraulic press, and a main oil cylinder for driving the upper slider to lift is provided on the body.

[0016] The beneficial effects achieved by the present utility model are as follows: The buffer screw rod is controlled by a servo motor to extend downward, so that when the hydraulic press presses down, the buffer screw rod can cooperate with the buffer cylinder to obtain good buffering. The servo motor can accurately control the extension length of the buffer screw rod to adapt to different molds. When the mold is closed, the buffer screw rod follows the upper slider to descend. When the upper and lower molds are closed and approach each other, the bottom end of the buffer screw rod abuts against the buffer rod of the buffer cylinder to achieve effective buffering. A cushion block can be reduced between the buffer screw rod and the buffer rod, which solves the problem that the general adjustment mechanism cannot quickly and conveniently adjust the position at any time. By using the precise control of the servo motor, it saves time and effort; it solves the problem that the manual adjustment accuracy of the general adjustment mechanism is not high and the produced products are unreliable; it solves the problem that the general adjustment mechanism reduces the cost by adding cushion blocks with various precise sizes to cooperate with different molds. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of the hydraulic press with a buffer device according to an embodiment of the present utility model;

[0018] Figure 2 is a front view structural schematic diagram of the hydraulic press with a buffer device according to an embodiment of the present utility model;

[0019] Figure 3 is a structural schematic diagram of the upper slider of the hydraulic press with a buffer device according to an embodiment of the present utility model at the highest position;

[0020] Figure 4 is a structural schematic diagram of the hydraulic press with a buffer device according to an embodiment of the present utility model when the screw rod just touches the buffer cylinder during the downward movement;

[0021] Figure 5 is a three-dimensional structural schematic diagram of the buffer screw rod mechanism according to an embodiment of the present utility model;

[0022] Figure 6 is a top view structural schematic diagram of the buffer screw rod mechanism according to an embodiment of the present utility model;

[0023] Figure 7 is a front view structural schematic diagram of the buffer screw rod mechanism according to an embodiment of the present utility model;

[0024] Figure 8 It is a schematic cross-sectional structure diagram of the buffer screw rod mechanism in the embodiment of the present utility model.

[0025] Explanation of the reference numerals: body 1, upper slider 11, lower base 12, power hydraulic station 13, main oil cylinder 14, buffer cylinder 2, buffer screw rod mechanism 3, support body 31, buffer screw rod 32, limiting mechanism 33, driven rotating gear 34, wear-resistant gasket 35, keyway 331, limiting key 332, servo motor adjustment mechanism 4, servo motor 41, driving gear 42, speed reducer 43, driving shaft 44, limit block 45, upper limit induction switch 46, lower limit induction switch 47. Detailed implementation manners

[0026] The present utility model will be further described below in conjunction with the drawings and detailed implementation manners.

[0027] Refer to Figure 1-8 As shown, a hydraulic press with a buffer device includes an upper slider 11 and a lower base 12. The upper slider 11 moves up and down relative to the lower base 12. The lower base 12 is provided with a buffer cylinder 2 for buffering the upper slider 11, and the upper slider 11 vertically opposite to the buffer cylinder 2 is provided with a buffer screw rod mechanism 3 with adjustable lifting.

[0028] The buffer screw rod mechanism 3 is fixedly connected to the upper slider 11. The buffer screw rod mechanism 3 includes a support body 31, a buffer screw rod 32 arranged in the support body 31, and a servo motor adjustment mechanism 4. The buffer screw rod 32 is vertically positioned in the support body 31, and its lower end surface is vertically opposite to the buffer cylinder 2. The servo motor adjustment mechanism 4 is rotationally connected to the buffer screw rod 32.

[0029] The buffer screw rod mechanism 3 further includes a limiting mechanism 33 for limiting rotation.

[0030] The buffer screw rod mechanism 3 includes a driven rotating gear 34, which has an internal thread on its inner circle and driven teeth on its outer circle. The buffer screw rod 32 is screwed into the internal thread of the driven rotating gear 34. The output shaft of the servo motor 41 of the servo motor adjustment mechanism 4 is provided with a driving gear 42, and the driving gear 42 is connected to the driven teeth of the driven rotating gear 34.

[0031] The support body 31 is arranged on the upper slider 11. A wear-resistant gasket 35 is provided on the support body 31, and the driven rotating gear 34 is rotatably arranged in the wear-resistant gasket 35.

[0032] The limiting mechanism 33 includes a keyway 331 arranged along the axial direction of the buffer screw rod 31 and a limiting key 332 fixed on the support body 31. The limiting key 332 extends into and is positioned in the keyway 331.

[0033] The servo motor 41 is connected to a speed reducer 43, and the speed reducer 43 is connected to the driving gear 41 through a driving shaft 44.

[0034] A limit block 45 is provided at the top of the buffer lead screw 32.

[0035] An upper limit induction switch 46 is provided on the limit block 45. A lower limit induction switch 47 is provided below the upper limit induction switch 46. The upper and lower limit induction switches 46 and 47 respectively correspond to the upper and lower ends of the buffer lead screw 32.

[0036] A power hydraulic station 13 is provided at the top of the body 1 of the hydraulic press. A main oil cylinder 14 for driving the upper slider 11 to move up and down is provided on the body 1.

[0037] In the specific implementation of the present utility model, an upper mold is provided on the upper slider 11, a lower mold is provided on the lower base 12, buffer cylinders 2 are symmetrically provided on the side of the lower base 12, and a lead screw buffer mechanism 3 is symmetrically provided on the side of the upper slider 11. The lead screw buffer mechanism 3 is vertically opposite to the buffer cylinder 2. The power hydraulic station 13 provides hydraulic power to drive the main oil cylinder 14 to act. The main oil cylinder 14 drives the upper slider 11 to drive the upper mold to move downward, so that the upper mold and the lower mold are closed. The lead screw buffer mechanism 3 adjusts the position where the buffer lead screw 32 extends downward according to the stroke of closing the mold of different molds. Specifically, the servo motor 41 drives the reducer 43. The reducer 43 drives the driving shaft 44 to drive the driving gear 41 to rotate through the driving shaft 44. The driving gear 41 drives the driven rotating gear 34 to rotate. The driven rotating gear 34 is threadedly connected to the buffer lead screw 34 and, in combination with the limiting mechanism 33, drives the buffer lead screw 34 to move up and down in the vertical direction, so as to realize the lifting position of the lower end surface of the buffer lead screw 32. During the mold closing process, the lower end surface of the buffer lead screw 34 abuts against the buffer cylinder 2 to achieve buffering. Among them, the upper limit induction switch 46 and the lower limit induction switch 47 respectively detect the highest position and the lowest position of the buffer lead screw 34. Through the precise control of the servo motor 41, the buffer lead screw 34 can be precisely adjusted to adapt to different molds, eliminating the need for manual operation to replace shims of different sizes, greatly improving the production efficiency.

[0038] To sum up, the present utility model has been made into an actual sample as described in the specification and the drawings and has been tested many times. From the test results, it can be proved that the present utility model can achieve its intended purpose, and its practical value is beyond doubt. The above embodiments are only used to illustrate the present utility model for convenience, and do not impose any form of limitation on the present utility model. Any person with ordinary knowledge in the technical field, without departing from the technical features of the present utility model, makes local changes or modified equivalent embodiments using the technical content disclosed in the present utility model, and without departing from the technical feature content of the present utility model, still belongs to the scope of the technical features of the present utility model.

Claims

1. A hydraulic press with a buffer device, comprising an upper slide block (11) and a lower base (12). The upper slide block (11) moves up and down relative to the lower base (12), and the lower base (12) is provided with a buffer cylinder (2) for buffering the upper slide block (11), characterized in that, An upper slider (11) vertically opposite to the buffer cylinder (2) is provided with a buffer lead screw mechanism (3) with adjustable lifting.

2. The hydraulic press with a buffer device according to claim 1, characterized in that, The buffer lead screw mechanism (3) is fixedly connected to the upper slider (11). The buffer lead screw mechanism (3) includes a support body (31), a buffer lead screw (32) arranged in the support body (31), and a servo motor adjustment mechanism (4). The buffer lead screw (32) is vertically positioned in the support body (31), and its lower end face is vertically opposite to the buffer cylinder (2). The servo motor adjustment mechanism (4) is rotationally connected to the buffer lead screw (32).

3. The hydraulic press with a buffer device according to claim 1 or 2, characterized in that, The buffer lead screw mechanism (3) further includes a limiting mechanism (33) for limiting rotation.

4. The hydraulic press with a buffer device according to claim 2, wherein The buffer lead screw mechanism (3) includes a driven rotating gear (34) with an internal thread on its inner circle and driven teeth on its outer circle. The buffer lead screw (32) is screwed into the internal thread of the driven rotating gear (34). The output shaft of the servo motor (41) of the servo motor adjustment mechanism (4) is provided with a driving gear (42), and the driving gear (42) is connected to the driven teeth of the driven rotating gear (34).

5. The hydraulic press with a buffer device according to claim 3, characterized in that, The support body (31) is arranged on the upper slider (11). A wear-resistant gasket (35) is provided on the support body (31), and the driven rotating gear (34) is rotatably arranged in the wear-resistant gasket (35).

6. The hydraulic press with a buffer device according to claim 3, characterized in that, The limiting mechanism (33) includes a keyway (331) arranged along the axial direction of the buffer lead screw (32) and a limiting key (332) fixed on the support body (31). The limiting key (332) extends into and is positioned in the keyway (331).

7. The hydraulic press with a buffer device according to claim 4, wherein The servo motor (41) is connected with a speed reducer (43), and the speed reducer (43) is connected to the driving gear (42) through a driving shaft (44).

8. The hydraulic press with a buffer device according to claim 5, characterized in that, A limit block (45) is provided at the top end of the buffer lead screw (32).

9. The hydraulic press with a buffer device according to claim 8, characterized in that, An upper limit induction switch (46) is provided on the limit block (45). A lower limit induction switch (47) is provided below the upper limit induction switch (46). The upper and lower limit induction switches (46, 47) respectively correspond to the upper and lower ends of the buffer lead screw (32).

10. The hydraulic press with a buffer device according to claim 8, characterized in that, A power hydraulic station (13) is provided at the top of the body (1) of the hydraulic press. A main oil cylinder (14) for driving the upper slider (11) to move up and down is provided on the body (1).

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