Hard alloy bar cold press forming device capable of adjusting pressure

Abstract

The utility model relates to the field of cold press forming, and discloses a pressure-adjustable hard alloy bar cold press forming device which comprises a base and a pressing die, the pressing die comprises a lower die and an upper die, the lower die is arranged on the base, and a portal frame is fixedly mounted at the top of the base. The cold press forming device has the following advantages and effects that the downward moving height of the upper die can be accurately controlled through the limiting assembly, pressure adjustment and control during cold press forming of the hard alloy rods are achieved, the cold press forming requirements of the hard alloy rods of different specifications can be met, the universality and flexibility of equipment are enhanced, and the production efficiency is improved. When the distance between the abutting plate and the baffle is not changed, it can be ensured that the downward moving height of the upper die is fixed each time, the pressure generated when the hard alloy rods are subjected to cold press forming each time is not changed, and batch cold press forming machining operation can be efficiently conducted on the hard alloy rods with the same specification requirement; and the quality stability and consistency of the hard alloy bars which are produced in batches and have the same specification requirement are ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cold pressing forming, in particular to a hard alloy rod cold pressing forming device capable of adjusting pressure. BACKGROUND

[0002] The hard alloy rod is an alloy material made of hard compound of refractory metal as hard phase and bonding metal as bonding phase through powder metallurgy process, at present, the hard alloy rod is mainly used for manufacturing metal cutting tools such as drill, end mill and twist drill. The hard alloy rod cold pressing forming device is equipment for putting hard alloy powder into a pressing mold and pressing into a rod-shaped blank with certain shape and size at room temperature.

[0003] In the related art, the hard alloy rod cold pressing forming device usually adopts a hydraulic cylinder to control the downward movement of an upper mold to complete the hard alloy rod cold pressing forming operation with a lower mold. The pressure of the hard alloy rod cold pressing forming process is different when the stroke of the downward movement of the upper mold controlled by the hydraulic cylinder is different. However, it is found in actual operation that there are at least the following deficiencies: when batch producing hard alloy rods with the same specification requirements, it is difficult to ensure that the downward movement height of the upper mold controlled by the hydraulic cylinder is fixed every time, and then the pressure of the hard alloy rod cold pressing forming every time is prone to deviation, resulting in inconsistent quality of the batch produced hard alloy rods with the same specification requirements.

[0004] Therefore, the application provides a hard alloy rod cold pressing forming device capable of adjusting pressure to solve the above problems. CONTENT OF THE INVENTION

[0005] The application aims to provide a hard alloy rod cold pressing forming device capable of adjusting pressure, which can accurately control the downward movement height of the upper mold by using a limiting assembly, realize the pressure adjustment and control of the hard alloy rod cold pressing forming, meet the cold pressing forming requirements of hard alloy rods with different specifications, enhance the versatility and flexibility of the equipment, and ensure that the downward movement height of the upper mold is fixed every time when the spacing between the abutment plate and the baffle plate does not change, so that the pressure of the hard alloy rod cold pressing forming every time is constant, the same specification hard alloy rods can be efficiently batch cold pressing formed, and the stability and consistency of the quality of the batch produced hard alloy rods with the same specification requirements are ensured.

[0006] The above technical purposes of the application are achieved by the following technical scheme: a hard alloy rod cold pressure forming device with adjustable pressure, comprising a base and a pressing die, the pressing die comprises a lower die and an upper die, the lower die is arranged on the base, the top of the base is fixedly installed with a gantry, the top of the gantry is fixedly installed with a hydraulic cylinder one, the upper die is arranged at the output shaft end of the hydraulic cylinder one and located directly above the lower die, the two sides of the upper die are provided with cross beams, the top of the two cross beams is fixedly installed with a vertical guide rod, and the top of the gantry is provided with a limiting assembly for controlling the descending height of the upper die.

[0007] Further provided in the application is that the lower die comprises two semicylindrical lower die seats, the bottom of the two semicylindrical lower die seats is in sliding contact with the top of the base, the side of the two semicylindrical lower die seats close to each other is in abutment, and the side of the two semicylindrical lower die seats close to each other is provided with a semicircular forming cavity with an open top structure, and the two semicircular forming cavities combine to form a die cavity for cold pressure forming of a hard alloy rod.

[0008] Further provided in the application is that the side of the two semicylindrical lower die seats away from each other is fixedly installed with a connecting block, the top of the base is fixedly installed with two seat blocks, the lower die is located between the two seat blocks, the top of the two seat blocks is fixedly installed with an electric telescopic rod, and the output shaft end of the two electric telescopic rods is fixedly connected with the corresponding connecting block.

[0009] Further provided in the application is that the bottom of the two semicylindrical lower die seats is fixedly installed with a guide block, and the top of the base is provided with two guide grooves, and the two guide blocks are slidingly installed in the corresponding guide grooves.

[0010] Further provided in the application is that the upper die comprises an upper die seat, a pressure sensor and a pressing punch, the upper die seat is fixedly installed at the output shaft end of the hydraulic cylinder one, the pressure sensor is fixedly installed at the bottom of the upper die seat, the pressing punch is fixedly installed at the bottom of the pressure sensor, and the two cross beams are fixedly installed on the outer side wall of the upper die seat and symmetrically distributed.

[0011] Further provided in the application is that the top of the gantry is fixedly embedded with two guide sleeves, and the top end of the two vertical guide rods is slidingly penetrated through the corresponding guide sleeve.

[0012] Further provided in the application is that the limiting assembly comprises a hydraulic cylinder two, a baffle and a contact plate, the hydraulic cylinder two is fixedly installed at the top of the gantry, the baffle is fixedly installed at the output shaft end of the hydraulic cylinder two, the contact plate is fixedly installed at the top end of one of the vertical guide rods, and the contact plate is located above the baffle.

[0013] The further arrangement of the application is that the front side wall of the portal frame is fixedly provided with a controller, the hydraulic cylinder one, the hydraulic cylinder two, the two electric telescopic rods and the pressure sensor are electrically connected with the controller, and the controller is provided with a display screen and a plurality of control buttons.

[0014] The application has at least one of the following beneficial technical effects:

[0015] The application can accurately control the downward movement height of the upper die by using the limiting assembly, realize the pressure regulation and control during the cold pressure forming of the hard alloy rod, meet the cold pressure forming requirements of hard alloy rods of different specifications, enhance the versatility and flexibility of the equipment, and ensure that the downward movement height of the upper die is fixed and unchanged each time when the spacing between the stop plate and the baffle plate does not change, so that the pressure during the cold pressure forming of the hard alloy rod each time is unchanged, the same specification hard alloy rod can be efficiently cold pressure formed in batch, and the stability and consistency of the quality of the same specification hard alloy rods produced in batch are ensured.

[0016] The application can control the opening and closing of the two semicylindrical lower die seats by using the two electric telescopic rods, can conveniently take out the cold pressure formed hard alloy rod, realizes the advantage of convenient material taking, and is simple to operate.

[0017] The application can control the vertical lifting of the upper die by using the hydraulic cylinder one, the greater the height of the upper die controlled to descend by the hydraulic cylinder one, the greater the pressure when the upper die and the lower die are combined, that is, the greater the pressure exerted by the pressing convex die on the hard alloy powder, and vice versa, the smaller the height of the upper die controlled to descend by the hydraulic cylinder one, the smaller the pressure when the upper die and the lower die are combined, that is, the smaller the pressure exerted by the pressing convex die on the hard alloy powder, and then the pressure value during the cold pressure forming of the hard alloy rod can be adjusted according to requirements.

[0018] The application can monitor the pressure value during the cold pressure forming of the hard alloy rod by using the pressure sensor, and can display the pressure value during the cold pressure forming on the display screen of the controller for the staff to check. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of the embodiment.

[0020] Figure 2 is a schematic diagram of the main view and cross-sectional view of the lower die.

[0021] Figure 3 is a schematic diagram of the three-dimensional structure of the semicylindrical lower die seat.

[0022] Figure 4 is a schematic diagram of the three-dimensional structure of the upper die.

[0023] In the figure, 1, base; 2, lower mold; 21, semi-cylindrical lower mold base; 22, semi-circular forming cavity; 23, guide block; 3, upper mold; 31, upper mold base; 32, pressure sensor; 33, pressing punch; 4, gantry; 5, hydraulic cylinder I; 6, cross beam; 7, vertical guide rod; 8, hydraulic cylinder II; 9, baffle; 10, abutting plate; 11, guide sleeve; 12, cushion base; 13, electric telescopic rod; 14, connecting block; 15, guide groove; 16, controller. DETAILED DESCRIPTION

[0024] The technical solutions of the present application will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present application provides a hard alloy rod cold pressure forming device with adjustable pressure, comprising a base 1 and a pressing mold, wherein:

[0026] The pressing die comprises a lower die 2 and an upper die 3, the lower die 2 is arranged on the base 1, the lower die 2 comprises two semi-cylindrical lower die seats 21, the bottom of each of the two semi-cylindrical lower die seats 21 is in sliding contact with the top of the base 1, the side close to each other of the two semi-cylindrical lower die seats 21 abuts, and the side close to each other of the two semi-cylindrical lower die seats 21 is provided with a semi-circular forming cavity 22 with an open top structure, the two semi-circular forming cavities 22 combine to form a die cavity for cold pressing forming a carbide rod, the die cavity is used to contain carbide powder, so as to facilitate subsequent cold pressing forming to make a carbide rod, the top of the base 1 is fixedly installed with a gantry 4, the top of the gantry 4 is fixedly installed with a hydraulic cylinder one 5, the upper die 3 is arranged at the output shaft end of the hydraulic cylinder one 5 and directly above the lower die 2, the hydraulic cylinder one 5 is used to control the vertical lifting of the upper die 3, thereby facilitating the die closing and die opening of the upper die 3 and the lower die 2, and the greater the height of the upper die 3 controlled to descend by the hydraulic cylinder one 5, the greater the pressure when the upper die 3 and the lower die 2 are closed, and vice versa, the smaller the height of the upper die 3 controlled to descend by the hydraulic cylinder one 5, the smaller the pressure when the upper die 3 and the lower die 2 are closed, both sides of the upper die 3 are provided with cross beams 6, the top of each of the two cross beams 6 is fixedly installed with a vertical guide rod 7, the upper die 3 comprises an upper die seat 31, a pressure sensor 32 and a pressing punch 33, the upper die seat 31 is fixedly installed at the output shaft end of the hydraulic cylinder one 5, the pressure sensor 32 is fixedly installed at the bottom of the upper die seat 31, and the pressing punch 33 is fixedly installed at the bottom of the pressure sensor 32, both of the two cross beams 6 are fixedly installed on the outer side wall of the upper die seat 31 and are symmetrically distributed, the pressing punch 33 is used to apply pressure to the carbide powder in the die cavity composed of the two semi-cylindrical forming cavities 22 by descending and inserting into the die cavity, so as to cold pressing form a carbide rod, and the pressure sensor 32 is used to monitor the pressure value when the carbide rod is cold pressed.

[0027] In this embodiment, the top of the gantry 4 is provided with a limiting assembly for controlling the downward displacement height of the upper die 3, the limiting assembly comprises a hydraulic cylinder 8, a baffle 9 and a contact plate 10, the hydraulic cylinder 8 is fixedly installed on the top of the gantry 4, the baffle 9 is fixedly installed on the output shaft end of the hydraulic cylinder 8, and the contact plate 10 is fixedly installed on the top end of one of the vertical guide rods 7. The contact plate 10 is located above the baffle 9. The hydraulic cylinder 8 is used to control the vertical lifting of the baffle 9, thereby changing the distance between the contact plate 10 and the baffle 9, that is, the downward displacement height of the upper die 3 can be accurately controlled, the pressure during the cold pressure forming of the hard alloy rod can be adjusted and controlled, the cold pressure forming requirements of hard alloy rods of different specifications can be met, the versatility and flexibility of the equipment are enhanced, and when the distance between the contact plate 10 and the baffle 9 does not change, the downward displacement height of the upper die 3 can be fixed each time, so that the pressure during the cold pressure forming of the hard alloy rod each time is unchanged, the same specification hard alloy rod can be efficiently cold pressure formed in batch operation, the stability and consistency of the quality of the same specification hard alloy rod produced in batch can be ensured, and defects of the hard alloy rod caused by improper pressure can be avoided.

[0028] In this embodiment, the two semicylindrical lower die seats 21 are fixedly installed with connecting blocks 14 on the sides away from each other, the top of the base 1 is fixedly installed with two pad seats 12, the lower die 2 is located between the two pad seats 12, the top of each of the two pad seats 12 is fixedly installed with an electric telescopic rod 13, the output shaft ends of the two electric telescopic rods 13 are fixedly connected with corresponding connecting blocks 14, and the two semicylindrical lower die seats 21 are controlled to open and close through the two electric telescopic rods 13. The operation is simple, the degree of automation is high, the cold pressure formed hard alloy rod is convenient to take out, the advantages of convenient material taking are achieved, and the production efficiency is improved. Figure 1 As shown in FIG. 8, the two electric telescopic rods 13 are in an elongated state, the bottom of each of the two semicylindrical lower die seats 21 is fixedly installed with a guide block 23, the top of the base 1 is provided with two guide grooves 15, and the two guide blocks 23 are slidingly installed in corresponding guide grooves 15. Through the sliding connection of the guide block 23 and the guide groove 15, the running direction of the semicylindrical lower die seat 21 is guided, and the movement stroke of the semicylindrical lower die seat 21 is limited, so that the semicylindrical lower die seat 21 can stably move horizontally and linearly on the top of the base 1.

[0029] In this embodiment, the top of the gantry 4 is fixedly embedded with two guide sleeves 11, the top ends of the two vertical guide rods 7 slidingly penetrate the corresponding guide sleeves 11. Through the cooperation of the vertical guide rod 7 and the guide sleeve 11, the accurate guidance of the upper die 3 during movement is ensured, and the accurate die closing and die opening of the upper die 3 and the lower die 2 can be ensured.

[0030] In this embodiment, the front side wall of the gantry 4 is fixedly provided with a controller 16, the hydraulic cylinder one 5, the hydraulic cylinder two 8, the two electric telescopic rods 13 and the pressure sensor 32 are electrically connected with the controller 16, the controller 16 is provided with a display screen and a plurality of control buttons, the pressure value of the hard alloy rod during cold pressure forming monitored and acquired by the pressure sensor 32 can be displayed on the display screen for the staff to watch, and the plurality of control buttons are used to control the electric operation of the hydraulic cylinder one 5, the hydraulic cylinder two 8, the two electric telescopic rods 13 and the pressure sensor 32 respectively. It needs to be supplemented that the electrical connection mode and the control mode of the hydraulic cylinder one 5, the hydraulic cylinder two 8, the two electric telescopic rods 13, the pressure sensor 32 and the controller 16 belong to the mature technology in the field, so they are fully disclosed and described herein.

[0031] Through the above structure, the working principle of the hard alloy rod cold pressure forming device with adjustable pressure provided by the present application is as follows:

[0032] By controlling the elongation operation of the two electric telescopic rods 13, the two semicircular cylindrical lower die seats 21 can be pushed to move in the direction of approaching each other until the two semicircular cylindrical lower die seats 21 tightly abut each other, at which time the operation of the two electric telescopic rods 13 is stopped. Then the hard alloy powder is put into the die cavity formed by the two semicircular forming cavities 22, and then the elongation operation of the hydraulic cylinder one 5 is controlled, so as to push the upper die 3 to vertically move downward. The upper die 3 drives the two cross beams 6, the two vertical guide rods 7 and the abutting plate 10 to vertically move downward. When the pressing punch 33 on the upper die 3 gradually descends and inserts into the die cavity composed of the two semicircular forming cavities 22 to apply pressure to the hard alloy powder, the cold pressure forming of the hard alloy rod can be carried out. In the cold pressure forming process, the pressure value during the cold pressure forming of the hard alloy rod can be monitored by the pressure sensor 32 and displayed on the display screen of the controller 16. When the pressing punch 33 applies the required pressure value to the hard alloy powder, the operation of the hydraulic cylinder one 5 is stopped, that is, the cold pressure forming operation of the hard alloy rod is completed. Then the hydraulic cylinder one 5 is controlled to reset to drive the upper die 3 to move upward to the original position. The pressing punch 33 will move out of the die cavity composed of the two semicircular forming cavities 22. Then the electric telescopic rods 13 are controlled to reset, so as to push the two semicircular cylindrical lower die seats 21 to move in the direction of moving away from each other. The staff can conveniently take out the formed hard alloy rod, realizing the function of convenient material taking;

[0033] During the cold pressure forming operation of the hard alloy rod, the greater the height of the upper die 3 controlled to descend by the hydraulic cylinder one 5, the greater the pressure when the upper die 3 and the lower die 2 are combined, that is, the greater the pressure applied by the pressing punch 33 to the hard alloy powder. Conversely, the smaller the height of the upper die 3 controlled to descend by the hydraulic cylinder one 5, the smaller the pressure when the upper die 3 and the lower die 2 are combined, that is, the smaller the pressure applied by the pressing punch 33 to the hard alloy powder. Thus, the pressure value during the cold pressure forming of the hard alloy rod can be adjusted according to the requirements.

[0034] In the batch production of the same specification of hard alloy rod cold pressure forming operation, the hydraulic cylinder 8 can control the vertical lifting of the baffle 9, the distance between the baffle 9 and the stop plate 10 can be changed, that is, the down movement height of the upper die 3 can be accurately controlled, the pressure adjustment and control during the cold pressure forming of the hard alloy rod can be realized, the cold pressure forming requirements of different specifications of hard alloy rods can be met, the versatility and flexibility of the equipment are enhanced, and when the distance between the stop plate 10 and the baffle 9 does not change, the down movement height of the upper die 3 is fixed every time, so that the pressure during the cold pressure forming of the hard alloy rod is constant every time, the same specification of hard alloy rod can be efficiently cold pressure formed in batch operation, the stability and consistency of the quality of the same specification of hard alloy rod produced in batch can be ensured, and defects of the hard alloy rod caused by improper pressure can be avoided.

Claims

1. A cold press forming device for a cemented carbide rod with adjustable pressure, characterized in that, The utility model relates to a cold pressing device for hard alloy rod, including base (1) and pressing mould, the pressing mould includes lower mould (2) and upper mould (3), the lower mould (2) sets up on the base (1), the top of base (1) is fixedly installed with gantry (4), the top of gantry (4) is fixedly installed with hydraulic cylinder one (5), the upper mould (3) sets up in the output shaft end of hydraulic cylinder one (5) and is located the right above lower mould (2), the both sides of upper mould (3) are all provided with crossbeam (6), the top of two crossbeam (6) is all fixedly installed with vertical guide rod (7), the top of gantry (4) is provided with the limiting component for controlling the descending height of upper mould (3).

2. A cold press forming device for cemented carbide rods with adjustable pressure according to claim 1, characterized in that: The lower mould (2) includes two half cylindrical lower mould seats (21), the bottom of two half cylindrical lower mould seats (21) is in sliding contact with the top of base (1), the side of two half cylindrical lower mould seats (21) is abutted, the side of two half cylindrical lower mould seats (21) is all provided with half circle forming cavity (22) of open top structure, two half circle forming cavities (22) are combined to form the mould cavity for cold pressing hard alloy rod.

3. A cold press forming device for cemented carbide rods with adjustable pressure according to claim 2, characterized in that: The side of two half cylindrical lower mould seats (21) is all fixedly installed with connecting block (14), the top of base (1) is fixedly installed with two pads (12), the lower mould (2) is located between two pads (12), the top of two pads (12) is all fixedly installed with electric telescopic rod (13), the output shaft end of two electric telescopic rods (13) is fixedly connected with corresponding connecting block (14) respectively.

4. A cold press forming device for cemented carbide rods of adjustable pressure according to claim 3, characterized in that: The bottom of two half cylindrical lower mould seats (21) is all fixedly installed with guide block (23), the top of base (1) is provided with two guide grooves (15), two guide blocks (23) are slidably installed in corresponding guide grooves (15) respectively.

5. A cold press forming device for cemented carbide rods of adjustable pressure according to claim 4, characterized in that: The upper mould (3) includes upper mould seat (31), pressure sensor (32) and pressing punch (33), the upper mould seat (31) is fixedly installed in the output shaft end of hydraulic cylinder one (5), the pressure sensor (32) is fixedly installed in the bottom of upper mould seat (31), the pressing punch (33) is fixedly installed in the bottom of pressure sensor (32), two crossbeam (6) are all fixedly installed on the outer side wall of upper mould seat (31) and are symmetrically distributed.

6. The cold press forming device for cemented carbide rods according to claim 1, characterized in that: The top of gantry (4) is fixedly embedded with two guide sleeves (11), the top end of two vertical guide rods (7) is slidably penetrated in corresponding guide sleeves (11) respectively.

7. A cold press forming device for cemented carbide rods with adjustable pressure according to claim 5, characterized in that: The limiting component includes hydraulic cylinder two (8), baffle (9) and contact plate (10), the hydraulic cylinder two (8) is fixedly installed on the top of gantry (4), the baffle (9) is fixedly installed in the output shaft end of hydraulic cylinder two (8), the contact plate (10) is fixedly installed in the top end of one vertical guide rod (7), and the contact plate (10) is located above the baffle (9).

8. A cold press forming device for cemented carbide rods with adjustable pressure according to claim 7, characterized in that: The front side wall of the portal frame (4) is fixedly provided with a controller (16), the hydraulic cylinder I (5), the hydraulic cylinder II (8), the two electric telescopic rods (13) and the pressure sensor (32) are electrically connected with the controller (16), and the controller (16) is provided with a display screen and a plurality of control buttons.

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