Core-pulling mold frame of single-hydraulic-cylinder powder forming machine

Abstract

The utility model belongs to the technical field of powder forming machines, and particularly relates to a core-pulling die frame of a single-hydraulic-cylinder powder forming machine, which comprises a lower punching assembly, a middle die assembly and an upper punching assembly, the lower punching assembly comprises a lower bottom plate and a lower connecting plate, a plurality of equal-height blocks are arranged between the lower bottom plate and the lower connecting plate, and a lower punch is arranged on the upper surface of the lower connecting plate; the middle die assembly comprises a middle die plate, a die hole is formed in the middle die plate, a core shaft is arranged in the die hole, an annular gap exists between the core shaft and the middle die plate, the bottom face of the core shaft and the bottom face of the middle die plate are connected with a core rod and a hanging rod respectively, the core rod is connected with the lower punch and the lower connecting plate in a sliding mode, and the lower end of the core rod and the lower end of the hanging rod are connected with a core shaft plate. The upper punching assembly comprises an upper connecting plate, and an upper punch is arranged at the bottom of the upper connecting plate. The lower end face of the upper punch and the upper end face of the lower punch are both in a circular ring shape, and the upper punch and the lower punch can be just inserted into the annular gap. The problems that when an existing single-hydraulic-cylinder powder forming machine is used for producing annular and tubular products, cost is high, and productivity is low are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder molding machines, and particularly relates to a core-pulling die carrier for a single hydraulic cylinder powder molding machine. Background Art

[0002] A powder molding machine is a device that presses metal or non-metal powders into shapes. The single hydraulic cylinder powder molding machine has a simple structure and a low price, and is the first choice for most factories with limited capital budgets and small scales, with a very high market share. However, because it has only one hydraulic cylinder, it can only be used to produce products such as plates and bars, and the products that can be produced are single, and it cannot be used to produce ring-shaped or tubular products.

[0003] In order to produce ring-shaped or tubular products, usually a single hydraulic cylinder powder molding machine is used to press out a blank, and before or after the blank is fired, a diamond wire cutting machine, a lathe or other equipment is used to process holes in the blank; this method will cause material waste, increase the cost of auxiliary materials and labor costs, and have low productivity. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a core-pulling die carrier for a single hydraulic cylinder powder molding machine to solve the problems of high cost and low productivity in the production of ring-shaped and tubular products by the existing single hydraulic cylinder powder molding machine.

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

[0006] A core-pulling die carrier for a single hydraulic cylinder powder molding machine includes a lower punch assembly, a middle die assembly and an upper punch assembly;

[0007] The lower punch assembly includes a lower bottom plate and a lower connecting plate arranged in parallel. A plurality of equal-height blocks are arranged between the lower bottom plate and the lower connecting plate. A lower punch head is arranged on the upper surface of the lower connecting plate, and the upper end surface of the lower punch head is annular;

[0008] The middle die assembly includes a middle template located above the lower punch head. A die hole is arranged on the middle template, and a core shaft is arranged in the die hole. There is an annular gap between the core shaft and the middle template. The bottom surfaces of the core shaft and the middle template are respectively connected with a core rod and a plurality of suspension rods. The core rod penetrates through the lower punch head and the lower connecting plate and is slidably connected with the lower punch head and the lower connecting plate. The lower ends of the core rod and the suspension rods are connected with a core shaft plate, and the core shaft plate is located between the plurality of equal-height blocks of the lower punch assembly;

[0009] The upper punch assembly includes an upper connecting plate. An upper punch head is arranged at the bottom of the upper connecting plate, and the lower end surface of the upper punch head is annular;

[0010] The upper punch head and the lower punch head can just be inserted into the annular gap between the core shaft and the middle template.

[0011] Furthermore, a plurality of equal-height columns are provided between the lower bottom plate and the lower connecting plate, and the plurality of equal-height columns are symmetrically located on both sides of the core shaft plate.

[0012] Furthermore, the upper end and the lower end of the core rod are respectively threadedly connected to the core shaft and the core shaft plate, and the distance between the core shaft and the core shaft plate can be adjusted by the core rod.

[0013] Furthermore, limit protrusions are provided at the upper end of the upper punch and the lower end of the lower punch. The upper punching assembly and the lower punching assembly are respectively provided with an upper positioning ring and a lower positioning ring. Ring grooves are provided on the inner walls of the upper positioning ring and the lower positioning ring. The limit protrusions of the upper punch and the lower punch are respectively clamped in the ring grooves of the upper positioning ring and the lower positioning ring, and the upper positioning ring and the lower positioning ring are respectively threadedly connected to the upper connecting plate and the lower connecting plate.

[0014] Furthermore, three cushion blocks are provided on the bottom surface of the middle template, and the three cushion blocks are respectively installed on the left side, the right side and the rear side of the middle template.

[0015] Furthermore, the diameter of the core rod is 12 - 25 mm, and the diameter of the suspension rod is 20 - 40 mm.

[0016] Compared with the prior art, the utility model has the following beneficial technical effects:

[0017] By installing the core-pulling die carrier of the present application on a single hydraulic cylinder powder molding machine, it enables the machine to directly produce ring-shaped and tubular products, expands the application field of the single hydraulic cylinder powder molding machine, can effectively reduce the production processes of ring-shaped and tubular products, avoid waste of materials, save production costs, and effectively improve production efficiency and production capacity. Description of the Drawings

[0018] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 is a cross-sectional view of the utility model;

[0020] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0021] The reference numerals in the drawings of the specification include:

[0022] Lower punching assembly 1, lower bottom plate 11, lower connecting plate 12, equal-height block 13, equal-height column 14, lower punch 15, lower positioning ring 16, middle die assembly 2, middle template 21, cushion block 22, die hole 23, core shaft 24, core rod 25, suspension rod 26, core shaft plate 27, upper punching assembly 3, upper connecting plate 31, upper punch 32, upper positioning ring 33, tubular die cavity 4. Detailed Embodiments

[0023] The following is a further detailed description through specific embodiments:

[0024] Embodiment

[0025] As Figure 1 shown, a core-pulling die carrier of a single hydraulic cylinder powder molding machine includes a lower punch assembly 1, a middle die assembly 2, and an upper punch assembly 3.

[0026] As Figure 1-2 shown, the lower punch assembly 1 includes a lower bottom plate 11 and a lower connecting plate 12 arranged in parallel. Four equal-height blocks 13 and four equal-height columns 14 are fixed between the lower bottom plate 11 and the lower connecting plate 12. The four equal-height blocks 13 are respectively located at the four corners of the lower bottom plate 11, and the four equal-height columns 14 are symmetrically installed on the front and rear sides of the lower bottom plate 11. The upper surface of the lower connecting plate 12 is provided with a lower punch 15. The upper end surface of the lower punch 15 is annular. A limiting protrusion is formed at the lower end of the lower punch 15. A lower positioning ring 16 is arranged outside the limiting protrusion. A ring groove is opened on the inner wall of the lower positioning ring 16. The limiting protrusion of the lower punch 15 is clamped in the ring groove of the lower positioning ring 16. The lower positioning ring 16 is fixed on the lower connecting plate 12 by bolts.

[0027] As Figure 2 shown, the middle die assembly 2 includes a middle template 21 located above the lower punch 15. A backing plate 22 is respectively installed on the left, right, and rear sides of the bottom of the middle template 21 by bolts; a die hole 23 is opened on the middle template 21. A core shaft 24 is arranged in the die hole 23. There is an annular gap between the core shaft 24 and the middle template 21. The bottom surfaces of the core shaft 24 and the middle template 21 are respectively connected with a core rod 25 and four suspension rods 26. The core rod 25 penetrates through the lower punch 15 and the lower connecting plate 12 and is slidably connected with the lower punch 15 and the lower connecting plate 12. The lower end of the core rod 25 is connected with a core shaft plate 27. The lower ends of the four suspension rods 26 are respectively connected to the four corners of the core shaft plate 27. The core shaft plate 27 is located between the four equal-height blocks 13 and the four equal-height columns 14 of the lower punch assembly 1; the diameter of the core rod 25 is 18.5 mm, and the diameter of the suspension rod 26 is 30 mm.

[0028] As Figure 2-3 shown, the upper punch assembly 3 includes an upper connecting plate 31. The bottom of the upper connecting plate 31 is provided with an upper punch 32. The lower end surface of the upper punch 32 is annular. A limiting protrusion is formed at the upper end of the upper punch 32. An upper positioning ring 33 is arranged outside the limiting protrusion. A ring groove is opened on the inner wall of the upper positioning ring 33. The limiting protrusion of the upper punch 32 is clamped in the ring groove of the upper positioning ring 33. The upper positioning ring 33 is fixed on the upper connecting plate 31 by bolts.

[0029] As Figure 2As shown, the lower end of the upper punch 32 and the upper end of the lower punch 15 can just be inserted into the annular gap between the mandrel 24 and the middle template 21. After the upper end of the lower punch 15 is inserted into the annular gap, a tubular cavity 4 is formed among the lower punch 15, the middle template 21 and the mandrel 24.

[0030] A plurality of threaded holes are provided on the upper connecting plate 31 and the lower connecting plate 12. By installing upper punches 32, lower punches 15, middle templates 21 and mandrels 24 with different sizes on the upper connecting plate 31 and the lower connecting plate 12, the production of tubular and annular products with different inner diameters can be realized.

[0031] The specific implementation is as follows:

[0032] Install the core-pulling die carrier of the present application on a single hydraulic cylinder powder molding machine, wherein the upper connecting plate 31, the middle template 21 and the lower bottom plate 11 are respectively installed on the upper punch mounting plate, the middle die mounting plate and the lower punch mounting plate of the powder molding machine; after the installation is completed, the middle die assembly 2 is moved downward by the driving member of the powder molding machine until the lower punch 15 is inserted into the annular gap between the middle template 21 and the mandrel 24. At this time, a tubular cavity 4 is formed among the lower punch 15, the middle template 21 and the mandrel 24; after the powder to be molded is poured into the tubular cavity 4, the upper punch assembly 3 is driven to move downward by the driving member of the powder molding machine, so that the upper punch 32 is inserted into the annular gap between the middle template 21 and the mandrel 24, and the powder in the tubular cavity 4 is extruded downward until the powder is extruded into a tubular product, and then the upper punch assembly 3 and the middle die assembly 2 are moved upward to take out the molded tubular product.

[0033] The core-pulling die carrier of the present application can be used on a single hydraulic cylinder powder molding machine. On the basis of retaining its ability to produce plates and bars, it enables the production of annular and tubular products directly, expands the application field of the single hydraulic cylinder powder molding machine, can effectively reduce the production processes of annular and tubular products, avoid waste of materials, save production costs, and effectively improve production efficiency and production capacity; moreover, the structure of the core-pulling die carrier is simple, easy to operate, and convenient and fast to disassemble and install.

[0034] The above are only the embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can still be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by the present application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A core-pulling die carrier of a single hydraulic cylinder powder molding machine, characterized in that: It includes a lower punch assembly (1), an intermediate die assembly (2) and an upper punch assembly (3); The lower punch assembly (1) includes a lower bottom plate (11) and a lower connecting plate (12) arranged in parallel. A plurality of equal-height blocks (13) are provided between the lower bottom plate (11) and the lower connecting plate (12). The upper surface of the lower connecting plate (12) is provided with a lower punch (15), and the upper end surface of the lower punch (15) is annular; The intermediate die assembly (2) includes an intermediate template (21) located above the lower punch (15). A die hole (23) is provided on the intermediate template (21). A core shaft (24) is provided in the die hole (23). There is an annular gap between the core shaft (24) and the intermediate template (21). The bottom surfaces of the core shaft (24) and the intermediate template (21) are respectively connected with a core rod (25) and a plurality of suspension rods (26). The core rod (25) penetrates through the lower punch (15) and the lower connecting plate (12) and is slidably connected with the lower punch (15) and the lower connecting plate (12). The lower ends of the core rod (25) and the suspension rods (26) are connected with a core shaft plate (27). The core shaft plate (27) is located between the plurality of equal-height blocks (13) of the lower punch assembly (1); The upper punch assembly (3) includes an upper connecting plate (31). The bottom of the upper connecting plate (31) is provided with an upper punch (32), and the lower end surface of the upper punch (32) is annular; The upper punch (32) and the lower punch (15) can just be inserted into the annular gap between the core shaft (24) and the intermediate template (21).

2. The core-pulling die carrier of the single hydraulic cylinder powder molding machine according to claim 1, characterized in that: A plurality of equal-height columns (14) are also provided between the lower bottom plate (11) and the lower connecting plate (12). The plurality of equal-height columns (14) are symmetrically located on both sides of the core shaft plate (27).

3. The core-pulling die carrier of the single hydraulic cylinder powder molding machine according to claim 1, characterized in that: The upper and lower ends of the core rod (25) are respectively threadedly connected with the core shaft (24) and the core shaft plate (27), and the distance between the core shaft (24) and the core shaft plate (27) can be adjusted by the core rod (25).

4. The core-pulling die carrier of the single hydraulic cylinder powder molding machine according to any one of claims 1-3, characterized in that: Limit protrusions are provided at the upper end of the upper punch (32) and the lower end of the lower punch (15). An upper positioning ring (33) and a lower positioning ring (16) are respectively provided on the upper punch assembly (3) and the lower punch assembly (1). Ring grooves are provided on the inner walls of the upper positioning ring (33) and the lower positioning ring (16). The limit protrusions of the upper punch (32) and the lower punch (15) are respectively clamped in the ring grooves of the upper positioning ring (33) and the lower positioning ring (16). The upper positioning ring (33) and the lower positioning ring (16) are respectively threadedly connected with the upper connecting plate (31) and the lower connecting plate (12).

5. The core-pulling die carrier of the single hydraulic cylinder powder molding machine according to claim 1, characterized in that: Three cushion plates (22) are provided on the bottom surface of the intermediate template (21). The three cushion plates (22) are respectively installed on the left side, right side and rear side of the intermediate template (21).

6. The core-pulling die carrier of the single hydraulic cylinder powder molding machine according to claim 1, characterized in that: The diameter of the core rod (25) is 12 - 25 mm, and the diameter of the suspension rod (26) is 20 - 40 mm.

Images