Welded press

Abstract

The utility model discloses a welding type press which comprises a machine frame, an oil cylinder assembly arranged on the machine frame, a workpiece positioning seat and an oil pump assembly for injecting oil into the oil cylinder assembly, and the oil pump assembly comprises a bottom plate, an oil storage barrel and a pump body. An oil hole, a first one-way oil outlet path, a second one-way oil outlet path and an oil return path are formed in the bottom plate, the first one-way oil outlet path, the second one-way oil outlet path and the oil return path are communicated with the oil hole, the oil hole is connected with the oil cylinder assembly, and the second one-way oil outlet path is further communicated with an oil drainage path with an opening and closing function. The pump body is arranged on the upper surface of the base and is provided with an outer oil pumping cavity and an inner oil pumping cavity, the outer oil pumping cavity is communicated with an oil inlet of the first one-way oil outlet path, and the inner oil pumping cavity is communicated with an oil inlet of the second one-way oil outlet path; the oil storage cylinder is arranged on the lower surface of the bottom plate, communicates with the inner oil pumping cavity and the outer oil pumping cavity and communicates with the oil return section of the oil drainage oil way and the oil return section of the oil return oil way. According to the utility model, the quantity of oil injected into the oil cylinder assembly can be adjusted, the use flexibility is obviously improved, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of presses, in particular to a welding press. Background Art

[0002] The press is the main equipment for compression molding, which mainly includes a frame, a cylinder installed on the frame, a workpiece positioning seat, and an oil pump assembly for injecting oil into the cylinder. When working, the oil pump assembly injects oil into the cylinder, so that the piston rod of the cylinder is pressed down, and a certain pressure is applied to the metal parts on the workpiece positioning seat to cause plastic deformation. It is easy to use and has a wide range of uses. It is widely used in shaping, bending, forming, riveting and other processes.

[0003] In the prior art, the amount of oil injected into the oil cylinder by the oil pump assembly cannot be adjusted, that is, after the oil pump button in the oil pump assembly is pressed once, the displacement of the cylinder piston rod cannot be adjusted, resulting in low flexibility of use and inability to adapt to the work needs of the operator, so further improvement is needed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a welding press, which can adjust the amount of oil injected into the oil cylinder, significantly improves the flexibility of use, and facilitates operation.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A welding press comprises a frame, a cylinder assembly arranged on the frame, a workpiece positioning seat and an oil pump assembly for injecting oil into the cylinder assembly, wherein the oil pump assembly comprises a bottom plate, an oil storage cylinder and a pump body;

[0007] The bottom plate is provided with an oil hole and a first one-way oil outlet oil passage, a second one-way oil outlet oil passage and an oil return oil passage connected to the oil hole, wherein the oil hole is connected to the oil cylinder assembly through a first pipeline, and the second one-way oil outlet oil passage is also connected to an oil drain oil passage with an opening and closing function;

[0008] The pump body is arranged on the upper surface of the base and has an outer pump oil chamber and an inner pump oil chamber, the outer pump oil chamber is communicated with the oil inlet of the first one-way oil outlet oil passage, and the inner pump oil chamber is communicated with the oil inlet of the second one-way oil outlet oil passage;

[0009] The oil storage cylinder is arranged on the lower surface of the bottom plate, and is communicated with the inner pump oil cavity and the outer pump oil cavity, and is also communicated with the oil return section of the oil leakage oil circuit and the oil return section of the oil return oil circuit.

[0010] Preferably, the first one-way oil outlet passage and the second one-way oil outlet passage both include an oil outlet channel, an oil outlet ball, a spring and an oil outlet bolt;

[0011] The oil outlet channel is opened in the bottom plate and is divided into an oil inlet section and an oil outlet section, and the oil inlet section and the oil outlet section are connected by a bell mouth structure;

[0012] The oil outlet bolt, the spring and the oil outlet ball are arranged in the oil outlet section, and the oil outlet bolt pushes the oil outlet ball onto the bell mouth through the spring.

[0013] Preferably, the oil leakage circuit and the oil return circuit both include an oil return channel and a channel opening and closing assembly;

[0014] The oil return oil circuit is opened in the bottom plate and is divided into an oil inlet section and an oil return section, and the oil inlet section and the oil return section are connected by a bell mouth structure;

[0015] The channel opening and closing assembly is arranged in the oil return section and comprises an oil return screw and an oil return ball. The oil return screw is threadably matched with the oil return section and can push the oil return ball onto the bell mouth.

[0016] Preferably, the pump body includes a pump barrel and a pump core, the pump barrel has an inner oil chamber and an outer oil chamber, the pump core includes an inner core and an outer core, the inner pump oil chamber is formed by the inner core and the inner oil chamber, and the outer pump oil chamber is formed by the outer core and the outer oil chamber.

[0017] Preferably, the first pipeline includes an oil pipe, a tee and a pressure gauge, the tee is fixed on the frame, the oil hole is connected to one of the pipe ends of the tee through the oil pipe, the cylinder assembly is connected to the other pipe end of the tee through the oil pipe, and the pressure gauge is connected to the remaining pipe end of the tee.

[0018] Preferably, a plurality of positioning holes arranged vertically are provided on both sides of the bracket, positioning pins are inserted into the positioning holes, and the workpiece positioning seat is provided on the positioning pins.

[0019] The advantages of the utility model are as follows: when the oil leakage circuit is in a closed state, the hydraulic oil in the first one-way oil outlet circuit and the second one-way oil outlet circuit are both pumped to the oil hole, and then pass from the oil hole to the cylinder assembly, driving the piston rod of the cylinder to move; when the oil leakage circuit is in an open state, the hydraulic oil in the second one-way oil outlet circuit will flow back into the oil storage barrel. Therefore, only the hydraulic oil in the first one-way oil outlet circuit is pumped into the cylinder assembly, driving the piston rod of the cylinder assembly to move. Therefore, the utility model can control the amount of hydraulic oil pumped out by the oil pump assembly when the button is pressed once, thereby controlling the moving speed and downward pressure of the piston rod to meet the various usage needs of the operator, and has the characteristics of high flexibility in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a welding press provided in this embodiment;

[0021] Figure 2 A schematic diagram of the oil circuit in the base plate provided in this embodiment;

[0022] Figure 3 This is a schematic diagram of the pump body provided in this embodiment. DETAILED DESCRIPTION

[0023] Combination Figures 1 to 3 The welding press of the utility model is further described.

[0024] A welding press comprises a frame 1, a cylinder assembly 2 arranged on the frame 1, a workpiece positioning seat 3 and an oil pump assembly 4 for injecting oil into the cylinder assembly 2.

[0025] The oil cylinder assembly 2 is fixed on the top of the frame 1 in an inverted state, and a plunger is installed on the piston rod of the oil cylinder assembly 2 for extruding a metal workpiece.

[0026] A plurality of positioning holes 12 arranged vertically are provided on both the left and right sides of the bracket, and positioning pins 11 are inserted into the positioning holes 12, and the workpiece positioning seat 3 is built on the positioning pins 11. Specifically, the positioning pins 11 are inserted into the positioning holes 12 in a forward and backward extending state, and the front and rear ends of the positioning pins 11 are respectively exposed outside the frame 1. The workpiece positioning seat 3 includes a base frame 32 and a positioning frame 31, and the base frame 32 includes a front side plate 322 and a rear side plate 321. The left and right sides of the front side plate 322 are installed on the front end positions of the two positioning pins 11 through through holes, and are fastened by spring buckles 33. The left and right sides of the rear side plate 321 are also installed on the rear end positions of the two positioning pins 11 through through holes, and are fastened by spring buckles 33. The positioning frame 31 is welded on the base frame 32 for positioning the metal workpiece. Under this structure, when the positioning pins 11 are inserted into the positioning holes 12 at different heights, the height of the positioning frame 31 can be adjusted to adapt to the positioning of different products at different heights.

[0027] The oil pump assembly 4 is disposed on the right side of the frame 1 , and includes a bottom plate 41 , an oil storage cylinder 43 and a pump body 42 .

[0028] The bottom plate 41 is mounted on the right side wall of the frame 1 by bolts, and has an oil hole 9 and a first one-way oil outlet passage 5, a second one-way oil outlet passage 6 and an oil return passage 8 connected to the oil hole 9. The oil hole 9 is an upper end open and lower end closed structure, the upper end of the oil hole 9 is connected to the cylinder assembly 2 through the first pipeline 6, and the second one-way oil outlet passage 6 is also connected to an oil drain passage 7 with an opening and closing function.

[0029] like Figure 2As shown in Figure 3, the pump body 42 is arranged on the upper surface of the base and has an outer pump oil chamber 427 and an inner pump oil chamber 428. The outer pump oil chamber 427 is connected to the oil inlet 5121 of the first one-way oil outlet passage 5, and the inner pump oil chamber 428 is connected to the oil inlet 5121 of the second one-way oil outlet passage 6.

[0030] The oil storage cylinder 43 is arranged on the lower surface of the bottom plate 41, and the oil storage chamber of the oil storage cylinder is connected with the inner pump oil chamber 428 and the outer pump oil chamber 427, and is also connected with the return oil section 712 of the oil leakage oil circuit 7 and the return oil section 712 of the return oil circuit 8.

[0031] Specifically, the first one-way oil outlet passage 5 and the second one-way oil outlet passage 6 each include an oil outlet channel 51 , an oil outlet ball 52 , a spring 55 and an oil outlet bolt 54 .

[0032] The oil outlet channel 51 is opened in the bottom plate 41 and is divided into an oil inlet section 512 and an oil outlet section 511. The diameter of the oil inlet section 512 is smaller than the diameter of the oil outlet section 511, so a step is formed at the junction of the oil inlet section 512 and the oil outlet section 511. The step surface is inclined to form a bell mouth structure 53. The end of the oil inlet section 512 facing away from the oil outlet section 511 is an oil inlet 5121. The oil outlet bolt 54, the spring 55 and the oil outlet ball 52 are arranged in the oil outlet section 511. The oil outlet bolt 54 is threadedly matched with the oil outlet section 511, and the oil outlet ball 52 is pushed on the bell mouth by the spring 55 to form a one-way oil outlet structure.

[0033] The oil inlet 5121 of the oil inlet section 512 in the first one-way oil outlet oil circuit 5 extends to the position of the bottom plate 41 for the pump body 42 to be installed, and is connected to the outer pump oil chamber 427 in the pump body 42, so that the hydraulic oil in the outer pump oil chamber 427 can be passed into the first one-way oil outlet oil circuit 5, and the oil outlet ball 52 in the first one-way oil outlet oil circuit 5 is pushed open under the action of pressure, so that the hydraulic oil can be passed into the oil hole 9 and the cylinder assembly 2. Similarly, the oil inlet 5121 in the second one-way oil outlet oil circuit 6 extends to the position of the bottom plate 41 for the pump body 42 to be installed, and is connected to the inner pump oil chamber 428 in the pump body 42, so that the hydraulic oil in the inner pump oil chamber 428 can be passed into the second one-way oil outlet oil circuit 6, and the oil outlet ball 52 in the second one-way oil outlet oil circuit 6 is pushed open under the action of pressure, so that the hydraulic oil can be passed into the oil hole 9 and the cylinder assembly 2.

[0034] In the oil outlet passages 51 of the first one-way oil outlet passage 5 and the second one-way oil outlet passage 6, the hydraulic oil can only flow from the oil inlet section 512 to the oil outlet section 511 under the pressure of the pump body 42, but cannot flow from the oil outlet section 511 to the oil inlet section 512. The bottom plate 41 is provided with a first oil passage 47 connecting the oil hole 9 with the oil outlet section 511 in the first one-way oil outlet passage 5, and a second oil passage 48 connecting the oil hole 9 with the oil outlet section 511 in the second one-way oil outlet passage 6.

[0035] The oil leakage circuit 7 and the oil return circuit 8 both include an oil return channel 71 and a channel opening and closing assembly 72 .

[0036] The oil return passage 8 is opened in the bottom plate 41 and is divided into an oil inlet section 711 and an oil return section 712. The diameter of the oil inlet section 711 is smaller than the diameter of the oil return section 712. Therefore, a step is formed at the connection position between the oil inlet section 711 and the oil return section 712. The step is an inclined structure, thus forming a bell-mouth structure.

[0037] One end of the oil inlet section 711 facing away from the oil return section 712 is an oil inlet 7111. The oil inlet 7111 in the pressure relief oil passage 7 extends to the oil inlet section 512 of the second one-way oil outlet oil passage 6 and is connected to the oil inlet section 512. The oil inlet 7111 in the oil return oil passage 8 extends to the oil hole 9 and is directly connected to the oil hole 9. The opening of the oil return section 712 facing away from the oil inlet section 711 is located on the side wall of the bottom plate 41; the oil return section 712 of the oil relief oil passage 7 and the oil return section 712 of the oil return oil passage 8 are both provided with an oil return hole 7121 connected to the oil storage cylinder.

[0038] The channel opening and closing assembly 72 is arranged in the oil return section 712, and includes an oil return screw 722 and an oil return ball 721. The oil return screw 722 is threadedly matched with the oil return section 712, and can push the oil return ball 721 onto the bell mouth. When the oil return screw 722 is tightened, the oil return screw 722 can press the oil return ball 721 onto the bell mouth, block the oil inlet section 711 and the oil return section 712, and make the oil leakage oil circuit 7 and the oil return oil circuit 8 in a disconnected state; when the oil return screw 722 is loosened, the oil return screw 722 moves toward the side of the oil return section 712 facing away from the oil inlet section 711, so that the oil return ball 721 can move to the side of the oil return hole 7121 corresponding to the opening of the oil return section 712. Therefore, the oil return ball 721 in the oil drain circuit 7 will move to the right side of the oil return hole 7121 under the pressure of the hydraulic oil in the inner pump oil chamber 428. Figure 2 As shown, the oil return hole 7121 is connected to the oil inlet section 711, so that the hydraulic oil flows back to the oil storage barrel 43 through the oil return hole 7121; similarly, the oil return ball 721 in the oil return oil circuit 8 will move to the bottom of the oil return hole 7121 under the pressure of the hydraulic oil in the hydraulic cylinder assembly 2, so that the oil return hole 7121 is connected to the oil inlet section 711, and the hydraulic oil in the cylinder assembly 2 flows back to the oil storage barrel 43.

[0039] The pump body 42 includes a pump barrel 422 , a pump core 421 and a push handle 44 .

[0040] The pump barrel 422 has an inner barrel 4222 and an outer barrel 4221 which are coaxially arranged. The bottoms of the inner barrel 4222 and the outer barrel 4221 are welded to the upper surface of the bottom plate 41. The space between the inner barrel 4222 and the outer barrel 4221 forms an outer oil chamber 423, and the space inside the inner barrel 4222 forms an inner oil chamber 424. The oil inlet 512 in the first one-way oil outlet passage 5 extends to the position of the bottom plate 41 corresponding to the outer oil chamber 423, so as to achieve communication with the outer oil chamber 423. The oil inlet 5121 in the second one-way oil outlet passage 6 extends to the position of the bottom plate 41 corresponding to the inner oil chamber 424, so as to achieve communication with the inner oil chamber 424. An outer oil inlet hole 425 for connecting the outer oil chamber 423 with the oil storage barrel is provided at a position of the bottom plate 41 corresponding to the outer oil chamber 423, and an inner oil inlet hole 426 for connecting the inner oil chamber 424 with the oil storage barrel is provided at a position of the bottom plate 41 corresponding to the inner oil chamber 424. A one-way valve structure 4251 is provided in both the outer oil inlet hole 425 and the inner oil inlet hole 426, so that the hydraulic oil in the oil storage barrel 43 can enter the outer pump oil chamber 427 and the inner pump oil chamber 428, but cannot flow in the opposite direction. This one-way oil inlet is a prior art. Both the outer oil inlet hole 425 and the inner oil inlet hole 426 are connected with pipelines extending toward the inside of the oil storage barrel 43, so as to realize pumping the hydraulic oil in the oil storage barrel 43 into the inner oil chamber 424 and the outer oil chamber 423.

[0041] The pump core 421 includes an inner core 4212 and an outer core 4211 which are coaxially arranged. The inner pump oil chamber 428 is formed by the inner core 4212 and the inner oil chamber 424 . The outer pump oil chamber 427 is formed by the outer core 4211 and the outer oil chamber 423 .

[0042] The handle 44 is installed on the base plate 41 in a lever structure and is connected to the pump core 421 to drive the pump core 421 to move up and down relative to the pump body 42, so as to pump the hydraulic oil in the oil storage cylinder 43 into the inner pump oil chamber 428 and the outer pump oil chamber 427 at the same time, or to press out the hydraulic oil in the outer pump oil chamber 427 and the inner pump oil chamber 428.

[0043] The first pipeline 6 includes an oil pipe, a tee pipe 62 and a pressure gauge 63. The tee pipe 62 is fixed on the frame 1. The oil hole 9 is connected to one of the pipe ends of the tee pipe 62 through the oil pipe 64. The oil cylinder assembly is connected to the other pipe end of the tee pipe 62 through the oil pipe 61. The pressure gauge 63 is connected to the remaining pipe end of the tee pipe 62. This structure makes it easy for the staff to observe the real-time pressure of the hydraulic oil.

[0044] During use, when the channel opening and closing assembly 72 in the oil drain circuit is in a closed state, the staff pulls the pump core 421 upwards by pressing the hand 44, and pumps the hydraulic oil in the oil storage cylinder 43 into the inner pump oil chamber 428 and the outer pump oil chamber 427 at the same time, and then presses the hand 44 downwards to move the pump core 421 downwards, and presses the hydraulic oil in the inner pump oil chamber 428 and the outer pump oil chamber 427 into the first one-way oil outlet circuit 5 and the second one-way oil outlet circuit 6 respectively, and then collects at the oil hole 9 and passes into the cylinder assembly 2 through the first pipeline 6, so that the piston rod in the cylinder assembly 2 achieves a downward pressing effect;

[0045] When the channel opening and closing assembly 72 in the pressure relief oil circuit is in the open state, the staff pulls the pump core 421 upwards by pressing the hand 44, and pumps the hydraulic oil in the oil storage cylinder 43 into the inner pump oil chamber 428 and the outer pump oil chamber 427 at the same time, and then presses the hand 44 downwards to move the pump core 421 downwards, and the hydraulic oil in the outer pump oil chamber 427 will be pressed into the first one-way oil outlet oil circuit 5, and then pressed into the cylinder assembly 2 through the oil hole 9 and the first pipeline 6; the hydraulic oil in the inner pump oil chamber 428 will enter the oil return section 712 through the oil inlet section 711 of the oil relief oil circuit 7, and then flow back to the oil storage cylinder through the oil return hole 7121. Therefore, in this case, the amount of oil pressed into the cylinder assembly 2 is reduced, achieving the effect of adjusting the oil amount, which is convenient for the staff to control the action of the cylinder assembly 2.

[0046] In order to return more or even all of the hydraulic oil in the first one-way oil outlet passage 5 , multiple drain oil passages 7 may be provided. In this embodiment, two drain oil passages are provided, both of which are connected to the oil inlet section 512 in the first one-way oil outlet passage 5 .

[0047] When the compression molding is completed, the oil return screw 722 in the oil return circuit 8 is loosened, and the oil return ball 721 in the oil return circuit 8 is pushed to move under the reverse force of the cylinder assembly 2, so that the oil inlet section 711 is connected with the oil return hole 7121 in the oil return section 712, so that the hydraulic oil in the cylinder assembly 2 flows back to the oil storage cylinder 43.

[0048] In this embodiment, the cylinder assembly 2 is composed of a cylinder body, a piston arranged in the cylinder body, and a spring arranged between the cylinder body and the piston. The spring can drive the piston rod to contract. Therefore, in a natural state, the hydraulic oil in the cylinder body can be pushed out of the cylinder body through the spring and flow back into the oil storage cylinder 43.

[0049] During use, the oil drain circuit 7 can be opened and closed according to the operator's needs to adjust the amount of oil pumped into the cylinder assembly 2, thereby controlling the pressure of the cylinder assembly 2 and the stroke of a single movement of the piston rod in the cylinder assembly 2.

[0050] Unless otherwise specified, in the present utility model, if there are terms such as "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or position relationship in the present utility model are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0051] Unless otherwise specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A welding press, comprising a frame, a cylinder assembly arranged on the frame, a workpiece positioning seat and an oil pump assembly for injecting oil into the cylinder assembly, wherein: The oil pump assembly comprises a base plate, an oil storage cylinder and a pump body; The bottom plate is provided with an oil hole and a first one-way oil outlet oil passage, a second one-way oil outlet oil passage and an oil return oil passage connected to the oil hole, wherein the oil hole is connected to the oil cylinder assembly through a first pipeline, and the second one-way oil outlet oil passage is also connected to an oil drain oil passage with an opening and closing function; The pump body is arranged on the upper surface of the base and has an outer pump oil chamber and an inner pump oil chamber, the outer pump oil chamber is communicated with the oil inlet of the first one-way oil outlet oil passage, and the inner pump oil chamber is communicated with the oil inlet of the second one-way oil outlet oil passage; The oil storage cylinder is arranged on the lower surface of the bottom plate, and is communicated with the inner pump oil cavity and the outer pump oil cavity, and is also communicated with the oil return section of the oil leakage oil circuit and the oil return section of the oil return oil circuit.

2. The welding press according to claim 1, characterized in that: The first one-way oil outlet passage and the second one-way oil outlet passage both include an oil outlet passage, an oil outlet ball, a spring and an oil outlet bolt; The oil outlet channel is opened in the bottom plate and is divided into an oil inlet section and an oil outlet section, and the oil inlet section and the oil outlet section are connected by a bell mouth structure; The oil outlet bolt, the spring and the oil outlet ball are arranged in the oil outlet section, and the oil outlet bolt pushes the oil outlet ball onto the bell mouth through the spring.

3. The welding press according to claim 2, characterized in that: The oil leakage circuit and the oil return circuit both include an oil return channel and a channel opening and closing assembly; The oil return oil circuit is opened in the bottom plate and is divided into an oil inlet section and an oil return section, and the oil inlet section and the oil return section are connected by a bell mouth structure; The channel opening and closing assembly is arranged in the oil return section and comprises an oil return screw and an oil return ball. The oil return screw is threadably matched with the oil return section and can push the oil return ball onto the bell mouth.

4. The welding press according to claim 3 is characterized in that: The pump body includes a pump barrel and a pump core, the pump barrel has an inner oil cavity and an outer oil cavity, the pump core includes an inner core and an outer core, the inner pump oil cavity is formed by the inner core and the inner oil cavity, and the outer pump oil cavity is formed by the outer core and the outer oil cavity.

5. The welding press according to claim 1, characterized in that: The first pipeline includes an oil pipe, a tee and a pressure gauge, the tee is fixed on the frame, the oil hole is connected to one of the pipe ends of the tee through the oil pipe, the cylinder assembly is connected to the other pipe end of the tee through the oil pipe, and the pressure gauge is connected to the remaining pipe end of the tee.

6. The welding press according to claim 1, characterized in that: A plurality of positioning holes arranged up and down are arranged on both sides of the bracket, positioning pins are inserted into the positioning holes, and the workpiece positioning seat is arranged on the positioning pins.

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