Single-groove punching die for stator punching sheet

Abstract

The utility model provides a stator punching sheet single-groove punching die which comprises an inner hole separating male die, a pear-shaped groove male die and a female die, the upper ends of the inner hole separating male die and the pear-shaped groove male die are connected with a mounting groove arranged on a male die fixing plate, and the lower ends of the inner hole separating male die and the pear-shaped groove male die are matched with a mounting groove on a stripper plate and extend out of the lower surface of the stripper plate; the male die fixing plate and the stripper plate are fixedly connected through a connecting bolt, and a rubber pad is arranged between the stripper plate and the male die fixing plate. And the male die fixing plate and the female die are fixed at corresponding notch positions on a punching machine. According to the single-groove punching die, the pear-shaped groove male die and the inner hole separation male die are adopted at the same time, the two tool bits are tightly connected with the installation groove of the male die fixing plate in an interference fit mode, and a pear-shaped notch of a punching sheet and an inner hole of the punching sheet can be separated at the same time in the punching process of the die.

Description

Technical Field

[0001] The utility model relates to a stamping die, in particular to a stator punching sheet single slot stamping die. Background Art

[0002] In the trial production stage before mass production of motors and in order to meet the needs of various non-standard motors in different use environments and working conditions, due to uncertainty about the performance of the motor and the need to shorten the production cycle, if the integrated mold is directly invested, the product cycle will be extended and the cost investment will be large. The use of single-slot punching dies can shorten the manufacturing cycle and reduce the cost investment. However, the existing single-slot punching dies have certain shortcomings and cannot solve the following problems:

[0003] 1. How does the die separate the inner circle of the punch and the pear-shaped notch simultaneously during the stamping process?

[0004] 2. How to fix the mold quickly and easily.

[0005] 3. How to prevent the mold from falling off due to vibration and how to quickly reset the blade. Utility Model Content

[0006] The utility model aims to overcome the shortcomings of the prior art and provides a stator punching sheet single slot punching die. The utility model single slot punching die adopts two types of cutter heads, a pear-shaped slot punch and an inner hole separation punch. The two types of cutter heads are tightly connected with the mounting groove of the punch fixing plate by interference fit. The die can simultaneously separate the pear-shaped slot of the punching sheet and the inner hole of the punching sheet during the stamping process.

[0007] In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:

[0008] A single-slot punching die for a stator punching sheet comprises an inner hole separation punch, a pear-shaped slot punch and a concave die, wherein the upper ends of the inner hole separation punch and the pear-shaped slot punch are connected to the mounting slot on the punch fixing plate, and the lower ends are matched with the mounting slot on the stripper plate and extend out of the lower surface of the stripper plate;

[0009] The punch fixing plate and the stripper plate are connected by connecting bolts, and a rubber pad is arranged between the stripper plate and the punch fixing plate;

[0010] The male die fixing plate and the female die are fixed on corresponding notch positions on the punching machine.

[0011] Furthermore, a first mounting groove and a second mounting groove are provided on the punch fixing plate, the upper end of the inner hole separation punch is interference fit with the first mounting groove, and the upper end of the pear-shaped groove punch is interference fit with the second mounting groove.

[0012] Furthermore, a groove is provided on the upper surface of the stripping plate, the rubber pad is provided in the groove, the upper surface of the rubber pad contacts the lower surface of the punch fixing plate, and the thickness of the rubber pad is greater than the depth of the groove.

[0013] Furthermore, the lower end surface of the inner hole separation punch is an inclined surface.

[0014] Furthermore, the pear-shaped groove convex mold is integrally formed, including an arc-shaped end face, a square protrusion and a transition portion located therebetween, and the connection between the square protrusion and the transition portion is transitioned by a slope;

[0015] Arranged by size, they are the arc-shaped end face, the transition part and the square protrusion, and the size of the transition part gradually decreases.

[0016] Furthermore, the left and right sides of the punch fixing plate and the die are both arranged as inclined surfaces along their thickness direction, and the upper surface size of the punch fixing plate is larger than the lower surface size, and the upper surface size of the die is smaller than the lower surface size.

[0017] Furthermore, the punch fixing plate can move up and down relative to the die along with the punch press slider, and a locking nut is provided on the connecting bolt to prevent the connecting bolt from falling off during the up and down movement of the punch fixing plate.

[0018] Furthermore, the stripping plate and the die are both provided with mounting grooves that cooperate with the inner hole separation punch and the pear-shaped groove punch.

[0019] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0020] 1) The stator punch single slot punching die of the utility model adopts two kinds of cutter heads, namely, a pear-shaped slot punch and an inner hole separation punch. The two cutter heads are tightly connected with the mounting slot of the punch fixing plate by interference fit. The die can simultaneously separate the pear-shaped slot of the punch and the inner hole of the punch during the stamping process.

[0021] 2) In the stator punching single slot die of the utility model, the left and right sides of the punch fixing plate and the die are arranged as inclined surfaces along the thickness direction, and the upper surface size of the punch fixing plate is larger than the lower surface size, and the upper surface size of the die is smaller than the lower surface size, so that the punch fixing plate and the die can be quickly inserted directly into the slot on the punch press for use.

[0022] 3) The punch fixing plate and the stripper plate in the stator punching single slot punching die of the utility model are fixed together by four connecting bolts. In order to prevent the stripper plate from falling off due to continuous vibration during use, a locking nut is added to each connecting bolt to effectively prevent the connecting bolt from loosening.

[0023] 4) A rubber pad is provided between the stripping plate and the punch fixing plate in the stator punching single slot punching die of the utility model. Since the rubber pad has a certain elasticity, it can not only reduce vibration, but also enable the pear-shaped slot punch and the inner hole separation punch to be quickly reset during the rising process of the punch head of the punch press after each punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of a single slot punching die for a stator punching sheet in an embodiment of the utility model.

[0025] Figure 2 for Figure 1 Schematic diagram of the structure in which the punch fixing plate and the stripper plate are combined together.

[0026] Figure 3 yes Figure 1 Top view of the punch fixing plate.

[0027] Figure 4 yes Figure 1 Front view of the punch fixing plate.

[0028] Figure 5 yes Figure 1 Front view of the middle and inner hole separation punch.

[0029] Figure 6 yes Figure 1 Front view of the middle pear-shaped groove punch.

[0030] Figure 7 yes Figure 1 Front view of the middle stripper plate.

[0031] Figure 8 yes Figure 1 Top view of the stripper plate.

[0032] Fig. 9 yes Figure 1 Front view of the die.

[0033] Fig.10 yes Figure 1 Top view of the die.

[0034] Explanation of the reference numerals: 1-punch fixing plate; 2-inner hole separation punch; 3-pear-shaped groove punch; 4-connecting bolt; 5-locking nut; 6-rubber pad; 7-stripping plate; 8-die; 11-first mounting groove; 12-second mounting groove; 31-arc end face; 32-square protrusion; 33-transition portion; 71-groove. DETAILED DESCRIPTION

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "left, right", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] Example 1

[0038] like Figure 1-10 As shown, a single-slot punching die for a stator punching sheet comprises an inner hole separation punch 2, a pear-shaped slot punch 3 and a die 8, wherein the upper ends of the inner hole separation punch 2 and the pear-shaped slot punch 3 are connected to the mounting groove on the punch fixing plate 1, and the lower ends are matched with the mounting groove on the stripper plate 7 and extend out of the lower surface of the stripper plate 7;

[0039] The punch fixing plate 1 and the stripper plate 7 are connected by connecting bolts 4, and a rubber pad 6 is provided between the stripper plate 7 and the punch fixing plate 1;

[0040] The punch fixing plate 1 and the die 8 are fixed at corresponding notch positions on the punch press.

[0041] The punch fixing plate 1 is provided with a first mounting groove 11 and a second mounting groove 12 , the upper end of the inner hole separation punch 2 is interference fit with the first mounting groove 11 , and the upper end of the pear-shaped groove punch 3 is interference fit with the second mounting groove 12 .

[0042] The upper surface of the stripper plate 7 is provided with a groove 71 , and a rubber pad 6 is provided in the groove 71 . The upper surface of the rubber pad 6 contacts the lower surface of the punch fixing plate 1 , and the thickness of the rubber pad 6 is greater than the depth of the groove 71 .

[0043] The lower end surface of the inner hole separation punch 2 is an inclined surface.

[0044] The pear-shaped groove punch 3 is integrally formed, and includes an arc-shaped end surface 31, a square protrusion 32 and a transition portion 33 located therebetween, and the connection between the square protrusion 32 and the transition portion 33 is transitioned by a slope;

[0045] In order of size, they are the arc-shaped end surface 31 , the transition portion 33 and the square protrusion 32 , and the size of the transition portion 33 gradually decreases.

[0046] The left and right sides of the punch fixing plate 1 and the die 8 are both arranged as inclined surfaces along their thickness direction, and the upper surface size of the punch fixing plate 1 is larger than the lower surface size, and the upper surface size of the die 8 is smaller than the lower surface size.

[0047] The punch fixing plate 1 can move up and down with the punch press slider. A locking nut 5 is provided on the connecting bolt 4. The locking nut 5 is arranged between the lower surface of the punch fixing plate 1 and the upper surface of the stripping plate 7 to prevent the connecting bolt 4 from falling off during the up and down movement of the punch fixing plate 1.

[0048] The stripping plate 7 and the concave die 8 are both provided with mounting grooves which cooperate with the inner hole separation punch 2 and the pear-shaped groove punch 3 .

[0049] Since the punch fixing plate 1 is fixed, and the stripper plate 7 is movable relative to the punch fixing plate 1, when the punch press slide moves downward, the punch fixing plate 1 moves downward with the inner hole separation punch 2 and the pear-shaped groove punch 3, and stops moving when the stripper plate 7 contacts the die 8, while the inner hole separation punch 2 and the pear-shaped groove punch 3 continue to move downward, and the inner hole separation punch 2 and the pear-shaped groove punch 3 pass through the punch to be processed fixed on the punch press, and enter the mounting groove on the die 8. In this process, the through hole on the punch to be processed is punched, and a punch is punched. After the through hole is formed, the punch press slider drives the punch fixing plate 1 and the stripper plate 7 to move upward until the inner hole separation punch 2 and the pear-shaped groove punch 3 are separated from the punch to be processed, and the punch to be processed is rotated to a suitable angle. The punch press slider drives the punch fixing plate 1 and the stripper plate 7 to descend to punch the next through hole, and the cycle is repeated. After all the through holes are punched, the punch press slider drives the punch fixing plate 1 and the stripper plate 7 to move upward until the inner hole separation punch 2 and the pear-shaped groove punch 3 are separated from the finished punch. The finished punch is removed and another punch to be processed is installed.

[0050] The rubber pad 6 between the punch fixing plate 1 and the stripper plate 7 is elastic and has the following functions:

[0051] First, it plays a certain role in reducing vibration;

[0052] Second, it is to prevent the inner hole separation punch 2 and the pear-shaped groove punch 3 from having too long a downward stroke;

[0053] Third, after the inner hole separation punch 2 and the pear-shaped groove punch 3 cut the punching notch, the reaction force generated by the rubber compression during the rising process can quickly reset the inner hole separation punch 2, the pear-shaped groove punch 3 and the stripping plate 7.

[0054] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A single slot punching die for stator punching, characterized in that: It comprises an inner hole separation punch (2), a pear-shaped groove punch (3) and a die (8), wherein the upper ends of the inner hole separation punch (2) and the pear-shaped groove punch (3) are connected to the mounting groove provided on the punch fixing plate (1), and the lower ends are matched with the mounting groove on the stripping plate (7) and extend out of the lower surface of the stripping plate (7); The punch fixing plate (1) and the stripper plate (7) are connected via connecting bolts (4), and a rubber pad (6) is provided between the stripper plate (7) and the punch fixing plate (1); The punch fixing plate (1) and the die (8) are fixed at corresponding notch positions on the punch press.

2. The stator punching sheet single slot punching die according to claim 1, characterized in that: The punch fixing plate (1) is provided with a first mounting groove (11) and a second mounting groove (12); the upper end of the inner hole separation punch (2) is interference fit with the first mounting groove (11), and the upper end of the pear-shaped groove punch (3) is interference fit with the second mounting groove (12).

3. The stator punching sheet single slot punching die according to claim 1, characterized in that: The upper surface of the stripper plate (7) is provided with a groove (71), the rubber pad (6) is arranged in the groove (71), the upper surface of the rubber pad (6) is in contact with the lower surface of the punch fixing plate (1), and the thickness of the rubber pad (6) is greater than the depth of the groove (71).

4. The stator punching sheet single slot punching die according to claim 1, characterized in that: The lower end surface of the inner hole separation punch (2) is an inclined surface.

5. The stator punching sheet single slot punching die according to claim 1, characterized in that: The pear-shaped groove punch (3) is integrally formed and comprises an arc-shaped end surface (31), a square protrusion (32) and a transition portion (33) located therebetween, wherein the connection between the square protrusion (32) and the transition portion (33) is formed by a slope transition; Arranged in order of size, they are the arc-shaped end surface (31), the transition portion (33) and the square protrusion (32), and the size of the transition portion (33) gradually decreases.

6. The stator punching sheet single slot punching die according to claim 1, characterized in that: The left and right sides of the punch fixing plate (1) and the die (8) are both arranged as inclined surfaces along their thickness directions, and the upper surface size of the punch fixing plate (1) is larger than the lower surface size, and the upper surface size of the die (8) is smaller than the lower surface size.

7. The stator punching sheet single slot punching die according to claim 1, characterized in that: The punch fixing plate (1) can move up and down relative to the die (8) along with the punch slide, and a locking nut (5) is provided on the connecting bolt (4) to prevent the connecting bolt (4) from falling off during the up and down movement of the punch fixing plate (1).

8. The stator punching sheet single slot punching die according to claim 1, characterized in that: The stripping plate (7) and the concave die (8) are both provided with mounting grooves that cooperate with the inner hole separation punch (2) and the pear-shaped groove punch (3).

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