A wedge-type clamping device and a large-tonnage semi-solid metal die-casting machine

Abstract

The present invention discloses a wedge-type mold locking device, including a mounting frame, a fixed mold plate, a movable mold plate, a locking mechanism and a mold closing drive mechanism; the fixed mold plate is fixed to the front end of the mounting frame, the movable mold plate is slidably arranged in the middle of the mounting frame, and a receiving space is formed between the fixed mold plate and the movable mold plate; the locking mechanism includes a first driving device, a first inclined plate and a wedge plate, the first driving device is vertically fixed to the mounting frame, the first inclined plate is fixed to the side of the movable mold plate, and the top of the wedge plate is fixedly connected to the output shaft of the first driving device; the mold closing drive mechanism includes a second driving device, the output shaft of the second driving device is fixedly connected to the movable mold plate, and the output shaft of the second driving device and the wedge plate do not interfere with each other. The present invention also discloses a large-tonnage semi-solid metal die-casting machine. The wedge-type mold locking device of the present invention can provide a large-tonnage mold locking force, and has the advantages of stable operation, convenient operation, compact structure, small space occupation and low energy consumption.

Description

Technical Field

[0001] The invention relates to the field of semi-solid die-casting production, and in particular to a wedge-type clamping device and a large-tonnage semi-solid metal die-casting machine. Background Art

[0002] Semi-solid squeeze casting is a method of forming by combining semi-solid rheological pulping, thixotropic pulping and squeeze casting, and utilizing the properties of non-dendritic semi-solid slurry with coexistence of solid and liquid. The main idea of ​​this technology is to pour the qualified alloy liquid into the pulping chamber at a temperature higher than the liquidus line to prepare a slurry with good semi-solid properties for pouring. This semi-solid slurry fills the mold cavity under the action of gravity, and then the extrusion mechanism is used to apply pressure to the semi-solid slurry in the mold cavity and perform hot die forging treatment. The pressure is maintained for a period of time, and after it is completely solidified, the pressure is released and the mold is opened, supplemented by necessary heat treatment, and finally a near-net-shaped part with dense interior and good performance is obtained.

[0003] In the prior art, the invention patent with Chinese patent application number CN201810379558.3 ​​discloses a fully vertical semi-solid die-casting machine with an automatic feeding device, including an overall frame, an injection station, an upper slider, a lower slider, a locking mechanism, a feeding mechanism, an injection chamber assembly, an injection cylinder, and a mold. The injection station is arranged in the middle of the overall frame, the upper slider and the lower slider are relatively installed on the overall frame, the locking mechanism is respectively connected to the lower slider and the overall frame, the feeding mechanism is arranged on the side of the overall frame, the injection chamber assembly is fixed on the feeding mechanism, the injection cylinder is installed in the bottom center of the overall frame, the injection chamber assembly is cooperatively connected with the injection cylinder, and the mold is installed on the injection station; although the semi-solid die-casting machine can effectively reduce the horizontal liquid level of the molten metal in the injection chamber, the injection chamber assembly is above the horizontal liquid level. The contact area with the air can reduce the probability of metal being oxidized and contaminated, but there are still the following problems: its locking mechanism includes a locking cylinder, an elbow locking device, and a gear automatic synchronous adjustment nut. The locking cylinder is installed above the upper beam, and the two ends of the elbow locking device are respectively connected to the upper beam and the upper slider, and the locking cylinder is connected to the elbow locking device through a gear automatic synchronous adjustment nut; when the raw material is injected into the mold cavity at high pressure, a mold-supporting force will be generated, so the locking unit must provide sufficient "locking force" to prevent the mold from being opened. The locking mechanism provides a vertical force through a locking cylinder for locking, which has the disadvantage of unstable locking force, and when the locking force is large, a large-tonnage locking cylinder is required, which has the disadvantages of complex structure, large volume and high energy consumption. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, one of the objects of the present invention is to provide a wedge-type clamping device which can provide a large-tonnage clamping force and has the advantages of stable operation, convenient operation, compact structure, small space occupation and low energy consumption.

[0005] A second object of the present invention is to provide a large-tonnage semi-solid metal die-casting machine including the above-mentioned wedge-type clamping device.

[0006] One of the purposes of the present invention is achieved by the following technical solution:

[0007] A wedge-type mold locking device, characterized in that it comprises a mounting frame, a fixed mold plate, a movable mold plate, a locking mechanism and a mold clamping drive mechanism; the length direction of the mounting frame is defined as a horizontal direction, and the height direction of the mounting frame is defined as a vertical direction;

[0008] The fixed template is fixedly mounted on the front end of the mounting frame, the movable template is slidably arranged in the middle of the mounting frame, and an accommodating space is formed between the fixed template and the movable template;

[0009] The locking mechanism comprises a first driving device, a first inclined plate, a second inclined plate, and a wedge plate, wherein the first driving device is vertically fixedly mounted on the mounting frame, the first inclined plate is fixedly mounted on a side surface of the movable plate away from the fixed plate, the second inclined plate is fixedly mounted on a side surface of the wedge plate close to the movable plate, and the top of the wedge plate is fixedly connected to an output shaft of the first driving device; the inclined surface of the first inclined plate can be slidably matched with the inclined surface of the second inclined plate; the first driving device drives the wedge plate to descend or ascend in a vertical direction, so that the inclined surface of the first inclined plate and the inclined surface of the second inclined plate are locked or separated;

[0010] The mold closing drive mechanism includes a second drive device fixedly installed at the rear end of the mounting frame, the output shaft of the second drive device is fixedly connected to the movable template, and the output shaft of the second drive device and the wedge plate do not interfere with each other; the second drive device drives the movable template to approach or move away from the fixed template in the horizontal direction, thereby realizing mold closing or mold separation.

[0011] Further, the cooperation mode between the wedge plate and the second driving device includes any one of the following two modes:

[0012] Mode 1: The projections of the wedge plate and the output shaft of the second driving device on the horizontal plane do not overlap; there are two second driving devices, which are fixedly installed on both sides of the wedge plate respectively;

[0013] Method 2: A notch is provided at the bottom of the wedge plate, and the output shaft of the second driving device passes through the notch of the wedge plate and is fixedly connected to the movable template.

[0014] Furthermore, the angle between the inclined surface of the first inclined plate and the vertical plane is α, and the angle between the inclined surface of the second inclined plate and the vertical plane is β, wherein α=β, and α is 3°-10°.

[0015] More preferably, the angle α is 5°.

[0016] Furthermore, the wedge-type locking device also includes a mold clamping cylinder seat fixedly installed on the rear end or side of the mounting frame, and the second driving device is fixedly installed on the mold clamping cylinder seat; the wedge-type locking device also includes a Coring column, one end of which is fixedly connected to the fixed template, and the other end of which is fixedly connected to the mold clamping cylinder seat; the movable template can be slidably sleeved on the Coring column.

[0017] Furthermore, a guide rail is provided on the installation frame, and a sliding block is provided at the bottom of the movable template, and the sliding block is slidably matched with the guide rail.

[0018] Furthermore, the first inclined plate and the movable template are split structures that are detachably connected, and the second inclined plate and the wedge plate are split structures that are detachably connected.

[0019] Furthermore, the first driving device is a mold locking hydraulic cylinder, and the second driving device is a mold closing hydraulic cylinder.

[0020] The second object of the present invention is achieved by adopting the following technical solution:

[0021] A large-tonnage semi-solid metal die-casting machine comprises a semi-solid metal mold and an injection mechanism, characterized in that it also comprises the wedge-type locking device described in one of the purposes of the present invention; the semi-solid metal mold is arranged in the accommodating space of the wedge-type locking device, the injection mechanism is arranged below the mounting frame, and the injection port of the injection mechanism is connected to the feed port of the semi-solid metal mold.

[0022] Furthermore, the mounting frame is also provided with an ejection mechanism for ejecting the material in the cavity of the semi-solid metal mold.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The wedge-type mold locking device of the present invention comprises a mounting frame, a fixed mold plate, a movable mold plate, a locking mechanism and a mold closing driving mechanism; the first driving device drives the wedge plate to descend or ascend in the vertical direction, so that the inclined surface of the first inclined plate and the inclined surface of the wedge plate are locked or separated; the second driving device drives the movable mold plate to approach or move away from the fixed mold plate in the horizontal direction, so as to close or separate the molds; due to the existence of the wedge plate, the vertical force provided by the first driving device can be converted into a horizontal force, and combined with the horizontal force provided by the second driving device to form a mold locking force, while reducing the tonnage of the mold closing hydraulic cylinder, it can also provide a sufficiently large mold locking force. Therefore, the wedge-type mold locking device of the present invention can provide a large tonnage (more than 10,000 tons) of mold locking force, and has the advantages of stable operation, convenient operation, compact structure, small space occupation and low energy consumption (energy saving of more than 50%).

[0025] 2. The large-tonnage semi-solid metal die-casting machine of the present invention comprises a semi-solid metal mold, an injection mechanism, and a wedge-type clamping device; the operation process is as follows: first, the first driving device is controlled to drive the wedge plate to rise in the vertical direction, so that the inclined surface of the first inclined plate is separated from the inclined surface of the wedge plate, and the second driving device is controlled to drive the movable platen to move away from the fixed platen in the horizontal direction to achieve mold separation; then the semi-solid metal mold is installed in the accommodating space of the wedge-type clamping device, and the second driving device is controlled to drive the movable platen to approach the fixed platen in the horizontal direction to achieve mold closing; the first driving device is controlled to drive the wedge plate to descend in the vertical direction, so that the inclined surface of the first inclined plate is locked with the inclined surface of the wedge plate; finally, the semi-solid metal is injected through the injection mechanism. Due to the existence of the wedge plate, the vertical force provided by the first driving device can be converted into a horizontal force, and combined with the horizontal force provided by the second driving device to form a clamping force, which can provide a sufficiently large clamping force while reducing the tonnage of the clamping hydraulic cylinder. Therefore, the large-tonnage semi-solid metal die-casting machine of the present invention can provide a large-tonnage (more than 10,000 tons) clamping force, and has the advantages of stable operation, convenient operation, compact structure, small space occupation and low energy consumption (energy saving of more than 50%).

[0026] 3. The first inclined plate and the movable template of the present invention are split structures that can be detachably connected, and the second inclined plate and the wedge plate are split structures that can be detachably connected. The accommodating space formed between the fixed template and the movable template and the clamping force of the wedge plate can be adjusted by adjusting the thickness and angle of the first inclined plate and the second inclined plate. After wear during use, the cost of equipment wear parts can be reduced by only replacing the first inclined plate and the second inclined plate.

[0027] 4. The projections of the wedge plate and the output shaft of the second driving device on the horizontal plane do not overlap; there are two second driving devices, which are fixedly installed on both sides of the wedge plate. This design can ensure that the output shaft of the second driving device and the wedge plate do not interfere with each other, and at the same time make the force on the movable plate uniform and the overall structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the wedge-type clamping device of Example 1;

[0029] Figure 2 This is a schematic structural diagram of a large-tonnage semi-solid metal die-casting machine according to Example 2.

[0030] In the figure: 10, mounting frame; 20, fixed template; 30, movable template; 41, first driving device; 42, first inclined plate; 43, wedge plate; 44, second inclined plate; 51, second driving device; 60, corinth column; 70, semi-solid metal mold; 80, injection mechanism; 90, ejection mechanism.

[0031] Specific embodiment

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form a new embodiment. Unless otherwise specified, the materials and equipment used in this embodiment can be purchased from the market.

[0033] Embodiment 1:

[0034] Reference Figure 1 A wedge-type mold locking device comprises a mounting frame 10, a fixed mold plate 20, a movable mold plate 30, a locking mechanism and a mold clamping drive mechanism; the length direction of the mounting frame is defined as a horizontal direction, and the height direction of the mounting frame is defined as a vertical direction;

[0035] The installation frame 10 includes a base, columns and beams.

[0036] The fixed template 20 is fixedly mounted on the front end of the base of the mounting frame 10, and the movable template 30 is slidably disposed in the middle of the base of the mounting frame 10, and an accommodating space is formed between the fixed template 20 and the movable template 30;

[0037] The locking mechanism comprises a first driving device 41, a first inclined plate 42, a wedge plate 43, and a second inclined plate 44. The first driving device 41 is vertically fixedly mounted on the crossbeam of the mounting frame 10. The first inclined plate 42 is fixedly mounted on the side of the movable plate 30 away from the fixed plate 20. The second inclined plate 44 is fixedly mounted on the side of the wedge plate 43 close to the movable plate 30. The top of the wedge plate 43 is fixedly connected to the output shaft of the first driving device 41. The inclined surface of the first inclined plate 42 can be slidably matched with the inclined surface of the second inclined plate 44. The first driving device 41 drives the wedge plate 43 to descend or ascend in the vertical direction, so that the inclined surface of the first inclined plate 42 and the inclined surface of the second inclined plate 44 are locked or separated.

[0038] The mold closing drive mechanism includes a second drive device 51 horizontally fixedly installed on the rear end of the base of the mounting frame 10, the output shaft of the second drive device 51 is fixedly connected to the movable template 30, and the output shaft of the second drive device 51 and the wedge plate 43 do not interfere with each other; the second drive device 51 drives the movable template 30 to approach or move away from the fixed template 20 in the horizontal direction, thereby realizing mold closing or mold separation.

[0039] As a preferred embodiment, the projections of the wedge plate and the output shaft of the second driving device on the horizontal plane do not overlap; there are two second driving devices, which are respectively fixedly mounted on both sides of the wedge plate 43. This design can ensure that the output shaft of the second driving device 51 and the wedge plate 43 do not interfere with each other, and at the same time make the force of the movable plate 30 uniform, and the overall structure is more compact.

[0040] As a preferred embodiment, the angle between the inclined surface of the first inclined plate 42 and the vertical surface is α, and the angle between the inclined surface of the second inclined plate 44 and the vertical surface is β, wherein α=β, and α is 5°. This design ensures that the vertical force provided by the first drive device 41 can be converted into the horizontal clamping force as much as possible, while reducing the power loss, equipment volume and cost required by the first drive device 41.

[0041] As a preferred embodiment, the wedge-type mold locking device further includes a mold clamping cylinder seat fixedly mounted on the rear end or side of the base of the mounting frame 10, and the second driving device 51 is fixedly mounted on the mold clamping cylinder seat; the wedge-type mold locking device further includes four Corinthian columns 60, one end of which is fixedly connected to the fixed mold plate 20, and the other end of which is fixedly connected to the mold clamping cylinder seat; the movable mold plate 30 is slidably sleeved on the Corinthian columns 60. This design can balance the sliding of the movable mold plate 30 and withstand the tension caused by mold clamping, and play a better guiding role.

[0042] As a preferred embodiment, a guide rail is further provided on the mounting frame 10, and a slider is provided at the bottom of the movable template 30, and the slider is slidably connected with the guide rail. This design can guide the movable template 30 to slide better and reduce friction.

[0043] As a preferred embodiment, the first inclined plate 42 and the movable template 30 are a split structure that can be detachably connected, and the second inclined plate 44 and the wedge plate 43 are a split structure that can be detachably connected; by adjusting the thickness and angle of the first inclined plate and the second inclined plate, the accommodating space formed between the fixed template and the movable template and the wedge plate clamping force can be adjusted, and the cost of equipment wear parts can be reduced by replacing only the first inclined plate after wear during use.

[0044] As a preferred embodiment, the first driving device 41 is a mold locking hydraulic cylinder, and the second driving device 51 is a mold closing hydraulic cylinder.

[0045] Embodiment 2:

[0046] Reference Figure 2 This embodiment provides a large-tonnage semi-solid metal die-casting machine, comprising a semi-solid metal mold 70 and an injection mechanism 80, and also comprising the wedge-type clamping device described in Embodiment 1; the semi-solid metal mold 70 is arranged in the accommodation space of the wedge-type clamping device, the injection mechanism 80 is arranged below the mounting frame 10, and the injection port of the injection mechanism 80 is connected to the feed port of the semi-solid metal mold 70. The mounting frame 10 is also provided with an ejection mechanism 90 for ejecting the material in the cavity of the semi-solid metal mold 70.

[0047] The semi-solid metal mold 70, injection mechanism 80, and ejection mechanism 90 in this embodiment are all commercially available products; the injection mechanism 80 can also adopt a suspended design, in which the barrel and the slurry rise at the same time and maintain an unchanged relative position, thereby avoiding the situation in which the barrel of a traditional injection mechanism rises alone and the slurry slides down and contacts with the cold barrel wall, affecting the quality of die-casting.

[0048] Working principle: First, the first driving device 41 is controlled to drive the wedge plate 43 to rise in the vertical direction, so that the inclined surface of the first inclined plate 42 and the inclined surface of the second inclined plate 44 are separated, and the second driving device 51 is controlled to drive the movable plate 30 to move away from the fixed plate 20 in the horizontal direction to achieve mold separation; then the semi-solid metal mold 70 is installed in the accommodating space of the wedge-type clamping device, and the second driving device 51 is controlled to drive the movable plate 30 to move close to the fixed plate 20 in the horizontal direction to achieve mold closing; the first driving device 41 is controlled to drive the wedge plate 43 to descend in the vertical direction, so that the inclined surface of the first inclined plate 42 and the inclined surface of the second inclined plate 44 are locked; finally, the semi-solid metal is injected through the injection mechanism 80. Due to the existence of the wedge plate 43, the vertical force provided by the first driving device 41 can be converted into a horizontal force, and combined with the horizontal force provided by the second driving device 51 to form a clamping force, which can reduce the tonnage of the clamping hydraulic cylinder while providing a sufficiently large clamping force.

[0049] The rest is the same as Example 1.

[0050] Embodiment 3:

[0051] The characteristic of this embodiment is that the angle between the inclined surface of the first inclined plate and the vertical surface is α, and the angle between the inclined surface of the second inclined plate and the vertical surface is β, wherein α=β, and α is 3°.

[0052] The rest is the same as Example 1.

[0053] Embodiment 4:

[0054] The characteristic of this embodiment is that the angle between the inclined surface of the first inclined plate and the vertical surface is α, and the angle between the inclined surface of the second inclined plate and the vertical surface is β, wherein α=β, and α is 10°.

[0055] The rest is the same as Example 1.

[0056] Embodiment 5:

[0057] The characteristic of this embodiment is that a notch is provided at the bottom of the wedge plate, and the output shaft of the second driving device passes through the notch of the wedge plate and is fixedly connected to the movable platen. Such a design can reduce the occupied space.

[0058] The rest is the same as Example 1.

[0059] Other embodiments:

[0060] The angle between the inclined surface of the first inclined plate and the vertical surface is α, and the angle between the inclined surface of the second inclined plate and the vertical surface is β, wherein α=β, and α is 4°, 6°, 7°, 8°, 9°, 20°, 30° or other acute angles. The number of the Corinthian columns can be adjusted according to actual needs.

[0061] The above implementation modes 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 wedge-type clamping device, characterized in that: It includes a mounting frame, a fixed platen, a movable platen, a locking mechanism and a clamping drive mechanism; the length direction of the mounting frame is defined as a horizontal direction, and the height direction of the mounting frame is defined as a vertical direction, and the mounting frame includes a base and a crossbeam; The fixed template is fixedly mounted on the front end of the base of the mounting frame, the movable template is slidably arranged in the middle of the base of the mounting frame, and an accommodating space is formed between the fixed template and the movable template; The locking mechanism comprises a first driving device, a first inclined plate, a second inclined plate, and a wedge plate, wherein the first driving device is vertically fixedly mounted on the crossbeam of the mounting frame, the first inclined plate is fixedly mounted on the side of the movable template away from the fixed template, the second inclined plate is fixedly mounted on the side of the wedge plate close to the movable template, and the top of the wedge plate is fixedly connected to the output shaft of the first driving device; the inclined surface of the first inclined plate can be slidably matched with the inclined surface of the second inclined plate; the first driving device drives the wedge plate to descend or ascend in the vertical direction, so that the inclined surface of the first inclined plate and the inclined surface of the second inclined plate are locked or separated; The mold clamping drive mechanism includes a second drive device fixedly mounted on the rear end of the base of the mounting frame, the output shaft of the second drive device is fixedly connected to the movable plate, and the output shaft of the second drive device does not interfere with the wedge plate; The second driving device drives the movable platen to move closer to or away from the fixed platen in the horizontal direction, thereby achieving mold closing or mold separation; The projections of the wedge plate and the output shaft of the second driving device on the horizontal plane do not overlap; there are two second driving devices, which are respectively fixedly installed on both sides of the wedge plate; a notch is provided at the bottom of the wedge plate, and the output shaft of the second driving device passes through the notch of the wedge plate and is fixedly connected to the movable platen; The angle between the inclined surface of the first inclined plate and the vertical surface is α, and the angle between the inclined surface of the second inclined plate and the vertical surface is β, wherein α=β, and α is 3°-10°; The first inclined plate and the movable platen are split structures that are detachably connected, and the second inclined plate and the wedge plate are split structures that are detachably connected; The wedge-type mold locking device further comprises a mold clamping cylinder seat fixedly mounted on the rear end or side of the base of the mounting frame, and the second driving device is fixedly mounted on the mold clamping cylinder seat; the wedge-type mold locking device further comprises a Corinthian column, one end of which is fixedly connected to the fixed mold plate, and the other end of which is fixedly connected to the mold clamping cylinder seat; the movable mold plate is slidably sleeved on the Corinthian column; The installation frame is also provided with a guide rail, and the bottom of the movable template is provided with a sliding block, and the sliding block is slidably matched with the guide rail.

2. The wedge-type clamping device according to claim 1, characterized in that: α is 5°.

3. The wedge-type clamping device according to claim 1, characterized in that: The first driving device is a mold locking hydraulic cylinder, and the second driving device is a mold closing hydraulic cylinder.

4. A large-tonnage semi-solid metal die-casting machine, comprising a semi-solid metal mold and an injection mechanism, characterized in that: It also includes a wedge-type locking device as described in any one of claims 1 to 3; the semi-solid metal mold is arranged in the accommodating space of the wedge-type locking device, the injection mechanism is arranged below the mounting frame, and the injection port of the injection mechanism is connected to the feed port of the semi-solid metal mold.

5. The large-tonnage semi-solid metal die-casting machine according to claim 4, characterized in that: The mounting frame is also provided with an ejection mechanism for ejecting the material in the cavity of the semi-solid metal mold.

Images