Precise positioning device for mold machining

Abstract

The utility model belongs to the technical field of mold positioning, and particularly relates to an accurate positioning device for mold machining. The device comprises a base, two sets of screw rod nut assemblies are arranged on the base, each screw rod nut assembly comprises a trapezoidal screw rod, the two trapezoidal screw rods are staggered in a cross shape and are independently distributed up and down, and nuts are arranged on the trapezoidal screw rods at intervals in a sleeving mode; a first jacking module is fixed to the tops of two nuts arranged on the trapezoidal lead screw in a sleeving mode in the longitudinal direction, the first jacking module comprises a first shell, and the face, facing the inner side, of the first shell is connected with a first jacking block through a first spring; second jacking modules are fixed to the tops of the two nuts arranged on the transversely-arranged trapezoidal lead screw in a sleeving mode, each second jacking module comprises a second shell, and the face, facing the inner side, of each second shell is connected with a second jacking block through a second spring. If the die is subjected to external force in the machining process, the nut cannot be directly pushed outwards, and the acting force is buffered and compensated through the first spring and the second spring.

Description

Technical Field

[0001] The utility model belongs to the technical field of die positioning, and particularly relates to a precise positioning device for die processing. Background Art

[0002] A die is a tool for manufacturing parts with a specific shape. By injecting liquefied raw materials into the die or stamping solid raw materials into the die, the materials can be solidified or formed into parts with the required shape. A die usually consists of an upper die and a lower die. When using the die to process parts, it is necessary to position and align the upper die and the lower die. Most dies are positioned using positioning pins and positioning blocks according to the size of the die. This positioning method is very precise. However, when replacing and using dies of different sizes, the corresponding positioning parts need to be replaced, and the operation will be very troublesome, affecting the processing efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to provide a precise positioning device for die processing, which can buffer and compensate the acting force at the clamping position during die processing.

[0004] The described precise positioning device for die processing includes a base. Two sets of lead screw nut assemblies are arranged on the base. Each lead screw nut assembly includes a trapezoidal lead screw that can rotate independently. The two trapezoidal lead screws are cross-shaped and vertically independently distributed. Nuts in threaded fit are sleeved on the trapezoidal lead screws at both sides of the intersection point at intervals.

[0005] At the tops of the two nuts sleeved on the longitudinally arranged trapezoidal lead screws, first tightening modules are fixed. Each first tightening module includes a first outer shell. On the inner side of each of the two first outer shells, a first top block is connected through a first spring. The first spring between the first outer shell and the first top block is longitudinally arranged. One end of the first spring is connected to the first outer shell, and the other end is connected to the first top block.

[0006] At the tops of the two nuts sleeved on the transversely arranged trapezoidal lead screws, second tightening modules are fixed. Each second tightening module includes a second outer shell. On the inner side of each of the two second outer shells, a second top block is connected through a second spring. The second spring between the second outer shell and the second top block is transversely arranged. One end of the second spring is connected to the second outer shell, and the other end is connected to the second top block.

[0007] When the first spring and the second spring are in a compressed state, the first top block and the second top block respectively press tightly against the die inward.

[0008] By rotating two trapezoidal lead screws, the nuts on the two trapezoidal lead screws both move inward, driving the first housing and the second housing to move inward respectively, and then driving the first top block and the second top block to tightly abut against the mold inward, clamping the mold in the inner area of the first tightening module and the second tightening module. During the mold processing, if an external force acts, it will not directly push the nut outward, but buffer and compensate the acting force through the first spring and the second spring, and the trapezoidal lead screw itself has a certain self-locking ability, so that the nut is not easily displaced, thus ensuring the accuracy during the mold processing positioning.

[0009] Further, grooves are respectively formed on the base corresponding to the trapezoidal lead screws, the trapezoidal lead screws are installed in the grooves, fixing seats are fixed at the ends in the grooves, and the trapezoidal lead screws are rotatably connected with the fixing seats.

[0010] The rear end of the longitudinally arranged trapezoidal lead screw is rotatably connected with the fixing seat, and the front end passes through the fixing seat and is rotatably connected with the fixing seat; the left end of the transversely arranged trapezoidal lead screw is rotatably connected with the fixing seat, and the right end passes through the fixing seat and is rotatably connected with the fixing seat; both the first housing and the second housing are located above the grooves, and the trapezoidal lead screws are located in the grooves, so that it is convenient to place the mold on the base above the grooves, the trapezoidal lead screws can rotate independently, and it is also convenient to fix the mold.

[0011] Further, the inside of the first housing is a hollow structure, an opening through which the first top block can independently enter and exit is formed on the side of the first housing facing inward, and the first spring is located inside the first housing;

[0012] The inside of the second housing is a hollow structure, an opening through which the second top block can independently enter and exit is formed on the side of the second housing facing inward, and the second spring is located inside the second housing;

[0013] When the first spring is in a compressed state, the end of the first top block facing the mold is located outside the first housing;

[0014] When the second spring is in a compressed state, the end of the second top block facing the mold is located outside the second housing.

[0015] The first spring is located inside the first housing, the end of the first top block facing the mold is located outside the first housing, the second spring is located inside the second housing, and the end of the second top block facing the mold is located outside the second housing; this can not only protect the first spring and the second spring, but also prevent the first top block and the second top block from tilting downward.

[0016] Further, both the first spring and the second spring are four in number.

[0017] The four first springs make the first top block more stable, the four second springs make the second top block more stable, and the buffering effect is good.

[0018] Further, one end of the first spring fixed inside the first housing is connected to a first cover plate, and one end of the second spring fixed inside the second housing is connected to a second cover plate.

[0019] Installation openings are provided on the first housing corresponding to the first cover plate and on the second housing corresponding to the second cover plate. The first cover plate is used to cover the installation opening on the first housing, and the second cover plate is used to cover the installation opening on the second housing. Blocks are fixed on the first top block at the connection end of the first spring and on the second top block at the connection part of the second spring. The block fixed on the first top block is used to prevent the first top block from moving out of the first housing during the forward and backward movement, and the block fixed on the second top block is used to prevent the second top block from moving out of the second housing during the left and right movement. The installation opening on the first housing facilitates the installation of the first top block into the first housing, and the installation opening on the second housing facilitates the installation of the second top block into the second housing.

[0020] Further, the first clamping module is symmetrically arranged front and back with respect to the axis of the trapezoidal screw rod arranged horizontally, and the second clamping module is symmetrically arranged left and right with respect to the axis of the trapezoidal screw rod arranged vertically.

[0021] The first clamping module and the second clamping module fix the mold inwardly at the center of the staggered position of the trapezoidal screw rods, which is convenient for processing positioning. During actual use, the fixed position of the mold is adjusted according to the installation position of the nuts on the trapezoidal screw rods.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] By rotating the two trapezoidal screw rods, the nuts on the two trapezoidal screw rods both move inward, driving the first housing and the second housing to move inward respectively, and then driving the first top block and the second top block to tightly press against the mold inwardly, clamping the mold in the inner area of the first clamping module and the second clamping module. If the mold is subjected to an external force during the processing, it will not directly push the nut outward, but the first spring and the second spring buffer and compensate for the acting force, and the trapezoidal screw rod itself has a certain self-locking ability, so that the nut is not easily displaced, thus ensuring the accuracy of the mold processing positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the front structural view of a mold processing precise positioning device;

[0025] Figure 2 is Figure 1 the bottom view of

[0026] Figure 3 is Figure 2 the structural schematic diagram of the first clamping module in

[0027] Figure 4 is Figure 3Cross-sectional view along A-A;

[0028] Figure 5 is Figure 2 Right view of the second clamping module in;

[0029] Figure 6 is Figure 5 Cross-sectional view along B-B in;

[0030] Figure 7 is Figure 4 Left view of the first housing in;

[0031] Figure 8 is Figure 7 Cross-sectional view along C-C;

[0032] Figure 9 is Figure 4 Schematic structural diagram of the first top block;

[0033] Figure 10 is Figure 9 Left view of;

[0034] Figure 11 is Figure 4 Schematic structural diagram of the first cover plate;

[0035] Figure 12 is Figure 11 Right view of;

[0036] Figure 13 is Figure 1 Stereogram when positioning the mold.

[0037] Names of each component in the figure: 1. Base; 2. Lead screw nut assembly; 2.1 Trapezoidal lead screw; 2.2 Fixed seat; 2.3 Nut; 3. First clamping module; 3.1 First housing; 3.2 First top block; 3.3 First spring; 3.4 First cover plate; 4. Second clamping module; 4.1 Second housing; 4.2 Second top block; 4.3 Second spring; 4.4 Second cover plate; 5. Groove. Specific implementation mode

[0038] The following further illustrates the present utility model through specific embodiments in conjunction with the accompanying drawings, but it is not used to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of this design scheme.

[0039] Embodiment

[0040] The following materials are used in this embodiment:

[0041] Prepare a thick stainless steel square plate as the raw material and mill it into the base 1. AsFigure 1 and Figure 2 As shown, two cross grooves are machined at the center of the thick stainless - steel plate. The longitudinal groove is deeper than the transverse groove, and they are distributed in a cross - staggered manner, one above the other.

[0042] Prepare a stainless - steel block as the raw material, and form the first outer shell 3.1 through milling and drilling. As Figure 7 and Figure 8 shown, the outer shape of the first outer shell 3.1 is an inverted "convex" - shaped structure. A round hole that communicates front - to - back and a stepped square hole that also communicates front - to - back are opened on it. The square stepped hole is located on the upper side, and the round hole is located on the lower side.

[0043] Prepare a stainless - steel block as the raw material, and form the second outer shell 4.1 through milling and drilling. As Figure 5 and Figure 6 shown, the structure of the second outer shell 4.1 is the same as that of the first outer shell 3.1, and the sizes of the holes are exactly the same. The sizes of the second outer shell 4.1 and the first outer shell 3.1 can be processed according to the size of the mold during actual use.

[0044] Prepare a stainless - steel block as the raw material, and mill it into the first top block 3.2 and the second top block 4.2. The first top block 3.2 and the second top block 4.2 have the same structure and size. As Figure 9 and Figure 10 shown, a boss is machined on one end face of the first top block 3.2 as a stop block, and four round blind holes for installing the first spring 3.3 are machined on the stop block.

[0045] Prepare a stainless - steel block as the raw material, and mill it into the first cover plate 3.4 and the second cover plate 4.4. The first cover plate 3.4 and the second cover plate 4.4 have the same structure and size. As Figure 11 and Figure 12 shown, the structure of the first cover plate 3.4 is a rectangular block structure, and four round bosses for connecting the first spring 3.3 are fixed on one of its faces.

[0046] Prepare sixteen springs, namely the first spring 3.3 and the second spring 4.3 respectively.

[0047] Prepare two sets of screw - nut assemblies 2. The screw - nut assembly 2 is a known prior art, which includes a bidirectional trapezoidal screw 2.1, a fixed seat 2.2 and a nut 2.3.

[0048] Prepare several bolts.

[0049] The assembly method of the above materials is as follows:

[0050] The first step: As Figure 3 and Figure 4As shown in the figure, a first top block 3.2 is inserted into the square stepped hole above the first housing 3.1. Subsequently, four first springs 3.3 are inserted into the circular blind holes of the first top block 3.2. Finally, the first cover plate 3.4 is placed on top. The four cylindrical bosses of the first cover plate 3.4 pass through the springs, and the first cover plate 3.4 is fixed to the first housing 3.1 with bolts. The joint of the first cover plate 3.4 is the installation opening, and thus the first tightening module 3 is assembled.

[0051] The structure of the second tightening module 4 is the same as that of the first tightening module 3. Therefore, the assembly method of the second tightening module 4 is the same as that of the first tightening module 3.

[0052] Step 2: As shown in Figure 1 and Figure 2 the figure, the first tightening module 3 is assembled with the lead screw nut assembly 2. The trapezoidal lead screw 2.1 with a nut 2.3 is longitudinally inserted into the longitudinal groove 5, specifically passing through the circular holes of the two first housings 3.1 in the groove 5, and the first housing 3.1 is fixed to the nut 2.3 with bolts. The assembly of the second tightening module 4 and the lead screw nut assembly 2 is the same as above, and it is horizontally installed in the horizontal groove 5 on the base 1.

[0053] Step 3: The lead screw nut assembly 2 is fixed in the groove 5 of the base 1 through the fixed seat 2.2. As shown in Figure 1 the figure, the two first tightening modules 3 are symmetrically arranged front and back with respect to the intersection position of the two grooves 5 of the base 1, and the two second tightening modules 4 are symmetrically arranged left and right with respect to the intersection position of the two grooves 5 of the base 1.

[0054] Instructions for use are as follows:

[0055] As shown in Figure 13 the figure, place the mold at the center of the base 1. Rotate the two trapezoidal lead screws 2.1 so that the mold is clamped at the center position of the base 1 by the first tightening module 3 and the second tightening module 4. At this time, the first top block 3.2 and the second top block 4.2 retract into the first housing 3.1 and the second housing 4.1, and the first spring 3.3 and the second spring 4.3 are also compressed and in a compressed state. The self-locking property of the lead screw nut assembly 2 is limited. During the mold processing, when the nut 2.3 is stressed under external forces, there will still be a slight backward movement, which affects the positioning accuracy. The first spring 3.3 and the second spring 4.3 generate elastic deformation to give an inward thrust to the first top block 3.2 and the second top block 4.2 to clamp the mold, so as to compensate for the slight backward movement of the nut 2.3 and ensure the positioning accuracy.

[0056] This precise positioning device for mold processing can be applied to molds of different sizes, reducing the replacement of positioning parts when positioning different molds, and the positioning is fast and precise, and the mold is not easily loosened by external forces.

Claims

1. A precise positioning device for mold processing, comprising a base (1), characterized in that: Two sets of lead screw nut assemblies (2) are provided on the base (1). Each lead screw nut assembly (2) includes a trapezoidal lead screw ( 2.1) that can rotate independently. The two trapezoidal lead screws (2.1) are cross - staggered and vertically distributed independently. Nuts (2.3) in threaded fit are sleeved on the trapezoidal lead screws (2.1) at both sides of the intersection point at intervals. On the top of the two nuts (2.3) sleeved on the longitudinally arranged trapezoidal lead screw (2.1), a first tightening module (3) is fixed. The first tightening module (3) includes a first housing (3.1). On the inner - facing side of the two first housings (3.1), a first pressing block (3.2) is connected through a first spring (3.3). The first spring (3.3) between the first housing (3.1) and the first pressing block (3.2) is arranged longitudinally. One end of the first spring (3.3) is connected to the first housing (3.1), and the other end is connected to the first pressing block (3.2). On the top of the two nuts (2.3) sleeved on the horizontally arranged trapezoidal lead screw (2.1), a second tightening module (4) is fixed. The second tightening module (4) includes a second housing (4.1). On the inner - facing side of the two second housings (4.1), a second pressing block (4.2) is connected through a second spring (4.3). The second spring (4.3) between the second housing (4.1) and the second pressing block (4.2) is arranged horizontally. One end of the second spring (4.3) is connected to the second housing (4.1), and the other end is connected to the second pressing block (4.2). When the first spring (3.3) and the second spring (4.3) are in a compressed state, the first pressing block (3.2) and the second pressing block (4.2) respectively press tightly against the mold inward.

2. The precise positioning device for mold processing according to claim 1, wherein: Corresponding to the trapezoidal lead screw (2.1), grooves (5) are opened on the base (1). The trapezoidal lead screw (2.1) is installed in the grooves (5), and fixing seats (2.2) are fixed at the ends in the grooves (5). The trapezoidal lead screw (2.1) is rotationally and cooperatively connected with the fixing seat (2.2).

3. The precise positioning device for mold processing according to claim 2, wherein: The interior of the first housing (3.1) is a hollow structure. On the inner - facing side of the first housing (3.1), an opening through which the first pressing block (3.2) can enter and exit independently is opened. The first spring (3.3) is located inside the first housing (3.1). The interior of the second housing (4.1) is a hollow structure. On the inner - facing side of the second housing (4.1), an opening through which the second pressing block (4.2) can enter and exit independently is opened. The second spring (4.3) is located inside the second housing (4.1). When the first spring (3.3) is in a compressed state, the end of the first pressing block (3.2) facing the mold is located outside the first housing (3.1). When the second spring (4.3) is in a compressed state, the end of the second pressing block (4.2) facing the mold is located outside the second housing (4.1).

4. The mold processing precise positioning device according to claim 3, characterized in that: Both the first spring (3.3) and the second spring (4.3) are four in number.

5. The mold processing precise positioning device according to claim 4, characterized in that: One end of the first spring (3.3) fixed inside the first housing (3.1) is connected to a first cover plate (3.4), and one end of the second spring (4.3) fixed inside the second housing (4.1) is connected to a second cover plate (4.4).

6. The precise positioning device for mold processing according to claim 5, wherein: The first clamping module (3) is symmetrically arranged front and back with the horizontally arranged trapezoidal lead screw (2.1) as the axis, and the second clamping module (4) is symmetrically arranged left and right with the vertically arranged trapezoidal lead screw (2.1) as the axis.

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